Grabb Margaret C, Cross Alan J, Potter William Z, McCracken James T
From the *National Institute of Mental Health, NIH, Rockville, MD; †AstraZeneca Neuroscience Innovative Medicines Unit, Cambridge, MA; and ‡UCLA Semel Institute for Neurosciences, Los Angeles, CA.
J Clin Psychopharmacol. 2016 Oct;36(5):419-21. doi: 10.1097/JCP.0000000000000536.
The lack of success of psychiatric drug research and development has increased attention on the use of precompetitive models of early stage clinical drug development, whereby foundations, companies and academic researchers led by NIH, work together to advance a pipeline of potential novel therapeutics. This commentary presents an example of such an approach through which the National Institute of Mental Health contracted a network of academic researchers to work with other stakeholders to investigate AZD7325, a drug targeting the GABA-A α2/α3 receptor subtype, in young adult subjects with autism spectrum disorder using an experimental medicine approach. Instead of relying on traditional clinical measures, electroencephalography was used to evaluate pharmacodynamic responses and was established as the primary outcome measure, in order to objectively identify dose ranges that can modulate central nervous system activity in the absence of significant side effects. Many trial considerations and “lessons learned” were identified through the process of setting up and performing the trial. These considerations are important to present to the research community more broadly, to emphasize what processes and resources are needed to integrate pharmacodynamics measures into multisite trials in research areas which have traditionally relied on clinical rating scales alone. The goal is to design and implement studies that will provide sufficient objective data of brain effects to make go/no-go decisions to clinical efficacy studies in which one is confident that the underlying mechanistic hypothesis of drug action is being tested. We here provide a real life example of what is required to execute this strategy.
精神科药物研发的不成功使得人们更加关注临床药物早期研发的竞争前模式,即由美国国立卫生研究院(NIH)牵头,基金会、公司和学术研究人员共同合作,推进一系列潜在新型疗法的研发进程。本评论通过一个例子展示了这种方法,即美国国立精神卫生研究所与一个学术研究人员网络签约,让他们与其他利益相关者合作,采用实验医学方法,在患有自闭症谱系障碍的年轻成人受试者中研究一种靶向GABA-A α2/α3受体亚型的药物AZD7325。该研究没有依赖传统的临床测量方法,而是使用脑电图来评估药效学反应,并将其确立为主要结局指标,以便在没有明显副作用的情况下客观地确定能够调节中枢神经系统活动的剂量范围。在设置和进行试验的过程中,确定了许多试验考量因素和“经验教训”。更广泛地向研究界介绍这些考量因素很重要,以强调在传统上仅依赖临床评分量表的研究领域,将药效学测量纳入多中心试验需要哪些流程和资源。目标是设计和实施能够提供足够大脑效应客观数据的研究,以便就临床疗效研究做出继续/终止决策,即确信正在检验药物作用的潜在机制假设。我们在此提供一个实施该策略所需条件的实际例子。