EMBO/SourceData huggingface dataset:
Figure 7A P240 PR-SET7ΔHepA liver sections were double-stained with A6 and Sox9 (upper panel) or CD133 and Sox9 (lower panel). Pie charts at the right represent average percentages of cells stained positively with the indicated markers after counting DAPI-stained cells in 5 high-power fields (HPF) in liver sections of 3 different mice.B Cell duplication rate of primary hepatocytes from P240 PR-SET7ΔHepA livers in culture.C Pictures of representative subcutaneous xenograft tumors dissected from immunodeficient mice 20 days after injection with primary hepatocytes from P240 PR-SET7ΔHepA livers or Hepa 1-6 cells. Right panel shows average tumor volumes (n = 3) dissected at the indicated time points following injection.D, E Hematoxylin and eosin and immunohistological staining with A6, HNF4, Sox9 and CD133 antibodies of tumor sections from xenografts dissected 20 or 30 days after injection with primary hepatocytes from P240 PR-SET7ΔHepA livers.
Figure 1B. T6SS secretion assay of A. tumefaciens strains: wild type C58, various mutants lacking one, two, or three toxin-immunity gene pairs, and a mutant lacking tssL.C. T6SS secretion assay of various A. tumefaciens strains: wild type C58, ΔtssL, the tde double deletion mutant (Δtdei) containing pRL662 and pTrc200 empty vector (V) only or expression of pTdei1 (tde1-tdi1 expressed from pTrc200), pTde2* (catalytic site mutated tde2 expressed on pRL662), or pTdei1+ pTde2*.D. A. tumefaciens antibacterial activity assay against E. coli. The strains of A. tumefaciens were co-cultured at a ratio of 30:1 with E. coli DH10B (+ pRL662) on LB agar. The survival of target E. coli cells was quantified by counting CFUs on gentamicin-containing LB agar plates. Data represent mean ± SEM of 6 biological replicates from three independent experiments. One-way ANOVA followed by Turkey HSD test was used for statistical analysis. Two groups with significant differences (P=0.0010053) are indicated with different letters (a and b).
Figure 2A. T6SS secretion assay of A. tumefaciens strains: wild type C58, ΔtssL, Δtap-1, and Δatu3641 harboring a pTrc200 vector (V) or derivatives pTap-1 (tap-1 expressed from pTrc200), or p3641 (atu3641 expressed from pTrc200).B. T6SS secretion assay of A. tumefaciens C58 Δtap-1Δatu3641 containing an empty pTrc200 vector (V) or its derivatives expressing tap-1, atu3641, tde1-tdi1, or tde2-tdi2.C. T6SS secretion assay of A. tumefaciens C58ΔG2op mutant encoding full-length or truncated VgrG1 proteins.
Figure 3A. Representative images of cells of A. tumefaciens C58 strains ΔtssB, ΔtssLΔtssB, and ΔtdeiΔtssB cells each expressing TssB-GFP from pTrc200. Upper panel: phase contrast images; Lower panel: green fluorescence images. Examples of GFP streaks were indicated by white arrowheads. Scale bar: 2 μm.B. Quantification of TssB-GFP foci in different genetic background. The number of the fluorescent foci were counted using the "analysis particle" function in Fiji with a manually set threshold. The number of cells were counted manually. For each strain, a total of three images were obtained from one independent experiment and each image contained more than 300 cells for quantification and statistical analysis. One-way ANOVA followed by Turkey HSD test was used for statistical analysis. Data are mean ± SEM and two groups with significant differences (P=0.000272) are indicated with different letters (a and b). Similar results are reproduced in two independent experiments.C. Western blots of the isolated sheaths, which were prepared via ultracentrifugation of cell lysates from A. tumefaciens C58 wild type, ΔtssL, and Δtdei. T: total proteins from the cell lysate. P: pellet samples containing TssBC sheaths after ultracentrifugation. S: supernatant after ultracentrifugation. Proteins were analyzed in western blots probed with indicated antibodies. Fha serves as a cytoplasmic control. Molecular weight markers (in kDa) are indicated on the left. Similar results were obtained from at least two independent experiments. Data are from one independent experiment and reproduced in at least two independent experiments.D. Pellet samples of wild type and Δtdei were visualized with transmission electron microscopy (TEM). Sheaths are indicated by red arrowheads and flagella, which are distinguishable on the basis of smoother, more solid, and thinner structures (~13 nm in width), are indicated by green arrowheads [33]. Data are from one independent experiment and reproduced in at least two independent experiments. Scale bar: 0.5 μm (upper panel), 100 nm (upper panel).
