Davallialactone protects against adriamycin-induced cardiotoxicity in vitro and in vivo.

Abstract

Adriamycin (ADR) is a potent anticancer drug. Its clinical applications are limited due to its cardiotoxicity. Oxidative stress is responsible for cardiomyopathy induced by ADR. Previous studies have demonstrated that davallialactone (DAVA), extracted from mushroom Inonotus xeranticus, has potential antiplatelet aggregation activity and free radical scavenging properties. In this study, we investigated whether DAVA has protective effects against ADR-induced free radical accumulation and apoptosis in cardiac muscle cells and compared the effects of DAVA with N-acetylcysteine, a potent antioxidant. We evaluated the effect of DAVA on ADR-induced cytotoxicity by MTT (3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium bromide) assay and crystal violet staining, the reactive oxygen species (ROS) production by flow cytometry, and the expression of stress-related proteins like Cu/Zn superoxide dismutase (SOD), Mn-SOD, and the involvement of mitogen-activated protein kinase pathway by Western blot analysis. Apoptosis was assessed by nuclear condensation and the expression levels of pro-apoptotic proteins, such as caspase-3 and polyadenosine diphosphate-ribose polymerase (PARP). The cardio-protective effects of DAVA were also evaluated in an in vivo study in an animal model of ADR-induced acute cardiomyopathy. Our results showed that DAVA significantly increased the viability of doxorubicin-injured H9c2 cells and inhibited ADR-induced ROS production, apoptosis, and the expression of Cu/Zn SOD and Mn-SOD. DAVA also inhibited the expression of extracellular signal-regulated kinase (ERK) and c-Jun N-terminal kinase (JNK), which was activated by ADR. In the in vivo animal model, treatment involving DAVA significantly reduced cardiomyocyte lesions. These results suggest that DAVA is a potentially protective agent for ADR-induced cardiotoxicity in cardiomyocytes and can be a potential candidate to protect against cardiotoxicity in ADR-treated cancer patients.

• Authors: Sankarganesh Arunachalam, Sun Young Kim, Sun Hwa Lee, Young Hee Lee, Min Sun Kim, Bong Sik Yun, Ho Keun Yi, Pyoung Han Hwang
• Journal: Journal of natural medicines (J Nat Med) Vol. 66 Issue 1 Pg. 149-57 (Jan 2012) ISSN: 1861-0293 [Electronic] Japan
• PMID: 21858697 (Publication Type: Comparative Study, Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Antibiotics, Antineoplastic
• Antioxidants
• Lactones
• Reactive Oxygen Species
• davallialactone
• Doxorubicin
• Superoxide Dismutase
• Poly(ADP-ribose) Polymerases
• Extracellular Signal-Regulated MAP Kinases
• JNK Mitogen-Activated Protein Kinases
• Casp3 protein, rat
• Caspase 3
• Acetylcysteine

Topics

• Acetylcysteine (pharmacology)
• Animals
• Antibiotics, Antineoplastic
• Antioxidants (pharmacology)
• Apoptosis (drug effects)
• Blotting, Western
• Cardiomyopathies (chemically induced, metabolism, pathology, prevention & control)
• Caspase 3 (metabolism)
• Cell Line
• Cell Survival (drug effects)
• Cytoprotection
• Disease Models, Animal
• Dose-Response Relationship, Drug
• Doxorubicin
• Enzyme Activation
• Extracellular Signal-Regulated MAP Kinases (metabolism)
• Flow Cytometry
• JNK Mitogen-Activated Protein Kinases (metabolism)
• Lactones (pharmacology)
• Male
• Mice
• Mice, Inbred BALB C
• Myocytes, Cardiac (drug effects, metabolism, pathology)
• Oxidative Stress (drug effects)
• Poly(ADP-ribose) Polymerases (metabolism)
• Rats
• Reactive Oxygen Species (metabolism)
• Superoxide Dismutase (metabolism)
• Time Factors