Overproduction of nitrate and S-nitrosothiols in diabetic patients

Objective The present study was designed to investigate changes in serum or plasma concentrations of nitric oxide and its derivatives in diabetic patients.Methods Serum nitrate concentration of 84 diabetic patients was measured by using an enzyme kinetic method,and the plasma S-nitrosothiols concentration of 10 cases was measured by using HPLC technique.Results Serum nitrate concentration and plasma S-nitrosothiols concentration in the diabetics were significantly higher than in control group (P＜0.01 andP＜0.05,respectively).The serum nitrate concentration in diabetics also had a significant positive correlation with the serum glucose concentration (R=0.7256,P＜0.05),but this correlation was not found in control group.Conclusion These data showed that NO and its derivatives are overproduced in the diabetic patients.(J Geriatr Cardiol 2008;5:25-27)     

血浆同型半胱氨酸与2型糖尿病外周神经病变的相关性

目的 探讨血浆总同型半胱氨酸浓度与糖尿病外周神经病变的关系.方法 入选2型糖尿病患者227例,进行横断面研究.用临床表现及肌电图诊断外周糖尿病神经病变,并测定血浆同型半胱氨酸水平及与糖尿病神经病变相关或可能影响血浆同型半胱氨酸水平的指标.结果 糖尿病外周神经病变患者80例,糖尿病无神经病变者147例.糖尿病神经病变组血浆总同型半胱氨酸水平(12.6±3.6)μmol/L,高于糖尿病非神经病变组(8.2±0.9)μmol/L(P＜0.01).在校正外周神经病变传统危险因素(糖尿病病程、糖化血红蛋白)及高同型半胱氨酸浓度的影响因素(年龄、性别、血清叶酸和维生素B12、肾功能状态和双胍类使用)后,同型半胱氨酸与糖尿病神经病变仍相关[OR1.15(1.02～1.28),P＜0.05].在校正每单位上述混杂因素增加后,每增加4.0 μmol/L的血浆同型半胱氨酸也与神经病变发生密切相关[OR 1.17(0.94～1.33),P＜0.05].结论 高血浆总同型半胱氨酸浓度与糖尿病神经病变的发生相关,为糖尿病外周神经病变的独立危险因素.

Abstract：

Objective To explore the relationship between plasma homocysteine levels and diabetic peripheral neuropathy (DPNP). Methods A crossectional analysis was conducted on 227 patients with type 2 diabetes. Peripheral neuropathy was confirmed using electromyography (EMG). The risk factors possibly associated with diabetic neuropathy or plasma homocysteine levels were analyzed in relation to likelihood of occurrence of DPNP. Results Eighty patients with neuropathy and 147 patients without neuropathy were included. Plasma homocysteine levels were significantly higher in patients with diabetic neuropathy [( 12. 6 ± 3.6 ) μmol/ L] than without diabetic neuropathy [( 8. 2 ± 0. 9 ) μmol/L] ( P ＜0. 001 ), and the relationship remained significant after adjusting for duration of diabetes, glycosylated hemoglobin A1c (HbA1c), age, renal status, serum folate acid and vitamin B12, and metformin [OR 1.15( 1.02-1.28 ) ,P ＜ 0. 05]. In addition, per increase of 4. 0 μmol/L plasma homocysteine was closely related to the occurrence of neuropathy after controlling for per unit increase of other confounding factors [OR 1.17(0. 94-1.33), P ＜ 0. 05]. Conclusions Hyperhomocysteinemia was an independent risk factor for the occourence of diabetic peripheral neuropathy.     

