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Neuroprotective effects of glyceryl nonivamide against microglia-like cells and 6-hydroxydopamine-induced neurotoxicity in SH-SY5Y human dopaminergic neuroblastoma cells. 2007

Yi-Chin Lin, and Hao-Wei Uang, and Rong-Jyh Lin, and Ing-Jun Chen, and Yi-Ching Lo
Department of Pharmacology and Graduate Institute of Pharmacology, College of Medicine, Kaohsiung Medical University, 100 Shih-Chuan 1st Rd., Kaohsiung 807, Taiwan.

Glyceryl nonivamide (GLNVA), a vanilloid receptor (VR) agonist, has been reported to have calcitonin gene-related peptide-associated vasodilatation and to prevent subarachnoid hemorrhage-induced cerebral vasospasm. In this study, we investigated the neuroprotective effects of GLNVA on activated microglia-like cell mediated- and proparkinsonian neurotoxin 6-hydroxydopamine (6-OHDA)-induced neurotoxicity in human dopaminergic neuroblastoma SH-SY5Y cells. In coculture conditions, we used lipopolysaccharide (LPS)-stimulated BV-2 cells as a model of activated microglia. LPS-induced neuronal death was significantly inhibited by diphenylene iodonium (DPI), an inhibitor of NADPH oxidase. However, capsazepine, the selective VR1 antagonist, did not block the neuroprotective effects of GLNVA. GLNVA reduced LPS-activated microglia-mediated neuronal death, but it lacked protection in DPI-pretreated cultures. GLNVA also decreased LPS activated microglia induced overexpression of neuronal nitric-oxide synthase (nNOS) and glycoprotein 91 phagocyte oxidase (gp91(phox)) on SH-SY5Y cells. Pretreatment of BV-2 cells with GLNVA diminished LPS-induced nitric oxide production, overexpression of inducible nitric-oxide synthase (iNOS), and gp91(phox) and intracellular reactive oxygen species (iROS). GLNVA also reduced cyclooxygenase (COX)-2 expression, inhibitor of nuclear factor (NF)-kappaB (IkappaB)alpha/IkappaBbeta degradation, NF-kappaB activation, and the overproduction of tumor necrosis factor-alpha, interleukin (IL)-1beta, and prostaglandin E2 in BV-2 cells. However, GLNVA augmented anti-inflammatory cytokine IL-10 production on LPS-stimulated BV-2 cells. Furthermore, in 6-OHDA-treated SH-SY5Y cells, GLNVA rescued the changes in condensed nuclear and apoptotic bodies, prevented the decrease in mitochondrial membrane potential, and reduced cells death. GLNVA also suppressed accumulation of iROS and up-regulated heme oxygenase-1 expression. 6-OHDA-induced overexpression of nNOS, iNOS, COX-2, and gp91(phox) was also reduced by GLNVA. In summary, the neuroprotective effects of GLNVA are mediated, at least in part, by decreasing the inflammation- and oxidative stress-associated factors induced by microglia and 6-OHDA.

