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Vitamin D3 AND Sirt1

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https://www.readbyqxmd.com/read/27763638/1-25-dihydroxy-vitamin-d3-with-tumor-necrosis-factor-alpha-protects-against-rheumatoid-arthritis-by-promoting-p53-acetylation-mediated-apoptosis-via-sirt1-in-synoviocytes
#1
Xin Gu, Bingjie Gu, Xianhui Lv, Zhenzhen Yu, Rong Wang, Xiaoli Zhou, Wanxin Qiao, Zhiyuan Mao, Guoping Zuo, Qing Li, Dengshun Miao, Jianliang Jin
Impaired apoptosis of fibroblast-like synoviocytes (FLSs) causes synovial hyperplasia, facilitating destruction of cartilage and bone in rheumatoid arthritis (RA). Tumor necrosis factor (TNF)-α, a dominant inflammatory mediator in RA pathogenesis, promotes progression of RA symptoms. Prevalence of 1, 25-dihydroxy-vitamin D3 (hereafter termed VD) deficiency is 30-63% in patients with RA. Whether VD leads to apoptosis or enhances TNF-α-mediated apoptosis in FLSs to ameliorate RA is unclear. To determine this, 10-week-old CYP27B1-deficient (CYP27B1(-/-)) mice with collagen-induced arthritis (CIA) were intraperitoneally treated with 1 μg/kg VD every other day for 9 weeks...
October 20, 2016: Cell Death & Disease
https://www.readbyqxmd.com/read/27561793/1-25-oh-2-d3-improves-cardiac-dysfunction-hypertrophy-and-fibrosis-through-parp1-sirt1-mtor-related-mechanisms-in-type-1-diabetes
#2
Hua Qu, Ke Lin, Hang Wang, Huili Wei, Baolan Ji, Zengsong Yang, Chuan Peng, Xiaoqiu Xiao, Huacong Deng
SCOPE: Diabetic cardiomyopathy is one of the most important cardiac complications associated with diabetes. However, the mechanisms underlying diabetic cardiomyopathy remain unclear. The PARP1, SIRT1, and mTOR pathways have been implicated in cardiac diseases, and they are also associated with diabetes. 1,25(OH)2 D3 was recently recognized as a potential PARP1inhibitor in a macrophage cell line. The aim of our study was to investigate whether 1,25(OH)2 D3 can improve diabetic cardiomyopathy through a vitamin D receptor (VDR)-dependent mechanism associated with the PARP1/SIRT1/mTOR pathway...
August 26, 2016: Molecular Nutrition & Food Research
https://www.readbyqxmd.com/read/26827953/1-25-dihydroxyvitamin-d-and-klotho-a-tale-of-two-renal-hormones-coming-of-age
#3
Mark R Haussler, G Kerr Whitfield, Carol A Haussler, Marya S Sabir, Zainab Khan, Ruby Sandoval, Peter W Jurutka
1,25-Dihydroxyvitamin D3 (1,25D) is the renal metabolite of vitamin D that signals through binding to the nuclear vitamin D receptor (VDR). The ligand-receptor complex transcriptionally regulates genes encoding factors stimulating calcium and phosphate absorption plus bone remodeling, maintaining a skeleton with reduced risk of age-related osteoporotic fractures. 1,25D/VDR signaling exerts feedback control of Ca/PO4 via regulation of FGF23, klotho, and CYP24A1 to prevent age-related, ectopic calcification, fibrosis, and associated pathologies...
2016: Vitamins and Hormones
https://www.readbyqxmd.com/read/25536521/resveratrol-potentiates-vitamin-d-and-nuclear-receptor-signaling
#4
Angelika Dampf Stone, Shane F Batie, Marya S Sabir, Elizabeth T Jacobs, Jamie H Lee, G Kerr Whitfield, Mark R Haussler, Peter W Jurutka
The 1,25-dihydroxyvitamin D3 (1,25D) hormone is derived from vitamin D generated in skin or obtained from the diet, and binds to and activates the vitamin D receptor (VDR) in target tissues including kidney, colon/small intestine, and bone/muscle. We tested resveratrol for its ability to modulate VDR signaling, using vitamin D responsive element (VDRE) and mammalian 2-hybrid (M2H) transcriptional system technology. Via VDRE-based assays in kidney, colon and myoblast cells, VDR-mediated transcription was activated by resveratrol, and a cooperative effect on transactivation was observed with resveratrol plus 1,25D...
June 2015: Journal of Cellular Biochemistry
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