γ－干扰素在淋巴细胞介导的子宫颈角化上皮细胞毒作用中的意义

本研究以子宫颈角化上皮为靶细胞，用试管培养技术及非同位素细胞毒性试验，探讨了干扰素（ＩＦＮ－γ）对淋巴细胞介导的对宫颈角化上皮细胞毒作用的影响及细胞间吸附分子１（ＩＣＡＭ－１）与白细胞功能相关抗原１（ＬＦＡ－１）在细胞毒作用中的意义。结果显示ＣａＳｋｉ、ＳｉＨａ、ＨｅＬａ、Ｗ１２及ＮＣｘ均为ＮＫ抵抗、ＬＡＫ敏感细胞。ＩＦＮ－γ预处理靶细胞明显增加ＬＡＫ细胞的杀伤活性，但对ＮＫ活性影响不大；ＩＦＮ－γ预处理效应细胞可增强ＬＡＫ细胞对上述靶细胞的溶解作用，但并不改变ＮＫ对靶细胞的选择性；抗ＩＣＡＭ－１与ＬＦＡ－１单克隆抗体能有效地降低ＬＡＫ细胞对靶细胞的杀伤作用，而抗ＨＬＡＡＢＣ及ＨＬＡＤＲ则无此作用。提示ＩＦＮ－γ仅对ＬＡＫ细胞介导的对宫颈角化上皮的细胞毒作用有明显增强作用，而对ＮＫ细胞无明显影响；ＩＣＡＭ－１－ＬＦＡ－１通路为ＬＡＫ细胞结合并溶解靶细胞的主要通路，且这种细胞毒作用是非ＭＨＣ限制的。     

淫羊藿甙逆转转化生长因子β2对LAK,CD3AK细胞的免疫抑 …

目的 探讨淫羊藿甙逆转转化生长因子β２（Ｔｒａｎｓｆｏｒｍｉｎｇ Ｇｒｏｗｔｈ Ｆａｃｔｏｒ β２ＴＧＦβ２）对ＬＡＫ、ＣＤ３ＡＫ细胞的免疫抑制作用及其机制。方法 采用ＭＴＴ法,ＲＴ－ＰＣＲ和流式细胞术。结果 淫羊藿降转受ＴＧＦβ２抑制的ＬＡＫ和ＣＤ３ＡＫ细胞的杀伤活性,并能部分恢复受ＴＧＦβ２抑制的ＬＡＫ细胞表面ＩＬ－２Ｒα表达和ＣＤ３ＡＫ细胞内穿孔素ｍＲＮＡ水平,以及ＣＤ３ＡＫ细胞的增殖活性。     

γ—干扰素在淋巴细胞介导的子宫颈角化上皮细胞毒…

本研究以子宫颈角化上皮为靶细胞，用试管培养技术及非同位素细胞毒性试验，探讨了干扰素（ＩＦＮ－γ）对淋巴细胞介导的对宫颈角化上皮细胞毒作用的影响及细胞间吸附分子１（ＩＣＡＭ－１）与白细胞功能相关抗原１（ＬＦＡ－１）在细胞毒作用中的意义。结果显示ＣａＳｋｉ、Ｓｉｈａ、ＨｅＬａ、Ｗ１２及ＮＣｘ均为ＮＫ抵抗、ＬＡＫ敏感细胞。ＩＦＮ－γ预处理靶细胞明显增加ＬＡＫ细胞的杀伤活性，但对ＮＫ活性影响不大；ＩＦＮ－     

体外培养的人胸腺上皮细胞与胸腺细胞的相互作用

人胸腺上皮细胞（ＴＥｃ）的体外培养和传代，使研究人ＴＥｃ的特性和功能成为可能。人ＴＥｃ体外培养成功的关键是抑制成纤维细胞的生长。体外培养的人ＴＥｃ除表达角蛋白外，还表达ＨＬＡ－Ｉ类抗原、ＬＦＡ－３，ＩＣＡＭ－１和ＣＤ４０等表面抗原；可分泌ＩＬ－１，ＩＬ－６，ＩＬ－８，ＧＭ－ＣＳＦ，Ｇ－ＣＳＦ和Ｍ－ＣＳＦ等多种细胞因子和胸腺素；静息的胸腺细胞与ＴＥＳ的结合由ＣＤ２／ＬＦＡ－３介导，激活的胸腺细胞与ＴＥＣ的结合由ＣＤ２／ＬＦＡ－３和ＬＦＡ－１／ＩＣＡＭ－１共同介导；ＴＥＣ对成熟的胸腺细胞有辅助增殖的作用，对不成熟的胸腺细胞有直接激活作用：胸腺细胞可通过直接作用和分泌细胞因子的间接作用来调节ＴＥＣ的细胞因子分泌和表面抗原表达。     

