代谢型谷氨酸受体

代谢型谷氨酸受体（英语：metabotropic glutamate receptors，简称mGluR），属于谷氨酸受体的一种类型（另一类为离子型谷氨酸受体），可借由间接代谢过程进行激活。该受体是GPCR家族C组的成员^[2]。就像所有谷氨酸盐受体，该受体会与谷氨酸结合，是一种具有兴奋性神经传递物质的氨基酸。

功能与结构[编辑]

在中枢和周围神经系统中，mGluR执行许多种功能：比如涉及学习、记忆、焦虑以及疼痛的感知^[3]。它们在脑的海马体、小脑^[4]大脑皮质等其他组织及周围组织^[5]神经突触的突触前和突触后神经元都有发现。

如同其它的代谢型受体，mGluRs也有一个七跨膜结构域跨过细胞膜^[6]，但不像离子型受体，mGluRs并没有离子通道的作用，而是通过生化级联反应来使其它蛋白（如离子通道）变构^[7]，从而改变突触的兴奋性。比如神经传递（英语：neurotransmission）的突触前抑制^[8]和突触后反应的调节甚至诱导^[2]^[5]^[6]^[9]。

mGluRs的二聚化（英语：GPCR oligomer）需要激动剂的信号介导。^[10]

分类[编辑]

八种不同的mGluR（mGluR₁到mGluR₈，基因为GRM1-GRM8）由其结构和生理活性^[3]可分为I-III三个类型^[2]^[4]^[5]^[9]。mGluR还可以进一步分为亚型，如mGluR_7a和mGluR_7b。

概览[编辑]

代谢型谷氨酸受体概览
	受体 ^[11]^[12]	基因	机制^[11]	功能	激动剂和激活剂	拮抗剂	突触分布
I型	mGluR₁	GRM1（英语：GRM1）	G_q（英语：Gq alpha subunit）, ↑Na⁺,^[5] ↑K⁺,^[5] ↓谷氨酸^[9]	增加^[13]^[14]N-甲基-D-天冬氨酸受体活性和兴奋性中毒（英语：excitotoxicity）风险	3,5-dihydroxyphenylglycine（英语：3,5-dihydroxyphenylglycine）		突触后为主^[15]
I型	mGluR₅	GRM5（英语：GRM5）	G_q（英语：Gq alpha subunit）, ↑Na⁺,^[5] ↑K⁺,^[5] ↓谷氨酸^[9]	增加^[13]^[14]N-甲基-D-天冬氨酸受体活性和兴奋性中毒（英语：excitotoxicity）风险	3,5-dihydroxyphenylglycine（英语：3,5-dihydroxyphenylglycine）		突触后为主^[15]
II型	mGluR₂	GRM2（英语：GRM2）	G_i/G₀（英语：GiG0 alpha subunits）	降低^[16]N-甲基-D-天冬氨酸受体活性和兴奋性中毒（英语：excitotoxicity）风险 Attenuate schizophrenia	eglumegad（英语：eglumegad） Biphenylindanone A（英语：Biphenylindanone A） DCG-IV（英语：DCG-IV）	APICA（英语：APICA (drug)） EGLU LY-341,495（英语：LY-341,495）	突触前为主^[15]
II型	mGluR₃	GRM3（英语：GRM3）	G_i/G₀（英语：GiG0 alpha subunits）			APICA（英语：APICA (drug)） EGLU LY-341,495（英语：LY-341,495）	突触前为主^[15]
III型	mGluR₄	GRM4（英语：GRM4）	G_i/G₀（英语：GiG0 alpha subunits）	降低^[16]N-甲基-D-天冬氨酸受体活性和兴奋性中毒（英语：excitotoxicity）风险	L-AP4（英语：2-amino-4-phosphonobutyrate）		突触前为主^[15]
	mGluR₆	GRM6（英语：GRM6）	G_i/G₀（英语：GiG0 alpha subunits）
	mGluR₇	GRM7（英语：GRM7）	G_i/G₀（英语：GiG0 alpha subunits）
	mGluR₈	GRM8（英语：GRM8）	G_i/G₀（英语：GiG0 alpha subunits）

