Preliminary Phytochemical Screening of Five Plants as Possible Antileishmaniasis Control Agent (original) (raw)
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International Journal of TROPICAL DISEASE & Health
Leishmaniasis is a major public health problem globally. Visceral leishmaniasis is known to be fatal if left untreated, while cutaneous leishmaniasis is the most neglected. The first-line treatment of leishmaniasis is based on pentavalent antimonial drugs which are expensive, requiring inpatient treatment and toxic. The Plants containing active compounds against other protozoan diseases may offer alternatives against leishmania parasites. This study determined the in vitro antileishmanial activity of Olea europaea, Kigelia africana, Terminalia mollis, Croton macrostachyus and Bridella micrantha extracts. The plant samples were dried, pulverized into fine powders and extracted using ethanol at the Center for Traditional Medicine and Drugs Research, KEMRI. The in vitro assays were carried out at the Leishmania laboratory, Centre for Biotechnology Research and Development, KEMRI. In in- vitro assays the inhibitory concentrations (IC50) and Minimum Inhibition Concentration (MIC) on L. m...
Screening of six medicinal plant species for antileishmanial activity
Acta Pharmaceutica
This study is aimed to investigate the in vitro anti-leishmanial activity of ethanolic, aqueous or dichloromethane extracts of leaves, flowers, fruits or roots, of six medicinal plant species, namely, Nectandra megapotamica, Brunfelsia uniflora, Myrcianthes pungens, Anona muricata, Hymenaea stigonocarpa and Piper corcovandesis. After isolation and analysis of chemical components by ultra-high performance liquid chromatography-high-resolution tandem mass spectrometry (UHPLC-HRMS/MS), the extracts were also tested for toxicity in J774.A1 macrophages and human erythrocytes. Phenolic acids, flavonoids, acetogenins, alkaloids and lignans were identified in these extracts. Grow inhibition of promastigotes forms of Leishmania amazonensis and Leishmania braziliensis and the cytotoxicity in J774.A1 macrophages were estimated by the XTT method. The most promising results for L. amazonensis and L. braziliensis were shown by the ethanolic extract of the fruits of Hymenaea stigonocarpa and dichl...
Current clinical pharmacology, 2012
Plants and their extracts have been used traditionally against different pathologies, and in some poor regions they are the only therapeutic source for treatments and the presence of specific active secondary metabolites can be account for amelioration of clinical status of suffering individual. A series of ethnopharmacological surveys conducted in Brazil recorded the traditional use of plants against different pathologies and interestingly, some of them presented antileishmanial activity in vitro and in vivo, possibly due to their immunostimulatory, healing and microbicidal properties. Of note, Leishmania parasites can alter patient's immunological status, leading to the development of extensive skin and/or visceral alterations. Therefore, the extracts or secondary metabolites presented in plants that might be capable of modifying these pathological conditions can be attractive candidates in the development of new chemotherapeuticals against leishmaniosis.
Journal of Pharmacy & Pharmacognosy Research, 2023
Context: Cutaneous leishmaniasis is a disease of public health importance; treatment is based on the use of pentavalent antimonials with high toxicity and low efficacy; therefore, it´s necessary to search for therapeutic alternatives derived from natural products, based on the study of medicinal plants as a source of molecules with highly effective leishmanicidal potential. Aims: To carry out a systematic review between 2018 and 2022 on medicinal plants with potential leishmanicidal activity on parasite strains from the New World causing cutaneous leishmaniasis. Methods: The review study was conducted in four phases following the PRISMA methodology. First, research questions and objectives were formulated to establish the topic areas and construct the search algorithm. Second, a search was performed across different databases, including ScienceDirect, Scopus, PubMed, Web of Science, EBSCO, Taylor and Francis, and Scielo. Third, articles were chosen based on specific inclusion and exclusion criteria. Finally, the relevant information for the review was systematically organized. Results: The search yielded 163 articles, and 12 of them were selected as the basis for the construction of the review. Ethanolic and aqueous extracts stand out, as well as biocompounds such as terpenes and flavonoids. Antioxidant activity on reactive oxygen species was the most frequently cited. Conclusions: Promising terpene and flavonoid molecules with high antileishmanial activity (IC50 <2 μM or <10 μg/mL and SI >1) were identified in this study; these findings provide a scientific basis for the traditional use that communities have given to plants as a therapeutic source to treat cutaneous leishmaniasis in the New World.
