Alternative Herbal Medicine for Hypertension and Anxiety: Passiflora sp.-A short review | Open Access Journals

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Alternative Herbal Medicine for Hypertension and Anxiety: Passiflora sp.-A short review

Sabyasachi Chatterjee1*, Kaniz Wahida Sultana1, Anindita Roy2, Indrani Chandra1

1Department of Biotechnology, the University of Burdwan, Burdwan, West Bengal, India

2M.U.C. Women’s College, The University of Burdwan, Burdwan, West Bengal, India

*Corresponding Author:
Dr.Sabyasachi Chatterjee
Faculty, Department of Biotechnology,
The University of Burdwan,
Burdwan, West Bengal, India.
Tel: (+91)9474786086
E-mail: sabsach@rediffmail.com

Received: 30/12/2015 Accepted: 01/01/2016 Published: 04/01/2016

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Abstract

Hypertension, a major public health issue is responsible for cardiovascular diseases worldwide. Increase of either cardiac output or peripheral resistance of an individual will results in increase of blood pressure, which is related to hypertension. Anxiety, another health problem related to most of the people in the World, is a psychological disorder characterized by a persistent and disproportionate fear unrelated to genuine risk.

Though, Several well-known drugs are available now a day in the market, but most of the drugs have reports of side effects on patients. So, finding of alternative herbal medicine for the treatment of both the health issues are the main objectives of research groups. Some species of Passiflora plants having antihypertensive and antianxiety properties may be considered as herbal drugs as there are few reports on the above said properties.

Keywords

Hypertension, Anxiety, Passiflora sp., Chrysin, GABA (γ-amino butyric acid), Antihypertensive, Anxiolytic

Introduction

Hypertension is a common cardiovascular disease and now a day it is a major public health issue. Cardiovascular diseases account for 12 million deaths annually Worldwide.

Hypertension scientifically indicates the increase of blood pressure. Sum of cardiac output and peripheral vascular resistance signifies the blood pressure of an individual. Since, increase in either cardiac output or peripheral resistance will increase the blood pressure, this health issue is known as hypertension. Hypertension accounts for several cardiovascular pathologies such as arteriosclerosis, coronary artery disease, and myocardium infarct, renal insufficiency, stroke and dissecting aneurysm of aorta [1]. Various drugs has been introduced to control the hypertension health problems, but some of them causes side effects such as kidney failure, skin diseases, diarrhea, fever, vomiting, headache etc. So, now herbal medicines are considered as alternative of synthetic drugs.

Anxiety is a psychological disorder characterized by a persistent and disproportionate fear unrelated to genuine risk. There are several types of anxiety disorders including generalized anxiety disorder, panic disorder, social anxiety disorder and specific phobias. Though, therapeutic drugs such as monoamines, neurosteroids, benzodiazepines and serotonin are used in the treatment of anxiety disorders but due to the side effects of them, now herbal medicines are thought to be safe for treatment of anxiety disorders.

This review is about the contribution of some species of Passiflora (medicinal plant) in treatment of hypertension as well as anxiety disorders. Passiflora sp., belongs to the family of Passifloraceae, is also known as Passionflower or passion vines. Passiflora is a genus of about 500 species of flowering plants. They mostly vines, with some being shrubs and a few species being herbaceous. Mostly they are native to South America, Eastern Asia (including India), South Asia and New Guinea. Some are native to United States, California, Florida and Australia and also to New Zealand [2].

Scientific Classification [3]

Kingdom: Plantae

Class: Magnoliopsida

Subclass: Dilleniidae

Order: Violales

Family: Passifloraceae

Genus: Passiflora

Some common Passiflora species are Passiflora edulis (Passion fruit), Passiflora incarnata (Maypop), Passiflora foetida (Stinking passion flower), Passiflora alata (Winged stem passion flower), Passiflora actinia, Passiflora quadrangularis (Giant granadilla), Passiflora caerulae (Blue passion flower) and Passiflora lutea. Some of these have antihypertensive and anxiolytic property and those species can be considered as alternative herbal medicine for hypertension and anxiety instead of using drug.

