Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model
The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors...
Ausführliche Beschreibung
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| Autor*in: |
Yamamoto, Tatsuo [verfasserIn] Hirasawa, Serabi [verfasserIn] Wroblewska, Barbara [verfasserIn] |
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| Format: |
E-Artikel |
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| Erschienen: |
Oxford, UK: Blackwell Science Ltd ; 2004 |
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| Schlagwörter: |
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| Umfang: |
Online-Ressource |
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| Reproduktion: |
2004 ; Blackwell Publishing Journal Backfiles 1879-2005 |
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| Übergeordnetes Werk: |
In: European journal of neuroscience - Oxford [u.a.] : Blackwell, 1989, 20(2004), 2, Seite 0 |
| Übergeordnetes Werk: |
volume:20 ; year:2004 ; number:2 ; pages:0 |
| Links: |
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| DOI / URN: |
10.1111/j.1460-9568.2004.03504.x |
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NLEJ242416713 |
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| 245 | 1 | 0 | |a Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model |
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| 520 | |a The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. | ||
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| 700 | 1 | |a Zhou, Jia |4 oth | |
| 700 | 1 | |a Kozikowski, Alan |4 oth | |
| 700 | 1 | |a Wroblewski, Jarda |4 oth | |
| 700 | 1 | |a Neale, Joseph H. |4 oth | |
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10.1111/j.1460-9568.2004.03504.x doi (DE-627)NLEJ242416713 DE-627 ger DE-627 rakwb Yamamoto, Tatsuo verfasserin aut Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model Oxford, UK Blackwell Science Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| Fos Hirasawa, Serabi verfasserin aut Wroblewska, Barbara verfasserin aut Grajkowska, Ewa oth Zhou, Jia oth Kozikowski, Alan oth Wroblewski, Jarda oth Neale, Joseph H. oth In European journal of neuroscience Oxford [u.a.] : Blackwell, 1989 20(2004), 2, Seite 0 Online-Ressource (DE-627)NLEJ243926383 (DE-600)2005178-5 1460-9568 nnns volume:20 year:2004 number:2 pages:0 http://dx.doi.org/10.1111/j.1460-9568.2004.03504.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 20 2004 2 0 |
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10.1111/j.1460-9568.2004.03504.x doi (DE-627)NLEJ242416713 DE-627 ger DE-627 rakwb Yamamoto, Tatsuo verfasserin aut Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model Oxford, UK Blackwell Science Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| Fos Hirasawa, Serabi verfasserin aut Wroblewska, Barbara verfasserin aut Grajkowska, Ewa oth Zhou, Jia oth Kozikowski, Alan oth Wroblewski, Jarda oth Neale, Joseph H. oth In European journal of neuroscience Oxford [u.a.] : Blackwell, 1989 20(2004), 2, Seite 0 Online-Ressource (DE-627)NLEJ243926383 (DE-600)2005178-5 1460-9568 nnns volume:20 year:2004 number:2 pages:0 http://dx.doi.org/10.1111/j.1460-9568.2004.03504.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 20 2004 2 0 |
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10.1111/j.1460-9568.2004.03504.x doi (DE-627)NLEJ242416713 DE-627 ger DE-627 rakwb Yamamoto, Tatsuo verfasserin aut Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model Oxford, UK Blackwell Science Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| Fos Hirasawa, Serabi verfasserin aut Wroblewska, Barbara verfasserin aut Grajkowska, Ewa oth Zhou, Jia oth Kozikowski, Alan oth Wroblewski, Jarda oth Neale, Joseph H. oth In European journal of neuroscience Oxford [u.a.] : Blackwell, 1989 20(2004), 2, Seite 0 Online-Ressource (DE-627)NLEJ243926383 (DE-600)2005178-5 1460-9568 nnns volume:20 year:2004 number:2 pages:0 http://dx.doi.org/10.1111/j.1460-9568.2004.03504.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 20 2004 2 0 |
