New insights into the neurobiological mechanisms of major depressive disorders

General Hospital Psychiatry
Marc Fakhoury

Abstract

To review the current evidence about the neurobiological mechanisms in major depressive disorders (MDD) and the key findings from studies using neuroimaging tools and animal models. This paper gives an overview of the role of genetic and environmental factors in the pathophysiology of MDD and describes the structural changes in brain structures of depressed individuals. A closer look is given at the molecular processes and neurotransmitters implicated in this mental disorder. Moreover, this paper discusses key findings from recent research using animal models and their relevance for clinical applications. Although the exact cause of MDD is not known, there is enough evidence showing that genetic, psychological and environmental factors significantly increase the risk of developing this disease. Individuals affected by MDD exhibit a reduced volume of structures such as the amygdala, hippocampus and basal ganglia, as well as altered level of neurotransmitters in the brain. The studies presented in this review show promising results that could shed light on the molecular mechanisms of MDD. However, more work needs to be done to better understand this psychiatric disorder and promote the development of new treatment strategies.

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Citations

Jun 20, 2017·Brain Research Bulletin·Ming-Di JiangYu-Feng Wang
Jan 1, 2019·International Journal of Psychiatry in Clinical Practice·Abdullah GencOğuz Karamustafalıoğlu
Dec 14, 2018·Pharmacological Reports : PR·Paulina Jaworska-Andryszewska, Janusz K Rybakowski
Mar 25, 2017·Frontiers in Psychology·Manuela Macedonia, Claudia Repetto
Nov 22, 2017·Journal of Neural Transmission·Maxim ZavorotnyyC Konrad
Mar 21, 2017·European Archives of Psychiatry and Clinical Neuroscience·Mats BogrenC Mattisson
Mar 5, 2021·Reviews in the Neurosciences·Marc FakhouryNada Lawand
Sep 6, 2020·Progress in Neuro-psychopharmacology & Biological Psychiatry·Marc Fakhoury

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