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A immunohistochemical study on extracellular matrix in experimental diabetic rat lung

Chinese Journal of Diabetes.2000;8(3):171-174.

ObjectiveTo evaluate the change of extracellular matrix (ECM) in diabetic rat lungs.MethodsUsing special staining,immunohistochemical method and imaging analysis,the changes of distribution,area,integral optial density and relative contents of lung ECM in diabetic rats were studied.ResultsThe distributions of elastic fibres,collagenic fibres and reticular fibres increased and roughened.The type Ⅳ collagen strong staining was localized in alveolar septum,the basement membranes of bronchiole and capillary,and distributed in cordal,plexiform.Laminin was strong stained and found in alveolar septum,epithelial cells of alveolar,and the basement membranes of bronchiole and pulmonary vessels in cordal and linear distribution.Image analysis showed the area,integral optical density and relative contents of elastic fibres,collagenic fibres,reticular fibres,type Ⅳ collagen and laminin were larger in diabetic rat lungs than in control groups.ConclusionThese results showed that the changes of ECM in early diabetic rat lungs were abnormal.

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A study for RAGE Gly82Ser polymorphism in Chinese type 2 diabetic microangiopathy

Limei LIU ; Kunsan XIANG

Chinese Journal of Diabetes.2000;8(3):135-138.

ObjectiveTo investigate the association between a new identified Gly82Ser polymorphism of RAGE gene and diabetic microangiopathy,a case control study of 260 Chinese subjects (including 156 type 2 diabetics with or without nephropathy or retinopathy and 104 non diabetic control) was performed.MethodsGenotype frequencies of Gly82Ser polymorphism were studied by PCR RFLP analysis with AluI digestion.ResultsThe most frequent genotype and allele of Gly82Ser polymorphism of RAGE gene in Chinese were genotype GG and allele G.Their frequency distribution showed significant difference between Chinese and Caucasian.There was no difference in genotype frequencies or allele frequencies between type 2 diabetic patients (DN 0) and the control subjects.Genotype and allele frequencies did not differ in type 2 diabetic subjects with nephropathy or without nephropathy.Moreover,there were no associations between diabetic patients with or without retinopathy in genotype and allele frequencies as well (two tailed Fisher’s exactP >0.05).ConclusionOur results showed that Gly82Ser polymorphism in RAGE gene was not associated with diabetic microangiopathy,which suggests that these genetic variants may not be involved in the mechanism of diabetic microangiopathy in Chinese type 2 diabetics.

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The effect of dehydroepiandrostrone to retinal capillary pericytes under high glucose

Lixia CHENG ; Yanhu DONG ; Jiafu WANG

Chinese Journal of Diabetes.2000;8(5):295-297.

ObjectiveTo observe the effect of dehydroepiandrostrone (DHEA) on retinal capillary pericytes’ proliferation under high glucose and research the prevention and treatment of diabetic retinopathy (DR).MethodsRetinas were dissected from eyes of fresh killed cattle and retinal capillary pericytes were separated and cultured.The effect of DHEA (10、50、100、500、1 000nmol/L) on pericytes’ proliferetion was evaluated by 3H-thymidine incorporation and li-quid scintillation techniques.ResultsThere was significant difference between DHEA (50、100、500、1 000nmol/L) and control culturing for 48h.The increasing rate was 42.67% in DHEA of 500nmol/L.ConclusionDHEA could promote pericytes’ proliferation under high glucose.This provided reliable evidence for selecting effective drugs for prevention and treatment of DR clinically.

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Determination of urinary laminin in diabetes mellitus

Gong JIN ; Liu DING ; Chen WEI

Chinese Journal of Diabetes.2000;8(5):292-294.

Objective To study the relationship between urinary laminin(LN) and diabetic nephropathy.Methods Using the method for concentrating urinary laminin based on precipitation with PEG-4 000 and γ-globulin.The concentration of LN in the urine of 83 diabetics was measured by RIA.The concentration of micro-albumin and Ccr in the urine and the levels of plasma glucose and HbA1c were also measured.Results The choice of 150g/L of PEG-4 000 and 0.5 g/L of γ-globulin was the best method for concentrating urinary LN.The urinary LN in all groups was significantly higher than that in control group.Conclusion Urinary LN is an indicator in the diagnosis of the early diabetic nephropathy.

