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Troponin T (blue) anchors the complex on tropomyosin. Troponin is found in both skeletal muscle and cardiac muscle, but the specific versions of troponin differ between types of muscle. The main difference is that the TnC subunit of troponin in skeletal muscle has four calcium ion-binding sites, whereas in cardiac muscle there are only three.
Test Sensitivity and specificity Approximate peak Description Troponin test: The most sensitive and specific test for myocardial damage. Because it has increased specificity compared with CK-MB, troponin is composed of 3 proteins- Troponin C, Cardic troponin I, and Cardiac troponin T. Troponin I especially has a high affinity for myocardial injury.
Troponin I is a biomarker that responds to treatment interventions. Reductions in troponin I levels proved to reduce the risk of future CVD. [23] [24] [25] High sensitive troponin I used as a screening tool to assess a person's cardiovascular risk and has the potential to reduce the growing cost burden of the healthcare system. [26]
A diagnosis of myocardial infarction is created by integrating the history of the presenting illness and physical examination with electrocardiogram findings and cardiac markers (blood tests for heart muscle cell damage).
7134 21924 Ensembl ENSG00000114854 ENSMUSG00000091898 UniProt P63316 P19123 RefSeq (mRNA) NM_003280 NM_009393 RefSeq (protein) NP_003271 NP_033419 Location (UCSC) Chr 3: 52.45 – 52.45 Mb Chr 14: 30.93 – 30.93 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Troponin C, also known as TN-C or TnC, is a protein that resides in the troponin complex on actin thin filaments of striated ...
Troponin T binds to tropomyosin and helps position it on actin, [2] and together with the rest of the troponin complex, modulates contraction of striated muscle. [3] The cardiac subtype of troponin T is especially useful in the laboratory diagnosis of heart attack because it is released into the blood-stream when damage to heart muscle occurs. [4]
Cardiac muscle troponin T (cTnT) is a protein that in humans is encoded by the TNNT2 gene. [ 5 ] [ 6 ] Cardiac TnT is the tropomyosin -binding subunit of the troponin complex, which is located on the thin filament of striated muscles and regulates muscle contraction in response to alterations in intracellular calcium ion concentration.
Cardiac troponin T (low sensitive) 0.1 [7] ng/mL: 99th percentile cutoff: Cardiac troponin I (high sensitive) 0.03 [7] ng/mL 99th percentile cutoff: Cardiac troponin T (high sensitive) Male 0.022 [7] ng/mL 99th percentile cutoff: Female 0.014 [7] ng/mL 99th percentile cutoff: newborn/infants not established more than adults [60] [61]