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10.1111/j.1460-9568.2004.03504.x doi (DE-627)NLEJ242416713 DE-627 ger DE-627 rakwb Yamamoto, Tatsuo verfasserin aut Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model Oxford, UK Blackwell Science Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| Fos Hirasawa, Serabi verfasserin aut Wroblewska, Barbara verfasserin aut Grajkowska, Ewa oth Zhou, Jia oth Kozikowski, Alan oth Wroblewski, Jarda oth Neale, Joseph H. oth In European journal of neuroscience Oxford [u.a.] : Blackwell, 1989 20(2004), 2, Seite 0 Online-Ressource (DE-627)NLEJ243926383 (DE-600)2005178-5 1460-9568 nnns volume:20 year:2004 number:2 pages:0 http://dx.doi.org/10.1111/j.1460-9568.2004.03504.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 20 2004 2 0 |
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10.1111/j.1460-9568.2004.03504.x doi (DE-627)NLEJ242416713 DE-627 ger DE-627 rakwb Yamamoto, Tatsuo verfasserin aut Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model Oxford, UK Blackwell Science Ltd 2004 Online-Ressource nicht spezifiziert zzz rdacontent nicht spezifiziert z rdamedia nicht spezifiziert zu rdacarrier The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. 2004 Blackwell Publishing Journal Backfiles 1879-2005 |2004|||||||||| Fos Hirasawa, Serabi verfasserin aut Wroblewska, Barbara verfasserin aut Grajkowska, Ewa oth Zhou, Jia oth Kozikowski, Alan oth Wroblewski, Jarda oth Neale, Joseph H. oth In European journal of neuroscience Oxford [u.a.] : Blackwell, 1989 20(2004), 2, Seite 0 Online-Ressource (DE-627)NLEJ243926383 (DE-600)2005178-5 1460-9568 nnns volume:20 year:2004 number:2 pages:0 http://dx.doi.org/10.1111/j.1460-9568.2004.03504.x text/html Verlag Deutschlandweit zugänglich Volltext GBV_USEFLAG_U ZDB-1-DJB GBV_NL_ARTICLE AR 20 2004 2 0 |
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antinociceptive effects of n-acetylaspartylglutamate (naag) peptidase inhibitors zj-11, zj-17 and zj-43 in the rat formalin test and in the rat neuropathic pain model |
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Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model |
| abstract |
The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. |
| abstractGer |
The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. |
| abstract_unstemmed |
The peptide neurotransmitter N-acetylaspartylglutamate (NAAG) acts as an agonist at group II metabotropic glutamate receptors (mGluRs). NAAG is inactivated by extracellular peptidase activity yielding glutamate and N-acetylaspartate. We recently developed a series of potent NAAG peptidase inhibitors, including ZJ-11, ZJ-17 and ZJ-43. In the present study, we examined the effects of intrathecally administered ZJ-11 and ZJ-17 and intravenously administered ZJ-11 and ZJ-43 in the rat formalin test (an inflammatory pain model) and in the rat partial sciatic nerve ligation model (a neuropathic pain model). Intrathecal injection of ZJ-11 or ZJ-17 or intravenous injection of ZJ-11 or ZJ-43 suppressed both phases of the agitation behaviour induced by paw formalin injection. Intrathecal and intravenous injection of ZJ-11 suppressed the expression of Fos-like immunoreactivity, induced by paw formalin injection, in laminae I–II in segments L4–L5 of the spinal cord, suggesting an action on sensory spinal transmission. Partial sciatic nerve ligation induced significant mechanical allodynia 7 days after the nerve injury. Intrathecal injection of ZJ-11 or ZJ-17 or intravenous administration of ZJ-11 or ZJ-43 attenuated the level of mechanical allodynia induced by this nerve ligation. These effects of intrathecally or intravenously administered ZJ compounds in both the formalin test and the partial sciatic nerve ligation model were completely antagonized by pretreatment with LY-341495, a highly selective group II mGluR antagonist. Thus, elevation of extracellular NAAG, induced by the inhibition of NAAG peptidase, activates group II mGluRs and produces an analgesic effect in neuropathic and inflammatory and pain models. In contrast, peptidase inhibition did not affect the threshold for withdrawal from a noxious mechanical stimulus or from an acute thermal stimulus in the hotplate test. |
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Antinociceptive effects of N-acetylaspartylglutamate (NAAG) peptidase inhibitors ZJ-11, ZJ-17 and ZJ-43 in the rat formalin test and in the rat neuropathic pain model |
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