EMBO/SourceData huggingface dataset:
Figure 3(A) GFP-Trap coupled to mass spectrometry strategy used. The volcano plot represents 3 independent combined experiments. Threshold selection of enriched proteins (red dots) in Irgm2-GFP fraction was set at 2 fold enrichment (x axis) and p-value <0.05 (y axis). Blacks and Grey dots indicate proteins that did not reach a p-value <0.05 using t-test with bonferroni correction. Labelled proteins represent the top 6 enriched proteins in the Irgm2 fraction.(B) Green Florescent Protein (GFP)-Trap assay of the presence of Gate16 in Irgm2-GFP-enriched fraction from the lysates of IFNγ-primed iIrgm2-/- BMDMs complemented with lentiviral constructs coding for a fusion of Irgm2 withGFP (Irgm2-GFP) or GFP alone. Arrows show the presence or not of Gate16, Irgm2-GFP and GAPDH in the Irgm2-GFP-enriched fractions, flow-through and total cell lysates. * means non-specific band(C) LDH and IL-1β release from siRNA-treated WT BMDMs, and then exposed to 2.5 µg/2.105 cells of OMVs for 16 hours.(D) LDH and IL-1β release from WT, Irgm2-/- and Casp11-/- BMDMs silenced for Gate16 and treated for 16 hours with 2,5µg/2.105 cells of OMVs. Si Scramble (siScr.) refers to RNAi pools with non-targeting sequences.(E) Western blot examination of caspase-11 and processed caspase-1 (p20)and gasdermin-D (p30) in supernatants and pro-caspase-1 (p45), pro-gasdermin-D (p55), pro-caspase-11, Gate16 and GAPDH in cell lysates of Gate16-silenced WT, Irgm2-/- and GBPChr3-/- BMDMs exposed to 2,5.105µg/2.105 cells of OMVs for 16 hours. Si Scramble (siScr.) refers to RNAi pools with non-targeting sequences.(F) Representative confocal fluorescence microscopy images and associated quantifications of caspase-11-C254G-GFP (green) recruitment to S.Tm-mCherry (orgA-, red, MOI 10) in IFNγ-primed iWT BMDMs silenced for Gate16 after 4 and 8 hours of infection. Nucleus (blue) was stained with Hoechst; scale bar 5µm. For quantifications, the percentage of bacteria positive for caspase-11-C254G-GFP was determined by combining the bacterial counts from n=3 independent experiments and expressed as mean ± SEM. **p ≤ 0.01, ***p ≤ 0.001 for the indicated comparisons using t-test with bonferroni correction. Si Scramble (siScr.) refers to RNAi pools with non-targeting sequences.
Figure 4(A) LDH and IL-1B release from siRNA-treated primary human Monocyte-Derived Macrophages (hMDMs) infected with S. Typhimurium orgA- (MOI25) for 16 hours. When specified, the caspase-4/5 inhibitor Z-LEVD (25µM) or the NLRP3 inhibitor MCC950 (10µM) were added to the experiments.(B) LDH and IL-1B release from siRNA-treated primary human Monocyte-Derived Macrophages (hMDMs), primed with IFNγ (10UI/mL) and PAM3CSK4 (100ng/mL) and then stimulated with Nigericin (20µM) for 4 hours. When specified, the caspase-4/5 inhibitor Z-LEVD (25µM) or the NLRP3 inhibitor MCC950 (10µM) were added to the experiments.(C, D) LDH and IL-1B release from siRNA-treated WT or GBP1/2/5-/- U937 Monocytic cell line, primed with IFNγ (10UI/mL) and PAM3CSK4 (100ng/mL) and then infected with (C) with S. Typhimurium orgA- (MOI25) for 10 hours or (D) electroporated with 1µg of E. coli LPS for 4 hours. Φ indicates that no LPS electroporation was performed.
