Quercetin Interrupts the Positive Feedback Loop Between STAT3 and IL-6, Promotes Autophagy, and Reduces ROS, Preventing EBV-Driven B Cell Immortalization

Overview

Journal Biomolecules

Publisher MDPI

Specialties Biochemistry
Molecular Biology

Date 2019 Sep 25

PMID 31547402

Citations 17

Authors

Marisa Granato

Maria Saveria Gilardini Montani

Claudia Zompetta

Roberta Santarelli

Roberta Gonnella

Maria Anele Romeo

Gabriella DOrazi

Alberto Faggioni

Mara Cirone

Affiliations

Soon will be listed here.

Abstract

The oncogenic gammaherpesvirus Epstein-Barr virus (EBV) immortalizes in vitro B lymphocytes into lymphoblastoid cell lines (LCLs), a model that gives the opportunity to explore the molecular mechanisms driving viral tumorigenesis. In this study, we addressed the potential of quercetin, a widely distributed flavonoid displaying antioxidant, anti-inflammatory, and anti-cancer properties, in preventing EBV-driven B cell immortalization. The results obtained indicated that quercetin inhibited thectivation of signal transducer and activator of transcription 3 (STAT3) induced by EBV infection and reduced molecules such as interleukin-6 (IL-6) and reactive oxidative species (ROS) known to be essential for the immortalization process. Moreover, we found that quercetin promoted autophagy and counteracted the accumulation of sequestosome1/p62 (SQSTM1/p62), ultimately leading to the prevention of B cell immortalization. These findings suggest that quercetin may have the potential to be used to counteract EBV-driven lymphomagenesis, especially if its stability is improved.

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