热放化疗对中晚期大肠癌癌组织中纤维连接素的影响及临床意义

采用免疫组织化学方法证明：纤维连接素（Ｆｎ）在正常大陆组织中呈现规律性分布，大肠癌癌组织中Ｆｎ的含量减少。经热放化治疗的大肠癌病例，Ｆｎ在癌组织中的基膜、癌细胞间的结缔组织、肿瘤血管、肿瘤周围的结缔组织和肌组织中均明显增为；部分病例的肿瘤周围组织中Ｆｎ形成“带状屏障”。这提示癌细胞退变，淋巴细胞、炎细胞浸润及纤维组织增生与Ｆｎ的分布和含量变化有密切关系。     

内毒素性休克时血浆纤维连接蛋白与微血管通透性的关系

用异硫氰酸荧光素右旋糖酐-150作示踪剂,观察内毒素性休克时兔和大鼠微血管通透性变化。结果发现,内毒素性休克兔微血管通透性随休克进展进行性升高,血浆纤维连接蛋白(Fn)含量随之下降,两者呈显著相关(P<0.05)。在内毒素性休克大鼠中补充纯化大鼠Fn后,血浆Fn恢复,在静脉补充后2h内,微血管通透性升高受明显抑制,但2h后作用消失。与对照组(补充缺乏大鼠Fn血浆的内毒素性休克大鼠)相比,治疗组(补充纯化大鼠Fn)内毒素性休克大鼠的存活时间并无明显延长。     

实验性大鼠增生前列腺组织中纤维连接蛋白的表达

目的：研究性激素对大鼠前列腺腹叶（ＲＶＰ）内纤维连接蛋白（ＦＮ）表达的影响。方法：Ｗｉｓｔａｒ雄性大鼠５２只随机分为三组：正常对照组，阉割组和阉割后用不同比例雌二醇（Ｅ２）与睾丸酮（Ｔ）处理组（Ｃ＋Ｅ２／Ｔ组），以免疫组化ＡＢＣ法观察ＲＶＰ内ＦＮ的表达。结果：阉割组ＦＮ表达增强（Ｐ＜００５），Ｃ＋Ｅ２／Ｔ组当Ｅ２／Ｔ＞１：２５０时ＦＮ表达明显增强（Ｐ＜００１）。结论：ＲＶＰ内ＦＮ的表达与Ｅ２和Ｔ的含量及平衡状态密切相关。     

急性局部脑缺血再灌注大鼠外周血糖变化实验观察

目的：探讨急性脑缺血再灌注时大鼠外周血糖的变化。方法：大脑中动脉阻断缺血后，在再灌注３０，６０，１２０ｍｉｎ对外周血糖进行测定。结果：大脑局部缺血再灌注时，血糖明显升高。结论：以上资料表明应注意脑缺血再灌注时的血糖变化。     

The Expression and Change of the β3 Integrin Subunit and Fibronectin in Normal Human Oviductal Tissue and Tubal Ectopic Pregnant Tissue

Objective To investigate the expression and change of the B3 integrin subunit and fibronectin in normal human oviductal t‘issue during various phases of the menstrual cycle and tubal ectopic pregnant tissue Methods Samples of normal ( n=29 ) and pregnant fallopian tube ( n=22 ) tissues were obtained from women who had normal cycle and history of normal pregnancy. Normal oviductal tissue samples were divided into 4 groups based on their menstrual cycle. Both expression and distribution of the B3 subunit and fibronectin were determined with the immunohistochemical method and the image analysis. Results The B3 subunit was expressed in the cytoplasm of ciliated cells. The expression level of the B3 subunit was higher after ovulation than that before ovulation in isthmus epithelium (P ＜0.001), and declined significantly after ovulation in ampullae epithelium (P ＜0.001). In umbrella epithelium within 4 days after ovulation, the expression level of the B3 subunit was observed at rather higher level among other phases (P ＜0.001). The ciliated and secretory cells of the epithelium except for where the pregnancy occurred in tubal pregnancy expressed the subunit, and no significant relationship was found between the normal tubal tissue of the secretory phase and tubal ectopic pregnant tissue (P＞0.05). Fibronectin was expressed in the basementmembrane of human oviductal epithelium and matrix. The expression level of fibronectin was higher in the hyperplastic phase than that in the secretory one (P＜0.001). And it was lower in normal tubal tissue of the secretory, phase than that in tubal ectopic pregnant tissue (P ＜0.001). Conclusion The B3 integrin subunit was expressed in the ciliated cells of human oviductal epithelium, and fibronectin was expressed in the basement membrane of human oviductal epithelium and matrix. Their expression and change in oviductal tissue is based on different phases of menstrual cycle. The B3 subunit could not related to the occurrence of tubal ectopic pregnancy. Fibronectin could be the potential molecular basis for the tubal ectopic pregnancy.     

