Abstract Objectives To investigate the relationship between the β-fibrinogen gene -455A/G polymorphism and plasma fibrinogen level and to determine the influence of the mutation on ischemic stroke. Methods Ninety-o...
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Abstract Objectives To investigate the relationship between the β-fibrinogen gene -455A/G polymorphism and plasma fibrinogen level and to determine the influence of the mutation on ischemic stroke. Methods Ninety-one patients (63.5±10.1 years) with ischemic stroke and 74 elderly control subjects (60.6±10.8 years) without any thromboembolic events and 98 healthy blood donators as young control (37.5±13.3 years) were enrolled in this trial. The β-fibrinogen gene -455A/G polymorphism was analyzed for all subjects by PCR-RFLP with the restrictive enzyme Hae Ⅲ, while plasma fibrinogen levels were obtained from the prothrombin time (PT) assay. For statistical analysis, the parameters were compared between any two different groups by the unpaired Student’s t test and the Chi-square test. Before analysis, log transformations for concentrations of fibrinogen were carried *** H2 allele frequency was higher in male ischemic stroke patients than in the elderly control (22.7% vs 7.1%, χ 2=5.56, P<0.02). There was no significant difference between the female groups. In those patients without any thromboembolic events (both elderly and young control groups), the frequency of H2 decreased with age (≤40, 21.3%; 41-59, 15.4%; and ≥60, 10.2%). In the male elderly and young control groups, the level of plasma fibrinogen was lower in the H1H1 genotype (287±96*!mg/dl and 234±58*!mg/dl) than in H1H2 and H2H2 (331±44*!mg/dl and 307±55*!mg/dl; t=2.53 and 9.67, P<0.05). In the female elderly groups, this tendency was not *** Plasma fibrinogen expression is affected by the β-fibrinogen gene -455A/G polymorphism, and the H2 allele may be a risk factor for ischemic stroke in Chinese males.
目的观察两种不同的正电子发射型计算机断层扫描(PET)显像对常规检查无法明确的肝脏占位的诊断价值。方法在489例临床诊断为肝脏占位的患者中,收集经各种常规检查无法定性,且有条件行两次 PET 检查的患者15例。所有患者均在手术前接受^(...
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目的观察两种不同的正电子发射型计算机断层扫描(PET)显像对常规检查无法明确的肝脏占位的诊断价值。方法在489例临床诊断为肝脏占位的患者中,收集经各种常规检查无法定性,且有条件行两次 PET 检查的患者15例。所有患者均在手术前接受^(11)C-乙酸盐-PET 和^(18)F-去氧葡萄糖(FDG)-PET 检查。结果病理证实恶性病变13例,良性病变2例。在13例恶性病变中,^(11)C-乙酸盐 PET 提示恶性10例,良性3例;^(18)F-FDG-PET 提示恶性9例,良性4例;在2例良性病变中,^(11)C-乙酸盐 PET 提示恶性和良性各1例;^(18)F-FDG-PET 提示恶性和良性也各1例。对于高中分化肝细胞肝癌,^(11)C-乙酸盐 PET 所显示的敏感性(100%)高于^(18)F-FDG-PET 的敏感性(20%);对于低中分化的肝细胞肝癌,^(18)F-FDG 的敏感性高。结论在常规检查不能明确肝占位性质时,有条件的情况下应用两种 PET 示踪剂能提高相关的诊断率,两种示踪剂联合应用还可提示肿瘤的分化程度,对于手术方式的选择有一定的指导意义。
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