Nature-derived Alkaloids As a Promising Bioactive Compound in Drug Discovery to Meet Global Leishmania Needs

Fatemeh Sharifi,Neda Mohamadi,Ardavan Abiri,Iraj Sharifi,Majid Fasihi Harandi,Fariba Sharififar

Letters in Drug Design & Discovery（2024）

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Abstract

Background: Natural products have been important resources for potential drug development. Among the many classes of natural products, alkaloids have the most therapeutic applications. Treatment of leishmaniasis by chemical drugs remains a challenge because of toxic side effects, limited efficacy, and drug resistance. This review focuses to embrace all researches on leishmanicidal alkaloids over a specific range of time, with special consideration the molecular mechanism of action, and structure-related activity. Methods: All publications (in English) from Web of Science, PubMed, Science Direct, Scopus, and Google Scholar from 2000-2021 using a variety of keywords such as natural alkaloids, herbal alkaloids, marine alkaloids along with leishmaniasis were included in the present study. In this summary, the focus is mainly on natural alkaloids of plant, mineral, marine origin, etc., which have empirically demonstrated the antileishmanial effect. Results: Fourteen categories of alkaloids with anti-leishmaniasis activity were extracted from the articles. The highest number of alkaloids belonged to isoquinoline, indole, and quinoline alkaloids (21.78%, 20.67%, and 16.48% respectively). This review indicated that the mentioned alkaloids are able to inhibit the proliferation of parasites, the respiratory chain and protein synthesis, arrest the cell cycle, disrupt the mitochondrial membrane integrity, inhibit leishmanial topoisomerase, induce mitochondrial dysfunction, and changes in the parasite morphology. Discussion: The present study highlighted antileishmanial alkaloids that are active against different species of Leishmania in vitro and some of them are also active in visceral and cutaneous leishmaniasis models. However, more clinical studies are needed to clarify the anti-leishmanial activity of alkaloids against leishmania in detail. Conclusion: Among the reported compounds, two main classes of alkaloids including isoquinoline and indole alkaloids cover a wider range of anti-parasitic compounds, and structure-activity relationships (SAR) studies of these molecular skeletons may be good lead compounds and afford the structural clues to develop novel medicines with more selective therapeutic profiles.

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Key words

Herbal medicine,alkaloids,visceral leishmania,cutaneous leishmaniasis,mechanism of action,isoquinoline,indole alkaloids

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