EMBO/SourceData huggingface dataset:
Figure 4 Stabilized β-catenin prevents the downregulation of HR and FA pathway genes upon Wnt inhibition. Mice bearing HPAF-II xenografts without or with stabilized β-catenin were treated with ETC-159 (37.5mg/kg bid) for 56 hours before tumors were harvested and the expression of indicated genes was measured by qRT-PCR. ETC-159 induced reduction in the expression of HR and FA pathway genes was blocked in xenografts with stabilized β-catenin. The horizontal lines represent mean of replicates E, F. G007-LK and olaparib synergistically inhibit the growth of COLO320HSR colorectal cancer cells with APC mutation. COLO320HSR cells were plated at a low density and treated with G007-LK, olaparib or the combination of the two inhibitors at an equivalent dose as described in Figure 1A. (E) Representative image from two independent experiments is shown. (F) The Combination Index (CI) values of olaparib and G007-LK calculated from two independent experiments using the Chou-Talalay CompuSyn software
Figure 5β-catenin regulates the expression of MYBL2 in HPAF-II cells. HPAF-II cells were either treated with ETC-159 (100 nM) or transfected with siRNA against β-catenin alone or in the presence of ETC-159 for 48 hours. The relative expression of MYBL2 as measured by qRT-PCR is shown. The horizontal lines represent mean of replicates.Expression of DNA repair genes in Wnt-addicted cells is regulated by MYBL2. HPAF-II cells were transfected with two independent siRNAs against MYBL2 or treated with ETC-159 (100 nM) for 48 hours. Total RNA was isolated and expression of MYBL2 and DNA repair genes was measured by qRT-PCR. Data are representative of three independent experiments. The horizontal lines represent mean of replicates.H-K. Expression of MYBL2 is downregulated upon ETC-159 or G007-LK treatment in multiple Wnt-high tumors. Expression of MYBL2 in AsPC-1 xenograft tumors and colorectal cancer PDX (as measured by RNA-seq) or in pancreatic cancer PDX with RNF43 mutation (measured by qRT-PCR) is reduced with ETC-159 treatment. G007-LK reduces MYBL2 expression in COL320HSR cells (measured by qRT-PCR). p-values were calculated with Mann-Whitney U test. Each data point represents an individual tumor or replicate. n = 4-6 samples/group. The horizontal lines represent median of 4-6 replicates with the upper and the lower edges of the boxes representing the 75th and the 25th percentile of the data respectively and the whiskers representing 1.5x interquartile range.
Figure 6F, Wnt inhibition induces senescence, which is further enhanced by co-treatment with olaparib. (F) Representative images of tumor sections from the four treatment groups (treated for 21 days) stained for SA-β-galactosidase, a senescence marker, and counterstained with nuclear fast red. Blue color indicates positive staining for senescent cells. The horizontal lines represent mean of replicates. p-values were calculated by Mann-Whitney U test.Wnt inhibition potentiates DNA double strand breaks induced by olaparib treatment. (H) HPAF-II cells were treated with DMSO, ETC-159 (50 nM), olaparib (20 µM) or both for 7 days. 53BP1 foci per cell were then assessed by immunofluorescence. The horizontal lines represent mean of replicates. p-values were calculated by Mann-Whitney U test.I. Wnt inhibition potentiates DNA double strand breaks induced by olaparib treatment. (I) Representative immunofluorescence images of 53BP1 foci (red) and nuclei counterstained with DAPI (blue) are shown for each group.
