title: Calbindin D28k distribution in neurons and reactive gliosis in cerebellar cortex of natural Rabies virus-infected cattle.
abstract: Rabies has been an enigmatic disease because microscopic findings in central nervous system tissues do not always correlate well with the severity of the clinical illness. Immunohistochemical staining of the calcium-binding protein calbindin (specifically CbD28k) seems to be the technique most used to identify Purkinje neurons under normal and pathological conditions. In the present work, we evaluated CbD28k immunoreactivity in the cerebellar cortex of normal and natural Rabies virus (RABV)-infected cattle. We examined brains from 3 normal cows and from 6 crossbreed cattle with a histologic diagnosis of rabies. Samples were taken from the cerebral cortex, cerebellum, hippocampus, and brainstem. Immunohistochemistry was carried out using the following primary antibodies: anti-RABV, anti-GFAP, and anti-CbD28k. In the cerebellar cortex, RABV infection caused the loss of CbD28k immunostaining in Purkinje cells; some large interneurons in the granular layer maintained their positive CbD28k immunoreaction. The identification of this loss of CbD28k reactivity in cerebellar Purkinje cells of RABV-infected cattle presents a potentially valuable tool to explore the impairment of Ca(2+) homeostasis. In addition, this may become a useful method to identify specific molecular alterations associated with the higher prevalence of Negri bodies in Purkinje cells of cattle. Furthermore, we detected the presence of rabies viral antigens in different regions of the central nervous system, accompanied by microglial proliferation and mild reactive astrogliosis.
authors.affiliation: Departments of Pathology (Verdes, Sabalsagaray, Okada, Moraña), Faculty of Veterinary, University of the Republic, Montevideo, UruguayMolecular and Cellular Biology (Biophysics) (Verdes, Calliari), Faculty of Veterinary, University of the Republic, Montevideo, UruguayLaboratory of Veterinary Pathology Diagnosis, University of Brasilia, Brasilia, DF, Brazil (Sant'Ana)Laboratory of Veterinary Pathology, Federal University of Santa María, Santa Maria, Rio Grande do Sul, Brazil (de Barros) jmverdes@fvet.edu.uy.
authors.forename: José Manuel
authors.initials: JM
authors.lastname: Verdes
authors.affiliation: Departments of Pathology (Verdes, Sabalsagaray, Okada, Moraña), Faculty of Veterinary, University of the Republic, Montevideo, UruguayMolecular and Cellular Biology (Biophysics) (Verdes, Calliari), Faculty of Veterinary, University of the Republic, Montevideo, UruguayLaboratory of Veterinary Pathology Diagnosis, University of Brasilia, Brasilia, DF, Brazil (Sant'Ana)Laboratory of Veterinary Pathology, Federal University of Santa María, Santa Maria, Rio Grande do Sul, Brazil (de Barros).
authors.forename: Fabiano José Ferreira
authors.initials: FJ
authors.lastname: de Sant'Ana
authors.affiliation: Departments of Pathology (Verdes, Sabalsagaray, Okada, Moraña), Faculty of Veterinary, University of the Republic, Montevideo, UruguayMolecular and Cellular Biology (Biophysics) (Verdes, Calliari), Faculty of Veterinary, University of the Republic, Montevideo, UruguayLaboratory of Veterinary Pathology Diagnosis, University of Brasilia, Brasilia, DF, Brazil (Sant'Ana)Laboratory of Veterinary Pathology, Federal University of Santa María, Santa Maria, Rio Grande do Sul, Brazil (de Barros).
authors.forename: María Jesús
authors.initials: MJ
authors.lastname: Sabalsagaray
authors.affiliation: Departments of Pathology (Verdes, Sabalsagaray, Okada, Moraña), Faculty of Veterinary, University of the Republic, Montevideo, UruguayMolecular and Cellular Biology (Biophysics) (Verdes, Calliari), Faculty of Veterinary, University of the Republic, Montevideo, UruguayLaboratory of Veterinary Pathology Diagnosis, University of Brasilia, Brasilia, DF, Brazil (Sant'Ana)Laboratory of Veterinary Pathology, Federal University of Santa María, Santa Maria, Rio Grande do Sul, Brazil (de Barros).
authors.forename: Kosuke
authors.initials: K
authors.lastname: Okada
authors.affiliation: Departments of Pathology (Verdes, Sabalsagaray, Okada, Moraña), Faculty of Veterinary, University of the Republic, Montevideo, UruguayMolecular and Cellular Biology (Biophysics) (Verdes, Calliari), Faculty of Veterinary, University of the Republic, Montevideo, UruguayLaboratory of Veterinary Pathology Diagnosis, University of Brasilia, Brasilia, DF, Brazil (Sant'Ana)Laboratory of Veterinary Pathology, Federal University of Santa María, Santa Maria, Rio Grande do Sul, Brazil (de Barros).
authors.forename: Aldo
authors.initials: A
authors.lastname: Calliari
authors.affiliation: Departments of Pathology (Verdes, Sabalsagaray, Okada, Moraña), Faculty of Veterinary, University of the Republic, Montevideo, UruguayMolecular and Cellular Biology (Biophysics) (Verdes, Calliari), Faculty of Veterinary, University of the Republic, Montevideo, UruguayLaboratory of Veterinary Pathology Diagnosis, University of Brasilia, Brasilia, DF, Brazil (Sant'Ana)Laboratory of Veterinary Pathology, Federal University of Santa María, Santa Maria, Rio Grande do Sul, Brazil (de Barros).
authors.forename: José Antonio
authors.initials: JA
authors.lastname: Moraña
authors.affiliation: Departments of Pathology (Verdes, Sabalsagaray, Okada, Moraña), Faculty of Veterinary, University of the Republic, Montevideo, UruguayMolecular and Cellular Biology (Biophysics) (Verdes, Calliari), Faculty of Veterinary, University of the Republic, Montevideo, UruguayLaboratory of Veterinary Pathology Diagnosis, University of Brasilia, Brasilia, DF, Brazil (Sant'Ana)Laboratory of Veterinary Pathology, Federal University of Santa María, Santa Maria, Rio Grande do Sul, Brazil (de Barros).
authors.forename: Claudio Severo Lombardo
authors.initials: CS
authors.lastname: de Barros
mesh_terms: D000818:Animals; D001253:Astrocytes / Q000473:pathology / Q000821:virology; D064092:Calbindin 1 / Q000378:metabolism*; D002118:Calcium / Q000378:metabolism; D002417:Cattle; D002418:Cattle Diseases / Q000175:diagnosis* / Q000821:virology; D002525:Cerebellar Cortex / Q000473:pathology* / Q000821:virology; D005260:Female; D005904:Glial Fibrillary Acidic Protein / Q000276:immunology; D006706:Homeostasis; D007150:Immunohistochemistry / Q000662:veterinary; D008590:Meningoencephalitis / Q000175:diagnosis / Q000662:veterinary / Q000821:virology; D011818:Rabies / Q000175:diagnosis / Q000662:veterinary* / Q000821:virology; D012261:Ribonucleoproteins / Q000276:immunology; D014764:Viral Proteins / Q000276:immunology
chemical_list: D064092:Calbindin 1; D005904:Glial Fibrillary Acidic Protein; D012261:Ribonucleoproteins; D014764:Viral Proteins; D002118:Calcium
keywords: Calbindin; GABAergic neurons; Purkinje cells; calcium homeostasis; cattle; cerebellum; gliosis; rabies