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We found the most prominent alcohol-induced DNA methylation changes in the in vitro-cultured ectodermal cells (blue) compared to the endodermal (yellow) and mesodermal cells (green). Horizontal dashed lines indicate FDR<0.05.
Published: 18 June 2025
We found the most prominent alcohol-induced DNA methylation changes in the in vitro -cultured ectodermal cells (blue) compared to the endodermal (yellow) and mesodermal cells (green). Horizontal dashed lines indicate FDR<0.05. More about this image found in We found the most prominent alcohol-induced DNA methylation changes in the ...
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Differential gene expression in 70 mM EtOH-exposed germ layer cells. (A-C) Volcano plots showing the effect of 70 mM EtOH exposure on (A) mRNA expression in endodermal cells (control n=4, EtOH n=3), (B) mesodermal cells (control and EtOH n=3) and (C) ectodermal cells (control and EtOH n=4). Horizontal dashed lines indicate FDR&lt;0.05. Common significantly altered genes between DNAm and mRNA-seq analyses in each germ layer are given in bold. Endodermal (orange), mesodermal (green) and ectodermal (blue) cells.
Published: 18 June 2025
Fig. 1. Differential gene expression in 70 mM EtOH-exposed germ layer cells. (A-C) Volcano plots showing the effect of 70 mM EtOH exposure on (A) mRNA expression in endodermal cells (control n =4, EtOH n =3), (B) mesodermal cells (control and EtOH n =3) and (C) ectodermal cells (control and E... More about this image found in Differential gene expression in 70 mM EtOH-exposed germ layer cells. (A-C)...
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Gene expression pathways and common genes of 70 mM EtOH-exposed germ layer cells. (A) Significantly enriched terms identified in GO:BP enrichment analysis of 70 mM EtOH-induced DEGs in endodermal cells (FDR-corrected P-value&lt;0.05). The ten most significant pathways are shown. (B) Venn diagram showing the number of 70 mM EtOH-induced DEGs that are common between germ layers. (C) Significantly enriched terms identified in GO:BP enrichment analysis of 70 mM EtOH-induced DEGs in ectodermal cells (FDR-corrected q-value&lt;0.05). The ten most significant pathways are shown. Endodermal cells: control n=4, EtOH n=3; mesodermal cells: control and EtOH n=3; ectodermal cells: control and EtOH n=4.
Published: 18 June 2025
Fig. 2. Gene expression pathways and common genes of 70 mM EtOH-exposed germ layer cells. (A) Significantly enriched terms identified in GO:BP enrichment analysis of 70 mM EtOH-induced DEGs in endodermal cells (FDR-corrected P -value<0.05). The ten most significant pathways are shown. (B) Ve... More about this image found in Gene expression pathways and common genes of 70 mM EtOH-exposed germ layer ...
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Differential DNAm of 70 mM EtOH-exposed germ layer cells. (A-C) Volcano plots showing the effect of 70 mM EtOH exposure on DNAm in (A) endodermal cells, (B) mesodermal cells and (C) ectodermal cells Horizontal dashed lines indicate FDR&lt;0.05. Control and EtOH n=4/germ layer. Common significantly altered genes between DNAm and mRNA-seq analyses in each germ layer are given in bold. Endodermal (orange), mesodermal (green) and ectodermal (blue) cells.
Published: 18 June 2025
Fig. 3. Differential DNAm of 70 mM EtOH-exposed germ layer cells. (A-C) Volcano plots showing the effect of 70 mM EtOH exposure on DNAm in (A) endodermal cells, (B) mesodermal cells and (C) ectodermal cells Horizontal dashed lines indicate FDR<0.05. Control and EtOH n =4/germ layer. Common s... More about this image found in Differential DNAm of 70 mM EtOH-exposed germ layer cells. (A-C) Volcano pl...
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DNAm pathways and common DMPs of 70 mM EtOH-exposed germ layer cells. (A) Significantly enriched terms identified in GO:BP enrichment analysis of 70 mM EtOH-induced DMPs in endodermal cells (P&lt;0.05). The ten most significant pathways are shown. (B) Significantly enriched terms identified in GO:BP enrichment analysis of 70 mM EtOH-induced DMPs in ectodermal cells (P&lt;0.05). The ten most significant pathways are shown. (C) Venn diagram showing the number of 70 mM EtOH-induced DMPs that are in common between germ layers. Control and EtOH n=4/germ layer.
