Analysis of the p21 gene in gliomas

The p21 gene encodes a cyclin dependent kinase inhibitor protein (p21) which has a tumor suppressive activity in a variety of tumor cell lines. Since, the p21 gene is up-regulated by the p53 tumor suppressor gene, which is frequently mutated in gliomas, acting therefore in the same control pathway, it constitutes a good candidate gene to be also inactivated in these tumors. To test this hypothesis, DNAs from 81 gliomas (48 glioblastomas, 11 anaplastic astrocytomas, 10 low-grade astrocytomas, 12 oligodendrogliomas and mixed gliomas), were investigated for mutations in the p21 coding sequence by denaturant gradient gel electrophoresis followed by sequencing. All these tumors have been previously screened for p53 mutations. Three different DNA variants were identified on codon 31 (17 cases), 27 (1 case) and 117 (1 case) and shown to be also present in matching constitutional DNA, suggesting they were polymorphisms. None of the tumors demonstrated a somatic mutation. No significant correlation between the presence of a p21 variant and the p53 mutation tumor status was observed. In conclusion, mutation in the p21 gene unlikely contributes to the development of gliomas.     

白细胞介素Ⅱ联合加温化疗治疗癌性腹腔积液

１９９５年始采用随机分组方法，比较白细胞介素Ⅱ与加温顺铂、５－氟尿嘧啶联合（治疗组）及单用顺铂、５－氟尿嘧啶（对照组）腹腔内灌注治疗癌性腹腔积液４３例，结果显示：治疗组有效率为９０．９％，对照组有效率为６１．９％，Ｐ＜０．０５。生存质量方面治疗组明显提高，Ｐ＜０．０５。两组毒副反应均较轻，Ｐ＞０．０５无显著性差异，结论：白细胞介素Ⅱ与加温顺铂、５－氟尿嘧啶联合腹腔灌注治疗癌性腹腔积液，可能有协同、相加作用，是有效、简便、毒副反应小的治疗手段     

鹿角治疗乳癖症的研究Ⅰ.鹿角提取物的抗炎作用

马鹿鹿角提取物能抑制右旋糖酐和二甲苯所致急性渗出性炎症，对慢性肉芽组织增生性炎症也有明显的抑制作用，对组胺、５ＨＴ、ＰＧＥ１引起的毛细血管通透性增强有明显的抑制作用     

Analysis of essential oil from rhizoma Zingiberis by GC-MS]

Sixty-six chemical components of the essential oil from Rhizoma Zingiberis were identified. The contents of these components were determined by GC-MS. The major components were camphene, beta-phellandrene and 1,8-cineole.     

Effect of rotundine on gastric acid and pepsin activity in rats]

A test was made on the effect of rotundine on the secretion of gastric acid and pepsin activity in rats. Compared with the control group, rotundine(> or = 17.1 mg/kg) inhibited gastric acid and decreased secretion of gastric juice(P < 0.01), but had no influence on pepsin activity. There was a negative relationship between total acidity and pH of gastric juice (r = -0.9818).     

Bcl-2基因及其家族Bax,Bcl-Xl和Fas/Apo-l,P16的检测在急性白血病中的临床意义

目的：为了解白血病凋亡正、负反馈网络中的问题与临床的关系，研究了抑制凋亡的基因Ｂｃｌ２及其家族Ｂａｘ，ＢｃｌＸｌ以及诱导凋亡的基因Ｆａｓ／Ａｐｏ１，Ｐ１６。方法：采用细胞免疫组化，ＷｅｓｔｅｒｎＢｌｏｔ，以及ＮｏｒｔｈｅｒｎＢｌｏｔ的方法。结果：发现在ＡＭＬ组和ＡＬＬ组，Ｂｃｌ２抗原表达均明显高于正常（Ｐ＜００１），回顾性分析ＡＭＬＣＲ组其明显低于ＮＲ组（Ｐ＜００１）。蛋白印迹ＣＲ组Ｂｃｌ２表达虽然降低，但和ＮＲ组比较无统计学意义（Ｐ＞００５）。Ｂｃｌ２ｍＲＮＡ的表达ＣＲ组明显低于ＮＲ组（Ｐ＜０．０１）。Ｂａｘ的表达在免疫组化中白血病明显低于正常（Ｐ＜００１），但在ＣＲ组与ＮＲ组，免疫组化，蛋白印迹，ＢａｘｍＲＮＡ的表达，均无差异（Ｐ＞００５）。但ＢｃｌＸｌｍＲＮＡ的表达两组间有明显差异（Ｐ＜００１）。Ｆａｓ／Ａｐｏ１的表达为白血病组低于正常（Ｐ＜００１），但在ＣＲ与ＮＲ组中，免疫组化与蛋白印迹分析均无统计差异（Ｐ＞００５）。Ｐ１６的表达为白血病组低于正常组（Ｐ＜００１），但在ＣＲ组与ＮＲ组中无统计学意义（Ｐ＞００５）。结论：Ｂｃｌ２抗原以及Ｂｃｌ２ｍＲＮＡ，Ｂｃｌ     

