小鼠胸腺上皮细胞株MTEC_B自发产生低水平IL－6

本室所建立的小鼠胸腺上皮细胞株ＭＴＥＣＢ以５．０×１０５细胞／ｍｌ的浓度在含１０％小牛血清的ＤＭＥ培养液中，５％ＣＯ２３７℃条件下，培养６ｄ，离心收集上清液。以ＩＬ－６依赖细胞株采用ＭＴＴ法对ＭＴＥＣＢ的上清液进行ＩＬ－６活性检测。结果发现ＭＴＥＣＢ能自发产生低水平的ＩＬ－６，其活性单位为１９．２Ｕ／ｍｌ。ＭＴＥＣＢ的ＩＬ－６产生量低于文献报道的其他胸腺上皮细胞株，说明我们建立的胸腺上皮细胞株有新的特点，反映出胸腺上皮细胞存在高度异质性。     

ICAM-1抗体诱导小鼠胸腺上皮细胞分泌IL-6

目的研究胸腺细胞和ＩＣＡＭ－１抗体对胸腺上皮细胞分泌ＩＬ－６的作用。方法用促ＩＬ－６依赖株增殖法检测ＩＬ－６活性，用原位杂交法检测ＩＬ－６ｍＲＮＡ的表达。结果不同的胸腺细胞亚群均能促进ＭＴＥＣ１分泌ＩＬ－６，而且作用无明显差异。ＩＣＡＭ－１抗体能够促进ＭＴＥＣ１分泌ＩＬ－６，其促进作用呈剂量依赖关系。放线菌酮预处理ＭＴＥＣ１以后，ＩＣＡＭ－１抗体和胸腺细胞均不再能促进ＭＴＥＣ１分泌ＩＬ－６。原位杂交证实，经胸腺细胞和ＩＣＡＭ－１抗体活化后，ＭＴＥＣ１表达ＩＬ－６ｍＲＮＡ明显增多，并且表达ＩＬ－６ｍＲＮＡ的ＭＴＥＣ１数量也增多。提示胸腺细胞和ＩＣＡＭ－１抗体能促进ＭＴＥＣ１合成新的蛋白和ｍＲ－ＮＡ。结论胸腺微环境内，胸腺细胞可以通过粘附分子与胸腺上皮细胞相互作用，并可促进胸腺上皮细胞分泌ＩＬ－６。     

小鼠胸腺上皮细胞株MTECB自发产生低水平IL—6

本室所建立的小鼠胸腺上皮细胞株ＭＴＥＣＢ以５．０×１０＾５细胞／ｍｌ的浓度在含１０％小牛血清的ＤＭＥ培养液中，５％ＣＯ２３７℃条件下，培养６ｄ，离心收集上清液。以ＩＬ－６依赖细胞株采用ＭＴＴ法对ＭＴＥＣＢ的上清液进行ＩＬ－６活性检测。结果发现ＭＴＥＣＢ能自发产生低水平的ＩＬ－６，其活性单位为１９．２Ｕ／ｍｌ。ＭＴＥＣＢ的ＩＬ－６产生量低于献报道的其他胸腺上皮细胞株，说明我们建立的胸腺上皮细胞株有     

胸腺细胞对胸腺止皮细胞分泌IL-6的促进作用

为分析胸腺细胞对胸腺基质细胞功能的调节作用，将胸腺细胞与小鼠胸腺上皮细胞系（ＭＴＥＣ１）共育，分析胸腺细胞对ＭＴＥＣ１分泌ＩＬ－６的影响。结果表明，胸腺细胞能明显促进ＭＴＥＣ１分泌ＩＬ－６，其促进程度与两种细胞的数量及共育时间有关。胸腺细胞（４×１０~６／孔）与ＭＴＥＣ１（１×１０~５／孔）共育４８小时，ＭＴＥＣ１分泌ＩＬ－６达高峰。去除胸腺细胞后９６小时，ＭＴＥＣ１分泌ＩＬ－６的量仍比单独培养的ＭＴＥＣＩ多１．７倍。经丝裂霉素Ｃ处理的胞腺细胞仍能促进ＭＴＥＣ１分泌ＩＬ－６，其作用程度与末经处理的胸腺细胞相似。而胸腺细胞培养上清及裂解液则不影响ＭＴＥＣ１分泌ＩＬ－６，从而证实胸腺细胞能促进ＭＴＥＣＩ分泌ＩＬ－６，其作用机制可能与细胞-细胞直接相互作用有关。     

