Effective gene delivery of shBMP-9 using polyethyleneimine-based core–shell nanoparticles in an animal model of insulin resistance

Nanoscale ◽  
2019 ◽  
Vol 11 (4) ◽  
pp. 2008-2016 ◽  
Author(s):  
Yanjun Jia ◽  
Dechao Niu ◽  
Qiujin Li ◽  
Hong Huang ◽  
Xinrun Li ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Animal Model ◽  
Type 2 Diabetes Mellitus ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Morphogenetic Protein ◽  
Core Shell Nanoparticles

Bone morphogenetic protein (BMP)-9 has been associated with insulin resistance and type 2 diabetes mellitus.

scholarly journals Endocrine regulation of G-protein subunit production in an animal model of type 2 diabetes mellitus

2001 ◽  
Vol 168 (3) ◽  
pp. 509-515 ◽  
Author(s):  
BD Rodgers ◽  
M Bernier ◽  
MA Levine
Keyword(s):  
Diabetes Mellitus ◽  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Animal Model ◽  
Type 2 Diabetes Mellitus ◽  
Animal Models ◽  
G Protein ◽  
Dependent Manner ◽  
Protein Subunit

Adipocyte beta-adrenergic sensitivity is compromised in animal models of obesity and type 2 diabetes. Although changes in the membrane concentrations of G-protein alpha subunits (Galpha) have been implicated, it remains to be determined how these changes are affected by insulin resistance in the different animal models. Because previous studies used young animals, we measured the concentrations of Galpha and Gbeta subunits in epididymal fat from aged (48 weeks old) db/db mice and from their lean littermates to more closely reproduce the model of type 2 diabetes mellitus. Levels of immunoreactive Galphas, Galphai(1/2), Galphao and Galphaq/11 were all significantly greater in adipocyte membranes from the db/db mice than in membranes from their lean non-diabetic littermate controls. Levels of Galphai(1) and Galphai(2) were also individually determined and although they appeared to be slightly higher in db/db membranes, these differences were not significant. Although the levels of both Galphas isoforms were elevated, levels of the 42 and 46 kDa proteins rose by approximately 42% and 20% respectively, indicating differential protein processing of Galphas. By contrast, levels of Galphai3 were similar in the two groups. The levels of common Gbeta and Gbeta2 were also elevated in db/db mice, whereas Gbeta1 and Gbeta4 levels were not different. To determine whether these changes were due to insulin resistance per se or to elevated glucocorticoid production, G-protein subunit levels were quantified in whole cell lysates from 3T3-L1 adipocytes that were stimulated with different concentrations of either insulin or corticosterone. Although none of the subunit levels was affected by insulin, the levels of both Galphas isoforms were increased equally by corticosterone in a concentration-dependent manner. Since glucocorticoids are known regulators of Galphas gene expression in many cell types and in adipocytes from diabetic rodents, the results presented herein appear to more accurately reflect diabetic pathophysiology than do those of previous studies which report a decrease in Galphas levels. Taken together, these results indicate that most of the selective changes in G-protein subunit production in adipocytes from this animal model of type 2 diabetes may not be due to diminished insulin sensitivity, but may be due to other endocrine or metabolic abnormalities associated with the diabetic phenotype.

Trabecular bone score and insulin resistance in type 2 diabetes mellitus

2020 ◽  
Author(s):  
Ponce Maria Hayon ◽  
Laguna Mª del Carmen Serrano ◽  
Perez Maria Dolores Aviles ◽  
Beatriz Garcia Fontana ◽  
Sheila Gonzalez Salvatierra ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Trabecular Bone ◽  
Trabecular Bone Score

Echinops Spp. Polysaccharide B Ameliorates Metabolic Abnormalities in a Rat Model of Type 2 Diabetes Mellitus

2020 ◽  
Vol 19 (1) ◽  
pp. 106-114
Author(s):  
Guang Hao ◽  
Xiaoyu Ma ◽  
Mengru Jiang ◽  
Zhenzhen Gao ◽  
Ying Yang
Keyword(s):  
Diabetes Mellitus ◽  
Insulin Resistance ◽  
Type 2 Diabetes ◽  
Type 2 Diabetes Mellitus ◽  
Insulin Secretion ◽  
Insulin Receptor ◽  
Skeletal Muscles ◽  
Insulin Receptor Substrate ◽  
Sprague Dawley

This study examined the in vivo effects of Echinops spp. polysaccharide B on type 2 diabetes mellitus in Sprague-Dawley rats. We constructed a type 2 diabetes mellitus Sprague-Dawley rat models by feeding a high-fat and high-sugar diet plus intraperitoneal injection of a small dose of streptozotocin. Using this diabetic rat model, different doses of Echinops polysaccharide B were administered orally for seven weeks. Groups receiving Xiaoke pill and metformin served as positive controls. The results showed that Echinops polysaccharide B treatment normalized the weight and blood sugar levels in the type 2 diabetes mellitus rats, increased muscle and liver glycogen content, improved glucose tolerance, increased insulin secretion, and reduced glucagon and insulin resistance indices. More importantly, Echinops polysaccharide B treatment upregulated the expression of insulin receptor in the liver, skeletal muscles, and pancreas, and significantly improved the expression levels of insulin receptor substrate-2 protein in the liver and pancreas, as well as it increased insulin receptor substrate-1 expression in skeletal muscles. These two proteins play crucial roles in increasing insulin secretion and in controlling type 2 diabetes mellitus. The findings of the present study suggest that Echinops polysaccharide B could improve the status of diabetes in type 2 diabetes mellitus rats, which may be achieved by improving insulin resistance. Our study provides a new insight into the development of a natural drug for the control of type 2 diabetes mellitus.

Sign in / Sign up

Export Citation Format

Share Document