Published: 18 June 2025
Fig. 4. DNAm pathways and common DMPs of 70 mM EtOH-exposed germ layer cells. (A) Significantly enriched terms identified in GO:BP enrichment analysis of 70 mM EtOH-induced DMPs in endodermal cells ( P <0.05). The ten most significant pathways are shown. (B) Significantly enriched terms ident... More about this image found in DNAm pathways and common DMPs of 70 mM EtOH-exposed germ layer cells. (A) ...
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Altered metabolites in 70 mM EtOH-exposed germ layers. (A-C) Volcano plots showing the effect of 70 mM EtOH exposure on extracellular metabolites in (A) endodermal cells, (B) mesodermal cells and (C) ectodermal cells. Horizontal line marks P-value &lt;0.05. (D) Venn diagram showing the numbers of 70 mM EtOH-induced alterations in annotated metabolites. (E) Significantly enriched terms identified in SMPDB metabolite set enrichment analyses of all EtOH-induced annotated metabolites (P&lt;0.05). The ten most significant pathways are shown (FDR&lt;0.05). 5′-MTA, 5′-methylthioadenosine; 7-Hoca, 7a-hydroxy-3-oxo-4-cholestenoic acid; GB, glycine betaine; GSH, reduced glutathione; LPC, lysophosphocholine; NAD+, nicotinamide adenine dinucleotide; NAM, N-acetylmethionine; M1A, 1-methyladenosine; M22G, N2,N2-dimethylguanosine; SAM, S-adenosylmethionine; γ-Glu-Cys, γ-glutamyl-cysteine; γ-Glu-Gln, γ-glutamyl-glutamine. Endodermal and mesodermal cells: control and EtOH n=4, ectodermal cells: control and EtOH n=5. Endodermal (orange), mesodermal (green) and ectodermal (blue) cells.
Published: 18 June 2025
Fig. 5. Altered metabolites in 70 mM EtOH-exposed germ layers. (A-C) Volcano plots showing the effect of 70 mM EtOH exposure on extracellular metabolites in (A) endodermal cells, (B) mesodermal cells and (C) ectodermal cells. Horizontal line marks P -value <0.05. (D) Venn diagram showing the... More about this image found in Altered metabolites in 70 mM EtOH-exposed germ layers. (A-C) Volcano plots...
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Schematic of EtOH-induced alterations in metabolites of the methionine metabolism. Arrowheads indicate significant EtOH-induced alterations in both exposures (20 and 70 mM EtOH) or in 70 mM EtOH exposure only. Arrowheads annotated with an asterisk indicate significant EtOH-induced alterations in 20 mM EtOH exposure only. Arrowhead colors indicate endodermal (orange), mesodermal (green) and ectodermal (blue) cells. Endodermal and mesodermal cells: control and EtOH n=4, ectodermal cells: control and EtOH n=5. 5′-MTA, 5′-methylthioadenosine; B6, vitamin B6; GSH, reduced glutathione; GSSG, oxidized glutathione; NAM, N-acetylmethionine; SAM, S-adenosylmethionine; γ-Glu-Cys, γ-glutamyl-cysteine. Created in BioRender by Wallén, E. (2025). https://BioRender.com/oqmd5jx. This figure was sublicensed under CC-BY 4.0 terms.
Published: 18 June 2025
Fig. 6. Schematic of EtOH-induced alterations in metabolites of the methionine metabolism. Arrowheads indicate significant EtOH-induced alterations in both exposures (20 and 70 mM EtOH) or in 70 mM EtOH exposure only. Arrowheads annotated with an asterisk indicate significant EtOH-induced altera... More about this image found in Schematic of EtOH-induced alterations in metabolites of the methionine meta...
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A Ldh+ cell population arises in fly scrib and dlg mutant tumors over time. (A) Uniform manifold approximation and projection plot of scrib mutant wing disc single cells from different times (left) and expression of the Ldh gene (right). (B) Control and dlg mutant imaginal discs expressing a Ldh-GFP enhancer trap reporter. AEL, after egg laying. Scale bars: 10 μm. (C) Quantification of Ldh+ cell percentage in the control and dlg mutant imaginal discs. For B and C, control genotype: FRT19A; c855aGal4 Ldh-GFP, 5 days AEL, n=25. Experimental group genotype: dlgGH19; c855aGal4 Ldh-GFP, 14 days AEL, n=19. Data represent mean±s.d., with statistical analysis conducted using unpaired two-tailed t-test. ****P&lt;0.0001. (D) Control and dlg mutant imaginal discs expressing R-iLACCO1, a lactate sensor. Control genotype: c855aGal4/R-iLACCO1, 5 days AEL, 24/31, n=31. Experimental group genotype: dlgGH19; c855aGal4 Ldh-GFP/R-iLACCO1, 14 days, 21/21, n=21. Scale bars: 10 μm. (D′) Quantification of Ldh+ RFP+ cell percentage in RFP+ cells. Data represent mean±s.d.
