为估价心肌显像在 X 综合征诊断中的意义,用^(99m)Tc-甲氧基异丁基异腈对21例有典型心绞痛、冠状动脉造影正常、运动试验心电图阳性而诊断为 X 综合征的患者进行了心肌 SPECT 显像,并与17例临床有胸痛、冠状动脉造影正常、运动试验心电...
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为估价心肌显像在 X 综合征诊断中的意义,用^(99m)Tc-甲氧基异丁基异腈对21例有典型心绞痛、冠状动脉造影正常、运动试验心电图阳性而诊断为 X 综合征的患者进行了心肌 SPECT 显像,并与17例临床有胸痛、冠状动脉造影正常、运动试验心电图阴性的非 X 综合征患者和26例冠状动脉造影证实为冠心病心绞痛患者的心肌显像进行对比。结果:21例 X 综合征患者经心肌 SPECT 检查11例有心肌缺血,其心肌缺血半定量计分为1.1±0.3,而冠心病心绞痛者心肌缺血计分为1.8±0.7(t=3.174 6,P<0.01)。故心肌 SPECT 显像可检出部分 X 综合征的心肌缺血,其缺血程度比冠心病心绞痛者轻。
Objective To assess the feasibility, efficiency and selectivity of adenovirus-mediated gene transfer to local arterial wall by protein-coated metallic *** A replication-defective recombinant adenovirus carrying the L...
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Objective To assess the feasibility, efficiency and selectivity of adenovirus-mediated gene transfer to local arterial wall by protein-coated metallic *** A replication-defective recombinant adenovirus carrying the Lac Z reporter gene for nuclearspecific β-galactosidase (Ad-βgal) was used in this study. The coating for metallic stent was made by immersing it in a gelatin solution containing crosslinker. The coated stents were mounted on a 4.0 or 3.0 mm percutaneous transluminal coronary angioplasty (PTCA) balloon and submersed into a high-titer Ad-βgal viral stock (2 × 1010 pfu/ml) for 3 min, and then implanted into the carotid artedes in 4 mini-swines and into the left anterior descending branch of the coronary artery in 2 mini-swines via 8F large lumen guiding catheters. The animals were sacrificed 7 (n=4), 14 (n = 1) and 21 (n = 1 ) days after implantation, respectively. The β-galactosidase expression was assessed by X-gal *** The results showed that the expression of transgene was detected in all animal. In 1 of carotid artery with an intact intima, the β-gal expression was limited to endothelial cells. In vessels with denuded endothelium, gene expression was found in the sub-intima, media and adventitia. The transfection efficiency of medial smooth muscle cells was 38.6%. In 2 animals sacrificed 7 days after transfection, a microscopic examination of X-gal-stained samples did not show evidence of transfection in remote organs and arterial segments adjacent to the treated arterial *** Adenovirus-mediated arterial gene transfer to endothelial, smooth muscle cells and adventitia by protein-coated metallic stent is feasible. The transfection efficiency is higher. The coated stent may act as a good carrier of adenovirus-mediated gene transfer and have a potential to prevent restenosis following PTCA.
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