Effect of creatine kinase-MM subtype composition on a CK-MB immunoinhibition assay.

Effect of creatine kinase-MM subtype composition on a CK-MB immunoinhibition assay.

Immunoinhibition (INH) by use of polyclonal anti-human CK-M antibody may be used to measure CK-MB in serum. Previous studies have shown that inhibiting antibodies prepared against purified muscle extracts may inhibit CK-MM by greater than 99%. Using patients' sera and muscle homogenates incubated with human serum, we studied the effect of CK-MM subtype composition on an INH assay. We found that...

Clinical evaluation of an immunoinhibition procedure for creatine kinase-MB.

We have clinically evaluated the Dade "Cardiozyme" immunoinhibition procedure for determination of creatine kinase isoenzyme MB (CK-MG) in 71 patients who were suspected of having had an acute myocardial infarction. Electrophoresis for CK-MB was also carried out. On the basis of diagnostic sensitivity and specificity for myocardial infarction, we found the Dade procedure for CK-MB to be somewha...

Macro-creatine kinase co-migrating with CK-MB on electrophoresis.

Certain types ofmacro-CK, type 1, have been reported to cause false increases in CK-MB by co-migration on electrophoresis (1-3). I report two such cases in which the macroCK was an IgA with anti-CK-BB specificity. According to methods proposed by Medeiros et al. (1), immunoprecipitation and subsequent analysis by elecrophoresis was used to separate interfering macre-CK from CK-MB. CK electropho...

Standardization of creatine kinase-MB (CK-MB) mass assays: the use of recombinant CK-MB as a reference material.

BACKGROUND The AACC assembled a committee to identify and validate a standard creatine kinase MB isoenzyme (CK-MB) material to improve the comparability of CK-MB mass assays. METHODS Three protocols were used. In protocol I, various CK-MB materials prepared in different matrices were screened as candidate standards. In protocol II, participating manufacturers calibrated their systems with con...

Direct reaction-rate determination of creatine kinase isoenzyme MB with a centrifugal analyzer, based on immunoinhibition.