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Effects of puerar in injection on diabetic peripheral neuropathy

Jiayi LIN ; Lun DAI ; Jiegui XU

Chinese Journal of Diabetes.2000;8(5):269-271.

ObjectiveTo investigate the effects of puerar in injection on the diabetic preipheral neuropathy (DPN).MethodsComparing sixty-six cases in puerar treat group with twenty-two cases in mecobalamin control group.And observing the effects of puerar in injection on the electromyo graphy,FBG,HbAlc,hemorheology and erythrocyte polyol.ResultsMarked effective rate:51.51% (treat group);22.72% (control group) (P<001).Effective rate:89.39% (treat group );58.10% (control group) (P<005).In treat group after treatment,FBG fell slightly without any meaning in statistics (P>005);HbA1c decreased markedly (P<001);hemorheology improved evidently;erythrocyte polyol decreased conspicuously (P<001).ConclusionPuerar in injection has a good effect in DPN remedy.

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Study of correlation of serum adiponectin with type 2 diabetes and its macrovascular complications

Yun HONG ; Li SHAN

Chinese Journal of Diabetes.2010;18(3):207-208. doi:10.3969/j.issn.1006-6187.2010.03.014

Objective To explore the correlation of adipnectin with T2DM and its macrovascular complications. Methods The levels of serum adiponectin, plasma glucose, serum lipids, and fasting insulin were measured in normal subjects, type 2 diabetic patients and type 2 diabetic patients with macrovascular complications. Results (1) The serum adiponectin level was significantly lower in type 2 diabetic patients than in normal subjects, and was the lowest in type 2 diabetic patients with macrovascular complications. (2) Serum adiponetin level was negatively correlated with BMI,HOMA-IR, HbA_1c,TG and fasting insulin level. Conclusions The results suggest that lower serum adiponectin level may be related to macrovascular complications in type 2 diabetic patients.

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The clinical meaning of 1h-plasma glucose cutoff value during OGTT in the screening of diabetes and IGR

Le LIU ; Ping FENG

Chinese Journal of Diabetes.2010;18(3):204-206. doi:10.3969/j.issn.1006-6187.2010.03.013

Objective To determine 1 hour plasma glucose cutoff value during OGTT to screen diabetes and IGR and its relationship with islet β cell function and insulin sensitivity. Methods 4731 subjects were recruited to perform an OGTT.The cutoff value of 1h-plasma glucose during OGTT was analyzed by receiver operating characteristic curve (ROC curve).And according to the two cutoff values,we classified all the subjects to three groups,and compared HOMA-IR,HOMA-β,insulinogenic index and shape index among groups,then analyzed its correlation with each parameter. Results According to ROC results, to diagnose type 2 diabetes mellitus,the optimal cutoff value of 1h plasma glucose during OGTT was 12.935mmol/L,with sensitivity of 81.52%,specificity of 86.94%. To diagnose impaired glucose regulation(IGR),the optimal cutoff value of 1h plasma glucose was 9.815mmol/L,with sensitivity of 74.96% and specificity of 77.86%. We classified all the subjects to three groups, and among the three groups the insulinogenic index, shape index, HOMA-IR, HOMA-β showed statistically significant difference (all P＜0.01). There was a negative correlation of OGTT-1hPG with insulinogenic index and HOMA-β(all P＜0.01) and a positive correlation of OGTT-1h PG with shape index and HOMA-IR (all P＜0.01). Conclusions To diagnose type 2 diabetes mellitus,the optimal cutoff value of 1h plasma glucose during OGTT is 12.935mmol/L.To diagnose impaired glucose regulation(IGR),the optimal cutoff value of 1h plasma glucose is 9.815mmol/L.And 1h PG can reflect the islet β-cell function and insulin resistance.

