bcl-2 and MIB-1 labeling indexes in cats with lymphoma

Gillian Dank, Michael D. Lucroy, Stephen M Griffey, Regina F Gandour-Edwards, Bruce R. Madewell

Research output: Contribution to journalArticle

16 Scopus citations

Abstract

Immunohistochemistry was used to examine feline lymphoid tumors for bcl-2 and MIB-1 expression. Tumor tissues from 29 cats were selected to represent 2 groups - cats that did not respond to chemotherapy and cats that responded to therapy. Median bcl-2 immunoreactivity was 60%, and median MIB-1 reactivity was 47%. There was no significant difference in median survival time between cats with tumors with high levels of bcl-2 expression and those with low levels of expression. There was no significant difference in median survival time between cats with tumors with high levels of MIB-1 expression and those with low levels of expression. Mean bcl-2 immunoreactivity was significantly (P = .0004) higher in low-grade (73.2%) than in high-grade (16.9%) lymphomas, whereas the mean MIB-1 immunoreactivity was significantly (P = .0201) higher in high-grade (61.2%) lymphomas than in low-grade (35.0%) lymphomas. The mean bcl-2 immunoreactivity was significantly (P = .0042) greater in T-cell lymphomas (66.8%) than in B-cell lymphomas (22.8%). whereas the mean MIB-1 immunoreactivity was significantly (P = .0052) lower in T-cell lymphomas (36 4%) than in B-cell lymphomas (65.2%). Although expression of bcl-2 and MIB-1 did not appear to be linked to responses to chemotherapy in cats with lymphoma, the data suggest a possible role for these regulatory proteins in the biology of feline lymphomas.

Original languageEnglish (US)
Pages (from-to)720-725
Number of pages6
JournalJournal of Veterinary Internal Medicine
Volume16
Issue number6
StatePublished - Nov 2002

Keywords

  • Apoptosis
  • Cellular proliferation
  • Feline

ASJC Scopus subject areas

  • veterinary(all)

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