局部注射转化生长因子β1质粒与坐骨神经移植后免疫排斥反应的量效关系

背景：研究表明，转化生长因子β1被应用于周围神经移植来抑制或减弱移植排斥反应，但在某些情况下，转化生长因子又表现出正向免疫调节作用。所以有必要进行量效关系研究获取可靠的数据佐证。 目的：从剂量学上观察局部注射转化生长因子β1质粒与免疫排斥反应的量效关系。 设计、时间及地点：随机对照动物实验，于2007—06／2008-04在哈尔滨医科大学动物实验中心完成。 材料：选用雄性Wistar大鼠20只为供体。清洁级雄性SD大鼠50只为受体，随机分为5组，每组10只：自体神经移植组、空质粒异体神经移植组、低、中、高剂量转化生长因子β1质粒异体神经移植组。pAdTrack—CMV—TGF-β1质粒，pAdEasy—1—Bj51833细胞由华中科技大学同济医学院附属协和医院传染病实验室曾令兰教授惠赠。 方法：于手术显微镜下，从犁状肌下孔0．5cm处整齐剪下长约1cm的坐骨神经，将供体神经桥接于神经缺损处，异体神经移植组转化生长因子β1质粒注射剂量为10，20，40μg／只，空质粒异体神经移植组注射空质粒。 主要观察指标：术后6周进行运动神经传导速度、病理学、混合淋巴细胞培养和轴突计数检查。 结果：高剂量转化生长因子β1质粒异体神经移植组运动神经传导速度、轴突计数与自体神经移植组接近（P〉0．05），并优于低剂量转化生长因子β1质粒异体神经移植组（P〈0．05）。病理学及透射电镜显示，高剂量转化生长因子β1质粒异体神经移植组移植神经段效果接近于新鲜自体神经移植组（P〉0．05），并优于低剂量转化生长因子β1质粒异体神经移植组。高剂量转化生长因子β1质粒异体神经移植组混合淋巴细胞培养、迟发性超敏反应优于低剂量转化生长因子β1质粒异体神经移植组（P〈0．05）。 结论：局部注射转化生长因子β1质粒减轻大鼠同种异体坐骨神经移植后免疫排斥反应的作用，在10～40μg范围内，随剂量的增加而增强。     

电针对急性痛风性关节炎大鼠抗炎作用的实验研究

1 实验材料动物:雄性8周龄清洁级Wistar大鼠40只,体重(200±20)g,由哈尔滨医科大学实验动物中心提供[合格证号:SCXK(黑)2006-010].在室温20℃、湿度70%左右的动物房驯养1周.药物试剂:消炎痛,青海大地药业有限公司;TNF-α试剂盒,上海森雄科技实业有限公司.仪器:酶标仪等检测设备由哈尔滨医科大学附属第四医院检验中心提供.     

乳腺癌中的HPV16感染对hTERT蛋白表达的影响

目的为了研究乳腺癌中的HPV16感染对hTERT蛋白表达的影响。方法检测了人乳头状瘤病毒HPV16和人端粒酶逆转录酶（hTERT）在乳腺癌中的表达。应用免疫组化SP法共检测了52例乳腺癌和16例乳腺良性瘤HPV16和hTERT蛋白的表达。结果表明HPV16和hTERT蛋白在乳腺癌组的阳性表达率均显著高于乳腺良性瘤组。统计分析表明,hTERT蛋白表达阳性率与HPV感染率密切相关（P〈0.05）。结论HPV16感染参与了乳腺癌的发生,其致癌机制可能是通过某种途径引起hTERT蛋白表达增加而导致乳腺癌的发生。     

