Fawzi Mahomoodally

Plants' Metabolites as Potential Antiobesity Agents

Obesity and obesity-related complications are on the increase both in the developed and developing world. Since existing pharmaceuticals fail to come up with long-term solutions to address this issue, there is an ever-pressing need to find and develop new drugs and alternatives. Natural products, particularly medicinal plants, are believed to harbor potential antiobesity agents that can act through various mechanisms either by preventing weight gain or promoting weight loss amongst others. The inhibition of key lipid and carbohydrate hydrolyzing and metabolizing enzymes, disruption of adipogenesis, and modulation of its factors or appetite suppression are some of the plethora of targeted approaches to probe the antiobesity potential of medicinal plants. A new technology such as metabolomics, which deals with the study of the whole metabolome, has been identified to be a promising technique to probe the progression of diseases, elucidate their pathologies, and assess the effects of natural health products on certain pathological conditions. This has been applied to drug research, bone health, and to a limited extent to obesity research. This paper thus endeavors to give an overview of those plants, which have been reported to have antiobesity effects and highlight the potential and relevance of metabolomics in obesity research.

Biological activity from indigenous medicinal plants of Mauritius

The Mauritian population has a long tradition in the use of ethno-medicine, and the practice is still strong, especially in the treatment of minor ailments. Such interest stems from an existing culture, and many “tisanes” are still prepared from plant materials and sold in several markets around the island. This paper will focus on the various chemical/biological screening techniques currently being used to evaluate the biological properties of medicinal plant extracts. Particular emphasis will be put on extraction and various screening for biological/pharmacological properties. Due consideration will be given to the pharmacological approaches that utilize different animal models for the in vitro and in vivo screening of medicinal plant extracts.

Medicinal plants from the genus Acalypha (Euphorbiaceae)–A review of their ethnopharmacology and phytochemistry

ETHNOPHARMACOLOGICAL RELEVANCE Acalypha is the fourth largest genus of the Euphorbiaceae family with approximately 450-570 species. Several Acalypha species are used as medicinal plants in Africa and in the Mascarene Islands. Almost every part of the plant including the leaves, stem and roots are used as traditional remedies to treat and manage a panoply of ailments. However, there is no updated compilation of traditionally important medicinal plants from the Acalypha genus. The present review therefore, endeavors to provide for the first time an updated compilation of documented ethnopharmacological information in relation to the ethnomedicinal, ethnoveterinary, zoopharmacognosy, phytochemistry and biological activities of medicinal plants from the Acalypha genus which can subsequently open new perspectives for further pharmacological research. MATERIALS AND METHODS A literature search was performed on Acalypha species using ethnobotanical text books and scientific databases such as Pubmed, Scopus, EBSCO, Google Scholar and other web sources such as records from PROTA, PROSEA, and Botanical Dermatology Database. The Plant List, International Plant Name index and Kew Botanical Garden Plant name databases were used to validate scientific names. RESULTS AND DISCUSSION Plants from Acalypha genus are traditionally used in the treatment and/or management of diverse ailments such as diabetes, jaundice, hypertension, fever, liver inflammation, schistosomiasis, dysentery, respiratory problems including bronchitis, asthma and pheumonia as well as skin conditions such as scabies, eczema and mycoses. Approximately 124 species were listed in ethnobotanical studies with some botanical description and others mentioned from different web sources. However, only 40 species have been included in the present review due to the unavailability of ethnopharmacological data on the remaining species. Among the 40 cited species, 30 were traditionally used for the treatment and/or management of approximately 70 human diseases or health conditions. Two species, Acalypha alnifolia and Acalypha fruticosa are used as insecticides and sand fly repellent respectively. Only 2 species (Acalypha fruticosa and Acalypha indica) are used in ethnoveterinary practice and have similar human and veterinary applications. In zoopharmacognosy, only Acalypha ornata has been mentioned. Natives from Africa, Central America, North America, Southern China, India, Bangladesh, Papua New Guinea and Mascarenes islands utilize Acalypha species as ethnomedicine. Traditionally used Acalypha species have been reported to possess at least one of the following biological activities: antimicrobial, anti-diabetic, antioxidant, anti-inflammatory, larvidal, pupicidal, hepatoprotective, anticancer, leishmanicidal, antihyperglycemic, antihypertensive, anti-venom, analgesic, anthelmintic, antiemetic, laxative, expectorant, diuretic, post-coital antifertility effects and wound healing. A total of 167 compounds have been identified from 19 species, with 16 from eight species were reported to be bioactive. CONCLUSION The present review represents 32.3% of species from the Acalypha genus and can be considered as the first compilation of ethnopharmacologically useful plants from this genus. There is a great potential to discover new biologically active phytochemicals from the Acalypha genus because only few species have been studied comprehensively. Therefore, the clinical evaluation of species from this genus is warranted in future studies to confirm the ethnomedicinal claims and for the safety approval of therapeutic applications.

