[ { "caption": "(a) Intracellular levels of spermidine (Spd) in chronologically ageing wild-type yeast. Data represent means ± s.e.m. (n = 3; *P 0.05 and *P 0.001).", "answer": "cell_type: None organism: yeast tissue: None cell_line: None subcellular: None" }, { "caption": "(b) Survival determined by clonogenicity during chronological ageing of wild-type yeast (BY4741) cells with (o) and without (▪) addition of spermidine (4 mM) at day 1. Data represent means ± s.e.m. (n = 5).", "answer": "cell_type: None organism: BY4741, yeast tissue: None cell_line: None subcellular: None" }, { "caption": "(c) Intracellular levels of spermidine in chronologically ageing wild-type yeast cells cultured with (open bar) or without (closed bar) spermidine (4 mM) for 5 days. Data represent means ± s.e.m. (n = 3; **P 0.001).", "answer": "cell_type: None organism: yeast tissue: None cell_line: None subcellular: None" }, { "caption": "(d) Replicative lifespan analysis of BY4741 wild-type yeast cells after separation into old (fraction V) and young (fraction II) cells by elutriation centrifugation. The remaining lifespan with or without (control) spermidine (1 mM, applied after elutriation) on 2% glucose synthetic complete medium is shown.", "answer": "cell_type: None organism: BY4741, yeast tissue: None cell_line: None subcellular: None" }, { "caption": "(e) Survival determined by the age-specific number of dead individuals of female Drosophila with and without (control) supplementation of food with various concentrations of spermidine (as indicated). A representative ageing experiment of at least 50 flies per sample is shown.", "answer": "cell_type: None organism: Drosophila tissue: None cell_line: None subcellular: None" }, { "caption": "(f) Endogenous spermidine of female Drosophila fed for 48 h with food supplemented by 1 mM spermidine, compared with normal food (control). Data represent means ± s.e.m. (n = 3; *P 0.01).", "answer": "cell_type: None organism: Drosophila tissue: None cell_line: None subcellular: None" }, { "caption": "(g) Survival determined by annexin V/7-AAD co-staining (unstained cells were considered as viable) of human immune cells (PBMC) cultured for 6 and 12 days in the absence (black bar) or presence (white bars) of various spermidine concentrations (as indicated). Data represent means ± s.e.m. of 3 independent experiments (each performed on PBMC from different donors). *P 0.05 and **P 0.01.", "answer": "cell_type: PBMC organism: human tissue: None cell_line: None subcellular: None" }, { "caption": "(h, i) Free thiol group (RSH) concentration in serum (h) and intracellular spermidine concentration in hepatocytes (i) of ageing mice with (open bars) or without (closed bar) supplementation of drinking water with spermidine (0.3 and 3 mM) for 200 days. Data represent mean ± s.e.m. (n = 3; *P 0.05 and **P 0.01).", "answer": "cell_type: hepatocytes organism: mice tissue: serum cell_line: None subcellular: None" }, { "caption": "(b) Chronological ageing of wild-type (▪, o) and polyamine-depleted Δspe1 (▴, ▿) yeast cells with (open symbols) and without (closed symbols) supplementation of low doses of spermidine. Data represent means ± s.e.m. (n = 4). Cells were tested for cell death markers at day 3.", "answer": "cell_type: None organism: yeast tissue: None cell_line: None subcellular: None" }, { "caption": "(e) Fluorescence microscopy of chronologically aged wild-type cells (day 3 and 14) expressing an EGFP-tagged version of the yeast HMGB1 homologue (Nhp6A-EGFP) with or without (control) addition of 4 mM spermidine. Scale bars, 5 μm.", "answer": "cell_type: None organism: yeast tissue: None cell_line: None subcellular: None" }, { "caption": "(e) Relative acetylation (normalized to controls) of histone H3 Lys 14 and 18 residues of cultured human PBMC after 6 days of incubation with or without 20 nM spermidine. Data represent quantification of two independent experiments performed with cells obtained from two different donors.", "answer": "cell_type: PBMC organism: human tissue: None cell_line: None subcellular: None" }, { "caption": "(f) Immunoblot analysis of liver cell extracts (applied in serial dilutions) obtained from mice fed with 3 mM spermidine for 200 days and respective control mice of the same age. Blots were probed with antibodies recognizing total histone H3 (C-terminal epitope) or specific for acetylated lysine 18 residue (N-terminal epitope). Full scans of blots are available in Supplementary Information, Fig. S5.", "answer": "cell_type: None organism: mice tissue: liver cell_line: None subcellular: None" }, { "caption": "(d) Relative inhibition of histone acetyltransferase activity (HAT-activity) by spermidine determined by an in vitro HAT-activity assay of yeast nuclear extracts of wild-type cells. Data represent means ± s.e.m. of three independent experiments (*P = 0.024).", "answer": "cell_type: None organism: yeast tissue: None cell_line: None subcellular: histone acetyltransferase, nuclear" }, { "caption": "(a) Fluorescence microscopy of wild-type yeast cells expressing an EGFP-Atg8p fusion protein with or without (control) treatment of 4 mM spermidine for 48 h. White arrows indicate vacuolar localization of EGFP-Atg8p indicative of autophagy. Scale bars, 5 μm.", "answer": "cell_type: None organism: yeast tissue: None cell_line: None subcellular: None" }, { "caption": "(b) Relative alkaline phosphatase activity (ALP activity) indicative of autophagy during chronological ageing of pho8ΔC60 yeast with (open bars) or without (closed bars) application of spermidine (4 mM). Data represent means ± s.e.m. (n = 3 *; P 0.01 and **P 0.001).", "answer": "cell_type: None organism: yeast tissue: None cell_line: None subcellular: None" }, { "caption": "(a) Fluorescence microscopy of Hoechst-counterstained HeLa cells transiently transfected with LC3-GFP subjected to 100 μM spermidine for 6 h. Representative pictures are shown. (b) Percentage of adherent cells exhibiting a clear LC3-GFP relocalization into cytoplasmic vacuoles. Numbers were determined using micrographs of Hoechst-counterstained HeLa cells as representatively shown in a. Data represent means ± s.d. (n = 3).", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: cytoplasmic vacuoles" }, { "caption": "(c) LysoTracker Red staining of vacuoles indicative of autophagy in oesophagus tissue from flies fed with 1 mM spermidine for two days, compared with controls (without spermidine). Nuclei were visualized by Hoechst staining. Scale bars, 10 μm.", "answer": "cell_type: None organism: flies tissue: oesophagus tissue cell_line: None subcellular: Nuclei, vacuoles" }, { "caption": "(d) Quantification of autophagic vesicles per nucleus in LysoTracker Red stained muscle tissue of female flies fed with supplementation of 1 mM spermidine or with 10% glucose (starved) for 48 h, compared with normal food (control). Data represent means ± s.e.m. of at least 20 flies for each group (*P 0.01).", "answer": "cell_type: None organism: flies tissue: muscle cell_line: None subcellular: autophagic vesicles, nucleus" }, { "caption": "(e, f) Survival