Controlling intraocular pressure (IOP) remains themainstay of glaucoma therapy. The trabecular meshwork (TM), the key tissue responsible for aqueous humor (AH) outflow and IOP maintenance, is very sensitive to mechanical forces. However, it is not understood whether Piezo channels, very sensitive mechanosensors, functionally influence AH outflow. Here, we characterize the role of Piezo1 in conventional AH outflow. Immunostaining and western blot analysis showed that Piezo1 is widely expressed by TM. Patch-clamp recordings in TM cells confirmed the activation of Piezo1-derived mechanosensitive currents. Importantly, the antagonist GsMTx4 for mechanosensitive channels significantly decreased steady-state facility, yet activation of Piezo1 by the specific agonist Yoda1 did not lead to a facility change. Furthermore, GsMTx4, but not Yoda1, caused a significant increase in ocular compliance, a measure of the eye's transient response to IOP perturbation. Our findings demonstrate a potential role for Piezo1 in conventional outflow, likely under pathological and rapid transient conditions.
基金:
National Key Research and Development Program 2018YFA0109500; National Natural
Science Foundation of China 81870653, 21807063, and 81730027; the Georgia Research Alliance; Shandong
Province Shandong Province National Science Foundation ZR2017BH007, China; and Shandong
Key Research and Development Program 2019GSF107075, China.
第一作者机构:[1]Qingdao Univ, Med Coll, Sch Pharm, Dept Pharmacol, 38 Dengzhou Rd, Qingdao 266021, Shandong, Peoples R China[2]Beihang Univ, Beijing Adv Innovat Ctr Big Data Based Precis Med, Beijing 100730, Peoples R China[3]Capital Med Univ, Beijing 100730, Peoples R China
共同第一作者:
通讯作者:
通讯机构:[1]Qingdao Univ, Med Coll, Sch Pharm, Dept Pharmacol, 38 Dengzhou Rd, Qingdao 266021, Shandong, Peoples R China[2]Beihang Univ, Beijing Adv Innovat Ctr Big Data Based Precis Med, Beijing 100730, Peoples R China[3]Capital Med Univ, Beijing 100730, Peoples R China[11]Qingdao Univ, Inst Innovat Drugs, 38 Dengzhou Rd, Qingdao 266021, Shandong, Peoples R China
推荐引用方式(GB/T 7714):
Zhu Wei,Hou Fei,Fang Jingwang,et al.The role of Piezo1 in conventional aqueous humor outflow dynamics[J].ISCIENCE.2021,24(2):doi:10.1016/j.isci.2021.102042.
APA:
Zhu, Wei,Hou, Fei,Fang, Jingwang,Fard, Mohammad Reza Bahrani,Liu, Yani...&Wang, KeWei.(2021).The role of Piezo1 in conventional aqueous humor outflow dynamics.ISCIENCE,24,(2)
MLA:
Zhu, Wei,et al."The role of Piezo1 in conventional aqueous humor outflow dynamics".ISCIENCE 24..2(2021)