Studies of Inositol Phosphate Export from Neuronal Tissue In Vitro
Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extr...
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| Autor*in: |
Roberts, Richard E. [verfasserIn] Marsden, Charles A. [verfasserIn] Kendall, David A. [verfasserIn] |
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| Format: |
E-Artikel |
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| Erschienen: |
Oxford, UK: Blackwell Science Ltd ; 1997 |
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| Schlagwörter: |
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| Umfang: |
Online-Ressource |
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| Reproduktion: |
2002 ; Blackwell Publishing Journal Backfiles 1879-2005 |
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| Übergeordnetes Werk: |
In: Journal of neurochemistry - Oxford : Wiley-Blackwell, 1956, 69(1997), 3, Seite 0 |
| Übergeordnetes Werk: |
volume:69 ; year:1997 ; number:3 ; pages:0 |
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| DOI / URN: |
10.1046/j.1471-4159.1997.69031291.x |
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| 520 | |a Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. | ||
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10.1046/j.1471-4159.1997.69031291.x doi (DE-627)NLEJ243166567 DE-627 ger DE-627 rakwb Roberts, Richard E. verfasserin aut Studies of Inositol Phosphate Export from Neuronal Tissue In Vitro Oxford, UK Blackwell Science Ltd 1997 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. 2002 Blackwell Publishing Journal Backfiles 1879-2005 |2002|||||||||| Inositol phosphates Marsden, Charles A. verfasserin aut Kendall, David A. verfasserin aut In Journal of neurochemistry Oxford : Wiley-Blackwell, 1956 69(1997), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927584 (DE-600)2020528-4 1471-4159 nnns volume:69 year:1997 number:3 pages:0 http://dx.doi.org/10.1046/j.1471-4159.1997.69031291.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 69 1997 3 0 |
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10.1046/j.1471-4159.1997.69031291.x doi (DE-627)NLEJ243166567 DE-627 ger DE-627 rakwb Roberts, Richard E. verfasserin aut Studies of Inositol Phosphate Export from Neuronal Tissue In Vitro Oxford, UK Blackwell Science Ltd 1997 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. 2002 Blackwell Publishing Journal Backfiles 1879-2005 |2002|||||||||| Inositol phosphates Marsden, Charles A. verfasserin aut Kendall, David A. verfasserin aut In Journal of neurochemistry Oxford : Wiley-Blackwell, 1956 69(1997), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927584 (DE-600)2020528-4 1471-4159 nnns volume:69 year:1997 number:3 pages:0 http://dx.doi.org/10.1046/j.1471-4159.1997.69031291.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 69 1997 3 0 |
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10.1046/j.1471-4159.1997.69031291.x doi (DE-627)NLEJ243166567 DE-627 ger DE-627 rakwb Roberts, Richard E. verfasserin aut Studies of Inositol Phosphate Export from Neuronal Tissue In Vitro Oxford, UK Blackwell Science Ltd 1997 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. 2002 Blackwell Publishing Journal Backfiles 1879-2005 |2002|||||||||| Inositol phosphates Marsden, Charles A. verfasserin aut Kendall, David A. verfasserin aut In Journal of neurochemistry Oxford : Wiley-Blackwell, 1956 69(1997), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927584 (DE-600)2020528-4 1471-4159 nnns volume:69 year:1997 number:3 pages:0 http://dx.doi.org/10.1046/j.1471-4159.1997.69031291.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 69 1997 3 0 |
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10.1046/j.1471-4159.1997.69031291.x doi (DE-627)NLEJ243166567 DE-627 ger DE-627 rakwb Roberts, Richard E. verfasserin aut Studies of Inositol Phosphate Export from Neuronal Tissue In Vitro Oxford, UK Blackwell Science Ltd 1997 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. 2002 Blackwell Publishing Journal Backfiles 1879-2005 |2002|||||||||| Inositol phosphates Marsden, Charles A. verfasserin aut Kendall, David A. verfasserin aut In Journal of neurochemistry Oxford : Wiley-Blackwell, 1956 69(1997), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927584 (DE-600)2020528-4 1471-4159 nnns volume:69 year:1997 number:3 pages:0 http://dx.doi.org/10.1046/j.1471-4159.1997.69031291.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 69 1997 3 0 |
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10.1046/j.1471-4159.1997.69031291.x doi (DE-627)NLEJ243166567 DE-627 ger DE-627 rakwb Roberts, Richard E. verfasserin aut Studies of Inositol Phosphate Export from Neuronal Tissue In Vitro Oxford, UK Blackwell Science Ltd 1997 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. 2002 Blackwell Publishing Journal Backfiles 1879-2005 |2002|||||||||| Inositol phosphates Marsden, Charles A. verfasserin aut Kendall, David A. verfasserin aut In Journal of neurochemistry Oxford : Wiley-Blackwell, 1956 69(1997), 3, Seite 0 Online-Ressource (DE-627)NLEJ243927584 (DE-600)2020528-4 1471-4159 nnns volume:69 year:1997 number:3 pages:0 http://dx.doi.org/10.1046/j.1471-4159.1997.69031291.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 69 1997 3 0 |
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Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. |
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Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. |
| abstract_unstemmed |
Abstract: Recent in vivo microdialysis studies have demonstrated the presence of extracellular levels of inositol 1,4,5-trisphosphate [Ins(1,4,5)P3] that can be increased in a concentration-dependent manner by muscarinic receptor activation. The aim of the present study was to determine whether extracellular levels of Ins(1,4,5)P3 could be measured in vitro. Despite rapid increases in internal Ins(1,4,5)P3 levels after stimulation with 1 mM carbachol, there was no change in external levels in both rat brain cortical slices and human neuroblastoma SH-SY5Y cells. Suprafusion of myo-[3H]inositol-prelabelled hippocampal slices with 1 mM carbachol caused an increase in 3H-inositol phosphates over basal levels in the perfusate after 10 min, reaching a peak (223 ± 56% of basal) 20 min after suprafusion with carbachol was started. This response to carbachol was potentiated in the presence of 30 mM K+. Analysis of the individual 3H-inositol phosphates in the perfusate revealed that levels of [3H]inositol monophosphate, [3H]inositol bisphosphate, [3H]inositol trisphosphate, and [3H]inositol tetrakisphosphate were all significantly increased. A similar increase in extracellular 3H-inositol phosphates was demonstrated in SH-SY5Y cells incubated with 1 mM carbachol for 30 min. This response was again enhanced by 30 mM K+, although the intracellular response was not potentiated. Possible roles for extracellular inositol phosphates are discussed. |
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Studies of Inositol Phosphate Export from Neuronal Tissue In Vitro |
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Marsden, Charles A. Kendall, David A. |
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