of Drosophila during ageing without (control) and with supplementation of food at various concentrations of spermidine (as indicated). Autophagy-deficient flies (f) homozygous mutant for Atg7 (Δatg7) were compared with flies capable of autophagy (e) and heterozygous for Atg7 (control). For details of strains and additional wild-type controls, see Supplementary Information Methods and Fig. S6h, i.", "answer": "cell_type: None organism: Drosophila, flies tissue: None cell_line: None subcellular: None" }, { "caption": "(g) Fluorescence microscopy of C. elegans transgenic embryos expressing a full-length plgg-1DsRED::LGG-1 fusion protein indicative of autophagic activity. Shown are two representative pictures of embryos untreated (control) or treated with spermidine (0.2 mM) supplementation of food. (h) Quantification of autophagic activity through measurement of DsRED::LGG-1 pixel intensity from images of wild-type animals shown in g, and bec-1 RNAi knockdown animals (bec-1 RNAi). Data represent means ± s.e.m. (n = 3) with at least 25 images processed for each trial.", "answer": "cell_type: None organism: embryos tissue: None cell_line: None subcellular: None" }, { "caption": "(A) Time course of rapid internalization of fluorescent α-synuclein fibrils by CADcells (for characterization of α-synuclein assemblies, see Figure EV 1A). Internalization was measured by recording ATTO-550-positive neuron-like cells by flow cytometry. Percentage of ATTO-550-positive cells was quantified (mean ±s.e.m) (left panel) and representative histograms of ATTO-550-positive cells are showed on the right panel (a.u. arbitrary units). Similarly, α-synuclein fibrils internalization was also confirmed by fluorescent microscopy (see Figure EV 1B).", "answer": "cell_type: None organism: None tissue: None cell_line: CAD subcellular: fibrils" }, { "caption": "B) Representative images of donor (upper panel) and acceptor cells (lower panel) after 24 h co-culture. Donor cells were loaded with α-synuclein fibrils prior to co-culture with GFP-transfected acceptor cells; in red: α-synuclein fibrils, in green: acceptor cells and in blue: nuclei. Scale bar represents 10 μm. (n = 3 independent experiments). A larger field where donor and acceptor cells are shown is presented in Figure EV 3A.(C) Percentage of donor and acceptor cells containing α-synuclein fibrils after co-culture as in B: all acceptor cells received α-synuclein fibrils.(D) Quantification of the number of α-synuclein fibrils in donor and acceptor cells after co-culture as in B. Donor cells contain around 70 α-synuclein fibrils puncta (median) while acceptor cells contain 38 α-synuclein fibrils puncta, respectively (****, p < 0.0001 by two-tailed Mann Whitney test).(E) Quantification of the average size of α-synuclein fibrillar foci in donor and acceptor cells after co-culture as in B. (****, p < 0.0001 by two-tailed Mann Whitney test). In Figure EV 3 is shown an example of α-synuclein fibrillar puncta detection in an acceptor cell. After detection, the number and the size of foci were determined using the ICY software.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: fibrils, nuclei" }, { "caption": "(A) Representative confocal images showing ChFP-α-syn transfected cells (in red) cultured alone (upper) or co-cultured with donor cells containing fluorescent Alexa-488 α-synuclein fibrils (in green) for 72 h (bottom). The arrow is pointing out representative α-synuclein fibrils Alexa-488 co-localized with ChFP-α-syn puncta. Scale bar represents 10 μm. Nuclei are stained with DAPI (blue) (n=3 independent experiments).(B) Quantification of the number of ChFP-α-synuclein puncta in ChFP-α-syn acceptor cells showed a significant increase in ChFP-α-synuclein puncta number when cells were co-cultured with donor cells containing α-synuclein fibrils (***, p < 0.001 by two-tailed Mann Whitney test).(C) Quantification of the percentage of co-localization of α-synuclein fibrils Alexa-488 and ChFP-α-syn puncta. Data shows mean ± s.e.m. After co-culture, 11% of the transferred α-synuclein fibrils Alexa-488 co-localized with ChFP-α-syn puncta", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: fibrils, Nuclei" }, { "caption": "(A) Representative images of donor cells (upper panel) and acceptor cells (bottom panel) of the co-culture system explained in Figure EV 2E; in red: α-synuclein fibrils ATTO-550, in green: α-synuclein fibrils Alexa-488 and in blue: nuclei. Scale bar represents 10 μm (n=3 independent experiments). In insets, arrows point to co-localized ATTO-550 and Alexa-488 α-synuclein fibrils puncta whereas arrowheads point to puncta of α-synuclein Alexa-488 fibrils that do not co-localize with fibrillar ATTO-550 α-synuclein.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: fibrils, nuclei" }, { "caption": "(B) Quantification of the percentage of Alexa-488 α-synuclein fibrils co-localizing with α- ATTO-550 α-synuclein fibrils and the reverse co-localization in discrete puncta in donor and acceptor cells as in A. Both measurements revealed high co-localization of the two fluorophores in donor cells (white bar), but less in acceptor cells.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: fibrils" }, { "caption": "(C) The amount of fibrils taken up by CAD cells exposed to 1µM fibrils, of fibrils remaining in the cells and exported into the medium after 24h incubation were quantified by a filter trap assay. Data are mean ± s.d (n=3 independent measurements, filtered in duplicate). The standard fluorescence curve for increasing ATTO550-α-synucleinfibrils concentrations is given.", "answer": "cell_type: None organism: None tissue: None cell_line: CAD subcellular: fibrils" }, { "caption": "(D) Representative images of GFP-transfected acceptor cells that were either (i) co-cultured with donor cells (upper panel, Co-culture), (ii) cultured with the conditioned medium of donor cells (middle panel, CM) or (iii) physically separated from donor cells using a filter (bottom panel, Filter). Prior to culture, donor cells were loaded with ATTO-550 α-synuclein fibrils. In red: α-synuclein fibrils, in green: acceptor cells and in blue: nuclei. Scale bar represents 10 μm (n = 3 independent experiments).(E) Quantification of the percentage of acceptor cells containing α-synuclein fibrils from images such as those presented in C. When acceptor cells were cultured with the conditioned medium from donor cells previously treated with α-synucleinfibrils (not diluted, concentrated or diluted) or co-cultured with a filter, the percentage of acceptor cells containing α-synuclein puncta was low. Data shows mean ± s.e.m (***, p < 0.001; by two-tailed Student's t-test).(F) Quantification of the number of puncta of α-synuclein fibrils per acceptor cell from D. While in co-culture condition the number of α-synuclein puncta in acceptor cells is on average 35 (median), this number was on average 1 puncta per acceptor cells in CM and filter conditions, respectively (***, p < 0.001 by two-tailed Mann Whitney test).", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: fibrils, nuclei" }, { "caption": "(A) Representative images of control cells (upper panel) or cells treated with α-synucleinfibrilsATTO-550 (bottom panel) for 16 hours; in red: α-synucleinfibrils and in green: WGAAlexa-488 (plasma membrane dye marker), blue: DAPI. Scale bar represents 10 μm (n = 3 independent experiments).