author_facet Wang, Xinkang
Barone, Frank C.
Aiyar, Nambi V.
Feuerstein, Giora Z.
Wang, Xinkang
Barone, Frank C.
Aiyar, Nambi V.
Feuerstein, Giora Z.
author Wang, Xinkang
Barone, Frank C.
Aiyar, Nambi V.
Feuerstein, Giora Z.
spellingShingle Wang, Xinkang
Barone, Frank C.
Aiyar, Nambi V.
Feuerstein, Giora Z.
Stroke
Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
Advanced and Specialized Nursing
Cardiology and Cardiovascular Medicine
Neurology (clinical)
author_sort wang, xinkang
spelling Wang, Xinkang Barone, Frank C. Aiyar, Nambi V. Feuerstein, Giora Z. 0039-2499 1524-4628 Ovid Technologies (Wolters Kluwer Health) Advanced and Specialized Nursing Cardiology and Cardiovascular Medicine Neurology (clinical) http://dx.doi.org/10.1161/01.str.28.1.155 <jats:p><jats:italic>Background and Purpose</jats:italic>The expression of interleukin-1β (IL-1β) is upregulated after focal brain ischemia, and previous work has demonstrated its involvement in ischemic injury. The IL-1 receptor antagonist (IL-1ra), a natural competitive antagonist of IL-1 receptors (IL-1Rs), has been demonstrated to play a role in attenuating brain ischemic injury. To hypothesize the involvement of the IL-1 system in ischemic injury, we examined other IL-1 components, including IL-1ra, IL-1RI, and IL-1RII for their mRNA expression after focal stroke.</jats:p><jats:p><jats:italic>Methods</jats:italic>Quantitative reverse transcription and polymerase chain reaction (RT-PCR) technique was used to examine the mRNA expression profile of IL-1ra and two IL-1R isoforms in a temporal fashion (n=4 for each time point) after permanent occlusion of the middle cerebral artery (MCAO) in spontaneously hypertensive rats. IL-1ra and IL-1R mRNA expression was confirmed by Northern blot analysis using poly(A) RNA isolated after 2 and 12 hours of MCAO.</jats:p><jats:p><jats:italic>Results</jats:italic>Very low levels of IL-1ra mRNA were detected in sham-operated or nonischemic cortex. IL-1ra mRNA in ischemic cortex was greatly increased at 12 hours (16.5-fold increase over sham samples,<jats:italic>P</jats:italic>&lt;.001) and remained elevated for up to 5 days (17.2-fold increase,<jats:italic>P</jats:italic>&lt;.01) after MCAO. IL-1RI mRNA was relatively highly expressed in normal cortex and was further elevated late after ischemic injury (3.3-fold increase at day 5,<jats:italic>P</jats:italic>&lt;.001). In contrast, the low basal expression of IL-1RII mRNA was remarkably elevated at 6 hours (5.3-fold increase,<jats:italic>P</jats:italic>&lt;.05), reaching peak levels 12 hours (10.3-fold increase,<jats:italic>P</jats:italic>&lt;.001) after MCAO.</jats:p><jats:p><jats:italic>Conclusions</jats:italic>Differential expression of IL-1β, IL-1ra, IL-1RI, and IL-1RII mRNAs after focal stroke may suggest a distinct role(s) for each component of the IL-1 system in ischemic injury. The data also stress the importance of evaluating all the components of a given cytokine system (eg, agonist, receptors, and natural antagonist) after focal stroke.</jats:p> Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats Stroke
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series Stroke
source_id 49
title Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_unstemmed Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_full Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_fullStr Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_full_unstemmed Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_short Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_sort interleukin-1 receptor and receptor antagonist gene expression after focal stroke in rats
topic Advanced and Specialized Nursing
Cardiology and Cardiovascular Medicine
Neurology (clinical)
url http://dx.doi.org/10.1161/01.str.28.1.155
publishDate 1997
physical 155-162
