AUTHOR=Mota Caroline Martins , Santiago Fernanda Maria , Cardoso Mariana de Resende Damas , Rostkowska Cristina , de Oliveira Taísa Carrijo , Silva Deise Aparecida de Oliveira , Pirovani Carlos Priminho , Mineo Tiago Wilson Patriarca , Mineo José Roberto 

TITLE=Acetonic Fraction of Bidens pilosa Enriched for Maturase K Is Able to Control Cerebral Parasite Burden in Mice Experimentally Infected With Toxoplasma gondii

JOURNAL=Frontiers in Veterinary Science

VOLUME=6

YEAR=2019

URL=https://www.frontiersin.org/journals/veterinary-science/articles/10.3389/fvets.2019.00055

DOI=10.3389/fvets.2019.00055

ISSN=2297-1769

ABSTRACT=<p><italic>Toxoplasma gondii</italic> infection can cause abortions or congenital infection for a vast number of domestic animals and humans, leading to economic loss in veterinary sciences, as well as severe consequences for immunocompromised patients. <italic>Bidens pilosa</italic> Linné has been used in ethnopharmacology for treatment of diseases, as malaria, diabetes and hepatitis, in addition to its use as antioxidant, antiallergic, anti-inflammatory, and antiviral. The components of this plant have never been studied before for treatment of toxoplasmosis, and the conventional drugs currently used to treat this disease have high degree of toxicity. Thus, the aim of this study was to evaluate the effect of <italic>B. pilosa</italic> against <italic>T. gondii</italic>, by analyzing a total extract of this plant in parallel with a fraction obtained by precipitation in acetone. Also, it was assessed if the acetonic fraction could present lectinic activity, followed by its identification by mass spectrometry. It was observed with the experimental models designed that both total extract and acetonic fraction of <italic>B. pilosa</italic> were able to control <italic>T. gondii</italic> infection by <italic>in vitro</italic> and <italic>in vivo</italic> experiments, in addition to their low toxicity to host cells. Both total extract and acetonic fraction of this plant display capacity to impair replication of <italic>T. gondii</italic> tachyzoites. Interesting, the <italic>B. pilosa</italic> acetonic fraction treatment for 10 days after infection decreases significantly the number of <italic>T. gondii</italic> brain cyst in comparison with controls. The protein isolated from <italic>B. pilosa</italic> acetonic fraction was characterized as a novel lectin identified as maturase K. Taken together, these findings open new perspectives to treat patients infected by <italic>T. gondii</italic>. Future studies will be necessary to investigate the precise mechanism underlying the control of <italic>T. gondii</italic> infection to impair the replication of this parasite in the host cells after treatment with <italic>B. pilosa</italic> maturase K.</p>