Screening of In Vitro Antileishmanial Activity of Extracts of Selected Medicinal Plants
National Academy Science Letters, 2015
The chemotherapeutic intervention for discovering drugs against leishmaniasis suffers from limitations as toxicity, high cost and development of resistant strains of Leishmania. As a result of unprecedented increase in the number of newly diagnosed cases against leishmaniasis, development of drugs from medicinal plants is gaining widespread interest. Different solvent extracts from ten plants were colorimetrically tested against the promastigotes. In the present study, aqueous extract of all the plants gave some level of activity against the promastigotes. The aqueous extract of Solanum xanthocarpum gave IC 50 value of 110 lg ml-1 followed by ethanolic extract of Tephrosia purpurea with IC 50 value of 141 lg ml-1. Moderate antipromastigote activity with inhibition of parasite growth in the range of 30-40 % was witnessed in the extracts of Asparagus racemosus, Boerhaavia diffusa, Citrullus colocynthis, Spilanthes acmella and Thuja occidentalis. For quality determination and reproducibility of results the aqueous extract of S. xanthocarpum and ethanolic extract of T. purpurea were analyzed through HPLC and general profile of the extract was recorded. The aqueous extract of S. xanthocarpum was also subjected to UV-Vis spectrophotometry and FTIR analysis. The results of this study advocate the promotion of medicinal plant products for the isolation of new natural molecules for the treatment of leishmaniasis.
Medicinal Plants With Antileishmanial Properties: A Review Study
Pharmaceutical and Biomedical Research, 2020
Background: Leishmaniasis is an infectious disease caused by various species of the Leishmania parasites. An effective vaccine or drug to prevent the infestation or a suitable medication to cure the disease without side effects has not been provided yet. Objectives: The use of medicinal herbs in the treatment of many diseases, especially parasitic ones, dates back to prehistoric times. This article is a review study on these herbs used for the treatment of leishmaniasis. Methods: In this regard, we searched PubMed, Science Direct, and Google Scholar databases. We prepared this review on the treatment of cutaneous leishmaniasis with medicinal plants because of the prevalence of this disease, chemical drugs’ failure to fully control it, increase in the number of reports on drug resistance, and contradictory research on the side effects of synthetic drugs. Results: In general, the use of medicinal herbs for the treatment of various diseases has a long history. Because of Iran’s diverse...
Universal Journal of Pharmaceutical Research
Cutaneous leishmaniasis is one form of leishmaniasis that chiefly infected the poor sections of the society. The prototypical therapeutic interventions in vogue are handicapped due to toxicity and an alarming increase in drug resistance. Furthermore, the absence of vaccines has raised the quest for alternative therapies. So, the aim of our study was to assess the anti-leishmanial activity of Euphorbia cactus Ehrenb, Euphorbia ammak Forssk, Euphorbia inarticulate Schweinf, and Pergularia tomentosa L. The extracts of plants were prepared by maceration method and by Soxhlet extractor. The extracts were dried and re-dissolved in 2% dimethyl sulfoxide (DMSO) 1% solvent. Leishmania spp. cells were then tested with serial concentrations (15.6 μgml-1 to 500 μg ml-1 ) of the extracts, using the 3-(4,5-dimethylthazolk-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay. All experiments were performed in triplicate and analyzed by ANOVA test. The optical density values as measured by Enzyme-Li...