Bitter melon: an exotic vegetable with medicinal values

Purpose – This article focuses on some of the reported medicinal values of bitter melon, an exotic vegetable forming part of the cuisine of various countries.Design/methodology/approach – Available data in the literature strongly support the anti‐hypoglycaemic properties of Bitter melon. A literature view was carried out and the data were used to validate our findings regarding the effects of extracts of Momordica charantia on uptake of sugar.Findings – Our work adds on to the growing evidence of the anti‐diabetic properties of bitter melon.Practical implications – In view of evidence reported in the literature regarding the medicinal properties of vegetables, the importance of vegetables in a well balanced diet should therefore be strongly advocated.Originality/value – This paper adds on to the evidence of the use of Momordica charantia as a medicinal plant in traditional medicine in the control of blood sugar level.

Antioxidant, antiglycation and cytotoxicity evaluation of selected medicinal plants of the Mascarene Islands

BackgroundMany indigenous plants of Mascarene Islands have been used in folkloric medicine to manage diabetes but few species have received scientific attention. Selected traditional medicinal plants (Antidesma madagascariense Lam. -Euphorbiaceae (AM), Erythroxylum macrocarpum O.E.Schulz -Erythroxylaceae (EM), Pittosporum senacia Putterl -Pittosporaceae (PS), Faujasiopsis flexuosa Lam. C.Jeffrey -Asteraceae (FF), Momordica charantia Linn -Cucurbitaceae (MC) and Ocimum tenuiflorum L -Lamiaceae (OT) were evaluated for their antioxidant, antiglycation and cytotoxic potential in vitro.MethodsGraded concentrations (1.25-100 μg/mL) of the crude methanolic and water extracts and fractions (dichloromethane, ethyl-acetate, n-butanol and water) were evaluated for abilities to scavenge 2,2-diphenyl-2-picrylhydrazyl hydrate (DPPH), nitric oxide (NO), superoxide (SO) radicals and to inhibit lipoxygenase and formation of advanced glycation endproduct (AGE) in vitro. The MTT (3-(4, 5-dimethylthazol-2-yl)-2,5-diphenyl tetrazonium bromide) cytotoxicity test was performed on 3T3 cell line.ResultsOnly IC50 for DPPH, SO, NO and lipoxygenase for AM, FF and OT crude extracts and fractions were comparable to ascorbic acid and quercetin activity. Crude aqueous extracts of AM and FF showed IC50 of 4.08 and 3.89 μg/mL respectively for lipoxygenase which was significantly lower (p < 0.05) than quercetin (10.86 ± 0.68 μg/mL). The three crude aqueous extracts of these plants and their n-butanol fractions also showed antiglycation activities (p < 0.05) comparable to aminoguanidine. Increasing concentrations (250-2000 μg/mL) of the six crude extracts (Methanol and water) and their fractions did not inhibit mitochondrial respiration as measured by MTT cytotoxicity assay.ConclusionAM, FF and OT crude extracts and fractions have potent antioxidant and antiglycation properties with no apparent cytotoxicity and might have prophylactic and therapeutic potentials in the management of diabetes and related complications. Our study tends to validate the traditional use of these medicinal herbs and food plants as complementary and alternative medicines.

Complementary and alternative medicine use among Mauritian women

OBJECTIVE To assess CAM usage among women in Mauritius. METHODS Cross-sectional survey with a nationally-representative sample (n = 384). Quantitative indices included informant-consensus factor, use-value, fidelity-value and use-mentions were calculated. RESULTS Thirteen therapies were identified and currently are used to treat or manage 26 ailments. These were phytotherapy (30%); yoga (13%); deep-breathing (12%); massage therapy (11%); ayurvedic medicine (8%); meditation (6%); zootherapy (6%); homeopathy (5%); exercise (3%) and reiki (3%). The most prevalent CAM was phytotherapy. Based on the quantitative ethnobotanical indices, plants commonly used were Acalphya spp., (Copper leaf), Curcuma longa (Tumeric), Cymbopogon citratus (Lemon grass), Erythroxylum hypericifolium (Bois ronde), Lens culinaris (Lentil) and Mentha piperita (Mentha). Interestingly, the present study is the first attempt to record CAM management of womens health in Mauritius. CONCLUSIONS This study can be considered as a primary information resource recording the current use of CAM by women in Mauritius.

