Glutamate and asparagine cataplerosis underlie glutamine addiction in melanoma.
Glutamate and asparagine cataplerosis underlie glutamine addiction in melanoma.
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黑色素瘤中谷氨酸成瘾的基础谷氨酸和天冬酸酯蛋白催化剂。
DOI:
10.18632/oncotarget.3132
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发表时间:
2015-04-10
期刊:
影响因子:
--
通讯作者:
Scott DA
中科院分区:
文献类型:
--
作者:
Ratnikov B;Aza-Blanc P;Ronai ZA;Smith JW;Osterman AL;Scott DA
Glutamine dependence is a prominent feature of cancer metabolism, and here we show that melanoma cells, irrespective of their oncogenic background, depend on glutamine for growth. A quantitative audit of how carbon from glutamine is used showed that TCA-cycle-derived glutamate is, in most melanoma cells, the major glutamine-derived cataplerotic output and product of glutaminolysis. In the absence of glutamine, TCA cycle metabolites were liable to depletion through aminotransferase-mediated α-ketoglutarate-to-glutamate conversion and glutamate secretion. Aspartate was an essential cataplerotic output, as melanoma cells demonstrated a limited capacity to salvage external aspartate. Also, the absence of asparagine increased the glutamine requirement, pointing to vulnerability in the aspartate-asparagine biosynthetic pathway within melanoma metabolism. In contrast to melanoma cells, melanocytes could grow in the absence of glutamine. Melanocytes use more glutamine for protein synthesis rather than secreting it as glutamate and are less prone to loss of glutamate and TCA cycle metabolites when starved of glutamine.
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影响因子:
9.9
作者:
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通讯作者:
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影响因子:
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3.7
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De Ingeniis J;Ratnikov B;Richardson AD;Scott DA;Aza-Blanc P;De SK;Kazanov M;Pellecchia M;Ronai Z;Osterman AL;Smith JW
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Smith JW
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20.3
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Bouscary, Didier
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11.4
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Silverman, L. B.;Stevenson, K. E.;O'Brien, J. E.;Asselin, B. L.;Barr, R. D.;Clavell, L.;Cole, P. D.;Kelly, K. M.;Laverdiere, C.;Michon, B.;Schorin, M. A.;Schwartz, C. L.;O'Holleran, E. W.;Neuberg, D. S.;Cohen, H. J.;Sallan, S. E.
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Sallan, S. E.