(B) Relative percentage of TNT-connected cells after α-synucleinfibrils treatment as in A shows an increase in TNT number upon fibrils treatment. Data are mean ± s.e.m (***, p < 0.001 by paired, two-tailed Student's t-test).", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: TNT, fibrils, plasma membrane" }, { "caption": "(C) Confocal images showing one TNT connecting two cells loaded with α-synucleinfibrilsATTO-550 (in red) 16 hours after co-culture and stained with WGAAlexa-488 (in blue). The image represents a Z-projection of the several middle stacks where the TNT is located (top panel). Insets show 3D reconstructions of the TNT using ICY software (middle panel: merge; bottom panel: red channel). Several α-synucleinfibrils (red) are present in the lumen of the TNT (WGAAlexa-488 in white). Scale bars represent 10 μm (confocal images) and 4 μm (insets).", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: TNT, fibrils" }, { "caption": "(D) Confocal image showing TNT connecting a donor cell containing α-synucleinfibrils and GFP transfected acceptor cell (top panel) strongly suggesting α-synucleinfibrils transfer from donor to acceptor cell. Insets show 3D reconstructions of TNT containing α-synucleinfibrils in the lumen of the TNT; in red: α-synucleinfibrils, in green: GFP transfected acceptor cells in blue: WGAAlexa-488. Scale bars represent 10 μm and 3 μm for the insets.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: TNT, fibrils" }, { "caption": "(E) Relative percentage of TNTs in cells containing α-synucleinfibrils untransfected (control) or transfected with Myosin 10 (Myosin 10). Overexpression of Myosin 10 in the donor cell population led to an increase in the number of TNTs.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: TNTs, fibrils" }, { "caption": "(F) Quantification of the average number of ATTO-550α-synucleinfibrils per acceptor cell after 24 hours co-culture with donor cells containing α-synucleinfibrils untransfected (control) or transfected with Myosin 10 (Myosin 10). Note that Myosin 10 overexpression increases both the transfer of DiIvesicles and the number of transferred α-synuclein puncta in acceptor cells; n = 3 independent experiments (**, p < 0.01 by two-tailed Mann Whitney test).", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: fibrils, vesicles" }, { "caption": "(G) Quantification of the relative proportion of TNTs in co-culture of donor cells containing α-synuclein puncta and GFP acceptor cells under sub-confluent or sparse culture conditions. Data are mean ± s.e.m; n = 3 independent experiments (*, p < 0.05 by paired, two-tailed Student's t-test).(H) Quantification of the percentage of acceptor cells containing α-synuclein puncta of the co-culture in G. n = 3 independent experiments (*, p < 0.05 by two-tailed Mann Whitney test). Condition impairing TNT formation (i.e., sparse condition) induces a drastic decrease of TNT number and α-synucleinfibrils transfer compared to condition allowing TNT formation (sub-confluent condition).", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: TNT, TNTs, fibrils" }, { "caption": "(A) Subcellular localization of α-synucleinfibrils in donor cells after 24 hours co-culture. The left panels show representative images of co-localization of α-synuclein puncta with early endosomes (EEA1, top panel), recycling endosomes (Vamp3, middle panel) and lysosomal vesicles (Lamp1, bottom panel) (see arrows for co-localized spots); in red: α-synucleinfibrils, in green: EEA1, Vamp3 or Lamp1 and in blue: nuclei. Scale bar represents 10 μm. On the right, the bar graph represents the percentage of α-synucleinpuncta co-localized with endo-lysosomal vesicles in A. Data are mean ± s.e.m. from three independent experiments.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: early endosomes, fibrils, lysosomal vesicles, nuclei, recycling endosomes" }, { "caption": "(B) Confocal images showing a TNT connecting two cells loaded with α-synucleinfibrilsATTO-550 immunostained with Lamp1 (in green). Labelling of TNTs is performed using a plasma membrane dye (WGAAlexa-488, in blue). The image represents a Z-projection of the several middle stacks where the TNT is located. The merged image with WGA-Alexa 633 (blue), the orthogonal view and insets showing 3D reconstructions of the TNT (with WGA in white) are in the right panel. Several α-synuclein fibrillar foci (in red) are present in the lumen of the TNT and embedded in Lamp1 positive vesicles (in green). Of note, only tubular structures physically connecting remote cells and not touching the substratum were identified as TNTs to distinguish them from filopodia. Scale bars represent 10 μm (confocal images) and 3 μm (insets). The merge of α-synucleinfibrils (red) and Lamp1 (green) channels and the respective single channels are showed on the left panel.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: TNT, TNTs, fibrils, filopodia, plasma membrane" }, { "caption": "(C) The top panels show representative images of GFP-transfected acceptor cells after 24 h co-culture with donor cells containing α-synucleinfibrilsATTO-550. Immunofluorescence was performed with endo-lysosomal organelle markers (top panel: EEA1, middle panel: Vamp3 and Lamp1: bottom panel) and revealed that α-synucleinfibrils co-localized with lysosomal vesicles (see arrow); in red: α-synucleinfibrils, in green: organelle markers and in blue: nuclei. Scale bar represents 10 μm, arrows pinpoint assemblies co-localizing with organelle markers. The bar graph at the bottom shows the quantification of the percentage of co-localization of α-synucleinfibrils with organelle markers, revealing that α-synuclein puncta co-localized mostly with lysosomal vesicles. Data show mean ± s.e.m. from three independent experiments.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: fibrils, lysosomal vesicles, nuclei" }, { "caption": "(D) Representative confocal pictures of control cells loaded with ATTO-550α-synucleinfibrils and LysoTracker Deep Red (top panel), and of donor (middle panel) and acceptor GFP-transfected acceptor cells (bottom panel, GFP-vector not shown) cells, loaded with α-synucleinfibrilsATTO-550 and LysoTracker Deep Red (middle panel) and co-cultured for 24 hours; in red: α-synucleinfibrils, in green: LysoTracker Deep Red and in blue: nuclei. Scale bar represents 10 μm, arrows in inset pinpoint fibrils co-localizing with LysoTracker positive vesicles.(E) The percentage of co-localization of LysoTracker positive vesicles with α-synucleinfibrils revealed that 80% of lysosomal vesicles that transferred from donor to acceptor cells contained α-synucleinfibrils thus demonstrating direct transfer of α-synucleinfibrils from donor to acceptor cells in majority inside lysosomal vesicles derived from donor cells. Data show mean ± s.e.m. from three independent experiments.