title: SDS-PAGE and Western blot of urinary proteins in dogs with leishmaniasis.
abstract: Canine leishmaniasis is an endemic disease in the Mediterranean area caused by the protozoan Leishmania infantum, which usually produces renal failure. Sodium dodecyl sulphate polyacrylamide gel electrophoresis and Western blot using antibodies to IgG and IgA from dogs were carried out in the urine of 22 dogs with leishmaniasis diagnosed by ELISA and confirmed by PCR, and 20 healthy dogs. The results were compared to renal function laboratory tests and to those from a histopathological study of the kidneys from sick animals that died naturally or were euthanized. Five different bands with molecular weights ranging from 10 to 110 kDa were obtained from the electrophoresis of the urine of healthy dogs. 33.5% of total proteins corresponded to low molecular weight proteins and the other proteins had middle and high molecular weights. However, in the group with leishmaniasis, a maximum of 11 different bands with molecular weights ranging from 10 kDa to 150 kDa were displayed in the electrophoresis of the urine. The urine electrophoretic pattern in the sick dogs was classified as mixed (proteins with high and low molecular weights) because low molecular weight proteins made up 57.9% and the rest of the proteins had middle and high molecular weights. In Western blot, none of the healthy dogs showed excretion of IgG and/or IgA, whereas IgG and IgA were detected in the Western blot of urine of 68% and 55% respectively of dogs with leishmaniasis. The results obtained in the leishmaniasis group agreed with glomerular and tubular damage, which were confirmed by the histopathological findings.
authors.affiliation: Departamento de Medicina y Sanidad Animal, Facultad de Veterinaria, Universidad de Extremadura, Avda. Universidad s/n, 10004 Cáceres, Spain. zaragoza@unex.es
authors.forename: Concepción
authors.initials: C
authors.lastname: Zaragoza
authors.forename: Rafael
authors.initials: R
authors.lastname: Barrera
authors.forename: Francisco
authors.initials: F
authors.lastname: Centeno
authors.forename: Jose A
authors.initials: JA
authors.lastname: Tapia
authors.forename: Esther
authors.initials: E
authors.lastname: Durán
authors.forename: Marta
authors.initials: M
authors.lastname: González
authors.forename: M Cinta
authors.initials: MC
authors.lastname: Mañé
mesh_terms: D000818:Animals; D000913:Antibodies, Protozoan / Q000097:blood / Q000652:urine; D015153:Blotting, Western; D016022:Case-Control Studies; D004283:Dog Diseases / Q000175:diagnosis* / Q000473:pathology / Q000652:urine*; D004285:Dogs; D004591:Electrophoresis, Polyacrylamide Gel; D004797:Enzyme-Linked Immunosorbent Assay; D005260:Female; D007070:Immunoglobulin A / Q000097:blood / Q000652:urine; D007074:Immunoglobulin G / Q000097:blood / Q000652:urine; D007668:Kidney / Q000473:pathology; D018314:Leishmania infantum / Q000502:physiology; D007896:Leishmaniasis / Q000150:complications / Q000175:diagnosis / Q000652:urine* / Q000662:veterinary*; D008297:Male; D008970:Molecular Weight; D016133:Polymerase Chain Reaction; D011506:Proteins / Q000032:analysis* / Q000737:chemistry; D051437:Renal Insufficiency / Q000150:complications / Q000175:diagnosis / Q000652:urine / Q000662:veterinary
chemical_list: D000913:Antibodies, Protozoan; D007070:Immunoglobulin A; D007074:Immunoglobulin G; D011506:Proteins