Diagnosis of t(2;5)(p23;q35)-associated Ki-1 lymphoma with immunohistochemistry

M. Shiota, J. Fujimoto, M. Takenaga, H. Satoh, R. Ichinohasama, M. Abe, M. Nakano, T. Yamamoto, S. Mori

Research output: Contribution to journalArticlepeer-review

159 Citations (Scopus)


Some Ki-1 lymphomas carry a specific chromosomal translocation, t(2;5)(p23;q35). We have recently found a novel hyperphosphorylated 80-kD protein tyrosine kinase, p80, in a human Ki-1 lymphoma with this translocation. Subsequent cDNA cloning showed that p80 is a fusion protein of two different genes on chromosome 2p23 and 5q35, the novel tyrosine kinase gene and nucleophosmin gene, respectively. In this study, we intended to detect p80 on lymphoma tissues with immunologic methods. Thus, we developed rabbit polyclonal antibody using a synthetic peptide corresponding to a part of its kinase domain. The antibody (anti-p80) immunoprecipitated and immunoblotted p80 specifically from AMS3. Then, to examine whether t(2;5)(p23;q35) was present on biopsied lymphomas, reverse transcriptase- polymerase chain reaction (RT-PCR) covering the fusion junction of p80 mRNA was performed. Among 10 Ki-1 lymphomas and 10 additional lymphomas other than the Ki-1 lymphomas, expression of p80 mRNA was detected in three cases exclusively. When these 20 cases and additional 30 lymphomas were immunostained with anti-p80, positive staining was noted exclusively in the three cases found by PCR to have harbored the p80 mRNA. Thus, the present immunostaining, as well as PCR, was shown to be efficient for detecting lymphomas producing this chimeric protein/mRNA.

Original languageEnglish
Pages (from-to)3648-3652
Number of pages5
Issue number11
Publication statusPublished - 1994
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology


Dive into the research topics of 'Diagnosis of t(2;5)(p23;q35)-associated Ki-1 lymphoma with immunohistochemistry'. Together they form a unique fingerprint.

Cite this