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rdf:type |
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lifeskim:mentions |
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pubmed:issue |
19
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pubmed:dateCreated |
2002-9-27
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pubmed:abstractText |
Aminoglycoside exposure results in the apoptotic destruction of auditory and vestibular hair cells. This ototoxic hair cell death is prevented by broad-spectrum caspase inhibition. We have used in situ substrate detection, immunohistochemistry, and specific caspase inhibitors to determine which caspases are activated in the hair cells of the adult mouse utricle in response to neomycin exposure in vitro. In addition, we have examined the hierarchy of caspase activation. Our data indicate that both upstream caspase-8 and upstream caspase-9, as well as downstream caspase-3 are activated in hair cells exposed to neomycin. The inhibition of caspase-9-like activity provided significant protection of hair cells exposed to neomycin, whereas the inhibition of caspase-8-like activity was not effective in preventing neomycin-induced hair cell death. In addition, caspase-9 inhibition prevented the activation of downstream caspase-3, whereas the inhibition of caspase-8 did not. These data indicate that caspase-9 is the primary upstream caspase mediating neomycin-induced hair cell death in this preparation.
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pubmed:grant |
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pubmed:language |
eng
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pubmed:journal |
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pubmed:citationSubset |
IM
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pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Amino Acid Chloromethyl Ketones,
http://linkedlifedata.com/resource/pubmed/chemical/Anti-Bacterial Agents,
http://linkedlifedata.com/resource/pubmed/chemical/Calcium-Binding Protein, Vitamin...,
http://linkedlifedata.com/resource/pubmed/chemical/Calmodulin,
http://linkedlifedata.com/resource/pubmed/chemical/Caspases,
http://linkedlifedata.com/resource/pubmed/chemical/Cysteine Proteinase Inhibitors,
http://linkedlifedata.com/resource/pubmed/chemical/Neomycin,
http://linkedlifedata.com/resource/pubmed/chemical/Neuroprotective Agents,
http://linkedlifedata.com/resource/pubmed/chemical/benzyloxycarbonylvalyl-alanyl-aspart...,
http://linkedlifedata.com/resource/pubmed/chemical/calbindin
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pubmed:status |
MEDLINE
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pubmed:month |
Oct
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pubmed:issn |
1529-2401
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pubmed:author |
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pubmed:issnType |
Electronic
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pubmed:day |
1
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pubmed:volume |
22
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pubmed:owner |
NLM
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pubmed:authorsComplete |
Y
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pubmed:pagination |
8532-40
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pubmed:dateRevised |
2007-11-15
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pubmed:meshHeading |
pubmed-meshheading:12351727-Amino Acid Chloromethyl Ketones,
pubmed-meshheading:12351727-Animals,
pubmed-meshheading:12351727-Anti-Bacterial Agents,
pubmed-meshheading:12351727-Calcium-Binding Protein, Vitamin D-Dependent,
pubmed-meshheading:12351727-Calmodulin,
pubmed-meshheading:12351727-Caspases,
pubmed-meshheading:12351727-Cell Count,
pubmed-meshheading:12351727-Cell Death,
pubmed-meshheading:12351727-Culture Techniques,
pubmed-meshheading:12351727-Cysteine Proteinase Inhibitors,
pubmed-meshheading:12351727-Dose-Response Relationship, Drug,
pubmed-meshheading:12351727-Enzyme Activation,
pubmed-meshheading:12351727-Hair Cells, Auditory,
pubmed-meshheading:12351727-Immunochemistry,
pubmed-meshheading:12351727-Mice,
pubmed-meshheading:12351727-Mice, Inbred CBA,
pubmed-meshheading:12351727-Neomycin,
pubmed-meshheading:12351727-Neuroprotective Agents,
pubmed-meshheading:12351727-Saccule and Utricle
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pubmed:year |
2002
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pubmed:articleTitle |
Caspase activation in hair cells of the mouse utricle exposed to neomycin.
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pubmed:affiliation |
Virginia Merrill Bloedel Hearing Research Center and Department of Otolaryngology-Head and Neck Surgery, University of Washington, Seattle, Washington 98195-7293, USA.
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pubmed:publicationType |
Journal Article,
Research Support, U.S. Gov't, P.H.S.
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