Send to

Choose Destination
See comment in PubMed Commons below
Clin Chim Acta. 1990 Mar 15;187(3):255-64.

Anti-skeletal muscle antibodies in the sera from myasthenic patients with thymoma: identification of anti-myosin, actomyosin, actin, and alpha-actinin antibodies by a solid-phase radioimmunoassay and a western blotting analysis.

Author information

  • 1Department of Clinical Research Center, Utano National Hospital, Kyoto, Japan.


We recently reported a strong association between the occurrence of anti-skeletal muscle (SM) antibodies and the presence of thymoma in patients with myasthenia gravis (MG). To further examine the immunoreactivity of MG sera against human muscle antigens, we developed a solid-phase radioimmunoassay (RIA) using purified muscle antigens and a Western blotting analysis in MG sera with high titers of anti-SM antibodies. Our results showed that MG patients with thymoma (thymoma group) had markedly high titers of anti-myosin and anti-actomyosin antibodies than those without thymoma (non-thymoma group). Furthermore, a close correlation was found between titers of anti-SM, anti-myosin and anti-actomyosin antibodies. The antibody titers against actin, alpha-actinin and tropomyosin were all low and did not correlate with titers of anti-SM antibodies. But, significant levels of these three antibodies were found in the thymoma group. By a Western blotting analysis, immunoreactivity of sera from the thymoma group appeared to be predominantly directed against myosin, actin and alpha-actinin.

[PubMed - indexed for MEDLINE]
PubMed Commons home

PubMed Commons

How to join PubMed Commons

    Supplemental Content

    Loading ...
    Write to the Help Desk