Objective To study the advances in microcirculation after islets of Langerhans transplantation (ILT). Methods The literature in the recent years on the study of the relationship between ILT and microcirculation was reviewed. Results The process of angiogenesis and revascularization of the islet grafts was in progress within 1 week after transplantation, and was completed within 10-14 days after transplantation, exhibiting a microangioarchitecture similar to pancreatic islets in situ. The sequence of vascular intraislet cellular perfusion was from β cells outward to α-and δ-cell cortex, with the majority of α cells perfused before the majority of δ cells. Freely transplanted islet grafts were revascularized from the hostderived microvascular bed. The interstitial pressure in the islet transplants was markedly lower than the capillary pressure. There were clearly differences in microcirculation between syngeneic and xenogeneic islet grafts. The phenomena of microcirculation failure were observed in xenografts. The influential factors of microcirculation after ILT were ①culture temperature of isolated islets, ②cultured time and cryopreserved method of islets, ③blood glucose, ④immunosuppressive agents, ⑤angiogenesis factors. Conclusion Microvascularization of freely islet grafts is one of the essential requirements for successful engraftment, guaranteeing sufficient nutritional blood supply to the tissue and establishing blood drainage for adequate liberation of the endocrine hormones. Through the studies of the microcirculation after ILT, it is helpful to recognize the mechanism of the survival of islet grafts.
ObjectiveTo explore the morbidity rate and risk factors of proliferative diabetic retinopathy (PDR) in type 2 diabetes.MethodsThe clinical data of patients, with PDR in 2739 consecutive cases of type 2 diabetes diagnosed in this hospital from 1994 to 2001 were analyed retospectively. The diagnosis of diabetic retinopathy (DR) was confirmed by ophthalmoscopy and fundus fluorescein angiography (FFA). Blood pressure, fasting and postprandial blood sugar, glycosylated haemoglobin（HbA1c）, total serum cholesterol, triglyceride, creatinine, and albumin excretion rate were measured.ResultsThe morbidity rate of type 2 DR was 27.8%（761/2739）, and the morbidity rate of PDR was 4.2%（114/2 739） occupying 15% of the patients with DR. The duration, fasting blood sugar, glycosylated haemoglobin, blood pressure and albumin excretion rate were much higher than those in the control（P＜0.01, glycosylated haemoglobin P＜0.05）. The independent risk factors of PDR were duration of the disease （r=0.15, P＜0.01） and albumin excretion rate （r=0.08, P＜0.05）. The risk factors of PDR were albumin excretion rate and fasting blood sugar (r=0.13, P＜0.05) in patients with longer duration(≥5 years). The morbidity rate of PDR was 2.3%, 5.9% and 12.4% in patients with duration less than 5 years, 5 to 10 years and over 10 years groups, respectively. The morbidity of PDR of the patients in normal albuminuria, microalbuminuria and overt albuminuria group was 2.1%、5.3% and 18.8% respectively.ConclusionsType 2 diabetes accompanied with PDR is relative to the duration of the diabetes, albumin excretion rate, fasting blood sugar, blood pressure, and glycosylated haemoglobin, in which the duration of the disease, albuminuria and fasting blood sugar are the risk factors of occurance of PDR. (Chin J Ocul Fundus Dis, 2003,19:338-340)
目的 了解糖尿病患者院外自行注射胰岛素存在的风险。 方法 2010年1月－12月，通过随访调查老年组83例，中青年组69例糖尿病患者院外自行注射胰岛素的实施情况，对存在的问题进行归类、统计。调查的内容主要包括3个方面：胰岛素装置的正确使用、胰岛素的规范注射、血糖监测及低血糖处理。分析两组患者院外注射胰岛素的风险，并对存在的问题进行原因分析、提出解决方法。 结果 发放调查表152份，有效回收131份，其中老年组73份，中青年组58份。在胰岛素装置使用方面，老年组存在问题48项，中青年组27项，两者间差异无统计学意义（χ2=2.432，P＞0.05）。在胰岛素的规范注射方面，老年组存在问题176项，中青年组77项，老年组在胰岛素注射方面存在的问题明显高于中青年组（χ2=25.009，P＜0.001）。在低血糖的认识及正确处理上，老年组存在问题115项，中青年组33项，两组差异具有统计学意义（χ2=40.383，P＜0.001）。 结论 糖尿病患者院外自行注射胰岛素存在诸多风险。老年糖尿病患者院外胰岛素注射需在他人协助、监督下进行。
The islet transplantation site can be divided into two categories: orthotopic islet transplantation and ectopic islet transplantation. Orthotopic islet transplantation refers to that the insulin secreted and released from the transplanted islet will be metabolized into the liver through the hepatic portal vein system, which does not change the original insulin metabolic pathway, including the portal vein of the liver, the greater omentum. The insulin secreted by the ectopic islet transplantation changes the original metabolic pathway of insulin. The ideal islet transplantation site generally has the following characteristics: high success rate transplantation, high long-term survival rate of graft, simple operation, less trauma, less complications, low risk, easy to repeat detection and so on. This article provides a review of the current research status of each islet transplantation site, in order to provide reference for future related research.