自杀基因TK联合细胞因子FL真核表达载体的构建及其相 …

目的 探讨自杀基因ＴＫ（ｔｈｙｍｉｄｉｎｅ ｋｉｎａｓｅ,胸苷激酶）与细胞因子ＦＬ（ＬＩｔ－３ｌｉｇａｎｄ,ＦＩｔ－３配体）在同一细胞克隆中表达的特性,为肿瘤的基因冶疗提供实验基础。方法 构建以ＩＲＥＳ（内部核糖体进入位点）相连的ＴＫ与ＦＬ的真核表达质粒,脂质体法转入人乳腺癌细胞株ＭＣＦ－７中。ＭＴＴ法检ＧＣＶ（Ｇａｎｃｉｃｌｏｖｉｒ,更昔洛韦）对ＭＣＦ－７／ＴＫ－ＦＬ细胞的杀伤活性,电镜、光镜     

γδT细胞、NK细胞及LAK的部分抗肿瘤生物特性比较

目的：通过体外分离、增殖培养获取γδＴ细胞、ＮＫ细胞和ＬＡＫ细胞,并比较了３种细胞的抗肿瘤的生物学特性。方法：收集用不同单抗分别馐被粘附的细胞,然后通过ＭＡＣＳ细胞分选仪的分选,获取的细胞进行细胞增殖动力学、细胞表型、细胞杀伤活性的测定以单抗阻断效应的分析。结果：经ＭＡＣＳ分离得到的γδＴ细胞,培养２ｗ后细胞数扩散６００～８００倍,ＣＤ３、ＣＤ８和γδ细胞表达阳性率分别是７２．２９％、５８．０２％和６５．９８％。γδＴ细胞对ＮＫ敏感细胞Ｋ５６２以及ＮＫ不敏感细胞Ｒａｊｉ和ＸＧ－７这３种不同靶细胞均有较高的杀伤率,分别为３５．９８％、４２．２７％和６９．０８％;ＮＫ细胞对此３种细胞杀伤率分别是４５．１２％、１２．３４％和２９．２７;ＬＡＫ细胞的杀伤率分别为４４．０１％、２９．２７％和２５．６８％。γδＴ细胞对经Ｍ     

TNF基因转染后分泌不同水平TNF的LAK细胞克隆增殖能力和杀伤活性的比较

在逆转录病毒介导下将ＴＮＦ基因转染入小鼠ＬＡＫ细胞中，采用Ｇ４１８抗性筛选和有限稀释法，将ＬＡＫ细胞克隆化，并筛选出３株分泌不同水平ＴＮＦ的ＬＡＫ细胞克隆。结果表明，这３株ＬＡＫ细胞克隆分泌的ＴＮＦ水平、增殖能力和杀伤活性均显著高于对照组ＬＡＫ细胞。而高分泌株的ＬＡＫ细胞克隆，其增殖能力和杀伤活性最高；中分泌株次之；低分泌株相对较低。抗ＴＮＦ单抗可显著抑制此３株ＬＡＫ细胞体外杀伤活性，表明其杀伤活性升高是由基因转染后所表达的ＴＮＦ介导的，所表达ＴＮＦ水平越高，其增殖能力和杀伤活性越高。     

CHANGES OF 6-K-PGF_(1a) RELEASE FROM THE LUMINAL SURFACE OF DACRON SEEDED WITH AUTOLOOUS VENOUS TISSUE FRAGMENTS

ＣＨＡＮＧＥＳＯＦ６－Ｋ－ＰＧＦ１ａＲＥＬＥＡＳＥＦＲＯＭＴＨＥＬＵＭＩＮＡＬＳＵＲＦＡＣＥＯＦＤＡＣＲＯＮＳＥＥＤＥＤＷＩＴＨＡＵＴＯＬＯＯＵＳＶＥＮＯＵＳＴＩＳＳＵＥＦＲＡＧＭＥＮＴＳＣＨＡＮＧＥＳＯＦ６－Ｋ－ＰＧＦ１ａＲＥＬＥＡＳＥＦＲＯＭＴＨ...     

