Objective: To explore the mRNA expression of MyoD gene in the skeletal muscles of myotonic dystrophy (MD) patients.
Methods: Muscle biopsy specimens were obtained from the biceps muscles of arm of 4 MD patients and 4 healthy controls. Semi-quantitative reverse transcription polymerase chain reaction was performed to evaluate the mRNA expression of MyoD in the specimens.
Results: The mRNA expression index of MyoD of the MD patients was (0.267 +/- 0.114), significantly lower than that of the healthy controls [(0.788 +/- 0.136), P = 0.001].
Conclusion: Down-regulated mRNA expression of MyoD gene is involved in the mechanism of DM.