Targeting MYC induces lipid droplet accumulation by upregulation of HILPDA in clear cell renal cell carcinoma.
Proc Natl Acad Sci U S A
; 121(7): e2310479121, 2024 Feb 13.
Article
em En
| MEDLINE
| ID: mdl-38335255
ABSTRACT
Metabolic reprogramming is critical during clear cell renal cell carcinoma (ccRCC) tumorigenesis, manifested by accumulation of lipid droplets (LDs), organelles that have emerged as new hallmarks of cancer. Yet, regulation of their biogenesis is still poorly understood. Here, we demonstrate that MYC inhibition in ccRCC cells lacking the von Hippel Lindau (VHL) gene leads to increased triglyceride content potentiating LD formation in a glutamine-dependent manner. Importantly, the concurrent inhibition of MYC signaling and glutamine metabolism prevented LD accumulation and reduced tumor burden in vivo. Furthermore, we identified the hypoxia-inducible lipid droplet-associated protein (HILPDA) as the key driver for induction of MYC-driven LD accumulation and demonstrated that conversely, proliferation, LD formation, and tumor growth are impaired upon its downregulation. Finally, analysis of ccRCC tissue as well as healthy renal control samples postulated HILPDA as a specific ccRCC biomarker. Together, these results provide an attractive approach for development of alternative therapeutic interventions for the treatment of this type of renal cancer.
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Texto completo:
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Bases de dados:
MEDLINE
Assunto principal:
Carcinoma de Células Renais
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Proteínas Proto-Oncogênicas c-myc
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Gotículas Lipídicas
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Neoplasias Renais
Limite:
Humans
Idioma:
En
Revista:
Proc Natl Acad Sci U S A
Ano de publicação:
2024
Tipo de documento:
Article
País de afiliação:
Suécia