Androgens exert a cysticidal effect upon Taenia crassiceps by disrupting flame cell morphology and function
Por:
Ambrosio J.R., Valverde-Islas L., Nava-Castro K.E., Palacios-Arreola M.I., Ostoa-Saloma P., Reynoso-Ducoing O., Escobedo G., Ruíz-Rosado A., Dominguez-Ramírez L., Morales-Montor J.
Publicada:
15 jun 2015
Resumen:
The effects of testosterone (T4) and dihydrotestosterone (DHT) on the survival of the helminth cestode parasite Taenia crassiceps, as well as their effects on actin, tubulin and myosin expression and their assembly into the excretory system of flame cells are described in this paper. In vitro evaluations on parasite viability, flow cytometry, confocal microscopy, video-microscopy of live flame cells, and docking experiments of androgens interacting with actin, tubulin, and myosin were conducted. Our results show that T4 and DHT reduce T. crassiceps viability in a dose- and time-dependent fashion, reaching 90% of mortality at the highest dose used (40 ng/ml) and time exposed (10 days) in culture. Androgen treatment does not induce differences in the specific expression pattern of actin, tubulin, and myosin isoforms as compared with control parasites. Confocal microscopy demonstrated a strong disruption of the parasite tegument, with reduced assembly, shape, and motion of flame cells. Docking experiments show that androgens are capable of affecting parasite survival and flame cell morphology by directly interacting with actin, tubulin and myosin without altering their protein expression pattern. We show that both T4 and DHT are able to bind actin, tubulin, and myosin affecting their assembly and causing parasite intoxication due to impairment of flame cell function. Live flame cell video microscopy showing a reduced motion as well changes in the shape of flame cells are also shown. In summary, T4 and DHT directly act on T. crassiceps cysticerci through altering parasite survival as well as the assembly and function of flame cells. © 2015 Ambrosio et al. This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Filiaciones:
Ambrosio J.R.:
Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, Mexico
Valverde-Islas L.:
Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, Mexico
Nava-Castro K.E.:
Univ Nacl Autonoma Mexico, Ctr Ciencias Atmosfera, Dept Ciencias Ambientales, Mexico City 04510, DF, Mexico
Palacios-Arreola M.I.:
Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, Mexico
Ostoa-Saloma P.:
Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, Mexico
Reynoso-Ducoing O.:
Univ Nacl Autonoma Mexico, Fac Med, Dept Microbiol & Parasitol, Mexico City 04510, DF, Mexico
Escobedo G.:
Univ Nacl Autonoma Mexico, Fac Med, Unidad Med Expt, Mexico City 04510, DF, Mexico
Ruíz-Rosado A.:
Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, Mexico
Dominguez-Ramírez L.:
Departmento de Ciencias Químico-Biológicas, Escuela de Ciencias, Universidad de Las Américas Puebla, Santa Catarina Mártir, Cholula, Puebla, Mexico
Morales-Montor J.:
Univ Nacl Autonoma Mexico, Inst Invest Biomed, Dept Inmunol, Mexico City 04510, DF, Mexico
Gold
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