T Cell Receptor Vβ Repertoires of Angioimmunoblastic Lymphadenopathy-like T Cell Lymphoma

To elucidate the pathogenesis of angioimmunoblastic lymphadenopathy-like T cell lymphoma (AILD-T) we investigated the T cell receptor Vβ gene repertoires of four AILD-Ts and compared them with those of other histological types of lymphomas and three cases with reactive disorders. All lymphoma patients had rearrangement bands detected by Southern blot analysis. Only 1 of the 4 cases of AILD-T showed a single predominant usage of Vβ 20 gene by PCR with 20 different Vβ specific primers and the others had repertoires somewhat restricted but similar to reactive lesions. Subsequent sequencing of this PCR product revealed that only 2 of 7 clones were identical. These results suggest the monoclonal malignant cells in AILD-T are scant and that the infiltrating T cells show a reactive pattern. In the only AILD-T case with a single dominant Vβ usage, the relationships of this repertoire and lymphoma cells seems to be of some consequence.     

重油和沥青中饱和碳的定量估计

建立了较完整的估计重油和沥青中饱和碳浓度数方法，其中包括环烷桥头碳、环烷甲基取代碳、环烷烷基（≥Ｃ２）取代碳等。基于理论分析，建立了估计环间的桥链和各种平均结构参数的方法，包括平均芳环环核数和环烷环环核数、芳环和环烷环烷工取代度、单元片上芳环和环烷环数。从实验数据出发，提出了烷基链长分布的公式。     

Association analysis of CA repeat polymorphism of the endothelial nitric oxide synthase gene with essential hypertension in Japanese

The nitric oxide synthase (NOS) gene is thought to be associated with essential hypertension (EH), because NO is implicated in endothelium-mediated vasodilation. We investigated the possible association between the alleles of simple tandem repeat DNA polymorphism of the endothelial constitutive NOS (cNOS) gene and EH in Japanese subjects. In all, 100 patients with EH and 123 subjects with normal blood pressure were studied. Polymerase chain reaction was used to amplify the CA repeat site in the endothelial cNOS gene and alleles based on the CA repeat number were determined. The allele frequencies in the hypertensive group and normotensive group were then compared. Twenty-three alleles were identified in this study of Japanese subjects. The overall distributions of allele frequencies in the two groups were not significantly different. However, comparing the allele frequencies in the EH group without left ventricular hypertrophy (LVH) and the normotensive group, the overall distributions were significantly different (p = 0.019). The 33-repeat allele was found more frequently in the EH group without LVH than in the normotensive group (p = 0.000047, Odds ratio = 3.71). In conclusion, the 33-repeat allele of the endothelial cNOS gene is associated with EH without LVH, and may be a genetic marker of EH in Japanese subjects.     

男性不育症患者中YRRM2基因缺陷的研究

YRRM基因是控制精子生成与成熟的一个重要因素，一旦该基因缺陷，将会造成无精或少精。本研究对340例无精与少精患者的外周血标本进行了PCR基因扩增筛查，结果发现7例为该基因缺陷，占2％。证明YRRM2的缺陷也是造成中国人群男性不育的一个原因，从而可作为指导医生采用适当治疗方法的一个可靠指标。在实验过程中，采用直接加热白细胞提取基因组DNA，并以此作为模板对YRRM2基因进行扩增，既节省时间和经费，又保持良好的扩增效果，使之可用于临床医院作为常规检查。     

原发性肝癌HBV感染模式与AFP水平相关性研究

目的:探讨原发性肝癌(PHC)患者乙肝病毒(HBV)感染模式与血清甲胎蛋白(AFP)水平的关系。方法:应用酶免疫检测法(ELISA)、聚合酶链反应(PCR)及放射免疫技术分别测定100例原发性肝癌患者血清乙型肝炎病毒指标(HBV-M)及AFP。结果:100例PHC患者中,HBV-M阳性88例(88％),阴性12例(12％),HBV-M阳性者AFP水平高于阴性者147 ng/mL,二者有非常显著性意义(P<0.01),且HBV-M阳性者AFP升高(68.4％)的比例明显高于HBV-DNA阴性者(31.6％)(P<0.01)。PHC患者HBV感染模式分析中,HBsAg、HBeAb、HBcAb阳性和HBV-DNA阳性最多,为56例(63.6％),其次为HBsAg、HBeAg、HBcAb和HBV-DNA阳性,为9例(10.2％)。结论:HBV是原发性肝癌发生的重要原因,在PHC患者中,AFP升高与HBV感染、复制相关。     

The effect of supplementation with fish oil during pregnancy on breast milk immunoglobulin A, soluble CD14, cytokine levels and fatty acid composition

