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The serotonin transporter (SERT) is one of the neurotransmitter transporters that plays a critical role in the regulation of endogenous amine concentrations and therefore is an important target for therapeutic agents affecting the central nervous system. The recently published, high resolution X-ray structure of the closely related amino acid transporter, Aquifex aeolicus leucine transporter (LeuT), provides an opportunity to develop a three-dimensional model of the structure of SERT. We present herein a homology model of SERT using LeuT as the template and containing escitalopram as a bound ligand. Our model explains selectivities known from mutational studies and varying ligand data, which are discussed and illustrated in the paper.
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http://dx.doi.org/10.1002/cmdc.200600242 | DOI Listing |
Phytomedicine
August 2025
Laboratory of Neurological Disease Modeling and Translational Research, West China Hospital, Sichuan University, Chengdu, 610041, China. Electronic address:
Background: Stress is a prevalent mental health concern that often emerges in late adolescence or early adulthood. Since 2007, the Food and Drug Administration (FDA) has not approved any novel anxiolytic pharmaceuticals, leading to increased interest in nutritional supplements as alternative therapies for stress management.
Purpose: Building on our previous study, this work aims to investigate the synergistic effects of Theanine (Th) and Walnut Peptide (WP) on stress mitigation and cognitive enhancement.
Int J Mol Med
November 2025
School of Acupuncture and Tuina, Chengdu University of Traditional Chinese Medicine, Chengdu, Sichuan 611137, P.R. China.
Enterochromaffin (EC) cell dysfunction decreases 5‑hydroxytryptamine (5‑HT) secretion, contributing to functional constipation (FC). However, the underlying mechanisms remain unclear. Piezo ion channels mediate 5‑HT release from EC cells.
View Article and Find Full Text PDFPsychopharmacology (Berl)
September 2025
Department of Allied Health Sciences, Chitkara School of Health Sciences, Chitkara University, Punjab, 140401, India.
Quercetin, a naturally occurring flavonoid, has been found to be a potential agent for the treatment of major depressive disorder (MDD), given the complexity of its interaction with the serotonin transporter (SERT). Clinically, quercetin has direct and indirect modulatory effects as opposed to conventional selective serotonin reuptake inhibitors (SSRI), which act mainly by inhibiting SERT after a time delay and communicate with SERT through possible binding location preferences and allosteric processing, while simultaneously controlling its definite expression through anti-inflammatory and antioxidant pathways, such as the NF-kB, AMPK/SIRT-1, and Nrf2-ARE cascades. These processes assist in modifying serotonergic neurotransmission and minimizing oxidative and inflammatory strains, which are the major contributors to the pathophysiology of depression.
View Article and Find Full Text PDFSynapse
September 2025
School of First Clinical, Ningxia Medical University, Yinchuan, Ningxia, China.
Obsessive-compulsive disorder (OCD) is a chronic and debilitating psychiatric condition characterized by persistent, intrusive thoughts (obsessions) and repetitive ritualistic behaviors (compulsions). Accumulating evidence suggests that individuals with OCD demonstrate marked cognitive impairments, especially in executive function domains, including cognitive flexibility and working memory. Although existing therapeutic approaches (e.
View Article and Find Full Text PDFNeurol Ther
September 2025
Department of Neurology, The First Affiliated Hospital with Nanjing Medical University, No. 300 Guangzhou Road, Nanjing, 210029, China.
Introduction: The pathogenesis of levodopa-induced dyskinesia (LID) in Parkinson's disease (PD) remains uncertain. Our work sought to examine the cortical gyrification pattern and its corresponding functional connectivity alterations, along with the underlying neurotransmitter information, in LID of PD.
Methods: We included 30 PD patients with LID (PD-LID group), 30 without LID (PD-NLID group), and 30 age- and gender-matched healthy controls (HC group).