Protective effect of Emblica officinalis (amla) on isoproterenol-induced cardiotoxicity in rats

Shreesh Ojha, Mahaveer Golechha, Santosh Kumari, Dharamvir Singh Arya

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)

Abstract

Emblica officinalis, commonly known as amla, is an important medicinal plant reputed for its dietary and therapeutic uses. The aim of the present study was to investigate the protective role of E. officinalis against isoproterenol (ISP)-induced cardiotoxicity in rats and elucidate the possible mechanism involved. Rats were administered E. officinalis (100, 250 and 500 mg/kg, p.o.) or vehicle (normal saline) for 30 days, with concurrent subcutaneous injections of ISP (85 mg/kg, at 24 h interval) on 29th and 30th day. ISP-induced cardiac dysfunction as evidenced by decreased mean arterial pressure, heart rate, contractility (+LVdP/dt) and relaxation (-LVdP/dt) along with increased left ventricular end diastolic pressure. ISP significantly (p < 0.05) decreased antioxidant enzymes, superoxide dismutase, catalase and glutathione peroxidase and myocyte-injury-specific marker enzymes, creatine phosphokinase-MB and lactate dehydrogenase in heart. A significant (p < 0.05) depletion of reduced glutathione and increase in thiobarbituric acid reactive substances along with histopathological alteration has further indicated the oxidative damage of myocardium. However, pretreatment with E. officinalis exhibited restoration of hemodynamic and left ventricular function along with significant preservation of antioxidants, myocytes-injury-specific marker enzymes and significant inhibition of lipid peroxidation. Furthermore, histopathological salvage of myocardium reconfirmed the protective effects of E. officinalis. Results of the present study demonstrate cardioprotective potential of E. officinalis attributed to its potent antioxidant and free radical scavenging activity as evidenced by favorable improvement in hemodynamic, contractile function and tissue antioxidant status.

Original languageEnglish
Pages (from-to)399-411
Number of pages13
JournalToxicology and Industrial Health
Volume28
Issue number5
DOIs
Publication statusPublished - Jun 2012

Keywords

  • Cardiac function
  • Emblica officinalis
  • isoproterenol
  • lipid peroxidation
  • myocardial infarction
  • myocardial necrosis
  • oxidative stress

ASJC Scopus subject areas

  • Toxicology
  • Public Health, Environmental and Occupational Health
  • Health, Toxicology and Mutagenesis

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