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: fibrils, lysosomal vesicles, nuclei" }, { "caption": "(A) Representative images of control (upper panel) and α-synuclein loaded neurons (middle, 0.5µM, and bottom, 1µM, panels) after 16 h. In red: α-synuclein fibrils, in green: MAP-2 and in blue: nuclei. Scale bar represents 10 μm.", "answer": "cell_type: neurons organism: None tissue: None cell_line: None subcellular: fibrils, nuclei" }, { "caption": "(B) Representative images of donor (upper panels) and acceptor neurons (bottom panels) after 72 hours in co-culture. Donor neurons were loaded with α-synuclein fibrils prior to co-culture with CTG-labelled acceptor neurons and then cells were labelled either with MAP-2 (first and third panels) or Lamp1 (second and fourth panels). In red: α-synuclein fibrils, in green: CTG, in white: MAP-2/ Lamp1 and in blue: nuclei. Scale bar represents 5 μm.(C) The graph bar shows the percentage of donor (white bar) and acceptor (black bar) neurons containing α-synuclein puncta. Data show mean ± s.e.m.(D) The box plot depicts the number of puncta in donor (white) and acceptor (grey) neurons.(E) Box plot showing the distribution of the average size of α-synuclein puncta in donor (white) and acceptor (grey) neurons.(F) The graph bar represents the percentage of α-synuclein puncta co-localized with lysosomes in donor (white) and acceptor (black) neurons. Data show mean ± s.e.m. Graphs in C, D, E and F correspond to data from 3 independent experiments analysed after 72 hours of co-culture (****, p < 0.0001 compared to donor by two-tailed Mann Whitney test).", "answer": "cell_type: neurons organism: None tissue: None cell_line: None subcellular: fibrils, lysosomes, nuclei" }, { "caption": "(B) Representative images of acceptor neurons that were either (i) co-cultured with donor neurons (upper panel, Co-culture), (ii) physically separated from donor cells (middle panel, No contact) or (iii) cultured with the conditioned medium of donor neurons (bottom panel, CM). In red: α-synucleinfibrils, in white: acceptor neurons and in blue: nuclei. Scale bar represents 10 μm.", "answer": "cell_type: neurons organism: None tissue: None cell_line: None subcellular: fibrils, nuclei" }, { "caption": "(C) The graph bar shows the percentage of acceptor cells containing α-synuclein puncta from images such as those presented in B. ****, p < 0.001 compared to the co-culture condition by two-tailed Student's t-test. Data show mean ± s.e.m from 3 independent experiments.(D) The box plot shows the number of α-synuclein puncta in acceptor neurons in co-culture (white), in CM (grey) and in the No contact condition (light grey). ****, p < 0.001 compared to the co-culture condition by two-tailed Mann Whitney test (n=3 independent experiments)..", "answer": "cell_type: neurons organism: None tissue: None cell_line: None subcellular: None" }, { "caption": "(E) Western blot analysis of α-synuclein indicates the presence of some α-synuclein in the CM of neurons loaded with the fibrils, after 72h compared to control medium and to lysate of cells directly exposed to the fibrils. α-tubulin was used as loading control.", "answer": "cell_type: neurons organism: None tissue: None cell_line: None subcellular: fibrils" }, { "caption": "(A) Representative images of donor (upper panel) and acceptor cells (bottom panel) after 24 hours in co-culture. Donor neurons were loaded with α-synucleinfibrils prior to co-culture with H2B-GFP-acceptor CAD cells. In red: α-synuclein puncta, in green: acceptor CADs, in white donor neurons and in blue: nuclei. The images of donor cells are representative Z-stack projections of the lower slices where these cells are located, and the images corresponding to acceptor CADs are Z-stack projections of the upper slices, covering the whole cell body. Scale bar represents 10 μm.(B) Box plots showing the number (left side) and average size (right side) of α-synuclein puncta in acceptor CAD cells after 24 hours in co-culture with donor neurons. (n=3 independent experiments).", "answer": "cell_type: neurons organism: None tissue: None cell_line: CAD, CADs subcellular: fibrils, nuclei" }, { "caption": "(C) Representative images showing a TNT detected between CAD cells and neurons after 24 hours in co-culture. In green: MAP-2, in white: WGA, in red: α-synuclein puncta and in blue nuclei. The merge image in the bottom panel shows in detail the TNT connecting the cells, and the insets and the 3D reconstruction of the neuron (green) and the CAD cell (white) show the presence of α-synuclein puncta inside the TNT.", "answer": "cell_type: neuron, neurons organism: None tissue: None cell_line: CAD subcellular: TNT, nuclei" }, { "caption": "(D) The distribution of histone reads in 5' UTR, CDS and 3' UTR in rRNA-depleted nuclear RNA-seq and ALYREF-iCLIP-seq.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: nuclear" }, { "caption": "IPs from RNase A-treated S-phase HeLa cell lysate using the SLBP antibody or IgG (A) Western blotting was performed with indicated antibodies. 2% of input was loaded. * indicates a nonspecific band. The white line delineates the boundary where irrelevant lanes have been removed from the same blots", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "IPs from RNase A-treated S-phase HeLa cell lysate using the ALYREF antibody or IgG (B). Western blotting was performed with indicated antibodies. 2% of input was loaded. * indicates a nonspecific band. The white line delineates the boundary where irrelevant lanes have been removed from the same blots", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "(E) (Top) Domain schematic representation of SLBP. (Bottom) Flag IPs from RNase A-treated HeLa cell lysate individually expressing indicated Flag tagged proteins, followed by western blotting using Flag and ALYREF antibodies. 3% of input was loaded. The * indicates a band probably resulted from degradation of Flag-SLBP. The white line delineates the boundary where irrelevant lanes have been removed from the same blot", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "Cntl- or SLBP-siRNA treated HeLa cells were used for IPs with IgG or the ALYREF antibody. The immunoprecipitates were subjected to western analysis (H) Error bars represent standard deviations from biological repeats (n=3). Statistical analysis was performed using Student's t-test. *P < 0.05, **P < 0.01, ***P< 0.001, n.s., not significant.", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "Cntl- or SLBP-siRNA treated HeLa cells were used for IPs with IgG or the ALYREF antibody. The immunoprecipitates were subjected to RT-qPCRs (I). Error bars represent standard deviations from biological repeats (n=3). Statistical analysis was performed using Student's t-test. *P < 0.05, **P < 0.01, ***P< 0.001, n.s., not significant.", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "IPs were carried out from RNase A-treated S-phase HeLa cell lysate using the Lsm11 antibody and IgG (A) followed by western blotting with indicated antibodies. 