白藜芦醇对妊娠期糖尿病大鼠降低血糖和抗氧化能力的影响

目的:研究白藜芦醇(Resveratrol)对妊娠期糖尿病大鼠降低血糖和抗氧化能力的影响。方法:取120只妊娠5天SD大鼠,通过一次性腹腔注射链脲佐菌素(STZ)35 mg/kg制备大鼠糖尿病模型,随机分为6组:妊娠糖尿病模型对照组,白藜芦醇(30、60、120和240 mg/kg)治疗组和盐酸二甲双胍(200mg/kg)阳性对照组,每组20只;另取20只妊娠5天SD大鼠作为正常妊娠对照组,以及20只非妊娠雌性大鼠作为正常非妊娠对照组。分别检测第0、7、14天的空腹血浆血糖和胰岛素水平;治疗满2周后,检测各组大鼠血清中谷丙转氨酶(ALT)、谷草转氨酶(AST)、碱性磷酸酶(ALP)活性,丙二醛(MDA)含量以及总抗氧化能力(T-AOC);检测肝脏组织中超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)活性;通过苏木精-尹红(HE)染色观察肝脏组织病理形态学改变,通过原位末端标记法(TUNEL)观察肝细胞凋亡状况。结果:与正常非妊娠对照组相比,正常妊娠对照组大鼠空腹血浆血糖和胰岛素水平,血清中ALT、AST、ALP活性及MDA含量和T-AOC水平,肝脏组织中SOD、GSH-Px、CAT活性均无显著性差异;且肝脏组织病理形态学改变和肝细胞凋亡状况均无明显变化。与妊娠期糖尿病模型组相比,白藜芦醇(60、120和240mg/kg)治疗组大鼠血清中ALT、AST活性和MDA含量显著降低;白藜芦醇(120和240 mg/kg)治疗组大鼠血糖水平显著降低、胰岛素水平显著升高,血清中ALP活性显著降低,肝脏组织中SOD、GSH-Px、CAT活性显著升高,白藜芦醇治疗组大鼠肝组织病理形态学改变和肝细胞凋亡状况均明显减轻。白藜芦醇240 mg/kg治疗组大鼠血清中T-AOC水平和肝脏组织中SOD、GSH-Px、CAT活性较盐酸二甲双胍阳性对照组显著升高,但二者对糖尿病大鼠胰岛素分泌、血糖水平以及血清中ALT、AST、ALP、MDA含量的影响无显著性差异。结论:白藜芦醇对妊娠期糖尿病大鼠具有剂量依赖性的降低血糖和提高抗氧化能力作用,该作用可能与其能够有效提高胰岛素水平和改善抗氧化酶系统的活性有关。     

脱水淫羊藿素对老年大鼠的抗氧化作用

目的研究脱水淫羊藿素对衰老大鼠的抗氧化作用。方法以10只2月龄雌性SD大鼠为青年大鼠组,以20只12月龄的SD大鼠为实验组,分为老年大鼠组和服药组。服药组每日灌服25 mg/kg脱水淫羊藿素,老年大鼠组和青年大鼠组灌服给予等体积蒸馏水。2个月后麻醉处死大鼠。取血清检测丙二醛(MDA)含有量,同时检测血清中抗氧化因子超氧化物歧化酶(SOD)、过氧化氢酶(CAT)和谷胱甘肽过氧化物酶(GSH-Px)的活性。剥离大鼠肝脏和脑组织,研磨后检测脂褐质(Lf)含有量,检测组织中SOD、CAT和GSH-Px活性。研磨肝脏提取总RNA后,RTPCR检测SOD和CAT mRNA表达量。结果与青年大鼠相比,老年大鼠血清MDA含有量显著升高,肝脏和脑组织Lf含有量明显增加。同时血清和组织中抗氧化因子SOD、CAT和GSH-Px活性显著下降。老年大鼠服药后,服药组和老年大鼠组相比,MDA和Lf含有量显著降低,血清和组织中抗氧化因子SOD、CAT和GSH-Px活性显著升高。SOD和CAT mRNA表达检测结果显示,衰老后SOD和CAT mRNA表达显著降低,当服用药物后SOD和CAT mRNA表达显著升高。结论脱水淫羊藿素能够显著提高老年大鼠体内抗氧化因子的活性,对于老年大鼠具有很好的抗氧化作用。     