Figure 1B Analysis of cell differentiation (left) and proliferation (right) in the intestine after CDK8 deletion as in (A). Olfm4, Lysozyme, PAS and Dclk1 staining was used to reveal, respectively, stem, Paneth, goblet and tuft cells. β-Catenin staining allows detection of cancer cells (cytoplasmic vs nuclear localisation). Cell proliferation was assessed by PCNA, Ki-67 and BrdU (2h pulse) staining. Scatter plots represent the percentage of the area stained by each antibody (relative to the area occupied by hematoxylin). For Paneth cells, BrdU, PCNA and Ki67, only crypts were analysed. For goblet cells, crypts and villi were analysed. For Tuft cell quantification, Dclk1-positive cells were counted in 50 villi. Colour code depicts small intestine (green), proximal colon (blue), and distant colon (red). Mean ± SEM is shown. P-value of unpaired two-tailed t-test is indicated (ns, not significant; p > 0.05). Scale bars, 25μm (Olfm4, Lysozyme, Dclk1 and β-Catenin) and 50μm (PAS, BrdU, Ki-67 and PCNA). (n=9 biological replicates)C Analysis of mouse colon after AOM/DSS treatment. Quantification of the number of neoplastic lesions (n = 10 for Cdk8+/+, and n = 7 for Cdk8 -/- mice). P-value of unpaired t-test is indicated: ns, not significant (p > 0.05). Mean ± SD is shown.D Quantification of the percentage of the colon surface occupied by tumours. Intestine samples were stained for β-Catenin, and tumour regions with nuclear β-Catenin localisation were quantified using NDP.view software. Two-tailed p-value of unpaired t-test is indicated; ns, not significant (p > 0.05). Mean ± SD is shown. (n=6 biological replicates)E Example of IHC with β-Catenin staining of tumour-free regions with membrane β-catenin localisation (left) and tumour regions with nuclear β-catenin localisation (right). Scale bars, 50μm.
Figure 2A Genotyping confirms the loss of Cdk8 exon 2 in Cdk8 -/- and Cdk8 -/-/Cdk19 -/- organoids after 7 days of OH-tamoxifen treatment.B WB of organoid samples after 7 days of OH-tamoxifen treatment; β-actin was used as loading control.C Phase contrast images of organoids before and after 6 days of OH-tamoxifen treatment. Scale bars, 150μm. D Quantification of organoid size at day 6, shown in (C) (mean ± SEM are shown). P-value, one-way ANOVA (Bonferroni test): (*) p ≤ 0.05, (***) p ≤ 0.001; ns, not significant (p > 0.05). (n=47 biological replicates)E IHC staining of organoids (day 7 of OH-tamoxifen treatment) with Ki-67 antibody. Scale bars, 100μm. F Quantification of Ki-67 positive area (% of the total area of the organoids; mean ± SEM) in the four different genotypes presented in (E). Areas with positive Ki-67 signal were detected and quantified using QuPath and ImageJ programs. Four technical replicates from 2 biological replicates of each genotype were analysed. Adjusted p-values of ordinary one-way ANOVA (Bonferroni test) are indicated: (**) p-values ≤ 0.01; (*) p-values ≤ 0.05; ns, not significant (p > 0.05).
Figure 3C Left, IHC staining of WT and Cdk8 -/-/Cdk19 -/- organoids with Olfm4 (stem cells), Lysozyme (Paneth cells), Muc2 (goblet cells), and Dclk1 (tuft cells) antibodies. Scale bars, 50μm (Olfm4, Muc2, Dclk1) and 25μm (Lysozyme). Right, quantification of Olfm4, Lysozyme and Muc2 positive area (% of the total organoid area as indicated by hematoxylin staining; mean ± SEM), or the number of Dclk1 positive cells per organoid. P-value, unpaired two-tailed t-test: (***) p-value ≤ 0.001; ns, not significant (p > 0.05). 20 different organoids from 2 biological replicates of each genotype were used for the analysis.
Figure 4D WB of indicated proteins extracted from Wt and Cdk8 -/-/Cdk19 -/- organoids. Included are CFTR positive and negative control cell line samples obtained from the Cystic Fibrosis Foundation (CFF). Amidoblack was used as loading control.
