DOES CHANGE IN ACETYLCHOLINE RECEPTOR ANTIBODY LEVEL CORRELATE WITH CLINICAL CHANGE IN MYASTHENIA GRAVIS?

作者：Sanders Donald B^*; Burns Ted M; Cutter Gary R; Massey Janice M; Juel Vern C; Hobson Webb Lisa

来源：Muscle & Nerve, 2014, 49(4): 483-486.

DOI：10.1002/mus.23944

• acetylcholine receptor antibody
• clinical trials
• MG Composite
• myasthenia gravis
• outcome measures
• QMG score

Introduction: The objective of this study is to determine if change in acetylcholine receptor antibody (AChR-ab) levels reflects change in clinical severity in patients with myasthenia gravis (MG). Methods: We reviewed results from a prospective trial in MG and from all 85 patients in an MG Clinic who had AChR-ab determinations performed at least twice by the same commercial laboratory. Results: Change in AChR-ab levels correlated only weakly with change in clinical severity. AChR-ab levels fell in 92% of patients who improved and in 63% who did not. A fall in AChR-ab level had a positive predictive value for clinical improvement of 83% and a negative predictive value of only 59%. Conclusions: AChR-ab levels fell in almost all patients who improved, but also in most patients who did not. Thus, we do not recommend commercially available AChR-ab levels as a biomarker of improvement in MG. However, antibody levels might be useful as a marker for inadequate immunotherapy. Muscle Nerve 49:483-486, 2014

• 出版日期2014-4