大黄蠊虫丸对动脉粥样硬化模型大鼠胰岛素样生长因子表达的影响

目的观察大黄蠊虫丸对胰岛素样生长因子（IGF-1）在动脉粥样硬化（As）模型大鼠中表达的影响,并从中探讨大黄蠊虫丸抗As的机制。方法sD雄性大鼠体重220～300g,随机分为4组,对照组、模型组、大黄蠊虫丸组高剂量、低剂量组,每组8只,共32只。用高脂饲料喂养并建立大鼠As模型,用大黄蠊虫丸灌胃12W后,观察各组大鼠血清血脂（TG,TC,HDL-C,LDL-C）,丙二醛（MDA）,超氧化物歧化酶（SOD）,IGF-1含量的变化。结果模型组IGF-1含量显著降低,与对照组比较有显著差异（P〈0.05）;大黄蠊虫丸组较模型组血清IGF-1含量明显升高（P〈0．05）。结论大黄蠊虫丸通过提高血清IGF-1表达,抑制血管平滑肌细胞的凋亡,发挥抗AS的作用。     

大黄蜇虫丸对动脉粥样硬化大鼠核因子-κB蛋白表达的影响

目的观察NF-κB在动脉粥样硬化(AS)模型中的表达,并从中探讨大黄蜇虫丸抗AS的机制。方法用高脂饲料喂养并建立大鼠AS模型,用大黄蜇虫丸喂饲12w后,检测血脂、超氧化物歧化酶(SOD)、丙二醛(MDA)、肿瘤坏死因子(TNF)-α,并留取主动脉标本,观察组织形态学变化,采用免疫组化法观察NF-κB蛋白表达。结果大黄蜇虫丸组与模型组相比血管壁NF-κB蛋白表达明显减弱(P<0.01)。结论大黄蜇虫丸通过抑制NF-κB活性,下调多种靶基因的表达,进而减轻血管壁炎症反应,抑制血管平滑肌细胞的增殖与迁徙,发挥抗AS的作用。     

大黄蛰虫丸对动脉粥样硬化模型大鼠内皮功能的影响

目的 观察大黄蛰虫丸对血脂、内皮素、内皮舒张因子在动脉粥样硬化(AS)模型大鼠中表达的影响.方法 SD雄性大鼠体重220～300 g,随机分为5组,对照组、模型组、大黄蛰虫丸高剂量组、低剂量组,阳性药组,每组8只,共40只.用高脂饲料喂养,建立大鼠AS模型,用大黄蛰虫丸灌胃12 w后,观察各组大鼠血清血脂,内皮素(ET),一氧化氮(NO) 含量的变化.结果 模型组ET含量显著升高,NO含量显著降低,与对照组比较有显著差异(P<0.05),大黄蛰虫丸组较模型组血清ET含量明显降低,NO含量显著升高(P<0.05).结论 大黄蛰虫丸通过降低血清ET含量,升高血清NO,保护内皮功能,发挥抗AS的作用.     

胰岛素样生长因子-1对兔动脉粥样硬化血管平滑肌细胞凋亡的影响

目的探讨胰岛素样生长因子-1（IGF-1）对兔动脉粥样硬化血管壁平滑肌细胞（VSMC）凋亡的影响。方法将24只大白兔随机分为正常组、模型组、IGF-1组及阳性对照（辛伐他汀）组。通过高脂饲料喂养及腹主动脉球囊拉伤建立兔动脉粥样硬化模型,12周后腹腔静脉取血并检测血脂,取腹主动脉并用Tunel法检测血管壁平滑肌凋亡细胞。结果与正常组相比,模型组血脂水平显著升高（P〈0.05）;与模型组相比,辛伐他汀组血脂水平显著降低（P〈0.05）;与模型组相比,IGF-1组Tunel阳性细胞数明显减少、辛伐他汀组Tunel阳性细胞数明显增加（P均〈0.05）。结论 IGF-1对动脉粥样硬化有一定的防治作用,并能在动脉粥样硬化形成晚期维持斑块稳定性,其机制可能与减少血管平滑肌细胞凋亡有关。     

原位杂交检测胰岛素样生长因子—1受体基因在动脉粥样硬化组织？…

为观察胰岛素样生长因子－１受体基因在动脉粥样硬化组织中的表达及分布，建立实验性动脉粥样硬化家兔模型。采用人胰岛素样生长因子－１受体ｃＲＮＡ探针进行组织原位杂交。结果发现，正常对照的家兔主动脉组织，仅在外膜显示有胰岛素样生长因子－１受体ｍＲＮＡ的阳性表达。中膜及内膜均呈阴性；实验组主动脉的整个血管壁，包括外膜，中膜，新生内膜及动脉粥样硬化斑块组织均有胰岛素样生长因子－１受体基因的表达。研究提示，增殖     