血管内皮生长因子基因3'-非翻译区936C/T多态性与2型糖尿病外周神经病变相关

目的 探讨血管内皮生长因子(VEGF)基因3'-非翻译区936C/T多态性与山东地区汉族人2型糖尿病合并周围神经病变(DPN)之间的关系.方法 194例糖尿病患者分为单纯糖尿病组(n=92)和糖尿病神经病变组(n=102),另120名健康个体设为健康对照组.采用PCR-限制性片段长度多态性(RFLP)方法确定全部个体的基因型;对不同基因型间及病例组间的临床与生化参数、血清VEGF浓度以及VEGF基因936C/T多态性进行了统计分析.结果 糖尿病神经病变组C等位基因及CC基因型频率显著高于对照组(x2为9.406和9.677,P＜0.05)和糖尿病组(x2为5.578和5.614,P＜0.05),而携带T等位基因的基因型(CT+TT)频率及T等位基因频率显著低于对照组(x2为9.406和9.677,P＜0.05)和糖尿病组(x2为5.578和5.614,P＜0.05).Logistic多元回归分析显示血清低密度脂蛋白胆固醇(LDL-C)、总胆固醇、HbA1c水平以及VEGF浓度与DPN发生呈正相关,而VEGF基因936C/T多态性与糖尿病周围神经病变发病危险呈负相关(β=-1.046,OR=0.457,P=0.006,95%CI:0.166～0.741).结论 中国山东地区汉族人群中存在VEGF基因936C/T多态性,C等位基因及CC基因型患者可能是糖尿病易于发生神经病变危险性的遗传标志,而T等位基因和携带T等位基因的基因型(936TF基因型和936CT基因型)可能是降低糖尿病发生神经病变风险的遗传标志.

Abstract：

Objective To elucidate the relationship between a 936C/T mutation at 3'-untranslated region of human vascular endothelial growth factor(VEGF) gene and diabetic peripheral neuropathy ( DPN ). Methods All subjects recruited in this study were assigned into DM (n = 92, diabetes without neuropathy, retinopathy or nephropathy), DPN (n = 102, diabetes with peripheral neuropathy only ), and healthy control (n = 120 ) groups,respectively. The gene polymorphism was determined by PCR-RFLP, as well as the other clinical parameters including serum VEGF by ELISA. Results The frequencies of both genotype CC and allele C were significantly higher in DPN group than those in either DM group(x2 = 5.578 and 5.614, P＜0. 05 ) or control group (x2 = 9. 406 and 9. 677, P＜0. 05 ). However, the frequencies of genotype(CT+TT) and allele T were significantly lower in DPN group than that in either DM group(x2 =5.578 and 5.614, P＜0. 05) and control group (x2=9.406 and 9.677, P＜0.05). The multivariate logistic regression analysis showed that the levels of HbA1c, total cholesterol, low-density lipoproteincholesterol( LDL-C ), and serum VEGF positively correlated with DPN, while the 936C/T polymorphism of VEGF gene negatively correlated with DPN(β= -1. 046, OR=0. 457, P=0. 006, 95% CI: 0. 166-0. 741 ). Conclusions Allele 936C of VEGF gene may serve as a genetic marker susceptible to DPN, while allele 936T may be a protective genetic marker of DPN.     

老年人血镁水平降低与血糖代谢异常的关系

Objective To explore the relationship between serum magnesium (Mg) levels and glucose metabolism disorders in the elderly.Methods The data of health examination of 126 elderly people were collected in our hospital.There were 50 patients with type 2 diabetes,35 patients with impaired glucose regulation (IGR) and 41 people with normal glucose.The clinical data of the three groups were compared and analyzed.Results (1)There were no significant differences in age,body mass index (BMI) and blood lipid level among the three groups.The mean serum Mg level was lower in normal glucose group [(0.84±0.1) mmol/L] than in diabetic group [(0.75±0.11) mmol/L,P＜0.01] and IGR group [(0.78±0.12) mmol/L,P＜0.05].(2)The prevalence of hypomagnesemia was higher in diabetic group and IGR group than in normal glucose group (24%,28.6% vs.7.3%,P＜ 0.01 ).(3)The correlation study showed that the serum magnesium level was negatively associated with fasting plasma glucose and HbA1c (r= - 0.343,- 0.271,P＜0.01 ),but not associated with age and BMI.Conclusions The low serum magnesium level is associated with glucose metabolism disorders in the elderly.     