九株小鼠胸腺基质细胞系自发分泌白细胞介素7的能力

胸腺基质细胞（ＴＳＣ）及其分泌的细胞因子在Ｔ细胞发育中起重要作用。我们以真核表达质粒ｐＣＤ－ＳＲα－ｍＩＬ－７在Ｃｏｓ细胞中表达了小鼠重组白细胞介素７（ｍｒＩＬ－７），活性为１．０６×１０＾４ｕ／ｍｌ。应用特异依赖ＩＬ－７生长的ｃｌｏｎｅＫ细胞株测定ＩＬ－７的生物活性方法，检测了本室自建的９株小鼠胸腺基质细胞（ＭＴＳＣ）系分泌ＩＬ－７的能力，９株均可自发分泌低水平的ＩＬ－７，活性介于３８～２６８ｕ     

胸腺细胞对胸腺上皮细胞分泌IL—6的促进作用

为分析胸腺细胞对胸腺基质细胞功能的调节作用，将胸腺细胞与小鼠胸腺上皮细胞系（ＭＴＥＣ１）共育，分析胸腺细胞对ＭＴＥＣ１分泌ＩＬ－６的影响。结果表明，胸腺细胞能明显促进ＭＴＥＣ１分泌ＩＬ－６，其促进程度与两种细胞的数量及共育时间有关。胸腺细胞（４×１０＾６／孔）与ＭＴＥＣ１（１×１０＾５／孔）共育４８小时，ＭＴＥＣ１分泌ＩＬ－６达高峰。去除胸腺细胞后９６小时，ＭＴＥＣ１分泌ＩＬ－６的量仍比单独培养的     

胸腺因子D对白血病IL-6和TNF的调控作用

探讨胸腺因子Ｄ（ＴＦＤ）对白血病患者白介素６（ＩＬ－６）和肿瘤坏死因子（ＴＮＦ）的调控作用,以便在白血病治疗中正确使用ＴＦＤ。在白血病化疗同时,加用ＴＦＤ５０ｍｇ＋１０％葡萄糖注射液５００ｍｌ,ＶＤ,ｑｄ×３ｍｏｎ,检测治疗前后ＩＬ－６活性和ＴＮＦ水平。结果：急性淋巴细胞性白血病（ＡＬＬ）和急性非淋巴细胞白血病（ＡＮＬＬ）的ＩＬ－６和ＴＮＦ均比正常对照组高（Ｐ＜０．０１）。化疗加用ＴＦＤ治疗后,ＡＬＬ的ＩＬ－６和ＴＮＦ及ＡＮＬＬ的ＴＮＦ均比治疗前和化疗组显著降低。ＴＦＤ加化疗药物联合应用,可能是白血病的有效治疗方法。     

NF-κB活化在IL-1β诱导的小鼠肾小球系膜细胞表达IL-6中的作用

目的：研究NF-κB在rhIL-1β刺激引起的体外培养的鼠肾小球系膜细胞表达IL-6中的作用。方法： NF-κΒ活性检测采用电泳迁移率改变法(EMSA),IL-6 mRNA表达采用逆转录/聚合酶链反应(RT/PR)检测,培养上清IL-6蛋白含量采用ELISA检测。结果：rhIL-1β刺激肾小球系膜细胞时,在上调IL-6蛋白和基因表达的同时亦激活NF-κB,而且这种上调作用可被NF-κB特异性抑制剂PDTC所阻抑。结论： IL-1β诱导鼠肾小球系膜细胞表达IL-6是通过NF-κB调控,NF-κB可能参与肾小球肾炎的免疫炎症反应。     

胸腺因子D对飞行员IL—6诱生水平的影响

利用ＭＴＴ比色法和ＥＬＩＳＡ法研究了飞行员白细胞介素６（ＩＬ－６）活性的变化及胸腺因子（ＴＦＤ）对飞行员ＩＬ－６诱生水平的影响。结果表明：飞行员的血清ＩＬ－６诱生水平分别为１１．２±４．６Ｕ／ｍｌ和１０．１４±２．４６ｎｇ／ｍｌ，均明显高于地勤人员，而且ＴＦＤ可以在体外明显降低飞行员的ＩＬ－６诱生水平。     