复方丹参注射液对早发型重度子痫前期患者抗氧化酶/氧化应激产物水平的影响

目的观察复方丹参注射液对子痫前期患者抗氧化酶/氧化应激产物水平的影响。方法将患者平均分为两组,对照组给予常规治疗,观察组在此基础上加用复方丹参注射液静滴,治疗7 d。另择50例门诊产检的正常妊娠妇女(孕周及年龄匹配)为正常对照组,检测治疗前各组、治疗后对照组和观察组超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)活力;氧化应激代谢产物丙二醛(MDA)、脂质过氧化物浓度(LPO)、晚期蛋白质氧化产物(AOPP)的含量。结果 (1)治疗前,与正常对照组比较,对照组与观察组患者血清中抗氧化酶SOD、GSH-Px、CAT活力均明显下降,血清中氧化损伤产物AOPP、LPO及MDA均明显升高,而对照组和观察组两组中上述指标均无明显差异。(2)治疗后观察组患者血清中抗氧化酶SOD、GSH-Px、CAT活力均明显升高,血清中氧化应激产物AOPP、LPO和MDA均较治疗前明显降低;对照组血清中抗氧化酶SOD、GSH-Px、CAT活力及氧化应激产物AOPP、LPO及MDA较治疗前均无明显差异。结论早发型重度子痫前期患者在着严重的氧化应激,复方丹参注射液能有效改善早发型重度子痫前期患者氧化应激状态。     

秋茄枝乙醇提取物对2型糖尿病大鼠肝脏氧化损伤的保护作用

目的 研究秋茄枝乙醇提取物(EEK)对2型糖尿病(T2DM)大鼠肝脏氧化损伤的保护作用.方法 以高脂饲料喂养联合链脲佐菌素(STZ)建立T2DM大鼠模型.大鼠分为正常对照组,T2DM模型组,二甲双胍组,EEK低、中、高剂量组.大鼠给药4周后采血测定空腹血糖(FBG).动物处死后取肝脏称重,计算肝脏系数,然后制备肝脏组织匀浆,测定超氧化物歧化酶(SOD)、过氧化氮酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)活性和丙二醛(MDA)含量.结果 EEK减小T2DM大鼠肝脏体积,降低肝脏系数、血糖和MDA,而升高肝脏SOD、GSH-Px、CAT活性.结论 EEK能降低血糖,并通过抗氧化作用保护2型糖尿病大鼠肝脏.     

大蒜对实验性糖尿病大鼠体内脂质过氧化物及抗氧自由基酶类活性的影响

目的:为探讨大蒜治疗糖尿病的作用机制,观察了大蒜对四氧嘧啶实验性糖尿病大鼠血糖水平以及脂质过氧化物(LPO)含量和抗氧自由基酶类活性的影响。方法:对正常对照组、糖尿病对照组和补大蒜组大鼠体内的上述指标作了检测。结果:补大蒜组大鼠血糖水平明显低于糖尿病对照组(P<0.01);血浆、胰腺和肌肉 LPO 含量显著低于糖尿病对照组(P<0.05);超氧化物歧化酶(SOD)活性在肝、胰腺和肌肉内明显高于糖尿病对照组;红细胞、肝和肌肉内的谷胱甘肽过氧化物酶(GSH-Px)活性明显高于糖尿病对照组(P<0.05)。结论:该结果提示大蒜具有降低实验性糖尿病大鼠血糖的作用,其与提高抗氧自由基酶类活性及抗过氧化伤害有密切关系。     