Figure 4B. Secretion assay of wild type and various mutants of 12D1, 1D1108 and 15955.C. Antibacterial activity assay of wild type and mutants of 12D1, 1D1108 and 15955 was carried out in a ratio of 30:1 against E. coli harboring the plasmid pRL662. The target E. coli cells were serially-diluted and grown overnight on gentamicin-containing LB agar prior to photographing. Each competition was done at least four times and reproduced in three independent experiments.D. Secretion assay of wild type 12D1, ΔtssL, Δv1, Δv3-4 containing pRL662 empty vector (V) or its derivatives with v1 or v3-4 were analyzed for secretion.E. Secretion assay of wild type 1D1108, ΔtssL, Δv4, Δv6 containing pRL662 empty vector (V) or its derivatives with v4 or v6.
Figure 5A. T6SS secretion assay of A. tumefaciens wild type C58, ΔtssL, and various single, double, and triple toxin-immunity deletion strains.B. T6SS secretion assay of A. tumefaciens wild type C58, ΔtssL, Δtdei, and Δ3TIs harboring the indicated plasmids.
Figure 6A. T6SS secretion assay of A. tumefaciens 12D1 wild type, ΔtssL, and various toxin-immunity deletion strains.B. T6SS secretion assay of A. tumefaciens 12D1 wild type, ΔtssL, and various toxin-immunity deletion strains harboring the indicated plasmids.C. Antibacterial activity assay of A. tumefaciens 12D1 wild type, ΔtssL, and various toxin-immunity deletion strains harboring the indicated plasmids was carried out in a ratio of 30:1 against E. coli harboring the plasmid pRL662. The target E. coli cells were serially-diluted and grown overnight on gentamicin-containing LB agar prior to photographing. Each competition was done at least four times and reproduced in two independent experiments.D. T6SS secretion assay of A. tumefaciens C58 wild type, ΔtssL, and various mutant strains.
figf1(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).(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).(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).(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.(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.(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).(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.(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).
figf2(a) Intracellular spermidine of five-day-oldΔspe1 cells, compared with wild-type cells. Data represent means ± s.e.m. (n = 3; *P 0.001).(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.(c) Fluorescence microscopy of DHE→Eth conversion in wild-type and Δspe1 cells indicating ROS production. Scale bars, 10 μm.(d) Quantification (FACS analysis) of ROS accumulation using DHE→Eth conversion of wild-type (WT) and Δspe1 cells with and without supplementation of low doses of spermidine. Data represent means ± s.e.m. (n = 4; *P 0.001).(e) Quantification (FACS analysis) of phosphatidylserine externalization and loss of membrane integrity using annexin V/PI co-staining (at day 5) and of DNA fragmentation using TUNEL staining (at day 3) of chronologically ageing wild-type (WT) and Δspe1 cells with or without supplementation of 0.1 mM spermidine as indicated. Data represent means ± s.e.m. (n = 3; *P 0.001).
figf3(a) Fluorescence microscopy of DHE→Eth conversion and annexin V (green)/PI (red) co-staining of wild-type cells at day 18 of the chronological ageing experiment shown in Fig. 1b. Scale bars, 10 μm. (b, c) Quantification of DHE→Eth conversion (b) and annexin V/PI co-staining (c) using FACS analysis performed at indicated time-points of the chronological ageing experiment shown in Fig. 1b. Data represent means ± s.e.m. (n = 3; *P 0.001).(d) Electron microscopy of young log-phase cells (day 0) and of 20-day-old wild-type cells aged without (control) or with spermidine (4 mM). Representative cells are shown (for an overview see Supplementary Information, Fig. S3c).(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.
