Inflammation-Induced Central Nervous System (CNS) Glutamate as a Function of Depression in Middle Age
试验速览
- 阶段
- 不适用
- 状态
- 已完成
- 入组人数
- 169
- 试验地点
- 3
- 主要终点
- Levels of Glutamate in the basal ganglia
研究概览
简要总结
The purpose of this study is to determine the impact of inflammation on central nervous system (CNS) glutamate, white matter pathology and alterations in behavior and cognition in middle-aged patients with major depression. Depression is associated with significant alterations in glutamate concentrations and white matter integrity, which has been associated with decreased antidepressant response, poor functional outcome, and cognitive impairment.
详细描述
This study involves behavioral assessments, neurocognitive testing, blood sampling and magnetic resonance imaging (MRI) scanning. Goals of this study are to determine the impact of inflammation on glutamate concentrations in the basal ganglia and on the integrity of white matter tracts in the basal ganglia and other subcortical regions of middle-aged depressed versus non-depressed individuals and to associated the impact of glutamate and white matter changes on behavioral symptoms among the same group of patients.
研究设计
- 研究类型
- Observational
- 观察模型
- Case Control
- 时间视角
- Cross Sectional
入排标准
- 年龄范围
- 35 Years 至 65 Years（Adult, Older Adult）
- 性别
- All
- 接受健康志愿者
- 是
入选标准
- 未提供
排除标准
- •Unstable cardiovascular, endocrinologic, hematologic, hepatic, renal, or neurologic disease as evidenced by any of the following:
- •Clinically significant abnormalities in lab values, medical history and physical exam as determined by PI or their designee
- •Changes in medications prescribed for chronic medical illnesses within past 4 weeks,
- •Hospitalization or drastic medical changes within past 4 weeks
- •Cognitive impairment as defined by:
- •Score of < 28 on Mini-mental exam (MMSE)
- •Below 8th grade reading ability as defined by Wide Range Achievement Test-3 (WRAT3) score
- •Presence of psychosis (lifetime) / mania (current) as defined by:
- •Lifetime diagnosis of psychotic disorders SCID-V
- •SCID-V criteria for current mania/hypomania within the current episode
- •Clinically significant substance abuse within the past 6 months as defined by meeting the SCID-V threshold of severity for > 4/11 criteria for substance abuse disorder
- •Presence of active symptoms of an eating disorder as defined by:
- •SCID-V diagnosis of Anorexia or bulimia nervosa.
- •Binge eating and/or purging behavior in the absence of mood alterations or precipitating stress (bingeing within the current episode of mood symptoms will not be exclusionary)
- •Presence of significant psychiatric comorbidities during current episode:
- •Primary diagnosis of anxiety-spectrum disorders (panic, generalized anxiety, social phobia etc.), PTSD, OCD based on SCID-V criteria
- •Severity of above diagnoses exceeds that of major depression based on assessments by the PI and the Study Team members
- •Severe Axis II personality pathology as determined by a clinician
- •Use of immune-active medications:
- •Continuous use of prescribed, standard dose non-steroidal anti-inflammatory (NSAIDs) excluding 81 mg of aspirin within past 1 week and PRN use of NSAIDs within past 72 hours
- •Intake of antibiotics within the past 2 weeks
- •Immunization (including seasonal flu) within the past 2 weeks
- •Use of topical or inhaled steroids within 72 hours unless otherwise approved by PI
- •Use of systemic steroids (oral or parenteral) within past 6 months
- •Patients taking herbal supplements with currently known effects on immune system including omega-3 supplements within 2 weeks or probiotics prior to research blood draws and scan unless approved by PI.
- •Use of psychotropics:
- •Daily intake of standard doses of antidepressants, mood stabilizers, antipsychotics, psychostimulants within 2 weeks (8 weeks for fluoxetine) prior to initiation of study procedures (scan and research blood sampling)
- •Daily/clinically significant use of sedative-hypnotics and tranquilizers and opiates as determined by PI
- •PRN use of sedative/hypnotics, benzodiazepines exceeding equivalent of clonazepam 1mg within 48 hours of study visit.
- •Cancer and autoimmunity:
- •Life time history of diagnosis and/or treatment of cancers other than basal cell carcinoma
- •Life time history of diagnosis and/or treatment of autoimmune disorders including but not restricted to multiple sclerosis, inflammatory bowel disease, systemic lupus erythematosus, rheumatoid arthritis, and Hashimoto's thyroiditis
结局指标
主要结局
Levels of Glutamate in the basal ganglia
时间窗: Day 1 (Day after Screening)
Single-voxel MRS (Magnetic Resonance Spectroscopy) scans will be done to determine the glutamate levels in the basal ganglia. MRS uses a magnetic field to look at magnetic nuclei which absorb and re-emit electromagnetic energy in the presence of the magnetic field. By looking at the peaks in the resultant spectra, the structure and concentrations of metabolite can be determined.
次要结局
- Neurocognitive Testing(Day 1 (Day after Screening))
- Hamilton Rating Scale for Depression (HAM-D-17) Score(Day 1 (Day after Screening))
- Disease affecting white matter connecting frontal cortex to other regions of the brain(Day 1 (Day after Screening))
研究者
Ebrahim Haroon
Associate Professor
Emory University