c-MYB- and PGC1a-dependent metabolic switch induced by MYBBP1A loss in renal cancer
The tumor microenvironment may alter the original tumorigenic potential of tumor cells. Under harsh environmental conditions, genetic alterations conferring selective advantages may initiate the growth of tumor subclones, providing new opportunities for these tumors to grow. We performed a genetic l...
| Autores: | , , |
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| Tipo de documento: | artigo |
| Data de publicação: | 2019 |
| País: | España |
| Recursos: | Universidad Loyola Andalucía |
| Repositório: | Brújula |
| OAI Identifier: | oai:repositorio.uloyola.es:20.500.12412/6360 |
| Acesso em linha: | https://hdl.handle.net/20.500.12412/6360 |
| Access Level: | Acceso aberto |
| Palavra-chave: | c-MYB Metabolism MYBBP1A PGC1a Renal cancer |
| Resumo: | The tumor microenvironment may alter the original tumorigenic potential of tumor cells. Under harsh environmental conditions, genetic alterations conferring selective advantages may initiate the growth of tumor subclones, providing new opportunities for these tumors to grow. We performed a genetic loss-of-function screen to identify genetic alterations able to promote tumor cell growth in the absence of glucose. We identified that downregulation of MYBBP1A increases tumorigenic properties under nonpermissive conditions. MYBBP1A downregulation simultaneously activates PGC1a, directly by alleviating direct repression and indirectly by increasing PGC1a mRNA levels through c-MYB, leading to a metabolic switch from glycolysis to OXPHOS and increased tumorigenesis in low-glucose microenvironments. We have also identified reduced MYBBP1A expression in human renal tumor samples, which show high expression levels of genes involved in oxidative metabolism. In summary, our data support the role of MYBBP1A as a tumor suppressor by regulating c-MYB and PGC1a. Therefore, loss of MYBBP1A increases adaptability spanning of tumors through metabolic switch. |
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