Review Article

Pterocarpus Marsupium for the Treatment of Diabetes and Other Disorders

Dhayaney Vijayan and Sibi G*

Department of Biotechnology, Indian Academy Degree College-Autonomous, India

Submission: January 24, 2019; Published: March 01, 2019

*Corresponding author: Sibi G, Head of the Department, Department of Biotechnology, Indian Academy Degree College-Autonomous, Bangalore, India

How to cite this article: Dhayaney V, Sibi G. Pterocarpus Marsupium for the Treatment of Diabetes and Other Disorders. J Complement Med Alt 006 Healthcare. 2019; 9(1): 555754. DOI:10.19080/JCMAH.2019.09.555754

Abstract

Pterocarpus marsupium Roxb., is a deciduous tree commonly grows in India and Sri Lanka. It is well known to Ayurvedic medicine because of its curative and lenitive properties. The heartwood extract of P. marsupium is reported to have many pharmacological compounds and used in treatment of various disorders. Literature was collected via electronic search (PubMed, ScienceDirect) from published articles that reports medicinal properties of P. marsupium. A significant research of antidiabetic activities and other medicinal properties of P. marsupium combined with bioactive compounds isolated from the plant will provide leads for the discovery of new drugs for the management of many disorders with minimal side effects.

Keywords: Pterocarpus marsupium; Vijayasar; Anti-diabetic; Antioxidant

Introduction

Diabetes is a chronic disorder of carbohydrate, fat and protein metabolism characterized by increased fasting and post prandial blood sugar levels. The increasing worldwide incidence of diabetes mellitus in adults constitutes a global public health burden. Out of the two types of diabetes, the incidence of non-insulin dependent diabetes mellitus is much higher than the insulin dependent diabetes mellitus. Even insulin therapy does not reinstate a permanent normal pattern of glucose homeostasis and carries an increased risk of atherogenesis and hypoglycemia. Plants are used as traditional remedies in one or other form for the treatment of diabetes. There has been an exponential growth in the field of herbal medicine and these drugs are gaining popularity both in developing and developed countries because of their natural origin and less side effects. Drugs derived from natural products have played a major role in the development of pharmaceutical treatments for diabetes.Pterocarpus marsupium Roxb., is a deciduous tree commonly grows in Sri Lanka and India [1]. It is popularly known as Vijaysar in Hindi and is a valuable medicinal plant, used mainly in Ayurveda, for the treatment of diabetes [2-4]. It is well known to Ayurvedic medicine because of its curative and lenitive properties. Its flowers are employed against fever, its heartwood as depurative, hemostatic, and rejuvenating, its wood is used for chest and body pain as well as indigestion, etc. The gum (kino) obtained from the tree is used in diarrhea, pyrosis and toothache. Bruised leaves are used externally for boils, sores, and various skin diseases. The water kept in tumblers made out of the wood of this plant is said to be beneficial for chest pain and diabetes. The bark of P. marsupiumis very effective in preventing cataract formation and reducing hyperglycemia in alloxanized diabetic rats [1] and the heartwood is useful as hypolglycemic agents [5].

Methodology

A systematic search was carried out in Pub Med, Scopus and Web of Sciences using a combination of Boolean operators. Peer reviewed papers in English on the keyword Pterocarpus marsupium were retrieved and evaluated based on titles and abstracts. The retrieved papers were managed using Mendeley and the data were consolidated.

Anti-diabetic activity

Aqueous extract of heartwood of Pterocarpus marsupium was given orally to alloxan induced type-2 diabetic rabbit model (Pradhan et al., 2017). Both the fasting blood glucose (194.8±12.7 vs. 155.2±16.3) and postprandial blood glucose (191.6±23.2 vs. 149.2±14.5) were decreased indicating the hypoglycaemic effect of P. marsupium. Incubation of red blood cells with glucose in the presence of alcoholic extract of P. marsupium under high glucose conditions lead to reduction in the accumulation of intracellular sorbitol in a dose dependent manner. There was 50% reduction of sorbitol accumulation with alcoholic extract of was observed with IC50 151.00μg/ml and 105.12μg/ml for ascorbic acid [6]. Ethanolic extract of P. marsupium heartwood have antihyperglycemic activity in streptozotocin treated diabetic rats [7]. At 100 mg/kg dose levels, fasting blood glucose, oral glucose tolerance and serum insulin levels were recorded as 113±3.40mg/dl, 35930±102.9AUC and 160±31.3ng/l respectively. Blood glucose lowering effect of P. marsupium heartwood was also reported. Antidiabetic activity of P. marsupium Roxb. heartwood in alloxan induced diabetic rats using extracts obtained by optimized conventional and non-conventional extraction methods was evaluated by Devgan et al. [8]. Ultrasound-assisted extraction was proved to enhance the antidiabetic activity of P. marsupium. Mohan Kumar et al. [9] reported that the exposure of mouse pancreatic and muscle tissues to P. marsupium extract stimulated the insulin secretion and glucose uptake, respectively, in a concentration-dependent manner. Gairola et al. [10] found that the aqueous extract significantly reduces type 2 diabetes in rats and can prevent hyperinsulinemia and hypertriglyceridemia. Aqueous extract of P. marsupium has significantly decreased the fasting blood glucose (182.5±4.1mg/dL) in type 2 diabetic rat. It also decreased the postprandial hyperglycemia significantly (112.3±2.8mg/dL) as compared to diabetic control group (301.4±5mg/dL). P.marsupium modulated the inflammatory cytokine TNF-α in type 2 diabetic rats [11]. Dhanabal et al. [12] studied the antidiabetic activity of various subfractions of the alcohol extract of the bark of Pterocarpus marsupium Roxb. in alloxan-induced diabetic rats. The butanol subfraction of the alcohol extract of P. marsupium exhibits significant antidiabetic activity and corrects the metabolic alterations in diabetic rats. Mukhtar et al. [13] reported the hypoglycemic activity of P. marsupium wood at an oral dose of 250mg/kg in alloxan induced diabetic rats. The aqueous extract of P. marsupium significantly (P<0.001) reduced the blood sugar levels from 72.32±5.62 to 61.35±1.2mg% 2 h after oral administration of the extract and also significantly lowered the blood glucose in alloxan diabetic rats from 202.91±5.44 to 85.22±11.28mg% 21 days after daily oral administration of the extract [14]. Alloxan-diabetic rats fed with the ethanolic extract of P. marsupium wood for 5 days resulted in a significant lowering of fasting blood sugar level. There was a 5-fold increase in blood glucose level of alloxan to rats after injection compared to normal controls and feeding of the extract to alloxan-diabetic animals lowered the blood sugar by 70% as compared to the alloxan-diabetic controls [15].

