Prokineticin 2 suppresses GABA-activated current in rat primary sensory neurons
Prokineticin 2 suppresses GABA-activated current in rat primary sensory neurons
复制标题
Prokineticin 2 抑制大鼠初级感觉神经元中 GABA 激活的电流
DOI:
10.1016/j.neuropharm.2010.08.014
复制
发表时间:
2010-12
影响因子:
4.7
通讯作者:
Hu, Wang-Ping
中科院分区:
文献类型:
--
作者:
Xiong, Yan-Cai;Li, Xue-Mei;Wang, Xue-Jing;Liu, Yu-Qiang;Qiu, Fang;Wu, Dan;Can, Yun-Bo;Wang, Bang-Hua;Hu, Wang-Ping
Prokineticin 2 (PK2) is a newly identified regulatory protein, which is involved in a wide range of physiological processes including pain perception in mammals. However, the precise role of PK2 in nociception is yet not fully understood. Here, we investigate the effects of PK2 on GABAAreceptor function in rat trigeminal ganglion neurons using whole-cell patch clamp technique. PK2 reversibly depressed inward currents produced by GABAAreceptor activation (IGABA) with an IC50of 0.26 ± 0.02 nM. PK2 appeared to decrease the efficacy of GABA to GABAAreceptor but not the affinity. The maximum response of the GABA dose–response curve decreased to 71.2 ± 7.0% of control after pretreatment with PK2, while the threshold value and EC50of curve did not alter significantly. The effects of PK2 on IGABAwere voltage independent. The PK2-induced inhibition of IGABAwas removed by intracellular dialysis of either GDP-β-S (a non-hydrolyzable GDP analog), EGTA (a Ca2+chelator) or GF109203X (a selective protein kinase C inhibitor), but not by H89 (a protein kinase A inhibitor). These results suggest that PK2 down-regulates the function of the GABAAreceptor via G-protein and protein kinase C dependent signal pathways in primary sensory neurons and this depression might underlie the hyperalgesia induced by PK2.
登录
查看更多内容
影响因子:
3.6
作者:
N. Leidenheimer;S. McQuilkin;L. Hahner;P. Whiting;R. Harris
通讯作者:
N. Leidenheimer;S. McQuilkin;L. Hahner;P. Whiting;R. Harris
影响因子:
29.4
作者:
Ming Li;C. Bullock;F. Ehlert;Q. Zhou
通讯作者:
Ming Li;C. Bullock;F. Ehlert;Q. Zhou
影响因子:
5.5
作者:
GALLAGHER, JP;HIGASHI, H;NISHI, S
通讯作者:
NISHI, S
影响因子:
7.3
作者:
Negri, L;Lattanzi, R;Melchiorri, P
通讯作者:
Melchiorri, P
影响因子:
6.7
作者:
R. A. Levy
通讯作者:
R. A. Levy