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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Different time courses of cardiac contractile proteins after acute myocardial infarction.

For the first time we have compared time courses of cardiac myosin light chain-1 (MLC-1), beta-type myosin heavy chain (MHC), troponin T (TnT), myoglobin, creatine kinase (CK) and CKMB in the same patients with acute myocardial infarction (AMI). Blood samples were serially collected in 23 patients with first-time AMI. All but 3 patients received intravenous thrombolytic treatment. TnT and MLC-1 time courses were biphasic in most patients and showed two distinct peaks in 13 and 8 patients, respectively. MHC time courses were usually monophasic. Only 1 patient showed a biphasic MHC time course with two distinct peak values. Although MHC and MLC were lower by about the fourth day after onset of AMI in early reperfused patients, reperfusion did not qualitatively alter MLC and MHC release (no significant influence on the first appearance in blood or on time to peak). MLC and MHC peaks correlated closely (r = 0.75, P = 0.0001), whereas TnT peaks were correlated less closely with MLC or MHC peaks (r = 0.58 each, P < 0.007). Peak values of all cardiac contractile proteins correlated closely and significantly with CKMB peaks (0.75 < or = r < or = 0.81, P < or = 0.0006). Myoglobin was the first marker to increase in blood after AMI and showed the earliest peaks, whereas MHC increased latest showing the latest peaks. TnT increased significantly (P = 0.0001) earlier than MLC and MHC. These results can be explained by the impact of the intracellular compartmentation of a cardiac protein on the rapidity with which it is released after AMI.[1]

References

  1. Different time courses of cardiac contractile proteins after acute myocardial infarction. Mair, J., Wagner, I., Jakob, G., Lechleitner, P., Dienstl, F., Puschendorf, B., Michel, G. Clin. Chim. Acta (1994) [Pubmed]
 
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