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Qurba Firdous et al / Int. J. Res. Ayurveda Pharm. 9 (1), 2018 Review Article www.ijrap.net ETHNOPHARMACOLOGY, PHYTOCHEMISTRY AND BIOLOGICAL ACTIVITY OF INULA RACEMOSA HOOK. F: A REVIEW Qurba Firdous 1, Mohammad Faizan Bhat 2, Mubashir Hussain M 3* 1Department of Pharmaceutical Sciences, University of Kashmir, Srinagar, J&K, India 2Research Fellow, Department of Pharmaceutical Sciences, University of Kashmir, Srinagar, J&K, India 3Sr. Assistant Professor, Department of Pharmaceutical Sciences, University of Kashmir, Srinagar, J&K, India Received on: 25/10/17 Accepted on: 18/12/17 *Corresponding author E-mail: [email protected] DOI: 10.7897/2277-4343.09120 ABSTRACT Inula racemosa Hook. F (Asteraceae) commonly known as Pushkaramula is a well documented Indian medicinal plant. Pushkarmula is one of the herbs mentioned in all Ayurvedic scriptures. It possesses various synonyms like kasari- an enemy of cough, sulahara - pain killer, sughandhika - fragrant etc. The great sage Charaka has categorized it as hikkanigrahana – stops hiccup and svasahara – alleviates the breathlessness, asthma. It is also best medicament for pleurisy along with cough and asthma. Pushkarmula is highly acclaimed to be the drug of choice for pleurisy (parsvasula). It has also anti-inflammatory, cardiovascular, hypoglycemic, antianginal, analgesic and antibacterial properties. Many of these ethnomedicinal properties have been experimentally proven in different animal models. This article is an attempt to collect and review all the data concerning systemic scientific study of ethnopharmacology of I. racemosa, its isolated phytoconstituents and bioactivity of extracts as well as isolated compounds from the plant. Keywords: Inula racemosa, ethnopharmacology, phytochemistry, bioactivity. INTRODUCTION Disease3. Various active constituents have been isolated from the plant, most important being sesquiterpene lactones- The plant, Inula racemosa is abundantly found in India, China Alantolactone (ALT), and isoalantolactone (IALT) that show and Europe. The plant grows in temperate and alpine Western anti-inflammatory and decreased proteolytic activity4-5. This Himalayas from 1300 to 4500 meters elevation. The plant is review is therefore aimed to comprehensively collect all the distributed in temperate alpine Himalayas at an altitude of literature regarding ethnopharmacology, phytoconstituents, and 1,500- 4,200m from Kashmir to Kumaon, Afghanistan to biological activity of Inula racemosa. Central Nepal. It occurs wild among strong alpine scrub vegetation in the cold arid habitat of NW Himalayas between Ethnopharmacology 2,700-3,500 m in the eastern Ladakh (Leh) region of Kashmir. Inula racemosa has been used as traditional medicine in East Domesticated forms of this incipient cultigen are cultivated on Asia and Europe. In China it has been prescribed for abdominal borders of agricultural fields of wheat, barley and buckwheat pain, acute enteritis and bacillary dysentery. The roots are both in Kashmir and Lahaul valley of Himachal Pradesh1. The widely used as indigenous medicine, as an expectorant and in plant is a stout shrub, bearing large leaves arranged in a veterinary medicine as a tonic2. Native Americans use this plant racemose manner. The stem is grooved and all vegetative parts for treatment of tuberculosis6. Root powder is reportedly are scabridtomentose. Lower leaves are narrowed to a winged hypoglycemic and hypocholesterolemic in human subjects 7. It leaf stack. Upper leaves are lanceolate and stem clasping. The brought about a beneficial improvement in ST-T changes in abaxiallaminal face is densely tomentose. The fresh root is ECG of patients with Ischemic heart disease (IHD)8. brown and becomes grayish on drying. The fresh roots resemble the aroma of camphor. The fruits, slender achenes have long Combination therapy of Inula racemosa with other plants and pappus hairs. Root stock is branched. Sometimes a number of extracts has also shown substantial biological activities. It is roots are found in the collar zone, though usually few occur in anti-anginal and hypolipidemic when used in combination with each clump. These roots have a dull brownish skin with guggulu in patients with Ischemic heart disease3.It exerts yellowish colour inside. They possess a sweet and somewhat cardioprotective effect in isoproterenol induced myocardial camphoraceous odour and have a bitter taste2. ischemia in rats when used in combination with drugs Terminalia arjuna and Commiphora mukul9.It reduced Inula racemosa is known to be used in traditional medicine corticosteroid induced hyperglycaemia in mice when used with throughout the world, especially East Asia and Europe. Apart Gymnema leaf extract10. from being used for other ailments, the plant extract and its isolated active constituents show promising activity against The drug exhibited negative chronotropic effect and positive abdominal pain, acute enteritis, bacillary dysentery, expectorant ionotropic effect on isolated frog heart with petroleum ether and tonic2. Inula racemosa is also used in combination with extract(200mg/kg).Further, increase of dose to 400mg/kg other plant extracts and used for various conditions including exhibited adrenaline-induced beta blocking activity in rats 11. hyperlipidemia, angina and patients with Ischemic Heart Petroleum ether extract exhibited less hepatoprotective activity 95 Qurba Firdous et al / Int. J. Res. Ayurveda Pharm. 