Neuropathy and anti-myelin-associated glycoprotein IgM M proteins: T cell regulation of M protein secretion in vitro Academic Article uri icon


MeSH Major

  • B-Lymphocytes
  • Blood Proteins
  • Immunoglobulin M
  • Immunoglobulins
  • Myelin Proteins
  • Peripheral Nervous System Diseases
  • T-Lymphocytes
  • Waldenstrom Macroglobulinemia


  • In patients with plasma cell dyscrasia, individual clones of antibody-producing cells proliferate abnormally and secrete monoclonal antibodies or M proteins in excess. The cause of the monoclonal proliferation of lymphocytes and M protein secretion is unknown and it is not known whether the M protein-secreting B cells are autonomous or capable of responding to regulatory T cells. We carried out experiments using lymphocytes from a patient with neuropathy and plasma cell dyscrasia whose IgM M protein bound to the myelin-associated glycoprotein (MAG) to determine whether secretion of the M protein in vitro was responsive to T cell help or suppression. M protein secretion was measured by an enzyme-linked immunosorbent assay system for measuring anti-MAG IgM, and the number of M protein-secreting lymphocytes was enumerated by a reverse hemolytic plaque assay specific for the M protein idiotype. The patient's B cells were maximally stimulated by pokeweed mitogen-activated autologous OKT4+ T-helper cells and the helper effect was inhibited by OKT8+ suppressor/cytotoxic T cells. Low levels of M protein secretion in the absence of T cells were also observed and there was partial stimulation of M protein secretion by T cells in the absence of pokeweed mitogen.

publication date

  • October 31, 1985



  • Academic Article



  • eng

Digital Object Identifier (DOI)

  • 10.1002/ana.410180204

PubMed ID

  • 2412486

Additional Document Info

start page

  • 182

end page

  • 8


  • 18


  • 2