98%
921
2 minutes
20
Trypanothione reductase (TR) catalyzes the NADPH-dependent reduction of trypanothione disulfide (1). TR plays a central role in the trypanosomatid parasite's defense against oxidative stress and has emerged as a promising target for antitrypanosomal drugs. We describe the synthesis and activity of dethiotrypanothione and analogues (2-4) as inhibitors of Trypanosoma cruzi TR. The syntheses of these macrocycles feature ring-closing olefin metathesis (RCM) reactions catalyzed by ruthenium catalyst 17. Derivative 4 is our most potent inhibitor with a Ki=16 microM.
Download full-text PDF |
Source |
---|---|
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC2528058 | PMC |
http://dx.doi.org/10.1021/jo062597s | DOI Listing |
Biometals
August 2025
Facultad de Ciencias, Universidad Antonio Nariño-Sede Circunvalar, Cra. 3 Este # 47A - 15, Bogotá, D.C., Colombia.
Chagas disease remains a major public health challenge, and there is a need for new therapeutic agents. N-heterocyclic carbene (NHC) complexes, particularly those linked to silver or gold, have shown significant anticancer, antimicrobial, and antiparasitic activities. This study aimed to evaluate the efficacy of four NHC compounds (QMT3, QMT4, QMT7, and QMT8) against Trypanosoma cruzi, the causative agent of Chagas disease.
View Article and Find Full Text PDFInt J Parasitol Drugs Drug Resist
August 2025
Departamento de Ciencias Biomédicas, Facultad de Veterinaria, Universidad de León, Campus de Vegazana s/n, 24007, León, Spain; Instituto de Biomedicina (IBIOMED), Universidad de León, Campus de Vegazana s/n, 24007, León, Spain. Electronic address:
Visceral leishmaniasis caused by Leishmania infantum and Leishmania donovani is one of the neglected tropical diseases (NTDs) caused by trypanosomatids with treatment options limited to outdated drugs often causing adverse effects and promoting drug resistance. Previous antileishmanial drug discovery campaigns have identified nitroheterocyclic molecules with high efficacy and a high selectivity index. Therefore, we have evaluated on our screening platform of fluorescent L.
View Article and Find Full Text PDFSci Rep
August 2025
Department of Biotechnology, Abdul Wali Khan University Mardan, Mardan, KP, Pakistan.
Cutaneous leishmaniasis, a neglected tropical disease (NTD) caused by Leishmania tropica, Leishmania major and other members of the same species, poses significant challenges in the public health sector, especially in developing countries. The limitations of current treatments, including toxicity, resistance, availability, and cost effectiveness, necessitate the development of novel therapeutics. This study investigated the leishmanicidal potential of five Thiadiazine thione derivatives (THTT) against L.
View Article and Find Full Text PDFACS Omega
July 2025
Laboratório de Bioquímica de Tripanosomatídeos, Instituto Oswaldo Cruz/Fundação Oswaldo Cruz, Rio de Janeiro 21040-360, Brazil.
Visceral leishmaniasis, caused by the parasite , is a life-threatening disease with limited therapeutic options that are often associated with toxicity and resistance. In this study, we investigated the leishmanicidal effects of silibinin, a key flavonolignan from , against both the promastigote and intracellular amastigote forms of . Mechanistically, silibinin inhibits trypanothione reductase (TR), disrupting the redox balance in the parasite and causing cell death.
View Article and Find Full Text PDFPharmaceuticals (Basel)
June 2025
Programa de Pós-Graduação em Ciências Farmacêuticas, Faculdade de Farmácia, Universidade Federal do Rio de Janeiro, Rio de Janeiro 21941-902, RJ, Brazil.
: The anti- potential of and its derivatives, such as curcuminoids, is well-established, yet their mechanisms of action remain underexplored. This study investigates the inhibitory effects of extracts and curcumin on arginase, a key enzyme in polyamine and trypanothione biosynthesis, and evaluates their antiparasitic activity. : Extracts were prepared via rhizome successive maceration with hexane (HEXCURC), dichloromethane (DCCURC), and ethanol (ETOHCURC) and chemically characterized by a combination of chromatographic and spectrometric methods.
View Article and Find Full Text PDF