健脾补血方对运动员抗氧化能力的影响

目的 观察健脾补血方对运动员抗氧化能力的影响.方法 将60名进行同等强负荷运动的运动员随机分为实验组和对照组各30例,实验组给予健脾补血方,对照组给予相同剂型安慰剂,两组均每日1剂,疗程14天,检测两组运动员给药前后血清总抗氧化能力(T-AOC)、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)的活性以及丙二醛(MDA)的含量. 结果 给药后实验组运动员血清T-AOC、SOD、CAT和GSH-Px活性明显高于本组给药前及对照组给药后(P＜0.05),MDA含量显著低于本组给药前及对照组给药后(P＜0.05).结论 健脾补血方可以显著提高运动员抗氧化的能力.     

巴戟天寡糖对大鼠子宫缺血再灌注损伤的抗氧化作用

目的:探讨巴戟天寡糖对大鼠子宫缺血再灌注损伤的抗氧化作用。方法:将50只大鼠随机分为假手术组,模型对照组,巴戟天寡糖低、中、高剂量组5组,每组10只。巴戟天寡糖低、中、高剂量组按体质量依次给予质量分数70,140,280 g/L巴戟天寡糖液10μL/g灌胃,假手术组和模型对照组按体质量给予10μL/g双蒸水灌胃,1 d 1次,连用7 d。末次给药后1 h采用线栓法制备大鼠子宫缺血再灌注损伤模型。取出大鼠子宫,检测其超氧化物歧化酶(SOD)、谷胱甘肽过氧化物酶(GSH-Px)、过氧化氢酶(CAT)及丙二醛(MDA)和过氧化脂质(LPO)水平。结果:与模型对照组对比,巴戟天寡糖低、中、高剂量组SOD、GSH-Px、CAT水平升高,而MDA、LPO水平降低,差别有统计学意义(P0.05)。3个巴戟天寡糖组SOD、GSH-Px、CAT、MDA、LPO水平两两对比,差别均有统计学意义(P0.05)。结论:巴戟天寡糖对子宫缺血再灌注损伤具有抗氧化作用,可能是通过抗氧化来减轻子宫组织的损伤。     

加减黄连温胆汤对血管性痴呆大鼠氧化应激的影响

目的观察加减黄连温胆汤对血管性痴呆大鼠空间探索试验和大脑中氧化应激指标过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)、超氧化物歧化酶(SOD)和丙二醛(MDA)的影响方法实验分为空白组、假手术组、模型组、安理申对照组、加减黄连温胆汤低剂量组、加减黄连温胆汤高剂量组,通过化学比色法测定CAT、GSH-Px、SOD和MDA活性或者含量变化。结果模型组与空白组、假手术组比较,脑组织CAT、GSH-Px、SOD的活性明显降低,MDA含量升高,均有显著性差异;中药高剂量组、中药低剂量组与模型组比较,除中药低剂量组CAT与模型组比较无明显差异外,中药高剂量组组CAT和两组GSH-Px、SOD活性升高,MDA含量下降,均具有显著性差异。结论加减黄连温胆汤能提高血管性痴呆模型大鼠CAT、GSH-Px和SOD的活性,降低MDA活性,通过抗氧化作用对血管性痴呆模型大鼠起到治疗作用。     

四大怀药延缓衰老作用的研究

本实验观察了怀牛膝、怀菊花、怀山药、怀地黄各单味药及四药合剂对小鼠血中超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)活性和过氧化脂质(LPO)的影响。结果表明,"四大怀药"合剂可明显增强鼠血中 SOD 的活性和 GSH-PX 的活力,使 LPO 显著降低。各单味药亦可增强 GSH-Px 的活性,使 LPO 降低。上述结果说明,四大怀药可能具有延缓衰老的作用。     

