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肿瘤标志物是一类特异分布于肿瘤细胞表面的分子,这些分子种类较多、功能多样.大多数均与肿瘤细胞的增殖与分化有一定的关系.目前,部分肿瘤标志物可以作为重要的靶分子用于肿瘤的早期诊断.因此,肿瘤表面标志物的不断发现对于肿瘤的早期诊断与治疗具有重要的意义. 相似文献
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专家简介:方敏,女,中国科学院微生物研究所,研究员,自然杀伤细胞研究组组长,中国科学院遗传与发育生物学研究所分子免疫遗传学专业,博士,美国福克斯肿瘤研究中心,博士后,专长于利用自然杀伤细胞(NK细胞)对抗传染病、肿瘤等研究,并在此领域有多项重大发现,首次发现NK细胞功能随小鼠年龄的增长而下降并直接导致小鼠丧失抵抗病毒的能力发现NK细胞活化受体CD94-NKG2E识别并特异性杀伤鼠痘病毒感染的细胞以控制病毒感染, 相似文献
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MCM(微小染色体维持蛋白)是DNA复制允许因子之一,由六个保守亚基组成六聚体,表现复制型DNA解旋酶的活性.该分子参与细胞复制过程中DNA复制起始的调控.自1992年发现MCM分子以来,在细胞生物学、遗传学和蛋白分子生物学不同领域中对其进行了广泛而深入的研究:一方面研究MCM如何参与细胞DNA复制起始和细胞增殖的;另一方面研究细胞异常增殖时MCM5蛋白的表达可作为肿瘤细胞发生的标记物.MCM5蛋白已成为研究细胞生命过程以及早期诊断肿瘤细胞的一类重要分子. 相似文献
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Liu Y Chen L Peng SY Chen ZX Hoang-Vu C 《Journal of Zhejiang University. Science. B》2005,6(9):913-918
Objectives: To explore the mechanism of development and aggressiveness in gastric carcinomas by investigating the expression and role of CD97 and its cellular ligand CD55 in gastric carcinomas. Methods: Tumor and corresponding normal mucosal tissue, collected from 39 gastric carcinoma patients, were examined by immunohistochemistry and RT-PCR for the expression of CD97 and CD55. Results: CD97stalk was strongly stained on scattered tumor cells or small tumor cell clusters at the invasion front of gastric carcinomas. The expression of CD97stalk was frequently observed in tumors of stage Ⅰ and T1 gastric carcinoma patients. The expression of CD97stalk between Stage Ⅰ and Stage Ⅱ, Ⅲ, Ⅳ specimens showed significant difference (P<0.05), between T1 and T2, T3, T4 specimens also showed significant difference (P<0.05). Specimens with tumor invasion depth limited in mucosa of T 1 specimens showed higher positive CD55 expression than specimens with the same tumor invasion depth in T2, T3, T4 specimens, the expression of CD55 between T1 and T2, T3, T4 specimens was significantly different (P<0.05).There was strong correlation between the distribution patterns of CD97stalk and CD55 on tumor tissues (r=0.73, P<0.05). Signet ring cell carcinomas frequently contained strong CD97stalk and CD55-staining. Conclusions: Our results suggest that CD97stalk is probably involved in the growth, invasion and aggressiveness of gastric carcinomas by binding its cellular ligand CD55. CD97stalk and CD55 could be useful as molecular markers for prognosis and therapy of gastric carcinoma patients. 相似文献
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一个由荷兰、德国、美国研究人员组成的小组宣布,他们结合化疗与热疗这两种治疗肿瘤的方法开发出智能“化疗炸弹”疗法,有望解决以往化疗疗法“敌我不分”的缺点,从而有的放矢地攻击肿瘤细胞。研究人员将化疗药物包裹在微小的脂肪粒中制成这种“化疗炸弹”, 相似文献