導(dǎo)讀:美國西南醫(yī)學(xué)中心的研究人員最近發(fā)現(xiàn)了一條通過靶向KRAS基因治療肺癌的新途徑。KRAS基因是人類癌癥中最常見的突變基因之一,也是很難成功進(jìn)行靶向治療的一個基因。
之前研究表明KRAS基因的編碼產(chǎn)物K-Ras會影響細(xì)胞分裂,因此KRAS基因發(fā)生突變會導(dǎo)致正常細(xì)胞出現(xiàn)增殖失控從而發(fā)生癌變。
突變的KRAS不僅能夠促進(jìn)腫瘤生長,還會幫助肺癌細(xì)胞存活。但是目前仍然沒有抑制突變KRAS的有效的臨床用藥,因此開發(fā)有效的臨床靶向治療藥物得到了許多研究的關(guān)注。
在該研究中研究人員對肺癌中的KRAS進(jìn)行了研究,發(fā)現(xiàn)ACSL3介導(dǎo)的KRAS活性對于肺癌細(xì)胞存活至關(guān)重要,抑制ACSL3就會引起肺癌細(xì)胞死亡。
研究人員發(fā)現(xiàn)ACSL3的酶活性是突變的KRAS基因促進(jìn)肺癌形成所需要的一個重要條件,進(jìn)一步研究表明ACSL3的催化底物--脂肪酸在肺癌中扮演重要角色。
研究人員表示:這些結(jié)果非常重要。大約30%的肺癌病例中都存在KRAS基因突變,并且KRAS基因突變還與癌癥的侵襲性以及治療抵抗都存在相關(guān)性,除此之外攜帶突變的病人其預(yù)后也很差。根據(jù)美國國家癌癥研究所的統(tǒng)計(jì)數(shù)據(jù),肺癌仍然是美國癌癥相關(guān)死亡的頭號原因。
目前急需發(fā)現(xiàn)更多靶點(diǎn)來抑制癌細(xì)胞的脂質(zhì)代謝,從而開發(fā)靶向治療方法,而該研究發(fā)現(xiàn)ACSL3在肺癌中的重要性恰好填補(bǔ)了這一需求。文章第一作者Dr. Mahesh S. Padanad這樣說道。(來源是生物谷)
英文原文:
doi:10.1016/j.celrep.2016.07.009
Fatty Acid Oxidation Mediated by Acyl-CoA Synthetase Long Chain 3 Is Required for Mutant KRAS Lung Tumorigenesis
Mahesh S. Padanad1, 2, 12, Georgia Konstantinidou1, 2, 12, 13, Niranjan Venkateswaran1, 2, Margherita Melegari2, Smita Rindhe1, 2, Matthew Mitsche3, 4, Chendong Yang5, Kimberly Batten6, Kenneth E. Huffman7, Jingwen Liu8, Ximing Tang9, Jaime Rodriguez-Canales9, Neda Kalhor9, Jerry W. Shay6, John D. Minna1, 7, Jeffrey McDonald4, Ignacio I. Wistuba10, 11, Ralph J. DeBerardinis3, 5, Pier Paolo Scaglioni
KRAS is one of the most commonly mutated oncogenes in human cancer. Mutant KRAS aberrantly regulates metabolic networks. However, the contribution of cellular metabolism to mutant KRAS tumorigenesis is not completely understood. We report that mutant KRAS regulates intracellular fatty acid metabolism through Acyl-coenzyme A (CoA) synthetase long-chain family member 3 (ACSL3), which converts fatty acids into fatty Acyl-CoA esters, the substrates for lipid synthesis and β-oxidation. ACSL3 suppression is associated with depletion of cellular ATP and causes the death of lung cancer cells. Furthermore, mutant KRAS promotes the cellular uptake, retention, accumulation, and β-oxidation of fatty acids in lung cancer cells in an ACSL3-dependent manner. Finally, ACSL3 is essential for mutant KRAS lung cancer tumorigenesis in vivo and is highly expressed in human lung cancer. Our data demonstrate that mutant KRAS reprograms lipid homeostasis, establishing a metabolic requirement that could be exploited for therapeutic gain.
肺癌如何治療?肺癌的治療藥物有:五味沙棘散、西黃膠囊、鴉膽子油口服乳液、貞芪扶正膠囊、紫龍金片。
詳情請致電我們的客服垂詢:400-101-6868。如需購買五味沙棘散、西黃膠囊、鴉膽子油口服乳液、貞芪扶正膠囊、紫龍金片,可到臨近門店。廣西南寧分店地址為:南寧市青秀區(qū)雙擁路9-8號明湖花園B座一層7號(廣西醫(yī)科大學(xué)正門對面)。