参考文献[编辑]

^ Kammermeier PJ. Surface clustering of metabotropic glutamate receptor 1 induced by long Homer proteins. BMC Neurosci. 2006, 7: 1 [2014-04-27]. PMC 1361788 . PMID 16393337. doi:10.1186/1471-2202-7-1. （原始内容存档于2015-09-23）.
^ ^2.0 ^2.1 ^2.2 Bonsi P, Cuomo D, De Persis C, Centonze D, Bernardi G, Calabresi P, Pisani A. Modulatory action of metabotropic glutamate receptor (mGluR) 5 on mGluR1 function in striatal cholinergic interneurons. Neuropharmacology. 49. 2005,. Suppl 1: 104–13. PMID 16005029. doi:10.1016/j.neuropharm.2005.05.012.
^ ^3.0 ^3.1 Ohashi H, Maruyama T, Higashi-Matsumoto H, Nomoto T, Nishimura S, Takeuchi Y. A novel binding assay for metabotropic glutamate receptors using [3H] L-quisqualic acid and recombinant receptors (subscription required). Z. Naturforsch., C, J. Biosci. 2002, 57 (3-4): 348–55 [2014-04-28]. PMID 12064739. （原始内容存档 (PDF)于2005-10-27）.
^ ^4.0 ^4.1 Hinoi E, Ogita K, Takeuchi Y, Ohashi H, Maruyama T, Yoneda Y. Characterization with [3H]quisqualate of group I metabotropic glutamate receptor subtype in rat central and peripheral excitable tissues. Neurochem. Int. 2001, 38 (3): 277–85. PMID 11099787. doi:10.1016/S0197-0186(00)00075-9.
^ ^5.0 ^5.1 ^5.2 ^5.3 ^5.4 ^5.5 ^5.6 Chu Z, Hablitz JJ. Quisqualate induces an inward current via mGluR activation in neocortical pyramidal neurons. Brain Res. 2000, 879 (1-2): 88–92. PMID 11011009. doi:10.1016/S0006-8993(00)02752-9.
^ ^6.0 ^6.1 Platt SR. The role of glutamate in central nervous system health and disease--a review. Vet. J. 2007, 173 (2): 278–86. PMID 16376594. doi:10.1016/j.tvjl.2005.11.007.
^ Gabriel L, Lvov A, Orthodoxou D, Rittenhouse A, Kobertz W, Melikian H. The Acid-sensitive, Anesthetic-activated Potassium Leak Channel, KCNK3, Is Regulated by 14-3-3β-dependent, Protein Kinase C (PKC)-mediated Endocytic Trafficking. JBC. 2012, 287 (39): 32354–32366. PMID 22846993. doi:10.1074/jbc.M112.391458.
^ Sladeczek F., Momiyama A.,Takahashi T. (1992). "Presynaptic inhibitory action of metabotropic glutamate receptor agonist on excitatory transmission in visual cortical neurons". Proc. Roy. Soc. Lond. B 1993 253, 297-303.
^ ^9.0 ^9.1 ^9.2 ^9.3 Endoh T. Characterization of modulatory effects of postsynaptic metabotropic glutamate receptors on calcium currents in rat nucleus tractus solitarius. Brain Res. 2004, 1024 (1-2): 212–24. PMID 15451384. doi:10.1016/j.brainres.2004.07.074.
^ El Moustaine D; Granier S; Doumazane E; et al. Distinct roles of metabotropic glutamate receptor dimerization in agonist activation and G-protein coupling. Proc. Natl. Acad. Sci. U.S.A. 2012, 109 (40): 16342–7. PMC 3479612 . PMID 22988116. doi:10.1073/pnas.1205838109.
^ ^11.0 ^11.1 If not otherwise specified in table:TABLE 1 Classification of the metabotropic glutamate (mGlu) receptors （页面存档备份，存于互联网档案馆） From the following article:
^ Swanson CJ, Bures M, Johnson MP, Linden AM, Monn JA, Schoepp DD. Metabotropic glutamate receptors as novel targets for anxiety and stress disorders. Nature Reviews Drug Discovery. 2005, 4 (2): 131–44. PMID 15665858. doi:10.1038/nrd1630.
^ Skeberdis VA, Lan J, Opitz T, Zheng X, Bennett MV, Zukin RS. mGluR1-mediated potentiation of NMDA receptors involves a rise in intracellular calcium and activation of protein kinase C. Neuropharmacology. 2001, 40 (7): 856–65. PMID 11378156. doi:10.1016/S0028-3908(01)00005-3.
^ Lea PM, Custer SJ, Vicini S, Faden AI. Neuronal and glial mGluR5 modulation prevents stretch-induced enhancement of NMDA receptor current. Pharmacol. Biochem. Behav. 2002, 73 (2): 287–98. PMID 12117582. doi:10.1016/S0091-3057(02)00825-0.
^ ^15.0 ^15.1 ^15.2 Shigemoto R, Kinoshita A, Wada E, Nomura S, Ohishi H, Takada M, Flor PJ, Neki A, Abe T, Nakanishi S, Mizuno N. Differential presynaptic localization of metabotropic glutamate receptor subtypes in the rat hippocampus (abstract). J. Neurosci. 1997, 17 (19): 7503–22 [2014-04-28]. PMID 9295396. （原始内容存档于2008-07-05）.
^ ^16.0 ^16.1 Ambrosini A, Bresciani L, Fracchia S, Brunello N, Racagni G. Metabotropic glutamate receptors negatively coupled to adenylate cyclase inhibit N-methyl-D-aspartate receptor activity and prevent neurotoxicity in mesencephalic neurons in vitro (abstract). Mol. Pharmacol. 1995, 47 (5): 1057–64 [2014-04-28]. PMID 7746273. （原始内容存档于2008-08-28）.

