Preliminary study on immunotoxin for the prevention of Schistosomiasis japonica

To investigate the effects of immunotoxin (bio-missile) on the prevention of schistosomiasis. The monoclonal antibody NP11-4, located in out-layer membrane of adult worm, membrane of cercariae, membrane of schistosomula, shell of egg and membrane of miracidium in egg, was combined with artesunate (produced by Guilin Pharmaceutical Factory of China) by chemical method to fabricate immunotoxin.     

Effects of prolactin on HLA- DR and CD40 expressions by human thyrocytes

Objective To study the effects of prolactin (PRL) on HLA- DR and CD40 expressions by human thyrocytes, and to investigate the possible mechanisms for PRL to affect the de velopment of Graves’ disease (GD). Methods Thyrocytes in secondary culture, which were from GD thyroid glands and the tissu es adjacent to the lesions of multinodular goiter and adenoma (control group), w ere treated respectively with ovine PRL (oPRL), interferon- γ (IFN- γ), interl ukin- 4 (IL- 4) and oPRL plus IFN- γ (10 U/ml) or IL- 4 (5 ng/ml) for 7 days . HLA- DR and CD40 expressions on the thyrocytes were determined by immunofluor escent staining and flow cytometry. Results oPRL (12. 5 ng/ml-1000 ng/ml) had no significant direct effect on HLA- DR or C D40 expression. It did not significantly affect the stimulation of HLA- DR exp ressions on the two groups of thyrocyte treated with IFN- γ or on GD thyrocytes treated with IL- 4. oPRL could antagonize the stimulation of CD40 expressions by IFN- γ and the inhibition by IL- 4 on both groups of thyrocytes. The antago nizing effects were related to the concentrations of PRL. IFN- γ- stimulated p ercentages of CD40［+］ thyrocytes and delta mean fluorescence intensity (dMF) in both thyrocyte sources were significantly reduced in the presence of 200 ng/ml oPRL (both GD and Control: P<0. 01 and P<0. 05, respectively; Contro l: P<0. 05) and 1000 ng/ml oPRL (GD: P<0. 01; Control: P<0. 05). oPRL caused significant increasing in IL- 4- inhibited percentages of CD40［+］ ce lls from the two groups of thyrocytes at 12. 5 ng/ml and 1000 ng/ml and dMF fr om GD thyrocytes at 1000 ng/ml (P<0. 05). Conclusions PRL can exert indirect effects on CD40 expressions on thyrocytes by antagonizing the modulatory actions of IFN- γ and IL- 4 with dose- related effects. This m ay be one important mechanism for PRL to affect the development of GD.     

膝骨关节病的关节镜诊断治疗

目的 通过对79例84膝骨关节病的关节镜诊断治疗回顾性总结,探讨高效率、创伤小、疗效佳的方法。方法 采用关节镜微创技术,结合术前检查对膝骨关节病分为：软骨破坏型,滑膜类型,游离体型及半月板型,依此施行有针对性,局限化手术治疗。结果 69膝得到6mo-3a的随访,按膝关节综合评分表评分,优20％,良59％,可和差21％。结论 该方法具有创伤小、康复快、并发症少等优点,在病损严重的病例,全膝置换或截骨术是进一步提高总体疗效的适宜选择。     

雷公藤多苷治疗儿童肾病综合征的机制探讨

目的 :探讨雷公藤多苷在治疗儿童肾病综合征中的作用及其机制。　方法 :对 16年来在我科住院明确病理类型的 5 5 0例中 10 5例肾病综合征患儿 ,在激素逐渐减量的同时用雷公藤多苷 ( 1m g/ kg· d- 1 )治疗。　结果 :81例肾病综合征获得缓解 ,总缓解率达 77.1% ,其中 MCNS( 2 4例 )、Ms PGN ( 46例 )、MPGN ( 17例 )、MN ( 13例 )和FSGS( 5例 )的缓解率分别为 91.7%、89.1%、76 .5 %、38.5 %和 0 % ,FSGS效果最差 ;14例改善 ,10例无效。　结论 :由于病理类型不同疗效相差较大 ,临床上对激素治疗无效或耐药的肾病综合征患儿 ,应及时行肾活检以明确病理诊断 ,对病理类型为 MCNS和 Ms PGN者可单用雷公藤多苷治疗 ,以避免长期应用激素的不良反应 ,这是治疗儿童肾病综合征的有效方法之一     