老年人血镁水平降低与血糖代谢异常的关系

Objective To explore the relationship between serum magnesium (Mg) levels and glucose metabolism disorders in the elderly.Methods The data of health examination of 126 elderly people were collected in our hospital.There were 50 patients with type 2 diabetes,35 patients with impaired glucose regulation (IGR) and 41 people with normal glucose.The clinical data of the three groups were compared and analyzed.Results (1)There were no significant differences in age,body mass index (BMI) and blood lipid level among the three groups.The mean serum Mg level was lower in normal glucose group [(0.84±0.1) mmol/L] than in diabetic group [(0.75±0.11) mmol/L,P＜0.01] and IGR group [(0.78±0.12) mmol/L,P＜0.05].(2)The prevalence of hypomagnesemia was higher in diabetic group and IGR group than in normal glucose group (24%,28.6% vs.7.3%,P＜ 0.01 ).(3)The correlation study showed that the serum magnesium level was negatively associated with fasting plasma glucose and HbA1c (r= - 0.343,- 0.271,P＜0.01 ),but not associated with age and BMI.Conclusions The low serum magnesium level is associated with glucose metabolism disorders in the elderly.     

糖尿病患者血清可溶性血管内皮细胞钙黏蛋白水平与动脉粥样硬化关系的临床研究

研究糖尿病患者血清血管内皮细胞钙黏蛋白(VE-cadherin)、晚期糖基化终产物(AGE)与糖尿病大血管病变的关系.设健康对照组20例,糖尿病患者60例,其中伴颈动脉粥样硬化组30例,采用ELISA法测定各组血清可溶性VE-cadherin、AGE,并与病程、血糖水平进行多元逐步回归分析.糖尿病组与颈动脉粥样硬化组的VE-cadherin、AGE水平均高于对照组(均P＜0.05),糖尿病组与颈动脉粥样硬化组之间VE-cadherin差异有统计学意义(P＜0.05).VE-cadherin水平与AGE显著正相关(r=0.69,P＜0.01),AGE与糖尿病病程呈正相关(r=0.31,P=0.02).糖尿病患者血清中可溶性VE-cadherin水平与AGE相关,推测VE-cadherin可能是AGE致动脉粥样硬化的靶点和重要环节.

Abstract：

To investigate the relationship among serum vascular endothelial cells(VE) -cadherin, advanced glycation end-products( AGE), and atherosclerotic lesion. 20 healthy subjects and 60 patients with diabetes mellitus,including 30 patients with carotid atherosclerosis (CI), were enrolled. Soluble VE-cadherin and AGE were determined using the enzyme-linked immunosorbent method (ELISA). The relationships among the concentration of soluble VE-cadherin, AGE, and the course of the disease, blood glucose, and blood lipid levels were analyzed with multivariant stepwise regression analysis. The levels of serum VE-cadherin and AGE in the patients with diabetes and CI were higher than those in control group( P＜0. 05 ). There was a significant difference in VE-cadherin between the diabetes group and the CI group( P＜0. 05 ). Serum VE-cadherin levels were positively correlated with serum AGE levels(r = 0. 69, P＜0. 01 ). AGE levels were positively correlated with the diabetes duration ( r = 0. 31, P =0. 02 ). The levels of serum VE-cadherin in diabetic patients are positively correlated with their serum AGE levels. The VE-cadherin seems to play an important role in the development of atherosclerosis caused by AGE.     

Impaired contractility and remodeling of the upper gastrointestinal tract in diabetes mellitus type-1

