第5期马 芳，等：肿瘤，一个发育生物学问题437
激淋巴细胞增殖和抑制肿瘤细胞生长。有人将白血病细胞注入小鼠胚胎的胎盘得到了具有嵌合的造血系统的正常小鼠。
3 结 语
尽管我们已经步入了生命科学时代，然而我们对生命的探索是远远不够的。恶性肿瘤是一种特殊的疾病，与我们的健康和生命休戚相关，人们期望利用新的科学思维方法来重新理解恶性肿瘤的发病机理及其生物学行为，也渴望找到生命的真正含义。我们相信从发育生物学的视角来思考肿瘤和研究肿瘤，无论对个体发育的探索，还是对恶性肿瘤的认知都会有更深入的认识和收获。
从发育生物学的角度认识肿瘤，以及对胚胎与肿瘤相互作用的进一步研究有利于我们深入地理解胚胎和肿瘤两种“正-邪”生命现象的内涵，拓展和补充“肿瘤的胚胎源性”概念。同时也有助于人们从生命现象中去寻求认识肿瘤、征服肿瘤的新“曙光”。这个交叉领域的研究对于解析生命现象本身也提供了新的思维方法和探索方向，为肿瘤细胞的分化和表型研究提供了实验理论和技术平台。
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