Figure 7Immunohistochemical staining of sections of small intestine from C57BL/6J mice for DNA repair proteins shows that the expression of BRCA1, FANCD2 and RAD51 was high in the crypts (Wnt high compartment) whereas the villi did not show any staining. Small intestinal adenomas from APCmin/+ mice displayed positive nuclear immunostaining for HR and FA pathway proteins BRCA1, FANCD2 and RAD51. The bottom panels are higher magnification images of the areas marked in the top panels.PORCN inhibition reduces the expression of HR and FA pathway proteins in the normal mouse intestine. C57BL/6J mice were treated with vehicle or ETC-159 (60 mg/kg) for 3 days. Small intestines were sectioned and analyzed by immunostaining for BRCA1, FANCD2, RAD51 and phosphorylated-BRCA1.
figf1(a) Expression levels of Tcfeb mRNA in tissues isolated from 24-h-fasted (24 h starved) 6-week-old mice. Values are expressed as fold change relative to Tcfeb expression in mice fed ad libitum (Fed). Bars represent mean ± s.d. for n = 5 mice; *P≤0.05; **P≤0.01; ***P≤0.001.(b) Representative β-gal staining of liver and kidney frozen sections isolated from fed and 24-h-fasted heterozygous Tcfeb- β-gal mice.c) Time-course expression analysis of TFEB in wild-type HeLa cells, MEFs and hepatocytes after the addition of starvation media (time 0). Data represent mean ± s.d. for n = 3 independent experiments.(d) Expression levels of transfected hTFEB-FLAG, Tcfeb- β-gal fusion transcript and endogenous Tcfeb mRNAs in MEFs isolated from control (+/+) and heterozygous Tcfeb- β-gal/+ mice. Data represent mean ± s.d. for n = 3 mice; *P≤0.05.(e) Time-course expression analysis of TFEB mRNA in control (Ctrl) or TFEB-overexpressing HeLa cells during fasting and re-feeding. Primers specific for the endogenous TFEB were used. Data represent mean ± s.d. for n = 3.(f) Time-course expression analysis of Tcfeb mRNA in heterozygous Tcfeb- β-gal/+ or control MEFs during fasting and re-feeding. Specific primers for the endogenous Tcfeb were used. Data represent mean ± s.d. for n = 3 mice.(g) Expression analysis of Tcfeb mRNA in heterozygous Tcfeb- β-gal/+ or control hepatocytes in fed and after 24 h fasting. Data represent mean ± s.d. for n = 3 mice.(h) ChIP analysis from liver of mice fed ad libitum or 24 h fasted. The CLEAR elements in the first intron of Tcfeb genomic DNA are shown as numbered black rectangles as indicated in Supplementary Table S1. Red rectangles represent exons, and the ATG indicates the first codon (from the mouse Tcfeb isoform b). The histogram shows the amount of immunoprecipitated DNA as detected by quantitative PCR assay. Values were normalized to the input and plotted as relative enrichment over a mock control. Data represent mean ± s.d of 3 independent experiments.
figf3(a) ChIP analysis from liver of mice fed ad libitum (fed) or 24 h-fasted (starved). CLEAR sites in the promoter region of Pgc-1α are indicated by squares. Numbers indicate the distance (bp) of the binding element from the start codon. Bar graphs show the amount of immunoprecipitated DNA as detected by quantitative PCR assay. Values were normalized to the input and plotted as relative enrichment over a mock control. Bar graphs represent mean ± s.d of 3 independent experiments, *P≤0.05; **P≤0.01.(c) Luciferase activity was measured after transfecting increasing amounts of TFEB-FLAG in combination with Pgc-1α WT or Pgc-1α DEL plasmids. Bar graphs represent mean ± s.d. of n = 3independent experiments, ****P≤0.0001 compared with mock transfected cells.(d) Luciferase activity was measured in cells stably overexpressing TFEB cultured in normal and starved media. Bar graphs represent mean ± s.d. of n = 3independent experiments **P≤0.01 compared with mock transfected cells.(e) Quantification of mRNA levels of PGC1α in liver and hepatocytes from control, HDAd-TFEB and Tcfeb-LiKO (liver KO) mice treated as indicated. Bar graphs show mean ± s.d. for n = 4 mice. *P≤0.05; **P≤0.01.(f) Expression analysis of TFEB target genes in liver of mice with indicated genotypes. Bar graphs show mean ± s.d. for n = 3 mice. *P≤0.05;**P≤0.01; ***P≤0.001.(g) Expression analysis of PGC1α/PPARα target genes in liver from either fasted or fed mice with indicated genotypes. Bar graphs show mean ± s.d. for n = 4. *P≤0.05; **P≤0.01 compared with the respective controls (fed or fasted).