9 (1), 2018 as compared to the aqueous, methanolic and total aqueous from Kashmir is reported to yield 5.7-6.2% petroleum ether extract 12.Moreover, with the alcoholic extract significant extract while those from Lahaul valley, Himachal Pradesh protection against egg albumin induced passive cutaneous reportedly yield 8.5%w/w constituted of 83%lactones1. The anaphylaxis was provided and the alcoholic extract is non-toxic major lactones ALT and IALT are in the ratio 4:6. upto 2100±60mg/kg i.p in rats 13. Furthermore, anti- dermatophytic and anti-cholinergic activities were exhibited by Investigation on the aerial parts of Inula racemosa reported the the crude alcoholic extract, the former reportedly localized in presence of several other sesquiterpene lactones namely ivalin the hexane soluble fraction14. acetate, 2d-OH alantolactone, 1- desoxy-8-epi-ivangustin, 8-epi- isoivangustin, 9β-OH costunolide, 9 β-propionyloxycostunolide, Isolated phytochemical constituents from Inula racemosa 9 β-(2-methylbutaryloxyl) costunolide, 4β-5α-epoxy-10 α, 14H- inuviscolide, 4β, 5α-epoxy-4,5-cis-inunolide, 4H-tomentosin, Inula racemosa yields large amounts of sesquiterpene lactones 4H carbrone. as-Alantolactone (ALT) and isoalantolactone (IALT)4, Dihydroalantolactone, dihydroisoalantolactone, inunolide15, Structure 21 was identified as 1-4-epi-alantolactone;(2) 4- dihydroinunolide, neoalantolactone, isoalloalantolactone16, alpha,13-dihydroxy-5,7(11)-eudesmadien-12,8-olide.Six known alloalantolactone17, inunal, isoinunal18, alantodiene and eudesmane-12,8-olide,viz.,Septuplinolide(3) isoalantodiene19 are other sesquiterpene lactones isolated from 22;macrophyllilactone E (4)23;13-acetyloxy-5,7(11)- the non polar fractions of the root. eudesmadien-12,8-olide (5) 24; 11 alpha,13-dihydro-2alpha- hydroxy-alantolactone (6) 25; 11,13-dihydroivalin (7) 26; Daucosterol, D- mannitol and Beta sitosterol have also been Isoalantolactone(8)27. (Figure 1) reported in good quantities from the roots 20. Roots of ‘mano’ Biological Activities of Isolated Compounds ALT and IALT promotes the growth in number of rootlets of Phaseolus aureus by a factor of 2-2.5 as compared to control in “Sesquiterpene lactones are important because of their various the experiment27. IALT is herbicidal because of its lipophilicity. biological activities and generic inhibition of enzymes28. They It gets incorporated into cell membrane and does not reach to provide protection to the plant against various pathogenic other regions of the plant 31. organisms, insects and mammals. They are secondary metabolites of plant exerting various biochemical effects on ALT and IALT showed an increase in the antioxidant activity of other flora and vertebrate poisoning29. lipids at doses of 100-200 mgkg-1, their action considerably more than antioxidant activity of α-tocopherol and ubiquinone. The main sesquiterpene lactones found in Inula racemosa are The anti-tussive activity of helenin in guinea pigs has been seen, ALT and IALT5.Amixture containing both the lactones is called but it is half that of codeine5, 32. Inula camphor (Helenin). In antiquity Inula helenium (Elecampane) contains both ALT and IALT. It was added to Both ALT and IALT possess antibacterial activities against food as a seasoning in the middle age and later, it came to be many of gram positive and gram negative bacteria. ALT is used for medicinal purposes. Now a days, this mixture is the completely inhibitory to Bacillus subtilis, while IALT exhibited active principle of drug Alanton which is used for ulceration30. weak antibacterial activity towards Bacillus subtilis and Bacillus The drug is anti-inflammatory, antiproteolytic and is used to vulgaris. ALT and helenin possessed pronounced inhibitory regulate the acidic function of the stomach. Alanton also effect against Staphylococcus aureus and Mycobacterium promotes mucin formation and stimulates the regenerative tuberculosis at 31.2-62.5 and 31.22µg/ml respectively. capacity of the gastric mucosa5. The antifungal activity has been studied in relation to more than 16 different cultures for both ALT