description <jats:p><jats:italic>Background and Purpose</jats:italic>The expression of interleukin-1β (IL-1β) is upregulated after focal brain ischemia, and previous work has demonstrated its involvement in ischemic injury. The IL-1 receptor antagonist (IL-1ra), a natural competitive antagonist of IL-1 receptors (IL-1Rs), has been demonstrated to play a role in attenuating brain ischemic injury. To hypothesize the involvement of the IL-1 system in ischemic injury, we examined other IL-1 components, including IL-1ra, IL-1RI, and IL-1RII for their mRNA expression after focal stroke.</jats:p><jats:p><jats:italic>Methods</jats:italic>Quantitative reverse transcription and polymerase chain reaction (RT-PCR) technique was used to examine the mRNA expression profile of IL-1ra and two IL-1R isoforms in a temporal fashion (n=4 for each time point) after permanent occlusion of the middle cerebral artery (MCAO) in spontaneously hypertensive rats. IL-1ra and IL-1R mRNA expression was confirmed by Northern blot analysis using poly(A) RNA isolated after 2 and 12 hours of MCAO.</jats:p><jats:p><jats:italic>Results</jats:italic>Very low levels of IL-1ra mRNA were detected in sham-operated or nonischemic cortex. IL-1ra mRNA in ischemic cortex was greatly increased at 12 hours (16.5-fold increase over sham samples,<jats:italic>P</jats:italic>&lt;.001) and remained elevated for up to 5 days (17.2-fold increase,<jats:italic>P</jats:italic>&lt;.01) after MCAO. IL-1RI mRNA was relatively highly expressed in normal cortex and was further elevated late after ischemic injury (3.3-fold increase at day 5,<jats:italic>P</jats:italic>&lt;.001). In contrast, the low basal expression of IL-1RII mRNA was remarkably elevated at 6 hours (5.3-fold increase,<jats:italic>P</jats:italic>&lt;.05), reaching peak levels 12 hours (10.3-fold increase,<jats:italic>P</jats:italic>&lt;.001) after MCAO.</jats:p><jats:p><jats:italic>Conclusions</jats:italic>Differential expression of IL-1β, IL-1ra, IL-1RI, and IL-1RII mRNAs after focal stroke may suggest a distinct role(s) for each component of the IL-1 system in ischemic injury. The data also stress the importance of evaluating all the components of a given cytokine system (eg, agonist, receptors, and natural antagonist) after focal stroke.</jats:p>
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author Wang, Xinkang, Barone, Frank C., Aiyar, Nambi V., Feuerstein, Giora Z.
author_facet Wang, Xinkang, Barone, Frank C., Aiyar, Nambi V., Feuerstein, Giora Z., Wang, Xinkang, Barone, Frank C., Aiyar, Nambi V., Feuerstein, Giora Z.
author_sort wang, xinkang
container_issue 1
container_start_page 155
container_title Stroke
container_volume 28
description <jats:p><jats:italic>Background and Purpose</jats:italic>The expression of interleukin-1β (IL-1β) is upregulated after focal brain ischemia, and previous work has demonstrated its involvement in ischemic injury. The IL-1 receptor antagonist (IL-1ra), a natural competitive antagonist of IL-1 receptors (IL-1Rs), has been demonstrated to play a role in attenuating brain ischemic injury. To hypothesize the involvement of the IL-1 system in ischemic injury, we examined other IL-1 components, including IL-1ra, IL-1RI, and IL-1RII for their mRNA expression after focal stroke.</jats:p><jats:p><jats:italic>Methods</jats:italic>Quantitative reverse transcription and polymerase chain reaction (RT-PCR) technique was used to examine the mRNA expression profile of IL-1ra and two IL-1R isoforms in a temporal fashion (n=4 for each time point) after permanent occlusion of the middle cerebral artery (MCAO) in spontaneously hypertensive rats. IL-1ra and IL-1R mRNA expression was confirmed by Northern blot analysis using poly(A) RNA isolated after 2 and 12 hours of MCAO.</jats:p><jats:p><jats:italic>Results</jats:italic>Very low levels of IL-1ra mRNA were detected in sham-operated or nonischemic cortex. IL-1ra mRNA in ischemic cortex was greatly increased at 12 hours (16.5-fold increase over sham samples,<jats:italic>P</jats:italic>&lt;.001) and remained elevated for up to 5 days (17.2-fold increase,<jats:italic>P</jats:italic>&lt;.01) after MCAO. IL-1RI mRNA was relatively highly expressed in normal cortex and was further elevated late after ischemic injury (3.3-fold increase at day 5,<jats:italic>P</jats:italic>&lt;.001). In contrast, the low basal expression of IL-1RII mRNA was remarkably elevated at 6 hours (5.3-fold increase,<jats:italic>P</jats:italic>&lt;.05), reaching peak levels 12 hours (10.3-fold increase,<jats:italic>P</jats:italic>&lt;.001) after MCAO.</jats:p><jats:p><jats:italic>Conclusions</jats:italic>Differential expression of IL-1β, IL-1ra, IL-1RI, and IL-1RII mRNAs after focal stroke may suggest a distinct role(s) for each component of the IL-1 system in ischemic injury. The data also stress the importance of evaluating all the components of a given cytokine system (eg, agonist, receptors, and natural antagonist) after focal stroke.</jats:p>