Antioxidant activity

Many recent studies reveal that antioxidants capable of neutralizing free radicals are effective in preventing experimentally induced diabetes in animal models. In DPPH scavenging activity and ABTS∙+ scavenging activity, IC50 values were found to be 138.3, 12.4, 13.5 and 47.8, 3.9, 4.2μg/mL for aqueous, methanolic extract of P. marsupium and standard ascorbic acid respectively. In α-amylase inhibition assay and α-glucosidase inhibition assay, IC50 values for standard Acarbose, aqueous and methanolic extract of heartwood were 44.09, 166.72, 48.20 and 45.17, 172.32, 48.12 respectively [16]. The effects of different fractions of heart wood of Pterocarpus marsupium on antioxidant enzyme like protein thiols and the efficacy of the extract for the protection of the renal function in alloxan induced diabetic rats was evaluated by Bhata, Nayak [17]. P. marsupium extract showed a promising antioxidant effect, as well as hypoglycemic activity. Aqueous extract of P. marsupium showed high antioxidant activity in all different assays used and also protected mitochondria against oxidative damage. It significantly reduced lactate dehydrogenase release along with reduction of lipid peroxidation [18]. The herbal extract mixture of P. marsupium and O. sanctum has succeeded in not only rectifying dyslipidemia but also in restoring the endogenous antioxidant levels to the pre-diabetic status in non-diabetic and alloxan induced diabetic adult female Wistar rats [19].

Anticancer activity

The cytotoxicity of P. marsupium aqueous extract was evaluated by Gosetti et al. [20] using calcein acetoxymethyl ester (calcein-AM) assays. Different cell lines were incubated for 24h with different concentrations of the aqueous heartwood extract. The IC50 values for cancer cells are comparable among the cell lines and are significantly lower (at least 50%) for the cancer cell lines than for non-tumoral cell lines, highlighting a selective cytotoxicity of the extract towards the cancer cells. α-dihydroxychalcone-glycoside (α-DHC) isolated from P. marsupium has effectively reduced nitric oxide and cytokine production by the LPS stimulated RAW 264.7 mouse macrophage cell line. The compound effectively attenuated the expression of inflammation-mediating enzymes COX-2 and iNOS at the mRNA as well as protein levels in a concentration dependent manner [21]. Pterostilbene isolated from P. marsupium was found to cause apoptosis in breast (MCF-7) and prostate (PC3) cancer cell lines. It also inhibited Matrix metalloproteinase 9 (MMP9) and α-methylacyl-CoA recemase (AMACR), two very well-known metastasis inducers [22].

Reproductive effects

Hugar et al. [23] has reported that Pterocarpus marsupium showed potential reproductive effects on testosterone propionate induced Polycystic Ovary Syndrome (PCOS) female albino rats and could be used as an alternative therapy in the treatment of PCOS.

Activity against cataract

The protective effect of Pterocarpus marsupium bark extracts against cataract in streptozotocin-induced diabetic male albino rats was investigated by Xu et al. [24]. The blood glucose was reduced up to 36% following treatment with bark extracts. The blood insulin and tissue GSH contents were substantially increased more than 100% in diabetic rats following treatment with extracts. Aldose reductase activity was reduced up to 79.3% in diabetic rats following treatment with extracts. he findings concluded that the use of P. marsupium bark extracts could be the potential therapeutic approach for the reduction of aldose reductase against diabetic cataract.

Activity against Ulcerative colitis

The effect of P. marsupium on acetic acid induced ulcerative colitis in rats was studied by Mathew et al. [25]. P. marsupiumhad significantly reduced colon inflammation and mucosal damage in the treated group. The COX-1/2 selective inhibitory activity of P. Marsupium (PM) extract was investigated by Hougee et al. [26]. PM extract, pterostilbene and resveratrol inhibited PGE2 production from LPS-stimulated human Peripheral Blood Mononuclear Cells (PBMC) with IC50 values of 3.2 +/- 1.3 microg/ mL, 1.0 +/- 0.6 micro M and 3.2 +/- 1.4 micro M, respectively. In a COX-1 Whole Blood Assay (WBA) PM extract was not effective while in a COX-2 WBA, PM extract decreased PGE2 production indicating COX-2 specific inhibition (Table 1 & Table 2) [27-56].

Go to

• Review Article
• Abstract
• Introduction
• Methodology
• Conclusion
• References

Conclusion

Major hindrance in amalgamation of herbal medicine in modern medical practices is lack of scientific and clinical data proving their efficacy and safety. This review article showed the anti-diabetic potential of a P. Marsupium for the management of hyperglycemia, along with good antioxidant activity. However limited data were available about the collective pharmaceutical property of P. Marsupium. This plant may provide leads for the discovery of new drugs for the management of many disorders with minimal side effects.

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