培养的大鼠血管平滑肌细胞血管紧张素Ⅱ受体的基因表达及调节

在培养的自发性高血压大鼠（ＳＨＲ）和正常血压ＷＫＹ大鼠的主动动脉平滑肌细胞（ＡＳＭＣ）模型，应用Ｎｏｒｔｈｅｒｎ杂交和逆转录－聚合酶链反应（ＲＴ－ＰＣＲ）技术，分别检测ＡＳＭＣ中碱性成纤维细胞生长因子（ｈＦＧＦ）和血管紧张素Ⅱ（ＡＮＧⅡ）Ｉ型受体（ＡＴ１Ｒ）的基因表达。结果表明：ＳＨＲＡＳＭＣ中ｈＦＧＦ基因的基础表达和ＡＮＧⅡ刺激后的表达水平元旦明显高于ＷＫＹ大鼠；ｂＦＧＦ（１０ｎｍ／ｍｌ）对两种     

干扰素对人胃癌细胞IAP—2表达的调节

应用基因重组干扰素－α和－γ体外诱导三侏人胃癌细胞系ＳＧＣ７９０１，ＭＧＣ８０３和ＭＫＮ４５，ＡＢＣ－ＣＥＬＩＳＡ法测定诱导组和对照细胞表面免疫抑制酸性蛋白Ⅱ型的表达量。在基础培养条件下，三株细胞表达ＩＡＰ－２均呈低水平。低浓度（＜１０００ｕ／ｍｌ）ＩＦＮ－α或－γ反使其ＩＡＰ－２表达量显著减少。这些结果提示：（１）ＩＦＮ－α和－γ可能对胃癌细胞ＩＡＰ－２表达呈双向调节作用；（２）癌细胞ＩＡＰ－２     

Short colon variant

A one day old neonate with a short colon, associated exomphalos minor; bifid scrotum and ileovesical fistula is reported.     

A distinct variant of the Ehlers-Danlos syndrome

Two unrelated males presented a distinct syndrome, consisting mainly of mental retardation, short stature, wrinkled facies, curly and fine hair, scanty eyebrows and eyelashes, telecanthus, periodontitis, hypermobility of the joints, hyperextensibility and fragility of the skin, multiple nevi, papiraceous scars, bruisability, varicose veins, pectus excavatum, winged scapulae, pes planus and bilateral cryptorchidism. Since some features were typical of Ehlers-Danlos Syndrome (EDS), the clinical data were analyzed comparatively with the different types of EDS. The individualization of a distinct variant is concluded. Increased paternal age at the birth of both cases suggests a de novo dominant mutation.     

Another variant in the C 3 system

A variant band in the C 3 system has been found in four members of onc Norwcgian family. By direct comparison the band was found lo migrate anodally to all earlier describcd C 3 bands on high voltage agarose gel electrophoresis. It is highly probable that the band represents a new allele at the C 3 locus, C 3F1.2.
The C 3 content of all variant-containing sera of the family was found to be normal.     

Characterization of the myxoid variant of hibernoma

Hibernomas are rare benign neoplasms composed of brown adipose tissue. Although they were first mentioned in the literature almost a century ago, relatively few reports have documented their range of pathological features. Multivacuolated fat cells with small, central nuclei are typical features of hibernomas. Based on the nature of the stroma and the appearance of the multivacuolated cells, 4 categories of hibernomas are described: typical, lipoma-like, myxoid, and spindle cell. The myxoid variant is very rare. In this report, we present and characterize the spectrum of morphological features of the myxoid variant of hibernoma by describing the case of a 45-year-old white man who was referred to our hospital for treatment of an ovoid mass in the posterior segment of the right deltoid region. Histopathologic examination of the resected specimen revealed a multilobulated, tan-yellow, variegated tumor with a rubbery consistency that was separated by thick fibrous septa with interspersed collections of foamy histiocytes. The mass was initially diagnosed as schwannoma with degenerative changes, but workup revealed a myxoid variant of hibernoma. This report highlights recent advances that may help confirm the diagnosis and explain the differential diagnosis of this rare tumor. This is one of only a few cases of a myxoid variant of hibernoma reported in the literature.     

Multicentric contiguous variant of epithelioid angiosarcoma of the bone. A rare variant showing angiotropic spread

Epithelioid angiosarcoma of the bone is a rare tumor and is a diagnostic challenge. Here we present an autopsy case of a 62-year-old man with multifocal osteolytic lesions in the extremities and the pelvis. The initial diagnosis of a tibial biopsy was poorly differentiated adenocarcinoma. On the occasion of autopsy, a fungating thrombotic nodule was found at the anterior wall of the right atrium, and small hemorrhagic infarcts with tumor thrombi were found in the lung. Histologically, the above lesions were identical to the former tibial biopsy and they showed large eosinophilic epithelioid cells with irregular ovoid nuclei and prominent eosinophilic nucleoli. Rare intracytoplasmic lumina were identified. Immunohistochemically, the tumor cells were positive for cytokeratins (CAM5.2 and AE1/AE3), CD31, factor VIII-related antigen, and vimentin. This case showed angiotropic spread of the tumor only to the right atrium and the lung, with no solid mass in other organs. Multicentric epithelioid angiosarcoma of the bone is a pitfall in pathological diagnoses, especially if a strong radiological impression of metastatic carcinoma is provided. Therefore, pathologists should be aware of this rare variant.