Published: 16 June 2025
Fig. 1. A Ldh + cell population arises in fly scrib and dlg mutant tumors over time. (A) Uniform manifold approximation and projection plot of scrib mutant wing disc single cells from different times (left) and expression of the Ldh gene (right). (B) Control and dlg mutant imaginal di... More about this image found in A Ldh + cell population arises in fly scrib and dlg mutant tumors over...
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Systemic depletion of acetyl-CoA leads to a reduction in histone acetylation levels and stochastic silencing of actively transcribed genes in dlg mutant tumors. (A) Plot of metabolic gene expression changes from the scrib mutant tumor time-series transcriptomics data (color coded in squares) and metabolite concentration changes between the 13-day dlg mutant larvae and control larvae (color coded in circles) for glycolysis, the tricarboxylic acid (TCA) cycle and oxidative phosphorylation. The gene expression change slope value and metabolite concentration fold change value are color coded. (B) Plot of acetyl-CoA concentration in the control and dlg mutant larvae. Control group genotype: FRT19A, 5 days AEL. Experimental group genotype: dlgGH19, 13 days AEL. Four repeats per group. Data represent mean values with individual data points overlaid. Statistical analysis was performed using the Wilcoxon rank sum test. ****P&lt;0.0001. (C) Western blot of H3K27ac and H3K9ac from the control imaginal discs and dlg mutant tumors. (D) Control and dlg mutant imaginal discs stained for H3K27ac and H3K9ac. Control genotype: FRT19A, 5 days AEL. Experimental group genotype: dlgGH19, 14 days AEL. H3K27ac, control, n=18, dlgGH19, n=20; H3K9ac, control, n=22, dlgGH19, n=15; Scale bars: 10 μm. (E) Control and dlg mutant imaginal discs expressing a tubGal80; tubGal4 UAS-GFP reporter. Detection of GFP+ cells is indicative of loss of tubGal80 expression. Control genotype: ywFRT19A/Y; FRT40A tubGal80/+; tubGal4 UAS-GFP/+, n=21, 5 days AEL. Experimental group genotype: dlgGH19FRT19A/Y; FRT40A tubGal80/+; tubGal4 UAS-GFP/+, n=33, 32/33, 14 days AEL. Scale bars: 10 μm.
Published: 16 June 2025
Fig. 2. Systemic depletion of acetyl-CoA leads to a reduction in histone acetylation levels and stochastic silencing of actively transcribed genes in dlg mutant tumors. (A) Plot of metabolic gene expression changes from the scrib mutant tumor time-series transcriptomics data (color coded in ... More about this image found in Systemic depletion of acetyl-CoA leads to a reduction in histone acetylatio...
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Systemic depletion of S-adenosyl methionine leads to a reduction in H3K9me3 levels and transposon activation in fly tumors. (A) Plot of gene expression changes from the scrib mutant tumor time-series transcriptomics data (color coded in squares) and metabolite concentration changes between the 13-day dlg mutant larvae and control larvae (color coded in circles) in the methionine cycle. (B) Plot of S-adenosyl methionine (SAM) concentration in the control and dlg mutant larvae. Control group genotype: FRT19A, 5 days AEL. Experimental group genotype: dlgGH19, 13 days AEL. Four repeats per group. Data represent mean values with individual data points overlaid. Statistical analysis was performed using the Wilcoxon rank sum test. ****P&lt;0.0001. (C) Western blot of H3K9me3 from control and dlg mutant imaginal discs. (D) Control and dlg mutant imaginal discs stained for H3K9me3. Control genotype: FRT19A, 5 days AEL, n=21. Experimental group genotype: dlgGH19, 14 days AEL, n=16. Scale bars: 10 μm. (E) Heatmap of transposon expression data from the 4-day, 5-day and 14-day AEL scrib mutant wing imaginal discs. (F) Bar plot of transposition events mapped in the 4-day, 8-day and 14-day AEL scrib mutant wing imaginal discs. (G) Control and scrib mutant imaginal discs expressing an I-element-eGFP reporter. Control genotype: I-element-eGFP; FRT82B, n=23, 5 days AEL. Experimental group genotype: I-element-eGFP; scrib1 FRT82B, n=29, 13/29, 14 days AEL. Scale bars: 10 μm. (H) Imaginal discs of stained for H3K9me3 (red) and DNA (blue). Scale bars: 10 μm. (H′) Quantification of tumor sizes for the dlg mutant tumors in the control, AhcyL1RNAi and AhcyL2RNAi groups. Control genotype: dlgGH19; c855aGal4/+, 10 days AEL, n=21. Experimental group genotypes: dlgGH19; c855aGal4/AhcyL1RNAi, 10 days AEL, n=15. dlgGH19; AhcyL2RNAi/+; c855aGal4/+, 10 days AEL, n=21. Data represent mean±s.d., with statistical analysis conducted using one-way ANOVA. ****P&lt;0.0001.
