新一期英国《自然》杂志刊登报告说,患有前列腺癌的实验鼠在接受激素治疗后常出现一系列反应,最终导致癌症更严重地复发,而在这个过程中一种免疫细胞的“叛变”扮演了重要角色。
美国加利福尼亚大学等机构的研究人员报告说,由于前列腺癌细胞的生长需要睾丸激素,因此目前常用其他激素抑制睾丸激素的作用,以控制前列腺癌发展。这一方法可延长患者数月或数年的生命,但随后常出现更严重的复发。
研究人员经对患病实验鼠分析发现,导致上述现象的原因是激素疗法可引起前列腺发炎,而炎症又引来免疫细胞B细胞,原本帮助身体和疾病斗争的B细胞这时释放大量淋巴毒素,使前列腺癌细胞的生长不再需要睾丸激素,于是癌症复发并更难治疗。
如果设法去除实验鼠体内的B细胞以及相应的淋巴毒素,可将实验鼠癌症复发的间隔延长3至4周,这大约相当于人类的2至3年。
研究人员说,免疫细胞“叛变”导致前列腺癌复发是一个全新发现。(生物谷Bioon.com)
生物谷推荐原文出处:
Nature doi:10.1038/nature08782
B-cell-derived lymphotoxin promotes castration-resistant prostate cancer
Massimo Ammirante1,4, Jun-Li Luo2,4, Sergei Grivennikov1, Sergei Nedospasov3 & Michael Karin1
Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology and Cancer Center, School of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0723, USA
Scripps Research Institute-Florida, Department of Cancer Biology, 130 Scripps Way, Jupiter, Florida 33458, USA
Laboratory of Molecular Immunology, Engelhardt Institute of Molecular Biology, 119991, Moscow, Russia
These authors contributed equally to this work.
Laboratory of Gene Regulation and Signal Transduction, Department of Pharmacology and Cancer Center, School of Medicine, University of California, San Diego, 9500 Gilman Drive, La Jolla, California 92093-0723, USA
Scripps Research Institute-Florida, Department of Cancer Biology, 130 Scripps Way, Jupiter, Florida 33458, USA
Laboratory of Molecular Immunology, Engelhardt Institute of Molecular Biology, 119991, Moscow, Russia
These authors contributed equally to this work.