BACKGROUND: Breast milk contains many immunomodulatory factors (soluble CD14 (sCD14), IgA and cytokines) with the potential to influence infant immune development. OBJECTIVE: To determine if changes in breast milk omega-3 polyunsaturated fatty acid (n-3 PUFA) composition as a result of maternal dietary fish oil supplementation during pregnancy can modify levels of these immunological parameters in breast milk. METHOD: In a randomized controlled trial, 83 atopic women received either 4 g fish oil capsules (containing 3.7 g n-3 PUFA) (n = 40) or 4 g olive oil capsules (n = 43) from 20 weeks gestation until delivery. Breast milk was collected 3 days post-partum and fatty acids were analysed by gas liquid chromatography and IgA, sCD14 and cytokines (IL-5, IL-6, IL-10, TNF-alpha and IFN-gamma) were quantitated by ELISA or time resolved fluorescence (TRF). RESULTS: Omega-3 docosahexaenoic acid (DHA; 22:6n-3) and eicosapentaenoic acid (EPA; 20:5n-3) levels were significantly higher (P < 0.001) in breast milk from women supplemented with fish oil (n = 33, DHA mean 1.15%, SD 0.47% and EPA mean 0.16%, SD 0.07%) than in samples from the control group (n = 40, DHA mean 0.50%, SD 0.17% and EPA mean 0.05%, SD 0.02%). Breast milk arachidonic acid (AA; 20:4n-6) levels were significantly lower (P = 0.045) in the fish oil group (mean 0.55%, SD 0.12%) compared with the control group (mean 0.61%, SD 0.14%). Breast milk IgA was positively correlated with DHA (P = 0.046) and 22:5n-3 (P = 0.003), but inversely correlated with linoleic acid (LA; 18:2n-6) (P=0.034). Levels of sCD14 were also positively correlated with 22:5n-3 (P=0.009). Cytokines involved in IgA synthesis (IL-10 and IL-6) were also significantly correlated with both IgA and n-3 PUFA levels, although there were no differences in the levels of breast milk IgA, sCD14 or cytokines between study groups. CONCLUSION: Supplementation with fish oil during pregnancy significantly alters early post-partum breast milk fatty acid composition. omega-3 PUFA levels were positively associated with IgA and sCD14 levels, suggesting a relationship between fatty acid status and mucosal immune function.     

人源化抗体构建过程中假链的产生及应对策略

目的在人源化抗体构建过程中，采用方便、快捷的分子克隆手段。消除SP2／0内源性畸形轻链转录本以获得正确的轻链cDNA。方法在mRNA抽提时，不用常规的TRIZOL法抽提总RNA，而采用经腹腔培养。生长状态良好的杂交瘤细胞。用QIAGEN公司Oligotex Direct mRNA Purification Kit，将polyA^＋的mRNA富集。可有效减少畸变转录本的含量，提高功能型mRNA的丰度。利用polyA^＋RNA。采用RT-PCR，我们成功地克隆到了轻链可变区序列，序列分析证实读码框完全正确，属于轻链可变区基因。结果NCBI数据库BLAST显示。克隆的基因序列符合小鼠lg可变区特征，具有正确的CDR和FR功能区及VJ连接区。结论采用polyA^＋ mRNA富集技术，成功克隆获得阻断型抗人CD154 mAb（4F1）单克隆抗体的轻链、重链可变区基因，成功地消除了SP2／0内源性畸形转录本对免疫球蛋白功能性轻链基因的影响。     

子-母微量嵌合体基础上同胞间非T淋巴细胞去除HLA半相合造血干细胞移植一例

目的为扩大供者来源,探讨在子-母微量嵌合体基础上同胞间非T淋巴细胞去除(Non-TCD)HLA半相合造血干细胞移植的可行性。方法受者的原发病为慢性粒细胞白血病(CML)急性淋巴细胞病变,供者为其胞弟,供、受者HLA有3个抗原不同,经套式序列特异引物聚合酶链反应技术检测,供者微量嵌合体阳性。采用全身照射、司莫司汀、阿糖胞苷、环磷酰胺及兔源抗胸腺细胞球蛋白等对受者进行预处理;采用环孢素A、霉酚酸酯及甲氨蝶呤预防移植物抗宿主病(GVHD)。结果移植后受者的外周血中性粒细胞>0.5×109/L和血小板>20×109/L的时间分别为11、18d,骨髓检查显示增生活跃,粒细胞系、红细胞系形态和比例正常;1、2、3、6个月和1年时完全供者型嵌合>90%。术后发生Ⅱ度急性GVHD及慢性局限性GVHD,经调整免疫抑制治疗方案后缓解。受者现基本恢复正常生活。结论子-母微嵌合体阳性的HLA半相合同胞可作为Non-TCD造血干细胞移植的供者。