Published: 16 June 2025
Fig. 3. Systemic depletion of S-adenosyl methionine leads to a reduction in H3K9me3 levels and transposon activation in fly tumors. (A) Plot of gene expression changes from the scrib mutant tumor time-series transcriptomics data (color coded in squares) and metabolite concentration changes bet... More about this image found in Systemic depletion of S-adenosyl methionine leads to a reduction in H3K9me3...
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The metabolic gene expression signatures of fly and human tumors. (A) Schematic view of using gene expression data from fly and human tumor samples to identify human tumor samples that metabolically resemble fly tumors. RNA-seq, RNA-sequencing; ssGSEA, single-sample gene-set enrichment analysis. (B) Plot of the distribution of adjusted P-values for metabolic similarity tests between human tumor samples and the fly scrib mutant tumors. P-values are calculated by Pearson correlation test. Human tumor samples with P-values lower than 1×10−6 (colored in red) are recognized as samples with significantly similar metabolic patterns to fly tumors. (C) 765 out of 10,501 human tumor samples exhibit metabolic signatures similar to those of fly tumors based on P-values of Pearson correlation test. (D) Patients with tumors metabolically similar to the fly tumors are significantly younger than others. Data represent distribution of patient age of two human tumor groups, and P-value is calculated by unpaired two-tailed t-test. (E) Human tumor samples metabolically similar to the fly tumors acquire a significantly lower number of mutations than other samples. Data represent log2-transformed count number of mutation events detected in two human tumor groups, and P-value is calculated by unpaired two-tailed t-test. (F) Human tumor samples metabolically similar to the fly tumors show a lower level of DNA methylation than other samples. Data show average beta-values, which represent the DNA methylation level of two human tumor groups, and P-value is calculated by unpaired two-tailed t-test. (G) Mutation landscape of human tumor samples metabolically similar to the fly tumors. Dots in the upper panel represent mutation events, which are significantly enriched in the metabolically similar tumor group, while dots in the lower panel are events enriched in the non-similar tumor group. P-values in the y-axis are calculated by Fisher's exact test, which evaluates whether one mutation event is correlated with tumor metabolic pattern. Dots with P-values lower than 1×10−3 are colored in red/blue and represent mutation events that are significantly enriched or lost in the metabolically similar tumor group.
Published: 16 June 2025
Fig. 4. The metabolic gene expression signatures of fly and human tumors. (A) Schematic view of using gene expression data from fly and human tumor samples to identify human tumor samples that metabolically resemble fly tumors. RNA-seq, RNA-sequencing; ssGSEA, single-sample gene-set enrichment a... More about this image found in The metabolic gene expression signatures of fly and human tumors. (A) Sche...
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fzd5 is expressed in the optic primordium throughout eye formation. (A-D) Dorsal (A-C) or ventral (D) views, with anterior to the left, at the stage indicated in each panel. Dotted outlines in A and B highlight the optic vesicles. Brackets in D highlight the ciliary marginal zone (CMZ). (E) Schematic of the transcription activator-like effector nucleases (TALENs; t1 and t2) and guide RNAs (g1 to g4) used to generate the fzd5 mutant alleles for this study, and their predicted protein products. aa, amino acids; hpf, h post-fertilisation; hyp, hypothalamus; ov, optic vesicles; vt, ventral telencephalon. Scale bars: 100 µm.
Published: 10 June 2025
Fig. 1. fzd5 is expressed in the optic primordium throughout eye formation. (A-D) Dorsal (A-C) or ventral (D) views, with anterior to the left, at the stage indicated in each panel. Dotted outlines in A and B highlight the optic vesicles. Brackets in D highlight the ciliary marginal zone (CMZ)... More about this image found in fzd5 is expressed in the optic primordium throughout eye formation. (A-D)...
