美国弗雷德哈钦森癌症研究中心(Fred Hutchinson Cancer Research Center)发现
microRNA 分子——一种有效调控基因表达的重要分子——为癌细胞所释放并且进入血液循环中,这使得这类小分子可以被开发为一种新的生物标记用于
检测最早期癌症。有关结果发表在在7 月28 日的 Proceedings of the National Academy of Sciences 上。
华盛顿大学医学院、美国西雅图退伍军人Puget Sound保健中心参与了该研究。研究项目得到国立癌症研究所、太平洋卵巢癌研究协会优秀特殊研究项
目、太平洋西北前列腺癌优秀特殊研究项目、血液学优秀研究项目中心以及Paul Allen 基金会共同资助。
生物谷推荐原始出处: PNAS published ahead of print July 30, 2008,doi:10.1073/pnas.0804549105 Circulating microRNAs as stable blood-based markers for cancer detection Patrick S. Mitchell†,‡, Rachael K. Parkin†,‡, Evan M. Kroh†,‡, Brian R. Fritz†,§, Stacia K. Wyman†, Era L. Pogosova-Agadjanyan¶, Amelia Peterson†, Jennifer Noteboom‖, Kathy C. O'Briant††, April Allen††, Daniel W. Lin‖,††,‡‡, Nicole Urban††, Charles W. Drescher††, Beatrice S. Knudsen††, Derek L. Stirewalt¶, Robert Gentleman††, Robert L. Vessella‖,‡‡, Peter S. Nelson†,¶, Daniel B. Martin†,§§, and Muneesh Tewari†,¶,¶¶ AbstractImproved approaches for the detection of common epithelial malignancies are urgently needed to reduce the worldwide morbidity and mortality caused by cancer. MicroRNAs (miRNAs) are small (≈22 nt) regulatory RNAs that are frequently dysregulated in cancer and have shown promise as tissue-based markers for cancer classification and prognostication. We show here that miRNAs are present in human plasma in a remarkably stable form that is protected from endogenous RNase activity. miRNAs originating from human prostate cancer xenografts enter the circulation, are readily measured in plasma, and can robustly distinguish xenografted mice from controls. This concept extends to cancer in humans, where serum levels of miR-141 (a miRNA expressed in prostate cancer) can distinguish patients with prostate cancer from healthy controls. Our results establish the measurement of tumor-derived miRNAs in serum or plasma as an important approach for the blood-based detection of human cancer. |
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