Learn More
Nitric oxide is a ubiquitous and unique biological messenger molecule. It mediates blood vessel relaxation by endothelium, immune function of macrophages, and neurotransmission of central and peripheral nervous systems. Endothelial and neuronal nitric oxide synthases are constitutively expressed and activated by calcium entry into cells, whereas the(More)
Leucine-rich glioma inactivated 3 (LGI3) is a member of LGI/epitempin (EPTP) family. The biological function of LGI3 and its association with disease are not known. We previously reported that mouse LGI3 was highly expressed in brain in a developmentally and transcriptionally regulated manner. In this study, we identified syntaxin 1, a SNARE component in(More)
N-methyl-D-aspartate (NMDA) glutamate receptor-mediated increases in intracellular calcium are thought to play a critical role in synaptic plasticity. The mechanisms by which changes in cytoplasmic calcium transmit the glutamate signal to the nucleus, which is ultimately important for long-lasting neuronal responses, are poorly understood. We show that NMDA(More)
Nitric oxide (NO) is a widespread and multifunctional biological messenger molecule. It mediates vasodilation of blood vessels, host defence against infectious agents and tumors, and neurotransmission of the central and peripheral nervous systems. In the nervous system, NO is generated by three nitric oxide synthase (NOS) isoforms (neuronal, endothelial and(More)
In skeletal muscle, neuronal nitric oxide synthase (nNOS) is anchored to the sarcolemma via the dystrophin-glycoprotein complex. When dystrophin is absent, as in Duchenne muscular dystrophy patients and in mdx mice, nNOS is mislocalized to the interior of the muscle fiber where it continues to produce nitric oxide. This has led to the hypothesis that free(More)
NMDA-type glutamate receptor-mediated increases in intracellular calcium play a critical role in synaptic plasticity involved in learning and memory. Calcium-dependent activation of Ras and extracellular signal-regulated kineses (Erks) may transmit the glutamate signal to the nucleus which is ultimately important for long-lasting neuronal responses. The(More)
Membrane depolarization promotes neuronal survival through increases in intracellular calcium. Nitric oxide (NO) is a signaling molecule involved in many neuronal activity-dependent events. Since neuronal NO is generated by NO synthase (NOS) in a calcium-dependent manner and was shown to promote cell survival, we tested whether NO is involved in(More)
  • Chang Seok Park, Hyun Lim, +7 authors Nyoun Soo Kwon
  • 2004
Nitric oxide (NO) has various physiological functions. However, uncontrolled overproduction of NO can be toxic in many pathologic conditions involving inflammatory tissue damage. In the present study, we examined effects of 23,24-dihydrocucurbitacin D (DHCD) isolated from the root of Bryonia alba L. on macrophage NO generation. DHCD (<80 microM) effectively(More)
Leucine-rich glioma inactivated 3 (LGI3) is a secreted protein that belongs to LGI/epitempin family. LGI3 is highly expressed in brain in a transcriptionally and developmentally regulated manner. Here we found that LGI3 induced neurite outgrowth in Neuro-2a cells and dorsal root ganglia explants. LGI3 treatment or overexpression increased neurite outgrowth(More)
This study investigated the effects of proline-serine (PS) and valine-serine (VS) dipeptides on melanogenesis in Mel-Ab cells. Proline-serine and VS significantly inhibited melanin synthesis in a concentration-dependent manner, though neither dipeptide directly inhibited tyrosinase activity in a cell-free system. Both PS and VS down-regulated the expression(More)