Protective effects of Labisia pumila var. alata on biochemical and histopathological alterations of cardiac muscle cells in isoproterenol-induced myocardial infarction rats.

Abstract

The study was designed to evaluate the cardioprotective effects of the standardized aqueous and 80% ethanol extracts of Labisia pumila var. alata (LPva) in isoproterenol (ISO)-induced myocardial infarction (MI) in rats. The extracts were administered to Wistar rats orally for 28 days with three doses (100, 200 and 400 mg/kg of body weight) prior to ISO (85 mg/kg)-induced MI in two doses on day 29 and 30. The sera and hearts were collected for biochemical and histopathological analysis after the rats were sacrificed 48 h after the first induction. The main components of the extracts, gallic acid, alkylresorcinols and flavonoids were identified and quantitatively analyzed in the extracts by using a validated reversed phase HPLC method. The extracts showed significant protective effects as pretreated rats showed a significant dose-dependent decrease (p < 0.05) in cardiac enzyme activities, i.e., cardiac troponin I (cTnI), creatine kinase MB isoenzyme (CK-MB), lactate dehydrogenase (LDH), alanine transaminase (ALT) and aspartate transaminase (AST), when compared with ISO-control rats. There were significant rises (p < 0.05) in the activity of oxidase enzymes, i.e., glutathione peroxide (GPx), catalase (CAT) and superoxide dismutase (SOD) of the pretreated rats, when compared with ISO-control group. Histopathological examination showed an improvement in membrane cell integrity in pre-treated rats compared to untreated rats. The major components of LPva extracts can be used as their biomarkers and contributed to the cardioprotective effects against ISO-induced MI rats.

• Authors: Roza Dianita, Ibrahim Jantan, Athirah Z Amran, Juriyati Jalil
• Journal: Molecules (Basel, Switzerland) (Molecules) Vol. 20 Issue 3 Pg. 4746-63 (Mar 16 2015) ISSN: 1420-3049 [Electronic] Switzerland
• PMID: 25786162 (Publication Type: Journal Article, Research Support, Non-U.S. Gov't)

Chemical References

• Cardiotonic Agents
• Plant Extracts
• Isoproterenol

Topics

• Administration, Oral
• Animals
• Cardiotonic Agents (administration & dosage, chemistry, therapeutic use)
• Cell Membrane (drug effects)
• Disease Models, Animal
• Dose-Response Relationship, Drug
• Isoproterenol
• Male
• Myocardial Infarction (chemically induced, enzymology, prevention & control)
• Myocytes, Cardiac (drug effects, pathology)
• Oxidative Stress (drug effects)
• Plant Extracts (administration & dosage, chemistry, pharmacology)
• Plants, Medicinal (chemistry)
• Primulaceae (chemistry)
• Rats
• Rats, Wistar