Compromised kidney graft rejection response in Vervet monkeys after withdrawal of immunosuppressants tacrolimus and sirolimus

BACKGROUND: In nonprimates, organ allografts are often not rejected after withdrawal of immunosuppression. In this study, we examined whether such a phenomenon also occurs in primates. METHODS: Vervet monkeys were transplanted with renal allografts and treated for 60 days with tacrolimus, or tacrolimus plus sirolimus. The drugs were totally withdrawn on day 61. The survival of the monkeys was monitored, and their response to donor- or third party-derived alloantigens was examined in vivo and in vitro. RESULTS: The majority (80-100%) of the grafts survived for at least additional 30 days with no signs of acute rejection. The compromised rejection is donor-specific, because recipient monkeys failed to reject a donor-derived skin graft, but a third-party skin graft was rejected. In vitro mixed lymphocyte reaction and interleukin-2 production in the mixed lymphocyte reaction between the recipients and their donors or between the recipients and a third party had no discernable patterns, and thus did not reflect the in vivo status of the immune system. Although the recipients could not reject the graft acutely after drug withdrawal, the kidney grafts and the donor-derived skin grafts had pathological findings of chronic rejection. CONCLUSIONS: The rejection response of the monkeys to an established graft after withdrawal of immunosuppression is compromised. The compromised rejection is specific and is not due to a permanent alteration of the immune system by the initial drug treatment. The allografts are not inert but have low levels of interaction with the recipient immune system.     

不同产地白术的多糖含量测定

目的:对不同产地共8批白术的多糖含量进行了测定。方法:苯酚-硫酸比色法。结果:不同产地白术的多糖含量差异较大。结论:该法为白术的质量评价及质量控制提供了研究基础。     

美国间谍小说的起源、发展与现状

美国间谍小说的起源可以追溯到詹姆斯·库珀的《间谍》 ,但发展缓慢。其原因在于美国人崇尚明斗的西部硬汉精神 ,而美国政府历来对间谍工作也未予重视 ,直到20世纪30年代美国的间谍小说还不很成熟 ,40年代才出现了较有影响的间谍小说女作家海伦·麦克英纳斯。至70年代却大有后来居上之势 ,并在题材上形成业余间谍、硬派间谍和反间谍三足鼎立的格局     

Experiment study on combined free periosteum grafting and new reconstituted bone xenograft in repairing segmental defects

Segmental bone defects in long bones often pose achallenge tO their sMcal ~nt, and the vasculallzedperiosted po used either alone or in combination withother ~ materials has been Preferred as a uSeals solution to this Problems"'l. HOwever, the use Of vascularized graft has to resort to ndcrosuopcal tecboqUes, Whichmakes it difficult tO populallze this OPe~ in the graSsests level intitutions. We Pimeeded with combined useOf free Periosteum and new reconshtuted bine xenograft(NRBX) in re…     

腺病毒介导的大肠杆菌CD自杀基因体内外对肿瘤杀伤作用的研究

编委会 Editorial Board名誉主编 Honorary Editor-in-chief吴孟超 Wu Meng chao(Second Military Medical University,Shanghai 200433学术顾问 Academic Advisers巴德年 Ba Denian(Chinese Academy of Medical Sciences,Beijing 100730)刘新垣 Liu Xinyuan(Shanghai Institute of Biochemistry,Chinese Academy of Sciences,Shanghai 200031)吴旻 WuMin(Cancer Institute,Chinese Academy of Medical Sciences,Beijing 100021)汤钊猷 Tang Zhaoyou(Shanghai Medical University,Shanghai 200032)主编 Editor-in-chief张友会 Zhang Youhui(Cancer Institute,Chinese Academy of Medical Sciences,Beijing,100021)副主编 Associate Editor-in-chief崔正言 Cul Zhenyan(Department of Immunology,Shandong Academy of Medical Sciences,Jinan 250001)钱振超 Qian Zhenchao(Department of Patho-physiology,Dalian Medical University,Dalian 116027)何球藻 He Qiuzao(Department of Immunology,Shanghai Medical University,Shanghai 200032)董志伟 Dong Zhiwei(Cancer Institute,Chinese Academy of Medical Sciences,Beijing 100021)常务副主编 Managing Editor-in-chief     

