Autoantibody response against a novel testicular antigen protein highly expressed in testis (PHET) in SSc patients

Hidekata Yasuoka, Masataka Kuwana

Research output: Contribution to journalReview article

7 Citations (Scopus)

Abstract

Systemic sclerosis (SSc) is characterized by excessive fibrosis and autoantibody production. However, the pathogenesis of SSc is still under investigation. We have demonstrated that a novel testicular antigen, protein highly expressed in testis (PHET), is overexpressed in SSc dermal fibroblasts and targeted by autoantibodies. PHET was identified by screening of HepG2 cDNA library using an SSc serum and was found to belong to UniGene cluster of sperm associated antigen 9 (SPAG9) from its nucleotide sequence. PHET mRNA expression was examined by RT-PCR using mRNA panels of human tissues, and PHET mRNA was highly expressed only in testis in normal tissues. Anti-PHET antibodies were detected in 8.4% of sera of SSc patients by immunoblotting, and associated with diffuse scleroderma and lung involvement. Expression of PHET mRNA and protein was increased in cultured SSc dermal fibroblasts compared with control fibroblasts. These results suggest that ectopic expression of PHET in dermal fibroblasts induces autoantibody production against PHET in patients with SSc.

Original languageEnglish
Pages (from-to)228-231
Number of pages4
JournalAutoimmunity Reviews
Volume6
Issue number4
DOIs
Publication statusPublished - 01-03-2007
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Immunology and Allergy
  • Immunology

Fingerprint Dive into the research topics of 'Autoantibody response against a novel testicular antigen protein highly expressed in testis (PHET) in SSc patients'. Together they form a unique fingerprint.

  • Cite this