Experimental study of lanthanum nitrate on rat pancreas in type 2 diabetes INSR,IRS1 and apoptosis of cells
10.3969/j.issn.1000-484X.2014.07.006
- VernacularTitle:硝酸镧对2型糖尿病大鼠胰腺 INSR、IRS1和细胞凋亡影响的实验研究
- Author:
Dongmei LI
;
Kexin HUANG
;
Hongxi MA
- Publication Type:Journal Article
- Keywords:
Lanthanum Nitrate;
Type 2 diabetes;
Pancreas tissue;
Insulin receptor;
Insulin receptor substrate 1;
Apoptosis
- From:
Chinese Journal of Immunology
2014;(7):888-892
- CountryChina
- Language:Chinese
-
Abstract:
Objective:To explore the effects of lanthanum nitrate low-dose on 2 type diabetic rat pancreas INSR ,IRS1 and apoptosis of cells.Methods:The 50 male Wistar rats were randomly divided into normal control group (10) and model group(40),and were given normal diet and high-fat high-sugar diet.After 8 weeks,making the module intraperitoneal injection of streptozotocin (STZ,30 mg/kg) rats to induce type 2 diabetes model ,after a successful modeling experimental animals were divided into three groups namely the control group,diabetic model group and La(NO3)3 treatment group,three groups of rats were given daily saline,saline,lanthanum (0.2 mg/kg) nitrate administered a month ,then were sacrificed blood and pancreas.By radioimmunoassay to detect glucose ,insulin levels(in rat serum);by ELISA to detect the protein content of INSR and IRS 1(in rat serum);by immunohistochemistry to detect the protein expression levels of INSR and IRS1(in rat pancreas tissue);TUNEL apoptosis detection kit was used to detect pancreatic tissue percentage of apoptosis;HE staining was used to detect pathological changes of the pancreas.Results: Compared with the normal control group,diabetic model rats blood glucose and pancreatic tissue apoptosis rate were significantly increased ,blood insulin,INSR and IRS1 protein content and pancreatic tissue the protein expression levels of INSR and IRS 1 were significantly reduced ,difference was statistically significant ( P<0.01 );La( NO3 ) 3 treatment group blood glucose and pancreatic tissue apoptosis rate were slightly elevated ,blood insulin , INSR and IRS1 protein content and pancreatic tissue the protein expression levels of INSR and IRS 1 were slightly reduced significantly(P<0.05);Light microscopy showed pancreatic tissue in the control group closely arranged ,plump,large volume islet pancreatic tissue of diabetic rats in groups evacuate more smaller islet volume ,pancreatic tissue lanthanum nitrate basic set tight,plump,slightly islet volume small.Conclusion:Oral lanthanum nitrate can be lowered blood sugar levels and inhibiting apoptosis of pancreatic tissue ,increased insulin levels and the protein expression levels of INSR and IRS 1 in pancreatic tissue ,have a protective effect on diabetic rat pancreas .
