Models of Antipsychotic Prophylaxis for Schizophrenia

精神分裂症的抗精神病药物预防模型

• 批准号: 6943925
• 负责人: Susan B Powell
• 金额: $ 18.24万
• 依托单位: UNIVERSITY OF CALIFORNIA, SAN DIEGO
• 依托单位国家: 美国
• 财政年份: 2003
• 资助国家: 美国
• 起止时间: 2003-08-08 至 2007-06-30
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/6943925
• 关键词: antipsychotic agents; behavioral /social science research tag; chordate locomotion; developmental psychology; disease /disorder model; hippocampus; laboratory rat; longitudinal animal study; model design /development; nonhuman therapy evaluation; schizophrenia; sensorimotor system

DESCRIPTION (provided by applicant): Clinical evidence suggests that a prolonged period of untreated psychosis may be associated with increased severity of symptoms and decreased overall quality of life. Taken together with the extremely debilitating nature of schizophrenia, there is a renewed interest in the early identification and treatment of psychotic disorders, including prodromal symptoms. While the efficacy, safety, and ethics of early intervention are being examined in the clinical arena, preclinical studies on the therapeutic potential and long-term consequences of prophylactic treatments in animals are warranted in order to inform this debate. Because some forms of schizophrenia appear to be attributable to early developmental perturbations, many animal studies have examined the influences of specific developmental manipulations on behaviors and neural circuitry relevant to schizophrenia. Two developmental rat models, isolation rearing and neonatal ventral hippocampal lesions, result in both sensorimotor gating deficits and locomotor hyperactivity. The use of these two complementary developmental manipulations is important because they differ in their timing and mode of insult, but result in similar behavioral and neuronal abnormalities. These models will allow the examination of the therapeutic potential of prophylactic treatment and the potential side effects of chronic treatment during ontogeny. Isolation rearing is a non-pharmacological, environmental perturbation that deprives the rats of social contact from weaning through adulthood. Neonatal ventral hippocampal lesions involve a discrete, neuroanatomical insult that has temporal and regional specificity. Studies in this application will test whether long-term early administration of antipsychotic medications will prevent the development of isolation rearing or neonatal hippocampal lesion-induced deficits in sensorimotor gating and locomotor habituation. Considering the potential sensitivity of the models to repeated handling, antipsychotic drugs will be administered through the drinking water for an 8 week period initially and then at different time points to determine the critical developmental window of antipsychotic treatment. The specific aims are: 1: To determine the optimal parameters and functional effects of early developmental antipsychotic administration in rats. 2. To assess the effects of prophylactic antipsychotic treatment on isolation rearing induced behavioral deficits. 3. To assess the effects of prophylactic antipsychotic treatment on neonatal ventral hippocampal lesion induced behavioral deficits.

描述（由申请人提供）：临床证据表明，长期未经治疗的精神病可能与症状严重程度增加和整体生活质量下降有关。由于精神分裂症的极度衰弱性，人们对包括前驱症状在内的精神障碍的早期识别和治疗重新产生了兴趣。虽然在临床竞技场中对早期干预的有效性、安全性和伦理学进行了研究，但为了为这一辩论提供信息，有必要对动物预防性治疗的治疗潜力和长期后果进行临床前研究。由于某些形式的精神分裂症似乎可归因于早期发育扰动，许多动物研究已经检查了特定发育操作对精神分裂症相关行为和神经回路的影响。两种发育大鼠模型，隔离饲养和新生儿腹侧海马病变，导致感觉运动门控缺陷和运动功能亢进。使用这两种互补的发育操作是重要的，因为它们在时间和模式的侮辱不同，但导致类似的行为和神经元异常。这些模型将允许检查预防性治疗的治疗潜力和个体发育期间长期治疗的潜在副作用。隔离饲养是一种非药物性的环境干扰，剥夺了大鼠从断奶到成年的社会接触。新生儿腹侧海马损伤涉及离散的神经解剖损伤，具有时间和区域特异性。本申请中的研究将测试长期早期给予抗精神病药物是否会预防隔离饲养或新生儿海马病变诱导的感觉运动门控和运动习惯性缺陷的发展。考虑到模型对重复处理的潜在敏感性，最初将通过饮用水给予抗精神病药物8周，然后在不同时间点给予，以确定抗精神病药物治疗的关键发育窗口。具体目的是：1：确定大鼠早期发育性抗精神病药物给药的最佳参数和功能效应。2.评估预防性抗精神病药物治疗对隔离养育所致行为缺陷的影响。3.探讨抗精神病药物预防性治疗对海马腹侧损伤所致新生儿行为障碍的影响。