figf4(a) Relative acetylation (normalized to controls at each day) of indicated histone H3 Lys residues determined by quantification of immunoblot analysis. A representative blot using site specific antibodies is shown in b. Data represent means ± s.e.m. (n = 3). Serial dilutions of protein extracts were applied in western blots to verify linearity before quantification (examples are shown in Supplementary Information, Fig. S4). For calculation details see section on Methods. P values indicate the result of a two-factor ANOVA corrected by Bonferroni post hoc test. (b) Immunoblot of whole-cell extracts of wild-type cells chronologically aged to designated time-points with (+) or without (−) spermidine application. Blots were probed with antibodies against total histone H3 or H3 acetylation sites at the indicated Lys residues. Full scans of blots are available in Supplementary Information, Fig. S5.(c) Relative acetylation (normalized to wild-type controls at each day) of indicated histone H3 Lys residues of Δspe1 cells (open bars), compared with wild-type cells (closed bars) during chronological ageing. Data represent means ± s.e.m. (n = 3). P values indicate the result of a two-factor ANOVA corrected by Bonferroni post hoc test.(d) Relative acetylation (normalized to day 1) of histone H3 Lys 18 residue of chronologically ageing wild-type cells. Data represent means ± s.e.m. (n = 3).(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.(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.
figf5(a) Relative acetylation of histone H3 Lys 9 and 14 residues determined by quantification of immunoblot analysis performed at day 20 of the ageing experiment shown in panel b. Data represent means ± s.e.m. (n = 3; *P 0.05). (b) Chronological ageing of wild-type (▪, o) and Δiki3Δsas3 (▴, ▿) with (open symbols) or without (closed symbols) addition of spermidine (4 mM) at day 1. Data represent means ± s.e.m. (n = 4). (c) Quantification (FACS analysis) of phosphatidylserine externalization and loss of membrane integrity (annexinV/PI costaining) as well as ROS production (DHE->Eth conversion) performed at day 20 of the experiment shown in b. Data represent means ± s.e.m. (n = 4; *P 0.001).(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).(g) Relative change of ATG7, ATG11 and ATG15 mRNA levels by spermidine supplementation (normalised to controls) after ten days of chronological ageing as determined by reverse transcriptase real-time PCR. Data represent means ± s.e.m. (n = 3; *P 0.05 and **P 0.01).(h) Relative histone H3 Lys 18 acetylation of indicated promoter regions normalized to the acetylation of ATG7 promoter (pATG7) determined by chromatin immunoprecipitation with H3-K18Ac specific antibody and subsequent quantification of precipitated promoter DNA using quantitative real time PCR. Signals specific for indicated promoter regions were initially compared with non-immunoprecipitated samples and afterwards normalized to the pATG7 signals. Data represent means ± s.e.m. (n = 3). The P value was calculated using a two-factor ANOVA with promoter and condition (treated and non-treated) as independent factors.
figf6(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.(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).(c) Relative alkaline phosphatase activity (ALP activity) indicative of autophagy during chronological ageing of wild-type (closed bars) and Δiki3Δsas3 (open bars) cells. Data represent means ± s.e.m. (n = 3; *P 0.01 and **P 0.001).(d) Chronological ageing of wild-type (▪, o) and Δatg7 (▴, ▿) with (open symbols) or without (closed symbols) addition of spermidine (4 mM) at day 1. Data represent means ± s.e.m. (n = 4).(e) Chronological ageing on water of wild-type (▪, o) and Δatg7 (▴, ▿) with (open symbols) or without (closed symbols) addition of spermidine (8 mM) at day 0. Data represent means ± s.e.m. (n = 4).(f) Quantification (fluorescence reader) of ROS production (DHE→Eth conversion) by wild-type and Δatg7 cells with and without supplementation of spermidine (8 mM), obtained from the ageing experiment shown in panel e. Data represent means ± s.e.m. (n = 4; *P 0.07 and **P 0.01).
figf7(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).(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.(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).(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.(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.(i) Survival of C. elegans during ageing with and without (control) supplementation of food (UV-killed E. coli) with spermidine (0.2 mM). Wild-type (N2) animals were compared with bec-1 RNAi animals deficient in autophagy induction. For mean life spans see Supplementary Information, Table S3.