AIM To investigate that both the neuronal function of the contractile system and structural apparatus of the gastrointestinal tract are affected in patients with longstanding diabetes and auto mic neuropathy.METHODS The evoked esophageal and duodenal contractile activity to standardized bag distension was assessed using a specialized ultrasound-based probe. Twelve type-1 diabetic patients with autonomic neuropathy and severe gastrointestinal symptoms and 12 healthy controls were studied. The geometry and biomechanical parameters (strain, tension/stress, and stiffness) were assessed.RESULTS The diabetic patients had increased frequency of distension-induced contractions (6.0 ±0.6 vs 3.3 ± 0.5, P ＜ 0.001). This increased reactivity was correlated with the duration of the disease (P =0.009). Impaired coordination of the contractile activity in diabetic patients was demonstrated as imbalance between the time required to evoke the first contraction at the distension site and proximal to it (1.5 ± 0.6 vs 0.5± 0.1, P = 0.03). The esophageal wall and especially the mucosa-submucosa layer had increased thickness in the patients (P ＜ 0.001), and the longitudinal and radial compressive stretch was less in diabetics (P ＜0.001). The esophageal and duodenal wall stiffness and circumferential deformation induced by the distensions were not affected in the patients (all P ＞ 0.14).CONCLUSION The impaired contractile activity with an imbalance in the distension-induced contractions likely reflects neuronal abnormalities due to autonomic neuropathy. However, structural changes and remodeling of the gastrointestinal tract are also evident and may add to the neuronal changes. This may contribute to the pathophysiology of diabetic gut dysfunction and impact on future management of diabetic patients with gastrointestinal symptoms.     

年龄相关性脑白质改变患者认知功能障碍及其特点的研究

Objective To explore the relationship between age-related cerebral white matter changes (ARWMC) and cognitive function, observe the features of cognitive impairment in ARWMC patients, and provide evidences for preventing and treating cognitive impairment in elderly people.Methods Fifty patients with ARWMC were divided into mild-to-moderate group (n= 26, ARWMC score 1-10) and severe group (n= 24, ARWMC score＞ 10) based on the ARWMC scale of CT/MRI scans. Twenty healthy elderly people, who underwent physical examination in hospital, were selected as control group. The cognitive function was evaluated using Montreal Cognitive Assessment (MoCA,Beijing version). Cognitive functions were compared between patients with ARWMC at different extents and the controls. The correlation between severity of ARWMC and cognitive function, the characteristics of cognitive impairment in patients with ARWMC were analyzed. Results The cognitive function in patients with ARWMC was impaired significantly (the MoCA scores were 26.60±1.23 in control group, 23. 19±2. 62 in mild-to-moderate group and 19.83±3. 09 in sever group, F =39. 930, P = 0. 000). The severity of ARWMC was negatively related with MoCA score (r =-0. 476, P=0. 000). The patients showed cognitive impairment especially in the visuoconstructional and executive functions (F= 13. 189, P＜0.05), delayed recall (F=32.340, P＜0.05) and orientation (F= 15.813, P＜0. 05). Conclusions ARWMC is related with cognitive impairment.The severity of white matter changes is correlated with worse cognitive function.     

老年人Barrett食管的内镜表现及病理特征分析

Objective To explore the similarities and differences in endoscopic and pathological characteristics between elderly and non-elderly patients with Barrett esophagus (BE). Methods Three hundred and seventy-one cases with BE were divided into elderly group (n=254) and nonelderly group (n=117). The detection rate, endoscopic findings and pathological changes were assessed. Results The detection rate of BE was 2.9% in the elderly, and 0. 9% in the non-elderly(χ2 =127.8, P＜0.01). The 112 cases (44.1%) of the elderly had reflux symptoms, and so did 87cases (66.7%) of the non-elderly (χ2 =55.9, P＜0.01). The detection rate of BE in the two groups was increased year by year from 2004 to 2008. The detection rate of ring pattern was significantly higher in elderly group than in non-elderly group (28.7% vs. 10.3%, χ2=14.5, P＜0.01). Nonelderly patients had higher rate of island pattern than elderly patients (59.5% vs. 71.7%, χ2=4.7,P＜0.05). There were significant differences in the rate of specialized intestinal metaplasia between elderly and non-elderly patients (42.1% vs. 27.4%, χ2=6.9, P＜0.01). The difference in low and medium grade intraepithelial neoplasm between the two groups had statistical significance (21.3% vs.11.1%, χ2=4.9, P＜0.05). There were two cases with adenocarcinoma in elderly group, but no case was found in non-elderly group. The detection rate of H. pylori was comparable between elderly group and non-elderly group (35.5% vs. 40.9%, χ2=0.40, P＞0.05). Conclusions The elderly patients have the 3.2 times higher detection rate of BE than non-elderly patients. The detection rates of specialized intestinal metaplasia and intraepithelial neoplasm are higher in elderly group than in nonelderly group.     