2 % of input was loaded. * indicates a nonspecific band. The white line delineates the boundary where irrelevant lanes have been removed from the same blot", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "IPs were carried out from RNase A-treated S-phase HeLa cell lysate using the ALYREF antibody and IgG (B), followed by western blotting with indicated antibodies. 2 % of input was loaded. * indicates a nonspecific band. The white line delineates the boundary where irrelevant lanes have been removed from the same blot", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "(A) (Top) Illustration of the HIST2H2AA3 reporter construct. (Bottom) FISH to detect the distribution of the HIST2H2AA3 mRNA in HeLa cells depleted of Cntl, ALYREF, THOC2 (THO) and UAP56. DAPI staining served as a nuclear marker. N and C indicate nuclear and cytoplasmic FISH signals, respectively. N/C ratios were determined for 20 cells in each experiment. Data information: Error bars represent standard deviations from biological repeats (n=3 Statistical analysis was performed using Student's t-test. *P < 0.05, **P < 0.01, ***P< 0.001.", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: cytoplasmic, nuclear" }, { "caption": "(B) Distribution of the endogenous HIST2H2AA3 mRNA was detected with the transcript-specific probe in HeLa cells depleted of Cntl, ALYREF, THOC2 (THO) and UAP56. N and C indicate nuclear and cytoplasmic FISH signals, respectively. N/C ratios were calculated Data information: Error bars represent standard deviations from biological repeats (n=3 Statistical analysis was performed using Student's t-test. *P < 0.05, **P < 0.01, ***P< 0.001.", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: cytoplasmic, nuclear" }, { "caption": "Western analysis to examine the purities of nuclear and cytoplasmic fractions (C) in Cntl and UAP56 KD cells. MTR4 and Tubulin were used as the nuclear and cytoplasmic marker, respectively.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: cytoplasmic, nuclear" }, { "caption": "(A) (Top) Illustration of the reporter constructs. The black and red lines indicate H2AA3-SL and H2AA3-SLD PCR products, respectively. The dashed line indicates the FISH probe. (Bottom) FISH to detect the distribution of the corresponding mRNA at 2 hr after injection of H2AA3-SL and H2AA3-SLD PCR products. C and N indicate cytoplasmic and nuclear FISH signals, respectively. C/N ratios were determined for 20 cells in each experiment. Data information: Error bars represent standard deviations from biological repeats (n=3). Statistical analysis was performed using Student's t-test. *P < 0.05, ***P< 0.001.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: cytoplasmic, nuclear" }, { "caption": "(B) (Top) Illustration of the reporter constructs. The dashed line indicates the FISH probe. FISH to detect mRNA distribution at 24 hr after transfection of the H1C-SL-Rb (cH1C) and H1C-SLD-Rb (pH1C) constructs. C/N ratios were quantified Data information Error bars represent standard deviations from biological repeats (n=3). Statistical analysis was performed using Student's t-test. *P < 0.05, ***P< 0.001.", "answer": "cell_type: None organism: None tissue: None cell_line: None subcellular: Rb" }, { "caption": "H1C-SL-Rb or H1C-SLD-Rb construct, together with VSV M were co-transfected into HeLa cells, followed by IPs with IgG or the ALYREF antibody at 24 hr post-transfection. The immunoprecipitates were subjected to western analysis to detect ALYREF (D)", "answer": "cell_type: None organism: VSV tissue: None cell_line: HeLa subcellular: Rb" }, { "caption": "H1C-SL-Rb or H1C-SLD-Rb construct, together with VSV M were co-transfected into HeLa cells, followed by IPs with IgG or the ALYREF antibody at 24 hr post-transfection. RT-qPCRs to detect RNAs (E). The bars in the graph shows the relative ALYREF IP efficiency, with that for the H1C-SL-Rb mRNA set as "1". Data information: Error bars represent standard deviations from biological repeats (n=3). Statistical analysis was performed using Student's t-test. *P < 0.05, ***P< 0.001.", "answer": "cell_type: None organism: VSV tissue: None cell_line: HeLa subcellular: Rb" }, { "caption": "(F) H1C-SLD-Rb construct with wild-type (H1C-SLDWT-Rb) or mutant (H1C-SLDmut-Rb) U7-binding sequence, together with VSV M, was co-transfected into HeLa cells, followed by IPs with IgG or the ALYREF antibody at 24 hr post-transfection. The immunoprecipitates were subjected to western analysis (left panel) and RT-qPCRs (right panel). The bars in the right graph show the relative ALYREF IP efficiency, with that for the H1C-SLDWT-Rb mRNA set as "1". Data information: Error bars represent standard deviations from biological repeats (n=3). Statistical analysis was performed using Student's t-test. *P < 0.05, ***P< 0.001.", "answer": "cell_type: None organism: VSV tissue: None cell_line: HeLa subcellular: Rb" }, { "caption": "A, B. Quantification of oryzalin root growth assays in single (A) and double (B) mutants. DAG = days after germination. Graphs show mean ± SD of three biological replicates with at least 10 plants per genotype per replicate. Asterisks indicate a significant difference in root length in a two-way ANOVA followed by Tukey's multiple comparisons test (* P < 0.05, ** P < 0.01, *** P < 0.001 and **** P < 0.0001).", "answer": "cell_type: None organism: None tissue: root, germination cell_line: None subcellular: None" }, { "caption": "E. Silique pictures of cycb1 double mutant combinations. White arrowheads indicate aborted ovules and seeds. Scale bars: 500 μm. F, G. Quantification of aborted seeds in single (F) and double (G) mutants. Graphs represents the average seed abortion rate per plant ± SD of three biological replicates, n = 550-1029 seeds analyzed per genotype. Asterisks indicate significant differences in seed abortion rate in an ordinary one-way ANOVA test, followed by a Dunnett's multiple comparisons test (**** P < 0.0001).", "answer": "cell_type: None organism: None tissue: ovules, seed, seeds, Silique cell_line: None subcellular: None" }, { "caption": "C, D. Quantification of endosperm nuclei in cycb1 single (C) and double (D) mutants. Boxes and whiskers represent min to max values with the median indicated as a central horizontal line, n = 26-30 seeds per genotype. Asterisks show significant differences in the number of endosperm nuclei per seed in a Kruskal-Wallis test followed by Dunn's multiple comparisons test (**** P < 0.0001).", "answer": "cell_type: None organism: None tissue: endosperm, seed, seeds cell_line: None subcellular: nuclei" }, { "caption": "A. DIC images of abnormal embryo sacs in cycb1 mutant combinations. Red arrowheads indicate the visible nuclei in Col-0 embryo sacs (central and egg cells) and the corresponding structures in the quadruple cycb1;1-/- cycb1;2+/- cycb1;3+/- cyb1;4- mutant. Scale bars: 20 μm. B. Quantification of the different abnormal embryo sac structures in cycb1 mutant combinations (n = 202-459 embryo sacs per genotype). Different letters indicate significant differences in the proportion of abnormal embryo