阉割和睾酮替代对大鼠应激免疫抑制蛋白的影响

目的 :研究阉割和睾酮替代对束缚应激模型大鼠血清中应激免疫抑制蛋白的影响。方法 :成年雄性SD大鼠随机分为正常对照组、假手术组、阉割组、阉割后睾酮替代组。每组 10～ 12只。以上各组随机抽出一半给予束缚应激 ,另一半作为不应激对照。观察各组大鼠血清对ConA诱导的淋巴细胞转化的作用 ,作为反映血清中应激免疫抑制蛋白含量的指标。在离体实验中观察不同浓度的睾酮对淋巴细胞转化的直接作用。结果 :阉割可促进应激大鼠血清中应激免疫抑制蛋白的产生 ,睾酮替代可对抗这一作用。结论 :睾酮可在一定范围内对抗应激免疫抑制蛋白的产生。     

蛋白酪氨酸磷酸酶H 型受体的生物学功能及其在肿瘤中的研究进展

蛋白酪氨酸磷酸酶H型受体(protein tyrosine phosphatase H receptor,PTPRH)基因是一种编码胃癌相关蛋 白的基因,通过翻译后COOH-末端区域的酪氨酸磷酸化修饰发挥其生物学功能。PTPRH在多种肿瘤中呈异常表达, 其生物学功能与肿瘤的发生、发展及预后密切相关。     

Undifferentiated carcinoma with osteoclast-like giant cells of the pancreas diagnosed by endoscopic ultrasonography-guided fine-needle aspiration

Undifferentiated carcinoma with osteoclast-like giant cells, also formerly known as osteoclast-like giantcell tumor, is a rare neoplasm of the pancreas and usually diagnosed after pancreatectomy. The presence of non-neoplastic osteoclast-like giant cells is the histological hallmark of this tumor and the diagnosis is usually not difficult on tissue sections. However there have been relatively few reports regarding the cytological features of this type of tumor in literatures.1-4 Here we.     

Chemical conjugation of a novel antibody-interleukin 2 immunoconjugate agains t c-erbB-2 product

Objective To develop a new chemical method to produce a monoclonal antibody (MoAb) 520C9/recombinant human interleukin 2 (rhIL-2) conjugate. Methods MoAb 520C9 reactive with the protooncogene c-erbB-2 product P185 was chemically conjugated with rhIL-2 by using a simple two-step method.First, the rhIL-2 was activated by Sulfosuccinimidyl 4-［N-maleimidomethyl］ cyclohexane-1-carboxylate, a heterobifunctional linker, and N-succinimidyl s-acetylthioacetate was introduced onto 520C9.Then SATA on the 520C9 was reacted with the maleimide group on the activated rhIL-2 to generate 520C9-rhIL-2 immunoconjugate. Results The immunoconjugate retained the antigen binding activity compared to the respective native antibody as determined by an indirect live cell binding assay.The immunoconjugate also possessed IL-2 activity as measured by the standard CTLL-2 cells proliferation assay and the stimulation of human peripheral blood mononuclear cells (PBMCs) into lymphokine-activated killer cells. Conclusion Our method of conjugation of rhIL-2 to 520C9 preserves the binding activity of the antibody and the cytokine function of IL-2.This simple and efficient method of conjugation should be applicable to other types of MoAbs and recombinant cytokines.     

急性胰腺炎患者IL-6、TNFα水平测定及临床意义

目的研究急性胰腺炎患者IL-6、TNFα分泌情况及其临床意义。方法选择30例急性胰腺炎患者和28例健康对照,用生物学方法检测血浆中IL-6、TNFα的水平。结果急性胰腺炎患者血浆中IL-6、TNFα分别为(76．4±10．1)k u/L、60．7％±12．3％,均高于正常对照组(20．8±6．1)ku/L、12．4％±4．7％,随疾病的恢复逐渐趋于正常(28．5±9．1)ku/L、18．8％±6．4％。结论急性胰腺炎患者血浆中的IL-6、TNFα水平均高于正常组,说明二者参与这一炎症过程。     

复杂原发性视网膜脱离的综合疗法

目的：探讨综合疗法对原发性视网膜脱离的手术效果及并发症。方法：采用环扎巩膜外势压及眼内注气等综合疗法。结果：治疗成功率由８５％提高到９０％。结论：综合疗法治疗原发性视网膜脱离是一种行之有效的方法。