2型糖尿病高血压患者血浆内源性分泌型晚期糖基化终末产物受体和氧化应激的关系

探讨2型糖尿病高血压患者血浆内源性分泌型晚期糖基化终末产物受体(esRAGE)与氧化应激的关系.结果 显示2型糖尿病患者esRAGE与体重指数(BMI,r=-0.33)、舒张压(r=-0.38)、氧化应激均显著相关(均P相似文献   

多囊卵巢综合征患者糖代谢与胰岛素抵抗的研究

目的 研究多囊卵巢综合征（PCOS）患者糖耐量异常和2型糖尿病的发生率，探讨糖代谢异常与胰岛素抵抗的关系。方法 30例PCOS患者，行口服葡萄糖耐量及胰岛素释放实验。用稳态模型胰岛素抵抗指数（HOMAIR）评价胰岛素抵抗。结果 糖耐量低减发生率为26．7％（8／30），2型糖尿病发生率为6．7％（2／30）；糖耐量低减和糖尿病患者的体重指数（BMI）、空腹血糖、空腹胰岛素及服糖后1h、2h的血糖、胰岛素值、HOMAIR均高于糖耐量正常患者，有显著性差异（P〈o．05）。结论 PCOS患者存在较高的糖代谢异常发生率，肥胖和胰岛素抵抗是影响其糖耐量的重要因素，口服葡糖糖耐量试验是用于监测PCOS患者糖代谢的较好指标。     

实验性糖尿病肺细胞外基质免疫组织化学研究

目的 观察糖尿病４周大鼠肺细胞外基质的变化。方法 采用特殊染色,免疫组织化学方法和图像分析技术,了解肺细胞外基质变化。结果 糖尿病肺弹性纤维,胶原纤维和网状纤维增多,增粗;Ⅳ型胶原吾索状或丛状分布于肺泡隔,细支气管基底膜和毛细血管基底膜,图像分析表明,糖尿病肺弹性纤维,胶原纤维,网状纤维、Ⅳ型胶原和层粘连蛋白的着色面积,积分光密度和相对含量均高于对照组。结论 提示糖尿病早期已存在肺细胞外基质异常变     

2型糖尿病肾病患者血清视黄醇结合蛋白-4变化与氧化应激的关系

目的探讨2型糖尿病肾病(DN)患者血清视黄醇结合蛋白-4(RBP4)变化及其与氧化应激的关系。方法检测DN患者血清RBP4、血浆8-异前列腺素F2α(8-iso-PGF2α)、血浆超氧化物歧化酶(SOD)活性、总抗氧化能力(TAC)和丙二醛(MDA)含量。结果在单纯糖尿病(DM)组8-iso-PGF2α明显高于对照组(P0.01),SOD和TAC明显低于对照组(P0.01);早期DN组和临床DN组患者8-iso-PGF2α、MDA和血清RBP4明显高于对照组(P0.05,P0.01);临床DN组患者8-iso-PGF2α和血清RBP4明显高于单纯DM组和早期DN组(P0.05,P0.01)。DM患者血清RBP4与腰围/臀围(WHR)、空腹血糖(FBG)、收缩压(SBP)、尿白蛋白排泄率(UAER)和8-iso-PGF2α显著性正相关(分别为r=0.39、0.37、0.33、0.39、0.41,P0.05),与血肌酐(Cr)和SOD呈显著性负相关(分别为r=-0.28、-0.35,P0.05)。多元逐步回归分析显示WHR、UAER和8-iso-PGF2α均为影响血清RBP4水平的显著因素。结论DN患者血清RBP4水平增加与WHR、UAER和氧化应激有关。     