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The effect of rosiglitazone combined with insulin on plasma aldosterone in diabetes patients

Wei WANG ; Xiaohui GUO ; Peihong JIA

Chinese Journal of Diabetes.2010;18(3):201-203. doi:10.3969/j.issn.1006-6187.2010.03.012

Objective To investigate if edema caused by rosiglitazone is associated with the change of aldosterone level. Methods Plasma aldosterone levels in different periods from patients treated with rosiglitazone combined with insulin were measured.Type 2 diabetes patients who have been treated with insulin alone were divided into two groups: patients treated with rosiglitazone(4mg/d) combined with insulin(RSG+insulin group), or treated with insulin alone (insulin group)(n=10). Aldosterone levels, incidence of edema and weight gain were monitored every two months during six months. Results The incidence of edema and weight gain were higher in RSG+insulin group than in insulin group. After two months, aldosterone levels were higher in RSG+insulin group than in insulin group[(77.8±25.9)vs(60.2±27.6)pg/ml,P＞0.05],but it had no statistical difference; after four months, aldosterone levels were higher in RSG+insulin group than in insulin group[(87.2±27.1)vs (61.5±25.6) pg/ml,P＜0.05]. After six months, aldosterone level recovered gradually,it had no statistical difference compared with that of control[(77.0±21.0)vs(69.6±21.7) pg/ml,P＞0.05]. Conclusions The cause of early edema in type 2 diabetic patients treated with rosiglitazone combined with insulin was probably assosiated with elevated aldosterone level.

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The diagnostic efficiency of 1,5-anhydroglucitol for diabetes mellitus

Jiajian CHEN ; Yuhui YE ; Zhuolian WEN

Chinese Journal of Diabetes.2010;18(3):198-200. doi:10.3969/j.issn.1006-6187.2010.03.011

Objective To explore the value of serum 1,5-AG in the diagnosis of diabetes mellitus by applying the method of pyranose oxidase (PROD). Methods 1,5-AG,FPG、2hPG and HbA_1c were determined in 50 case of DM,100 case of IGT and 30 control subject. ROC curve was applied to evaluate the diagnostic efficiency of 1,5-AG,FPG and HbA_1c for DM. Results Serum 1,5-AG was obviously lower in the diabetes than in IGT and controls(P＜0.01). Compared with controls, IGT patients had lower serum 1,5-AG(P＜0.05).1,5-AG level had significantly negative correlation with FPG,2hPG and HbA_1c respectively. The area under the ROC curve of 1,5-AG,FPG and HbA_1c are 0.948、0.921、0.817,respectively. Conclusions 1,5-AG level shows significantly correlation with glucose tolerance. Serum 1,5-AG measurement could be used as useful indicator in the screening of diabetes mellitus as well as in the monitoring of glycemic control.

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Effects of Dipeptidyl Peptidase-4 inhibitor on albuminuria in patients with type 2 diabetes mellitus

Qin HUANG

Chinese Journal of Diabetes.2017;25(5):468-471. doi:10.3969/j.issn.1006-6187.2017.05.018

Dipeptidyl Peptidase-4 inhibitor (DPP-4 inhibitor),a new kind of oral anti-diabetic medicine,has been widely used for the treatment of type 2 diabetes (T2DM) during the last decades.Recent evidence showed that DPP-4 inhibitor may have renal protective effects beyond glycemic control.Some clinical studies revealed that the reduction of HbA1c by DPP-4 inhibitor was paralleled by an improvement of albuminuria and renal function.Experimental studies indicated that the renal protection mechanism of DPP-4 inhibitor may be involved in its multiple effects including anti-inflammatory,anti-oxidation and improvement of endothelial function.However,the evidence of decreasing albuminuria for DPP-4 inhibitor mainly comes from animal models and some clinical trials with small sample size.More large randomized controlled trials (RCT) will be needed to certify the renal protection effect of DPP-4 inhibitor.In this review,the role of DPP-4 inhibitor on albuminuria will be considered and discussed from both experimental and clinical perspectives.

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