败血症大鼠肺纤维连接蛋白含量与分布的变化

作者对25只盲肠结扎后败血症大鼠体内的纤维连接蛋白(Fn)进行了研究。血浆Fn(pFn)用免疫火箭电泳法,组织中(肝、肺)可浸出的Fn含量用ELISA和Fn在肺中的定位分布用间接免疫荧光法检测。结果发现,盲肠结扎后22h肝中Fn含量明显减少(P<0.05),肺组织中Fn含量与炎症轻重有关,炎症轻微处Fn含量比正常及假手术对照明显减少(P<0.05),炎症严重处Fn明显增加(P<0.05)。但此时pFn增高。肺中的Fn抗原主要集中在微血管周围,其分布与嗜中性白细胞的浸润一致。作者认为,上述变化与败血症时肺功能衰竭的发生有一定关系。     

定量聚合酶链式反应技术检测骨关节炎软骨组织中纤维连接蛋白mRNA的表达水平

目的:探讨纤维连接蛋白(FN)mRNA表达水平的变化与骨关节炎的关系.方法:采用石膏管型固定右膝关节,人工制作骨关节炎动物模型作为实验组,另设对照组,采用定量聚合酶链式反应方法检测FN mRNA表达水平的变化.结果:Wistar鼠正常膝关节的软骨组织与人工制造膝关节骨关节炎的软骨组织中均存在FN mRNA表达,但其表达水平在骨关节炎的软骨组织中显著低于正常膝关节的软骨组织(P＜0.01).结论:软骨组织中FA mRNA表达水平降低可能是骨关节炎发生和难以愈合的原因之一.     

慢性阻塞性肺病患者血浆纤维结合素变化的临床意义

检测84例老年慢性阻塞性肺病或肺心病患者及41例健康老年人的血浆纤维结合素,表明老年慢性阻塞性肺病患者的血浆纤维结台索显著降低,与病情程度相平行。血浆纤维结台素水平在一定程度上可反映肺心病患者呼吸的代偿情况,配台血气分析,可作为动态预测呼吸衰竭的发生和恢复的参考指标之一。     

Expressions of β_3 Integrin and Fibronectin in Salpingitis

Objective To investigate the association between β3 integrin-fibronectin signaling and salpingitis. Methods Thirteen chronically inflamed tubal samples were included in the case group, while 29 normal fallopian tube samples were set as the controls. Immunohistochemistry was used to determine the distribution patterns and expressions of β3 integrin and fibronectin in the fallopian tube samples. Results β3 integrin was presented in the ciliated cells within the whole length of the normal fallopian tube, but no staining was detected in the tubal epithelium of salpingitis. A similar distribution pattern of fibronectin was revealed between the cases and the controls, with exclusive staining in the tubal mucosal matrix and the basement membranes of the tubal epithelium and mucosal vessels, whereas no staining was detected in the tubal epithelial cells. Fibronectin in the samples of salpingitis showed a remarkably stronger-staining than that of the normal controls (P<0.01). Conclusion Salpingitis could reduce β3 integrin expression and raise fibronectin expression in the fallopian tube epithelium, concomitantly changed concentrations of β3 integrin and fibronectin seem to have impacts on the onset of salpingitis.     

喉癌的浸润转移与纤维结合蛋白含量表达的相关性研究

目的：探讨喉癌浸润转移与纤维结合蛋白（Fibronectin，FN）的关系。方法：采用琼脂糖单向扩散和免疫酶染色（ABC法）检测喉癌病人血清及喉疾组织中FN的含量及表达。结果：喉疾病人血清中FN含量明显低于对照组，P＜0．01，喉癌组织中FN表达于细胞基质中，少部分表达于细胞膜上。结论：喉癌病人血清及组织中FN含量和表达下降与喉癌转移有关。     

Expressions of Integrin and Fibronectin in Salpingitis

Objective To investigate the association between β3 integrin-fibronectin signaling and salpingitis.Methods Thirteen chronically inflamed tubal samples were included in the case group,while 29 normal fa...     

Protective Effects for Hepalocytes of Salviae miltiorrhiza and Paeonia Iactiflora in Experimental Liver Damage

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纤维连接蛋白在肾脏疾病中变化的意义

测２０例尿毒症患者血浆纤维连接蛋白含量，证实尿毒症者血浆Ｆｎ降低，并与患者中性粒细胞吞噬功能低下有关联。体外实验证实Ｆｎ有促进ＰＭＮ吞噬功能作用，且与其浓度正相关。表明血浆Ｆｎ与机体免疫防御功能关系密切，其水平可反映患者细胞吞噬功能状态。     

免疫组化PAP法观察人体损伤组织中Fn的研究

本文采用石蜡切片，免疫组化PAP（酶抗酶复合物），DAB（3，3’－二氨基联苯二胺）显色，观察人头皮枪弹创（即刻）、头皮挫裂创（30min）、腹部皮肤切创（4h）三类创伤各4例创缘区Fn含量及分布的变化。可见三者除具备正常皮肤的Fn含量与分布外，创缘组织中均有大量棕色、絮状Fn渗出聚积，着色由浅到深向创缘处逐渐增加形成梯度，与死后皮肤损伤创缘Fn染色呈阴性，正常皮肤中Fn含量及分布比较，有明显区别，并能反映创缘区Fn含量及分布的规律。应用于法医学创伤领域的研究，不失为行之有效的技术方法。     