多发梗塞性痴呆大鼠海马抗氧化酶活性的变化及针刺的干预作用

目的:探讨多发梗塞性痴呆大鼠脑内抗氧化酶活性的变化及针刺的干预作用.方法:通过栓子注入法制作多发梗塞性痴呆模型,随机分为模型组、针刺组和非穴组,并设正常组和假手术组作对照.观察各组大鼠海马区丙二醛(MDA)含量、超氧化物歧化酶(SOD)、过氧化氢酶(CAT)、谷胱甘肽过氧化物酶(GSH-Px)活性的变化情况.结果:与正常组比较,模型组海马MDA含量明显升高,SOD及GSH-Px活性明显下降,CAT活性无明显变化.针刺可明显逆转上述异常改变,与正常组比较无显著差异.结论:SOD/GSH-Px途径在多发梗塞性痴呆大鼠脑内抗氧化体系中占居主导地位,CAT可能不是脑内主要的抗氧化酶.针刺通过提高SOD/GSH-Px活性在脑内发挥抗氧化作用,这可能是其治疗血管性痴呆的重要机制.     

Experimental diabetes treated with Achillea santolina: effect on pancreatic oxidative parameters

Oxidative stress is produced under diabetic condition and is likely involved in progression of pancreatic damage found in diabetes. In the present study, we examined possible protective effect of Achillea santolina L. (Compositae) against pancreatic damage in streptozotocin (STZ)-treated diabetic rats. Achillea santolina extract (ASE) is used by the traditional healers in many part of Iraq, as a hypoglycaemic agent. We evaluated the effect of ASE on blood glucose level, serum nitric oxide (NO) concentration and the oxidative stress status in rat pancreatic tissue. STZ was injected intraperitonealy at a single dose of 40mgkg(-1) to induce diabetes. ASE (0.1g/kgday) was orally administered to a group of diabetic rats for 30 consecutive days. Results showed significant reduction in the activities of superoxide dismutase (SOD), catalase (CAT) and pancreatic glutathione (GSH) levels in the diabetic rats compared to the control subjects. On the other hand, blood glucose level, serum NO, malondialdehyde (MDA), a marker of lipid peroxidation, protein oxidation indices including protein carbonyl (PCO) and advanced oxidation protein products (AOPP) were significantly elevated in pancreas of the diabetic group. Treatment with ASE reduced blood glucose level, serum NO, pancreatic MDA, PCO and AOPP. In addition, the content of GSH was restored to the normal level of the control group. Furthermore, ASE significantly increased CAT and SOD activities in ASE-treated rats. Based on our data, it can be concluded that Achillea santolina have a high hypoglycaemic activity and this may be attributed to its antioxidative potential.     

枸杞在糖尿病大鼠视网膜组织抗氧化反应中的作用

探讨枸杞在糖尿病大鼠视网膜组织抗氧化反应中的作用。方法：３６只Ｗｉｓｔａｒ大鼠随机分为Ⅰ，Ⅱ，Ⅲ组，其中Ⅱ，Ⅲ组大鼠用链脲佐菌素诱发糖尿病，然后观察枸杞对糖尿病大鼠视网膜组织中剩余抗坏血酸水平，超氧化物歧化酶活性及脂质过氧化物歧化酶含量的短期效应。     

Effects of wild ginseng (Panax ginseng C.A. Meyer) leaves on lipid peroxidation levels and antioxidant enzyme activities in streptozotocin diabetic rats

