兴奋性突触后电位
抑制性突触后电位
谷氨酸受体
NMDA受体
维生素D与神经学
化学
肌醇
内分泌学
受体
内科学
神经科学
生物
生物化学
医学
出处
期刊:Pharmacological Reviews
[American Society for Pharmacology & Experimental Therapeutics]
日期:2017-02-15
卷期号:69 (2): 80-92
被引量:142
标识
DOI:10.1124/pr.116.013227
摘要
Depression is caused by a change in neural activity resulting from an increase in glutamate that drives excitatory neurons and may be responsible for the decline in the activity and number of the GABAergic inhibitory neurons. This imbalance between the excitatory and inhibitory neurons may contribute to the onset of depression. At the cellular level there is an increase in the concentration of intracellular Ca2+ within the inhibitory neurons that is driven by an increase in entry through the NMDA receptors (NMDARs) and through activation of the phosphoinositide signaling pathway that generates inositol trisphosphate (InsP3) that releases Ca2+ from the internal stores. The importance of these two pathways in driving the elevation of Ca2+ is supported by the fact that depression can be alleviated by ketamine that inhibits the NMDARs and scopolamine that inhibits the M1 receptors that drive InsP3/Ca2+ pathway. This increase in Ca2+ not only contributes to depression but it may also explain why individuals with depression have a strong likelihood of developing Alzheimer’s disease. The enhanced levels of Ca2+ may stimulate the formation of Aβ to initiate the onset and progression of Alzheimer9s disease. Just how vitamin D acts to reduce depression is unclear. The phenotypic stability hypothesis argues that vitamin D acts by reducing the increased neuronal levels of Ca2+ that are driving depression. This action of vitamin D depends on its function to maintain the expression of the Ca2+ pumps and buffers that reduce Ca2+ levels, which may explain how it acts to reduce the onset of depression.
科研通智能强力驱动
Strongly Powered by AbleSci AI