NF-κB活化在IL-1β诱导的小鼠肾小球系膜细胞表达IL-6中的作用

目的:研究NF-κB在rhIL-1β刺激引起的体外培养的鼠肾小球系膜细胞表达IL-6中的作用。方法:NF-κΒ活性检测采用电泳迁移率改变法(EMSA),IL-6mRNA表达采用逆转录/聚合酶链反应(RT/PR)检测,培养上清IL-6蛋白含量采用ELISA检测。结果:rhIL-1β刺激肾小球系膜细胞时,在上调IL-6蛋白和基因表达的同时亦激活NF-κB,而且这种上调作用可被NF-κB特异性抑制剂PDTC所阻抑。结论:IL-1β诱导鼠肾小球系膜细胞表达IL-6是通过NF-κB调控,NF-κB可能参与肾小球肾炎的免疫炎症反应。     

人胸腺内Ghrelin的免疫组织化学定位

目的:观察Ghrelin在人胸腺的定位与分布,为深入探讨胸腺内Ghrelin的功能意义提供实验依据。方法:采用特异性抗Ghrelin血清,用免疫组织化学ABC法观察人胸腺内Ghrelin的定位与分布。结果:Ghrelin免疫反应阳性细胞在胸腺内分布广泛。胸腺皮质浅层的Ghrelin阳性细胞呈巨噬细胞形态特点;而皮髓质交界区有大量上皮性网状细胞呈Ghrelin免疫反应阳性;胸腺髓质内Ghrelin阳性信号主要定位于树突状细胞和上皮性网状细胞;胸腺小体呈Ghrelin免疫反应强阳性。结论:胸腺内Ghrelin分布广泛,定位于胸腺巨噬细胞、上皮性网状细胞、树突状细胞和胸腺小体。Ghrelin可能参与胸腺细胞分化和成熟的调节。     

Activation of cortical and inhibited differentiation of medullary epithelial cells in the thymus of lymphotoxin-beta receptor-deficient mice: an ultrastructural study

The reciprocal influences of thymic lymphocyte and nonlymphocyte populations, i.e. thymic cross-talk, are necessary for the proper maturation of thymocytes and the development/maintenance of thymic stromal microenvironments. Although the molecular influences exerted by thymic stromal cells on maturing thymocytes have been extensively studied, the identity of signalling molecules used by thymocytes to influence the thymic stromal cells is still largely unknown. Our study provides the first ultrastructural evidence that the functional lymphotoxin-beta receptor (LTbetaR) signalling pathway is engaged in the cross-talk between thymocytes and the thymic stromal cell population. We show that LTbetaR signalling is of the utmost significance for the preservation of the subcellular integrity of all thymic epithelial cells. In the absence of LTbetaR there is (1) hypertrophy and activation of cortical thymic epithelial cells, (2) the complete loss of fully differentiated medullary thymic epithelial cells, and (3) the inhibited differentiation of remaining medullary thymic epithelial cells with the appearance of prominent intercellular cysts in the thymic medulla.     

Increased interleukin-6 messenger RNA expression in macrophage-cocultured endometrial stromal cells in adenomyosis

PROBLEM: To determine the effects of macrophage on endometrial stromal cells (ESCs) in women with adenomyosis. METHOD OF STUDY: Eutopic endometrium was obtained and separated into single ESC in 10 women with adenomyosis (study group) and 11 without adenomyosis (control group). ESCs were then cultured alone or with macrophage for 24 hr. RESULTS: Immunohistochemistry identified the presence of interleukin-6 (IL-6), IL-8, and IL-10 in ESCs. Real-time quantitative PCR revealed that the IL-6 mRNA was significantly expressed in macrophage-cocultured ESCs in adenomyosis than that in the controls, but was not different in ESCs cultured alone between the two groups. The levels of IL-8 and IL-10 mRNA were similar in ESCs either cultured alone or with macrophage between women with and without adenomyosis. CONCLUSION: IL-6 mRNA was significantly expressed in ESCs after in vitro coculture with macrophage in adenomyosis. This aberrant behavior of ESCs might play a role in the formation of ectopic endometrial implants in adenomyosis.     