人血浆纤维连接素的提纯及其抗血清制备

本文报道了用明胶-cNBr-Sepharose4B亲和层析法与Sephadex G200滤过层析法相结合提取人血浆Fn,操作简便,抗原纯度高。采用微量多点注射免疫新西兰大白兔,制备了兔抗人血浆Fn抗血清,能与人Fn抗原呈特异性反应,也能与其它动物的Fn抗原呈交叉反应,可用于测定血浆中Fn含量和免疫组织化学研究。     

苦瓜总皂苷对2型糖尿病肾病大鼠肾脏细胞间纤连蛋白和胶原Ⅳ蛋白表达的影响

目的：探讨苦瓜总皂苷对2型糖尿病肾病大鼠细胞间纤连蛋白（ FN）和胶原Ⅳ蛋白（Ⅳ-CP）表达的影响。方法雄性SD大鼠48只随机分为正常对照组、2型糖尿病肾病模型组及苦瓜总皂苷5 mg/（ kg·d）,治疗组左肾切除加1次大剂量链脲佐菌素腹腔注射建立动物模型,正常对照组和模型组给予生理盐水灌胃,苦瓜总皂苷治疗组给予苦瓜总皂苷灌胃,分别于实验第4、8周处死大鼠各半,测血糖、24 h尿蛋白定量以及炎性因子;免疫组化、RT-PCR以及Western Blot检测FN和Ⅳ-CP蛋白的表达。结果治疗组尿蛋白和血清肌酐与模型组相比明显减少,血糖明显升高（ P﹤0.05）;免疫组化、RT-PCR和Western Blot与模型组相比治疗组大鼠肾脏组织FN和Ⅳ-CP表达明显降低（ P﹤0.05）。结论苦瓜总皂苷可以通过抑制糖尿病肾病大鼠肾组织细胞间纤连蛋白和Ⅳ型胶原的表达,改善肾功能。     

Purification of Fibronectin in Human Plasma and the Preparation of Its Antiserum

The techniquc of purification of plasma fibroncctin and preparation of its antiserum is re-ported in this paper.Blood plasma was passed through an affinity column of gclatin-Sepharose 4B,fol-lowed by passing throughia column of Scphadex G200.Fibronectin with high purity was obtained.The prepare fibronectin serum.It was found that there were not only specific immune reactions be-tween the anti-human fibronectin serum and hyman fibronectins,but also cross reactions between theanti-serum and the fibronectin from other animals.The serum can be used for the study ofimmunohistochernistry of the fibronectin.     

The Role of Fibronectin in Arterial Subendothelium in Platelet Adhesion

The role of fibronectin in vascular subendothelium in platelet adhesion after the removal ofthe endothelium of aorta was studied in normal rabbits. The thoracic aortae were treated with 1%Nonidet P-40 for 5 min and with 0. 3 mol/L KCl for 10 min. The whole endothelium was re-moved and a large amount of fibronectin in the subendothelium was exposed. Autogenous platelet-rich plasma was isolated and platelets were labeled with 1:1000 acridine orange. The adheredplatelets were washed away with 2% SDS solution. Finally, the intensity of fluorescence of the wash-ing fluid was measured with a spectrofluorophotometer. The animals were divided into 4 groups:(1) normal endothelium group. (2) lysed endothelium group, (3) lysed endothelium and guineapig anti-rabbit fibronectin antisera inhibition group, (4) lysed endothelium and guinea pig normalsera control group. The adhesion of platelets in the 2nd group was taken as 100%. The resultsshowed that after the treatment of anti-rabbit fibronectin antisera the platelet adhesion onsubendothelium was inhibited up to 70. 1%. It is suggested that the fibronectin in subendotheliumplays an important role in platelet adhesion.     

玉肾汤对IgA肾病大鼠的实验研究

目的:研究玉肾汤治疗IgA肾病的作用机理。方法:56只大鼠随机分为对照组、模型组、保肾康组、玉肾汤组,保肾康组予保肾康药片,玉肾汤组以中药玉肾汤水煎剂,其余两组予等量生理盐水灌服。观察各组尿蛋白定量、尿红细胞计数、血清肌酐、血尿素氮的检测结果;用免疫荧光法检测IgA免疫复合物及免疫组化法检测纤维连接蛋白(FN)在肾组织中的沉积及病理组织学改变。结果:玉肾汤组尿蛋白定量显著下降,与模型组比较有显著差异(P<0.05)。各用药组对尿红细胞数影响无显著性差异(P>0.05),玉肾汤组能降低IgA肾病大鼠血肌酐、血尿素氮水平,与模型组比较,有显著性差异(P<0.05)。对照组无IgA沉积,FN无异常变化,两治疗组IgA与纤维连接蛋白的沉积较模型组明显降低(P<0.01)。两治疗组间比较无显著性差异。结论:玉肾汤能够减轻免疫复合物及纤维连结蛋白在肾组织中的沉积,从而阻止肾组织硬化。