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The Fzd5sgu3 protein fails to localise to the cell membrane. (A-K) Cell membrane localisation of wild-type Fzd5-RFP (wt-fzd5-RFP; magenta in A,B,G-I; grey in C; arrowheads in C,G,I) and punctate cytoplasmic accumulation of Fzd5sgu3-RFP (magenta in D,E,J,K; grey in F; arrowheads in F,K) in 4 hpf embryos injected with the corresponding mRNA (A-F), or in HEK293 cells transfected with the corresponding DNA construct (G-K). Embryos were counterstained with phalloidin-488 to reveal cell outlines (green) and Hoechst to reveal cell nuclei (blue). (L) Fold change in luciferase activity of HEK293 cells transfected with lrp6+wt-fzd5-myc and lrp6+fzd5sgu3-myc normalised to activity of lrp6 alone. (M) Fold change in luciferase activity of co-transfections with lrp6+wt-fzd5-myc and increasing levels of fzd5sgu3-myc normalised to activity of lrp6+wt-fzd5-myc alone. Pairwise multiple Student’s t-test comparison between conditions in L and M reveal statistically significant changes in luciferase activity (L, P=0.002; M, P=0.007, P=0.003, P=0.091 from left to right). ns, not significant; **P&lt;0.01. Data pooled from three experiments with four replicates each. Scale bars: 50 µm (A-F) or 10 µm (G-K).
Published: 10 June 2025
Fig. 2. The Fzd5 sgu3 protein fails to localise to the cell membrane. (A-K) Cell membrane localisation of wild-type Fzd5-RFP ( wt-fzd5 -RFP; magenta in A,B,G-I; grey in C; arrowheads in C,G,I) and punctate cytoplasmic accumulation of Fzd5 sgu3 -RFP (magenta in D,E,J,K; grey in F; arrowheads in ... More about this image found in The Fzd5 sgu3 protein fails to localise to the cell membrane. (A-K) Cell ...
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Subtle eye defects in fzd5sgu1, MZfzd5sgu1 and fzd5sgu3 embryos. (A) MZfzd5sgu1 and fzd5sgu3 3 days post-fertilisation (dpf) larvae morphology compared to that of wild-type and heterozygote siblings. (B) Quantifications of projected eye area in the genotypic groups from A. Box plots represent the median and 25-75th percentiles; whiskers indicate the range of the data. Each data point represents one eye. A pairwise Tukey HSD post-hoc test revealed statistically significant eye size differences between the wild-type and the MZfzd5sgu1 group (P=0.006748), and between the fzd5sgu3 homozygote and heterozygote group (P=0.01591). ns, not significant; *P&lt;0.05, **P&lt;0.01. (C-J) Expression of fzd5 in the CMZ (C,D) and pax2.1 in the optic stalk/optic nerve (E-J) in fzd5sgu1 (D,F,H), MZfzd5sgu1 (I) and fzd5sgu3 (J) embryos compared to wild-type controls (C,E,G). Embryo age is indicated in each panel. Scale bars: 100 µm.
Published: 10 June 2025
Fig. 3. Subtle eye defects in fzd5 sgu1 , MZfzd5 sgu1 and fzd5 sgu3 embryos. (A) MZfzd5 sgu1 and fzd5 sgu3 3 days post-fertilisation (dpf) larvae morphology compared to that of wild-type and heterozygote siblings. (B) Quantifications of projected eye area in the genotypic groups fr... More about this image found in Subtle eye defects in fzd5 sgu1 , MZfzd5 sgu1 and fzd5 sgu3 embryos...
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fzd5sgu1 and fzd5sgu3 are genetically sensitised to developing eye malformations. (A,B,D-F,H,I) Lateral views, with anterior to the left, of 72 hpf embryos treated with DMSO (A,D,H) or XAV-939 (B,E,F,I). Colobomas (arrows in B,F,I) are evident in a subset of embryos derived from the incross of fzd5sgu1/+ (B), MZfzd5sgu1 (F) and fzd5sgu3/+ XAV-939-treated embryos (I), a phenotype never observed in wild-type XAV-939-treated embryos (E). (C,G,J) Quantification of phenotypes observed, and their associated genotypes, in XAV-939-treated embryos derived from fzd5sgu1/+ incross (C), wild-type or MZfzd5sgu1 incross (G) and fzd5sgu3/+ incross (J). Scale bar: 500 µm.
Published: 10 June 2025
Fig. 4. fzd5 sgu1 and fzd5 sgu3 are genetically sensitised to developing eye malformations. (A,B,D-F,H,I) Lateral views, with anterior to the left, of 72 hpf embryos treated with DMSO (A,D,H) or XAV-939 (B,E,F,I). Colobomas (arrows in B,F,I) are evident in a subset of embryos derived from ... More about this image found in fzd5 sgu1 and fzd5 sgu3 are genetically sensitised to developing eye m...