血清同工铁蛋白酶联免疫吸附测定及其临床观察

用酶联免疫吸附测定法(ELISA)观察了96例正常人,11例原发性肝细胞肝癌(HCC)、28例乳癌(BC)、31例肺癌(LC)、26例乳腺纤维瘤(BF)、11例肺炎(LF)及11例肺结核(TB)患者的血清同工铁蛋白(Serum isoferritin,SIF)水平。结果显示:正常人与HCC、BC、LC、BF及LF患者之间的SIF水平存在非常显著差异(P<0.01或P<0.001),在上述各类疾病中恶性肿瘤与相应组织的非癌性疾病患者之间的SIF水平也呈现非常显著的差异(BC与BF间、LC与LF间的P<0.01,LC与TB间的P<0.001)。SIF对检测HCC、LC及BC有较高的灵敏度,对鉴别这些恶性肿瘤具有重要价值。     

猪血清胸腺因子免疫活性的测定

根据哺乳动物循环血液中所含有的血清胸腺因子(STF)能使θ-阴性的玫瑰花瓣状形成细胞(RFC~-)转变成RFC~+,同时提高其对抗θ抗原血清的代用品硫唑嘌呤的敏感性的原理,采用成熟的BALB/C品系小鼠,经摘去胸腺后的鼠脾脏淋巴细胞和绵羊红细胞(SRBC)之间,在STF和硫唑嘌呤同时共存的条件下具有抑制玫瑰花结形成的作用,从而建立了对哺乳动物循环血液中的STF(九肽)的超微量生物活性测定方法。用本方法对猪血清和血浆的检测结果,其活性滴度分别为1:512、1:1024。     

Accelerated Appearance of Skin Tumors in Hairless Mice by Repeated UV Irradiation with Initial Intense Exposure and Characterization of the Tumors

Skin tumors were produced on the back of hairless mice, HOS (HR/De), by exposure to ultraviolet B light (UVB, 290–320 nm) with 4 different protocols. The first tumors appeared earlier (in 10 weeks in group I and 7 weeks in group III) when initial intense exposure was given, followed by repeated lower-level exposures, than when the mice were exposed to the repeated UV only (in 16 weeks both in group II and group IV). All mice developed skin tumors earlier in the groups given the repeated UV exposures three times a week than in the groups given the exposures twice a week. Most of the skin tumors produced by the UVB exposure were histologically malignant, being transplantable to nude mice, and the cultured cells grown from the tumors were capable of producing tumors when injected into nude mice. The accelerated development of skin tumors by initial intense exposure and short intervals of repeated exposure observed in this study may have implications for humans who expose themselves to intense sunbathing and UV tanning (burning) by fluorescent sun lamps.     

多抗甲素对人NK细胞活性的作用机理研究

作者应用单细胞细胞毒试验及形态学观察，研究多抗甲素（ＰＡＡ）对人体自然杀伤（ＮＫ）细胞活性的作用机理。结果表明：ＰＡＡ能增强食道癌患者淋巴细胞（ＰＢＬ）明显低下的结合率（Ｂ％）和杀伤率（Ｋ％），也可增强正常人ＰＢＬ的Ｋ％，但对正常人ＰＢＬ的Ｂ％无影响。形态学观察发现：与靶细胞结合的ＰＢＬ除大颗粒ＰＢＬ外，尚有普通的非颗粒ＰＢＬ，结合的靶细胞损伤首先表现为线粒体肿胀、空泡变，然后核固缩，核膜损伤，细胞严重空泡变性等，偶见靶细胞与自然杀伤细胞结合部质膜破损的现象。经ＰＡＡ预处理的靶效细胞结合的形态改变无明显差异，但食道癌组的杀伤作用出现较早，且明显增强。     

造血系统恶性肿瘤患者血清sIL—2R检测的临床意义

使用ＥＬＩＳＡ双抗夹心法对临床４３例造血系统恶性肿瘤患者及２０例健康体检人员的血清ｓＩＬ－２Ｒ进行检测，并对ＡＬＬ和ＡＮＬＬ复发与未复发患者的血清ｓＩＬ－２Ｒ水平进行了比较分析。实验结果表明，血清ｓＩＬ－２Ｒ水平的升高是造血系统恶性肿瘤的重要标志之一；测定血清ｓＩＬ－２Ｒ水平对造血系统恶性肿瘤的辅助诊断、疗效观察及预后估计具有重要意义。     

