一項研究發(fā)現(xiàn),有針對性地打擊一小群被認為促進了黑色素瘤的腫瘤細胞有可能幫助治療這種可能致命的皮膚癌。黑色素瘤常常產(chǎn)生含有各種遺傳類型的腫瘤細胞的腫瘤,。為了檢驗一個假說,,即這些腫瘤內的一小群具有遺傳相似性的細胞促進了黑色素瘤的生長,,Hinrich Abken及其同事使用了一種免疫療法瞄準了被認為是補充這種腫瘤的細胞,。這組作者向移植到小鼠的人類黑色素瘤注射了經(jīng)過改造的人類免疫細胞,這些細胞被改造成了能夠殺死含有兩種癌癥相關蛋白的黑色素瘤細胞,。這組作者發(fā)現(xiàn),,即便這些癌癥相關蛋白只裝飾了典型的黑色素瘤病灶的不到2%的黑色素瘤細胞,,以這兩種蛋白(而不是以其他蛋白)為靶標的免疫細胞在很大程度上讓這些腫瘤縮小并且在注射后的多于36周的時間里遏制了黑色素瘤。這組作者說,,這些免疫細胞很可能通過打開了參與程序性細胞死亡的酶從而毀滅了它們的目標細胞,。
這組作者報告說,盡管這些表面蛋白本身不太可能是這種腫瘤的關鍵分子成分,,這些蛋白標記了一小群可能作為黑色素瘤核心的腫瘤細胞,。這組作者提出,研發(fā)治療黑色素瘤的藥物的工作可能因為瞄準這一群腫瘤細胞而獲益,。(生物谷Bioon.com)
生物谷推薦英文摘要:
PNAS doi: 10.1073/pnas.1009069108
Eradication of melanomas by targeted elimination of a minor subset of tumor cells
Patrick Schmidta, Caroline Kopeckya, Andreas Hombacha, Paola Zigrinob, Cornelia Mauchb,c, and Hinrich Abkena,c,1
Proceeding on the assumption that all cancer cells have equal malignant capacities, current regimens in cancer therapy attempt to eradicate all malignant cells of a tumor lesion. Using in vivo targeting of tumor cell subsets, we demonstrate that selective elimination of a definite, minor tumor cell subpopulation is particularly effective in eradicating established melanoma lesions irrespective of the bulk of cancer cells. Tumor cell subsets were specifically eliminated in a tumor lesion by adoptive transfer of engineered cytotoxic T cells redirected in an antigen-restricted manner via a chimeric antigen receptor. Targeted elimination of less than 2% of the tumor cells that coexpress high molecular weight melanoma-associated antigen (HMW-MAA) (melanoma-associated chondroitin sulfate proteoglycan, MCSP) and CD20 lastingly eradicated melanoma lesions, whereas targeting of any random 10% tumor cell subset was not effective. Our data challenge the biological therapy and current drug development paradigms in the treatment of cancer.
<P><STRONG> 推薦會議:</STRONG></P>
<P><A title="" href="http://www.medsci.cn/z/rad-sci/Index.shtml" target=_blank><IMG border=0 src="http://www.bioon.com/biology/UploadFiles/201102/2011022317123138.jpg" width=500 height=84></A></P>
<A title="" href="http://www.medsci.cn/z/rad-sci/Index.shtml" target=_blank style="text-decoration:none"><FONT color=#000000><P>第一屆國際醫(yī)學影像和放射學新進展暨學術論著發(fā)表策略研討會 <BR>2011 Medical Imaging and Radiological Innovations Conference</P>
<P>會議時間:2011年3月25日--3月27日</P>
<P>會議地點:上海醫(yī)學院路復旦醫(yī)學院明道樓</P></FONT></A>