大鼠腹部开放伤合并海水浸泡后内毒素、TNF-α、IL-6、IL-8的变化

目的：观察大鼠腹部开放伤合并海水浸泡后不同时段血浆内毒素（LPS）、肿瘤坏死因子-α（TNF-α）、IL-6和IL-8的变化。方法：成年健康Wistar大鼠116只,随机分为2组,其中腹部开放伤合并海水浸泡组96只,腹部开放伤对照组20只。应用微生物快速检测仪和γ测量仪检测大鼠腹部开放伤合并海水浸泡后0.5,1,2,3和4h血浆LPS、TNF-α、IL-6和IL-8水平。结果：腹部开放伤合并海水浸泡2～4h后,血浆中LPS水平明显上升,与对照组比较具有显著性差异。海水浸泡4h后血浆中TNF-α浓度上升明显,具有显著性差异。海水浸泡3～4h后血浆中IL-6浓度明显升高,具有显著性差异。海水浸泡后不同时间血浆中IL-8浓度与对照组比较无明显变化。结论：血浆中LPS、TNF-α和IL-6浓度明显升高与损伤关系密切,是引发中毒性休克导致机体死亡的主要原因之一。     

胃癌癌前病变细胞动力学研究

应用自显像技术对内镜活检胃肠化生和异型增生上皮进行~3H-TdR 标志,观察标记率及增殖带的变化。异型增生标记率(18.50～19.21)及大肠化生标记率(18.57)较高,与胃癌(19.32)相似,并且其增殖带向粘膜表面及深部移动。这种细胞动力学的变化可能是胃癌癌前病变的基础。     

异基因骨髓移植术后1例尸检报告

急性白血病患者进行异基因骨髓移植术治疗发展较快,移植后合并粟粒性绪核的病例实属罕见,现报告1例。病历摘要患者男性,36岁,籍贯北京。于1986年10月27日心慌、气短、下肢浮肿急诊入院。患者于1985年1月确诊为急性早幼粒细胞白血病,4月7日行异基因骨髓移植,骨髓供应者为患者胞姐。供受体之间 HLA、ABC DR 位点相同,MLC 无反应。移植后病程顺利,8月10日因高热1周伴咳嗽再次入院。     

兔烧伤合并海水浸泡血流动力学变化

目的 建立兔烧伤合并海水浸泡的实验模型，观察实验动物血液动力学变化。方法 实验动物烧伤后随机分为单纯烧伤组（B组,n=6）和烧伤合并海水浸泡组（B＋I组，n=12)。烧伤合并海水浸泡组烧伤后置于人工配制的海水中，监测血液动力学指标变化，直至动物死亡。单纯烧伤组置于干燥处同时监测相同指标。结果 烧伤合并海水浸泡组血液动力学指标紊乱明显重于单纯烧伤组，死亡率明显高于单纯烧伤组，平均存活时间为6.9h。有严重的体温过低。结论 烧伤合并海水浸泡可引起机体的严重的病理生理变化，血液动力学变化明显重于单纯烧伤组，表明海水浸泡使烧伤休克加重，导致实验动物存活时间显著缩短。     

胰岛内分泌肿瘤中α-HCG蛋白及mRNA表达的研究──应用免疫组化及原位PCR技术对52例的观察

应用免疫组化对52例胰岛内分泌肿瘤（PET）α－HCG蛋白表达进行观察；并用原位PCR技术中对其α-HCGmRNA的表达进行观察。结果发现α-HCG在各类正常胰岛细胞中未见蛋白及基因的阳性表达。在良性及恶性PET中α-HCG蛋白检出率分别为17．9％（5／28）及58．3％（14／24）。在α－HCG抗原阳性的PET中应用原位PCR技术均可见有α－HCGmRNA的表达。说明该类肿瘤细胞具有合成α-HCG的能力。对α－HCG在PET中表达的临床病理意义进行了研讨。     

大肠腺瘤及大肠癌细胞动力学的免疫组织化学观察

收集的活检标木包括:正常大肠粘膜5例、大肠腺瘤18例、大肠癌8例,应用体外组织培养技术掺入5-溴脱氧尿核甙(BrdUrd),并以Brd Urd单克隆抗体免疫组织化学方法检测具有分裂能力的阳性细胞,计算标记指数(LI),观察细胞增殖带范围。结果发现:大肠腺瘤及大肠癌的LI明显高于正常粘膜(P<0.001)°腺瘤伴不同程度异型增生的LI也不同,中、重度异型增生高于轻度异型增生腺瘤(P<0.05),而与腺癌无明显差异。正常粘膜增殖带局限于隐窝下半部,而腺瘤及大肠癌的具有分裂能力的细胞则散布整个肿瘤细胞区域。这一结果证实从异型增生发展到癌的组织发生过程。     

THE ENDOCRINE CELLS OF EXTRATUMORAL MUCOSA IN RELATION TO THE CARCINOMA IN STOMACH

One hundred and sixty-one surgically resected gastric carcinomas and 5 stomachs obtained at necropsy were evaluated using anti chromogranin A (CgA). CgA-Positive cells were found in 55 of 161 gastric carcinoma. Endocrine cells (EC) of the 55 cases of rumors and extratumoral mucosa and 5 normal gastric mucosa were distinguished by immunoreastive gastrin (CAST), somatostatin (SS), serotonin (SERO), calcitonin (CT), ACTH, human chorionic gonadotropin (HCG) , glucagon (GLU) , pancreatic polypeptide (PP), bombesin (BOM). Each type EC in extratumoral mucosa was quantitated by Image analyser. TWO variants of changes of EC were identified on the basis of presence or absence of associated antral atrophy. In the group of antral atrophy, amount of G cells decreases than normal control (58. 7mm2, P<0. 001); D cells and BOM-positive cell also decrease; GLU-positive cells distributing in glands of intestinal metaplasia increase (18. 6/mm2, P<0. 001) in antral mucosa. There is not obvious change in the average thickne     

Effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαof small intestine in rats

Objective To observe effects of seawater immersion combined with open abdominal injury on the expression of NF-κB,and IκBαas well as the change pattern in rats. Methods Ninety-one Wistar rats were randomly divided into 3 groups: the control group (n =7), the open abdominal injury group(n =42) and open abdominal injury combined with 1-hour seawater immersion group ( n =42). The expression of NF-κB,andIκBαin small intestine tissues was measured by Western blot and statistical analyses were also made in the study. Results The expression of NF-κB,in the seawater immersion combined with open abdominal injury group increased significantly 3 hours after injury, when compared with that of the open abdominal injury group(P<0. 05), whereas the expression of NF-κB, of the pure injury group was slightly lower than that of the control group, but no statistical differences could be seen between them(P>0.05). The change pattern in the expression of IκBαwas quite the opposite to that of NF-κB. Conclusions NF-κB seemed to be rapidly and persistently involved in the whole inflammatory response to trauma induced by opened abdominal injury and seawater immersion, when a comparison was made with the pure open abdominal injury group. Injuries for the rats in the open abdominal injury combined with seawater immersion group were serious, and the feedback mechanism for NF-κB was not established for quite a long time.