目的 正确评价胰岛素瘤的各种定位诊断方法和各种手术治疗方法。 方法 回顾性分析吉林大学第一医院普外科与吉林省肿瘤医院普外科1985年6月至2005年6月期间诊治的38例胰岛素瘤的临床资料，系统评价术前超声、术中超声、术前CT及术前增强CT定位诊断方法。结果 术前超声、术前CT、术前增强CT及术中超声检查其确诊率分别为47.4%、51.5%、85.7%及100%。行肿瘤局部摘除术21例，单纯远端胰腺切除术14例，远端胰腺切除术联合脾摘除3例。结论 胰岛素瘤的术前定位诊断较困难，术前超声与术前CT在术前定位诊断方面差异无统计学意义，术前增强CT能够明显提高胰岛素瘤的术前诊断率，术中超声是胰岛素瘤最有效的定位诊断方法。行肿瘤摘除术是治疗良性胰岛素瘤的最佳方式，能够降低术后并发症发生率。多发性胰岛素瘤或恶性胰岛素瘤应行胰腺次全切除术以避免复发，必要时可联合脾脏摘除。
Objective To study the therapeutic effect of Roux-en-Y gastric bypass （RYGB） on type 2 diabetes mellitus （T2DM） rats and explore the possible mechanism of vaspin in RYGB on T2DM. Methods Twenty SD rats with T2DM and 20 age- and sex-matched normal SD rats were randomly divided into 4 groups according to the random digits table：T2DM-RYGB group， T2DM-sham operation （SO） group，RYGB group，and SO group，10 rats in each group. Fasting plasma glucose （FPG） level，serum insulin （INS） level，vaspin level，and homeostasis model of insulin resistance （HOMA-IR） were determined before operation and on week 4，8 after operation，respectively．At the same time，the correlation between vaspin and the indicators （FPG，INS，or HOMA-IR） was analyzed．Results Compared the indicators after operation with before operation，the FPG level，INS level，vaspin level，and HOMA-IR were not significantly different between the T2DM-RYGB group and T2DM-SO group （P＞0.05） or between the RYGB group and SO group （P＞0.05），but the FPG level，INS level，vaspin level，and HOMA-IR in the T2DM-RYGB group and T2DM-SO group were significantly higher than those in the RYGB group （P＜0.05） and SO group （P＜0.05），respectively. On week 4 after operation，the FPG level，INS level，vaspin level，and HOMA-IR decreased in the T2DM-RYGB group，except for the FPG level，the other indexes had no significant differences as compared with the values before operation. On week 8 after operation，the FPG level，INS level，vaspin level，and HOMA-IR further decreased in the T2DM-RYGB group，there were significant differences of these indicators between before operation and on week 8 after operation. Compared the indicators after operation with before operation，the FPG level，INS level，vaspin level，and HOMA-IR were not statistically significant （P＞0.05） in the T2DM-SO group，RYGB group，or SO group. The changes in serum vaspin level correlated positively with those in INS and HOMA-IR before operaion and on week 4，8 after operaion in the T2DM-RYGB group and T2DM SO group rats （P＜0.05），respectively. Conclusions RYGB surgery has a therapeutic effect on T2DM rats，and serum vaspin level decreases and insulin resistance is improved after RYGB surgery，which may be one of the mechanisms of the treatment for T2DM.
目的:探讨盐敏感性高血压患者胰岛素抵抗与脂联素代谢异常的关系。方法:对100例高血压患者采用急性盐水负荷试验,确定65例为盐敏感性(SS)高血压患者,35例为盐不敏感性(NSS)高血压患者,选定正常人50例为对照组,分别测其胰岛素水平、血脂、血尿酸及脂联素水平。结果:高血压患者存尿酸、胆固醇、甘油三酯水平升高(Plt;0.01),SS组较NSS组的血尿酸、血胆固醇、血甘油三脂增高(Plt;0.01)。SS组脂联素［(6.04±2.08)ng/mL］,较NSS组［(7.89±3.35)ng/mL(Plt;0.01)］降低,且SS组存在胰岛素抵抗,HOMA指数分别为［2.54±0.53,2.21±0.55(Plt;0.01)］。血浆脂联素水平与胰岛素抵抗指标存在正相关,r=-0.36,(Plt;0.01)。结论:盐敏感性高血压患者存在胰岛素抵抗及脂联素降低,胰岛素抵抗可能是其他代谢异常及脂联素降低的基础。
摘要:目的:探讨2型糖尿病合并糖尿病足患者与胰岛素抵抗的关系。方法:205例2型糖尿病患伴糖尿病足患者作为观察组,无足部病变的糖尿病患者作为对照组,观察其体重指数、空腹血糖、胰岛素、血脂等指标,两组间进行比较并相关性分析、多元回归分析。胰岛素抵抗指数(HOMAIR)=FPG×FIns/22.5。结果:糖尿病足患者的HOMAIR显著高于无糖尿病的患者(Plt;0.05)。多元回归分析显示糖尿病病程、LDL及BMI是影响2型糖尿病足患者胰岛素抵抗的主要危险因素。结论:糖尿病足患者存在着更严重的胰岛素抵抗。Abstract: Objective: To discuss the relationship between diabetes and pedopathy of type II diabetes and insulin resistance. Methods:The diabetes type II patients were divided into group A (combined with pedopathy) and group B (without pedopathy). The blood glucose and insulin of empty stomach, BMI,Alc and lipid were detected. The insulin resistance index (HOMAIR) was calculated and compared between two groups. Results:The HOMAIR was higher in group A than that in group B (Plt;0.05).The duration of disease,LDL and BMI was positive related with diabetes pedopathy. Conclusion:The insulin resistance was more worse in pedopathy of Type II diabetes.