Minocycline inhibits apoptotic cell death via attenuation of TNF-α expression following iNOS/NO induction by lipopolysaccharide in neuron/glia co-cultures Export

@article{citeulike:5062492, abstract = {We attempted to ascertain the neuroprotective effects and mechanisms of minocycline in inflammatory-mediated neurotoxicity using primary neuron/glia co-cultures treated with lipopolysaccharide (LPS). Neuronal cell death was induced by treatment with LPS for 48 h, and the cell damage was assessed using lactate dehydrogenase (LDH) assays and by counting microtubule-associated protein-2 (MAP-2) positive cells. Through terminal transferase deoxyuridine triphosphate-biotin nick end labeling (TUNEL)-staining and by measuring caspase-3 activity, we found that LPS-induced neuronal cell death was mediated by apoptosis. We determined that pre-treatment with minocycline significantly inhibited LPS-induced neuronal cell death. In addition, LPS induced inducible nitric oxide synthase (iNOS) expression significantly, resulting in nitric oxide (NO) production within glial cells, but not in neurons. Both nitric oxide synthase (NOS) inhibitors (NG-monomethyl-l-arginine monoacetate (l-NMMA) and S-methylisothiourea sulfate (SMT)) and minocycline inhibited iNOS expression and NO release, and increased neuronal survival in neuron/glia co-cultures. Pre-treatment with minocycline significantly inhibited the rapid and extensive production of tumor necrosis factor-alpha (TNF-03B1) mediated by LPS in glial cells. We also determined that the signaling cascade of LPS-mediated iNOS induction and NO production was mediated by TNF-03B1 by using neutralizing antibodies to TNF-03B1. Consequently, our results show that the neuroprotective effect of minocycline is associated with inhibition of iNOS induction and NO production in glial cells, which is mediated by the LPS-induced production of TNF-03B1.}, address = {Biomedical Research Center, Korea Institute of Science and Technology, Seoul, Korea; College of Pharmacy, Seoul National University, Seoul, Korea; Department of Biology, Yonsei University, Seoul, Korea; Department of Anatomy \& Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland, USA}, author = {Lee, Sang M. and Yune, Tae Y. and Kim, Sun J. and Kim, Young C. and Oh, Young J. and Markelonis, George J. and Oh, Tae H.}, citeulike-article-id = {5062492}, citeulike-linkout-0 = {http://dx.doi.org/10.1111/j.1471-4159.2004.02780.x}, citeulike-linkout-1 = {http://www3.interscience.wiley.com/cgi-bin/abstract/118757747/ABSTRACT}, doi = {10.1111/j.1471-4159.2004.02780.x}, journal = {Journal of Neurochemistry}, number = {3}, pages = {568--578}, posted-at = {2009-07-05 10:11:13}, priority = {3}, title = {Minocycline inhibits apoptotic cell death via attenuation of TNF-\&\#x03B1; expression following iNOS/NO induction by lipopolysaccharide in neuron/glia co-cultures}, url = {http://dx.doi.org/10.1111/j.1471-4159.2004.02780.x}, volume = {91}, year = {2004} }

TY - JOUR ID - citeulike:5062492 L3 - citeulike-article-id:5062492 N2 - We attempted to ascertain the neuroprotective effects and mechanisms of minocycline in inflammatory-mediated neurotoxicity using primary neuron/glia co-cultures treated with lipopolysaccharide (LPS). Neuronal cell death was induced by treatment with LPS for 48 h, and the cell damage was assessed using lactate dehydrogenase (LDH) assays and by counting microtubule-associated protein-2 (MAP-2) positive cells. Through terminal transferase deoxyuridine triphosphate-biotin nick end labeling (TUNEL)-staining and by measuring caspase-3 activity, we found that LPS-induced neuronal cell death was mediated by apoptosis. We determined that pre-treatment with minocycline significantly inhibited LPS-induced neuronal cell death. In addition, LPS induced inducible nitric oxide synthase (iNOS) expression significantly, resulting in nitric oxide (NO) production within glial cells, but not in neurons. Both nitric oxide synthase (NOS) inhibitors (NG-monomethyl-l-arginine monoacetate (l-NMMA) and S-methylisothiourea sulfate (SMT)) and minocycline inhibited iNOS expression and NO release, and increased neuronal survival in neuron/glia co-cultures. Pre-treatment with minocycline significantly inhibited the rapid and extensive production of tumor necrosis factor-alpha (TNF-03B1) mediated by LPS in glial cells. We also determined that the signaling cascade of LPS-mediated iNOS induction and NO production was mediated by TNF-03B1 by using neutralizing antibodies to TNF-03B1. Consequently, our results show that the neuroprotective effect of minocycline is associated with inhibition of iNOS induction and NO production in glial cells, which is mediated by the LPS-induced production of TNF-03B1. IS - 3 JF - Journal of Neurochemistry AD - Biomedical Research Center, Korea Institute of Science and Technology, Seoul, Korea; College of Pharmacy, Seoul National University, Seoul, Korea; Department of Biology, Yonsei University, Seoul, Korea; Department of Anatomy & Neurobiology, University of Maryland School of Medicine, Baltimore, Maryland, USA EP - 578 TI - Minocycline inhibits apoptotic cell death via attenuation of TNF-α expression following iNOS/NO induction by lipopolysaccharide in neuron/glia co-cultures VL - 91 SP - 568 AU - Lee, Sang AU - Yune, Tae AU - Kim, Sun AU - Kim, Young AU - Oh, Young AU - Markelonis, George AU - Oh, Tae PY - 2004/// UR - http://dx.doi.org/10.1111/j.1471-4159.2004.02780.x ER -