胸腺修饰诱导同种异体静脉移植的免疫耐受研究

Objective To investigate the possibility of inducing immune tolerance to vein trans-plantation in rats by intrathymic injection of allogene. Methods MHC antigen extracted from splenic cells of donor Wistar rats was intrathymically injected to recipients SD rats, and donor Wistar femur vein was transplanted after 2 weeks. Forty-eight SD rats were randomly divided into 4 groups: group A ( femur vein autograft) ,group B ( femur vein allograft) ,group C ( femur vein allograft with use of immunosuppressant), group D (intrathymus injection). Imaging, histology and immunological assays of these groups were carried out 2 weeks after the transplantation. Results Histologic parameters that were tested were better in group D than those in group B. The concentration of serum IFN-γ in group B was significantly higher than that in groups A, C and D [ ( 86. 707±10.928 ) ng/L vs (29.328±4. 170), (69.076±8.059) and (63.355± 4.895) ng/L respectively, P < 0.05 ]. The concentration of serum IL-4 in group B was obviously lower than in groups C and D [ (23.656±3.369) ng/L vs (29.425±4.174) and ( 31.000±4.659) ng/L re-spectively,P < 0.05 ]. Conclusion Intrathymus injection of allogenic antigen might induce specific im-mune tolerance to femur vein transplantation in rats.     

胸腺修饰诱导同种异体静脉移植的免疫耐受研究

目的 观察大鼠胸腺内注射异基因抗原在同种异体异基因股静脉移植免疫耐受中的作用.方法 将48只SD大鼠随机分为4组:自体股静脉移植组(A组)、异体股静脉移植组(B组)、异体股静脉移植免疫抑制剂组(C组)、胸腺内注射供体组织相容性(MHC)抗原后移植组(D组).于2周后进行影像学、组织学、免疫学检测.结果 组织学检测结果显示:D组、C组急性排斥反应损伤较轻,B组血管壁的各层结构破坏最重,可见大量炎性细胞浸润.B组受体大鼠血清干扰素(IFN)-γ浓度为(86.707±10.928)ng/L,显著高于A、C、D组[(29.328±4.170)、(69.076±8.059)、(63.355±4.895)ng/L,P<0.05];B组受体大鼠血清白细胞介素(IL)-4浓度为(23.656±3.369)ng/L,显著低于C、D组[(29.425±4.174)、(31.000±4.659)ng/L,P<0.05].结论 胸腺内注射异基因MHC抗原可诱导大鼠对同种异体血管移植的特异性免疫耐受.     

胸腺修饰诱导同种异体静脉移植的免疫耐受研究

Objective To investigate the possibility of inducing immune tolerance to vein trans-plantation in rats by intrathymic injection of allogene. Methods MHC antigen extracted from splenic cells of donor Wistar rats was intrathymically injected to recipients SD rats, and donor Wistar femur vein was transplanted after 2 weeks. Forty-eight SD rats were randomly divided into 4 groups: group A ( femur vein autograft) ,group B ( femur vein allograft) ,group C ( femur vein allograft with use of immunosuppressant), group D (intrathymus injection). Imaging, histology and immunological assays of these groups were carried out 2 weeks after the transplantation. Results Histologic parameters that were tested were better in group D than those in group B. The concentration of serum IFN-γ in group B was significantly higher than that in groups A, C and D [ ( 86. 707±10.928 ) ng/L vs (29.328±4. 170), (69.076±8.059) and (63.355± 4.895) ng/L respectively, P < 0.05 ]. The concentration of serum IL-4 in group B was obviously lower than in groups C and D [ (23.656±3.369) ng/L vs (29.425±4.174) and ( 31.000±4.659) ng/L re-spectively,P < 0.05 ]. Conclusion Intrathymus injection of allogenic antigen might induce specific im-mune tolerance to femur vein transplantation in rats.     

