Cell-penetrating peptdie based on peptide array technique inhibiting NR2B phosphorylation in inflammato-ry pain rats
10.3969/j.issn.1006-5725.2017.19.007
- VernacularTitle:基于多肽阵列技术构建的细胞穿膜肽靶向抑制炎性痛大鼠NR2B磷酸化
- Author:
Jianyu LI
1
;
Xiuhuan YANG
;
Jiahui MA
;
Jianhua LU
Author Information
1. 解放军421医院麻醉科
- Keywords:
peptide array technique;
inflammatory pain;
NR2B
- From:
The Journal of Practical Medicine
2017;33(19):3181-3185
- CountryChina
- Language:Chinese
-
Abstract:
Objective We used peptide array technique to construct a peptide FynP inhibiting the interac-tion between Fyn and PSD95 in vitro therefor with a potential for inbiting NR2B phosphorylation level(p-NR2B). This experiment was designed to examine whether FynP(deliverd with TAT-LK15)can inhibit interaction between Fyn and PSD95 in inflammatory pain rats,and therefore inhibit NR2B phosphorylationin in vivo. Methods TAT-LK15 was complexed with FynP(cell-penetrating peptide Tat-LK15/FynP)or scrambled control FynP(Tat-LK15/mFynP). Changes of p-NR2B were detected using western-blot in SCDH of chronic inflammatory pain rats following intraperitoneal injection of Tat-LK15/FynP,meanwhile,the effect of Tat-LK15/FynP on the interaction between Fyn and PSD-95 was tested by co-immunoprecipitation. Pain control efficacy was evaluated by changes of mechani-cal withdrawal threshold(MWT)and thermal withdrawal duration(TWL)in these rats. Results Interaction be-tween Fyn and PSD-95 was efficiently inhibited by intraperitoneal injection of TAT-LK15/FynP complexes while in-jection of FynP or TAT-LK15/mFynP complexes did not show this inhibitory effect. NR2B phosphorylation level was also inhibited by injection of TAT-LK15/FynP,and the changes of p-NR2B levels were reduced by 52%compared to chronic inflammatory pain rats without treatment. FynP or TAT-LK15/mFynP did not show this effect. Moreover, injection of TAT-LK15/FynP complexes significantly reduced MWT and increased TWL of chronic inflammatory pain rats accordingly. Conclusion FynP delivered by Tat-LK15 can perturb Fyn and PSD95 interaction and then inhibit NR2B phosphorylation activation therfor relieve chronic inflammatory pain.