外部链接[编辑]

医学主题词表（MeSH）：Metabotropic+Glutamate+Receptors

[Kammermeier06-1] Kammermeier PJ. Surface clustering of metabotropic glutamate receptor 1 induced by long Homer proteins. BMC Neurosci. 2006, 7: 1 [2014-04-27]. PMC 1361788 . PMID 16393337. doi:10.1186/1471-2202-7-1. （原始内容存档于2015-09-23）.

[Bonsi-2] 2.0 ^2.1 ^2.2 Bonsi P, Cuomo D, De Persis C, Centonze D, Bernardi G, Calabresi P, Pisani A. Modulatory action of metabotropic glutamate receptor (mGluR) 5 on mGluR1 function in striatal cholinergic interneurons. Neuropharmacology. 49. 2005,. Suppl 1: 104–13. PMID 16005029. doi:10.1016/j.neuropharm.2005.05.012.

[Ohashi-3] 3.0 ^3.1 Ohashi H, Maruyama T, Higashi-Matsumoto H, Nomoto T, Nishimura S, Takeuchi Y. A novel binding assay for metabotropic glutamate receptors using [3H] L-quisqualic acid and recombinant receptors (subscription required). Z. Naturforsch., C, J. Biosci. 2002, 57 (3-4): 348–55 [2014-04-28]. PMID 12064739. （原始内容存档 (PDF)于2005-10-27）.

[Hinoi-4] 4.0 ^4.1 Hinoi E, Ogita K, Takeuchi Y, Ohashi H, Maruyama T, Yoneda Y. Characterization with [3H]quisqualate of group I metabotropic glutamate receptor subtype in rat central and peripheral excitable tissues. Neurochem. Int. 2001, 38 (3): 277–85. PMID 11099787. doi:10.1016/S0197-0186(00)00075-9.

[Chu_and_Hablitz-5] 5.0 ^5.1 ^5.2 ^5.3 ^5.4 ^5.5 ^5.6 Chu Z, Hablitz JJ. Quisqualate induces an inward current via mGluR activation in neocortical pyramidal neurons. Brain Res. 2000, 879 (1-2): 88–92. PMID 11011009. doi:10.1016/S0006-8993(00)02752-9.

