EMBO/SourceData huggingface dataset:
Figure 3 The ABA-dependent regulation of the PP2Cs ABI1 (A,D,G), ABI2 (B,E,H), and HAB1 (C,F,I) by RCAR12 and RCAR13 were analyzed in yeast (A-C), Arabidopsis protoplasts (D-F), and in vitro (G-I). A-C) The analysis in yeast was conducted as mentioned in Fig. 2A except that other PP2C - RCAR combinations were used and the ABA concentrations varied as indicated. D-F) Analysis of protoplasts was performed in the ABA-deficient background aba2-1 in the presence of different exogenous ABA concentrations. The ABA response was approximately tenfold inhibited by ectopic expression of the respective PP2Cs (Tischer et al, 2017). The induction of the reporter gene is related to protoplasts without ectopic RCAR expression, and in the absence of exogenous ABA. G -I) The in vitro analysis was performed by using 50 nM PP2C and 100 nM RCAR at different ABA concentrations. Maximum inhibition of PP2C activity by ABA was set to 100%. Data information: In (A-C) each data point represents the mean ± s.d.; n = 9 biological replicates derived from three independent yeast transformants. In (D-F) data represent the mean ± s.d. of three independent transfections. In (G-I) data represent the mean ± s.d. of three replicates.
Figure 4 Expression of the SnRK2s in yeast revealed ABF2-mediated transactivation by SnRK2.1, SnRK2.4, SnRK2.5, and SnRK2.10 in addition to OST1. Inset: Immuno-detection of FLAG-tagged SnRK2s expressed in yeast. The data in (B) are normalized to control samples expressing ABF2 but no SnRK2  The active subgroup I members together with SnRK2.2 and SnRK2.3 were analyzed for differential activation of ABFs. The OST1 data shown in Fig. 1A is included for better comparison. The induction level of ABF4 relative to the empty vector control (ev) is indicated.  Analysis of the phosphorylation status in the activation loop of SnRK2s expressed in yeast. Phosphorylation occurred at serine 175 or threonine 176, and at threonine 179. The relative abundance is given as the ratio of signal intensity of phosphorylated versus non-phosphorylated peptide for OST1, SnRK2.3, and SnRK2.4 in the mass spectrometric analysis. The numbering of phosphosites corresponds to OST1.  Inhibition of OST1 and SnRK2.4 by clade A PP2Cs. The data in (G) to cells expressing inactive ABI1D177A instead of ABI1.
Figure 5A,B) ABF2-mediated reporter induction by different SnRK2s was assessed in the presence of the receptor complex RCAR11 and ABI1, and varying exogenous ABA concentrations. Data information: The ABA concentration that provides half maximum response recovery is indicated by dashed vertical lines. represent Replicates were normalized to controls without SnRK2 in (A, B) C) Maximum ABA response recovery of samples shown in (A,B) relative to the reporter activity of 0.1 mM ABA-treated yeast cells expressing SnRK2s but no ABI1. Data information: Replicates were normalized to controls without ABI1 and RCAR for each SnRK2 in (C).  D-F) Analysis of the ABA response mediated by OST1 and SnRK2.4 using the receptors RCAR1 (D), RCAR8 (E), and RCAR14 (F). Data information: The ABA concentration that provides half maximum response recovery is indicated by dashed vertical lines. The data in (D-F) are the mean ± s.e.m; n = 12, biological replicates from four independent yeast transformants for OST1 + RCAR1/RCAR8, and SnRK2.4 + RCAR8.
Figure 6FRET-FLIM analysis of GFP:OST1 or GFP:SnRK2.4 and the effect of ABI1 fused to the mCherry fluorophore in the presence of RCAR1 and ABA. GFP lifetimes were determined after transient expression of the Arabidopsis proteins in leaves of Nicotiana benthamiana.   Representative false colour images of GFP:SnRK2 lifetimes measured in leaf tissues expressing OST1 or SnRK2.4 in combination with mCherry:ABI1 and RCAR1 without exogenous ABA. The bar marks 20 µm and the nucleus (n) and cytosol (c) are indicated.    Analysis of SnRK2-ABI1 interaction as mentioned in (A) but in the presence of RCAR14 and different exogenous ABA levels. RCAR14 requires ABA for efficient displacement of SnRK2s from ABI1.   Representative GFP lifetime false colour image of the analysis shown in C) 2h after 30 µM exogenous ABA administration. Details are as described in (B).
