3月19日,,日本名古屋大學(xué)教授吉川史隆率領(lǐng)的研究小組說,,他們利用特殊裝置產(chǎn)生的等離子體照射卵巢癌細(xì)胞,,在不傷害正常細(xì)胞的情況下,,殺死了惡性細(xì)胞。相關(guān)論文發(fā)表在《應(yīng)用物理快報》(Applied Physics Letters)上,。
等離子體是由部分電子被剝奪后的原子及原子被電離后產(chǎn)生的正負(fù)電子組成的離子化氣體狀物質(zhì),,廣泛存在于宇宙中。通常,,在大氣中產(chǎn)生的等離子體是高溫的,,但是研究小組開發(fā)出了在大氣中也能產(chǎn)生低溫等離子體的裝置。利用這種裝置產(chǎn)生的等離子體照射培養(yǎng)皿中的癌細(xì)胞,,在不產(chǎn)生炎癥的情況下,,癌細(xì)胞會出現(xiàn)凋亡。
研究人員用等離子體照射腫瘤約10分鐘,,70%的卵巢癌細(xì)胞就死亡了,,由于不發(fā)生炎癥,周圍的細(xì)胞也不受損害,,只有癌細(xì)胞會死亡,。另外,向正常的細(xì)胞照射等離子體,,死亡的細(xì)胞卻很少,,幾乎沒有影響。
吉川史隆說:“現(xiàn)在治療癌癥主要依靠手術(shù),、放療和化療,,但是等離子體有可能成為第四大治療方法。對卵巢癌以外的癌癥也有望產(chǎn)生效果,。”今后,,研究小組準(zhǔn)備進(jìn)一步研究照射等離子體引起細(xì)胞凋亡的詳細(xì)機制。(生物谷Bioon.com)
doi:10.1063/1.3694928
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Selective killing of ovarian cancer cells through induction of apoptosis by nonequilibrium atmospheric pressure plasma
Sachiko Iseki1, Kae Nakamura, Moemi Hayashi, Hiromasa Tanaka, Hiroki Kondo, Hiroaki Kajiyama, Hiroyuki Kano, Fumitaka Kikkawa, and Masaru Hori
Two independent ovarian cancer cell lines and fibroblast controls were treated with nonequilibrium atmospheric pressure plasma (NEAPP). Most ovarian cancer cells were detached from the culture dish by continuous plasma treatment to a single spot on the dish. Next, the plasma source was applied over the whole dish using a robot arm. In vitro cell proliferation assays showed that plasma treatments significantly decreased proliferation rates of ovarian cancer cells compared to fibroblast cells. Flow cytometry and western blot analysis showed that plasma treatment of ovarian cancer cells induced apoptosis. NEAPP could be a promising tool for therapy for ovarian cancers.