Serological identification of HSP105 as a novel non-Hodgkin lymphoma therapeutic target.

Claudio Tripodo, Carmelo Carlo-Stella, Roberta Zappasodi, Massimo Di Nicola, Alessandro M. Gianni, Gaia C. Ghedini, Lorenzo Castagnoli, Claudio Tripodo, Antonello D. Cabras, Monica Tortoreto, Serenella M. Pupa, Italia Bongarzone, Michele Magni, Antonella Messina

Research output: Contribution to journalArticlepeer-review

22 Citations (Scopus)

Abstract

We reported that the clinical efficacy of dendritic cell-based vaccination is strongly associated with immunologic responses in relapsed B-cell non-Hodgkin lymphoma (B-NHL) patients. We have now investigated whether postvaccination antibodies from responders recognize novel shared NHL-restricted antigens. Immunohistochemistry and flow cytometry showed that they cross-react with allogeneic B-NHLs at significantly higher levels than their matched prevaccination samples or nonresponders' antibodies. Western blot analysis of DOHH-2 lymphoma proteome revealed a sharp band migrating at approximately 100 to 110 kDa only with postvaccine repertoires from responders. Mass spectrometry identified heat shock protein-105 (HSP105) in that molecular weight interval. Flow cytometry and immunohistochemistry disclosed HSP105 on the cell membrane and in the cytoplasm of B-NHL cell lines and 97 diagnostic specimens. A direct correlation between HSP105 expression and lymphoma aggressiveness was also apparent. Treatment of aggressive human B-NHL cell lines with an anti-HSP105 antibody had no direct effects on cell cycle or apoptosis but significantly reduced the tumor burden in xenotransplanted immunodeficient mice. In vivo antilymphoma activity of HSP105 engagement was associated with a significant local increase of Granzyme B(+) killer cells that very likely contributed to the tumor-restricted necrosis. Our study adds HSP105 to the list of nononcogenes that can be exploited as antilymphoma targets.
Original languageEnglish
Pages (from-to)4421-4430
Number of pages10
JournalBlood
Volume118
Publication statusPublished - 2011

All Science Journal Classification (ASJC) codes

  • Biochemistry
  • Immunology
  • Hematology
  • Cell Biology

Fingerprint

Dive into the research topics of 'Serological identification of HSP105 as a novel non-Hodgkin lymphoma therapeutic target.'. Together they form a unique fingerprint.

Cite this