Figure 5A Histological PAS staining of organoids treated for 7 days with OH-tamoxifen. Scale bar, 50μm. B Quantification of PAS signal (% of total organoid area; mean ± SD are shown) in the four different genotypes presented in (A). Areas containing positive PAS staining were detected and quantified using QuPath and ImageJ programs. Adjusted p-values of ordinary one-way Anova followed by Tukey's multiple comparison test are indicated: (***) p-value ≤ 0.001; ns: not significant (p > 0.05). Four technical replicates from 2 biological replicates of each genotype were analysed.C Representative phase contrast images of organoids at the indicated time points after 7 days of OH-tamoxifen treatment are shown. Scale bar, 100 μm. D Quantification of the time needed for mucus release (observed as a dark staining in the center of the organoid; mean ± SD are shown). Adjusted p-values of ordinary one-way Anova followed by Tukey's multiple comparison test are indicated: (***) p-value ≤ 0.001; ns: not significant (p > 0.05); (n= 17 for Wt, 11 for Cdk8 -/-, 18 for Cdk19 -/-, and 12 for Cdk8 -/-/ Cdk19 -/- , all biological replicates).E Fluorescence confocal microscopy images of Calcein green-labeled WT and Cdk8-/-/Cdk19-/- organoids treated with forskolin. Scale bars, 100 μm. F Quantification of forskolin-induced swelling in WT organoids treated for 1hour or 24 hours with 0.1μM, 1μM or 10μM Senexin B (SenB), as indicated, or double KO organoids; DMSO vehicle was used as control. The surface area of individual organoids at different time points relative to the area at t = 0 (100%) was measured (mean ± SD, n=8 biological replicates). Linear regression lines are shown.H WB of indicated proteins extracted from Senexin B-treated (10μM, 2h and 24h) organoids (left), and WT and Cdk8 -/-/ Cdk19 -/- organoids (right). Amidoblack was used as loading control.
Figure 6A WB of indicated proteins extracted from intestinal epithelium of control mice or mice treated with Senexin 631 (Snx 631) for 4 or 11 days.B Left, immunohistochemical PAS and hematoxylin staining of mouse small intestines collected at 4 and 11 days of Senexin 631 (Snx 631) treatment; scale bars 50μm. Right, quantification of PAS- and hematoxilin (Hema)-positive area (mean ± SEM), using QuPath and ImageJ software. Adjusted p-values of unpaired t-test are shown: (*) p < 0.05; ns, not significant (p > 0.05). 8 mice (4 treated with Senexin 631 and and 4 control) were used in this quantification.
Figure 1.Changes with time in amounts of SH-EP, α-amylase, and VmPE-1 in cotyledons of V. mungo seedlings (Attached cotyledons) or embryo axis-removed cotyledons of V. mungo seeds (Detached cotyledons). Attached or detached cotyledons were prepared as described in Materials and methods. 10 pairs of cotyledons were homogenized with 3 ml of 50 mM Tris-Cl (pH 7.4), and the homogenates were centrifuged at 15,000 g for 10 min. Supernatants (10 μl each) were analyzed by SDS-PAGE immunoblotting with anti-SH-EP, α-amylase, or VmPE-1 antibody.
Figure 2.Subcellular distribution of α-amylase in V. mungo cotyledon cells. Microsome and PSV fractions were prepared from cotyledons of day 3 seedlings as described in Materials and methods. Extracts from dry seeds and day 3 cotyledons, microsomes, and PSV fractions (20 μg protein each) were separated by SDS-PAGE. Proteins in the gel were analyzed by Coomassie Brilliant blue staining (A), or by immunoblotting with anti-SH-EP antibody (B) or anti- α-amylase antibody (C). Bracket indicates the polypeptides derived from storage globulins. Arrowhead indicates α-amylase.
Figure 3.Electron micrographs showing the immunogold localization of α-amylase in attached cotyledons cells (A-E), detached cotyledons cells (F), or control for immunogold labeling (G). (A) Anti-α-amylase antibody immunogold-stained PSV, but not SG. (B and C) Golgi complex and PSVs were both immunogold-labeled with anti- α-amylase antibody. (D) Immunogold localization of α-amylase (15-nm particles) and SH-EP (10-nm particles). α-Amylase and SH-EP were localized in PSVs and KVs, respectively. (E) Gold particles from anti-α-amylase antibody were detected in LVs as well as PSVs. (F) PSVs in detached cotyledons were immunogold labeled with anti- α-amylase antibody. (G) Immunogold staining of detached cotyledon cells without first antibody (anti-α-amylase antibody). No gold particles were observed in the cell. CW, cell wall; G, Golgi complex; KV, KDEL-tailed cysteine proteinase-accumulating vesicle; LV, lytic vacuole; Mt, mitochondrion; PSV, protein storage vacuole; SG, starch granule. Bars, 200 nm.
