Related Experiment Videos
Novel HY peptide antigens presented by HLA-B27
W A Simmons1, S G Summerfield, D C Roopenian
1Harold C. Simmons Arthritis Research Center and Department of Internal Medicine, University of Texas Southwestern Medical Center, Dallas 75235, USA.
Journal of Immunology (Baltimore, Md. : 1950)
|September 23, 1997
Summary
Researchers identified two male-specific HY minor histocompatibility antigens presented by HLA-B27. These novel peptides, derived from autosomal genes regulated by the Y chromosome, expand the understanding of HY antigen complexity.
Area of Science:
- Immunology
- Genetics
- Mass Spectrometry
Background:
- Male-specific (H-Y) minor histocompatibility antigens (HY Ags) are crucial in transplantation immunology.
- Previous studies identified H-Y Ags encoded by the Y chromosome.
- HLA-B27 presents peptides to cytotoxic T lymphocytes (CTLs).
Purpose of the Study:
- To identify and characterize novel male-specific HY minor histocompatibility antigens presented by HLA-B27.
- To investigate the genetic origin of these HY antigens.
Main Methods:
- Isolation and purification of peptides from male B27 rat spleen cells.
- Analysis using electrospray tandem mass spectrometry (QQ-TOF).
- Synthesis of peptides and assessment of binding to HLA-B27 and recognition by CTLs.
Main Results:
- Two novel peptide sequences, KQYQKSTER and AVLNKSNREVR, were identified.
- These peptides bind HLA-B27 and are recognized by B27-restricted anti-HY CTLs.
- Peptides are homologous to autosomal proteins but controlled by the Y chromosome's Sxr(b) segment.
Conclusions:
- The identified peptides represent novel HY minor histocompatibility antigens.
- These findings suggest Y chromosome regulation of autosomal gene products.
- The study expands the known repertoire of HLA-B27-presented peptides and the complexity of HY antigen genetics.