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      Bovine viral diarrhea viruses differentially alter the expression of the protein kinases and related proteins affecting the development of infection and anti-viral mechanisms in bovine monocytes.

      Biochimica et Biophysica Acta

      Spectrometry, Mass, Electrospray Ionization, Animals, Proteomics, metabolism, isolation & purification, Proteins, Protein Kinases, virology, enzymology, Monocytes, In Vitro Techniques, pathogenicity, Diarrhea Virus 1, Bovine Viral, Cytopathogenic Effect, Viral, Chromatography, Liquid, Cattle, etiology, Bovine Virus Diarrhea-Mucosal Disease

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          Using a proteomics approach, we evaluated the effect of cytopathic (cp), and non-cytopathic (ncp) bovine viral diarrhea viruses (BVDV) on the expression of protein kinases and related proteins in bovine monocytes. Proteins were isolated from membrane and cytosolic fractions with the differential detergent fractionation (DDF) method and identified with 2D-LC ESI MS2. Of approximately 10,000 proteins identified, 378 proteins had homology with known protein kinases or related proteins. Eighteen proteins involved in cell differentiation and activation, migration, anti-viral mechanisms (interferon/apoptosis), biosynthesis, sugar metabolism and oncogenic transformation were significantly altered in BVDV-infected monocytes compared to the uninfected controls. Six proteins, mostly related to cell migration, anti-viral mechanisms, sugar metabolism and possibly tumor resistance were differentially expressed between the ncp and cp BVDV-infected monocytes. Particularly, the expression of the receptor of activated C kinase (RACK), of pyridoxal kinase (PK), diacyglycerol kinase (DGK) and Brutons tyrosine kinase (BTK) was decreased in monocytes infected with cp BVDV compared to ncp BVDV, possibly contributing to the cytopathic effect of the virus. This and other findings are discussed in view of the possible role the identified proteins play in the development of viral infection and oncogenic transformation of cells.

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