figf4(a) Oil red O staining of liver sections isolated from mice with the indicated genotype fed ad libitum and 24 h fasted. Original magnification ×40. (b) Toluidin blue staining of liver sections isolated from fed and 24-h-fasted Tcfeb-LiKO and control mice (Tcfeb flox/flox mice). Arrows indicate lipid droplets. Original magnification ×100.(c) Bar graphs show the quantification of the number of lipid droplets per hepatocyte from electron microscopy analysis. A representative image is shown on the right. Values are mean ± s.d. of at least 10 cells per mouse (n = 3 mice per group). *P≤0.05.(d) The oxygen consumption rate (OCR) in primary hepatocytes isolated from control and Tcfeb-LiKO mice was measured with an XF24 analyser (Seahorse) before and after the addition of palmitic acid (0.2 mM) conjugated with BSA. The vertical red line indicates the time at which palmitate was added to cells. Values are mean ± s.d. for 3 independent experiments *P≤0.05.(e,f) Total FFA (e) and glycerol (f) in the serum isolated from 6-h-fasted Tcfeb-LiKO and control mice. Values are mean ± s.d. (n = 5 mice per group) *P≤0.05 compared with controls.(g) Total serum ketones in fed and fasted Tcfeb-LiKO and control mice. Bars are mean ± s.d. for n = 10 mice per group. **P≤0.01 compared with fed control mice.(h) EchoMRI measurement of fat and lean mass in fed and in 24- and 48-h-fasted mice expressed as relative percentage to fed (100% in the graph). Indicated values are mean ± s.d. for n = 5 mice per group. *P≤0.05;**P≤0.01 compared with fed control mice.(i) Visceral fat pad mass isolated from 2-month-old-mice with indicated genotypes. Indicated values are mean ± s.d. for n = 5 mice per group. *P≤0.05; compared with fed control mice.
figf5(a) Mice with the indicated genotype were kept on a high-fat diet (HFD) for 12 weeks when indicated. Gross liver morphology (upper panel), haematoxylin-eosin (H/E) (middle panel), and oil red O staining of liver sections (bottom panel). Ctrl, control.(b,c) Bar graph showing normalized liver weights (mean ± s.d. for n = 10 mice per group; b) and total lipid content in mice with indicated genotype (mean ± s.d. for n = 10; c). *P≤0.05;***P≤0.001 compared with control.(d) Toluidin blue staining of liver sections isolated from Atg7-LiKO mice injected with HDAd-Ctrl or HDAd-TFEB vector.(e,f) Bar graph showing normalized liver weights (mean ± s.d. for n = 10 mice per group ***P≤0.001; e) and total lipid content in mice with the indicated genotype (mean ± s.d. for n = 5 mice per group; ***P≤0.001; NS, not significant; f). Mice injected with an empty HDAd virus behaved as wild-type untreated mice; therefore, data are not represented in the figure.
figf6(a,b) Body weight (a) and visceral fat mass (b) isolated from 2-month-old-mice with the indicated genotypes. n = 5 mice per group.(c-i) Serum metabolic profile in HDad-TFEB mice compared with control mice.(j,k) Respiratory exchange ratio (RER; VCO2/VO2; j) and fatty acid utilization calculated from data in j (k). Values are mean ± s.d (n = 10 mice per group) *P≤0.05;**P≤0.01; compared with controls. VLDL, very-low-density lipoprotein; HDL, high-density lipoprotein.