Figure 4.Electron micrographs showing ultrastructures of cotyledon cells of germinatedV. mungo seeds (A-G), immunogold localization of α-amylase in cotyledon cells (H), and ultrastructure of cells of detached cotyledons (I). Toluidine blue (TB) staining of sections from cotyledons of day 3 V. mungo seedlings. Conversion from TB-stained cells (region I) to TB-stainless cells (region III) was accompanied with that of the PSV to LV. (B) SGs and PSVs in TB-stained cells (A, region I). The PSV was filled with storage proteins. Arrowheads indicate border between SGs and the cytoplasm. (C) SGs and PSVs in cotyledons at region II in A. Electron density of PSVs became low. SGs were surrounded with membranous structure (arrows). LED areas were found between SGs and the cytoplasm. (D) SG and LV in TB-stainless cells (region III in A). The PSV was converted to the LV in the cells. The areas around SG with LED were enlarged. (E) Ultrastructure of TB- stainless cells. SGs wrapped with a LED area contacted with LVs (arrowheads). Vesicles with similar density to LVs were observed. (F) LED membranes around the SGs fused with the LV membranes (arrow). (G) SGs were observed in LVs. The shape of SGs were largely different from those in B-E. (H) An Immunogold image representing degradation of SGs by α-amylase localized in LVs. Gold particles from anti-α-amylase antibody were densely detected in the peripheral region of SGs, which is inserted into the inside of the LV. (I) PSVs were not converted to LVs, and SGs were not taken up into PSVs in the cells of detached cotyledons. Neither low density areas around SGs nor vesicles with similar density to LV was observed in the cells. LV, lytic vacuole; Mt, mitochondrion; PSV, protein storage vacuole; SG, starch granule. Bars: (A) 50 μm; (E and G) 2 μm; (D, F, and I) 1 μm; (B, C, and H) 200 nm.
Figure 5.LysoTracker red staining of partially broken cotyledon cells, SGs, or cotyledon sections. Cotyledon cells, SGs, and sections were prepared from day 3 attached or detached cotyledons and stained with LysoTracker red as described in Materials and methods. (A) Differential interface-contrast image of a broken cell. (B) Fluorescent image of A. (C) Differential interface-contrast image of a broken cell. (D) Fluorescent image of C. (E) Differential interface-contrast image of cells of a section from attached cotyledons. (F) Fluorescent image of E. (G) Magnified image of E. (H) Magnified image of F. (I) Differential interface-contrast image of an SG. (J) Fluorescent image of I. (K) Differential interface-contrast image of an SG. (L) Fluorescent image of K. (M) Differential interface-contrast image of cells of a section from detached cotyledons. (N) Fluorescent image of M. (O) Magnified image of M. (P) Magnified image of O. Bars: (A-D, G-L, O, and P) 20 μm; (E, F, M, and N) 50 μm.
Figure 6.Electron micrographs showing autophagosome-mediated autophagy in attached (A-C) and detached (D and E) cotyledon cells. (A) Two autophagosomes containing cytoplasm were observed. Mitochondria and the cytoplasm appeared to be enclosed with an ER-like double membrane. (B) An autophagosome containing mitochondria and cytoplasm was fused with LV (arrowheads). (C) Autophagic body containing mitochondria was found in LV. (D) An autophagosome containing mitochondria and cytoplasm was observed. The PSV was not converted into the LV. (E) Autophagic body was observed in the PSV of detached cotyledon cells. AB, autophagic body; AP, autophagosome; ER, endoplasmic reticulum; LV, lytic vacuole; Mt, mitochondrion; PSV, protein storage vacuole; SG, starch granule. Bars, 200 nm.
Figure 1E The representative images of IF-IHC staining of E14.5 embryonic brains with antibodies against Iba-1 (green) and DAPI (blue). Scale bar, 200 μm. F Quantification of numbers of Iba-1+ cells on the meningeal regions. Mock n=5; ZIKV n=7 embryos. Data information: *P<0.05, **P<0.01, ***P<0.001, ****P<0.0001, two-tailed unpaired t-test. All data are presented as mean ± SEM.G The representative images of IF-IHC staining of choroid plexus of E14.5 embryonic brains with antibodies against Iba-1 (green) and DAPI (blue). Scale bar, 50 μm. H Quantification of total number of Iba-1+ cells per ChP area. I Percentage of Iba-1+ cells on the surface of ChP. J Percentage of round-shaped Iba-1+ cells. Data information: *P<0.05, **P<0.01, ***P<0.001, ****P<0.0001, two-tailed unpaired t-test. All data are presented as mean ± SEM. Mock n=5; ZIKV n=6 biological replicatesK The representative images of IF-IHC staining of choroid plexus of E14.5 embryonic brains with antibodies against Iba-1 (green), CD68 (red) and DAPI (blue). Scale bar, 50 μm. L Percentage of CD68+; Iba-1+ cells out of total Iba-1+ cells. Data information: *P<0.05, **P<0.01, ***P<0.001, ****P<0.0001, two-tailed unpaired t-test. All data are presented as mean ± SEM.