Figure 1A) (left) t-sne plot from scRNAseq data of human organoids and cluster assignment of colonic cell populations. Red color corresponds to undifferentiated cells, light green corresponds to surface colonocytes (enterocytes). t-sne plot for selected genes from single cell RNAseq of human colon epithelial cells revealing expression of ACE2 specifically in differentiated surface colonocytes expressing KRT20 and AQP8, which also express the IFN-γ receptor IFNGR2. B) Immunofluorescence staining for ACE2 (red) and KRT20 (green) of human colon tissue section indicating ACE2 expression in surface colonocytes. Scale bar: 50 µm.C) Human colon organoids cultured in full medium (FM) condition (upper panel) or FM treated with IFN-γ (lower panel). Left: bright field images of 7-day cultured human colon organoids, scale bar: 100 µm. Right: Immunofluorescence for KRT20 (green; note increased expression upon IFN-γ treatment). Scale bar: 25 µm.D) Human colon organoids cultured in basic medium (upper panel) or additionally treated with IFN-γ (lower panel). Left: bright field images of organoids that were cultured for 4 days in basic medium and in addition for 3 days with IFN-γ (lower panel) scale bar: 100 µm. Middle: Immunofluorescence labelling for KRT20 (green) Right: Immunofluorescence labelling for E-cadherin (green) to visualize epithelial cell boundaries; insets with higher magnification indicate elongation of epithelial cells that are grown in basic medium and treated with IFN-γ. Scale bar: 25 µm.Comparison of E) KRT20, F) MUC2, G) CHGA, H) LGR5 mRNA expression in organoids grown in FM or in basic medium and either untreated or treated with IFN-γ (n=3). Data are presented as mean +/- SD ,*: p≤0.05, **: p≤0.001, ***: p≤0.0001, as determined by one-way ANOVA, followed by Tukey's multiple comparisons testACE2 mRNA expression in organoids grown in FM or in basic medium and either untreated or treated with IFN-γ (n=3). Data are presented as mean +/- SD ,*: p≤0.05, **: p≤0.001, ***: p≤0.0001, as determined by one-way ANOVA, followed by Tukey's multiple comparisons testJ) Immunofluorescence staining for ACE2 (red) and KRT20 (green) of organoids grown in full medium (upper) or basic medium (lower) and additionally treated with IFN-γ (right), indicating expression of ACE2 in differentiated enterocytes. White arrows point to ACE2. Scale bar: 10 µm
Figure 2A) Immunofluorescence for N-protein (green) 48 h after SARS-CoV-2 infection of human colon organoids cultured in full medium (upper), full medium + IFN-γ (upper right), basic medium (lower left) and basic medium + IFN-γ (lower right). Yellow arrows point to N-protein positive cells. Scale bar: 25 µm.B) qPCR data displaying the relative virus load of SARS-CoV-2 measured by viral genome quantity in full medium vs. basic medium organoids 48 h after infection and normalized to GAPDH (n=6). C) qPCR data displaying the relative virus load of SARS-CoV-2 measured by viral genome quantity in full medium vs. full medium + IFN-γ treated organoids 48 h after infection and normalized to GAPDH (n=9). D) qPCR data displaying the relative virus load of SARS-CoV-2 measured by viral genome quantity in basic medium vs. basic medium + IFN-γ treated organoids 48 h after infection and normalized to GAPDH (n=4). E) qPCR data displaying the relative virus load of SARS-CoV-2 measured by viral genome quantity in full