Antihypertensive activity

Significantly decreased systolic and diastolic blood pressure of spontaneously hypertensive rats were observed after 1 to 7 hours of oral administration of methanolic extract of Passiflora edulis rind (outer skin of Passion fruit) (10 mg/kg or 50 mg/kg) in those spontaneously hypertensive rats (SHRs). The concentration of γ-amino butyric acid (GABA) contained in the methanolic extract of Passiflora edulis rind was measured as 2.4 mg/g of dry weight using amino acid quantitative analysis with Liquid Chromatography tandem mass spectrometry (LC-MS)/ Mass Spectrometry [4] and it has been reported that oral administration of GABA (0.5 mg/kg) significantly lowered systolic blood pressure in SHRs but not in normotensive rats [5]. Konta et al., have evaluated the antihypertensive properties of fruit pulp of Passiflora edulis on spontaneously hypertensive rats and they have reported that the highest dose of fruit pulp significantly reduced the systolic blood pressure [6]. The reduced systolic and diastolic blood pressure was observed in the hypertensive Wistar rats (hypertension -induced by administering 8% salt NaCl solution for 2 weeks) after administering the ethyl acetate extract of aerial part of the Passiflora foetida plant [7]. Patel et al., have reported that the methanolic extract of whole plant of Passiflora nepalensis possess antihypertensive activity and the reduction in mean arterial pressure, pulse and blood pressure in renal hypertensive rats after administration of 75, 150 and 225 mg/kg of that extract indicates antihypertensive effect of Passiflora nepalensis [8]. Antihypertensive effect of aqueous extract of whole plant of Passiflora nepalensis have evaluated on renal hypertensive rats [9]. Passiflora incarnata possesses the antihypertensive activity due to the presence of water-soluble substance isolated as mercury salt (C10H22O8NHgCl2) [10]. Passiflora caerulae flower extract contains chrysin (C15H10O4), a naturally occurring flavone (flavonoid). Antihypertensive activity of chrysin was observed on hepatic and renal activity of Nω-nitro-I-arginine-methylester induced hypertensive rats [11].

Antianxiety or anxiolytic activity

Antianxiety activity of Passiflora edulis plant is reported in the elevated plus maze, open-field and horizontal–wire tests performed on mice [12]. Anxiolytic activity of aqueous extract of Passiflora edulis and Passiflora alata leaves have evaluated using the elevated plus-maze test (used as anxiety animal model) and leaf extract of the both the plants at doses of 50, 100 and 150 mg/ kg have showed anxiolytic activity in the elevated plus-maze model [13]. Spray-dried powders of Passiflora edulis and Passiflora alata leaves have potential anxiolytic activity on the male adult Swiss rats administered with 200, 400 and 800 mg/kg of that spray- dried powder (evaluated by elevated plus-maze test) [14]. It is reported that butanol and ethanol extract of the aerial parts of P. edulis have anxiolytic effect at low doses [15]. It was evaluated that the methanolic extracts and fractions of Passiflora actinia leaves showed significant increase in the percentage of entries and time into the open arms of the maze (elevated maze test for anxiolytic activity) and suggested the potential anxiolytic property of Passiflora actinia [16]. A significant anxiolytic activity at a dose of 10 mg/kg of methanolic extract of P. incarnata flower have evaluated in mice using the elevated plus-maze test (model of anxiety test) [17]. Grundmann et al., demonstrated the GABA- mediated anxiolytic activity of HPLC characterized flower extracts of P. incarnata using elevated plus maze test [18]. Chrysin, a naturally occurring flavone of Passiflora caerulae flowers showed anxiolytic effect by binding to the central benzodiazepine receptors displacing [3H] flunitrazepam when examined in mice [19]. It was observed that hydroalcohol extract of Passiflora quadrangularis leaves exhibited a significant increase in time spent in the open arms at a dose of 500 mg/kg and it was evaluated in two animal models (adult male Wistar rats and Swiss mice) using elevated plus maze test for anxiety. This suggested the anxiolytic effect of Passiflora quadrangularis [20] which needs to be further explored.

References