Abstract:
:Caloric restriction (CR) is proposed to decrease tumorigenesis through a variety of mechanisms including effects on glycolysis. However, the understanding of how CR affects the response to cancer therapy is still rudimentary. Here, using the Eµ-Myc transgenic mouse model of B-cell lymphoma, we report that by reducing protein translation, CR can reduce expression of the prosurvival Bcl-2 family member Mcl-1 and sensitize lymphomas to ABT-737-induced death in vivo. By using Eµ-Myc lymphoma cells lacking p53, we showed that CR mimetics such as 2-deoxyglucose led to a decrease in Mcl-1 expression and sensitized lymphoma cells to ABT-737-induced death independently of p53. In keeping with this, Eµ-Myc lymphoma cells lacking the BH3-only proapoptotic members Noxa, Puma, or Bim were also sensitized by CR mimetics to ABT-737-induced death. Remarkably, neither the loss of both Puma and Noxa, the loss of both Puma and Bim, nor the loss of all three BH3-only proteins prevented sensitization to ABT-737 induced by CR mimetics. Thus, CR can influence Mcl-1 expression and sensitize cells to BH3 mimetic-induced apoptosis, independently of the main BH3-only proteins and of p53. Exploiting this may improve the efficiency of, or prevent resistance to, cancer therapy.
journal_name
Bloodjournal_title
Bloodauthors
Meynet O,Zunino B,Happo L,Pradelli LA,Chiche J,Jacquin MA,Mondragón L,Tanti JF,Taillan B,Garnier G,Reverso-Meinietti J,Mounier N,Michiels JF,Michalak EM,Carles M,Scott CL,Ricci JEdoi
10.1182/blood-2013-01-478651subject
Has Abstractpub_date
2013-10-03 00:00:00pages
2402-11issue
14eissn
0006-4971issn
1528-0020pii
blood-2013-01-478651journal_volume
122pub_type
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