ABSTRACT. Cytochrome P450 3A (CYP3A) is the major subfamily of CYP, one of the most important metabolizing enzymes for drugs in humans and other mammals. We found two novel CYP3A genes, CYP3A131 and CYP3A132 in domestic cats (Felis catus). Both feline CYP3A proteins consist of 504 deduced amino acids and show high identity with canine CYP3A homologues and those of some artiodactyls. CYP3A131 transcripts were expressed predominantly in liver and small intestine, and to a negligible extent in other tissues, including brain, heart, kidney and lung. CYP3A132 expression was only detected in liver with much lesser amount. These results suggest the possible major role of CYP3A131 in xenobiotic metabolism including first-pass effects in domestic cats.

ABSTRACT. Cytochrome P450 2D (CYP2D) is one of the major metabolizing enzymes for drugs in humans and other mammals. Although domestic cats (Felis catus) are the most common companion animal in many countries, the properties of their drug-metabolizing system are largely unknown. We determined the complete cDNA sequence of the CYP2D open reading frame (1,500 bp) with both 5'-and 3'-untranslated regions in domestic cats. Feline CYP2D consists of 500 deduced amino acids and shows high homology with CYP2Ds of primates and rodents, particularly with the canine CYP2D homologue, and was designated as CYP2D6 based on its genomic structure. CYP2D6 transcripts were expressed predominantly in the liver and to a much lesser in the testis, suggesting the role of xenobiotic metabolism in the liver.

The ischial region is a common site of pressure sore. The ischial pressure sore with a large subcutaneous bursa is resistant to conservative treatment and tends to require radical surgical treatment. In this article the authors describe their experience with a simple surgical treatment on 8 ischial pressure sores in 7 patients with subcutaneous bursa by means of sclerotherapy using absolute ethanol. This method involves causing the bursa to become scarred and closing it up by sterilizing, fixing, and denaturing by the pharmacologic effect of absolute ethanol instead of surgical excision of the bursa. This alternative method has a possibility of treating pressure sores as well as other fistulous diseases in various areas.

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