The aim of this study was to examine the possible antioxidant activities of wild Panax ginseng leaf extract intake in streptozotocin (STZ)-induced diabetic rats (WGLE). Initial blood glucose levels increased abruptly after streptozotocin injection. After 4 weeks of WGLE supplementation, blood glucose levels were lower in animals fed 40 mg/kg (266 mg/dL) and 200 mg/kg (239 mg/dL) than those in no-WGLE fed diabetic rats (464 mg/dL). The concentration of blood TBARS, which are considered the main products of glucose oxidation in blood, was also lowered by WGLE supplementation. These results indicate that WGLE supplementation is involved in suppressing a sudden increase in blood glucose levels and a consequent decrease in TBARS levels in diabetic rats. TBARS levels in the liver, kidney and spleen of WGLE-fed diabetic groups were also significantly lower than in the control diabetic group indicating that oral administration of WGLE effectively suppresses lipid peroxidation that occurs in the organs of diabetic rats. Antioxidant activities of WGLE supplementation further extend in suppressing activities of antioxidant related enzymes, such as glutathione peroxidase (GSH-Px), catalase (CAT) and superoxide dismutase (SOD), in organs of diabetic rats. These results confirm the effectiveness of WGLE supplementation in detoxifying free radicals that are produced excessively in diabetic-induced complications.     

淫羊藿苷对大鼠糖尿病心肌缺血再灌注损伤模型的治疗作用及机制研究

研究淫羊藿苷(icariin)对大鼠糖尿病心肌缺血再灌注损伤(myocardial ischemia-reperfusion injury,MIRI)模型的治疗作用及可能的机制。通过链脲佐菌素(STZ)复制糖尿病大鼠模型,再通过可逆性左冠状动脉前降支结扎法建立心肌缺血再灌注模型,给予大鼠心肌缺血30 min,再灌注120 min。雄性SD大鼠40只,随机分为5组:对照组(NS)、缺血再灌注组(NIR)、糖尿病对照组(MS)、糖尿病缺血再灌注组(MIR)、糖尿病缺血再灌注淫羊藿苷治疗组(MIRI)。观察血糖、体重和生活状态的变化;检测血清中CK-MB,LDH,GSH-Px及心肌中SOD等酶活性及心肌中MDA和NO含量;HE染色观察心肌病理变化;Western blot法检测心肌中Caspase-3,Bcl-2,Bax蛋白表达。结果显示,糖尿病模型复制成功;糖尿病状态下心肌缺血再灌注损伤更加严重;淫羊藿苷可以通过提高NO水平,减少MDA生成,降低CK-MB和LDH活性、升高SOD和GSH-Px活性,减少Caspase-3及Bax蛋白的表达,增加Bcl-2蛋白的表达,改善心肌受损程度。结果表明,淫羊藿苷可能通过对抗氧化应激及抑制细胞凋亡来发挥糖尿病状态下缺血再灌注心肌损伤的保护作用。     

Effects of parsley (Petroselinum crispum) extract versus glibornuride on the liver of streptozotocin-induced diabetic rats

Parsley (Petroselinum crispum) is one of the medicinal herbs used by diabetics in Turkey. The aim of this study is to investigate the effects of parsley (2g/kg) and glibornuride (5mg/kg) on the liver tissue of streptozotocin-induced diabetic rats. Swiss albino rats were divided into six groups: control; control+parsley; control+glibornuride; diabetic; diabetic+parsley; diabetic+glibornuride. Diabetes was induced by intraperitoneal injection of 65 mg/kg streptozotocin (STZ). Parsley extract and glibornuride were given daily to both diabetic and control rats separately, until the end of the experiment, at day 42. The drugs were administered to one diabetic and one control group from days 14 to 42. On day 42, liver tissues were taken from each rat. In STZ-diabetic group, blood glucose levels, serum alkaline phosphatase activity, uric acid, sialic acid, sodium and potassium levels, liver lipid peroxidation (LPO), and non-enzymatic glycosylation (NEG) levels increased, while liver glutathione (GSH) levels and body weight decreased. In the diabetic group given parsley, blood glucose, serum alkaline phosphatase activity, sialic acid, uric acid, potassium and sodium levels, and liver LPO and NEG levels decreased, but GSH levels increased. The diabetic group, given glibornuride, blood glucose, serum alkaline phosphatase activity, serum sialic acid, uric acid, potassium, and liver NEG levels decreased, but liver LPO, GSH, serum sodium levels, and body weight increased. It was concluded that probably, due to its antioxidant property, parsley extract has a protective effect comparable to glibornuride against hepatotoxicity caused by diabetes.     