肺癌患者胰岛素样生长因子1和胰岛素样生长因子结合蛋白3的表达及其临床意义

目的 分析肺癌患者血清和支气管肺泡灌洗液（BALF）中胰岛素样生长因子1（IGF-1）、胰岛素样生长因子结合蛋白3（IGFBP-3）的表达,探讨其在肺癌诊断和预后中的临床意义.方法 运用免疫放射法检测80例非小细胞肺癌患者和14名健康者（对照组）外周血血清与BALF中IGF-1、IGFBP-3的水平.结果 肺癌组血清和BALF中IGF-1表达显著高于对照组（P＜0.01）,IGFBP-3的表达显著低于对照组（P＜0.05）,同时IGF-1/IGFBP-3升高（P＜0.01）.IGF-1、IGF-1/IGFBP-3在有淋巴结转移、远处转移和TNMⅢ～Ⅳ的肺癌患者血清、BALF中明显高于无转移者和TNMⅠ～Ⅱ期者（P＜0.05）,而IGFBP3下降明显高于无转移者及TNMⅠ～Ⅱ期者（P＜0.05）.肺癌组血清IGF-1、IGFBP-3浓度与BALF中的浓度呈正相关（P ＜0.01）;患者血清BALF中IGF-1与IGFBP-3浓度呈负相关（P＜0.05）.结论 非小细胞肺癌患者血清和支气管肺泡灌洗液中IGF-1、IGFBP-3的表达对肺癌的诊断、判断预后有重要临床意义.     

大黄虫丸抗肿瘤作用研究进展

正经典名方大黄虫丸出自汉代张仲景的《金匮要略·血痹虚劳病脉证并治第六》:五劳虚极羸瘦,腹满不能饮食,食伤、忧伤、饮伤、房室伤、饥伤、劳伤,经络营卫气伤,内有干血,肌肤甲错,两目黯黑。缓中补虚,大黄虫丸主之。大黄虫丸由大黄、黄芩、甘草、桃仁、杏仁、芍药、干地黄、干漆、虻虫、水蛭、蛴螬、虫共十二味中药组成,组方精良,用药精妙,具有通经活络、祛瘀生新、缓中补虚之功效。恶性肿瘤病至晚期,     

大黄Zhe虫丸抗大鼠免疫性肝纤维化研究

目的：研究大黄Ｚｈｅ虫丸预防和治疗肝纤维化的作用。方法：运用牛血清白蛋白致大鼠免疫损伤性肝纤维化模型，观察大Ｚｈｅ黄虫丸对肝组织病理学、肝组织羟脯氨酸（ＨｙＰ）和血清透明质酸（ＨＡ）及肝功能的影响，并设秋水仙碱作对照。结果：大黄Ｚｈｅ虫丸预防和治疗组肝纤维化率分别为７２．７％和７１．４％，而模型组和秋水仙碱组肝纤维化率为９２．３－１００％，尤其是大黄Ｚｈｅ虫丸治疗试验组肝ＨｙＰ含量下降最显著，与模     

复元胶囊对兔膝骨关节炎软骨中胰岛素样生长因子-I及胰岛素样生长因子结合蛋白3表达的影响

目的 观察复元胶囊对兔膝骨关节炎软骨中胰岛素样生长因子-I (IGF-I)、胰岛素样生长因子结合蛋白3(IGFBP3)表达的影响.方法 采用右后肢伸直石膏固定法造模,将44只雌雄各半新西兰大白兔随机分为正常组、模型组、盐酸氨基葡萄糖组、复元胶囊低、中、高剂量组.正常组4只,其余各组8只.各药物组每天灌胃1次,持续6 w.免疫组织化学法检测IGF-I、IGFBP3表达.结果 模型组IGF-I、IGFBP3表达积分明显高于正常组(P<0.01);复元胶囊各剂量组与模型组比较,IGF-I表达积分不同程度升高(P<0.05),而IGFBP3表达积分不同程度降低(P<0.01),高剂量组显著.结论 复元胶囊具有防治膝骨关节炎作用,其机制可能与调节IGF-I、IGFBP3表达水平有关.     

碘缺乏对大鼠胰岛素样生长因子1基因表达的影响

目的：建立一种对胰岛素样生长因子Ⅰ（IGF-Ⅰ）基因mRNA进行定量检测的竞争PCR方法，对碘缺乏状态下IGF－1基因的表达水平进行检测。方法：以自行建立的竞争性PCR方法对低碘及正常大鼠肝脏中IGF－1基因mRNA的水平进行定量检测，结果，低碘大鼠肝脏中IGF－1基因mRNA的浓度（71.3nmol/L）较正常组146.4nmol/L）明显减低。结论：碘缺乏导致骨，脑发育障碍的部分原因可能是因为降低IGF－1这一发育调节因子的基因表达。     

