Isotope Tracing of Human Clear Cell Renal Cell Carcinomas Demonstrates Suppressed Glucose Oxidation In Vivo.

Isotope Tracing of Human Clear Cell Renal Cell Carcinomas Demonstrates Suppressed Glucose Oxidation In Vivo.
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人透明细胞肾细胞癌的同位素追踪显示体内抑制了葡萄糖氧化。

DOI:
10.1016/j.cmet.2018.07.020
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发表时间:
2018-11-06
期刊:
影响因子:
29
通讯作者:
Maher EA
Maher EA
中科院分区:
生物学1区
文献类型:
--
作者:
Courtney KD;Bezwada D;Mashimo T;Pichumani K;Vemireddy V;Funk AM;Wimberly J;McNeil SS;Kapur P;Lotan Y;Margulis V;Cadeddu JA;Pedrosa I;DeBerardinis RJ;Malloy CR;Bachoo RM;Maher EA

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透明细胞肾细胞癌(ccRCC)是最常见的人类肾癌。组织学和分子分析表明,ccrcc显著改变了代谢。最近对肺癌和颅内恶性肿瘤的人类研究表明,在三羧酸(TCA)循环中,碳水化合物氧化的保存出乎意料。为了测试ccRCC在TCA循环中氧化底物的能力,我们在ccRCC患者中注入13c标记的燃料,并比较肿瘤和邻近肾脏中的标记模式。在输注[U-13C]葡萄糖后,ccrcc表现出糖酵解中间体标记增强,丙酮酸脱氢酶流量抑制,TCA循环标记减少,与Warburg效应一致。比较ccRCC、脑肿瘤和肺癌的13C标记,发现显著差异。原发性ccRCC肿瘤中糖酵解中间体的富集程度最高,TCA循环中间体的富集程度最低。在术中13C输注分析的人类肿瘤中,ccRCC是第一个表现出令人信服的向糖酵解代谢转变的肿瘤。
Clear cell renal cell carcinoma (ccRCC) is the most common form of human kidney cancer. Histological and molecular analyses suggest that ccRCCs have significantly altered metabolism. Recent human studies of lung cancer and intracranial malignancies demonstrated an unexpected preservation of carbohydrate oxidation in the tricarboxylic acid (TCA) cycle. To test the capacity of ccRCC to oxidize substrates in the TCA cycle, we infused 13C-labeled fuels in ccRCC patients and compared labeling patterns in tumors and adjacent kidney. After infusion with [U-13C]glucose, ccRCCs displayed enhanced glycolytic intermediate labeling, suppressed pyruvate dehydrogenase flow, and reduced TCA cycle labeling, consistent with the Warburg effect. Comparing 13C labeling among ccRCC, brain, and lung tumors revealed striking differences. Primary ccRCC tumors demonstrated the highest enrichment in glycolytic intermediates and lowest enrichment in TCA cycle intermediates. Among human tumors analyzed by intraoperative 13C infusions, ccRCC is the first to demonstrate a convincing shift towards glycolytic metabolism.
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