肥胖男性患者血浆8异前列腺素F2α与细胞黏附分子的关系

目的 探讨男性单纯肥胖患者血浆8异前列腺素F2α水平与细胞黏附分子的关系.方法 测定36例男性肥胖患者和30例健康非肥胖男性个体的血8异前列腺素F2α(8～iso-PGF2α),可溶性细胞间黏附分子1(sICAM-1)和E选择素.结果 肥胖患者体质量指数(BMI)、腰围/臀围(WHR)、空腹胰岛素、胰岛素抵抗指数(HOMA-IR)、血浆8-iso-PGF2α、sICAM-1和E选择素均显著高于正常个体(P＜0.05或P＜0.01).男性肥胖组相关分析:8-iso-PGF2α与BMI、E选择素和HOMA-IR呈正相关(相关系数分别为0.28,0.33,0.31,P＜0.05).多元逐步回归分析:校正年龄和BMI后,偏相关分析显示,血浆8-iso-PGF2α仍与E选择素呈正相关(r=0.265,P＜0.05).结论 血浆8-iso-PGF2α可能是男性单纯肥胖患者发生细胞黏附分子变化的重要因素之一.     

肥胖和非肥胖2型糖尿病患者sICAM-1和sVCAM-1与氧化应激关系的比较研究

细胞粘附分子 (ｃｅｌｌａｄｈｅｓｉｏｎｍｏｌｅｃｕｌｅ,ＣＡＭ)在 2型糖尿病 (ＤＭ )及其并发症中的作用已得到充分的评价。ＣＡＭ与细胞所处的氧化还原状态密切相关 ,研究表明氧化应激在 2型ＤＭＣＡＭ变化中发挥一定的作用。肥胖可加重 2型ＤＭ血管并发症的发生 ,诱导ＣＡＭ增加。本研究拟通过对肥胖2型ＤＭ患者血清可溶性细胞间粘附分子 1(ｓＩＣＡＭ 1)、可溶性血管细胞粘附分子 1(ｓＶＣＡＭ 1)及氧化应激变化的观察 ,探讨肥胖对ＣＡＭ及氧化应激的影响。一、对象和方法1.对象 :选取 1998年 12月 1日至 1999年 12月 31日我院内分…     

高糖危象患者血清瘦素和氧化应激的关系

Objective To investigate the relationship between the levels of serum leptin and oxidative stress in patients with hyperglycemia crisis. Methods A total of 96 patients with diabetic ketoaeidosis (DKA) and nonketotic hyperglycemia (NKH) were treated on a low-dose insulin protocol using intravenous infusion of insulin with the established rate of 0.1U·kg-1·h-1,with the patients on intravenous fluids and receiving nutrition by mouth and vein. The levels of serum leptin, 8-iso-prostaglandin F2α (8-iso-PGF2α, the activities of superoxide dismutase (SOD), total antioxidant capacity (TAC) and the contents of malondialdehyde (MDA) in 96 patients with hyperglycemia crisis on admission and after insulin therapy with resolution of hyperglycemia and ketoacidosis (72 hours) were measured. Another 35 healthy individuals served as normal control. Results The activities of SOD, TAC and the levels of leptin before treatment were lower in patients with hyperglycemia crisis than in normal controls, and the levels of MDA and 8-iso-PGF2a were more markedly elevated than those in normal controls (all P<0. 05). The activities of SOD, TAC and the levels of leptin in patients after treatment were significantly higher than those in patients before treatment, and the levels of MDA and 8-iso-PGF2a. were significantly lower than those in patients on admission (all P<0. 05). There was significant positive correlation between leptin and MDA in patients before treatment (r=0. 38, P<0. 05), and the level of leptin was negatively correlated with MDA and 8-iso-PGF2a in patients after treatment (r1 = - 0. 35, r2= - 0. 37, both P < 0. 05). In stepwise regression analysis, MDA and 8-iso-PGF2α showed a significant association with leptin. Conclusion The levels of leptin are significantly lowered in patients with hyperglycemia crisis. Oxidative stress may participate in determining the leptin level in hyperglycemia crisis.     

