Expression of endogenous granzyme B in a subset of human primary breast carcinomas

S. X. Hu, S. Wang, J. P. Wang, G. B. Mills, Y. Zhou, H. J. Xu

Research output: Contribution to journalArticlepeer-review

27 Scopus citations


Granzyme B (GrB) is the prototypic member of a serine protease family primarily used by cytotoxic lymphocytes to kill target cells. We report here that, by immunohistochemical staining of paraffin-embedded tumour sections, GrB protein was unexpectedly detected in malignant cells of a subset of breast cancers and their adjacent reactive endothelial and mesenchymal cells in which endogenous retinoblastoma protein (pRB) is overexpressed. The identity of the endogenous GrB was further confirmed experimentally in RB-deficient breast carcinoma cell culture upon overexpression of ectopic pRB. Our finding extends the recent paradigm-shifting trend for a more diverse biological role of granzyme B, and might provide a rational basis for exploring its potential prognostic value in a variety of human cancers.

Original languageEnglish (US)
Pages (from-to)135-139
Number of pages5
JournalBritish Journal of Cancer
Issue number1
StatePublished - Jul 7 2003
Externally publishedYes


  • Breast cancer
  • Endogenous granzyme B
  • Nonimmune cells
  • Retinoblastoma tumour suppressor gene

ASJC Scopus subject areas

  • Oncology
  • Cancer Research


Dive into the research topics of 'Expression of endogenous granzyme B in a subset of human primary breast carcinomas'. Together they form a unique fingerprint.

Cite this