RRC ID 52260
Author Murata Y, Sugi T, Weiss LM, Kato K.
Title Identification of compounds that suppress Toxoplasma gondii tachyzoites and bradyzoites.
Journal PLoS One
Abstract Drug treatment for toxoplasmosis is problematic, because current drugs cannot eradicate latent infection with Toxoplasma gondii and can cause bone marrow toxicity. Because latent infection remains after treatment, relapse of infection is a problem in both infections in immunocompromised patients and in congenitally infected patients. To identify lead compounds for novel drugs against Toxoplasma gondii, we screened a chemical compound library for anti-Toxoplasma activity, host cell cytotoxicity, and effect on bradyzoites. Of 878 compounds screened, 83 demonstrated >90% parasite growth inhibition. After excluding compounds that affected host cell viability, we further characterized two compounds, tanshinone IIA and hydroxyzine, which had IC50 values for parasite growth of 2.5 μM and 1.0 μM, respectively, and had no effect on host cell viability at 25 μM. Both tanshinone IIA and hydroxyzine inhibited parasite replication after invasion and both reduced the number of in vitro-induced bradyzoites, whereas, pyrimethamine, the current therapy, had no effect on bradyzoites. Both tanshinone IIA and hydroxyzine are potent lead compounds for further medicinal chemistry. The method presented for evaluating compounds for bradyzoite efficacy represents a new approach to the development of anti-Toxoplasma drugs to eliminate latency and treat acute infection.
Volume 12(6)
Pages e0178203
Published 2017-6-13
DOI 10.1371/journal.pone.0178203
PII PONE-D-16-42334
PMID 28609444
PMC PMC5469451
MeSH Abietanes / chemistry Abietanes / pharmacology Animals Antiprotozoal Agents / chemistry Antiprotozoal Agents / isolation & purification Antiprotozoal Agents / pharmacology* Cell Line Chlorocebus aethiops Host-Parasite Interactions / drug effects Humans Hydroxyzine / chemistry Hydroxyzine / pharmacology Molecular Structure Pyrimethamine / chemistry Pyrimethamine / pharmacology Toxoplasma / drug effects* Toxoplasma / physiology Toxoplasmosis / drug therapy* Toxoplasmosis / parasitology Toxoplasmosis, Animal / drug therapy* Toxoplasmosis, Animal / parasitology Vero Cells
IF 2.74
Times Cited 14
Resource
Human and Animal Cells Vero(RCB0001)