Evaluation of antileishmanial activity of South Indian medicinal plants against Leishmania donovani
Experimental parasitology, 2012
Infections due to protozoa of the genus Leishmania are a major worldwide health problem, with high endemicity in developing countries. The aim of this study was to evaluate the in vitro antileishmanial activity of the acetone and methanol leaf extracts of Anisomeles malabarica, flower of Gloriosa superba, leaf of Ocimum basilicum, leaf and seed of Ricinus communis against promastigotes form of Leishmania donovani. Antiparasitic evaluations of different plant crude extracts were performed on 96 well plates at 37°C for 24-48 h. Out of the 10 experimental plant extracts tested, the leaf methanol extracts of A. malabarica, and R. communis showed good antileishmanial activity (IC(50)=126±19.70 and 184±39.33 μg/mL), respectively against promastigotes. Effective antileishmanial activity was observed making these plants as good candidates for isolation of antiprotozoal compounds which could serve as new lead structures for drug development.
Recent researches in effective antileishmanial herbal compounds: narrative review
Parasitology Research, 2020
Leishmaniasis are neglected diseases and a public health problem; they are caused by protozoan species belonging to the genus Leishmania and mostly influences the poor populations in many developing countries. The lack of effective medications, and an approved vaccine, high toxicity and life-threatening side effects and many cases of drug resistance reported in different countries have resulted in the necessity to discover new, efficient, inexpensive, and safe antileishmanial compounds with less or no toxicity. This increase in consumer demand of natural herbal-derived plant extracts as alternative medicines continues despite the low scientific information to establish their efficacy and safety profiles. Various studies have been conducted so far concerning the application of herbal medicines for the treatment of leishmaniasis, but research on relatively effective and low toxic substances is still needed. In this review, we have summarized recent developments and reported studies concerning about herbal and naturally derived therapeutics in the treatment of leishmaniasis, conducted by several researchers worldwide. Some of these medical herbs with promising results have undergone prospective clinical researches, but many others have either not yet been explored. Recent articles described these medical herbs and their active and important molecules, including quinones, phenolic derivatives, lignans, tannins, terpenes, and oxylipins. We searched ISI Web of Science, PubMed, SID, Scholar, Scopus, and Science Direct, and articles published up to 2019 were included. The keywords of leishmaniasis and some words associated with herbal medicines and natural products were used in our search. This review can serve as a quick reference database for researchers.
Antileishmanial, Toxicity, and Phytochemical Evaluation of Medicinal Plants Collected from Pakistan
Leishmaniasis is an important parasitic problem and is in focus for development of new drugs all over the world. Objective of the present study was to evaluate phytochemical, toxicity, and antileishmanial potential of Jurinea dolomiaea, Asparagus gracilis, Sida cordata, and Stellaria media collected from different areas of Pakistan. Dry powder of plants was extracted with crude methanol and fractionated with n-hexane, chloroform, ethyl acetate, n-butanol, and water solvents in escalating polarity order. Qualitative phytochemical analysis of different class of compounds, that is, alkaloids, saponins, terpenoids, anthraquinones, cardiac glycosides, coumarins, phlobatannins, flavonoids, phenolics, and tannins, was tested. Its appearance was observed varying with polarity of solvent used for fractionation. Antileishmanial activity was performed against Leishmania tropica KWH23 promastigote. Potent antileishmanial activity was observed for J. dolomiaea methanol extract (IC50 = 10.9 ± 1.1 𝜇g/mL) in comparison to other plant extracts. However, J. dolomiaea “ethyl acetate fraction” was more active (IC50 = 5.3 ± 0.2 𝜇g/mL) against Leishmania tropica KWH23 among all plant fractions as well as standard Glucantime drug (6.0 ± 0.1 𝜇g/mL). All the plants extract and its derived fraction exhibited toxicity in safety range (LC50> 100) in brine shrimp toxicity evaluation assay.