PubMed · 2996207
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S J Pritchett. 1985-07-27. New agent causing hepatitis.. https://doi.org/10.1136/vr.117.4.94-b
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The adenovirus type 2 protease (EP) was expressed by infecting insect cells with a recombinant baculovirus. Immunoblot and activity analysis showed EP to be present in both the nucleus and cytoplasm. While the insect cell expressed EP was more soluble than the Escherichia coli expressed EP, its activity was one quarter of the latter, suggesting that eukaryotic postsynthetic modifications are not essential for enzyme activity. EP inactivated a cytoplasmic cathepsin-like baculovirus-encoded cysteine protease which carries a single EP cleavage site and which was capable of digesting most adenovirus structural proteins in vitro. In addition to cleavage of the baculovirus protease, the adenovirus EP was also able to cleave ovalbumin and canine adenovirus protein pre-VII, in the absence of activating peptide. EP activation therefore may occur by means of factors other than the specific activating peptide.
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Two cases of H.c.c. which occurred in winter 1987 in Vienna are described. Case one was a female Chow-Chow, 8 weeks of age, that died from the peracute form of the disease. The diagnosis was confirmed by histology and direct immunofluorescence. Case two, a 9-month old female Kuvacz, showed clinical signs of the subacute form of H.c.c. She was hospitalized and therapy was successful. The disease was diagnosed by the typical clinical signs and the raise of antibodies in paired serum samples. Etiology, clinical signs and immunology of H.c.c. are discussed.