medium + IFN-γ vs. basic medium+ IFN-γ treated organoids 48 h after infection and normalized to GAPDH (n=4). (B-E) Data are presented as mean +/- SD ,*: p≤0.05, **: p≤0.001, ***: p≤0.0001, as determined by Student's t-test F) qPCR data comparing the relative virus load of SARS-CoV-2 measured by viral genome quantity normalized to GAPDH at 24 and 48 h after infection in full medium (left) and basic medium (right) untreated or treated with IFN-γ, indicating increase in virus load in differentiated and IFN-γ treated conditions (n=8). Data are presented as mean +/- SD ,*: p≤0.05, **: p≤0.001, ***: p≤0.0001, as determined by one-way ANOVA, followed by Tukey's multiple comparisons testG) Electron microscopy imaging of organoids grown in basic medium, pretreated with IFN-γ for 3 days and infected for 48 h with SARS-CoV-2. Upper: Overview showing large virus-loaded vesicles in an epithelial cell. Scale bar: 500nm. Lower: Disintegrated organoid cell containing high virus load, scale bar: 2.5µm, higher magnification to visualize virus particles, scale bar: 100nm.H) Immunofluorescence for cleaved-caspase3 (red) and E-cadherin (green) 48 h after SARS-CoV-2 infection of human colon organoids cultured in full medium (upper), full medium + IFN-γ (upper right), basic medium (lower left) and basic medium + IFN-γ (lower right). Scale bar: 50 µm. (below) Quantification of apoptotic cells, indicating increased cell death in the differentiated and IFN-γ treated condition after SARS-CoV-2 infection (n=7). Data are presented as mean +/- SD ,*: p≤0.05, **: p≤0.001, ***: p≤0.0001, as determined by one-way ANOVA, followed by Tukey's multiple comparisons test
Figure 3C) Analysis of discordance and concordance of transcriptomic responses (DISCO) between untreated vs. SARS-CoV-2 infected and untreated vs IFN-γ treated organoids. The 50 most regulated genes are highlighted; grey: discordant and black: concordant.D) Relative expression of selected enterocyte-specific genes upon SARS-CoV-2 infection, normalized to GAPDH. Differences in gene expression were assessed using the linear model 'lmFit' and 'makeContrasts' in limma.E) Immunofluorescence for KRT20 (green) in human colon organoids cultured in basic medium and either non-infected (left) or 48 h after SARS-CoV-2 infection (right), indicating a strong increase in KRT20 expression after viral infection. Scale bar: 50 µm. Quantification of fluorescence intensity below (n=8). Data are presented as mean +/- SD ,****: p≤0.0001, as determined by Student's t-testF) qPCR data displaying the increase of INF-γ target genes (CXCL11, IFIT3) (upper) and enterocyte marker genes (KRT20, ACE2) (lower) after SARS-CoV-2 infection, validating the results from the microarray analysis (n=3). Data are presented as mean +/- SD ,****: p≤0.0001, as determined by Student's t-test
Figure 1Montages of representative DAPI-stained nuclei are shown for gene knockdowns that led to reduced nuclear size. Cell-to-cell variability in the amount of ELYS knockdown likely accounts for apparent nuclear size variability. Ten nuclei per column, organized by maximum nuclear size z-score. Scale bar, 25 µm. Median nuclear size z-scores are plotted for gene knockdowns that led to reduced nuclear size. Data are based on three different siRNA oligo sequences for each gene and two biological replicates. Error bars represent the SEM for biological replicates.