Figure 1A. Measurement of oxygen consumption rate (OCR), extracellular acidification rate (ECAR) and oxidative burst of monocytes from COVID-19 patients (COVID) and healthy controls (CTR). OCR was measured in real time, under basal condition and in response to mitochondria inhibitors: oligomycin (Oligo, 2 μM), cyanide-4-(trifluoromethoxy)phenylhydrazone (FCCP, 0.5 μM), and antimycin A plus rotenone (Rot/AA, 0.5 μM). Oxidative burst was measured in response to PMA/ionomycin (PMA/Iono, 1 μg/mL). Scatter plots show the quantification of basal respiration (indicated as Basal OCR), ATP-linked respiration (ATP-linked), maximal respiration (Max Resp), proton-leak, spare respiratory capacity (Spare), oxidative burst immediate response and basal ECAR. The maximal respiration kinetic range and the oxidative burst kinetic range are also reported and were obtained by analyzing the area under the curve (AUC) from the sixth to the tenth measurement and from the tenth to the thirteenth measurement, respectively. Data represent individual values, mean and standard error of the mean (CTR, n=12; COVID, n=13). Mann-Whitney test was used for statistical analysis. Exact p values are reported in the figure. Representative traces of OCR of monocytes from COVID-19 patients (COVID) and healthy controls (CTR) are also reported.B. Representative electron micrographs of mitochondrial ultrastructural changes observed in COVID-19 monocytes. Panels "a" and "c" are representative electron micrographs of monocytes from healthy controls, whereas panels "b", "d" and "e" are representative electron micrographs of monocytes from COVID-19 patients. In panel "f" the quantification of mitochondrial area, external perimeter, Feret's diameter, aspect ratio circularity and roundness are reported (n=225 mitochondria for each group). Black arrows in panel "d" indicate mitochondria; N refers to nucleus. Exact p values are reported in panel "f".
Figure 2B. Heatmaps representing different monocyte clusters identified by FlowSOM, with percentages in healthy donors (CTR) and COVID-19 patients. The colors in the heat map represent the median of the arcsinh, 0-1 transformed marker expression calculated over cells from all the samples, varying from blue for lower expression to red for higher expression. Each cluster has a unique color assigned (bar on the left which colors correspond to those used in panel A).C. Differential analysis between healthy donors (CTR, n=8) and COVID-19 (COVID, n=7). The heatmap represents arcsine-square-root transformed cell frequencies that were subsequently normalized per cluster (rows) to mean of zero and standard deviation of one. The color of the heat varies from blue, indicating relative under-representation, to red indicating relative over-representation. Bar and numbers at the right indicate significant differentially abundant clusters (green) and adjusted p values (Differential analysis performed by diffcyt package present in the Catalyst package). The statistical analyses was done using GLMM (according to the actual guidelines) and all p-values were Bonferroni corrected. Clusters were sorted according to the adjusted p values, so that the cluster at the top shows the most significant abundance changes between the two conditions. D. Boxes and whiskers plots representing maximum, minimum, median value, 25 and 75 percentile of different subpopulations of monocytes in healthy donors (CTR, n=8) and COVID-19 patients (COVID, n=7).E. Scatter plots showing the frequency of PD-1+ cells, PD-L1+ cells among total monocytes in healthy controls (CTR, n=8) and COVID-19 patients (COVID, n=7). A scatter plot reporting the median fluorescence intensity (MFI) of PD-L1 in total monocytes is also shown. Data represent individual values, mean ± standard error of the mean. Mann-Whitney test was used for statistical analysis. Exact p values are reported in the figure.
Figure 3A. Quantification of cytokines and other mediators in plasma obtained from COVID-19 patients (COVID, n=15) and healthy controls (CTR, n=15). Data represent individual values, mean ± standard error of the mean. Mann-Whitney test was used for statistical analysis. Exact p values are reported in the figure.B. Representative dot plots showing percentages of immature and mature circulating monocytes in CTR and COVID-19 patients. Scatter plots showing the quantification of immature and mature monocytes in healthy controls (CTR, n=6) and COVID-19 patients (COVID, n=7) are reported. Mann-Whitney test was used for statistical analysis. Exact p values are reported in the figure.
Figure 3(D) A fluorescence anisotropy experiment demonstrated direct binding of the Pxp3 motif with purified Pex5 protein (Kd = 9.5 +/-2.9 µM), in strength similar to the binding of the known PTS1 motif from Idp3 (Kd = 5.5 +/- 0.5 µM). The plots represent the mean of three independent experiments, and the error bars represent the standard deviation.(F) Subcellular fractionations followed by enzymatic activity assays show that untagged, native, Glr1 is active in peroxisomes, in addition to its known activity in mitochondria. Fum1 and Pox2 were used as markers for mitochondrial, and peroxisomal fractions, respectively.(H) Yeast-2-hybrid assay shows Glr1 interacts in vivo with both Pex5 full-length and Pex5 N' domain.