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A Pilot Randomized, Placebo-Controlled Trial of Glycine for Treatment of Schizophrenia and Alcohol Dependence
Journal of Dual Diagnosis ( IF 2.324 ) Pub Date : 2019-01-02 , DOI: 10.1080/15504263.2018.1549764
Jane Serrita 1 , Elizabeth Ralevski 1 , Gihyun Yoon 1 , Ismene Petrakis 1
Affiliation  

Abstract Objectives: The hypofunctioning of N-methyl-D-aspartate (NMDA) receptors are thought to play an important role in the pathophysiology of schizophrenia. The augmentation of the glutamatergic system through the NMDA receptor may attenuate alcohol craving and use. This study was designed to evaluate the efficacy of glycine, an agonist of the glycine B co-agonist site of the NMDA receptor on alcohol consumption and cravings as well as on negative symptoms in schizophrenia. Methods: Participants (N = 20) were given 0.8 g/kg glycine or matching placebo (provided in bottles with mixed in solution) each week for the duration of the 12-week trial. Primary outcome measures included drinking, craving for alcohol, and symptoms of schizophrenia. Cognitive functioning (attention, concentration, and memory) was also evaluated. Results: Glycine showed no benefit over placebo in the reduction of heavy drinking days or craving for alcohol over a 12-week treatment period. Nor was there an effect on negative symptoms of schizophrenia or on cognitive functioning. Conclusions: Although our study showed no beneficial effect of glycine over placebo, our results are consistent with the largest trial of glycine treatment in schizophrenia. Diagnosed schizophrenia and alcohol dependence might be more difficult to treat because of more severe psychopathology. This is the first study to date to examine an innovative treatment approach with an amino acid, glycine, as potentially acting on both alcohol intake and negative symptoms of schizophrenia.

中文翻译:

甘氨酸治疗精神分裂症和酒精依赖的随机、安慰剂对照试验

摘要 目的:N-甲基-D-天冬氨酸(NMDA)受体的功能减退被认为在精神分裂症的病理生理学中起重要作用。通过 NMDA 受体增强谷氨酸能系统可能会减弱对酒精的渴望和使用。本研究旨在评估甘氨酸(NMDA 受体的甘氨酸 B 共激动剂位点的激动剂)对酒精消耗和渴望以及精神分裂症阴性症状的功效。方法:在为期 12 周的试验期间,参与者(N = 20)每周被给予 0.8 g/kg 甘氨酸或匹配的安慰剂(以混合溶液的瓶装提供)。主要结局指标包括饮酒、嗜酒和精神分裂症症状。还评估了认知功能(注意力、注意力和记忆力)。结果:在 12 周的治疗期内,甘氨酸在减少大量饮酒天数或对酒精的渴望方面没有显示出优于安慰剂的益处。对精神分裂症的阴性症状或认知功能也没有影响。结论:虽然我们的研究显示甘氨酸没有优于安慰剂的有益作用,但我们的结果与最大的甘氨酸治疗精神分裂症试验一致。由于更严重的精神病理学,诊断出的精神分裂症和酒精依赖可能更难治疗。这是迄今为止第一项研究使用氨基酸甘氨酸的创新治疗方法,因为它可能对酒精摄入和精神分裂症的阴性症状起作用。对精神分裂症的阴性症状或认知功能也没有影响。结论:虽然我们的研究显示甘氨酸没有优于安慰剂的有益作用,但我们的结果与最大的甘氨酸治疗精神分裂症试验一致。由于更严重的精神病理学,诊断出的精神分裂症和酒精依赖可能更难治疗。这是迄今为止第一项研究使用氨基酸甘氨酸的创新治疗方法,因为它可能对酒精摄入和精神分裂症的阴性症状起作用。对精神分裂症的阴性症状或认知功能也没有影响。结论:虽然我们的研究显示甘氨酸没有优于安慰剂的有益作用,但我们的结果与最大的甘氨酸治疗精神分裂症试验一致。由于更严重的精神病理学,诊断出的精神分裂症和酒精依赖可能更难治疗。这是迄今为止第一项研究使用氨基酸甘氨酸的创新治疗方法,因为它可能对酒精摄入和精神分裂症的阴性症状起作用。由于更严重的精神病理学,诊断出的精神分裂症和酒精依赖可能更难治疗。这是迄今为止第一项研究使用氨基酸甘氨酸的创新治疗方法,因为它可能对酒精摄入和精神分裂症的阴性症状起作用。由于更严重的精神病理学,诊断出的精神分裂症和酒精依赖可能更难治疗。这是迄今为止第一项研究使用氨基酸甘氨酸的创新治疗方法,因为它可能对酒精摄入和精神分裂症的阴性症状起作用。
更新日期:2019-01-02
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