year 5, Issue 20 (12-2006)                   J. Med. Plants 2006, 5(20): 53-74 | Back to browse issues page

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1- Department of Pharmacology, Institute of Medicinal Plants, ACECR, Tehran, Iran ,
2- Institute of Medicinal Plants, ACECR, Tehran, Iran
3- Department of Pharmacology, Institute of Medicinal Plants, ACECR, Tehran, Iran
4- Pharmacist, Faculty of Pharmacy, Islamic Azad University, Tehran, Iran
5- Institue of medicinal plants, Iranian Academic Center for Education, Culture, and Research (ACECR) & Tarbiat Modares University Tehran, Iran
Abstract:   (8699 Views)
Background: Angiotensin converting enzyme (ACE) is an exopeptidase which converts angiotensin I to angiotensin II. Angiotensin II causes vasoconstriction and aldosteron secretion and inactivate bradykinin, so ACE has major role on blood pressure regulation. Objective: In this study 135 plants used in Persian traditional medicine have been investigated for their angiotensin converting enzyme (ACE) inhibitory activity potential. They were selected on the basis of their usage as antihypertensive, cardiotonics & diuretics. Methods: The dried powdered plant material, 1 g was extracted with 10 ml water and ethanol (%96) in ultrasonic bath. The extracts were filtered and concentrated in vacuum except for the water extracts, which were freeze-dried. Test solutions were made by dissolving extract in assay buffer, corresponding to a final concentration of 0.33 mg of crude plant extract in 1 ml test volume. Enzyme assay was performed by HPLC method. Plants exhibiting inhibition levels more then 50% were further tested for the presence of tannins in order to eliminate possible false positives. Results: In total, 52 species out of the 135 (39%) screened, gave more than 50% ACE inhibition. 40 species were found to possess a high ACE inhibiting ability and were low in their tannin content.
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Type of Study: Research | Subject: Traditional Pharmacy & Traditional Medicine
Received: 2006/09/4 | Accepted: 2006/11/20 | Published: 2007/01/21

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