老年人Barrett食管的内镜表现及病理特征分析

Objective To explore the similarities and differences in endoscopic and pathological characteristics between elderly and non-elderly patients with Barrett esophagus (BE). Methods Three hundred and seventy-one cases with BE were divided into elderly group (n=254) and nonelderly group (n=117). The detection rate, endoscopic findings and pathological changes were assessed. Results The detection rate of BE was 2.9% in the elderly, and 0. 9% in the non-elderly(χ2 =127.8, P＜0.01). The 112 cases (44.1%) of the elderly had reflux symptoms, and so did 87cases (66.7%) of the non-elderly (χ2 =55.9, P＜0.01). The detection rate of BE in the two groups was increased year by year from 2004 to 2008. The detection rate of ring pattern was significantly higher in elderly group than in non-elderly group (28.7% vs. 10.3%, χ2=14.5, P＜0.01). Nonelderly patients had higher rate of island pattern than elderly patients (59.5% vs. 71.7%, χ2=4.7,P＜0.05). There were significant differences in the rate of specialized intestinal metaplasia between elderly and non-elderly patients (42.1% vs. 27.4%, χ2=6.9, P＜0.01). The difference in low and medium grade intraepithelial neoplasm between the two groups had statistical significance (21.3% vs.11.1%, χ2=4.9, P＜0.05). There were two cases with adenocarcinoma in elderly group, but no case was found in non-elderly group. The detection rate of H. pylori was comparable between elderly group and non-elderly group (35.5% vs. 40.9%, χ2=0.40, P＞0.05). Conclusions The elderly patients have the 3.2 times higher detection rate of BE than non-elderly patients. The detection rates of specialized intestinal metaplasia and intraepithelial neoplasm are higher in elderly group than in nonelderly group.     

Diabetic neuropathy as a heterogeneous syndrome: multivariate analysis of clinical and neurological findings

We quantitatively assessed peripheral and autonomic nerve function in diabetic patients and compared them with various parameters of their diabetic status. Motor and sensory nerve conduction velocity (MCV, SCV), vibratory perception threshold (VPT) and the coefficient of variation of the ECG R-R interval (CV R-R) were measured in 85 diabetic patients aged 20-59 years. These values were compared with those of age-matched healthy subjects. Moreover, in 53 patients, MCV, SCV, VPT and CV R-R were investigated by multivariate analysis in relation to clinical parameters. In diabetics, MCV, SCV and CV R-R were significantly lower and VPT was higher than in age-matched healthy controls. The prevalence of impaired values in diabetics was 70% for VPT in the toe, 60% for SCV, and 55% for MCV, CV R-R and VPT in the finger. Impairments of MCV, SCV, CV R-R and VPT were closely correlated with diabetic retinopathy, proteinuria and duration of disease. Categorical regression analysis (multivariate analysis) revealed that the impairment of conduction velocity was closely related to diabetic retinopathy and to hypo- or areflexia, that the impairment of the vibratory perception threshold was related to ischemic changes in ECG and to hypo- or areflexia, and that the reduction of CV R-R was related to orthostatic hypotension and to proteinuria. These findings suggest that diabetic neuropathy progresses in parallel with other complications, and that it is a heterogeneous syndrome rather than a single entity.     

