Discovery of a Drug Candidate for GLIS3-Associated Diabetes
Ontology highlight
ABSTRACT:
PROVIDER: PRJNA463329 | ENA |
REPOSITORIES: ENA
Dataset's files
| Action | DRS | |||
|---|---|---|---|---|
| SRR7120590.fastq.gz | Fastqsanger.gz | |||
| SRR7120600.fastq.gz | Fastqsanger.gz | |||
| SRR7120591.fastq.gz | Fastqsanger.gz | |||
| SRR7120601.fastq.gz | Fastqsanger.gz | |||
| SRR7120592.fastq.gz | Fastqsanger.gz |
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Project description:Through development and use of a minimal component protocol for derivation of late stage pancreatic progenitors and beta-like cells, we compared WT and GLIS3-/- pancreatic cells at different stages and discovered that GLIS3-/- cells show an ectopic activation of TGF-beta signaling.
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Project description:GLIS3 mutations are associated with type 1, type 2, and neonatal diabetes, reflecting a key function for this gene in pancreatic ?-cell biology. Previous attempts to recapitulate disease-relevant phenotypes in GLIS3-/- ?-like cells have been unsuccessful. Here, we develop a "minimal component" protocol to generate late-stage pancreatic progenitors (PP2) that differentiate to mono-hormonal glucose-responding ?-like (PP2-?) cells. Using this differentiation platform, we discover that GLIS3-/- hESCs show impaired differentiation, with significant death of PP2 and PP2-? cells, without impacting the total endocrine pool. Furthermore, we perform a high-content chemical screen and identify a drug candidate that rescues mutant GLIS3-associated ?-cell death both in vitro and in vivo. Finally, we discovered that loss of GLIS3 causes ?-cell death, by activating the TGF? pathway. This study establishes an optimized directed differentiation protocol for modeling human ?-cell disease and identifies a drug candidate for treating a broad range of GLIS3-associated diabetic patients.
| S-EPMC6041295 | biostudies-literature
Project description:A robust system using disease relevant cells to systematically evaluate the role in diabetes for loci identified through genome wide association studies (GWAS) is urgently needed. Toward this goal, we created isogenic mutant human embryonic stem cell (hESC) lines in GWAS-identified candidate diabetes genes including CDKAL1, KCNQ1 and KCNJ11, and used directed differentiation to evaluate the function of derivative human beta-like cells. The mutations did not affect the generation of insulin+ cells, but impaired insulin secretion both in vitro and in vivo, coinciding with defective glucose homeostasis. CDKAL1-/- insulin+ cells also displayed hypersensitivity to lipotoxicity. A high-content chemical screen identified a candidate drug that rescued CDKAL1-/--specific defects by inhibiting the AP1 (FOS/JUN) pathway. These studies establish a platform using isogenic hESCs to evaluate the function of GWAS-identified loci, and identify a drug candidate that rescues gene-specific defects, paving the way to precision therapy of metabolic diseases.A robust system using disease relevant cells to systematically evaluate the role in diabetes for loci identified through genome wide association studies (GWAS) is urgently needed. Toward this goal, we created isogenic mutant human embryonic stem cell (hESC) lines in GWAS-identified candidate diabetes genes including CDKAL1, KCNQ1 and KCNJ11, and used directed differentiation to evaluate the function of derivative human beta-like cells. The mutations did not affect the generation of insulin+ cells, but impaired insulin secretion both in vitro and in vivo, coinciding with defective glucose homeostasis. CDKAL1-/- insulin+ cells also displayed hypersensitivity to lipotoxicity. A high-content chemical screen identified a candidate drug that rescued CDKAL1-/--specific defects by inhibiting the AP1 (FOS/JUN) pathway. These studies establish a platform using isogenic hESCs to evaluate the function of GWAS-identified loci, and identify a drug candidate that rescues gene-specific defects, paving the way to precision therapy of metabolic diseases.
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Project description:Loss of transcription factor GLIS3 function in humans and mice leads to the development of neonatal polycystic kidney disease (PKD). To investigate how loss of GLIS3 function in kidney affects postnatal kidney development and PKD, we analyzed the gene expression profiles of kidneys from WT and Glis3-null mice at P7, P14, and P28 by RNA-Seq analysis using Glis3 global KO model Glis3-mCherry and kidney specific knockout model Glis3-PAX8Cre.
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Project description:The expression of Glis3 in C3H10T1/2 cells promotes osteoblastic differentiation as indicated by the the induction of increase in alkaline phosphatase activity, an early marker of osteoblast differentiation, and increased expression of osteopontin, a late marker of osteogenesis. Glis3 acts synergistically with bone morphogenic protein 2 (BMP-2). In contrast, expression of Glis3 inhibits the induction of adipocyte differentiation. Microarray analysis identified the fibroblast growth factor 18 (FGF18) as one of the genes induced by Glis3 in C3H10T1/2 cells directly. Keywords: Glis3, osteoblast differentiation, adipocyte differentiation, FGF18, BMP2
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Project description:The serum hormone levels including T3 and T4 were dramatically decreased in Glis3-null mice due to reduced production of thyroid hormones in thyroid. Gene expression profile and EdU incorporation analysis between WT and Glis3-null mice showed that the cell proliferation was greatly reduced in Glis3-null thyroid. Goitergenic diet (low iodine diet; LID) dramatically enhanced serum TSH levels in both WT and Glis3-null mice, however thyroid goiter was observed in WT mice but not in Glis3-null mice. A subset of genes associated with thyroid hormone production including Pendrin (Slc26a4), Nis (Na+/I– symporter, Slc5a5), Duoxa2 (dualoxidase A2), Tpo (thyroperoxidase), and Dio1 (Deiodinase1) was significantly induced in WT but not in Glis3-null mice by LID feeding.
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Project description:RNA sequencing of mouse islets from mice containing a pancreas-specific deletion of Glis3, and control littermates. Also, ChIP-seq analysis of Glis3 binding using a Glis3-eGFP mouse (endogenous Glis3 fused to enhanced GFP) and GFP antibody.
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Project description:Adult pancreatic progenitor cells are a potential source of renewable insulin producing cells that can be used in regenerative medicine and cell replacement therapy for type-1 diabetes. We sought to understand the mechanisms by which adult pancreatic progenitor cells undergo self-renewal. The effects of knockdown of Glis3, CD133 (Prominin-1) and beta-catenin were investigated and we found that Glis3 and CD133 are capable of regulating self-renewal through Wnt gene expression.
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Project description:Today, novel candidate therapeutics are identified in an environment which is intrinsically different from the clinical context in which they are ultimately evaluated. We present a strategy that allows biological relevance to be assessed in the early stages of drug discovery. Using molecular phenotyping and an in vitro model of diabetic cardiomyopathy, we show that by quantifying pathway reporter gene expression, molecular phenotyping can cluster compounds based on pathway profiles and dissect associations between pathway activities and disease phenotypes simultaneously. Molecular phenotyping identified a class of calcium-signaling modulators that can reverse disease-regulated pathways and phenotypes, which was validated by structurally distinct compounds of relevant classes. The technique was applicable to compounds with a range of binding specificities and detected false-positive hits missed by classical phenotypic assays. Our results advocate application of molecular phenotyping in drug discovery, promoting biological relevance as a key selection criterion early in the drug development cascade.
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