Effects of hemorrhagic shock on endotoxemia and its molecular mechanism

AlthoughtherearegrowingevidencesindicatlugthatonlyweakendotoxemlaexistsintheearlystageafterhemorrhagicshockinhumanbeingsoranirnalsLI-3,antagonistsagainstendotoxinssuchasbacterlcldal/permeablllty--lucreproteinf'j,polymyxinBL4'andlactuloseL',exertsignificantprotectiveeffectsonthevictimsinshock.Thisseemsthatbacterlalendotoxinsplayanimportantroleinthedevelopmentofhemorrhagicshock.However,itremainsunclarifiedwhethertheroleofendotoxinsinshockisrelatedtotheincreaseofanIndividual'ssensitivitytoendot…     

肝病患者肝组织中丙型肝炎病毒感染的初步研究

采用直接酶标记法对174例慢性肝炎、重症肝炎和肝癌组织中的HCV抗原进行了检测,HCV 抗原的检出率分别为10.71％、8.10％和2.68％。表明在我国慢性和重症肝病中存在HCV的感染。通过对HCV与HBV 感染关系的研究,发现肝内HBV 标志阳性和阴性者HCV抗原的检出率无明显差异,说明HCV感染与HBV感染之间似无明显关系。     

Collagen synthesis activities of chondrocytes from histologically distinct zones of chick embryo tibia

Monolayer cultures of 12-day chick embryo chondrocytes from the regions of dividing (zone 1), elongated (zone 2), and hypertrophied (zone 3) chondrocytes in the tibial cpiphyseal growth plate were analyzed for their capacity to synthesize types II, IX, X, and XI collagens. Synthesis of types II and IX collagens was markedly elevated in the zone 2 culture, while type X collagen synthesis was maximal in zone 3. Type XI collagen was synthesized at low rates in all cultures, with some elevation of its rate in zones 2 and 3. In terms of mol percent of total collagen synthesis, types II and IX collagens decreased from zone 1 to zone 3, while type X collagen increased progressively. Thus, the composition of the extracellular collagens produced by the different zones changed markedly during chondrocyte differentiation. In addition, type X collagen was released exclusively into the culture medium, whereas type XI collagen was retained in the extracellular cell-associated matrix. In contrast, types II and IX collagens were found in both the culture medium and the cell matrix pools. Although types II and IX collagens showed similar changes during differentiation, the synthetic molar ratios of these two collagens varied from 3 to 18 in different cultures, suggesting that the synthesis of these two products is not tightly coupled in these cells.     

人乳头瘤病毒16型DNA转化人胚肺细胞的实验研究

人乳头瘤病毒(HPV)的16,18,31,33型等与宫颈癌的发病有关,其中HPV16与宫颈癌关系密切。为进一步研究HPV16的致癌性,我们用克隆的HPV16 DNA(2μg/10~5细胞)转染体外培养的人胚肺细胞,并进行了细胞存活时间、血清依赖性、着壁依赖性、间接免疫酶检测、HPV16 DNA、同源序列检测、染色体核型等生物学的研究。结果表明,转染细胞存活时间延长、在软琼脂培养基中形成集落、HPV16特异抗原得以表达、HPV16 DNA的同源序列存在于细胞中。表明本实验用HPV16DNA转染的人胚肺细胞具备转化细胞的某些特征,HPV16有使人胚肺细胞转化的作用。     

Increased in vitro uptake of the complement C3b in the serum of patients with Guillain-Barré syndrome, myasthenia gravis and dermatomyositis

To examine the role of complement in certain autoimmune neuromuscular diseases, we used an in-vitro quantitative complement uptake assay that allows measurement of the capacity of patients' sera to deposit fragments of the third complement component onto sensitized targets. C3 uptake was significantly higher in patients with active dermatomyositis, Guillain-Barré syndrome and myasthenia gravis, compared to inclusion body myositis and controls. The in-vitro C3 uptake assay supports the role of C3b neoantigen and Membranolytic Attack Complex deposition in the target tissues and may be a useful tool to monitor disease activity in patients with complement-mediated neurological disorders.