2型糖尿病患者振动觉阈值检测及影响因素

目的 探讨振动觉阈值检测对2型糖尿病患者下肢神经病变的诊断意义及其影响因素.方法 测定2008年8月至2009年4月在我院内分泌代谢科门诊就诊的1018例2型糖尿病患者振动觉阈值,根据振动觉阈值风险度将其分为低风险组(<15 V)484例、中风险组(15～25 V)302例、高风险组(>25 V)232例.比较患者下肢神经病变症状、基本情况和血糖控制指标,分析其影响因素.采用卡方检验、t检验、单因素方差分析等进行统计学分析.结果 低风险组、中风险组、高风险组分别占47.54%、29.67%、22.79%,中风险组、高风险组有神经病变症状者所占比例明显高于低风险组(分别为61.26%、65.52%、39.26%).各组年龄、糖尿病病程、收缩压、糖化血红蛋白及糖化血清蛋白差异有统计学意义(均P<0.05),男性振动觉阈值明显高于女性(P<0.01).振动觉阈值与年龄、性别、糖尿病病程、收缩压、糖化血红蛋白、糖化血清蛋白、空腹血糖呈正相关(P<0.05).多元回归分析显示年龄(P=0.000)、糖化血红蛋白(P=0.046)及糖化血清蛋白(P=0.030)是振动觉阈值的独立影响因素.结论 采用振动觉阈值检测筛查门诊2型糖尿病患者糖尿病周围神经病变的患病率为22.79%,年龄、糖化血红蛋白、糖化血清蛋白是振动觉阈值的独立影响因素.     

Exercise training can modify the natural history of diabetic peripheral neuropathy

BACKGROUND: Diabetes is the most important cause of peripheral neuropathy (DPN). No definitive treatment for DPN has been established, and very few data on the role of exercise training on DPN have been reported. AIM OF THE STUDY: We sought to examine the effects of long-term exercise training on the development of DPN in both Types 1 and 2 diabetic patients. PARTICIPANTS AND METHODS: Seventy-eight diabetic patients without signs and symptoms of peripheral DPN were enrolled, randomized, and subdivided in two groups: 31 diabetic participants [15 f, 16 m; 49+/-15.5 years old; body mass index (BMI)=27.9+/-4.7], who performed a prescribed and supervised 4 h/week brisk walking on a treadmill at 50% to 85% of the heart rate reserve (exercise group: EXE), and a control group of 47 diabetic participants (CON; 24 f, 23 m; 52.9+/-13.4 years old; BMI=30.9+/-8.4). Vibration perception threshold (VPT), nerve distal latency (DL), nerve conduction velocity (NCV), and nerve action potential amplitude (NAPA) in the lower limbs were measured. RESULTS: We found significant differences on Delta (delta) in NCV for both peroneal and sural motor nerve between the EXE and CON groups during the study period (P<.001, for both). The percentage of diabetic patients that developed motor neuropathy and sensory neuropathy during the 4 years of the study was significantly higher in the CON than the EXE group (17% vs. 0.0%, P<.05, and 29.8% vs. 6.45%, P<.05, respectively). In addition, the percentage of diabetic patients who developed increased VPT (25 V) during the study was significantly higher in the CON than the EXE group (21.3% vs. 12.9%, P<.05). Change on Hallux VPT from baseline to the end of the study was significantly different between the EXE and CON groups (P<.05); no significant change in Malleolus VPT between the two groups occurred. CONCLUSIONS: This study suggests, for the first time, that long-term aerobic exercise training can prevent the onset or modify the natural history of DPN.     

Abnormalities of foot pressure in early diabetic neuropathy

Dynamic foot pressure has been studied in 44 diabetic subjects of mean age 52 years with no clinical evidence of neuropathy and in an age and sex matched non-diabetic control group. Vibration perception threshold (VPT), sensory (SCV), and motor conduction velocities (MCV) were also measured in the diabetic subjects. Sixteen diabetic subjects (Group A) had abnormally high pressures under the metatarsal heads (greater than 10 kg/cm2), whereas the remaining 28 diabetic subjects had normal results (Group B). The ratio of toe to metatarsal head loading (normal 0.112) was significantly reduced in Group A (0.077) compared to Group B (0.127: p less than 0.05). VPT and sural nerve SCV were also significantly abnormal in Group A subjects compared with Group B (p less than 0.005 and p less than 0.02, respectively), though there were no differences in MCV. A significant inverse correlation was obtained between toe loading and VPT. It is concluded that abnormalities of foot pressure occur in early sensory neuropathy and may precede clinical abnormalities. Assessment of the toe-loading ratio may provide a sensitive measure of motor dysfunction in early diabetic neuropathy.     