Alternative splicing of interleukin-6 mRNA in mice

Expression of mRNA for interleukin-6, interleukin-6Δ3, and interleukin-6Δ5 was detected in placental tissue (second and third trimesters of pregnancy) and spleen of mice immunized with sheep erythrocytes in high dose. We hypothesize that translation of mRNA yields proteins capable of binding to individual subunits of the interleukin-6 receptor and possessing effector functions. Translated fromByulleten’ Eksperimental’noi Biologii i Meditsiny, Vol. 138, No. 7, pp. 87–90, July, 2004     

Effects of interleukin-6 blockade on the development of autoimmune thyroiditis in nonobese diabetic mice

We explored the role of interleukin-6 (IL-6) in the development of autoimmune thyroiditis in nonobese diabetic (NOD) mice, an animal model of Hashimoto's thyroiditis, using anti-mouse IL-6 receptor antibody (MR16-1). Thyroiditis was induced by iodide ingestion or mouse thyroglobulin (Tg) immunization. Mice were injected intraperitoneally with saline, control rat IgG, or MR16-1 (2 or 8 mg). Iodide ingestion did not increase serum IL-6 levels and MR16-1 (2 mg) failed to prevent the development of thyroiditis. In contrast, Tg immunization induced a rapid and significant increase in serum IL-6 levels. While MR16-1 (2 mg) had no effect on Tg-induced thyroiditis, the severity, but not incidence, of thyroiditis was reduced in 8 mg MR16-1-treated mice compared with saline-injected mice. However, thyroiditis development in the 8 mg MR16-1-treated mice was indistinguishable from that in the control IgG-treated mice. MR16-1 (8 mg) did not affect serum anti-Tg antibody levels. These results suggest that IL-6 may play only a minor role in the development of autoimmune thyroiditis in NOD mice.     

Localization of cytoplasmic antigens of cells of differentiated layers of the epidermis in epithelium of the human thymus

N. F. Gamaleya Research Institute of Epidemiology and Microbiology, Academy of Medical Sciences of the USSR, Moscow. (Presented by Academician of the Academy of Medical Sciences of the USSR S. V. Prozorovskii.) Translated from Byulleten' Éksperimental'noi Biologii i Meditsiny, Vol. 109, No. 3, pp. 308–310, March, 1990.     

剪接因子SC35在大鼠胸腺细胞内的定位

目的：观察剪接因子SC35在大鼠体内重要器官内分布情况。方法：采用免疫酶以及免疫电镜技术对剪接因子SC35从组织学分布到超微结构定位进行了系统研究。结果：胸腺内大部分细胞内含有SC35或SC35类蛋白，而在肝和肾内未发现有标记。金颗粒主要分布在细胞核的染色质间区和染色质周边及核仁的致密纤维组分区中。大自鼠胸腺细胞内的金颗粒密度为细胞核内33．05个/μm^2，核仁内21.77个／μm^2，细胞质内9．90个/μm^2，对照组细胞内则金颗粒极少或没有，而在肝和肾细胞内未见。结论：SC35或SC35类蛋白存在于大鼠胸腺内，而非肝和肾。     

Role of the thymus in regulation of production of macrophage migration inhibitory factor in mice of different genotypes

The effect of the thymus on production of macrophage migration inhibitory factor (MMIF) was studied in C57BL and CBA mice thymectomized at the age of 4–6 weeks. MMIF production in response to stimulation by tuberculin was estimated at the peak of the immune response on the 1st–21st days after the operation. This factor was found to be produced as early as the 1st day after thymectomy. MMIF production is absent in athymic nude mice. Thymectomy also stops the immune response in the early stages of its development. Spontaneous migration of macrophages also is modified in immune and nonimmune animals. These changes are more marked in C57BL mice.Department of Immunology, N. I. Pirogov Second Moscow Medical Institute. (Presented by Academician of the Academy of Medical Sciences of the USSR R. V. Petrov.) Translated from Byulleten' Éksperimental'noi Biologii i Meditsiny, Vol. 88, No. 9, pp. 311–314, September, 1979.     

体外培养新生小鼠胸腺的超微结构

目的 :观察器官培养的新生小鼠胸腺内细胞的生长状况。方法 :将新生BALB/c小鼠胸腺分为 4组 ,分别在体外培养 1d、3d、5d和 7d ,然后用透射电镜观察其各部位的超微结构。结果 :从 1d组开始 ,胸腺细胞的生长状况便呈现出明显的区域性差别 :胸腺周边部的细胞排列紧密 ,形态结构正常 ,与对照组无差别 ;胸腺中间部的细胞排列较松散 ,少部分形态结构正常 ,大部分呈死亡状态。结论 :胸腺周边部的细胞生长良好 ;中间部的细胞少量生长良好 ,大部分死亡