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Insulin Receptor Substrate-2 Regulates the Secretion of Growth Factors in Response to Amino Acid Deprivation.
Int J Mol Sci
January 2025
Department of Animal Resource Sciences, Graduate School of Agricultural and Life Sciences, The University of Tokyo, Tokyo 113-8657, Japan.
Insulin receptor substrates (IRSs) are well-known mediators of the insulin and insulin-like growth factor (IGF)-I signaling pathways. We previously reported that the protein levels of IRS-2, a molecular species of IRS, were upregulated in the livers of rats fed a protein-restricted diet. This study aimed to elucidate the physiological role of IRS-2, whose level increases in response to protein restriction in cultured hepatocyte models.
View Article and Find Full Text PDFXylooligosaccharide and Akkermansia muciniphila synergistically ameliorate insulin resistance by reshaping gut microbiota, improving intestinal barrier and regulating NKG2D/NKG2DL signaling in gestational diabetes mellitus mice.
Food Res Int
February 2025
Department of Nutrition and Food Hygiene, NMPA Key Laboratory for Safety Evaluation of Cosmetics, Guangdong Provincial Key Laboratory of Tropical Disease Research, School of Public Health, Southern Medical University, 1026. Shatai South Road, Guangzhou 510515, Guangdong, PR China; Department of Clinical Nutrition, Nanfang Hospital, Southern Medical University, 1838. Guangzhou Avenue North, Guangzhou 510515, Guangdong, PR China. Electronic address:
Xylooligosaccharides (XOS) ameliorate insulin resistance (IR) in gestational diabetes mellitus (GDM) probably by propagating Akkermansia muciniphila (Akk). This study aimed to investigate the effects and mechanisms of XOS, Akk and combination on IR in GDM mice/pseudo-germ-free (PGF) mice. Female mice were fed with AIN-93 (n = 19) and high fat diet (HFD) (n = 206).
View Article and Find Full Text PDFThe alleviation by wheat and oat dietary fiber alone or combined of T2DM symptoms in / mice.
Food Funct
January 2025
Academy of National Food and Strategic Reserves Administration, Beijing, China.
The effects of wheat and oat dietary fiber (DF) alone or combined on T2DM remain unclear. In this research, / diabetic mice were fed with diets containing 10% insoluble wheat dietary fiber (WDF), 10% insoluble oat dietary fiber (ODF), and 10% WODF (mixture of WDF and ODF, WDF : ODF = 1 : 1) for 8 weeks. The results showed that WDF, ODF, and WODF all reduced the body weight and fasting blood glucose (FBG) and improved oral glucose tolerance in / mice.
View Article and Find Full Text PDFPalmitate potentiates the SMAD3-PAI-1 pathway by reducing nuclear GDF15 levels.
Cell Mol Life Sci
January 2025
Department of Pharmacology, Toxicology and Therapeutic Chemistry, Faculty of Pharmacy and Food Sciences, Unitat de Farmacologia, Universitat de Barcelona, Av. Joan XXIII 27-31, 08028, Barcelona, Spain.
Nuclear growth differentiation factor 15 (GDF15) reduces the binding of the mothers' against decapentaplegic homolog (SMAD) complex to its DNA-binding elements. However, the stimuli that control this process are unknown. Here, we examined whether saturated fatty acids (FA), particularly palmitate, regulate nuclear GDF15 levels and the activation of the SMAD3 pathway in human skeletal myotubes and mouse skeletal muscle, where most insulin-stimulated glucose use occurs in the whole organism.
View Article and Find Full Text PDFPolysaccharides from Cynanchum auriculatum Royle ex Wight ameliorate symptoms of hyperglycemia by regulating gut microbiota in type 2 diabetes mellitus mice.
Int J Biol Macromol
January 2025
College of Marine and Bioengineering, Yancheng Institute of Technology, Yancheng 224051, China. Electronic address:
Type 2 diabetes mellitus (T2DM) represents a chronic metabolic disorder characterized by disrupted carbohydrate and lipid balance, resulting in hyperglycemia. This study evaluated the impact of polysaccharides derived from Cynanchum auriculatum Royle ex Wight (CRP) on mitigating hyperglycemia and modulating intestinal microbiota in T2DM mice. Findings indicated that CRP is mainly linked by →6)α-D-Glcp-(1→ and CRP-H demonstrated greater efficacy than CRP-L in regulating hypoglycemic-related indicators such as serum high-density lipoprotein cholesterol (HDL-c) level.
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