The γ-Glutamylcyclotransferase Inhibitor Pro-GA Induces an Antiproliferative Effect Through the Generation of Mitochondrial Reactive Oxygen Species.
Anticancer Res
; 42(9): 4311-4317, 2022 Sep.
Article
en En
| MEDLINE
| ID: mdl-36039439
ABSTRACT
BACKGROUND/AIM:
γ-Glutamylcyclotransferase (GGCT) is up-regulated in a broad range of cancers, including breast cancer, and GGCT inhibition has been shown to be a promising strategy for therapy. Herein, we evaluated the efficacy and mechanism of action of pro-GA, a GGCT enzymatic inhibitor, in MCF7 breast cancer cells. MATERIALS ANDMETHODS:
Proliferation was evaluated by WST-8 and trypan blue dye exclusion assays. Western blot analysis was conducted to examine the expression of cyclin-dependent kinase inhibitors (CDKI), including p21, p27, and p16. Induction of senescence was assessed by senescence-associated ß-galactosidase staining. Generation of mitochondrial superoxide reactive oxygen species (ROS) was assessed using flow cytometry. The effect of N-acetylcysteine (NAC) on pro-GA dependent inhibition of proliferation, ROS generation, and senescence was also studied. The efficacy of systemic administration of pro-GA was evaluated in a MCF7 xenograft mouse model.RESULTS:
Treatment with pro-GA inhibited proliferation of MCF7 cells, increased CDKI expression and mitochondrial ROS, and induced cellular senescence. We found that cotreatment with NAC restored proliferation in pro-GA treated cells. NAC similarly suppressed CDKI expression, mitochondrial ROS generation, and senescence induced by pro-GA. Furthermore, the systemic administration of pro-GA in an MCF7 xenograft model had significant antitumor effects without toxicity.CONCLUSION:
Pro-GA may be a promising therapeutic agent for the treatment of breast cancer.Palabras clave
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Asunto principal:
Neoplasias de la Mama
/
Gamma-Glutamilciclotransferasa
Límite:
Animals
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Female
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Humans
Idioma:
En
Revista:
Anticancer Res
Año:
2022
Tipo del documento:
Article
País de afiliación:
Japón