figf7(a) Body weight curves of male mice fed with the high-fat diet (HFD; 40% calories from fat) for 10 weeks starting from 5 weeks of age (0 on the x axis). Mice were injected with HDAd-TFEB either 1 week before (early inj), or 4 weeks after, (late inj) being placed on the high-fat diet, as indicated by the arrows. Values are represented as percentages of weight increase. Ctrl, control. (b) Whole-body composition analysis (EchoMRI) of the same mice as in a after 10 weeks of the high-fat diet. In a,b n = 10 mice per group; bars represent mean ± s.d. *P≤0.05;**P≤0.01; ***P≤0.001 compared with control high-fat diet group.(c-f) Total serum insulin, leptin, triglyceride and cholesterol levels in control and HDAd-TFEB mice kept on the high-fat diet for 10 weeks. Value are mean ± s.d. n = 10 add per group. *P≤0.05; ****P≤0.0001 compared with control. (g-i) Glucose and insulin tolerance tests in control and HDAd-TFEB mice challenged with the high-fat diet for 10 weeks.(g,h) Glucose (g) and serum insulin (h) levels at the indicated time points after glucose challenge. (i) Glucose levels at the indicated time points after insulin challenge. In g-i, values are mean ± s.d. n = 7 mice per group; *P≤0.05;**P≤0.01 compared with control. Mice injected with an empty HDAd virus behaved as wild-type untreated mice; therefore, data are not represented in the figure.
figf8(a) hlh-30 quantitative rtPCR showing increased expression of the C. elegans TFEB gene hlh-30 over a time course of starvation in wild-type animals followed by a rapid decrease to the basal level following re-feeding of the animals (mean±s.e.m. of n = 3). *P≤0.05 (t-test, compared with wild-type at t = 0 h).(b) hlh-30 3' UTR quantitative rtPCR showing expression of hlh-30 after 12 h starvation in wild-type and hlh-30(tm1978) animals (mean±s.e.m. of n = 3). *P≤0.05 (t-test, compared with wild-type starved).(c) Quantification of oil red O stain in starved animals relative to well-fed counterparts (mean±s.e.m. of n = 3). **P≤0.01 (t-test, compared with wild-type starved).(d-g) Representative micrographs of wild-type and hlh-30 animals after 8 h starvation and stained with oil red O.(h-k) Representative TEMs of wild-type and hlh-30 animals after 24 h starvation. IEC, intestinal epithelial cell; EPI, epidermis; BB, brush border; GON, gonad; BWM, body wall muscles, aj, apical junction; ld, lipid droplet. Scale bar, 2 μm.(l) Quantitative rtPCR of starvation-induced genes in wild-type and hlh-30 animals after 12 h starvation (means ± s.e.m of n = 3). *P≤0.05; **P≤0.01; ***P≤0.001 (t-test, compared with wild-type starved).(m,n) hlh-30 is required for starvation-induced lifespan extension. One representative experiment of 2 independent trials; error bars represent mean±s.e.m. Median survival (MS) (wild-type fed) = 10 d; MS (wild-type starved) = 17 d, P0.0001 versus fed using the Log-rank test; MS (hlh-30 fed) = 7 d; MS (hlh-30 starved) = 9 d, P0.0001 versus fed.(o) L1 arrest assay showing survival of wild-type and hlh-30 starved animals relative to non-starved conditions (mean±s.e.m. of n = 3). ***P≤0.001 (t-test, compared with wild-type starved).
