These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


PUBMED FOR HANDHELDS

Search MEDLINE/PubMed


  • Title: Cardiac specific troponin-I release in canine experimental myocardial infarction: development of a sensitive enzyme-linked immunoassay.
    Author: Cummins B, Cummins P.
    Journal: J Mol Cell Cardiol; 1987 Oct; 19(10):999-1010. PubMed ID: 3437457.
    Abstract:
    A canine model of experimental myocardial infarction has been used to investigate the release of troponin-I as a specific diagnostic indicator of cardiac necrosis. An enzyme-linked immunoassay was established to detect canine cardiac troponin-I in serum. Polyclonal antisera to cardiac troponin-I showed low cross-reactivity with skeletal muscle troponin-I which was completely removed by immunoadsorption. The cardiac specific ELISA time was 5 to 6 h. Assay sensitivity was 4 ng cardiac troponin-I/ml with an upper limit of 200 ng/ml in neat serum. Mean normal circulating levels of cardiac troponin-I were 15.6 ng/ml compared with an estimated 11 ng/ml in man [Cummins, B. et al. Am Heart J 113, 1333-1344 (1987)]. After experimental infarction, cardiac troponin-I was detectable within 4 to 6 h and peaked between 10 to 16 h post-ligation. Cardiac specific creatine kinase-MB isoenzyme was released with a similar initial time course. Mean peak cardiac troponin-I and CK-MB were elevated 6- and 10-fold respectively. Cardiac troponin-I levels were elevated for up to 200 h post-ligation compared to a maximum of 100 h for CK-MB. The prolonged time course of troponin-I release was comparable to that seen clinically [Cummins, B., et al. Am Heart J 113, 1333-1344 (1987)]. Histochemical infarct size correlated well with CK-MB but less so with troponin-I release. This may reflect the complex nature of intracellular troponin-I degradation and loss from necrotic cardiac tissue.
    [Abstract] [Full Text] [Related] [New Search]