Linked Life Data

11476590

Source:http://linkedlifedata.com/resource/pubmed/id/11476590

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
2001-7-30
pubmed:abstractText
Spinal cord injury (SCI) initiates biochemical events that lead to an increase in extracellular excitatory amino acid concentrations, resulting in glutamate receptor-mediated excitotoxic events. These receptors include the three groups of metabotropic glutamate receptors (mGluRs). Group I mGluR activation can initiate a number of intracellular pathways that increase neuronal excitability. Group II and III mGluRs may function as autoreceptors to modulate neurotransmission. Thus, all three groups may contribute to the mechanisms of central sensitization and chronic central pain. To begin evaluating mGluRs in SCI, we quantified the changes in mGluR expression after SCI in control (naive), sham, and impact injured adult male Sprague-Dawley rats (200-250 g). SCI was produced at spinal segment T10 with a New York University impactor (12.5-mm drop, 10-g rod of 2-mm diameter). Expression levels were determined by Western blot and immunohistochemistry analyses at the epicenter of injury, as well as segments rostral and caudal. The group I subtype mGluR1 was increased over control levels in segments rostral and caudal by postsurgical day (PSD) 7 and remained elevated through PSD 60. The group I subtype mGluR5 was unchanged in all segments rostral and caudal to the injury at every time point measured. Group II mGluRs were decreased compared to control levels from PSD 7 through PSD 60 in all segments. These results suggest that different subtypes of mGluRs have different spatial and temporal expression patterns following SCI. The expression changes in mGluRs parallel the development of mechanical allodynia and thermal hyperalgesia following SCI; therefore, understanding the expression of mGluRs after SCI may give insight into mechanisms underlying the development of chronic central pain.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Aug
pubmed:issn
0014-4886
pubmed:author
pubmed:copyrightInfo
Copyright 2001 Academic Press.
pubmed:issnType
Print
pubmed:volume
170
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
244-57
pubmed:dateRevised
2007-11-14
pubmed:meshHeading
pubmed:year
2001
pubmed:articleTitle
Changes in metabotropic glutamate receptor expression following spinal cord injury.
pubmed:affiliation
The Department of Anatomy and Neuroscience, The University of Texas Medical Branch at Galveston, Galveston, Texas 77555-1043, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S., Research Support, Non-U.S. Gov't