Figure 2MCF-10AT1k.cl2 cells were transfected with control or ELYS siRNA. (A) Representative images of cells stained for lamin B2 and B1 are shown. (B) Representative images of cells stained for lamin A/C and B1 are shown. (C) For each experiment, nuclear lamin B1, B2, and A/C staining intensities were quantified for 44-159 nuclei per condition (96 nuclei on average) and normalized to the negative control. Three biological replicates, data from one representative experiment shown. (D) Representative images of cells stained for FG-Nups (mAb414) and lamin B1 are shown. (E) Representative images of cells stained for Nup133 and lamin B1 are shown. (F) For each experiment, nuclear mAb414 and Nup133 staining intensities were quantified for 31-83 nuclei per condition (60 nuclei on average) and normalized to the negative control. To measure NPC densities, confocal NE surface images were acquired for mAb414 and Nup133 stained nuclei. NPC numbers were counted per unit area for 18-50 nuclei per condition (30 nuclei on average) and normalized to the negative control. Two biological replicates, data from one representative experiment shown.MCF-10AT1k.cl2 cells were transfected with control or ELYS siRNA. Representative images of cells stained for Ran and lamin B1 are shown. (H) Representative images of cells stained for NTF2 and lamin A/C are shown. (I) Nuclear Ran and NTF2 staining intensities were quantified and normalized to the negative control. To measure the N/C staining intensity ratio of a given cell, the average fluorescence intensity of a nuclear region was divided by the average fluorescence intensity of a cytoplasmic region. For each experiment, 54-216 nuclei were quantified per condition (112 nuclei on average). Two biological replicates, data from one representative experiment shown.
Figure 3MCF-10AT1k.cl2 cells were co-transfected with control or ELYS siRNA and plasmids expressing eGFP alone or siRNA-resistant eGFP-ELYS. Cell lysates were analyzed by western blot and probed for ELYS and tubulin. ELYS band intensity was normalized to tubulin and then normalized to the eGFP/negative siRNA control. ELYS concentrations are indicated in the row labeled [ELYS] (average ± SD). Quantification was performed on two biological replicates. Cells were stained with an antibody against lamin B1. Representative images are shown. (B) For each experiment, nuclear cross-sectional areas were quantified for 68-298 nuclei per condition (162 nuclei on average) and averaged. Three biological replicates, data from one representative experiment shown. (C) For each experiment, nuclear lamin B2 staining intensities were quantified for 29-81 nuclei per condition (60 nuclei on average) and normalized to the eGFP/negative siRNA control. Two biological replicates, data from one representative experiment shown.Cells with and without cytoplasmic lamin B2 aggregates were counted and the percentage of cells with aggregates was calculated. For each experiment, 58-299 cells were examined per condition. Three biological replicates, data from one representative experiment shown.Cells were stained with antibodies against Ran and NTF2. For each experiment, 62-130 nuclei were quantified per condition (92 nuclei on average). Two biological replicates, data from one representative experiment shown. (E) Nuclear Ran and NTF2 staining intensities were quantified and normalized to the eGFP control. (F) To measure the N/C staining intensity ratio of a given cell, the average fluorescence intensity of a nuclear region was divided by the average fluorescence intensity of a cytoplasmic region.Transfections were performed as in (A) and cells were stained with an antibody against FG-Nups (mAb414) and Nup133. Representative images for mAb414 staining are shown. Confocal imaging was performed through nuclear cross-sections as well as on the surface of nuclei. (H) To measure NPC densities, confocal NE surface images were acquired for mAb414 and Nup133 stained nuclei. NPC numbers were counted per unit area for 25-116 nuclei per condition (53 nuclei on average) and normalized to the negative control. Two biological replicates, data from one representative experiment shown.
Figure 4MCF-10AT1k.cl2 cells were co-transfected with control or ELYS siRNA and plasmids expressing mCherry alone or mCherry-importin α. Cells were stained with an antibody against lamin B2. Representative images are shown. Scale bar, 10 µm. (B) For each experiment, nuclear cross-sectional areas were quantified for 30-172 nuclei per condition (84 nuclei on average) and averaged. Two biological replicates, data from one representative experiment shown.Cells with and without cytoplasmic lamin B2 aggregates were counted and the percentage of cells with aggregates was calculated. For each experiment, 74-218 cells were examined per condition. Two biological replicates, data from one representative experiment shown.For each experiment, nuclear lamin B2 staining intensities were quantified for 34-187 nuclei per condition (85 nuclei on average) and normalized to the mCherry/negative siRNA control. To measure bulk import capacity for importin α/β cargos, cells were co-transfected as in (A) along with a plasmid expressing GFP-3x SV40 NLS. For each experiment, nuclear GFP-NLS intensities were quantified for 22-188 nuclei per condition (73 nuclei on average) and normalized to the mCherry/negative siRNA control. Two biological replicates, data from one representative experiment shown.
