Quercetin reduces hydroxyurea induced cytotoxicity in immortalized mouse aortic endothelial cells

PeerJ

Racquel J. Wright¹  Alexander Quarshie²  Gale W. Newman³  Jacqueline M. Hibbert³  Jonathan K. Stiles³  Zachary M. Kiser³  Karen R. Randall⁴  Adel Driss⁵  Monica D.M. McGee⁶ 

[1] Biotechnology Centre, University of the West Indies, Mona, Jamaica;Community Health & Preventive Medicine, Morehouse School of Medicine, Atlanta, GA,United States of America;Department of Microbiology, Biochemistry, and Immunology, Morehouse School of Medicine,Atlanta, GA, United States of America;Department of Pharmacology & Toxicology, Morehouse School of Medicine, Atlanta, GA,United States of America;Department of Physiology, Morehouse School of Medicine, Atlanta, GA, United States of America;Spelman College, Atlanta, GA, United States of America;

关键词: Quercetin;    Hydroxyurea;    Sickle cell disease;    Vascular endothelial cells;   

DOI  :  10.7717/peerj.3376

来源: DOAJ

【 摘 要 】

Background Chronic inflammation is a characteristic of sickle cell disease (SCD), and is invariably associated with vascular endothelial injury. Hydroxyurea (HU), a naturally cytotoxic chemotherapeutic agent, is the only FDA drug approved for SCD, and is therefore naturally cytotoxic. Quercetin (QCT) is a dietary flavonoid found ubiquitously in plants and foods that have anti-oxidative and anti-inflammatory characteristics. Our hypothesis is that dietary QCT will decrease cytotoxic effects of lipopolysaccharide (LPS) and HU induced vascular cell damage. Methods Lipopolysaccharide (LPS) was used to induce inflammation in immortalized mouse aortic endothelial cells (iMAECs), providing an in vitro model of inflamed endothelial cells. The cells were exposed to LPS throughout the entire experiment. Interventions included treating the LPS exposed cells with QCT, HU, or QCT + HU over 50 hours. The 50-hour period included 24 hours of varying treatments, followed by two hours of hypoxic exposure and then 24 hours under normal aerobic exposure. Results LDH level was significantly higher for LPS treated versus untreated cells (P = 0.0004). LPS plus 30 micromole QCT reduced the LDH (p = 0.1, trend), whereas LPS plus 100 micromoles HU, significantly increased LDH (p = 0.0004). However, LPS plus treatment with 30 micromoles QCT/100 micromoles HU, significantly reduced LDH, compared with HU alone (p = 0.0002). Discussion These results suggest that quercetin may be effective against vascular endothelial cell damage for iMAECs in vitro. In particular, it shows promise in preventing HU-induced cytotoxicity, surprisingly found from these results. This latter finding is important, and should be given more consideration, since HU is the only FDA-approved drug for treating sickle cell patients, and its use is rapidly increasing.

【 授权许可】

Unknown