Modulation of the oral glucocorticoid system during black raspberry mediated oral cancer chemoprevention.
Carcinogenesis
; 43(1): 28-39, 2022 02 11.
Article
en En
| MEDLINE
| ID: mdl-34888650
ABSTRACT
Recent reports suggest that glucocorticoids (GCs), which can be synthesized in the oral mucosa, play an important role in cancer development. Therefore, the objectives of this study were to characterize the role of the oral GC system in oral cancer, and determine the effect of black raspberry (BRB) administration on GC modulation during oral cancer chemoprevention. We determined the expression of GC enzymes in various oral cancer cell lines, and investigated the role of the GC inactivating enzyme HSD11B2 on CAL27 oral cancer cells using siRNA mediated knockdown approaches. Using two in vivo models of oral carcinogenesis with 4-nitroquinoline 1-oxide carcinogen on C57Bl/6 mice and F344 rats, we determined the effect of BRB on GC modulation during head and neck squamous cell carcinoma chemoprevention. Our results demonstrate that HSD11B2, which inactivates cortisol to cortisone, is downregulated during oral carcinogenesis in clinical and experimental models. Knockdown of HSD11B2 in oral cancer cells promotes cellular proliferation, invasion and expression of angiogenic biomarkers EGFR and VEGFA. An ethanol extract of BRB increased HSD11B2 expression on oral cancer cells. Dietary administration of 5% BRB increased Hsd11b2 gene and protein expression and reduced the active GC, corticosterone, in cancer-induced mouse tongues. Our results demonstrate that the oral GC system is modulated during oral carcinogenesis, and BRB administration upregulates Hsd11b2 during oral cancer chemoprevention. In conclusion, our findings challenge the use of synthetic GCs in head and neck cancer, and support the use of natural product alternatives that potentially modulate GC metabolism in a manner that supports oral cancer chemoprevention.
Texto completo:
1
Colección:
01-internacional
Base de datos:
MEDLINE
Contexto en salud:
1_ASSA2030
Problema de salud:
1_doencas_nao_transmissiveis
Asunto principal:
Neoplasias de la Boca
/
Rubus
/
Glucocorticoides
Tipo de estudio:
Prognostic_studies
Límite:
Animals
Idioma:
En
Revista:
Carcinogenesis
Año:
2022
Tipo del documento:
Article
País de afiliación:
Estados Unidos