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RNA seq analysis of calcium channel blocker, nifedipine in combination with metformin, MCC950 and anakinra treated Tet2-/- + Boy/J (1:1 ratio, mixed BM cells) transplanted Ob/Ob recipient mice

ABSTRACT: Characterized by the accumulation of somatic mutations in blood cell lineages, clonal hematopoiesis (CH) of indeterminate potential (CHIP) involves expansion of mutated hematopoietic stem and progenitor cells (HSC/Ps) that leads to an increased risk of hematologic malignancy and cardiovascular disease (CVD). However, risk factors that contribute to CHIP-associated CH are poorly understood. A common, pro-inflammatory comorbidity responsible for enhancing the risk for developing type 2 diabetes mellitus (T2DM), CVD and cancer, obesity may exacerbate CHIP-associated diseases. We analyzed exome sequencing and clinical data from 47,466 individuals with valid CHIP in the UK Biobank. CHIP was present in 5.8% of the study population, and was associated with a significant increase in waist-to-hip ratio (WHR). The cancer genome atlas (TCGA) interrogation revealed that the mutation rate of CHIP is higher in patients with high BMI (>30 kg/m2) compared to those with low BMI (≤25 kg/m2) in six different cancer types. Utilizing mouse models of obesity bearing CHIP mutations, we show that both the compound mutant mice (Tet2-/-;Ob/Ob, Dnmt3a+/-;Ob/Ob) and CHIP mutant bone marrow (BM; Tet2-/-, Dnmt3a+/-, Asxl1+/- and Jak2+/-) transplanted into Ob/Ob mice develop rapid CH, leading to severe MPN/AML as well as CVD, which among other things, is associated with upregulation of intracellular calcium (Ca2+) levels and pro-inflammatory cytokines. Remarkably, calcium channel blocker nifedipine, in combination with metformin, MCC950 and anakinra, suppressed the growth of mutant CHIP cells, cardiovascular disease and restored normal hematopoiesis as well as serum Ca2+ and inflammatory cytokines. Thus, obesity is highly associated with the presence of CHIP and targeting CHIP mutant cells with a combination of metformin/nifedipine/MCC950/anakinra is a safe and inexpensive approach to treat CH and its associated abnormalities in obese individuals.

ORGANISM(S): Mus musculus

PROVIDER: GSE193062 | GEO | 2022/01/08

REPOSITORIES: GEO

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Project description:The expression of adipogenic genes is decreased in obesity and diabetes mellitus ; Samuel T. Nadler*, Jonathan P. Stoehr*, Kathryn L. Schueler*, Gene Tanimoto, Brian S. Yandell, and Alan D. Attie*,Â§ ; Departments of * Biochemistry, and Statistics and Horticulture, University of Wisconsin, Madison, WI, 53706; and Affymetrix, Inc., Santa Clara, CA 95051 ; Communicated by Neal L. First, University of Wisconsin, Madison, WI, July 13, 2000 (received for review April 3, 2000) ; Obesity is strongly correlated with type 2 diabetes mellitus, a common disorder of glucose and lipid metabolism. Although adipocytes are critical in obesity, their role in diabetes has only recently been appreciated. We conducted studies by using DNA microarrays to identify differences in gene expression in adipose tissue from lean, obese, and obese-diabetic mice. The expression level of over 11,000 transcripts was analyzed, and 214 transcripts showed significant differences between lean and obese mice. Surprisingly, the expression of genes normally associated with adipocyte differentiation were down-regulated in obesity. Not all obese individuals will become diabetic; many remain normoglycemic despite profound obesity. Understanding the transition to obesity with concomitant diabetes will provide important clues to the pathogenesis of type 2 diabetes. Therefore, we examined the levels of gene expression in adipose tissue from five groups of obese mice with varying degrees of hyperglycemia, and we identified 88 genes whose expression strongly correlated with diabetes severity. This group included many genes that are known to be involved in signal transduction and energy metabolism as well as genes not previously examined in the context of diabetes. Our data show that a decrease in expression of genes normally involved in adipogenesis is associated with obesity, and we further identify genes important for subsequent development of type 2 diabetes mellitus. Experiment Overall Design: For obesity study, lean samples include C57BL/6J lean, (C57BL/6J X BTBR) F1 and BTBR lean, obese sampples incluse C57BL/6J-ob/ob, (C57BL/6J X BTBR) F2-ob/ob and BTBR-ob/ob. All samples are subjected to Mu11K A and B arrays. Experiment Overall Design: For diabetes study, B6-ob/ob, (C57BL/6J X BTBR) F2-ob/ob low glucose, (C57BL/6J X BTBR) F2-ob/ob medium glucose, (C57BL/6J X BTBR) F2-ob/ob high glucose, and BTBR-ob/ob samples were analyzed for genes whose expression levels changes correlated with the plasma glucose levels in these mice. All samples are subjected to Mu11K A and B arrays.

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RNA seq analysis of calcium channel blocker, nifedipine in combination with metformin, MCC950 and anakinra treated Tet2-/- + Boy/J (1:1 ratio, mixed BM cells) transplanted Ob/Ob recipient mice

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