Gramine attenuates EGFR-mediated inflammation and cell proliferation in oral carcinogenesis via regulation of NF-κB and STAT3 signaling - 04/02/18
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Abstract |
Gramine, a natural indole alkaloid found in Hordeum vulgare has been possesses anti-mutagenic properties. The aim of the present study was to evaluate the effect of gramine on inflammation and proliferation in 7,12-dimethylbenz[a]anthracene(DMBA)-induced hamster buccal pouch (HBP) carcinogenesis. Epidermal growth factor receptor (EGFR) tyrosine kinase phosphorylation trigged PI3K/Akt/mTOR and JAK signaling that activates NF-κB and STAT3. In contrast, gramine suppressed EGFR tyrosine kinase phosphorylation and simultaneously inhibiting PI3K/Akt/mTOR and JAK phosphorylation, thereby blockage NF-κB and STAT3 nuclear translocation. Attenuation of these oncogenic signals leads to downregulated iNOS, COX-2, TNF-α, IL-6, cyclin D1 and PCNA protein expressions. In addition, gramine enhanced the expression of the tumor suppressors p53, p21(WAF1/CIP1) and Gsk-3β by inhibiting MDM2. These results suggested that gramine exhibited anti-inflammation and anti-proliferation effects via suppressed EGFR/PI3K/Akt/mTOR/ IKK/NF-κB and JAK/STAT3 signaling pathways.
Le texte complet de cet article est disponible en PDF.Abbreviations : OSCC, HBP, DMBA, EGFR, PI3K, IKK, IκBα, NF-κB, mTOR, MDM2, JAK, STAT3, iNOS, COX-2, PCNA, TNF-α, IL-6
Keywords : Oral cancer, Indole alkaloid, DMBA, EGFR, NF-κB, STAT3
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Vol 98
P. 523-530 - février 2018 Retour au numéroBienvenue sur EM-consulte, la référence des professionnels de santé.
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