核转录因子κB在糖尿病大鼠坐骨神经中的表达及其与传导速度的关系

目的研究核转录因子出（NF-κB）在糖尿病大鼠坐骨神经中的表达动态变化及其意义。方法建立糖尿病大鼠模型后，分别在实验1个月、3个月、6个月时测定坐骨神经的传导速度和NF-κB的表达量。结果（1）坐骨神经传导速度：与正常对照（NC）组相比，糖尿病模型1个月组大鼠坐骨神经传导速度未见明显下降，3个月、6个月组则明显下降（P〈0．05）；（2）EMSA电泳条带灰度分析：与NC相比，NF-κB表达在糖尿病各组均明显增强（P〈0．05）。结论NF-κB在糖尿病大鼠坐骨神经中持续活化，推断NF-κB在糖尿病周围神经病变的发病机制中起重要作用。     

血浆同型半胱氨酸和胱抑素C与糖尿病周围神经病变的相关性研究

目的 探讨同型半胱氨酸（Hcy）和胱抑素C（Cys-C）与糖尿病周围神经病变（DPN）的相关性. 方法 选取2009年1月至2013年10月于我院就诊的T2DM患者248例,根据2010年版《中国2型糖尿病防治指南》诊断标准将对象分为亚临床糖尿病神经病变组（SDPN组）80例、糖尿病神经病变组（DPN组）52例和单纯T2DM组（T2DM组）116例.检测各组Hcy、Cys-C、FPG、HbA1 c、TG及TC等水平. 结果 3组年龄、性别比、BMI、FPG、TG、TC、HDL-C和LDL-C、SBP、DBP及血清肌酐（Scr）比较差异无统计学意义（P＞0.05）.与T2DM组比较,SDPN组和DPN组病程、Hcy和Cys-C升高（P＜0.05或P＜0.01）,且DPN组Hcy高于SDPN组（P＜0.05）.SDPN组和DPN组正中神经运动神经传导速度（MCV）和感觉神经传导速度（SCV）、腓总神经MCV和SCV较T2DM组降低（P＜0.05或P＜0.01）;DPN组正中神经MCV和SCV、腓总神经MCV和SCV较SDPN组低（P＜0.05或P＜0.01）.SDPN组和DPN组正中神经F波潜伏期和腓总神经H反射潜伏期较T2DM组升高（P＜0.05或P＜0.01）;DPN组正中神经F波潜伏期,腓总神经H反射潜伏期较SDPN组高（P＜0.05或P＜0.01）.Logistic回归分析显示,Hcy、Cys-C、病程、SBP和HbA1c是DPN的独立影响因素. 结论 SDPN和DPN患者神经反射潜伏期延长,MCV和SCV减慢,且血浆Hcy与肌电图各参数相关,提示血浆Hcy与神经传导异常相关,说明血浆Hey可作为DPN的预测因子与危险因素.这两类患者Cys-C浓度升高,且与Hcy水平相关,提示Cys-C可能与Hcy共同作用,加重DPN.     

糖尿病332例神经传导速度检测分析

对３３２例糖尿病患者肢体神经传导速度（ＮＣＶ）检测结果及临床情况进行回顾性分析。结果显示：Ⅰ型糖尿病４８例中，ＮＣＶ异常率为７７．１％，略高于Ⅱ型糖尿病２８４例中的６６．２％，总异常率为６７．８％。Ⅱ型糖悄病者病程〉５年组的ＮＣＶ阳性率（７４．５％）高于≤５年组。３３２例共检测神经２５４６条，其中运动神经传导速度（ＭＣＶ）检测异常率（３７．０％）和感觉神经传导速度（ＮＣＶ）经（３５．２％）相似。各     

