Kyung Hee University · Biochemistry, Genetics and Molecular Biology
Professor Hyung-Mun Yun's research lab focuses on neuropharmacology and molecular mechanisms underlying neurological and neuroinflammatory diseases, with a central emphasis on serotonin receptors—particularly the 5-HT6 receptor—as therapeutic targets for Alzheimer’s disease and depression. The lab investigates cell signaling pathways, glial cell modulation, and the role of endogenous antioxidants such as peroxiredoxin 6 in neurodegenerative and autoimmune disorders like multiple sclerosis. Additionally, the lab explores the use of functional biomaterials, including magnetic nanocomposite scaffolds, for tissue engineering and regenerative medicine. Their work bridges molecular neuroscience, neuroimmunology, and translational therapeutics.
Figures are computed from collected data and may differ slightly.
The human 5-HT(6) receptor (5-HT(6)R) is one of the latest cloned receptors among the known 5-HT receptors. Its abundant distribution in the limbic region, which participates in the control of mood and emotion and is involved in nervous system diseases such as depression and Alzheimer disease, has caused it to generate much interest. However, the cellular mechanisms of 5-HT(6)R are poorly understood. In the present study we found, using a yeast two-hybrid assay, that the carboxyl-terminal region
Serotonin (5-hydroxytryptamine, 5-HT) is an important neurotransmitter that is found in both the central and peripheral nervous systems. 5-HT mediates its diverse physiological responses through 7 different 5-HT receptor families: 5-HT(1), 5-HT(2), 5-HT(3), 5-HT(4), 5-HT(5), 5-HT(6), and 5-HT(7) receptors. Among them, the 5-HT(6) receptor (5-HT(6)R) is the most recently cloned serotonin receptor and plays important roles in the central nervous system (CNS) and in the etiology of neurological dis
Alzheimer's disease (AD) and depression in late life are one of the most severe health problems in the world disorders. Serotonin 6 receptor (5-HT6R) has caused much interest for potential roles in AD and depression. However, a causative role of perturbed 5-HT6R function between two diseases was poorly defined. In the present study, we found that a 5-HT6R antagonist, SB271036 rescued memory impairment by attenuating the generation of Aβ via the inhibition of γ-secretase activity and the inactiva
Magnetism is an intriguing physical cue that can alter the behaviors of a broad range of cells. Nanocomposite scaffolds that exhibit magnetic properties are thus considered useful 3D matrix for culture of cells and their fate control in repair and regeneration processes.
Multiple sclerosis (MS) is a complex disease with an unknown etiology and has no effective medications despite extensive research. Antioxidants suppress oxidative damages which are implicated in the pathogenesis of MS. In this study, we showed that the expression of an antioxidant protein peroxiredoxin 6 (PRDX6) is markedly increased in spinal cord of mice with experimental autoimmune encephalomyelitis (EAE) compared to other PRDXs. PRDX6 transgenic (Tg) mice displayed a significant decrease in
Inflammation is associated with cancer-prone microenvironment, leading to cancer. IL-32 is expressed in chronic inflammation-linked human cancers. To investigate IL-32α in inflammation-linked colorectal carcinogenesis, we generated a strain of mice, expressing IL-32 (IL-32α-Tg). In IL-32α-Tg mice, azoxymethane (AOM)-induced colon cancer incidence was decreased, whereas expression of TNFR1 and TNFR1-mediated apoptosis was increased. Also, IL-32α increased ROS production to induce prolonged JNK ac
Root bark of <i>Dictamnus dasycarpus</i> Turcz. has been widely used as a traditional medicine and is a well-known anti-inflammatory agent. We isolated limonoid triterpene, obacunone (Obac) from the dried root bark of <i>D. dasycarpus</i>. Obac has been reported to exhibit varieties of biological activities including anti-inflammatory, anti-cancer, and anti-oxidant effects. This study aimed to investigate the beneficial effects and biological mechanisms of Obac in osteoblast differentiation and
Serotonin is important in brain functions and involved in neurological diseases. It is also drawn considerable attention in bone disease since it mainly produced by the gut. Serotonin 6 G-protein-coupled receptor (5-HT6R) is clinical targets for the treatment of neurological diseases. However, 5-HT6R as a therapeutic target in bone has not been reported. Herein, we found that 5-HT6R showed higher expression in bone, and its expression was increased during bone remodeling and osteoblast different
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