胸腺修饰诱导同种异体静脉移植的免疫耐受研究

Objective To investigate the possibility of inducing immune tolerance to vein trans-plantation in rats by intrathymic injection of allogene. Methods MHC antigen extracted from splenic cells of donor Wistar rats was intrathymically injected to recipients SD rats, and donor Wistar femur vein was transplanted after 2 weeks. Forty-eight SD rats were randomly divided into 4 groups: group A ( femur vein autograft) ,group B ( femur vein allograft) ,group C ( femur vein allograft with use of immunosuppressant), group D (intrathymus injection). Imaging, histology and immunological assays of these groups were carried out 2 weeks after the transplantation. Results Histologic parameters that were tested were better in group D than those in group B. The concentration of serum IFN-γ in group B was significantly higher than that in groups A, C and D [ ( 86. 707±10.928 ) ng/L vs (29.328±4. 170), (69.076±8.059) and (63.355± 4.895) ng/L respectively, P < 0.05 ]. The concentration of serum IL-4 in group B was obviously lower than in groups C and D [ (23.656±3.369) ng/L vs (29.425±4.174) and ( 31.000±4.659) ng/L re-spectively,P < 0.05 ]. Conclusion Intrathymus injection of allogenic antigen might induce specific im-mune tolerance to femur vein transplantation in rats.     

胸腺修饰诱导同种异体静脉移植的免疫耐受研究

Objective To investigate the possibility of inducing immune tolerance to vein trans-plantation in rats by intrathymic injection of allogene. Methods MHC antigen extracted from splenic cells of donor Wistar rats was intrathymically injected to recipients SD rats, and donor Wistar femur vein was transplanted after 2 weeks. Forty-eight SD rats were randomly divided into 4 groups: group A ( femur vein autograft) ,group B ( femur vein allograft) ,group C ( femur vein allograft with use of immunosuppressant), group D (intrathymus injection). Imaging, histology and immunological assays of these groups were carried out 2 weeks after the transplantation. Results Histologic parameters that were tested were better in group D than those in group B. The concentration of serum IFN-γ in group B was significantly higher than that in groups A, C and D [ ( 86. 707±10.928 ) ng/L vs (29.328±4. 170), (69.076±8.059) and (63.355± 4.895) ng/L respectively, P < 0.05 ]. The concentration of serum IL-4 in group B was obviously lower than in groups C and D [ (23.656±3.369) ng/L vs (29.425±4.174) and ( 31.000±4.659) ng/L re-spectively,P < 0.05 ]. Conclusion Intrathymus injection of allogenic antigen might induce specific im-mune tolerance to femur vein transplantation in rats.     

乳腺浸润性导管癌超声造影与CerbB-2基因表达的相关性分析及临床价值

目的 探讨超声造影与CerbB-2基因表达的相关性,分析其在乳腺良、恶性肿瘤的鉴别诊断及生物学行为的临床价值.方法 回顾性分析49例乳腺浸润性导管癌及44例乳腺纤维瘤患者超声造影特点及免疫组化结果,分析其与CerbB-2基因表达的相关性.结果 49例乳腺癌CerbB-2基因表达阳性率为71.4％,显著高于乳腺纤维腺瘤组18.2％(P＜0.05).CerbB-2(一～+)组超声造影呈等—低增强、均匀增强、边界清晰增强,CerbB2(++～+++)组呈高增强、不均匀增强、边界不清晰增强,两组间比较具正相关性(P＜0.05).结论 超声造影特点与CerbB-2基因表达具有相关性,两者综合评价乳腺肿瘤能为临床早期诊断、治疗方案的选择和预后评估提供重要信息.     

β-联蛋白在结肠癌中的表达及其临床意义

目的探讨β-联蛋白与结肠癌发生、发展以及转移的关系。方法利用组织芯片技术，采用免疫组化（SP）法检测62例结肠癌、18例结肠腺瘤和10例正常结肠组织中口．联蛋白（β-catenin）基因蛋白产物的表达水平。结景结肠癌和结肠腺瘤组织中口．catenin的异常表达率分别为80．6％和83．3％，均显著高于正常组织的表达率0．0％，差异有显著性（P〈0．01）。腺癌组与腺瘤组异常表达率差异无显著性（P〉0．05）。低分化组异常表达率（87．2％）明显高于高分化组（60．0％）（P〈0．05）。淋巴结转移组异常表达率（92．5％）显著高于无淋巴结转移组（59．0％）（P〈0．01）。pcatenin异常表达与肿瘤浸润深度和肿瘤大小无关（P〉0．05）。结论pcatenin的异常表达与结肠癌的分化和转移有关，是肿瘤发生、发展及转移的一个重要因素，可作为结肠癌是否具有恶性潜能的一个重要参考指标。