The relationship between blood pressure and various risk factors were investigated in 54 cases of non-insulin-dependent diabetes mellitus (NIDDM) with stepwise regression analysis. After evaluating the influence of age, course, body mass index (BMI), fasting and postprandial blood glucose, serum IRI, C-peptide, HbA1c, plasma lipids (Ch, TG, HDL-C. LDL-C). ApoA1, ApoB2, 24h urine Alb/Cr, NAG/Cr. TRF Cr and RBP/Cr levels on blood pressure, the following results were found: 1) NIDDM patients had a two-fold increased risk of hypertension than normal population. 2) Among the 21 risk factors analysed, 6 variables were strongly correlated with blood pressure, i. e. , age, postprandial blood glucose, serum IRI, blood total cholesterol, 24h urine Alb/Cr and TRF/Cr level. 3) Postprandial hyperglycemia was the most important variable positively correlated with hypertension, followed by 24h urine Alb/Cr and plasma total cholesterol.

Objective To investigate the relationship between serum nitric oxide (NO) and bone metabolism in streptozotocin induced early diabetic (STZ DM) rats. Methods Twenty SD rats were divided into 2 groups, 12 STZ DM rats and 8 controls. Fasting blood glucose, HbA 1c , serum insulin, bone mineral density (BMD) (whole body, lumbar and femoral bone), bone metabolic parameters 〔such as serum calcium, vitamin D 3, parathyroid hormone (PTH), calcitonin, osteocalcin, and urinary pyridinoline/creatinine〕, as well as serum NO were measured. Results Compared with the controls, serum NO in STZ DM group significantly elevated 〔(51.3?11.9 vs 38.1?12.0)?mol/L, P

To investigate the effect of pancreatic elastase on diabetic nephropathy,104 cases of type Ⅱ diabetic patients were selected as control group and group treated with elastase separately for a course of 6 months.The results showed that pancreatic elastase reduced microproteinuria significantly,especially mi- croalbuminuria and microtransfer rrinuria which reflect the glomerular filtration rate.It was concluded that elastase could improve early diabetic nephropathy and might have some protective effect as well.At the same time,elastase had some good effect on lipid and lipoprotein metabolism.

Objective: To develop a method for the determination of lacidipine (LAC) in human plasma.Methods: After liquid-liquid extraction with tert-butyl methyl ether, the plasma samples were analyzed by LC-MS/MS.Using lacidipine-13C8 as the internal standard, a Agilent ZORBAX Eclipse XDB C18 column (150 mm×2.1 mm, 5 μm) was used with the mobile phase consisting of water(containing 5 mmol·L-1 ammonium formate)-acetonitrile(15∶85,v/v)at a flow rate of 0.3 ml·min-1 and with the column temperature at 40 ℃.The ion transitions were performed in a positive electrospray ionization multiple reaction-monitoring mode regarding + as the molecular ion peak of lacidipine and monitoring with m/z 473.5→m/z 410.3, m/z 473.5→m/z 400.1 and m/z 473.5→m/z 354.3.The internal standard was monitored with m/z 481.4→m/z 362.3.Results: The linear range of lacidipine was 0.1-10 ng·ml-1 (r＞0.99) and the lower quantification limit was 0.1 ng·ml-1.The intra-and inter-day RSDs were 3.15%-7.04% and the relative error was from-8.58% to 12.71%.The mean relative recovery of lacidipine was from 107% to 118% (RSD＜15%).The plasma samples were stable at-20℃ for 40 d and kept stable after three repeated freeze-thaw cycles.The prepared samples were stable at room temperature for 24 h and in the automatic sample injector (4℃) for 24 h(RSD＜15%).Conclusion: The developed assay method can be applied in the bioequivalence evaluation and pharmacokinetic studies of lacidipine in human.