Figure 5MCF-10AT1k.cl2 cells were transfected with plasmids expressing mCherry alone or mCherry-RanQ69L and stained with an antibody against lamin B2. Representative images are shown.MCF-10AT1k.cl2 cells were treated with 20 µM importazole or an equivalent volume of DMSO as a control for 24 hours and stained with an antibody against lamin B1. Representative images are shown.For each experiment, nuclear cross-sectional areas were quantified for 32-271 nuclei per condition (123 nuclei on average) and averaged. Three biological replicates, data from one representative experiment shown.To measure bulk import capacity for importin α/β cargos, experiments were performed as in (A-B) except that cells were also transfected with a plasmid expressing GFP-3x SV40 NLS. For each experiment, nuclear GFP-NLS intensities were quantified for 11-75 nuclei per condition (35 nuclei on average) and normalized to the appropriate control. Two biological replicates, data from one representative experiment shown.Cells with and without cytoplasmic lamin B aggregates were counted and the percentage of cells with aggregates was calculated. For each experiment, 31-130 cells were examined per condition. Three biological replicates, data from one representative experiment shown.
Figure 6Cell lysates from control and XPO1 siRNA transfected MCF-10AT1k.cl2 cells were analyzed by western blot and probed for XPO1 and tubulin. One representative western blot is shown. XPO1 band intensity was normalized to tubulin. Quantification from two biological replicates is shown.MCF-10AT1k.cl2 cells were transfected with control or XPO1 siRNA. Lamin B1 and lamin A/C nuclear staining intensities were quantified based on experiments using two different XPO1 siRNA sequences and two biological replicates. For each experiment, 108-865 nuclei were quantified per condition (416 nuclei on average). Average and SD values based on averages from these four experiments are plotted, normalized to the negative siRNA control.MCF-10AT1k.cl2 cells were transfected with the indicated siRNAs and nuclear cross-sectional areas were quantified. For each experiment, 203-604 nuclei were quantified per condition (403 nuclei on average). Average and SD values based on averages from four biological replicates are plotted, normalized to the negative siRNA control.MCF-10AT1k.cl2 cells were transfected with control siRNA or with siRNA against XPO1. Cells were stained with DAPI and quantification of DNA staining intensity was used to estimate the fraction of cells in various stages of the cell cycle by high-throughput imaging as previously described [123] (see Methods). The stacked bars represent the means of the fractions for each cell cycle phase calculated over 3 biological replicates.MCF-10AT1k.cl2 cells were transfected with control or XPO1 siRNA. For the bottom row of images, cells transfected with control siRNA were treated with 20 ng/ml leptomycin B for 24 hours. Cells were fixed and stained with 2 µg/ml FITC. Representative images are shown. Scale bar, 20 µm. For each experiment, nuclear cross-sectional areas and nuclear FITC staining intensities were quantified for 105-620 nuclei per condition (267 nuclei on average) and normalized to the negative control. Two biological replicates, data from one representative experiment shown.
Figure 1(B) COUP-TFII expression (green) is increased in human kidneys from patients with thrombotic microangiopathy (TMA) and diabetic nephropathy (DN) (n=2). Quantification by confocal micrographs in 400x hpf. ****p<0.0001 by one-way ANOVA; mean ± SD. The majority of these cells were localized in the interstitial region. More than 50% COUP-TFII (+) cells (green) are co-localized with expanded αSMA-positive (red) areas of fibrosis. Pearson correlation coefficient (PCC) = 0.56 ± 0.1 for patient#1 and 0.65 ± 0.13 for patient#2.(C) COUP-TFII expression (green) is increased in lungs from patients with IPF (n=2) by immunofluorescence. Quantification by confocal micrographs in 400x hpf. **p<0.01; ****p<0.0001 by one-way ANOVA, mean ± SD.(E) COUP-TFII expression increased significantly in organoids treated with TGFβ1 (10ng/ml), cobalt chloride (100 μM), IL-1β (10ng/ml), but not PDGF (50ng/ml). Quantification by confocal micrographs in 400x hpf. *p<0.05; **p<0.01; ****p<0.0001 by one-way ANOVA, mean ± SD. The higher magnification of the insert from IL-1β φησwed co-localization of COUP-TFII (green) and αSMA (red) staining.
