Magnetic Resonance Spectroscopy and Genetic Analysis of Oxidative Stress in OEF/OIF Veterans with PTSD and TBI

创伤后应激障碍（PTSD）和轻度创伤性脑损伤（mTBI）是常见的，往往致残 影响许多伊拉克自由行动（OIF），持久自由（OEF）和新的退伍军人的条件 黎明（OND）。新出现的证据表明，这两种疾病都与中枢神经系统水平升高有关 以及外周氧化应激（OXS）和炎症（INF）。为此，我们组织了一个独特的 一组具有分子遗传学和磁共振波谱（MRS）专业知识的研究人员， 研究这些过程与慢性创伤后应激障碍和mTBI的关系。这项研究将从一个庞大的， 法语国家组织/持久自由行动/国家国防部退伍军人的精神病异质性队列，现在平均部署10年后， 与来自先前评估的全基因组基因型数据。我们将获得新的MRS扫描， 结合基因组数据进行分析，以检查PTSD和mTBI与神经和 OXS和INF的外周指数，并确定这些协会的个体差异的基因组来源。 更具体地说，主要目的是（a）检查当前PTSD，mTBI病史， （B）询问OXS和INF途径中的基因，以鉴定遗传性的 PTSD、mTBI和MRS参数之间的关联的调节者，以及（c）检查关联 OXS和INF的MRS测量值、神经完整性的其他MRI指标和OXS的外周标志物之间的关系 这项研究的最终目标是确定未来可以使用的神经生物学通路， 指导制定用于临床评估的血液检查和/或神经成像方案，以及 分子靶点药物干预的退伍军人患有慢性创伤后应激障碍和mTBI。

Posttraumatic stress disorder (PTSD) and mild traumatic brain injury (mTBI) are common and often disabling conditions affecting many veterans of Operations Iraqi Freedom (OIF), Enduring Freedom (OEF), and New Dawn (OND). Emerging evidence suggests that both conditions are associated with elevated levels of central and peripheral oxidative stress (OXS) and inflammation (INF). For this proposal, we have assembled a unique team of investigators with expertise in molecular genetics and magnetic resonance spectroscopy (MRS) to study these processes in relation to chronic PTSD and mTBI. The study will draw from a large and psychiatrically heterogeneous cohort of veterans of OIF/OEF/OND, now on average 10 years post-deployment, with genome-wide genotype data available from a previous assessment. We will acquire new MRS scans for analysis in combination with the genomic data to examine associations of PTSD and mTBI with neural and peripheral indices of OXS and INF and identify genomic sources of individual differences in these associations. More specifically, the primary aims are to (a) examine associations between current PTSD, history of mTBI, and MRS measures of OXS and INF, (b) interrogate genes in the OXS and INF pathways to identify genetic moderators of the associations between PTSD, mTBI and MRS parameters, and (c) examine associations between MRS measures of OXS and INF, other MRI indices of neural integrity, and peripheral markers of OXS and INF. The ultimate goal of this study is to identify neurobiological pathways that can be used in the future to guide the development of blood panels and/or neuroimaging protocols for clinical assessment, as well as molecular targets for pharmacologic intervention for veterans suffering from chronic PTSD and mTBI.