Zeta chain and CD28 are poorly expressed on T lymphocytes from chronic lymphocytic leukemia

Leukemia. 1996 Mar;10(3):494-7.


We have analyzed the expression of the zeta chain of the T cell receptor/CD3 complex and the co-stimulatory molecule CD28 by dual colour immunofluorescence on T lymphocytes from patients with B cell chronic lymphocytic leukemia (CLL). Zeta chain was significantly reduced on CD3-positive lymphocytes from 33 patients compared with normal controls (P<0.0001). The values were lower in stages B and C than in stage A. In five patients tested in partial remission the values were normal. CD28, investigated in CD3, CD4 and CD8 positive T cells from 18 CLL patients appeared to be reduced in the three subsets but more marked in CD8-positive lymphocytes. The loss of zeta chain and CD28 in a proportion of circulating T lymphocytes from CLL may underlie some of the known functional abnormalities of these cells and the immunodeficiency associated with the disease.

Publication types

  • Research Support, Non-U.S. Gov't

MeSH terms

  • CD28 Antigens / metabolism*
  • Flow Cytometry
  • Humans
  • Leukemia, Lymphocytic, Chronic, B-Cell / immunology*
  • Membrane Proteins / metabolism*
  • Receptor-CD3 Complex, Antigen, T-Cell / metabolism
  • Receptors, Antigen, T-Cell / metabolism*
  • T-Lymphocytes / immunology*


  • CD28 Antigens
  • Membrane Proteins
  • Receptor-CD3 Complex, Antigen, T-Cell
  • Receptors, Antigen, T-Cell
  • antigen T cell receptor, zeta chain