Figure 2(C) Majority COUP-TFII+ cells (green) were also positive for Foxd1 (tdTomato-labeled as red) in the non-injured mice kidney (n=2). Quantification by confocal micrographs in 400x hpf.
Figure 3(A) COUP-TFII expression is significantly increased and co-localized with αSMA+ cells at day 10 of UUO and day 14 of UIRI in mice (n=3 animals per group). Quantification by confocal micrographs in 200x hpf. *p<0.05 **p<0.01 by paired t test; mean ± SD.(B) In a time course of UUO, COUP-TFII expression increased as early as day 2 and preceded the increased expression of αSMA (n=2 animals per time point). Quantification by confocal micrographs in 200x hpf. *p<0.05; ***p<0.001 by two-way ANOVA test; mean ± SD.(E&F) Gli1-tdTomato+ cells expanded primarily in the outer medullary region. In contrast, COUP-TFII+ cells are distributed both in cortex and medulla. A subset of COUP-TFII+ cells (green) overlap with genetically labeled Gli1+ pericyte/perivascular cells (red) in UUO injury model (n=3 animals per group). CTL: contralateral kidney. Quantification by confocal micrographs in 200x hpf.
Figure 4(D) COUP-TFII+ cells decrease significantly in the UUO kidney in TAM-treated homozygous (F/F;Cre/+) mice (KO group, n=6) compared to wild-type littermates (WT group, n=4). Expression of αSMA (red) and collagen1 (yellow) are also markedly reduced. Masson Trichrome staining shows less kidney fibrosis in KO compared to WT group. Quantification by confocal micrographs in 200x hpf. **p<0.01 by unpaired t test, mean ± SD.
Figure 5(D) COUP-TFII-OE cells, in the absence of TGFβ1 stimulation, displayed an elongated fibroblast shape with increased αSMA expression, similar to WT cells treated with TGFβ1. Quantification by confocal micrographs in 400x hpf, *p<0.05, **p<0.01, ***p<0.001 by one-way ANOVA, mean ± SD.(E) Overexpression of COUP-TFII alone without TGFβ1 induces collagen1 production (n=3). *p<0.05, **p<0.01, ***p<0.001 by one-way ANOVA, mean ± SD.
Figure 6(D) WT, COUP-TFII overexpression (OE) and COUP-TFII knockout (KO) cells were seeded in Seahorse XF-24 cell culture microplates. The cells were rendered quiescent in 0.5% FBS DMEM overnight and then treated with or without 10 ng/ml TGFβ1 for 24 hours. All the cells were incubated in the glycolysis stress test medium without glucose and pyruvate, followed by sequential treatments with glucose (10mM), oligomycin (5μg/ml) and 2-DG (50mM). Real-time extracellular acidification rate (ECAR) was recorded as the baseline (before glucose), the rate of glycolysis (after glucose), glycolytic capacity (after oligomycin), and glycolytic reserve (after 2-DG) (n = 10).(E) COUP-TFII OE significantly increased, while COUP-TFII KO decreased, in the baseline, rate of glycolysis, glycolytic capacity, and glycolytic reserve when compared to WT cells under TGFβ1 stimulation. Without TGFβ1 treatment, there is no difference on the baseline and glycolysis among WT, OE, and KO cells. COUP-TFII KO significantly decreased glycolytic capacity and reserve compared to WT, even without TGFβ1 stimulation (n=10), *p<0.05; **p<0.01; ****p<0.0001 by one-way ANOVA, mean ± SD.