4 research outputs found
AnĂĄlisis de 24 casos de Tumor VenĂ©reo Transmisible (TVT) en dos clĂnicas veterinarias de Florencia, Colombia
The present study analyses the results of 24 complete clinical records of canine transmissible venereal tumour (TVT) obtained in two veterinary clinics in Florencia, CaquetĂĄ during 2014 and 2018. The effectiveness of treatments using vincristine sulphate on a weekly basis was greater than 65% after four sessions. Those that used only vincristine sulphate had 50% effectiveness, while those who implemented some type of adjuvant achieved 70% of effectiveness. However, the use of YatrĂ©n (Chiniofon) as immunostimulant was not effective in 3/5 cases. Results showed treatment sessions should continue until after there is no visual evidence of the lesions to eliminate all tumour cells.El presente estudio analiza los resultados de 24 historias clĂnicas completas de tumor venĂ©reo transmisible canino (TVT) obtenidas en dos clĂnicas veterinarias de Florencia, CaquetĂĄ entre 2014 y 2018. La efectividad de los tratamientos con sulfato de vincristina en forma semanal fue superior al 65% despuĂ©s de cuatro sesiones. Los que utilizaron solo el sulfato de vincristina tuvieron 50% de efectividad, mientras que quienes implementaron algĂșn tipo de adyuvante lograron el 70% de efectividad. Sin embargo, el uso de YatrĂ©n (Chiniofon) como inmunoestimulante no fue efectivo en 3/5 casos. Los resultados mostraron que las sesiones de tratamiento deben continuar hasta que no haya evidencia visual de las lesiones a fin de eliminar todas las cĂ©lulas tumorales
Inmunodetección por peroxidasa de células de ganglio sensorial infectadas por virus de rabia
An immunoperoxidase ABC technique was developed to detect rabies virus in dorsal root ganglion cells. This paper presents the standarization of the immunoperoxidase ABC technique which uses the antirabies conjugate produced by the Colombian lnstituto Nacional de Salud. Antibody dilution normally used in the fluorescence routine technique shows an excesive background in the ABC assay. We discuss the possible reasons and presenta protocol that minimizes the high background in the ABC immunoassay.Con el objetivo de establecer una tĂ©cnica de inmunocitoquimica por avidina-peroxidasa biotinilada para la detecciĂłn de cĂ©lulas infectadas in vitro por el virus rĂĄbico, se usaron cultivos de ganglio de la raĂz dorsal de ratĂłn. En este trabajo se presentan los resultados del proceso de estandarizaciĂłn de la inmunoperoxidasa, en la que tambiĂ©n se usa el conjugado antirrĂĄbico producido en el lnstituto Nacional de Salud. Las diluciones de anticuerpo, que normalmente se usan en la inmunofluorescencia, muestran un excesivo ruido de fondo en la inmunoperoxidasa. Se discuten las posibles razones de este artefacto y se presenta un protocolo para la detecciĂłn por inmunoperoxidasa de cĂ©lulas de ganglio sensorial infectadas in vitro por virus de rabia
DehydroÂleucodin: a guaiane-type sesquiterpene lactone
DehydroÂleucodin [systematic name: (1S,6S,2R)-9,13-dimethÂyl-5-methylÂene-3-oxatricycloÂ[8.3.0.02,6]trideca-9,12-diene-4,11-dione], C15H16O3, is a guanolide isolated from Artemisia douglasiana. The fused-ring system contains a seven-membered ring that adopts a chair conformation, a fused planar cycloÂpentenone ring and a five-membered lactone ring fused in envelope conformation. The absolute structure determined by X-ray analysis agrees with that previously assigned to this compound by NMR studies [Bohlmann & Zdero (1972 â¶). TetraÂhedron Lett.
13, 621â624] and also with that of leucodine, a closely related guaianolide [Martinez et al. (1988 â¶). J. Nat. Prod.
51, 221â228]
Rabies virus infection of cultured adult mouse dorsal root ganglion neurons
An in vitro model of adult dorsal root ganglion neurons infection by rabies virus is described. Viral marked neurotropism is observed, and the percentage and the degree of infection of the neurons is higher than in non neuronal cells, even if neurons are the minority of the cells in the culture. The neuritic tree is also heavily infected by the virus