[Platt-6] 6.0 ^6.1 Platt SR. The role of glutamate in central nervous system health and disease--a review. Vet. J. 2007, 173 (2): 278–86. PMID 16376594. doi:10.1016/j.tvjl.2005.11.007.

[Gabriel-7] Gabriel L, Lvov A, Orthodoxou D, Rittenhouse A, Kobertz W, Melikian H. The Acid-sensitive, Anesthetic-activated Potassium Leak Channel, KCNK3, Is Regulated by 14-3-3β-dependent, Protein Kinase C (PKC)-mediated Endocytic Trafficking. JBC. 2012, 287 (39): 32354–32366. PMID 22846993. doi:10.1074/jbc.M112.391458.

[8] Sladeczek F., Momiyama A.,Takahashi T. (1992). "Presynaptic inhibitory action of metabotropic glutamate receptor agonist on excitatory transmission in visual cortical neurons". Proc. Roy. Soc. Lond. B 1993 253, 297-303.

[Endoh-9] 9.0 ^9.1 ^9.2 ^9.3 Endoh T. Characterization of modulatory effects of postsynaptic metabotropic glutamate receptors on calcium currents in rat nucleus tractus solitarius. Brain Res. 2004, 1024 (1-2): 212–24. PMID 15451384. doi:10.1016/j.brainres.2004.07.074.

[pmid22988116-10] El Moustaine D; Granier S; Doumazane E; et al. Distinct roles of metabotropic glutamate receptor dimerization in agonist activation and G-protein coupling. Proc. Natl. Acad. Sci. U.S.A. 2012, 109 (40): 16342–7. PMC 3479612 . PMID 22988116. doi:10.1073/pnas.1205838109.

[nature-11] 11.0 ^11.1 If not otherwise specified in table:TABLE 1 Classification of the metabotropic glutamate (mGlu) receptors （页面存档备份，存于互联网档案馆） From the following article:

[pmid15665858-12] Swanson CJ, Bures M, Johnson MP, Linden AM, Monn JA, Schoepp DD. Metabotropic glutamate receptors as novel targets for anxiety and stress disorders. Nature Reviews Drug Discovery. 2005, 4 (2): 131–44. PMID 15665858. doi:10.1038/nrd1630.

[pmid11378156-13] Skeberdis VA, Lan J, Opitz T, Zheng X, Bennett MV, Zukin RS. mGluR1-mediated potentiation of NMDA receptors involves a rise in intracellular calcium and activation of protein kinase C. Neuropharmacology. 2001, 40 (7): 856–65. PMID 11378156. doi:10.1016/S0028-3908(01)00005-3.

[pmid12117582-14] Lea PM, Custer SJ, Vicini S, Faden AI. Neuronal and glial mGluR5 modulation prevents stretch-induced enhancement of NMDA receptor current. Pharmacol. Biochem. Behav. 2002, 73 (2): 287–98. PMID 12117582. doi:10.1016/S0091-3057(02)00825-0.

[Shigemoto-15] 15.0 ^15.1 ^15.2 Shigemoto R, Kinoshita A, Wada E, Nomura S, Ohishi H, Takada M, Flor PJ, Neki A, Abe T, Nakanishi S, Mizuno N. Differential presynaptic localization of metabotropic glutamate receptor subtypes in the rat hippocampus (abstract). J. Neurosci. 1997, 17 (19): 7503–22 [2014-04-28]. PMID 9295396. （原始内容存档于2008-07-05）.

[Ambrosini-16] 16.0 ^16.1 Ambrosini A, Bresciani L, Fracchia S, Brunello N, Racagni G. Metabotropic glutamate receptors negatively coupled to adenylate cyclase inhibit N-methyl-D-aspartate receptor activity and prevent neurotoxicity in mesencephalic neurons in vitro (abstract). Mol. Pharmacol. 1995, 47 (5): 1057–64 [2014-04-28]. PMID 7746273. （原始内容存档于2008-08-28）.

[1]

[2]

[3]

[4]

[5]

[6]

[7]

[8]

[9]

[10]

[11]

[12]

[13]

[14]

[15]

[16]