Original Literature | Model OverView |
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Publication
Title
Multifunctional effects of bradykinin on glial cells in relation to potentialanti-inflammatory effects.
Affiliation
Laboratory of Pathophysiology, Graduate School of Pharmaceutical Sciences,Kyushu University, Fukuoka 812-8582, Japan. noda@phar.kyushu-u.ac.jp
Abstract
Kinins have been reported to be produced and act at the site of injury andinflammation. Despite many reports that they are likely to initiate a particularcascade of inflammatory events, bradykinin (BK) has anti-inflammatory effects inthe brain mediated by glial cells. In the present review, we have attempted todescribe the complex responses and immediate reaction of glial cells to BK.Glial cells express BK receptors and induce Ca(2+)-dependent signal cascades.Among them, production of prostaglandin E(2) (PGE(2)), via B(1) receptors inprimary cultured microglia, has a negative feedback effect on lipopolysaccharide(LPS)-induced release of tumor necrosis factor-alpha (TNF-alpha) via increasingintracellular cyclic adenosine monophosphate (cAMP). In addition, BKup-regulates the production of neurotrophic factors such as nerve growth factor(NGF) via B(2) receptors in astrocytes. These results suggest that BK may haveanti-inflammatory and neuroprotective effects in the brain through multiplefunctions on glial cells. These observations may help to understand the paradoxon the role of kinins in the central nervous system and may be useful fortherapeutic strategy.
PMID
17669557
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PMID: 17669557, 15240011, 15991247, 16935468, 10501190 In astrocytes, BK induced expression of matrix metalloproteinase-9, phospholipase A2 and COX-2 and increased expression and secretion of IL-6
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PMID: 17669557, 17402969 BK receptors in microglia mediate anti-inflammatory or neuroprotective effects, namely the inhibition of LPS-induced release of TNF-¦Á and IL-1¦Â.
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PMID: 17669557 BK-induced Ca2+ rises in primary cultured microglia were observed.
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PMID: 17669557 ATP binds to receptor P2X and P2Y.
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PMID: 17669557 ATP evoked an increase of [Ca2+] even in cells which did not respond to BK, suggesting that the majority of cultured microglial cells possess ATP receptors while only a minority have functional BK receptors.
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PMID: 17669557 ATP evoked an increase of [Ca2+] even in cells which did not respond to BK, suggesting that the majority of cultured microglial cells possess ATP receptors while only a minority have functional BK receptors.
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PMID: 17669557 ATP binds to receptor P2X and P2Y.
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PMID: 17669557 The immunocytochemical analysis using a specific antibody against iNOS showed stronger expression of iNOS in BK-treated microglia identified by isolectin B4-labeling.
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PMID: 17669557 The immunocytochemical analysis using a specific antibody against iNOS showed stronger expression of iNOS in BK-treated microglia identified by isolectin B4-labeling. PMID: 17669557 This increase was prevented by the treatment of the cells with 10 ¦ÌM BAPTA-AM, a membrane-permeable Ca2+ chelator, hinting to a link between BK induced Ca2+ signaling and iNOS expression.
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PMID: 17669557, 12551746, 15145558 In microglia, the inducible expression of B1 was shown by application of LPS and BK.
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PMID: 17669557 Bradykinin binds to receptor BDKRB1.
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PMID: 17669557, 12551746, 15145558 In microglia, the inducible expression of B1 was shown by application of LPS and BK.
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PMID: 17669557 PGE2 release was also increased in astrocytes after application of LPS or BK.
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PMID: 17669557 PGE2 release was also increased in astrocytes after application of LPS or BK.
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PMID: 17669557 BK also up-regulated mRNA for neurotrophic factors such as nerve growth factor (NGF).
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PMID: 17669557 BK and ET, but not substance P (SubP) at concentration of 100 nM increased the mRNA level for NGF.
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PMID: 17669557 Endothelin-1 binds to its receptor.
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PMID: 17669557 We also observed up-regulation of brain-derived neurotrophic factor (BDNF) mRNA level.
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PMID: 17669557 The amount of NGF was significantly increased by 100 nM BK after 6 h, but not after 3 h of incubation in accordance with the time course of up-regulation of NGF mRNA level.
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PMID: 17669557, 15240011, 15991247, 16935468, 10501190 In astrocytes, BK induced expression of matrix metalloproteinase-9, phospholipase A2 and COX-2 and increased expression and secretion of IL-6
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PMID: 17669557, 15240011, 15991247, 16935468, 10501190 In astrocytes, BK induced expression of matrix metalloproteinase-9, phospholipase A2 and COX-2 and increased expression and secretion of IL-6
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PMID: 17669557, 15240011, 15991247, 16935468, 10501190 In astrocytes, BK induced expression of matrix metalloproteinase-9, phospholipase A2 and COX-2 and increased expression and secretion of IL-6.
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PMID: 17669557, 15240011, 15991247, 16935468, 10501190 In astrocytes, BK induced expression of matrix metalloproteinase-9, phospholipase A2 and COX-2 and increased expression and secretion of IL-6.
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PMID: 17669557 LPS binds TLR4.
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PMID: 17669557, 17402969 BK receptors in microglia mediate anti-inflammatory or neuroprotective effects, namely the inhibition of LPS-induced release of TNF-¦Á and IL-1¦Â.
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PMID: 17669557, 17402969 BK receptors in microglia mediate anti-inflammatory or neuroprotective effects, namely the inhibition of LPS-induced release of TNF-¦Á and IL-1¦Â. PMID: 17669557 BK-induced attenuation of LPS-induced TNF-¦Á formation was suppressed by 10 ¦ÌM NS398, a cyclooxygenase-2 (COX-2) inhibitor, and 50 ¦ÌM RpcAMP, a membrane-permeable cAMP inhibitor.
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