Comorbidity between post-traumatic stress disorder and major depressive disorder: alternative explanations and treatment considerations. 2015

Janine D Flory, and Rachel Yehuda
James J. Peters Veterans Affairs Medical Center, Bronx, USA; Department of Psychiatry, Icahn School of Medicine at Mount Sinai, New York, USA.

Approximately half of people with post-traumatic stress disorder (PTSD) also suffer from Major Depressive Disorder (MDD). The current paper examines evidence for two explanations of this comorbidity. First, that the comorbidity reflects overlapping symptoms in the two disorders. Second, that the co-occurrence of PTSD and MDD is not an artifact, but represents a trauma-related phenotype, possibly a subtype of PTSD. Support for the latter explanation is inferred from literature that examines risk and biological correlates of PTSD and MDD, including molecular processes. Treatment implications of the comorbidity are considered.

UI MeSH Term Description Entries
D007030 Hypothalamo-Hypophyseal System A collection of NEURONS, tracts of NERVE FIBERS, endocrine tissue, and blood vessels in the HYPOTHALAMUS and the PITUITARY GLAND. This hypothalamo-hypophyseal portal circulation provides the mechanism for hypothalamic neuroendocrine (HYPOTHALAMIC HORMONES) regulation of pituitary function and the release of various PITUITARY HORMONES into the systemic circulation to maintain HOMEOSTASIS. Hypothalamic Hypophyseal System,Hypothalamo-Pituitary-Adrenal Axis,Hypophyseal Portal System,Hypothalamic-Pituitary Unit,Hypothalamic Hypophyseal Systems,Hypothalamic Pituitary Unit,Hypothalamo Hypophyseal System,Hypothalamo Pituitary Adrenal Axis,Portal System, Hypophyseal
D010913 Pituitary-Adrenal System The interactions between the anterior pituitary and adrenal glands, in which corticotropin (ACTH) stimulates the adrenal cortex and adrenal cortical hormones suppress the production of corticotropin by the anterior pituitary. Pituitary Adrenal System,Pituitary-Adrenal Systems,System, Pituitary-Adrenal,Systems, Pituitary-Adrenal
D003865 Depressive Disorder, Major Disorder in which five (or more) of the following symptoms have been present during the same 2-week period and represent a change from previous functioning; at least one of the symptoms is either (1) depressed mood or (2) loss of interest or pleasure. Symptoms include: depressed mood most of the day, nearly every daily; markedly diminished interest or pleasure in activities most of the day, nearly every day; significant weight loss when not dieting or weight gain; Insomnia or hypersomnia nearly every day; psychomotor agitation or retardation nearly every day; fatigue or loss of energy nearly every day; feelings of worthlessness or excessive or inappropriate guilt; diminished ability to think or concentrate, or indecisiveness, nearly every day; or recurrent thoughts of death, recurrent suicidal ideation without a specific plan, or a suicide attempt. (DSM-5) Depression, Involutional,Major Depressive Disorder,Melancholia, Involutional,Paraphrenia, Involutional,Psychosis, Involutional,Depressive Disorders, Major,Involutional Depression,Involutional Melancholia,Involutional Paraphrenia,Involutional Paraphrenias,Involutional Psychoses,Involutional Psychosis,Major Depressive Disorders,Paraphrenias, Involutional,Psychoses, Involutional
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D012307 Risk Factors An aspect of personal behavior or lifestyle, environmental exposure, inborn or inherited characteristic, which, based on epidemiological evidence, is known to be associated with a health-related condition considered important to prevent. Health Correlates,Risk Factor Scores,Risk Scores,Social Risk Factors,Population at Risk,Populations at Risk,Correlates, Health,Factor, Risk,Factor, Social Risk,Factors, Social Risk,Risk Factor,Risk Factor Score,Risk Factor, Social,Risk Factors, Social,Risk Score,Score, Risk,Score, Risk Factor,Social Risk Factor
D013313 Stress Disorders, Post-Traumatic A class of traumatic stress disorders with symptoms that last more than one month. Moral Injury,Neuroses, Post-Traumatic,PTSD,Post Traumatic Stress Disorder,Post-Traumatic Stress Disorders,Acute Post-Traumatic Stress Disorder,Chronic Post-Traumatic Stress Disorder,Delayed Onset Post-Traumatic Stress Disorder,Neuroses, Posttraumatic,Posttraumatic Stress Disorders,Stress Disorder, Post Traumatic,Stress Disorders, Posttraumatic,Acute Post Traumatic Stress Disorder,Chronic Post Traumatic Stress Disorder,Delayed Onset Post Traumatic Stress Disorder,Injury, Moral,Moral Injuries,Neuroses, Post Traumatic,Post Traumatic Stress Disorders,Post-Traumatic Neuroses,Post-Traumatic Stress Disorder,Posttraumatic Neuroses,Posttraumatic Stress Disorder,Stress Disorder, Post-Traumatic,Stress Disorder, Posttraumatic
D015897 Comorbidity The presence of co-existing or additional diseases with reference to an initial diagnosis or with reference to the index condition that is the subject of study. Comorbidity may affect the ability of affected individuals to function and also their survival; it may be used as a prognostic indicator for length of hospital stay, cost factors, and outcome or survival.
D059906 Neuroimaging Non-invasive methods of visualizing the CENTRAL NERVOUS SYSTEM, especially the brain, by various imaging modalities. Brain Imaging,Imaging, Brain

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