We measured the expression level of MYOCD gene encoding myocardin in smooth muscle cells (SMC) derived from aortic wall of the patients with thoracic aortic aneurysm (TAA) associated with either tricuspid- or bicuspid aortic valve (TAV- and BAV- correspondingly) and healthy controls. The gene discussed is MYOCD; the disease is thoracic aortic aneurysm.