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spelling Wang, Xinkang Barone, Frank C. Aiyar, Nambi V. Feuerstein, Giora Z. 0039-2499 1524-4628 Ovid Technologies (Wolters Kluwer Health) Advanced and Specialized Nursing Cardiology and Cardiovascular Medicine Neurology (clinical) http://dx.doi.org/10.1161/01.str.28.1.155 <jats:p><jats:italic>Background and Purpose</jats:italic>The expression of interleukin-1β (IL-1β) is upregulated after focal brain ischemia, and previous work has demonstrated its involvement in ischemic injury. The IL-1 receptor antagonist (IL-1ra), a natural competitive antagonist of IL-1 receptors (IL-1Rs), has been demonstrated to play a role in attenuating brain ischemic injury. To hypothesize the involvement of the IL-1 system in ischemic injury, we examined other IL-1 components, including IL-1ra, IL-1RI, and IL-1RII for their mRNA expression after focal stroke.</jats:p><jats:p><jats:italic>Methods</jats:italic>Quantitative reverse transcription and polymerase chain reaction (RT-PCR) technique was used to examine the mRNA expression profile of IL-1ra and two IL-1R isoforms in a temporal fashion (n=4 for each time point) after permanent occlusion of the middle cerebral artery (MCAO) in spontaneously hypertensive rats. IL-1ra and IL-1R mRNA expression was confirmed by Northern blot analysis using poly(A) RNA isolated after 2 and 12 hours of MCAO.</jats:p><jats:p><jats:italic>Results</jats:italic>Very low levels of IL-1ra mRNA were detected in sham-operated or nonischemic cortex. IL-1ra mRNA in ischemic cortex was greatly increased at 12 hours (16.5-fold increase over sham samples,<jats:italic>P</jats:italic>&lt;.001) and remained elevated for up to 5 days (17.2-fold increase,<jats:italic>P</jats:italic>&lt;.01) after MCAO. IL-1RI mRNA was relatively highly expressed in normal cortex and was further elevated late after ischemic injury (3.3-fold increase at day 5,<jats:italic>P</jats:italic>&lt;.001). In contrast, the low basal expression of IL-1RII mRNA was remarkably elevated at 6 hours (5.3-fold increase,<jats:italic>P</jats:italic>&lt;.05), reaching peak levels 12 hours (10.3-fold increase,<jats:italic>P</jats:italic>&lt;.001) after MCAO.</jats:p><jats:p><jats:italic>Conclusions</jats:italic>Differential expression of IL-1β, IL-1ra, IL-1RI, and IL-1RII mRNAs after focal stroke may suggest a distinct role(s) for each component of the IL-1 system in ischemic injury. The data also stress the importance of evaluating all the components of a given cytokine system (eg, agonist, receptors, and natural antagonist) after focal stroke.</jats:p> Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats Stroke
spellingShingle Wang, Xinkang, Barone, Frank C., Aiyar, Nambi V., Feuerstein, Giora Z., Stroke, Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats, Advanced and Specialized Nursing, Cardiology and Cardiovascular Medicine, Neurology (clinical)
title Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_full Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_fullStr Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_full_unstemmed Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_short Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
title_sort interleukin-1 receptor and receptor antagonist gene expression after focal stroke in rats
title_unstemmed Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
topic Advanced and Specialized Nursing, Cardiology and Cardiovascular Medicine, Neurology (clinical)
url http://dx.doi.org/10.1161/01.str.28.1.155