sacs in a Chi-squared test followed by the Marascuilo procedure to identify significant pairwise comparisons. WT = wildtype.", "answer": "cell_type: None organism: None tissue: embryo sac, embryo sacs, central, egg cells cell_line: None subcellular: nuclei" }, { "caption": "C. DIC images of embryo sacs 3 DAP with wildtype pollen (female x male). Red arrowheads indicate the visible embryo sac nuclei in the crosses with the quadruple cycb1;1-/- cycb1;2+/- cycb1;3+/- cyb1;4- mutant as a female donor, while the control Col-0 x Col-0 cross exhibits a developing embryo. Scale bars: 20 μm. D. Quantification of seed abortion in different cycb1 mutant combinations. Graph represents the average seed abortion rate per plant ± SD of three biological replicates, n = 463-579 seeds analyzed per genotype. Asterisks indicate significant differences in seed abortion rate in an ordinary one-way ANOVA test, followed by a Dunnett's multiple comparisons test (**** P < 0.0001).", "answer": "cell_type: None organism: None tissue: embryo, embryo sac, embryo sacs, pollen, seed cell_line: None subcellular: nuclei" }, { "caption": "A, B. DAPI staining of pollen in cycb1 mutants, including pollen configurations found in cycb1;1-/- cycb1;2+/- cycb1;3+/- cycb1;4-/- mutants (B). Scale bars: 5 μm. C. Quantification of DAPI-stained pollen configurations in different cycb1 mutant combinations, n = 420-616 pollen grains per genotype. Different letters indicate significant differences in the proportion of abnormal pollen (uni- and bicellular) in a Chi-squared test followed by the Marascuilo procedure to identify significant pairwise comparisons.", "answer": "cell_type: None organism: None tissue: pollen, pollen grains cell_line: None subcellular: None" }, { "caption": "D. Alexander staining of mature pollen indicating pollen viability. Scale bars: 5 μm. E. Quantification of Alexander-stained pollen viability, n = 403-498 pollen grains per genotype. Different letters indicate significant differences in the proportion of dead pollen in a Chi-squared test followed by the Marascuilo procedure to identify significant pairwise comparisons.", "answer": "cell_type: None organism: None tissue: pollen, pollen grains cell_line: None subcellular: None" }, { "caption": "A, B, C. Co-immunolocalization against tubulin (magenta) and KNOLLE (green) in root meristematic cells. Nuclei were counterstained with DAPI for the DNA (cyan). White arrowheads indicate laggards in the metaphase stage. Scale bars: 5 μm.", "answer": "cell_type: None organism: None tissue: meristematic cells, root cell_line: None subcellular: laggards, Nuclei" }, { "caption": "D. Quantification of wildtype (WT), double and misplaced PPBs. Different letters indicate significant differences in the proportions of the different arrays per category in a Chi-squared test followed by the Marascuilo procedure to identify significant pairwise comparisons. Ten roots were analyzed per genotype. E. Quantification of PPBs with prominent perinuclear microtubules (MTs). Boxes and whiskers represent min to max values with the median indicated as a central horizontal line, n = 10 roots per genotype. Asterisks show significant differences in the percentage of PPBs with prominent perinuclear microtubules per root in an ANOVA test followed by Dunnett's multiple comparisons test (** P < 0.01 and **** P < 0.0001). F. Quantification of spindles with lagging chromosomes. Boxes and whiskers represent min to max values with the median indicated as a central horizontal line, n = 10 roots per genotype. Asterisks show significant differences in the percentage of spindles with lagging chromosomes per root in a Kruskal-Wallis test followed by Dunn's multiple comparisons test (** P < 0.01 and ns = non-significant).", "answer": "cell_type: None organism: None tissue: root, roots cell_line: None subcellular: chromosomes, microtubules, MTs, perinuclear, PPBs, spindles" }, { "caption": "A. Co-immunolocalization against tubulin (magenta) and KNOLLE (green) in root meristematic cells. Nuclei were counterstained with DAPI for the DNA (cyan). Scale bars: 5 μm. B. Quantification of wildtype (WT) and abnormal phragmoplasts. Different letters indicate significant differences in the proportions of the different arrays per category in a Chi-squared test followed by the Marascuilo procedure to identify significant pairwise comparisons. Ten roots were analyzed per genotype. C. Quantification of the different mitotic stages in roots of the different genotypes. Different letters indicate significant differences in the proportions of the different arrays per category in a Chi-squared test followed by the Marascuilo procedure to identify significant pairwise comparisons. Ten roots were analyzed per genotype.", "answer": "cell_type: None organism: None tissue: meristematic cells, root, roots cell_line: None subcellular: Nuclei, phragmoplasts" }, { "caption": "D. Time-lapse of confocal microscope pictures of root meristematic cells tagged with GFP-GIP1 in Col-0 (top panel) and cycb1;1 cycb1;2 (bottom panel). GIP1 localizes at the nuclear polar caps, followed by co-localization with microtubules at the spindle and phragmoplast arrays. In cycb1;1 cycb1;2 double mutants, GIP1 exhibited an abnormal localization, being found at the spindle (magenta arrowheads) and phragmoplast (white arrowheads) midzones, which are normally devoid of the protein. Scale bars: 5 μm.", "answer": "cell_type: None organism: None tissue: meristematic cells, root cell_line: None subcellular: microtubules, nuclear, phragmoplast, spindle" }, { "caption": "(A) BMDMs were treated with E. coli (MOI=100) for 30 minutes and further cultured for various length of time as indicated. The dynamic of ENT3 expression was determined by measuring Slc29a3 transcripts via RT-qPCR. (B) Phagocytosis inhibitor, Cytochalasin D (CytoD), pretreated BMDMs were incubated with E. coli (MOI=100) and subjected for Slc29a3 expression analysis via RT-qPCR 6 hours post-infection. Data information: The expression level was calculated relative to Rpl19 and normalized to untreated group as 1. The results shown are combined from three biological replicates (n=3), unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: E. coli tissue: None cell_line: None subcellular: None" }, { "caption": "(D) Different bacterial components were applied as stimulants to BMDMs. Slc29a3 expression was analyzed after 30 minutes of stimulation and a total of 6 hours incubation. (E) BMDMs were treated with different doses of LPS for 30 minutes, harvested 6 hours post-stimulation, and subjected for RT-qPCR analysis. Data information: The expression level was calculated relative to Rpl19 and normalized to untreated group as 1. The results shown are combined from three biological replicates (n=3), unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: None tissue: None cell_line: None subcellular: None" }, { "caption": "(C) WT or (D) MyD88-/- BMDMs were stimulated with 10 ng/ml LPS or live E. coli (MOI=100) in the presence of 10 µM TBK inhibitor, MRT 67307, and analyzed for Slc29a3 expression. Data information: The results shown are combined from three biological replicates (n=3), unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: E. coli tissue: None cell_line: None subcellular: None" }, { "caption": "(E) The 10 ng/ml LPS-treated BMDMs were examined for Ifnb1 expression after 30 minutes of stimulation and a total of 6 hours incubation. Data information: The results shown are combined from three biological replicates (n=3), unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: None tissue: None cell_line: None subcellular: None" }, { "caption": "(F) BMDMs were treated with 100 U/ml of IFN-β for various length of time and subjected for Slc29a3 expression. Data information: The results shown are combined from three biological replicates (n=3), unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: None tissue: None cell_line: None subcellular: None" }, { "caption": "(B-E) BMDMs from WT, IFNAR1-/- (B), or STAT1-/- (C) mice were treated with 10 ng/ml LPS, live E. coli (MOI=100), or 100 U/ml IFN-β, harvested and examined for Slc29a3 induction. BMDMs from WT, IFNAR1-/- (D) or STAT1-/- (E) mice were treated with 100 U/ml IFN-β, 50 µg/ml poly(I:C), or EMCV (MOI=10), harvested and examined for Slc29a3 induction. Data information: The expression level was calculated relative to Rpl19 and normalized to untreated group as 1. The results shown in B to E are from three biological replicates (n=3) Unpaired two-tailed Student's t-test was used for statistical analysis, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: EMCV, E. coli, mice tissue: None cell_line: None subcellular: None" }, { "caption": "(F-H) The expression dynamic of Slc29a3 was profiled in BMDMs treated with two different doses of IFN-α (F), IFN-β (G), IFN-γ (H) for various length of time as indicated. Data information: The expression level was calculated relative to Rpl19 and normalized to untreated group as 1. The results shown in F to H from two biological replicates (n=2). Unpaired two-tailed Student's t-test was used for statistical analysis, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: None tissue: None cell_line: None subcellular: None" }, { "caption": "(A) The induction fold change (treated/untreated) of Slc29a3 and selected ISG transcripts were curated from INTERFEROME database. Shown is data extracted from 250 IU/ml IFN-β treated BMDMs. Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: None tissue: None cell_line: None subcellular: None" }, { "caption": "(D-F) Primers targeting 3' flanking region 2 (D), 3' flanking region 1 (E), and promoter region (F) were used to quantify the STAT1 binding in BMDMs upon 100 U/ml IFN-β after 4 hour stimulation via qChIP assay. Data information: The results in D-F were generated from two biological replicates (n=2) with four technical repeats each (n=4). One representative example is shown. Unpaired two-tailed Student's t-test was used for statistical analysis, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: None tissue: None cell_line: None subcellular: None" }, { "caption": "(A-C) (A) BMDMs were infected with EMCV (MOI=10) and harvested at indicated time points. (B) THP-1 derived macrophages were challenged with EV71 (MOI=5) and collected at different time points. (C) BMDMs were co-cultured with 50 µg/ml poly (I:C) with various length of time and harvested. The mRNA expression of Slc29a3 or SLC29A3 was measured by RT-qPCR. The expression level was calculated relative to Rpl19 or RPLP0 and normalized to untreated group at time 0 as 1. Results are combined from three biological replicates (n=3) Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs, macrophages organism: EMCV, EV71 tissue: None cell_line: THP-1 subcellular: None" }, { "caption": "(D, E) ENT3fl/fl and Cx3cr1cre/+ENT3fl/fl mice (n=12) were challenged with EMCV (104 PFU, i.p.) and monitored for the survival (D) and disease severity (E) for two weeks. Survival results were analyzed by log-rank (Mantel-Cox) test, *p < 0.05. Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: None organism: EMCV, mice tissue: None cell_line: None subcellular: None" }, { "caption": "(F, G) ENT3fl/fl and Cx3cr1cre/+ENT3fl/fl mice were challenged with 107 PFU EMCV and measured the viral titer in the brain at post-infection day 3 by plaque assay (n=6). Shown are representative plaque assay images (F) and the quantification (G). Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: None organism: EMCV, mice tissue: brain cell_line: None subcellular: None" }, { "caption": "(A) WT and ENT3-/- BMDMs were infected with EMCV (MOI=10), and the culture supernatants were harvested 24 hours post-infection to measure the production of IFN-α, IFN-β, and IFN-γ by ELISA. Shown are combined results from three biological replicates (n=3). Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, ***p < 0.001. n.s. no significance. The combined data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: EMCV tissue: None cell_line: None subcellular: None" }, { "caption": "(D, E) The mitochondrial respiratory capacity (D) and glycolysis capacity (E) of WT and ENT3-/- BMDMs treated with 1000 U/ml IFN-β for 6 hours were measured by extracellular flux analysis. Shown are the representative results of OCR and ECAR kinetics from six biological replicates (n=6). Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, ***p < 0.001. n.s. no significance. The combined data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: None tissue: None cell_line: None subcellular: mitochondrial" }, { "caption": "(G, H) The replication of EMCV in WT (G) and ENT3-/- BMDMs (H) were evaluated in the presence of exogenous 1 or 10 µM of ribonucleosides (A, U, C, G) 9 hours post-infection (MOI=10). The expression of EMCV-2A2B was determined by RT-qPCR. Shown are results from three to four biological replicates (n=3-4). Data information: In G, H) the EMCV-2A2B expression level was calculated relative to Rpl19 and normalized to untreated group at time 0 as 1. Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, ***p < 0.001. n.s. no significance. The combined data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: EMCV tissue: None cell_line: None subcellular: None" }, { "caption": "(A) Illustration of strategy to track the viral uncoating upon infection. (B-D) (B) WT and ENT3-/- BMDMs were infected with Syto82-labeled EMCV (MOI=1) and subjected to live imagining 30, 60 and 90 minutes post-infection. The arrowheads indicated the Syto82+ virus puncta in the cell. Scale bars represent 10 µm. (C) Quantification of Syto82 signal in BMDMs after 60 minutes was performed by enumerating Syto82+ cells (%) and (D) the mean fluorescent intensity (MFI) per Syto82+ cell (D). Results were generated from images of three biological replicates (n=3), each with 4 fields analyzed. Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: EMCV tissue: None cell_line: None subcellular: None" }, { "caption": "(E) WT and ENT3-/- BMDMs were infected with Syto82-labeled EMCV (MOI=1) and co-stained with 100 nM Lysotracker Green, subjected to live imagining 60 minutes post-infection. Data were the representative images of two biological replicates (n=2). Scale bars represent 5 µm. (F) WT and ENT3-/- BMDMs were infected with EMCV (MOI=10) for 2 hours and then enriched the endosomes and lysosomes. EMCV particles in endosome- or lysosome-enriched fractions were quantified by plaque assay. Shown are combined results from three biological replicates (n=3). Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: BMDMs organism: EMCV tissue: None cell_line: None subcellular: endosome, endosomes, lysosome, lysosomes" }, { "caption": "(G-K) (G) Calu-3 cells were infected with SARS-CoV-2 original strain or delta variant at MOI=0.1 for 48 hours, harvested, and examined for SLC29A3 induction. (H) ENT3 knockdown in Calu-3 cells was performed by lentiviral shRNA system. The knockdown efficiency was confirmed by RT-qPCR. ENT3 knockdown Calu-3 cells were infected with SARS-CoV-2 delta variant and subjected for the viral replication analysis 24 hours post-infection. The virus released out of cells was measured by plaque assay (I), and the viral titer in the cells was measured by RT-qPCR (J). (K) The replication of SARS-CoV-2 delta variant in scramble and ENT3 knockdown Calu-3 cells were evaluated in the presence of exogenous 1 or 10 µM of ribonucleosides (A, U, C, G) 24 hours post-infection (MOI=0.1). The SLC29A3 expression level was calculated relative to RPLP0 and normalized to control as 1. The SARS-CoV-2 E gene expression level was calculated relative to RPLP0 to normalize the cell number. Shown are combined results from three biological replicates (n=3). Data information: Unpaired two-tailed Student's t-test was used for statistical analysis, *p < 0.05, **p < 0.01, ***p < 0.001, n.s. no significance. Data are shown as mean ± SEM.", "answer": "cell_type: None organism: delta, SARS-CoV-2 delta, lentiviral, SARS-CoV-2 tissue: None cell_line: Calu-3 subcellular: None" }, { "caption": "B RT-PCR analysis of RNA from mid-temporal autopsy brain sections obtained from NCI, MCI or AD subjects. Representative gel of results is shown.C Quantitation of RT-PCR products of all samples analyzed from post-mortem brain tissues (mean s.e.m.). An omnibus significant effect was obtained using the one-way analysis of variance (one-way ANOVA) with Tukey post-test to determine the p-value. Error bars are s.e.m.", "answer": "cell_type: None organism: subjects tissue: brain cell_line: None subcellular: None" }, { "caption": "D RT-PCR analysis of RNA from the hippocampus of 1-2 and 3-7 month old non-transgenic (WT) or TgCRND8 (AD) mice.E Quantification of the relative ratio of exon 19 inclusion for TgCRND8 (AD) and WT mice (mean s.e.m.; one-way ANOVA with Tukey post-test). The number of samples analyzed (n) is indicated.", "answer": "cell_type: None organism: mice, TgCRND8 tissue: hippocampus cell_line: None subcellular: None" }, { "caption": "B Top, diagram of ASOs tested below, mapped to their position of complementarity on ApoER2. Bottom, RT-PCR of RNA isolated from HeLa cells transfected with the indicated ASO at a final concentration of 80 nM. RNA spliced forms are labeled. Quantification of the percentage inclusion is shown below the image and calculated as: Inclusion (%)=[exon 19 included/(exon 19 included+exon 19 skipped)] x 100.", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "D Top, RT-PCR analysis of ApoER2 exon 19 splicing in HeLa cells depleted of SRSF1 using an SRSF1-specific siRNA. Control is a non-specific siRNA. Bottom, Immunoblot analysis of SRSF1 from HeLa lysates depleted of SRSF1. β-actin is included as a control.E Quantification of exon 19 splicing in (D). Error bars show s.e.m. P-value was determined using Student's two-tailed t-test.", "answer": "cell_type: None organism: None tissue: None cell_line: HeLa subcellular: None" }, { "caption": "F Top, RT-PCR analysis of exon 19 splicing in a primary mouse kidney cell line depleted of SRSF1 by RNAi. Control is a non-specific siRNA. Bottom, Immunoblot analysis of SRSF1 from HeLa lysates depleted of SRSF1. β-actin is included as a control.G Quantification of exon 19 splicing in E. Error bars show s.e.m. P-value was calculated using Student's two-tailed t-test.", "answer": "cell_type: kidney cell organism: mouse tissue: None cell_line: HeLa subcellular: None" }, { "caption": "A Top, ASOs mapped onto the mouse ApoER2 exon 19 gene region. Bottom, RT-PCR of RNA isolated from mouse cells transfected with different ASOs. Quantification of percent exon 19 inclusion is shown below the gel image.", "answer": "cell_type: None organism: mouse tissue: None cell_line: None subcellular: None" }, { "caption": "B ASO improves exon 19 inclusion in a dose-responsive manner. RT-PCR analysis of RNA from mouse cells transfected with increasing doses of ASO-15. The percent inclusion of exon 19 is shown below the gel image. The half-maximal effective concentration (EC50) was calculated using GraphPad Prism version 6.0 (GraphPad Software, San Diego, CA) after fitting the data using nonlinear regression with normalized response and variable slope.", "answer": "cell_type: None organism: mouse tissue: None cell_line: None subcellular: None" }, { "caption": "D RT-PCR analysis of RNA isolated from the hippocampus of mice treated as adults by ICV injection of indicated ASOs. C refers to a non-specific control ASO.E Quantitation of ApoER2 exon 19 inclusion from D (mean s.e.m., one-way ANOVA with Bonferroni multiple comparison test.", "answer": "cell_type: None organism: mice tissue: hippocampus cell_line: None subcellular: None" }, { "caption": "A RT-PCR analysis of ApoER2 exon 19 splicing in RNA isolated from hippocampus of 4 month old AD and WT mice treated with ASO-21 or ASO-C at P1-2.B Quantitation of exon 19 splicing. (mean s.e.m.; Kruskal-Wallis test with Dunn's multiple comparison test.", "answer": "cell_type: None organism: mice tissue: hippocampus cell_line: None subcellular: None" }, { "caption": "A Input-output curves show hippocampal CA1 field excitatory postsynaptic potential (fEPSP) response amplitudes as a function of stimulus intensity delivered to Schaffer collateral afferent fibers. Two-way repeated-measures ANOVA revealed a significant effect of treatment (F(2,119) = 31.62, p < 0.0001) with the Bonferroni multiple comparisons test showing significant differences between ASO-C treated AD and age-matched ASO-C treated WT (* p < 0.05). Responses from ASO-21 treated AD mice were not significantly different from ASO-C treated WT or AD mice.", "answer": "cell_type: None organism: mice tissue: hippocampal CA1 field cell_line: None subcellular: Schaffer collateral afferent fibers" }, { "caption": "B Representative paired-pulse facilitation (PPF) responses from ASO-C treated WT (top), ASO-C treated AD (middle) and ASO-21 treated AD (bottom) mice are shown to the left. Scale bars = 0.2 mV by 10 msec apply to all traces. Bar graph (right) summarizes the paired-pulse ratios. PPF was not significantly different in AD compared to WT samples, nor was it affected by ASO-21 treatment.", "answer": "cell_type: None organism: mice tissue: None cell_line: None subcellular: None" } ]