健脾益气和胃法防治大鼠胃缺血再灌注损伤的实验研究

目的:探讨大鼠胃缺血后再灌注胃粘膜损伤与氧自由基脂质过氧化的相关性及以健脾益气和胃法防治其胃粘膜损伤的细胞保护作用机制。方法:采用腹腔动脉结扎法,造成胃缺血20min,解除结扎,再灌注60min 后,取出胃粘膜,观察正常对照组、病理模型组和用药各组中胃粘膜之氧自由基脂质过氧化物及清除酶系诸指标的变化。结果:大鼠胃缺血后再灌注,胃粘膜脂质过氧化物(LPO)含量比正常对照组明显增加,超氧化物歧化酶(SOD)、非蛋白巯基(NPSH)、谷胱甘肽过氧化物酶(GSH-Px)含量则明显降低(P<0.01);术前口服健脾益气和胃中药各组胃粘膜 LPO 含量明显低于病理组,SOD、NPSH、GSH-Px 水平则明显高于病理组(P<0.05,P<0.01);而过氧化氢酶(CAT)和前列腺素 E_2(PGE_2)在实验各组的比较无统计学意义(P>0.05)。结论:氧自由基脂质过氧化参与胃缺血再灌注的胃粘膜损伤过程,健脾益气和胃法的治疗对胃缺血再灌注损伤具有保护作用。此作用可能是通过抑制氧自由基过氧化损伤,提高胃粘膜 SOD、GSH-Px、NPSH 活性,增强其抗氧化能力而实现的。     

白藜芦醇对妊娠期糖尿病大鼠血糖及氧化应激影响的研究

目的：研究白藜芦醇（Resveratrol）对妊娠期糖尿病大鼠血糖及氧化应激水平的影响。方法：取100只妊娠5天的SD大鼠,通过一次性腹腔注射链脲佐菌素（Streptozotocin,STZ）35 mg?kg^-1制备大鼠糖尿病模型,随机分为6组：妊娠糖尿病模型对照组4组,各组白藜芦醇的注射量分别为30、60、120和240 mg?kg^-1,每组20只;正常妊娠对照组为20只妊娠5天SD大鼠;正常非妊娠对照组为20只非妊娠雌性大鼠。分别检测各组在第0、7、14天的空腹血浆血糖和胰岛素水平;治疗满2周后,检测各组大鼠血清中丙二醛（Malondialdehyde,MDA）、超氧化物歧化酶（Superoxide Dismutase,SOD）、谷胱甘肽过氧化物酶（Glutathione Peroxidase,GSH-Px）、过氧化氢酶（Catalase,CAT）的水平或活性。结果：与正常非妊娠对照组相比,正常妊娠对照组的大鼠空腹血浆血糖和胰岛素水平、血清中MDA 含量和SOD、GSH-Px、CAT活性均无显著性差异（P>0.05）;与妊娠期糖尿病模型组相比,白藜芦醇（30、60、120 和240 mg?kg^-1）治疗组大鼠血清中MDA含量显著降低（P<0.05,P<0.01）;白藜芦醇（120 和240 mg?kg^-1）治疗组大鼠血糖水平显著降低、胰岛素水平显著升高（P<0.05,P<0.01）,大鼠血清中SOD、GSH-Px、CAT活性显著升高（P<0.05,P<0.01）。结论：白藜芦醇对妊娠期糖尿病大鼠有降低血糖、提高抗氧化能力的作用,且具有剂量依赖性,该作用可能与其能够有效提高胰岛素水平和改善抗氧化酶系统的活性有关。     

Antidiabetic and Anti-oxidative Effects of Honokiol on Diabetic Rats Induced by High-fat Diet and Streptozotocin