人His6-IFNγ/TNFβ(His6γ-TNFNβ)融合蛋白(包涵体)的分离、纯化与复性研究

应用pET28(含T_7lac启动子和His6-tag)质粒,将人γTNFβ融合基因与之组建成pETγLT表达质粒,并转化于E.coliBL21(DE3).本文对pETγLT/ BL21(DE3)工程菌的His6-γTNFβ重组产物进行了诱导表达,分离纯化的研究.结果表明,该工程菌用LB培养基在37℃扩增至OD_(590)为0.5左右,加IPTG(终浓度为1mmol/L)诱导5小时,此时His6-γTNFβ的表达量可占菌体总蛋白的45%.重组产物绝大多数以IBs形式存在于菌体中.工程菌经反复超声破碎、高速离心,得IBs粗制品后,再经含2mol/L脲的缓冲液洗涤可得到相对纯净的IBs.然后用7mol/L脲变性溶解IBs,离心取上清,进行Ni~(2 )-Sepharose 6B柱一步法亲和层析,可得到电泳纯度为95%的His6-γTNFβ,经稀释复性和用凝血酶切去His6-tag的产物,其细胞毒活性为(1.2～2.0)×10~7U/mgp,抗病毒活性为(6.0～6.6)×10~6U/map.     

LOSS OF HETEROZYGOSITY ON CHROMOSOME 17p13.3 IN OVARIAN CANCER AND CERVICAL CANCER

ＣａｒｃｉｎｏｇｅｎｅｓｉｓｃｏｎｓｉｓｔｓｏｆｍｕｌｔｉｐｌｅｑｕａｌｉｔａｔｉｖｅｌｙｄｉｆｆｅｒｅｎｔｓｔｅｐｓｉｎｗｈｉｃｈａｃｃｕｍｍｕｌａｔｉｏｎｏｆＤＮＡａｌｔｅｒａｔｉｏｎｏｃｕｒｓａｎｄｃｒｉｔｉｃａｌｅｖｅｎｔｓ，ｉｎｖｏｌｖｉ...     

恶性肿瘤患者化疗前后外周血淋巴细胞凋亡的变化

为了探讨肿瘤化疗机理，作者采用流式细胞术单参数分析方法，检测了４５例恶性肿瘤患者化疗前后外周血细胞的凋亡（Ａｐｏ）、Ｓ期细胞比率（ＳＰＦ）和增殖指数（ＰＩ）的变化。结果表明，肿瘤患者血细胞Ａｐｏ水平明显高于正常对照（Ｐ＜０．０１），化疗结束时进一步升高（Ｐ＜０．０１），化疗后１个月又恢复到化疗前的水平。肿瘤患者的ＳＰＦ和ＰＩ均显著高于正常对照（Ｐ＜０．０１），化疗结束时明显减低，ＰＩ尤为显著（Ｐ＜０．０１），并持续到化疗后１个月。从而可见，化疗使患者血细胞Ａｐｏ呈“一过性”增高，肿瘤的化疗机制主要是化疗药物使细胞增殖活性减低，细胞聚积在Ｇｏ／Ｇ１期，同时药物诱导细胞凋亡增加，达到治疗肿瘤的目的