经IFN-γ诱导的人IL-2基因修饰的人原代成纤维细胞体外细胞因子表达及某些免疫学特性的研究

成纤维细胞作为基因治疗载体细胞是肿瘤基因治疗的一项重要途径,但以往的研究仅仅将成纤维细胞作为载体而忽略了其自身的免疫学功能的发挥。本文采用本室构建的逆转录病毒载体将IL-2基因转入人原代成纤维细胞,再用IFN-7诱导。结果表明,IFN-7诱导后,IL-2基因修饰的成纤维细胞MHC-Ⅰ、MHC-Ⅱ、CD40等分子表达具有一定程度的增高,并且表达IL-2、IL-1、IL-6等,由于这些免疫分子及细胞因子的表达与肿瘤抗原的递呈、效应细胞的激活密切相关,提示这种经IFN-7诱导后的IL-2基因修饰的成纤维细胞可能作为抗原递呈细胞而参与肿瘤抗原的递呈及效应细胞的激活。     

NOVA16急诊生化分析仪试剂包中A、R、H液的研制与应用

目的 研制ＮＯＶＡ１６全自动急诊生化分析仪试剂包中Ａ,Ｒ,Ｈ液。方法 根据电极法测定血浆（或全血）中Ｎａ＾＋、Ｋ＾＋、Ｃｌ＾－、ＴＣＯ２、Ｇｌｕ、Ｕｒｅａ、Ｃｒ等物质浓度（活度）和红细胞压积（Ｈｅｍａｔｏｃｒｉｔ,Ｈｃｔ）的原理及标准液配制的有关要求,配制类似血浆水的Ａ液、ＣＯ２释放液Ｈ及参比液Ｒ。结果 自配Ａ,Ｒ,Ｈ液与原装试剂的主要理化指标：ｐＨ、渗透压、电极斜率、线性范围及试剂的稳定性等方面     

药食两用中药复方对去卵巢大鼠内分泌激素的影响

目的：探讨药食两用中药复方治疗绝经期综合征的作用机理。方法：以去卵巢大鼠为动物模型，已烯雌酚片为阳性对照药物，采用放射免疫测定法观察该复方对血清E2，FSH，LH，T，P，T3，T4及TSH等激素水平的影响。结果：与去卵巢空白对照组比较，该中药复方能升高血清E2值，降低血清FSH，LH，T3，T4值，差异均有显著性（P〈0．05）。结论：该中药复方能多途径调节卵巢大鼠生殖内分泌功能，改善甲状腺功能。提示其能够稳定机体内环境，缓解绝经期综合征症状。     

17例内窥镜下早期食管癌的放疗疗效

目的　探讨内窥镜下早期食管癌的放疗疗效。方法　17例早期食管癌经内窥镜及碘染色确诊,并经活检病理证实。6MVX线3个野外照射,先常规分割30Gy ,15分次,3周完成;复位后行后程加速超分割照射,1.5Gy/次,2次/d ,间隔6h以上,共2 0～2 4Gy ,14～16分次,9～10d完成。生存率分析采用Kaplan Meier法。结果　17例早期食管癌放疗1、3、5年生存率分别为10 0 %、86 %、6 6 %。病变长度≤3cm的5年生存率为10 0 % ,>5cm的为4 9% (P =0 .111)。病变厚度≤5mm的5年生存率为10 0 % ,>5mm的为4 5 % (P =0 .10 2 )。结论　早期食管癌放疗是有效的方法,照射野大小应根据内窥镜及碘染色所确定的病变范围而定;常规分割30Gy15分次3周+后程加速超分割2 0～2 4Gy14～16分次9～10d照射是可行的。