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多发性硬化症疾病异质性的MRI标志
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作者 Bielekova B. Kadom N. +1 位作者 Fisher E. 方伯言 《世界核心医学期刊文摘(神经病学分册)》 2006年第3期29-30,共2页
Background: Whereas recent data from imaging studies challenge the prevailing notion that multiple sclerosis (MS) is purely an inflammatory disease, pathologic studies suggest differences in the disease processes betw... Background: Whereas recent data from imaging studies challenge the prevailing notion that multiple sclerosis (MS) is purely an inflammatory disease, pathologic studies suggest differences in the disease processes between individual patients with MS. The ability to dissect the pathophysiologic disease heterogeneity, if it indeed exists, by methodologies that can be applied in vivo is important both for the development of new therapeutics and for the ability to identify the optimal therapy for an individual patient. Objective: To design a stratification algorithm for patients with MS based on accepted MRI measurements reflective of inflammation and axonal damage/tissue loss and to assess if such MS subgroups retain their intergroup differences long term. Methods: Mathematical modeling was used to select three discriminatory MRI measures for clinical outcome based on the cross-sectional analysis of 71 patients with untreated MS and tested general applicability of the stratification scheme on the independent longitudinal cohort of 71 MS patients. Results: By consecutive employment of MRI measures reflect ive of inflammation and tissue loss, the authors were able to separate MS patients into four clinically meaningful subgroups. The analysis of the longitudinal confirmatory cohort demonstrated persistence of the intergroup differences in sel ected MRI measures for 8 years. Conclusions: The inflammatory activity and destr uctiveness of the multiple sclerosis process are to some degree independent of each other, and the successive evaluation of both of these variables can strengthen prediction of clinical outcome in individual patients. 展开更多
关键词 多发性硬化症 MRI 异质性 影像学研究 炎症活动 病理生理 病理学研究 亚组 个体差异 分层设计
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干扰素β-1b对多发性硬化症患者黑洞的影响:每月评估1次为期6年的试验结果
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作者 Bagnato F Gupta S. +1 位作者 Richert N.D. 樊慧婷 《世界核心医学期刊文摘(神经病学分册)》 2006年第3期7-8,共2页
Background: Chronic, hypointense black holes (BHs) are recognized as a sign of permanent damage in patients with multiple sclerosis. Although the effects of interferon beta-1b in reducing the formation of new BHs are ... Background: Chronic, hypointense black holes (BHs) are recognized as a sign of permanent damage in patients with multiple sclerosis. Although the effects of interferon beta-1b in reducing the formation of new BHs are established, it is not clear whether the drug may reduce BH duration after these lesions are formed. Objective: To analyze the effects of interferon beta-1b in reducing the duration of T1 BHs in patients with multiple sclerosis. Design: Patients were clinically assessed and imaged monthly over a 36-month natural history phase and 36-month therapy phase. Numbers of contrast-enhanced lesions and newly formed BHs were counted on each scan. Each BH was counted until it was no longer seen. Setting: Outpatient service of the Neuroimmunology Branch at the National Institutes of Health, Bethesda, Md. Patients: Six patients with relapsing-remitting multiple sclerosis were included. One patient did not form any BHs during the therapy phase. Analyses were performed on the remaining 5 individuals. Interventions: Interferon beta-1b at the dosage of 8 million international units every other day. Main Outcome Measures: Number and duration (in months) of newly formed BHs. Res ults: Rate of BH accumulation decreased with treatment (P=.01), but Kaplan-Meier models revealed that the duration of BHs did not shorten (=2.47, P=.12). Conclusions: Interferon beta-1b reduces the frequency of new BH formation but does not appear to decrease their duration in time. Analyses with larger patient cohorts are needed to confirm these preliminary findings. 展开更多
关键词 多发性硬化症 试验结果 自然病史 永久性损伤 临床评估 持续时间 影像检查 神经免疫学 形成率 斯达
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