| Autor: |
Alex J. Bott, Jianliang Shen, Claudia Tonelli, Le Zhan, Nithya Sivaram, Ya-Ping Jiang, Xufen Yu, Vrushank Bhatt, Eric Chiles, Hua Zhong, Sara Maimouni, Weiwei Dai, Stephani Velasquez, Ji-An Pan, Nathiya Muthalagu, Jennifer Morton, Tracy G. Anthony, Hui Feng, Wouter H. Lamers, Daniel J. Murphy, Jessie Yanxiang Guo, Jian Jin, Howard C. Crawford, Lanjing Zhang, Eileen White, Richard Z. Lin, Xiaoyang Su, David A. Tuveson, Wei-Xing Zong |
| Jazyk: |
angličtina |
| Rok vydání: |
2019 |
| Předmět: |
|
| Zdroj: |
Cell Reports, Vol 29, Iss 5, Pp 1287-1298.e6 (2019) |
| Druh dokumentu: |
article |
| ISSN: |
2211-1247 |
| DOI: |
10.1016/j.celrep.2019.09.056 |
| Popis: |
Summary: Glutamine is thought to play an important role in cancer cells by being deaminated via glutaminolysis to α-ketoglutarate (aKG) to fuel the tricarboxylic acid (TCA) cycle. Supporting this notion, aKG supplementation can restore growth/survival of glutamine-deprived cells. However, pancreatic cancers are often poorly vascularized and limited in glutamine supply, in alignment with recent concerns on the significance of glutaminolysis in pancreatic cancer. Here, we show that aKG-mediated rescue of glutamine-deprived pancreatic ductal carcinoma (PDAC) cells requires glutamate ammonia ligase (GLUL), the enzyme responsible for de novo glutamine synthesis. GLUL-deficient PDAC cells are capable of the TCA cycle but defective in aKG-coupled glutamine biosynthesis and subsequent nitrogen anabolic processes. Importantly, GLUL expression is elevated in pancreatic cancer patient samples and in mouse PDAC models. GLUL ablation suppresses the development of KrasG12D-driven murine PDAC. Therefore, GLUL-mediated glutamine biosynthesis couples the TCA cycle with nitrogen anabolism and plays a critical role in PDAC. : Bott et al. demonstrate that GLUL-mediated glutamine synthesis plays a critical role in converging the TCA cycle and nitrogen metabolism to promote nitrogen-dependent anabolic processes in pancreatic cancer. Ablation of GLUL suppresses PDAC development and may have important clinical implications. Keywords: glutamine, pancreatic cancer, α-ketoglutarate, nitrogen metabolism, hexosamine, nucleotide, glutamine synthetase, glutamate ammonia ligase, K-Ras |
| Databáze: |
Directory of Open Access Journals |
| Externí odkaz: |
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