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Interleukin-1 Receptor and Receptor Antagonist Gene Expression After Focal Stroke in Rats
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Zeitschriftentitel: | Stroke |
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Personen und Körperschaften: | , , , |
In: | Stroke, 28, 1997, 1, S. 155-162 |
Format: | E-Article |
Sprache: | Englisch |
veröffentlicht: |
Ovid Technologies (Wolters Kluwer Health)
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author_facet |
Wang, Xinkang Barone, Frank C. Aiyar, Nambi V. Feuerstein, Giora Z. Wang, Xinkang Barone, Frank C. Aiyar, Nambi V. Feuerstein, Giora Z. |
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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><.001) and remained elevated for up to 5 days (17.2-fold increase,<jats:italic>P</jats:italic><.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><.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><.05), reaching peak levels 12 hours (10.3-fold increase,<jats:italic>P</jats:italic><.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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10.1161/01.str.28.1.155 |
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1997 |
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Stroke |
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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><.001) and remained elevated for up to 5 days (17.2-fold increase,<jats:italic>P</jats:italic><.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><.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><.05), reaching peak levels 12 hours (10.3-fold increase,<jats:italic>P</jats:italic><.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><.001) and remained elevated for up to 5 days (17.2-fold increase,<jats:italic>P</jats:italic><.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><.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><.05), reaching peak levels 12 hours (10.3-fold increase,<jats:italic>P</jats:italic><.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><.001) and remained elevated for up to 5 days (17.2-fold increase,<jats:italic>P</jats:italic><.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><.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><.05), reaching peak levels 12 hours (10.3-fold increase,<jats:italic>P</jats:italic><.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 |