Figure 2B Representative animal tracks in the sociability test. C Percentage of time the subject mice spent in each chamber in the sociability session of three-chamber test. Mock (n=11) stranger 1 (S1) chamber vs. empty (E) chamber; ZIKV (n=16) stranger 1 chamber vs. empty chamber; one-way ANOVA with Bonferroni post hoc test. D Quantification of time spent investigating the stranger mouse and empty cage during sociability session. Mock (n=11) sniffing time at stranger 1 mouse vs. empty cup, ZIKV (n=16) sniffing time at stranger 1 mouse vs. empty cup. E Preference indices in sociability. Mock (n=11) vs. ZIKV (n=16). F Representative animal tracks in the social memory test. G Percentage of time the subject mice spent in each in the social memory session. Mock (n=11) stranger 1 (S1) chamber vs. stranger 2 (S2) chamber, p< 0.0001; ZIKV (n=16) stranger 1 chamber vs. stranger 2 chamber; one-way ANOVA with Bonferroni post hoc test. H Quantification of time spent investigating the familiar mouse and novel stranger mouse during social novelty session. Mock (n=11) sniffing time at stranger 1 vs. stranger 2 mouse; ZIKV (n=16) sniffing time at stranger 1 vs. stranger 2 mouse. I Preference indices in the social novelty session of the three-chamber test. Mock (n=11) vs. ZIKV (n=16). Data information: All data were presented as mean ± SEM. *P < 0.05, **P < 0.01, ***P < 0.001, ****P < 0.0001, two-tailed unpaired t-test unless described otherwise; n represent biological replicates.
Figure 3B Quantitation of sEPSC frequency mPFC from pyramidal neurons in mPFC. C Quantitation of sEPSC amplitude of mPFC pyramidal neurons. Mock, n=14 neurons from 4 mice; ZIKV, n= 15 neurons from 5 mice in B and C. Data information: Data were collected from PL and IL regions of mPFC, and were presented as mean ± SEM. *p<0.05, **p<0.01. Two-tailed unpaired t-test unless described otherwise.E Quantifications of sIPSC frequency from pyramidal neurons in mPFC. F Quantifications of sIPSC amplitude of mPFC pyramidal neurons. Mock, n=14 neurons from 5 mice; ZIKV, n= 18 neurons from 6 mice in E and F. Data information: Data were collected from PL and IL regions of mPFC, and were presented as mean ± SEM. *p<0.05, **p<0.01. Two-tailed unpaired t-test unless described otherwise.
Figure 4A Representative images of PV+, SST+ and CAL+ cells in the prelimbic (PL, upper panel) and infralimbic (IL, lower panel) cortex. Scale bars: 200 μm.H IHC staining of mPFC stained with antibodies against vGLUT1. Scale bars, 5 μm. I Quantification of vGLUT1+ puncta numbers out of 100 μm2 region. Mock, n=4 mice; ZIKV, n=4 mice. Data information: All data are presented as mean ± SEM. *P<0.05, **P<0.01. Two-tailed unpaired t-test unless described otherwise.J IHC staining of mPFC stained with antibodies against vGAT. Scale bars, 5 μm. K Quantification of vGAT+ puncta numbers out of 100 μm2 region. Mock, n=4 mice; ZIKV, n=4 mice. Data information: All data are presented as mean ± SEM. *P<0.05, **P<0.01. Two-tailed unpaired t-test unless described otherwise.