UI MeSH Term Description Entries
D008070 Lipopolysaccharides Lipid-containing polysaccharides which are endotoxins and important group-specific antigens. They are often derived from the cell wall of gram-negative bacteria and induce immunoglobulin secretion. The lipopolysaccharide molecule consists of three parts: LIPID A, core polysaccharide, and O-specific chains (O ANTIGENS). When derived from Escherichia coli, lipopolysaccharides serve as polyclonal B-cell mitogens commonly used in laboratory immunology. (From Dorland, 28th ed) Lipopolysaccharide,Lipoglycans
D009447 Neuroblastoma A common neoplasm of early childhood arising from neural crest cells in the sympathetic nervous system, and characterized by diverse clinical behavior, ranging from spontaneous remission to rapid metastatic progression and death. This tumor is the most common intraabdominal malignancy of childhood, but it may also arise from thorax, neck, or rarely occur in the central nervous system. Histologic features include uniform round cells with hyperchromatic nuclei arranged in nests and separated by fibrovascular septa. Neuroblastomas may be associated with the opsoclonus-myoclonus syndrome. (From DeVita et al., Cancer: Principles and Practice of Oncology, 5th ed, pp2099-2101; Curr Opin Oncol 1998 Jan;10(1):43-51) Neuroblastomas
D009569 Nitric Oxide A free radical gas produced endogenously by a variety of mammalian cells, synthesized from ARGININE by NITRIC OXIDE SYNTHASE. Nitric oxide is one of the ENDOTHELIUM-DEPENDENT RELAXING FACTORS released by the vascular endothelium and mediates VASODILATION. It also inhibits platelet aggregation, induces disaggregation of aggregated platelets, and inhibits platelet adhesion to the vascular endothelium. Nitric oxide activates cytosolic GUANYLATE CYCLASE and thus elevates intracellular levels of CYCLIC GMP. Endogenous Nitrate Vasodilator,Mononitrogen Monoxide,Nitric Oxide, Endothelium-Derived,Nitrogen Monoxide,Endothelium-Derived Nitric Oxide,Monoxide, Mononitrogen,Monoxide, Nitrogen,Nitrate Vasodilator, Endogenous,Nitric Oxide, Endothelium Derived,Oxide, Nitric,Vasodilator, Endogenous Nitrate
D011485 Protein Binding The process in which substances, either endogenous or exogenous, bind to proteins, peptides, enzymes, protein precursors, or allied compounds. Specific protein-binding measures are often used as assays in diagnostic assessments. Plasma Protein Binding Capacity,Binding, Protein
D002211 Capsaicin An alkylamide found in CAPSICUM that acts at TRPV CATION CHANNELS. 8-Methyl-N-Vanillyl-6-Nonenamide,Antiphlogistine Rub A-535 Capsaicin,Axsain,Capsaicine,Capsicum Farmaya,Capsidol,Capsin,Capzasin,Gelcen,Katrum,NGX-4010,Zacin,Zostrix,8 Methyl N Vanillyl 6 Nonenamide,NGX 4010,NGX4010
D002470 Cell Survival The span of viability of a cell characterized by the capacity to perform certain functions such as metabolism, growth, reproduction, some form of responsiveness, and adaptability. Cell Viability,Cell Viabilities,Survival, Cell,Viabilities, Cell,Viability, Cell
D004298 Dopamine One of the catecholamine NEUROTRANSMITTERS in the brain. It is derived from TYROSINE and is the precursor to NOREPINEPHRINE and EPINEPHRINE. Dopamine is a major transmitter in the extrapyramidal system of the brain, and important in regulating movement. A family of receptors (RECEPTORS, DOPAMINE) mediate its action. Hydroxytyramine,3,4-Dihydroxyphenethylamine,4-(2-Aminoethyl)-1,2-benzenediol,Dopamine Hydrochloride,Intropin,3,4 Dihydroxyphenethylamine,Hydrochloride, Dopamine
D004797 Enzyme-Linked Immunosorbent Assay An immunoassay utilizing an antibody labeled with an enzyme marker such as horseradish peroxidase. While either the enzyme or the antibody is bound to an immunosorbent substrate, they both retain their biologic activity; the change in enzyme activity as a result of the enzyme-antibody-antigen reaction is proportional to the concentration of the antigen and can be measured spectrophotometrically or with the naked eye. Many variations of the method have been developed. ELISA,Assay, Enzyme-Linked Immunosorbent,Assays, Enzyme-Linked Immunosorbent,Enzyme Linked Immunosorbent Assay,Enzyme-Linked Immunosorbent Assays,Immunosorbent Assay, Enzyme-Linked,Immunosorbent Assays, Enzyme-Linked
D005990 Glycerol A trihydroxy sugar alcohol that is an intermediate in carbohydrate and lipid metabolism. It is used as a solvent, emollient, pharmaceutical agent, or sweetening agent. 1,2,3-Propanetriol,Glycerin,1,2,3-Trihydroxypropane,Glycerine
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man

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