Effect of early insulin therapy on nuclear factor-kB inflammatory pathway in liver of diabetic rat / 中华内科杂志

Objective To investigate the effect of early insulin therapy on NF-KB pathway and inflammatory cytokine responses in fiver of diabetic rat.Methods NF-KB p65 DNA binding was assayed with ELISA-based assay kit,cytokine gene expressions were quantified with real-time PCR and phosphoenolpyruvate carboxykinase(PEPCK),NF-KB and inhibitor KB(IKBα)protein levels wlere assayed with Westem blot.Results Compared with control,hepatic PEPCK protein level in the untreated diabetic rat increased by 40%.Early insulin and gliclazide treatment normalized PEPCK protein level.The abundance of IKBα protein was significantly decreased and nuclear NF-KB p65 DNA binding activity was incteased in untreated diabetic rats.IKBot protein content increased and NF-KB p65 DNA binding decreased during early intervention treatment.mRNAs encoding IL-1β and TNFα were increased,which were reduced to normal levels after insulin and gliclazide treatment.Conclusions It is suggested that early insulin treatment inhibits NF-KB activity and inflammatory cytokine responses in fiver that are involved in the aniefioration of insulin resistance in diabetic rats.Such results misht be due to indirect antiinflammatory effects of insulin thus relieving glucotoxicity and lipotoxicity in pefipherM tissues.

A survey of glucose and lipid metabolism and concomitant diseases among inpatients in Guangdong province / 中华内科杂志

Objectives To investigate the epidemiological and clinical characteristics of dyslipidemia as well as its treatment and influence on accompanying diseases in impaired glucose status among inpatients. Methods A cross-sectional survey was conducted among the inpatients registered in ten university hospitals of Guangdong, China during the week before the Diabetes Day in 2004. The fasting blood glucose (FBG), lipid profiles, BMI, waist to hip ratio (WHR) and concomitant disorders of the first screen during the hospitalization period were recorded. Those who had FBG level from 5.6 to 6. 9 mmol/L and not been previously diagnosed diabetes (PDM) underwent oral glucose tolerance test (OGTF). Results Of the 8753 inpatients investigated, 1067 eases had complete medical records(CMR case) including PDM cases and previously non-diagnosed diabetes ones with FBG ≥ 5. 6 mmol/L. Of the previously non-diagnosed diabetes cases with FBG levels from 5.6 to 6.9 mmmol/L, 65.8% accepted OGTT. Of the CMR cases, 41.9% had PDM, 21.7% was newly diagnosed diabetes mellitus (NDM), 29. 1% had impaired glucose regulation (IGR) and only 7.3% had normal glucose tolerance (NGT). The TG levels in NDM and PDM group were higher than those in IGR and NGT group (P < 0.05, respectively). The HDL-C levels in IGR, NDM and PDM group were lower than those in NGT group (P < 0.05, respectively). Sixty-nine point six percent of the diabetes mellitus (DM) inpatients was accompanied with dyslipidemia and the rate was higher than those in NGT (56.4%) and IGR inpatients (52.5%, P <0.05, respectively). Only 22. 8% of the PDM inpatients underwent treatment of dyslipidaemia and just 3.4% achieved the target suggested by the guideline of ATP-Ⅲ. BMI was higher and waistline longer in the PDM and NDM inpatients than those in the NGT cases (P <0.05, respectively). Seventy-two point eight percent of the PDM inpatients was complicated with more than one type of vascular diseases. Nine point seven percent and 0. 2% of the NDM inpatients were tormented by diabetic nephropathy and diabetic retinopathy respectively. Conclusions More inpatients with accompany DM or IGR had concomitant dyslipidemia than those with NGT, which included hypertriglyccridemia, hypo-high-density lipoproteinemia and metabolic syndrome. Concomitant vascular diseases were more frequently found in PDM inpatients than in the others. Some of the NDM and IGT inpatients were complicated with microvascular diseases.

Insulin reverses fatty liver disease in diabetic mice induced with high fat diet / 中华内分泌代谢杂志

The effect of insulin treatment on fatty liver was investigated in diabetic mice fed with high-fat diet.C57 BL/6J mice were fed with high fat diet for 12 weeks,and then treated with Glargine for 4 weeks.The results showed that during intraperitoneal glucose tolerance test,blood glucose,serum total cholesterol and triglyceride(TG) were significantly lower in insulin-treated high fat group than those in untreated ones(P<0.05).The hepatic histology showed minimal or barely visible fat in hepmic cells along with TG content in liver decreasing by 20.71%. The results suggest that insulin ameliorates hepatic intracellular lipid accumulation induced by high fat diet.

Screening for Mutations of MODY 1-5 Genes in Chinese Families with Early-onset Type 2 Diabetes / 中山大学学报(医学科学版)

[Objective] The aim of our study was to seek the mutations in MODY1～5 genes in Chinese population by direct sequencing in probands from families with early-onset type 2 diabetes.[Methods] Variants screening in MODY 1-5 genes were performed by PCR and direct sequencing in 19 probands from early-onset type 2 diabetes families.[Results] We found no mutation but many polymorphisms.There were 6,5,15,1,and 1 variants in MODY 1-5 genes respectively.[Conclusion] Our negative results in MODY genes suggest the genetic heterogeneity of different populations.Mutations in MODY 1-5 genes might not be the cause of diabetes in those 19 families.

The estimation of the rationality of lower cut-point (5.6 mmol/L) of FPG for the diagnosis of impaired fasting glucose / 中国糖尿病杂志

Screening the 2512 employees aged 20~94 years in Fushan city by 75 g OGTT showed that 5.51 mmol/L of FPG was the optimal cut-point for diagnosis of diabetes with a sensitivity of 80% and a specificity of 80%; 5.15 mmol/L of FPG was the optimal cut-point for the diagnosis of IGT.It is reasonable to lower FPG cut-point for IFG.

The epidemiological study of metabolic syndrome in Fushan,Guangdong province / 中国糖尿病杂志

The standardized prevalences of CDS suggestiondiagnosed metabolic syndrome(MS) and its components were 11.46% in MS,5.17% in diabetes,16.35% in hypertension,25.59% in high triglyceride level,4.72% in low HDL-C level,18.84% in overweight or obesity in 2512 randomized official employees in Fushan city of Guangdong province in 2003.The MS prevalence was increased with ageing.