糖尿病足截肢患者股神经中小窝蛋白1的表达及意义

目的 探讨糖尿病足截肢患者股神经雪旺氏细胞中小窝蛋白1的表达及意义.方法 40例糖尿病足截肢患者根据2型糖尿病病程分为A(＜6年),B(6～10年),C(＞10年)3组.HE、Weil氏染色观察股神经病理学改变,银染法进行轴突染色并计数股神经纤维密度.应用免疫组化染色检测雪旺氏细胞中小窝蛋白1的表达.结果 3组股神经均存在明显的病理改变,随着病程延长病变加重.3组间股神经纤维密度差异有统计学意义(P＜0.05),股神经纤维密度与HbA1C病程呈负相关(r分别为-0.792和-0.592,均P＜0.01),与小窝蛋白1呈正相关(r=0.721,P＜0.01).3组股神经雪旺氏细胞中均有小窝蛋白1的表达,差异有统计学意义(P＜0.01),小窝蛋白1与HbA1C、病程呈负相关(r分别为-0.762和-0.532,均P＜0.01),与神经纤维密度呈正相关(r=0.721,P＜0.01),小窝蛋白1与HbA1C的偏相关系数r=-0.505(P＜0.01).结论 因足病截肢的患者中,小窝蛋白1在糖尿病周围神经病变及糖尿病足形成过程中可能起重要作用.     

Is ACE Inhibition with Lisinopril Helpful in Diabetic Neuropathy?

Thirteen diabetic patients with hypertension (mean diastolic blood pressure 96.2 ± 1.1 mmHg) were included in a study to assess the effects of lisinopril (20 mg day^?1) on measures of nerve function. Patients had nerve conduction velocity (NCV), temperature discrimination threshold (TDT), and vibration perception threshold (VPT) measurements. At the end of 12 weeks of treatment with lisinopril, there was a significant improvement in median motor NCV (mean change ± SEM 2.7 ± 0.6 m s^?1, p < 0.0001), median sensory NCV (2.1 ± 0.9 m s^?1, p = 0.03), peroneal motor NCV (1.0 ± 0.4 m s^?1, p = 0.03), and sural sensory NCV (1.9 ± 0.7 m s^?1 p = 0.01) values. There were also significant improvements in warm TDT and VPT. Diastolic BP decreased significantly, but there was no significant change in HbA₁. Double blind controlled studies are now needed to confirm the effect of lisinopril on measures of nerve function.     

2型糖尿病踝肱指数与周围神经病变的关系：427例临床分析

目的探讨2型糖尿病患者踝肱指数与糖尿病周围神经病变（DPN）之间的关系。方法对427例2型糖尿病患者采用多普勒血流探测仪测定踝肱指数（ABI）,并依据ABI分为,周围动脉病变（PAD）组（ABI〈0．9）和非PAD组（ABI≥0．9）,同时检测所有患者胫后感觉神经传导速度（NCV）、潜伏期、振幅,进行组间比较,并对上述指标进行线性相关分析及多元线性回归。结果ABI〈0．9者115例,占26．9％,与非PAD组比较,PAD组周围NCV明显下降【左NCV：（30±8）VS（32±7）m／s,右NCV：（29±6）VS（33±7）m／s,P〈0．01],潜伏期延长[左潜伏期：（8．2±2．0）VS（7．4±1．4）ms,右潜伏期：（8．3±1．7）w（7．4±1．3）ms,P〈0．01],振幅下降[左振幅：（10±12）vs（15±16）mV,右振幅：（9±7）vs（14±13）mV,P〈0．011;相关分析显示,踝肱指数与潜伏期呈负相关、与振幅呈正相关;在调整年龄、病程、体质量指数（BMI）、收缩压、总胆固醇、低密度脂蛋白胆固醇（LDL．C）、血肌酐、NCV和振幅,多元逐步回归提示,ABI与年龄、LDL．C、NCV、BMI相关。结论2型糖尿病患者中,PAD可能是DPN的重要危险因素或影响因素。