Anti-Trypanosoma, anti-Leishmania and cytotoxic activities of natural products from Psidium brownianum Mart. ex DC. and Psidium guajava var. Pomifera analysed by LC-MS.

This study aims to identify the composition of extracts and fractions from Psidium brownianum and Psidium guajava through LC-MS, to evaluate its in vitro anti-parasitic and cytotoxic activity against Trypanosoma cruzi, Leishmania brasiliensis and L. infantum epismastigote and promastigote forms, as well as mammalian cells. The results showed the presence of chemical constituents in the two Psidium species as quercetin, myricetin and gallic acid derivatives. The P. brownianum extract and fractions showed low toxicity at all tested concentrations and all samples were effective at the concentration of 1000μg/mL against the parasites, with the extract being the most efficient against the L. infantum promastigote form. The ethanolic extract, and the flavonoid and tannic fractions, from P. guajava showed low toxicity for the fibroblasts. All samples showed effectiveness at the highest concentration tested and the extract was more effective against the promastigote forms tested. The results showed that the species Psidium brownianum and Psidium guajava demonstrated an anti-parasitic activity against the T. cruzi, L. brasiliensis and L. infantum parasite cell lines indicating these species as an alternative therapy given their efficacy in the in vitro assays performed, opening the possibility for new biological studies to further this knowledge through in vivo assays. PMID: 28935551 [PubMed - as supplied by publisher]
Source: Acta Tropica - Category: Infectious Diseases Authors: Tags: Acta Trop Source Type: research

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CONCLUSION: This promising therapy should be investigated for optimization in further studies with different cancer types and L. tropica may be designed to express antigens to enhance tumor antigen-specific responses, which may further improve efficacy and immune memory development. PMID: 32472473 [PubMed - as supplied by publisher]
Source: Breast Cancer - Category: Cancer & Oncology Authors: Tags: Breast Cancer Source Type: research
In this study, we reported the in vitro schistosomicidal activity of the R. graveolens extract (Rg) and its active fraction (Rg-FAE). Also, the characterization of Rg-FAE by UPLC-ESI-QTOF-MS analysis and its in vitro antileishmanial activity against Leishmania braziliensis were also performed. In vitro schistosomicidal assays were assessed against adult worms of S. mansoni, while cell viability against peritoneal macrophages was measured by MTT assay. Rg (100 μg/mL) exhibited noticeable schistosomicidal activity, causing 100% mortality and decreasing motor activity of all adult male and female schistosomes, but w...
Source: Evidence-based Complementary and Alternative Medicine - Category: Complementary Medicine Tags: Evid Based Complement Alternat Med Source Type: research
Publication date: Available online 10 November 2019Source: Veterinary ParasitologyAuthor(s): Fatemeh Khadir, Tahereh Taheri, Sima Habibzadeh, Farnaz Zahedifard, Elham Gholami, Maryam Heidari-Kharaji, Ahmad Oryan, Sima RafatiAbstractCutaneous leishmaniosis (CL) is a parasitic disease in animals and human with no satisfactory treatments and vaccination. Rapamycin is a potent inhibitor of mammalian target of rapamycin (mTOR) with various applications. Here, the effect of rapamycin alone or in combination with two other drugs, namely amphotericin B (AmB) and glucantime, was investigated against Leishmania tropica infection. In...
Source: Veterinary Parasitology - Category: Veterinary Research Source Type: research
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Source: Experimental Parasitology - Category: Parasitology Authors: Tags: Exp Parasitol Source Type: research
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Source: Evidence-based Complementary and Alternative Medicine - Category: Complementary Medicine Tags: Evid Based Complement Alternat Med Source Type: research
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Source: Evidence-based Complementary and Alternative Medicine - Category: Complementary Medicine Tags: Evid Based Complement Alternat Med Source Type: research
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Source: International Immunopharmacology - Category: Allergy & Immunology Authors: Tags: Int Immunopharmacol Source Type: research
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Source: Evidence-based Complementary and Alternative Medicine - Category: Complementary Medicine Tags: Evid Based Complement Alternat Med Source Type: research
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Source: International Journal of Infectious Diseases - Category: Infectious Diseases Authors: Tags: UMP. 564 Source Type: research
Background: Leishmaniasis is a neglected infectious-parasitic disease caused by protozoa of the genus Leishmania. This disease is endemic in 98 countries with an estimate number of 350 million people in risk of infection. Approved drugs for the treatment of cutaneous leishmaniasis have numerous limitations, such as toxicity, long treatment period, therapeutic failure, serious adverse effects and even death. Thus, it is necessary to investigate new drugs and efficient alternative therapies that ensure less prolonged treatments with few adverse effects.
Source: International Journal of Infectious Diseases - Category: Infectious Diseases Authors: Tags: UMP. 596 Source Type: research
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