Figure 5B Representative confocal images of the vHIP stained with mCherry (red) and c-Fos (green). C Quantification of mCherry and c-Fos double positive cells out of total mCherry-positive cells in the vHIP CA1 regions. Scale bar, 50 μm. Mock (n= 5 mice) vs. ZIKV (n= 5 mice), p=0.0013. Data information: Data were presented as mean ± SEM. *P<0.05, **P<0.01, Two-tailed unpaired t-test unless described otherwise.F Representative EPSC traces of the pyramidal neurons in the mPFC. G Quantification of EPSC amplitude of the pyramidal neurons in the mPFC (PL and IL). Mock (n=17 neurons from 5 mice) vs. ZIKV (n=19 neurons from 5 mice), p=0.0122. Data information: Data were presented as mean ± SEM. *P<0.05, **P<0.01, Two-tailed unpaired t-test unless described otherwise.
Figure 6B Representative examples of GFP-labeled presynaptic boutons. Scale bars: 2.5 μm. C Quantification of presynaptic bouton density and weighted size in the mPFC (PL and IL). Mock: n= 57 axons from 6 mice; ZIKV: n= 63 axons from 7 mice. D Quantification of presynaptic bouton weighted size in the mPFC (PL and IL). Mock: n= 2974 boutons from 6 mice; ZIKV: n= 3486 boutons from 7 mice. Data information: All data were presented as mean ± SEM. *P<0.05, **P<0.01, Two-tailed unpaired t-test unless described otherwise.H Comparisons of percentages of vHIP-innervated mPFC (PL and IL) neuron subtypes. Mock, n=4 mice; ZIKV, n=7 mice. P= 0.5343 in CaMKIIa, 0.0117 in PV, 0.7491 in CAL, 0.4484 in SST, 0.1519 in other uncharacterized neuron subtypes. Data information: All data were presented as mean ± SEM. *P<0.05, **P<0.01, Two-tailed unpaired t-test unless described otherwise.J Representative confocal images of CTB488-labeled tdTomato-positive neurons in the vHIP. White arrowheads indicate CTB488 single positive neurons. Scale bars: 200 μm. K Quantification of the percentage of tdTomato;CTB488 double-positive cells out of total CTB488-positive cells. Mock, n= 7 mice; ZIKV, n=7 mice. Data information: All data were presented as mean ± SEM. *P<0.05, **P<0.01, Two-tailed unpaired t-test unless described otherwise.
Figure 7C Representative animal tracks in three-chamber test. D Discrimination indices of the social memory session of three-chamber test. mCherry mock, n=8 mice; mCherry ZIKV, n=10 mice; hM4Di ZIKV n=10 mice, mCherry mock vs. mCherry ZIKV p=0.0041; mCherry ZIKV vs. hM4Di ZIKV p=0.0115; and mCherry mock vs. hM4Di ZIKV p=0.7076. Data information: All data are presented as mean ± SEM. *P < 0.05, **P < 0.01, ****P < 0.0001, one-way ANOVA with Tukey post hoc test.E Representative confocal images of mCherry (red) and c-Fos (green) double-labeled cells in the vHIP CA1 regions. Scale bars, 50 μm. F. Quantification of the percentage of c-fos;mCherry double positive cells out of total mCherry cells. mCherry mock, n=6 mice; mCherry ZIKV, n=4 mice; hM4Di ZIKV n=6 mice. Data information: All data are presented as mean ± SEM. *P < 0.05, **P < 0.01, ****P < 0.0001, one-way ANOVA with Tukey post hoc test.
Figure 3 Therapeutic leads generated using PDN were directly tested for survival benefit using a murine model of endotoxemia. Select compounds were injected 24 hours before and on the day of LPS administration, using routes and doses specified in the methods. C57bl/6 female mice were injected with a high-lethality dose of E. coli LPS (38-40 μg/g) followed by a subcutaneous injection of sterile saline. Significant differences in concentration between drug and vehicle-treated pre- and post-pubertal mice are labeled with **** (p<0.0001), *** (p<0.001, ** (p<0.01), or * (p<0.05). Percent survival was compared using a log rank Mantel Cox test
Figure 1D) In the 6 months old p32cKO heart, p62 and multi-ubiquitin staining patterns were co-localized. Scale bar, 5 µm. E) In the 6 months old p32cKO heart, the staining patterns of p62 and the mitochondrial marker protein, pyruvate dehydrogenase (PDH), were co-localized. Scale bar, 5 µm.(F) Western blot analysis of ubiquitinated proteins using an anti-multi-ubiquitin antibody in the 6 months old WT and p32cKO heart (n = 4 mice per group). Error bars are presented as mean ± SD. Student's t-test was performed on WT vs p32cKO, ***p < 0.005.