急性冠状动脉综合征患者胰岛素样生长因子-Ⅰ的变化

目的:研究胰岛素样生长因子-Ⅰ(IGF-Ⅰ)与动脉粥样硬化(AS)斑块的相关关系,探讨其在急性冠状动脉综合征(ACS)患者中的可能作用。方法:使用酶联免疫吸附法(ELISA)分别测定77例ACS患者(40例急性心肌梗死、37例不稳定型心绞痛)、38例稳定型心绞痛(SAP)及33例非冠心病对照组血中游离的及总的IGFⅠ水平。结果:游离的IGFⅠ水平在ACS患者明显高于SAP患者(P<0.05);而在冠心病患者的亚组总的IGF-Ⅰ水平明显低于非冠心病患者(P<0.05),而在冠心病各亚组之间差异无统计学意义(P>0.05);游离的IGF-Ⅰ水平与冠状动脉病变支数及Gensini评分均无明显的相关性(P>0.05),总的IGF-Ⅰ水平与Gensini评分存在明显的负相关(P<0.01)。结论:血中总的IGF-Ⅰ水平降低与AS斑块的稳定性状态无关,不能作为ACS的判断指标;而游离的IGF-Ⅰ水平升高反映冠状动脉病变的活动程度,参与了促使AS斑块从稳定到不稳定的发展过程。     

Functional insulin-like growth factor-1/insulin-like growth factor-1 receptor-mediated circuit in human and murine thymic epithelial cells

Interactions between thymocytes and thymic epithelial cell (TEC) can be modulated by growth hormone via insulin-like growth factor-1 (IGF-1). In this study, we showed IGF-1 and IGF-1 receptor mRNA expression by human and murine TEC and thymocytes. Functionally, IGF-1 stimulates extracellular matrix production by human TEC. Moreover, pretreatment of murine TEC with IGF-1 increases their adhesion to thymocytes. Interestingly, we observed an increase in the frequency of CD4-CD8-CD90+ T cells which adhered to pretreated TEC, supporting the concept that IGF-1 may also act indirectly on intrathymic T cell differentiation and migration through the thymic epithelium.     

Genetic selection for insulin-like growth factor-1 in growing mice is associated with altered growth

Substantial responses in the 6-week and mature body-weights of mice occurred after 7 generations of selection for or against plasma levels of Insulin-like Growth Factor-1 (IGF-1). Plasma levels of IGF-1 were also significantly different after 7 generations of selection (high line = 85 +/- 2 ng/ml, low line = 58 +/- 2 ng/ml). The average 6-week weight in the line selected for high plasma IGF-1 was 22.5 +/- .2 g compared with 18.5 +/- .2 g in the low plasma IGF-1 line, after 7 generations of selection. The difference between lines was maintained at 20 weeks of age. These data provide further evidence for the roles of IGF-1 in the regulation of somatic growth and as a mediator of a genetic component of growth.     

围绝经期妇女血清瘦素水平

瘦素是由脂肪细胞分泌的一种蛋白质类激素 ,它由肥胖(ｏｂ)基因编码 ,能通过调节食欲和能量消耗而控制体重〔1〕。围绝经期妇女体内常见内分泌紊乱 ,并出现身体超重等现象。因此 ,研究围绝经期妇女血清瘦素水平的变异 ,无疑有其特定的重要意义。一、对象和方法1.对象 :女性 ,排除心、肺、肝、肾等疾病。围绝经组 41例 ,平均年龄 47.5岁 ;对照组为育龄期妇女 ,46例 ,平均年龄2 6 .9岁。按体重指数 (ＢＭＩ)划分 ,围绝经期分为肥胖组 2 8例(ＢＭＩ≥ 2 5ｋｇ/ｍ2 ) ,非肥胖组 13例 (ＢＭＩ <2 5ｋｇ/ｍ2 ) ;育龄期妇女分为肥胖组 11例 (ＢＭＩ…     

Decreased expression of insulin-like growth factor-1 and apoptosis of vascular smooth muscle cells in human atherosclerotic plaque

Insulin-like growth factor-1 (IGF-1) plays an important role in migration, cell cycle progression and survival of vascular smooth muscle cells (VSMC). We investigated the specific localization of IGF-1 and its receptor (IGF-1R) and their association with apoptosis and the expression of apoptosis-related proteins in early and advanced atherosclerotic lesions. Human atherosclerotic plaques (n=23) from patients undergoing aortic, carotid or femoral arterial surgery were studied. Immunohistochemistry and in situ hybridization revealed significantly higher expression of IGF-1 and IGF-1R in the media than in the intima of early atherosclerotic lesions (P<0.01). Medial VSMC positive for BAX, a proapoptotic protein of the B-cell CLL/lymphoma 2 (BCL2) family, showed colocalization of IGF-1. Apoptosis, as detected by DNA in situ terminal deoxynucleotidyl transferase end labeling (TUNEL), was not present in these early lesions. In advanced atherosclerotic plaques, the expression of IGF-1 and IGF-1R was significantly lower in the intimal regions with macrophage infiltration than in those without macrophage infiltration or than in the media (P<0.01). Furthermore, IGF-1 and IGF-1R immunoreactivity was markedly lower in intimal TUNEL-positive VSMC compared with intimal BAX-positive and medial VSMC (P<0.01). We conclude that IGF-1 and IGF-1R expression are reduced in the deep intima of early atherosclerotic lesions and in areas of advanced plaques with macrophage infiltration. Since IGF-1 is a potent survival factor for VSMC, poor expression of IGF-1 and IGF-1R in intimal regions with macrophage infiltration would likely contribute to triggering VSMC apoptosis potentially leading to plaque weakening, plaque rupture and acute coronary events.