Abstract
Major depressive disorder (MDD) is a common psychiatric disorder effecting approximately 121 million people worldwide and recent reports from the World Health Organization (WHO) suggest that it will be the leading contributor to the global burden of diseases. At present, the most commonly used treatment strategies are still based on the monoamine hypothesis that has been the predominant theory in the last 60 years. Clinical observations show that only a subset of depressed patients exhibits full remission when treated with classical monoamine-based antidepressants together with the fact that patients exhibit multiple symptoms suggest that the pathophysiology leading to mood disorders may differ between patients. Accumulating evidence indicates that depression is a neural circuit disorder and that onset of depression may be located at different regions of the brain involving different transmitter systems and molecular mechanisms. This review synthesises findings from rodent studies from which emerges a role for different, yet interconnected, molecular systems and associated neural circuits to the aetiology of depression.
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Abbreviations
- 3V:
-
Third ventricle
- 4V:
-
Fourth ventricle
- 5-HT:
-
Serotonin
- AMPA:
-
α-Amino-3-hydroxy-5-methyl-4-isoxazolepropionic acid
- Arc:
-
Activity-regulated cytoskeleton-associated protein gene
- BDNF:
-
Brain-derived neurotrophic factor
- BLA:
-
Basolateral amygdala
- Ca2+ :
-
Calcium
- CaMKII:
-
Calcium/calmodulin-dependent protein kinase II
- CeM:
-
Central amygdala
- CPP:
-
3-(2-Carboxypiperazin-4-yl)propyl-1-phosphonic acid
- CRF:
-
Corticortrophin-releasing factor
- CSD:
-
Chronic social defeat
- CUS:
-
Chronic unpredictable stress
- D1:
-
Dopamine 1 receptor
- D2:
-
Dopamine 2 receptor
- D3V:
-
Dorsal third ventricle
- DBS:
-
Deep brain stimulation
- delta FosB:
-
Delta FBJ murine osteosarcoma viral oncogene homolog B
- DMH:
-
Dorsomedial nucleus of the hypothalamus
- DNMT:
-
DNA methyltransferase
- DRN:
-
Dorsal raphe nucleus
- eEF2:
-
Eukaryotic elongation factor
- Egr1:
-
Early growth response protein 1 gene
- ERK1/2:
-
Extracellular signal regulated kinase
- FosB:
-
FBJ murine osteosarcoma viral oncogene homolog B
- G9a:
-
Histone H3 lysine 9 methyltransferase
- GABA:
-
Gamma-aminobutyric acid
- GLP:
-
Histone H3 lysine 9 methyltransferase
- GluR1:
-
Glutamate receptor subunit 1
- GluR2:
-
Glutamate receptor subunit 2
- GluR3:
-
Glutamate receptor subunit 3
- GPo:
-
Globus pallidum
- H3K9me2:
-
Histone H3 dimethyl Lys9
- HATS:
-
Histone acetyltransferase
- HCN:
-
Hyperpolarisation-activated cyclic nucleotide-gated channel
- HDAC:
-
Histone deacetylase
- HDM:
-
Histone demethylase
- HMT:
-
Histone methyltransferase
- I h :
-
Hyperpolarisation-activated non-selective cation current
- IKK:
-
IKB kinase
- IKKdn:
-
IKK dominant negative
- IVF:
-
In vitro fertilisation
- K+ :
-
Potassium
- LC:
-
Locus coeruleus
- LDTg:
-
Laterodorsal tegmental nucleus
- LH:
-
Lateral hypothalamus
- LHb:
-
Lateral habenula
- LTD:
-
Laterodorsal tegmentum
- MAPK:
-
Mitogen-activated protein kinases
- MDD:
-
Major depressive disorder
- mGluR2:
-
Metabotropic glutamate receptor 2
- MK-801:
-
5-Methyl-10,11-dihydro-5H-dibenzo[a,d]cyclohepten-5,10-imine
- mper1/2:
-
Period gene 1 and 2
- mPFC:
-
Medial prefrontal cortex
- MSN:
-
Medium spiny neurons
- mTOR:
-
Mammalian target of rapamycin
- NAc:
-
Nucleus accumbens
- NFkB :
-
Nuclear factor kB
- NMDAR:
-
N-methyl-d-aspartate receptor
- NR2B:
-
NMDAR 2B subunit
- PPTg:
-
Pedunculopontine tegmental nucleus
- REM:
-
Rapid eye movement
- RMTg:
-
Rostromedial tegmental nucleus
- SC1:
-
Sparc-like 1
- SCN:
-
Suprachiasmatic nucleus
- SD:
-
Sleep deprivation
- SDT:
-
Sleep deprivation therapy
- SN:
-
Substrantia nigra
- SPZ:
-
Subparaventricular zone
- SSRI:
-
Serotonin selective reuptake inhibitor
- SUV39H1:
-
Histone-lysine N-methyltransferase
- vHIP:
-
Ventral hippocampus
- VP:
-
Ventral pallidum
- VSCC:
-
Voltage sensitive calcium channels
- VTA:
-
Ventral tegmental area
- WKY:
-
Wistar Kyoto
- ZFP:
-
Zing-finger protein
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Acknowledgments
This work was supported by the National Institute of Mental Health (MH092306: M.H.H.), Johnson & Johnson/International Mental Health Research Organization (M.H.H.), NARSAD Independent Investigator Award (M.H.H.), and NARSAD Young Investigator Award (D.C.).
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Chaudhury, D., Liu, H. & Han, MH. Neuronal correlates of depression. Cell. Mol. Life Sci. 72, 4825–4848 (2015). https://doi.org/10.1007/s00018-015-2044-6
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DOI: https://doi.org/10.1007/s00018-015-2044-6