Citalopram, 5-HT reuptake inhibitor

补充信息

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The serotonin transporter (SERT) also known as 5-HTT or SLC6A4 is an important protein that facilitates the reuptake of serotonin (5-HT) from the synaptic cleft back into the presynaptic neuron. This reuptake process terminates the serotonin signaling effectively controlling its availability in the brain. SERT is approximately 620 amino acids in length with a mass of around 70 kDa. Primarily expressed in the central nervous system it is also found in peripheral tissues. Its widespread presence highlights its critical role in regulating mood and cognition via serotonin modulation.

Biological function summary

The function of SERT impacts neurotransmitter balance significantly as it is integral to serotonin regulation. By removing serotonin from the synaptic cleft and recycling it SERT maintains neurotransmitter homeostasis. SERT is not usually part of a larger protein complex but acts independently to modulate serotonin levels. The activity of SERT affects various neurological processes contributing to mood maintenance and behavioral controls.

Pathways

Serotonin transporter influences the serotonin signaling pathway which is important for mood regulation and cognitive functions. It works alongside other proteins like monoamine oxidase which degrades serotonin and serotonin receptors that mediate its effects. Additionally SERT is involved in the pharmacological pathways of antidepressants. Escitalopram oxalate and other selective serotonin reuptake inhibitors (SSRIs) target SERT to block the reuptake of serotonin increasing its extracellular levels and synaptic availability.

SERT has a strong association with depressive disorders and anxiety due to its role in serotonin regulation. Alterations in SERT expression or function can lead to disruptions in the serotonergic system potentially resulting in mood disorders. SSRIs like escitalopram oxalate are well-known treatments that target SERT to alleviate symptoms. Moreover mutations and polymorphisms in the SERT gene have been linked to various psychiatric conditions illustrating a genetic connection to the protein’s function.