糖尿病大鼠肋间肌微量元素与氧化应激变化的研究

目的：了解糖尿病肋间肌微量元素与氧化应激的关系。方法:采用原子吸收光谱法,测定糖尿病28 d大鼠肋间肌组织中铜(Cu)、锰(Mn)、锌(Zn)、铁(Fe)、镉(Cd)、铬(Cr)、钴(Co)、钼(Mo)和锂(Li)的含量,并同时测定超氧化物歧化酶(SOD)活性和丙二醛(MDA)含量。结果:糖尿病肋间肌Cu、Zn、Fe、Cr、Li含量明显低于对照组, Cd明显高于对照组,而Mn、Co 、Mo 与对照组无明显差别。糖尿病肋间肌组织SOD活性明显低于对照组，MDA含量明显高于对照组。糖尿病肋间肌组织Zn和Cu含量与其SOD活性呈正相关, Cd含量与SOD 活性呈负相关，Zn与MDA含量呈负相关。结论:糖尿病28 d 肋间肌组织存在Cu、Zn、Fe、Cd、Cr、Li 含量的变化及氧化应激增加,Zn、Cu和Cd 在糖尿病肋间肌组织氧化应激变化中具有重要意义。     

高糖危象患者血清瘦素和氧化应激的关系

Objective To investigate the relationship between the levels of serum leptin and oxidative stress in patients with hyperglycemia crisis. Methods A total of 96 patients with diabetic ketoaeidosis (DKA) and nonketotic hyperglycemia (NKH) were treated on a low-dose insulin protocol using intravenous infusion of insulin with the established rate of 0.1U·kg-1·h-1,with the patients on intravenous fluids and receiving nutrition by mouth and vein. The levels of serum leptin, 8-iso-prostaglandin F2α (8-iso-PGF2α, the activities of superoxide dismutase (SOD), total antioxidant capacity (TAC) and the contents of malondialdehyde (MDA) in 96 patients with hyperglycemia crisis on admission and after insulin therapy with resolution of hyperglycemia and ketoacidosis (72 hours) were measured. Another 35 healthy individuals served as normal control. Results The activities of SOD, TAC and the levels of leptin before treatment were lower in patients with hyperglycemia crisis than in normal controls, and the levels of MDA and 8-iso-PGF2a were more markedly elevated than those in normal controls (all P<0. 05). The activities of SOD, TAC and the levels of leptin in patients after treatment were significantly higher than those in patients before treatment, and the levels of MDA and 8-iso-PGF2a. were significantly lower than those in patients on admission (all P<0. 05). There was significant positive correlation between leptin and MDA in patients before treatment (r=0. 38, P<0. 05), and the level of leptin was negatively correlated with MDA and 8-iso-PGF2a in patients after treatment (r1 = - 0. 35, r2= - 0. 37, both P < 0. 05). In stepwise regression analysis, MDA and 8-iso-PGF2α showed a significant association with leptin. Conclusion The levels of leptin are significantly lowered in patients with hyperglycemia crisis. Oxidative stress may participate in determining the leptin level in hyperglycemia crisis.     

血管紧张素Ⅱ受体拮抗剂对糖尿病肾病患者微量白蛋白尿的作用不受血压影响

目的研究血管紧张素Ⅱ受体拮抗剂(ARB)氯沙坦对2型糖尿病、糖尿病肾病患者微量白蛋白尿的治疗效果。方法血压正常的2型糖尿病患者43例,其尿白蛋白排泄率(UAER)在20~200μg/min之间,其血糖控制在可接受水平[空腹血糖(FBG)≤7mmol/L,餐后2h血糖(P2hBG)≤10mmol/L]。随机分为治疗组23例,对照组20例,对照组在控制血糖基础上加用安慰剂,治疗组加用ARB氯沙坦50mg/d。两组患者在治疗前和治疗12周后复查FBG、P2hBG、糖化血红蛋白(HbA1c)和UAER。结果治疗12周后,治疗组UAER为(76±11)μg/min,与治疗前(119±14)μg/min相比明显下降(P<0·05),与对照组(125±13)μg/min比较,差异有显著性(P<0·05)。结论对血压正常的2型糖尿病早期糖尿病肾病患者,ARB氯沙坦在对血压无影响的情况下具有独特的降低尿微量白蛋白水平,延缓糖尿病肾病进展的作用。