Characterization of poly- and monoclonal antibodies to physalis mottle (tymo) virus.

Polyclonal antibodies were raised against the Physalis mottle virus (PhMV) and its denatured coat protein (PhMV-P). Analysis of the reactivity of the polyclonal antibodies with tryptic peptides of PhMV-P in dot-blot assays revealed that many of the epitopes were common to intact virus and denatured coat protein. Five monoclonal antibodies to the intact virus were obtained using hybridoma technology. These monoclonal antibodies reacted well with the denatured coat protein. Epitope analysis suggested that probably these monoclonal antibodies recognize overlapping epitopes. This was substantiated by epitope mapping using the CNBr digest of PhMV-P in western blots. All the five monoclonals recognized the N-terminal 15 K fragment. Attempts to further delineate the specific region recognized by the monoclonals by various enzymatic cleavages resulted in the loss of reactivity in all the cases. The results indicate that these monoclonals probably recognize epitopes within the N-terminal 15 K fragment of the coat protein.

Evaluación diagnóstica de infecciones de cuello uterino asociadas a infección por virus papiloma humano / Diagnostic evaluation of cervix uteri infections associated with infection caused by human papilloma virus

El objetivo de este trabajo es demostrar la presencia de proteínas de virus papilomas humano (HPV) en biopsias de cuello uterino diagnosticadas histológicamente como cervicopatías de origen viral. Se escogieron 38 biopsias cervicales que cumplían con los criterios mencionados por Toki y Yajima para diagnóstico de HPV. Las biopsias provienen de archivos de placas del programa de detección de cáncer cérvico-uterino de las áreas Norte y Oriente de Santiago. Se empleó la técnica de inmunoperoxidasa usando el método ABC (complejo avidina-biotina-peroxidasa), utilizando como anticuerpo primario, uno policlonal diluido a 1:200, que reacciona con todas las variedades de virus papiloma. Veinte de las 38 biopsias (52,9%) presentan antígenos virales en núcleo de las capas superficiales del epitelio escamoso, en cantidad suficiente como para ser reconocidos por la sensibilidad del método. Este porcentaje es comparable a lo descrito en la literatura y que varía entre un 40% y un 62%