title: (-)-Epigallocatechin-3-gallate alleviates doxorubicin-induced cardiotoxicity in sarcoma 180 tumor-bearing mice.
abstract: OBJECTIVE
  (-)-Epigallocatechin-3-gallate (EGCG), a major green tea polyphenol compound, plays an important role in the prevention of cardiovascular disease and cancer. The present study aimed to investigate the effects of EGCG on doxorubicin (DOX)-induced cardiotoxicity in Sarcoma 180 (S180) tumor-bearing mice.
  
  
  METHODS
  S180 tumor-bearing mice were established by subcutaneous inoculation of S180 cells attached to the axillary region. The extent of myocardial injury was accessed by the amount of lactate dehydrogenase (LDH) released in serum. Heart tissue was morphologically studied with transmission electron microscopy. Apoptosis, reactive oxygen species (ROS) generation, mitochondrial membrane potential (ΔѰm) as well as calcium concentration were measured by flow cytometric analysis. Expression levels of manganese superoxide dismutase (MnSOD) were analyzed by Western blot.
  
  
  RESULTS
  Results showed that the combination with EGCG and DOX significantly inhibited tumor growth and enhanced induction of apoptosis compared with DOX alone. Moreover, administration of EGCG could suppress DOX-induced cardiotoxicity as evidenced by alleviating LDH release and apoptosis in cardiomyocyte. EGCG-evoked cardioprotection was in association with the increase of ΔѰm and MnSOD expression. EGCG was also found to attenuate ROS generation and myocardial calcium overload in Sarcoma 180 tumor-bearing mice subjected to DOX.
  
  
  CONCLUSIONS
  EGCG alleviated DOX-induced cardiotoxicity possibly in part mediated by increasing of MnSOD and Ѱm, reducing myocardial calcium overload and subsequently attenuating the apoptosis and LDH release. Our findings suggest that co-administration of EGCG and DOX have potential as a feasible strategy to mitigate cardiotoxicity of DOX without compromising its chemotherapeutic value.
authors.affiliation: Chinese Liberation Army No. 94 Hospital, No. 1028, Jinggangshan Avenue, Nanchang 330000, China; The Great Wall Affiliated Hospital, Nanchang University, No. 1028, Jinggangshan Avenue, Nanchang 330000, China.
authors.forename: Yu-Fei
authors.initials: YF
authors.lastname: Yao
authors.affiliation: School of Basic Medical Sciences, Nanchang University, No. 999 Xuefu Road, Nanchang 330031, China.
authors.forename: Xiang
authors.initials: X
authors.lastname: Liu
authors.affiliation: State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
authors.forename: Wen-Juan
authors.initials: WJ
authors.lastname: Li
authors.affiliation: State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China.
authors.forename: Zi-Wei
authors.initials: ZW
authors.lastname: Shi
authors.affiliation: School of Basic Medical Sciences, Nanchang University, No. 999 Xuefu Road, Nanchang 330031, China.
authors.forename: Yu-Xin
authors.initials: YX
authors.lastname: Yan
authors.affiliation: School of Basic Medical Sciences, Nanchang University, No. 999 Xuefu Road, Nanchang 330031, China.
authors.forename: Le-Feng
authors.initials: LF
authors.lastname: Wang
authors.affiliation: School of Basic Medical Sciences, Nanchang University, No. 999 Xuefu Road, Nanchang 330031, China.
authors.forename: Ming
authors.initials: M
authors.lastname: Chen
authors.affiliation: State Key Laboratory of Food Science and Technology, Nanchang University, 235 Nanjing East Road, Nanchang 330047, China. Electronic address: myxie@ncu.edu.cn.
authors.forename: Ming-Yong
authors.initials: MY
authors.lastname: Xie
mesh_terms: D000818:Animals; D000903:Antibiotics, Antineoplastic / Q000008:administration & dosage / Q000633:toxicity*; D017209:Apoptosis / Q000187:drug effects; D002118:Calcium / Q000378:metabolism; D002316:Cardiotonic Agents / Q000302:isolation & purification / Q000494:pharmacology; D066126:Cardiotoxicity / Q000209:etiology / Q000517:prevention & control*; D002392:Catechin / Q000031:analogs & derivatives* / Q000302:isolation & purification / Q000494:pharmacology; D004317:Doxorubicin / Q000008:administration & dosage / Q000633:toxicity*; D007770:L-Lactate Dehydrogenase / Q000378:metabolism; D053078:Membrane Potential, Mitochondrial / Q000187:drug effects; D051379:Mice; D046529:Microscopy, Electron, Transmission; D032383:Myocytes, Cardiac / Q000187:drug effects / Q000378:metabolism; D017382:Reactive Oxygen Species / Q000378:metabolism; D012510:Sarcoma 180 / Q000188:drug therapy* / Q000378:metabolism; D013482:Superoxide Dismutase / Q000378:metabolism; D013662:Tea / Q000737:chemistry
chemical_list: D000903:Antibiotics, Antineoplastic; D002316:Cardiotonic Agents; D017382:Reactive Oxygen Species; D013662:Tea; D004317:Doxorubicin; D002392:Catechin; C045651:epigallocatechin gallate; D007770:L-Lactate Dehydrogenase; D013482:Superoxide Dismutase; D002118:Calcium
keywords: (−)-Epigallocatechin-3-gallate; Cardiotoxicity; Doxorubicin; Reactive oxygen species