ABSTRACT
<p><b>OBJECTIVE</b>To evaluate the CT imaging characteristics of incomplete and complete myocardial bridges-mural coronary artery (MB-MCA).</p><p><b>METHODS</b>Fifty subjects with dual source coronary CT angiography (DSCTA) evidenced MB were included. The subjects were divided into incomplete MB-MCA and complete MB-MCA groups. The diameter of MCA in best systole phase and diastole phase, the MCA stenosis rate, the presence of atheromatous change proximal to the MB were evaluated.</p><p><b>RESULTS</b>There were 58 MB, the average length was (2.02 ± 1.02) cm, 23 were incomplete MB and 35 were complete MB. Thirty-two MB were in the middle segments of left anterior descending artery (55.2%); 17 MB were in the distal segment of the left anterior descending artery (29.3%); 1 MB was in the proximal segment of left anterior descending artery; 3 MB in diagonal branch; 4 MB in obtuse marginal branch, 1 MB in distal right coronary artery. It was statistically significant difference between the incomplete MB-MCA and the complete MB-MCA of the diameter change in diastole and systole phase [(1.93 ± 0.49) mm, (1.71 ± 0.45) mm vs. (2.21 ± 0.41) mm, (1.63 ± 0.52) mm, P = 0.008] and stenosis rate (10.38% ± 20.2% vs. 25.12% ± 21.02%, P = 0.01). Atherosclerotic finding was evidenced in 8 incomplete MB (34.78%) and 15 complete MB (42.86%) at the proximal vessel of mural coronary artery (P > 0.05).</p><p><b>CONCLUSION</b>DSCTA can vividly display the incomplete and complete myocardial MB, accurately evaluate the shape change of MB-MCA in diastole and systole phase and detect the atherosclerotic change in the proximal vessel of MB.</p>
Subject(s)
Adult , Aged , Aged, 80 and over , Female , Humans , Male , Middle Aged , Atherosclerosis , Diagnostic Imaging , Coronary Angiography , Coronary Vessels , Myocardial Bridging , Diagnostic Imaging , Retrospective Studies , Tomography, X-Ray ComputedABSTRACT
Metallothionein-3 (MT-3), renamed as growth inhibitory factor (GIF), is a brain specific member of the metallothionein family. Human dUTPase is a recently found protein in brain that can interact with hMT-3. They have the growth inhibitory activity on neuron cell by interaction. To study the affection of hMT-3 to dUTPase's eliminating the cellular toxicity caused by dUTP, the pSVHA-dUTPase and pFLag-hMT-3 genes have been transfected into HEK293 cells. In addition, the dUTPase and hMT-3 proteins were expressed in BL21 to study the role of hMT-3 on the hydrolyzation of dUTP by dUTPase. The results demonstrate that the cells co-transfected with dUTPase and hMT-3 genes have more strong resistibility to dUTP than the cells transfected only with dUTPase gene. And that the hMT-3 protein can accelerate the hydrolyzation of dUTP by dUTPase. All these indicate that hMT-3 can cooperate with dUTPase to protect better the 293 cells from dUTP. This research offered the theoretic elements for the application of hMT-3 and dUTPase in chemic cure.