Objective To study the antidiabetic and anti-oxidative effects of honokiol(Hon)in Magnolia officinalis and its underlying molecular mechanism in diabetic rats induced by high-fat diet(HFD)and streptozotocin(STZ).Methods After ig administration with Hon[25,50,and 100 mg/(kg·d)]to diabetic rats for consecutive 10 weeks,the levels of blood glucose(BG),oral glucose tolerance(OGT),blood lipids including total cholesterol(TC),triglyceride(TG),high density lipoprotein-cholesterol(HDL-C),and low density lipoprotein-cholesterol(LDL-C),hepatic oxidative stress including the activities of superoxide dismutase(SOD),catalase(CAT),glutathione peroxidase(GSH-Px),methane dicarboxylic aldehyde(MDA),and cytochrome P4502E1(CYP2E1)in diabetic rats were measured.Results Compared to the diabetic control rats,ig administration of Hon resulted in significant decrease in BG,TC,TG,and LDL-C levels in serum,as well as hepatic CYP2E1 activity and MDA content in diabetic rats,whereas the level of OGT and activities of hepatic CAT,SOD,and GSH-Px in diabetic rats were significantly increased.Conclusion Hon could alleviate hyperglycemia,hyperlipemia,hepatic oxidative damage,and insulin resistance in diabetic rats by inhibiting hepatic CYP2E1 activity.     

中医药对肺间质纤维化患者抗氧化水平的影响

目的观察自拟保肺化纤丸对肺间质纤维化患者抗氧化水平的影响。方法研究对象选取我院2009年5月-2012年6月收治的肺间质纤维化患者98例,按照随机数字表法随机分为治疗组-9对照组,各49例,分别给予自拟保肺化纤丸（党参、五味子、玉竹、远志等）和N-乙酰半胱氨酸（600mg／次,2次／d）治疗,疗程为3个月,疗程结束时观察血清脂质过氧化物（120）、谷胱甘肽过氧化物酶（GSH．Px）、过氧化氢酶（CAT）等指标变化。结果治疗1个疗程后,治疗组总有效率明显高于对照组（P〈0．05）;治疗组治疗后LPO、GSH—Px、CAT水平较治疗前及对照组改善明显（P〈0．05）,具有统计学意义。结论自拟保肺化纤丸有利于改善肺间质纤维什．点者氢仲．指标、撂高杭氢仲7k平从而耀高临床疗特     

Protective role of extracts of neem seeds in diabetes caused by streptozotocin in rats

Effect of petroleum ether extracts of kernel (NSK) and husk (NSH) of neem (Azadirachta indica A. Juss, Meliaceae) seeds on the prevention of oxidative stress caused by streptozotocin (STZ) was investigated. Diabetes mellitus was induced in adult male Wistar rats after administration of STZ (55 mg/kg b.wt., i.p., tail vein).The effect of NSK (2 gm/kg, b.wt.) and NSH (0.9 gm/kg, b.wt.) orally for 28 days was investigated in diabetic rats. Insulin-treated diabetic rats (6 U/kg, i.p., 28 days.) served as positive control. Diabetic rats given normal saline served as diabetic control. Rats that neither received STZ nor drugs served as normal control. Serum creatine phosphokinase (CPK) increased in diabetic rats was significantly decreased on insulin, NSK, and NSH treatments. The decrease in activities of superoxide dismutase (SOD) and catalase (CAT) and increase in lipid peroxidation (LPO) of erythrocytes as observed in diabetes was regained after insulin, NSH, and NSK treatments. However, there was insignificant improvement in SOD, CAT, and LPO of kidney on NSK and NSH treatment. In spite of increased CAT and SOD activities in liver and heart, LPO was also increased in diabetic rats. Insulin, NSH, and NSK treatments significantly protected animals from cardiac damage but not hepatic. Results suggest that NSH and NSK prevent oxidative stress caused by STZ in heart and erythrocytes. However, no such preventive effect was observed on renal and hepatic toxicity.