Figure 1(A-B) Coronal brain section, bregma: - 2.88 from The Mouse Brain Atlas shows the site of injection in the CA1 cell body layer of the right hippocampus (A). 8 h post-injection, majority of the injected Fib-Tau-1N3R-ATTO550 (red) is taken up by the corpus callosum of the injected side (B). Images are shown at low (left, 10X) and high (right, 63X) magnification. Data information: Scale bar, 100µm in the left panel in (B), 10µm everywhere else.Representative images of the distribution of Fib-Tau (red) 8 h and 24 h after injection. Dendrites are immunolabeled using MAP2 antibody (green). 8 h after injection, both diffused and clustered distribution of exogenous Fib-Tau is observed in stratum oriens and CA1 cell body region No exogenous Fib-Tau is detected in the adjoining cortex, stratum radiatum and entrorhinal cortex 24 h after injection, clustered distribution is primarily restricted to the pyramidal (CA) cell body layer (D). Uptake of Fib-Tau is seen in some cells in both stratum oriens and pyramidal cell body layer (D). Paired-t-test performed between '8/24h-right' and '8/24h-left'; Unpaired t-test performed between '8h-left' and '24h-left' columns (n is number of animals: 6 for 8h and 5 for 24h); ***p<0.001, **p<0.01, *p<0.05, ns= not significant. Note: The images presented in panels C and D were independently acquired images under non-identical exposure setting at low magnification for display purpose Data information: Scale bar, 10µmRepresentative images of the distribution of Fib-Tau (red) 8 h and 24 h after injection. Dendrites are immunolabeled using MAP2 antibody (green). 8 h after injection, both diffused and clustered distribution of exogenous Fib-Tau is observed in stratum oriens The number of Fib-Tau clusters per µm2 within stratum oriens decreases between 8 h and 24 h post-injection (G). A similar decrease in the total fluorescence (clusters + diffused) is observed indicating the diffusion and/or clearance of exogenous Fib-Tau (H). Paired-t-test performed between '8/24h-right' and '8/24h-left'; Unpaired t-test performed between '8h-left' and '24h-left' columns (n is number of animals: 6 for 8h and 5 for 24h); ***p<0.001, **p<0.01, *p<0.05, ns= not significant. Panels (E and F) are shown for same exposure and are used for quantification. Data information: Scale bar 10µm
Figure 2(A-C) Time and concentration dependent clustering of Fib-Tau in primary neurons. Representative images are shown for certain conditions to illustrate Fib-Tau clustering time dependence (A, top-row) and concentration dependence (A, bottom-row). Quantification of the number of Fib-Tau clusters per µm2 (B) or fluorescence intensity of clusters At low concentrations (up to 0.72nM) the density of clusters increased with time (between 10 and 60 min) but the increase in intensity was small. At high concentrations of Fib-Tau (≥1.8nM), both density and size increased with increasing time. Box-plot represents: median, interquartile range and 10-90% distribution; One-way ANOVA with Dunnett post-hoc test, number of images analysed from 3 cultures (from left to right: 25, 25, 25, 25, 70, 45, 45, 45, 45, 45, 30, 40, 40, 40, 40 and 40 images). Data information: *p<0.05; **p<0.01; ***p<0.001; ns= not significant. Scale bar 2µm(D-F) Single Particle Tracking using Quantum Dots (SPT-QD) of biotin tagged Fib-Tau. Representative single molecule trajectories of Fib-Tau following 10 or 60 min exposure are shown (D). Note after 60min exposure (0.36nM), single molecules are more confined suggesting they are trapped and clustered. Quantification of diffusion coefficient (E) and explored area (F, extracted from mean squared displacement (MSD), see methods) shows that both these parameters decrease after 60min exposure to Fib-Tau. Unpaired t-test, n is averaged value per cells imaged in 3 experiments (10 min: 22, 60 min: 23). Data information: *p<0.05; **p<0.01; ***p<0.001; ns= not significant. Scale bar, 2µm(G) Neurons were exposed for 60 min to Fib-Tau (0.36nM) labeled both with biotin and ATTO488 (red). Cell surface exposed biotin was labelled using streptavidin-550 (green) followed by live imaging. Note that most of the clusters of ATTO488 (red) are co-labelled with Streptavidin 550 (green) indicating that the clusters are at the cell surface. Data information: *p<0.05; **p<0.01; ***p<0.001; ns= not significant. Scale bar, 5µm(H-J) Clearance of Tau clusters from neurons. Neurons were exposed (0.36nM) to ATTO 550 labeled Fib-Tau for 10 min and the unbound fibrils were washed. Cells were fixed immediately (10min) or allowed to recover in culture medium for 60 min. Two representative images (H) and quantifications (I, J) show that following 60 min recovery most of the Tau clusters disappear/dissociate as indicated by a decrease in their density. Box-plot represents: median, interquartile range and 10-90% distribution, Unpaired t-test, n is number of images analyzed from 3 cultures (49 images). Data information: *p<0.05; **p<0.01; ***p<0.001; ns= not significant. Scale bar 2µm
Figure 4(D) List of synaptic and plasma membrane proteins with extracellular domains significantly enriched in pull-downs from neurons exposed to Fib-Tau. For each identified protein, the name of the protein, the gene name, the p-value (t-test with Benjamini-Hochberg correction), and the fold change corresponding to the ratio of spectral counts between exposed neuron and control samples are given. In an independent analysis, after 10 min exposure of neurons to biotinylated Fib-Tau, a cross-linking step was performed during 20 min using 1mM of DTSSP added in the culture medium, in order to cross-link the protein complexes formed at the cell surface using a membrane impermeable cross-linker. After cross-linking, proteins were analyzed and identified exactly as non-cross-linked samples. Proteins identified with at least 2 peptides are labeled "+", the other are labeled "-".(E). Co-immunoprecipitation of exogenous biotin-labelled Fib-Tau with α3-NKA, GluA2 and GluN1. α3-NKA, GluA2 and GluN1 were immunoprecipitated using specific antibodies as described in the methods section. The presence of Fib-Tau in the immunoprecipitate was assessed using a slot blot apparatus and nitrocellulose membranes probed with streptavidin-HRP. A 2.4-, 2.3-, and 1.8- fold enrichment in Tau band-intensity is observed in α3-NKA, GluA2 and GluN1 immunoprecipitates, respectively, compared to controls performed with pre-immune goat or rabbit IgGs. Co-immunoprecipitates of exogenous biotin-labelled Fib-Tau with anti α3-NKA, GluA2 and GluN1 specific antibodies were also subjected to SDS-PAGE and Western blot analysis. The presence of Fib-Tau in the immunoprecipitates was assessed by probing the nitrocellulose membranes with streptavidin-HRP. Fib-Tau co-immunoprecipitates with α3-NKA and GluA2-AMPA receptor but not with GluN1-NMDA receptor.
Figure 5(A, B) Primary neurons were exposed to Fib-Tau-ATTO550 (0.36nM, red) for 10 (top row) or 60 min (bottom row) and excitatory (Homer, green) and inhibitory synapses (Gephyrin, blue) were immuno-labelled. Fib-Tau clusters co-localized and/or apposed to Homer (arrowheads) but not Gephyrin (A). Quantitative analysis shows that 10 to 20% of Fib-Tau clusters are localized at Homer containing synapses (B). Box-plot represents: median, interquartile range and 10-90% distribution, Unpaired t-test to compare difference between 10 and 60 min, n is number of images analyzed from 3-experiments (10 min: 49; 60 min: 50). Scale bar, 5µm.Exposure of neurons to Fib-Tau-ATTO550 (0.36nM, 60 min, red) and immuno-labelling of excitatory synapse (Anti-Rabbit-Homer or Anti-Mouse-PSD, blue) and α3-NKA or GluA1-AMPA or GluA2-AMPA or GluN1-NMDA or GluN2B-NMDA subunits (green, post-permeabilization). Arrows indicate excitatory synapses where Fib-Tau and α3-NKA/AMPA/NMDA are co-localized (C). Mann-Whitney-test, n is number of images analyzed from 3-4 experiments (α3-NKA: 75; GluA1: 95; GluA2: 50; GluN1/N2B: 45).Exposure of neurons to Fib-Tau-ATTO550 (0.36nM, 60 min, red) and immuno-labelling of excitatory synapse (Anti-Rabbit-Homer or Anti-Mouse-PSD, blue) and α3-NKA or GluA1-AMPA or GluA2-AMPA or GluN1-NMDA or GluN2B-NMDA subunits (green, post-permeabilization). Quantification of the fluorescence intensity (indicating size of clusters of synaptic α3-NKA/AMPA/NMDA spots (obtained after thresholding) following exposure to Fib-Tau showed a reduction in the size of α3-NKA and increase in the size of GluA2-subunit containing AMPA receptors (D). Box-plot represents: median, interquartile range and 10-90% distribution, **p<0.01; ns= not significant. Scale bar, 5µm.