Induction of assembly of MHC class I heavy chains with beta 2microglobulin by interferon-gamma.

AUTOR(ES)

Klar, D

RESUMO

Assembly of histocompatibility class I heavy chains with beta 2microglobulin (beta 2m) is known to be necessary for cell surface expression. Studies on the H-2 class I deficient but interferon-gamma (IFN-gamma) inducible fibrosarcoma BC2 and the lung carcinoma CMT 64.5 showed that after transfection with allogeneic H-2 class I genes the class I proteins are expressed, but only intracellularly and not on the cell surface. In spite of the presence of beta 2m in the cells no association of the transfected class I chain with beta 2m was observed. However, stimulation with IFN-gamma induced assembly and subsequent surface expression. These findings show that the assembly of class I heavy chains with beta 2m is not a spontaneous event but appears to be regulated by cellular mechanisms the nature of which is still unknown.

Documentos Relacionados

• Unusual association of beta 2-microglobulin with certain class I heavy chains of the murine major histocompatibility complex.
• Sensitization to self (virus) antigen by in situ expression of murine interferon-gamma.
• Decreased expression of human class II antigens on monocytes from patients with acquired immune deficiency syndrome. Increased expression with interferon-gamma.
• Fever and acute phase response induced in rabbits by human recombinant interferon-gamma.
• Autoreactive T lymphocytes in multiple sclerosis determined by antigen-induced secretion of interferon-gamma.