Common phyto-remedies used against cardiovascular diseases and their potential to induce adverse events in cardiovascular patients

Cardiovascular diseases (CVDs) remain the leading cause of death globally. In addition to conventional medications, a plethora of herbal products continue to offer therapeutic alternatives to patients to assuage suffering. Nonetheless, concomitant administration of herbs and conventional medicine are not always safe which could mimic, oppose or magnify the effect of the latter leading to serious herb-drug interactions, most of which escape pharmacovigilance. The paucity of relevant information to clinicians in relation to herb-drug interactions, the inadequacy of evidence-based knowledge coupled with the lack of mechanistic facts poses a momentous threat to meet desired therapeutic outcomes in CVD patients. In this endeavor, key scientific databases have been explored to review common herbal products that might interfere clinically with conventional drugs used for CVDs and related complications. Ten common medicinal plants have been included and representative case reports whereby herbal products are thought to be inducers of adverse events are also discussed. It is anticipated that the present review will be a pinnacle of evidence and hence serve as an up-to-date fundamental repertoire of recent scientific findings to promote better understanding of adverse herb-drug events amongst clinicians and enhance rapport between clinicians and patients for subsequent counseling. Indeed, acknowledging the risks attributed to herb-drug interactions is fundamental in the management of CVDs and related implications which should not be underestimated or considered as trivial by both health-care professionals and herbal consumers.

Is Healthy Eating Behaviour Common Among School Adolescents in Mauritius

Adolescents eating behaviours have come in the limelight because of the unconventional meals, fast-food intake, and snacking. This study was therefore undertaken to appraise and understand eating behaviours of secondary school adolescents in Mauritius. Data were collected randomly from a representative sample (n=384) of adolescents via a self-administered questionnaire and analysed statistically to examine associations, if any, between socio-demographic factors and eating behaviours. Breakfast was the most frequently (68%) missed meal, attributed mainly to lack of time (79.2%). No significant difference was observed between common socio-demographic variables and breakfast skipping. Adolescents tend to consume healthy food items such as breakfast cereals, fruits and vegetables while fast food consumption was universally present but higher among low income groups. Snacking was highly prevalent (84%) and occurred more often in female teens, urban residents and middle and higher income groups. However, snacking pattern revealed a healthy trend with 76% adolescents reporting drinking water and fruits appeared to be the most popular snack (Popularity Score: 5.57). This study shows that there has been an improvement in the eating behaviour of school adolescents in Mauritius compared to previous local studies.

Morinda citrifolia L. leaf extract prevent weight gain in Sprague-Dawley rats fed a high fat diet

ABSTRACT Background: Morinda citrifolia L. is widely used as a folk medicinal food plant to manage a panoply of diseases, though no concrete reports on its potential anti-obesity activity. This study aimed to evaluate the potential of M. citrifolia leaf extracts (MLE60) in the prevention of weight gain in vivo and establish its phytochemical profile. Design: Male Sprague-Dawley rats were divided into groups based on a normal diet (ND) or high fat diet (HFD), with or without MLE60 supplementation (150 and 350 mg/kg body weight) and assessed for any reduction in weight gain. Plasma leptin, insulin, adiponectin, and ghrelin of all groups were determined. 1H NMR and LCMS methods were employed for phytochemical profiling of MLE60. Results: The supplementation of MLE60 did not affect food intake indicating that appetite suppression might not be the main anti-obesity mechanism involved. In the treated groups, MLE60 prevented weight gain, most likely through an inhibition of pancreatic and lipoprotein activity with a positive influence on the lipid profiles and a reduction in LDL levels . MLE60 also attenuated visceral fat deposition in treated subjects with improvement in the plasma levels of obesity-linked factors . 1Spectral analysis showed the presence of several bioactive compounds with rutin being more predominant. Conclusion: MLE60 shows promise as an anti-obesity agents and warrants further research.

Natural inhibitors of advanced glycation end‐products

Purpose – The purpose of this paper is to focus on some of the reported natural advanced glycation end‐products (AGE) inhibitors providing an outline of AGE‐breakers and the potential anti‐glycation properties of some foodstuffs.Design/methodology/approach – Literature searches were conducted to find a link between common household spices, medicinal herbs, AGE and diabetes which could lead to practical home‐based recommendations for changes in a persons diet.Findings – Findings tend to indicate the potential of some dietary components to prevent and/or inhibit AGE formation. Thus, these dietary agents may be exploited for controlling AGE‐mediated diabetic pathological conditions and as possible natural protector of AGE formation in vivo. Consequently, the quest for new AGE inhibitors is considered of paramount importance which can be of therapeutic potential in patients with diabetes or age‐related diseases.Practical implications – Studies on the inhibition of AGE formation have received increasing recog...