Objective To investigate the effects of endogenous sulfur dioxide (SO2) on the oxidative stress induced by cobalt chloride (CoCl2) in the rat pulmonary artery smooth muscle cells (PASMCs).Methods Rat PASMCs were treated with 200 μ mol/L CoCl2 to mimic the hypoxia insult.Endogenous SO2 generating enzyme aspartate aminotransferase 1 (AAT1) expression was upregulated or downregulated (AAT1 sh) by transfection with lentivirus.Rat PASMCs were randomly divided into 8 groups:vehicle group,vehicle + CoCl2 group,AAT1 group,AAT1 + CoCl2 group,scramble group,scramble + SO2 group,AAT1 sh group and AAT1 sh + SO2 group.SO2 donor Na2 SO3/NaHSO3 at concentration of 100 μ mol/L were added in scramble + SO2 group and AAT1sh + SO2 group.The expressions of AAT1,superoxide dismutase 1 (SOD1) and SOD2 in PASMCs were detected by Western blot method.In situ SO2 content in PASMCs was detected by fluorescent probe.The superoxide anions in PASMCs were labeled by dihydroethidium (DHE) probe under fluorescent microscope.Results Compared with the vehicle group,the levels of SO2 and the expressions of AAT1 (0.221 ± 0.002 vs.0.446 ± 0.004),SOD1 (0.076 ± 0.028 vs.0.171 ± 0.019) and SOD2 (0.080 ± 0.031 vs.0.196 ± 0.018) significantly decreased (all P ＜ 0.01),and superoxide anion increased in rat PASMCs of vehicle + CoCl2 group.Meanwhile,compared with vehicle + CoCl2 group,the levels of SO2 and the expressions of AAT1 (0.839 ± 0.056 vs.0.221 ± 0.002),SOD1 (0.177 ± 0.020 vs.0.076 ± 0.028) and SOD2 (0.195 ±0.018 vs.0.080-± 0.031) markedly increased (all P ＜ 0.01),and superoxide anion decreased in rat PASMCs of AAT1 + CoCl2 group.On the contrary,compared with the scramble group,the levels of SO2 and the expressions of AAT1 (0.062 ±0.017 vs.0.354 ±0.034),SOD1 (0.054 ±0.029 vs.0.157 ±0.023) and SOD2(0.180 ±0.100 vs.0.586 ± 0.176)significantly decreased (all P ＜ 0.01),and superoxide anion increased in rat PASMCs of AAT1sh group.Furthermore,compared with the AAT1 sh group,the levels of SO2 and the expressions of SOD1 (0.155 ± 0.022vs.0.054 ± 0.029) and SOD2 (0.578 ± 0.200 vs.0.180 ± 0.100) significantly increased (all P ＜ 0.01),and superoxide anion decreased in rats PASMCs of AAT1sh + SO2 group.Conclusion Endogenous SO2/AAT1 inhibits CoCl2-induced oxidative stress in rat PASMCs.

Objective To evaluate the efficacy and safety of new epalrestat on diabetic peripheral neuropathy (DPN) compared with Tang Lin.Methods A total of 235 patients with DPN were enrolled in our study.They were randomly divided into two groups:the new epalrestat group (n=117) and the Tang Lin group (n=118).Their clinical,biochemistry,electrocardiogram,clinical symptoms and physical examinations,by using Michigan Neuropathy Screening Instrument (MNSI),and electrophysiological assessments were performed.Results The mean changes of MNSI scores both decreased compared with baseline in two groups after treatment for 12 weeks (P＜0.05) and nerve conduction velocity improved in the two groups (P＜0.05),but there were no difference of MNSI scores and nerve conduction velocity between the two groups.There was no difference of adverse event,blood pressure,heart rate,blood and urine routine examinations,liver and renal function between the two groups.Conclusion The new epalrestat is effective and safe as Tang Lin in treatment of DPN.

Objective To investigate the apolipoprotein (a) [apo(a)] polymorphism in the patients with type 2 diabetes mellitus and its relationship with complications.Methods In this study, we tested apo(a) phenotype via modified Utermann and Guo method in the 40 non-diabetic controls and 176 subjects with type 2 diabetes and analyzed the relationship between apo(a) phenotypes and micro- and macrovascular complications, including nephropathy, neuropathy, retinopathy, hypertension, coronary heart disease and cerebral infarction.Results Among the 40 non-diabetic controls, the frequencies of S3S2, S4 and S4S2 were 20%, 70% and 10% respectively and the serum lipoprotein(a) [Lp(a)] level was 0.08±0.07 mg/L. While the frequencies of S2, S3, S3S2, S4, S4S2, S4S3 were 18.18%, 20.45%, 17.05%, 34.09%, 4.55% and 5.68% in the diabetics and the Lp(a) concentration was 0.13±0.11 mg/L, with significant difference between the diabetics and non-diabetic controls. In comparison with the diabetics without complications, the frequency of apo(a) phenotype significantly differed in patients with nephropathy, nephropathy, hypertension, coronary heart disease and cerebral infarction except for diabetic retinopathy. In comparison with patients with S2 phenotype, the levels of fasting plasma glucose (FPG), 2-hour postprandial plasma glucose (2hPG) and glycated hemoglobin A1c (HbA1c) were lower in patients with S4 phenotype. The concentration of Lp(a) and urine albumin index (Alb/Cr) were significantly different among diabetics with different apo(a) phenotype, the highest being in patients with S2, secondly S3, and the lowest S4.Conclusion There were significant differences in the frequency of apo(a) phenotype between subjects with type 2 diabetes and non-diabetic controls, and also in diabetics with or without microvascular and macrovascular diseases. The underlying linkage might be microalbuminuria and insulin resistance.