Secretion of HLA-A and -B antigens via an alternative RNA splicing pathway.

Journal Article (Journal Article)

Human class I major histocompatibility antigens (HLA-A, -B and -C) are integral membrane protein heterodimers, which are anchored in the membrane via a stretch of hydrophobic amino acids near the carboxyl terminus of the heavy chain. It has previously been shown that a mutagenized cell line secretes a water soluble form of the HLA-A2 antigen, due to a pattern of RNA splicing that removes exon 5 (encoding the transmembrane hydrophobic amino acids) from mature, HLA-A2--encoding transcripts. The present study was undertaken to assess whether a similar process might be operative in nonmutagenized cells. It is shown that water soluble class I molecules (primarily HLA-A24) are secreted by the T leukemic cell line HPB-ALL, and that alternative splicing removes exon 5 from a fraction of HLA-A24--encoding transcripts. It is further shown that class I molecules are secreted, possibly in an allele-specific fashion, from a variety of tumor cells and normal cells. The possible relationship between these findings and previous reports of HLA-A and -B antigens in human serum is discussed.

Full Text

Duke Authors

Cited Authors

  • Krangel, MS

Published Date

  • May 1, 1986

Published In

Volume / Issue

  • 163 / 5

Start / End Page

  • 1173 - 1190

PubMed ID

  • 3701253

Pubmed Central ID

  • PMC2188102

International Standard Serial Number (ISSN)

  • 0022-1007

Digital Object Identifier (DOI)

  • 10.1084/jem.163.5.1173


  • eng

Conference Location

  • United States