|Effects of timely insulin treatment on protection of beta cells in a rat model of type 2 diabetes mellitus|
|Zhou, YS; Gao, Y; Guo, XH; Li, B; Shu, W; Chi, JM|
|关键词||insulin type 2 diabetes rat model beta cells|
|刊名||CHINESE MEDICAL JOURNAL|
|WOS标题词||Science & Technology|
|类目[WOS]||Medicine, General & Internal|
|研究领域[WOS]||General & Internal Medicine|
|关键词[WOS]||ANIMAL-MODEL ; GROWTH ; GLUCOSE ; NIDDM ; ISLET ; DIFFERENTIATION ; HYPERGLYCEMIA|
Background Insulin treatment plays a key role in management of diabetes mellitus. Clinical researches showed that extra improvements in restoration of insulin secretion of pancreatic beta cells were found in patients with newly diagnosed type 2 diabetes. The purpose of this study was to investigate the effects of early insulin treatment on insulin mRNA expression and morphological alterations of cells in a Sprague Dawley (SD) rat model of type 2 diabetes.
Methods A rat model of type 2 diabetes mellitus ( T2DM) was induced by a high fat diet (high energy, HE) and low doses of streptozotoxin ( STZ, 40 mg/kg). A group of diabetic rats was then injected with protamine zinc insulin (PZI, 1 -2 U . kg(-1) . d(-1)) for one week. Insulin mRNA expression, morphological features of pancreatic islets, and metabolic parameters were examined in rats using reverse transcriptase-polymerase chain reaction ( RT-PCR immunohistochemistry, and other techniques.
Results In insulin-treated diabetic rats, insulin mRNA levels prominently increased by 81.3% ( P < 0.05), as compared with untreated diabetic rats. Moreover, timely insulin treatment noticeably improved the insulin content of beta cells, with an increase of 10.2% ( P < 0.05 despite a slight reduction in fasting blood glucose ( FBG), triglyceride (TG), and free fatty acid (FFA) levels, as compared to an untreated diabetic group.
Conclusion Insulin treatment at the onset of T2DM effectively improves insulin synthesis, as confirmed by morphological changes to beta cells in a rat model of type 2 diabetes.
|作者单位||1.Beijing Hosp, Dept Plast Surg, Beijing 100730, Peoples R China|
2.Beijing Inst Geriatr, Dept Biochem, Beijing 100730, Peoples R China
3.Beijing Hosp, Dept Endocrinol, Beijing 100730, Peoples R China
4.Peking Univ, Hosp 1, Dept Endocrinol, Beijing 100034, Peoples R China
|Zhou, YS,Gao, Y,Guo, XH,et al. Effects of timely insulin treatment on protection of beta cells in a rat model of type 2 diabetes mellitus[J]. CHINESE MEDICAL JOURNAL,2004,117(10):1523-1529.|
|APA||Zhou, YS,Gao, Y,Guo, XH,Li, B,Shu, W,&Chi, JM.(2004).Effects of timely insulin treatment on protection of beta cells in a rat model of type 2 diabetes mellitus.CHINESE MEDICAL JOURNAL,117(10),1523-1529.|
|MLA||Zhou, YS,et al."Effects of timely insulin treatment on protection of beta cells in a rat model of type 2 diabetes mellitus".CHINESE MEDICAL JOURNAL 117.10(2004):1523-1529.|