title: Preliminary characterization of a Rhodnius prolixus hemolymph trypanolytic protein, this being a determinant of Trypanosoma rangeli KP1(+) and KP1(-) subpopulations' vectorial ability.
abstract: Rhodnius prolixus is the main Trypanosoma rangeli vector in several Latin-American countries and is susceptible to infection with KP1(+) strains; however, it presents an invasion-resistant response to KP1(-) strains. The present work has identified a trypanolytic protein against T. rangeli KP1(-) in the R. prolixus hemolymph which was fractioned with ammonium sulfate (following dialysis). The results revealed a protein component which did not depend on divalent cations for its biological function whilst keeping its trypanolytic activity at temperatures ranging from -20 masculineC to 37 masculineC, at 7.0 to 10.5 pH. The protein was partially purified by gel filtration chromatography and ionic exchange chromatography. The major component presented a molecular weight of around 79 kDa and an isoelectric point between 4.9 and 6.3 and may be directly related to hemolymph trypanolytic activity against T. rangeli KP1(-) populations.
authors.affiliation: Laboratorio de Investigaciones en Parasitología Tropical, Facultad de Ciencias, Universidad del Tolima, Ibagué, Colombia.
authors.forename: Ximena Carolina
authors.initials: XC
authors.lastname: Pulido
authors.forename: Gerardo
authors.initials: G
authors.lastname: Pérez
authors.forename: Gustavo Adolfo
authors.initials: GA
authors.lastname: Vallejo
mesh_terms: D000818:Animals; D002850:Chromatography, Gel; D002852:Chromatography, Ion Exchange; D004591:Electrophoresis, Polyacrylamide Gel; D006458:Hemolymph / Q000737:chemistry* / Q000469:parasitology; D007303:Insect Vectors / Q000469:parasitology*; D015800:Protozoan Proteins / Q000097:blood*; D012239:Rhodnius / Q000469:parasitology*; D013997:Time Factors; D014345:Trypanosoma / Q000737:chemistry*
chemical_list: D015800:Protozoan Proteins