Association of felis catus papillomaviruses (FcaPVs) with feline
squamous cell carcinoma (SCC) has been reported worldwide, while there is limited
information about FcaPVs in Asia. In this study, 21 feline SCC biopsy samples from cats in
Japan were analyzed by PCR with PV consensus primers and type-specific primers for FcaPV
type 2 (FcaPV-2), FcaPV-3 and FcaPV-4 designed in this study. Sequence analysis revealed
that one sample was FcaPV-3, and two were FcaPV-4. In both FcaPV-4 positive samples, 334th
tryptophan in L1 ORF was deleted compared with the reference sequence. Moreover,
immunohistochemistry showed that p16 protein was positive in both FcaPV-4 detected
samples. This study would contribute to the molecular epidemiological and pathological
understanding of FcaPV in Japan.
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