Changes in mRNA levels of cardiac and skeletal muscle specific transcription factors within ventricular myocardium and skeletal muscle.

<p>Data are expressed as average ± SD. Cardiac transcription factors, Nkx2.5 and GATA4, and skeletal muscle transcription factor MyoD expression did not change in ventricular myocardium in adulthood, whereas myogenin expression was significantly decreased in ventricular myocardium (<i>P</i><0.05, ANOVA). Nkx2.5 and GATA4 were significantly decreased during development, and MyoD and myogenin were significantly increased in skeletal muscle during the development (<i>P</i><0.05). Log₁₀RQ: Relative Quantification of mRNA level compared to the mRNA level in ED13. The ratio is expressed as logarithm with base value of 10 (Log₁₀).