Identification of HSP-60 as the specific antigen of IgM produced by BRG- lymphoma cells

Luca Musante, Massimo Ulivi, Giovanna Cutrona, Nicholas Chiorazzi, Silvio Roncella, Giovanni Candlano, Manlio Ferrarini

Research output: Contribution to journalArticle

Abstract

In previous studies we described a patient with Burkitt's lymphoma and AIDS, whose cells recognized a molecule expressed by normal and malignant breast cells. In the present study, we identified this antigen by two- dimensional (2-D) electrophoresis and Western blotting using the antibody produced by lymphoma cells. The antigen so identified consisted of two clusters of spots with a molecular mass (M(r)) of 60 and 50 kDa, respectively. Preparative immobilized pH gradient (IPG) was subsequently used to isolate the clusters of spots of higher molecular masses, from which peptide fragments of approximately 10 aa were separated on reverse-phase chromatography and sequenced. This procedure enabled the identification of the antigen recognized by the lymphoma cells as HSP-60. By means of serological analyses it was possible to identify the lower molecular mass cluster of spots as a molecule related to HSP-60. It is hypothesized that this molecule is a membrane form of HSP-60 that differs from HSP60 in a COOH terminal portion.

Original languageEnglish
Pages (from-to)1092-1097
Number of pages6
JournalElectrophoresis
Volume20
Issue number4-5
DOIs
Publication statusPublished - 1999

Keywords

  • Apoptosis
  • Burkitt's lymphoma
  • Heat shock protein
  • Two-dimensional gel electrophoresis

ASJC Scopus subject areas

  • Clinical Biochemistry

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