Glycogen and fructose 2,6-bisphosphate levels in rat liver decreased quickly after partial hepatectomy. After 7 days the glycogen level was normalized and fructose 2,6-bisphosphate concentration still remained low. The 'active' (non-phosphorylated) form of 6-phosphofructo-2-kinase varied in parallel with fructose 2,6-bisphosphate levels, whereas the 'total' activity of the enzyme decreased only...

Electrophoretograms of atypical creatine kinase (EC 2.7.3.2, CK) isoenzymes may be difficult to interpret. In addition, their presence may cause discrepancies between results by immunological determinations for mass or activity and those by electrophoresis. Here we outline procedures to use in characterizing apparently atypical CK isoenzymes observed after electrophoresis, as illustrated by a C...

The routine determination of creatine kinase (CK; EC 2.7.3.2) isoenzymes has recently gained acceptance as a diagnostic tool in laboratory medicine (13). Electrophoreticaily three distinct CK isoenzymes can be separated (4, 5). These dimeric bands have been identified throughout the literature as MM, MB, and BB, and originate mainly from skeletal muscle, heart, and brain tissues, respectively. ...

A 72 year old woman presented with a suspected myocardial infarction. An echocardiograph showed no acute changes but her plasma creatine kinase (CK) activity was increased at 343 U/l (< 175 normal range). The apparent creatine kinase-MB activity by a CK-M subunit immunoinhibition assay was 350 U/l. In view of the discrepancy between the total creatine kinase and CK-MB activity plasma creatine k...

Background and Aim: The aim of this study was to investigate the protective effects of Tanacetum parthenium extract (TPE) on lipid peroxidation and acute heart injury induced by carbon tetrachloride (CCl4) in rats. Materials and Methods: In an experimental study, 30 male Wistar rats were divided into 5 groups (n=6). Two of the groups were normal and damage control groups, other 3 groups were d...

For the exclusion (and diagnosis) of acute myocardial infarction, we studied timed sequential (slope) measurements of creatine kinase and creatine kinase-MB catalytic activity concentration, creatine kinase-MB mass concentration, troponin T and myoglobin, using data from 242 patients consecutively admitted for evaluation of suspected acute myocardial infarction in the 12 hours before admission....

The purpose of this study was to evaluate immunoassay methods for the measurement of serum cardiac creatine kinase isoenzyme (CK-MB) with respect to sensitivity and specificity. The CK-MB electrophoretic assay (Helena Laboratories) was used as the reference. Two principles of immunoassay were included in the evaluation,--immunoinhibition and solid phase separation. The direct immunoinhibition t...