第九章 肿瘤遗传异质性.PDF
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HEREDITAS (Beijing) 2012 年*月, 34(*):
ISSN 0253-9772
肿瘤遗传异质性
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杨壹羚 ,褚嘉祐 ,王明荣
1. 天津医科大学附属肿瘤医院乳腺病理室,教育部乳腺癌防治重点实验室,天津市肿瘤防治重点实验室,
天津 300060 ;
2. 中国医学科学院医学生物学研究所,昆明 658110 ;
3. 中国医学科学院肿瘤医院肿瘤研究所,北京 100021
摘要:尽管大多数自发性肿瘤源于单细胞,但人们逐渐认识到个体肿瘤的内部存在异质性,这种差异涉及分
化程度、细胞增殖率、侵袭和转移能力及治疗反应等众多方面。分子生物学研究也证实肿瘤演进过程中不断
产生新的突变,为肿瘤内部存在异质性增加了更有力的佐证。文章综述了关于肿瘤遗传异质性研究的主要进
展。鉴于遗传异质性分析可为揭示肿瘤细胞的产生、扩散、转移的时间段提供重要信息,文章以瘤内异质性
为主线,列举了遗传异质性存在的实验依据;阐述了遗传多样性在人类个体肿瘤发展进化史中的研究价值;
介绍了遗传异质性产生的两种模式,包括肿瘤干细胞模型和克隆进化模型;总结了遗传异质性在肿瘤转移、
治疗中的重要临床意义。文章最后展示了常用的遗传异质性的研究方法,包括特定基因的分析方法和基于基
因组水平的方法,并对各自的优缺点进行了分析。
关键词:肿瘤;遗传;异质性
Tumor genetic heterogeneity
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YANG Yi-Ling , CHU Jia-You , WANG Ming-Rong
1. Department of Breast Cancer Pathology and Research Laboratory, Key Laboratory of Breast Cancer Prevention
and Therapy (Ministry of Education), Tianjin Medical University Cancer Institute Hospital, Tianjin 300060,
China;
2. Institute of Medical Biology, Peking Union Medical College and Chinese Academy of Medical Sciences,
Kunming 650118, China;
3. Cancer Institute (Hospital), Peking Union Medical College and Chinese Academy of Medical Sciences, Beijing
100021, China
Abstract: Although the majority of spontaneous tumors derive from a single cell, people have come to realize
intra-tumor heterogeneity of individual tumors. Human cancers frequently display substantial difference in
phenotypic features, such as the degree of differentiation, cell proliferation rate, invasion and metastatic potential,
response to therapy and many other aspects. Molecular biology studies have confirmed the occurrence of new
mutations during the process of tumor progression, which provide more powerful evidences to show the existence of
intra-tumor genetic heterogeneity. This review will focus on recent major a
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