ERK1/2 inhibition attenuates cerebral blood flow reduction and abolishes ET(B) and 5-HT(1B) receptor upregulation after subarachnoid hemorrhage in rat.
(2006) In Journal of Cerebral Blood Flow and Metabolism 26(Nov 2). p.846-856- Abstract
- Upregulation of endothelin B (ETB) and 5-hydroxytryptamine 1B (5-HT1B) receptors via transcription has been found after experimental subarachnoid hemorrhage (SAH), and this is associated with enhanced phosphorylation of the mitogen-activated protein kinase ( MAPK) extracellular signal-regulated kinase ( ERK1/2). In the present study, we hypothesized that inhibition of ERK1/2 alters the ETB and 5-HT1B receptor upregulation and at the same time prevents the sustained cerebral blood flow (CBF) reduction associated with SAH. The ERK1/2 inhibitor SB386023-b was injected intracisternally in conjunction with and after the induced SAH in rats. At 2 days after the SAH, cerebral arteries were harvested for quantitative real-time polymerase chain... (More)
- Upregulation of endothelin B (ETB) and 5-hydroxytryptamine 1B (5-HT1B) receptors via transcription has been found after experimental subarachnoid hemorrhage (SAH), and this is associated with enhanced phosphorylation of the mitogen-activated protein kinase ( MAPK) extracellular signal-regulated kinase ( ERK1/2). In the present study, we hypothesized that inhibition of ERK1/2 alters the ETB and 5-HT1B receptor upregulation and at the same time prevents the sustained cerebral blood flow (CBF) reduction associated with SAH. The ERK1/2 inhibitor SB386023-b was injected intracisternally in conjunction with and after the induced SAH in rats. At 2 days after the SAH, cerebral arteries were harvested for quantitative real-time polymerase chain reaction, immunohistochemistry and analysis of contractile responses to endothelin-1 (ET-1; ETA and ETB receptor agonist) and 5-carboxamidotryptamine (5-CT; 5-HT1 receptor agonist) in a sensitive myograph. To investigate if ERK1/2 inhibition had an influence on the local and global CBF after SAH, an autoradiographic technique was used. At 48 h after induced SAH, global and regional CBF were reduced by 50%. This reduction was prevented by treatment with SB386023-b. The ERK1/2 inhibition also decreased the maximum contraction elicited by application of ET-1 and 5-CT in cerebral arteries compared with SAH. In parallel, ERK1/2 inhibition downregulated ETB and 5-HT1B receptor messenger ribonucleic acid and protein levels compared with the SAH. Cerebral ischemia after SAH involves vasoconstriction and subsequent reduction in the CBF. The results suggest that ERK1/2 inhibition might be a potential treatment for the prevention of cerebral vasospasm and ischemia associated with SAH. (Less)
Please use this url to cite or link to this publication:
https://lup.lub.lu.se/record/148318
- author
- Ansar, Saema LU ; Hansen-Schwartz, Jacob A ; Vikman, Petter LU ; Xu, Cang-Bao LU and Edvinsson, Lars LU
- organization
- publishing date
- 2006
- type
- Contribution to journal
- publication status
- published
- subject
- keywords
- ETB receptor, cerebral blood flow (CBF), cerebral ischemia, subarachnoid hemorrhage (SAH), 5-HT1B receptor, extracellular signal-regulated kinase (ERK1/2)
- in
- Journal of Cerebral Blood Flow and Metabolism
- volume
- 26
- issue
- Nov 2
- pages
- 846 - 856
- publisher
- Nature Publishing Group
- external identifiers
-
- pmid:16251886
- wos:000237752200011
- scopus:33745698916
- ISSN
- 1559-7016
- DOI
- 10.1038/sj.jcbfm.9600236
- language
- English
- LU publication?
- yes
- id
- af3de89a-7929-4054-8765-ad2222b022b0 (old id 148318)
- alternative location
- http://www.ncbi.nlm.nih.gov/entrez/query.fcgi?cmd=Retrieve&db=PubMed&list_uids=16251886&dopt=Abstract
- date added to LUP
- 2016-04-01 16:11:40
- date last changed
- 2024-01-11 03:16:53
@article{af3de89a-7929-4054-8765-ad2222b022b0,
abstract = {{Upregulation of endothelin B (ETB) and 5-hydroxytryptamine 1B (5-HT1B) receptors via transcription has been found after experimental subarachnoid hemorrhage (SAH), and this is associated with enhanced phosphorylation of the mitogen-activated protein kinase ( MAPK) extracellular signal-regulated kinase ( ERK1/2). In the present study, we hypothesized that inhibition of ERK1/2 alters the ETB and 5-HT1B receptor upregulation and at the same time prevents the sustained cerebral blood flow (CBF) reduction associated with SAH. The ERK1/2 inhibitor SB386023-b was injected intracisternally in conjunction with and after the induced SAH in rats. At 2 days after the SAH, cerebral arteries were harvested for quantitative real-time polymerase chain reaction, immunohistochemistry and analysis of contractile responses to endothelin-1 (ET-1; ETA and ETB receptor agonist) and 5-carboxamidotryptamine (5-CT; 5-HT1 receptor agonist) in a sensitive myograph. To investigate if ERK1/2 inhibition had an influence on the local and global CBF after SAH, an autoradiographic technique was used. At 48 h after induced SAH, global and regional CBF were reduced by 50%. This reduction was prevented by treatment with SB386023-b. The ERK1/2 inhibition also decreased the maximum contraction elicited by application of ET-1 and 5-CT in cerebral arteries compared with SAH. In parallel, ERK1/2 inhibition downregulated ETB and 5-HT1B receptor messenger ribonucleic acid and protein levels compared with the SAH. Cerebral ischemia after SAH involves vasoconstriction and subsequent reduction in the CBF. The results suggest that ERK1/2 inhibition might be a potential treatment for the prevention of cerebral vasospasm and ischemia associated with SAH.}},
author = {{Ansar, Saema and Hansen-Schwartz, Jacob A and Vikman, Petter and Xu, Cang-Bao and Edvinsson, Lars}},
issn = {{1559-7016}},
keywords = {{ETB receptor; cerebral blood flow (CBF); cerebral ischemia; subarachnoid hemorrhage (SAH); 5-HT1B receptor; extracellular signal-regulated kinase (ERK1/2)}},
language = {{eng}},
number = {{Nov 2}},
pages = {{846--856}},
publisher = {{Nature Publishing Group}},
series = {{Journal of Cerebral Blood Flow and Metabolism}},
title = {{ERK1/2 inhibition attenuates cerebral blood flow reduction and abolishes ET(B) and 5-HT(1B) receptor upregulation after subarachnoid hemorrhage in rat.}},
url = {{http://dx.doi.org/10.1038/sj.jcbfm.9600236}},
doi = {{10.1038/sj.jcbfm.9600236}},
volume = {{26}},
year = {{2006}},
}