Modulation of neuronal activity by phosphorylation of the K-Cl cotransporter KCC2.

Modulation of neuronal activity by phosphorylation of the K-Cl cotransporter KCC2.
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DOI:
10.1016/j.tins.2013.08.006
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发表时间:
2013-12
影响因子:
15.9
通讯作者:
Moss SJ
Moss SJ
中科院分区:
医学1区
文献类型:
--
作者:
Kahle KT;Deeb TZ;Puskarjov M;Silayeva L;Liang B;Kaila K;Moss SJ

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K-Cl 协同转运蛋白 KCC2 建立了由离子型 g-氨基丁酸受体 (GABAAR) 和甘氨酸受体 (GlyR) 介导的超极化抑制性突触后电位所需的低神经元内 Cl− 水平。 KCC2 介导的 Cl− 挤出减少和超极化 GABAAR 和/或 GlyR 介导的电流受损与癫痫、神经性疼痛和痉挛有关。最近的证据表明,KCC2 的内在离子转运速率、细胞表面稳定性和质膜运输受到该蛋白 C 末端关键丝氨酸、苏氨酸和酪氨酸残基的(去)磷酸化的快速可逆调节。 KCC2 磷酸化的改变与多种神经系统疾病中 KCC2 功能受损有关。通过上游调节激酶直接或间接靶向 KCC2 磷酸化可能是调节 GABA 和/或甘氨酸信号传导以获得治疗益处的新策略。
The K–Cl cotransporter KCC2 establishes the low intraneuronal Cl− levels required for the hyperpolarizing inhibitory postsynaptic potentials mediated by ionotropic g-aminobutyric acid receptors (GABAARs) and glycine receptors (GlyRs). Decreased KCC2-mediated Cl− extrusion and impaired hyperpolarizing GABAAR- and/or GlyR-mediated currents have been implicated in epilepsy, neuropathic pain, and spasticity. Recent evidence suggests that the intrinsic ion transport rate, cell surface stability, and plasmalemmal trafficking of KCC2 are rapidly and reversibly modulated by the (de)phosphorylation of critical serine, threonine, and tyrosine residues in the C terminus of this protein. Alterations in KCC2 phosphorylation have been associated with impaired KCC2 function in several neurological diseases. Targeting KCC2 phosphorylation directly or indirectly via upstream regulatory kinases might be a novel strategy to modulate GABA- and/or glycinergic signaling for therapeutic benefit.
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