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第43卷第5期 顾圣玮,顾 浩,马晴晴,等. 蛋白酶激活受体2经RhoA信号抑制人内皮祖细胞增殖、迁移功能[J].
2023年5月 南京医科大学学报(自然科学版),2023,43(5):655-662 ·661 ·
架重塑、运动黏附以及凋亡等过程 [20] 。本研究显 activated receptor 2[J]. J Neuroinflammation,2018,15
示,RhoA 是 PAR2 诱导 EPC 功能变化的重要通路。 (1):248
活化 PAR2 可上调 EPC 中 RhoA 表达,PAR2 抑制剂 [5] LIU H,LESSIEUR E M,SAADANE A,et al. Neutrophil
elastase contributes to the pathological vascular permea⁃
可取消该效应,特异性抑制RhoA 活性可逆转PAR2
bility characteristic of diabetic retinopathy[J]. Diabetolo⁃
激活诱导的 EPC 功能下调。作为细胞运动调节相
gia,2019,62(12):2365-2374
关的核心因子,Rho 家族参与细胞事件中的诸多环
[6] DAS K,PRASAD R,SINGH A,et al. Protease⁃activated
节,RhoA 通过其效应器 Rho 相关蛋白激酶,促肌动
receptor 2 promotes actomyosin dependent transforming
球蛋白收缩以参与细胞运动相关过程。研究表明, microvesicles generation from human breast cancer[J].
细胞增殖过程中 RhoA 表达下调,抑制肌动球蛋白 Mol Carcinog,2018,57(12):1707-1722
形成与收缩,进而促进与干/祖细胞增殖、分化相关 [7] SHU A,DU Q,CHEN J,et al. Catalpol ameliorates endo⁃
的 Yes 相关蛋白/含 PDZ 结合序列转录共激活子 thelial dysfunction and inflammation in diabetic nephrop⁃
athy via suppression of RAGE/RhoA/ROCK signaling
(Yes ⁃ associated protein/transcriptional co ⁃ activator
with PDZ binding motif,YAP/TAZ)核转位,细胞增殖 pathway[J]. Chem Biol Interact,2021,348:109625
[8] MEEKINS L C,ROSADO⁃ADAMES N,MADDALA R,et
能力增强 [21] ;而细胞运动过程中,除细胞前端板状
al. Corneal endothelial cell migration and proliferation en⁃
伪足提供动力外,下调的 RhoA 导致细胞后缘肌动
hanced by Rho kinase(ROCK)inhibitors in in vitro and
球蛋白收缩力减弱,有利于松散细胞与细胞以及细
in vivo models[J]. Invest Ophthalmol Vis Sci,2016,57
胞与基质间的连接,使其易向不同方向延伸 [22⁃23] 。 (15):6731-6738
本研究中RhoA表达受PAR2激活而上调,可能通过 [9] ASAHARA T,MUROHARA T,SULLIVAN A,et al. Isola⁃
调控肌动球蛋白的形成并增强其收缩,在增殖迁移 tion of putative progenitor endothelial cells for angiogene⁃
相关动力学事件中发挥作用。而另有研究发现, sis[J]. Science,1997,275(5302):964-967
RhoA还可通过调节肌动蛋白的再分布及组装、参与 [10] LEE N G,JEUNG I C,HEO S C,et al. Ischemia⁃induced
SDF⁃1诱导的细胞迁移 [24] ;本研究发现PAR2活化诱 Netrin⁃4 promotes neovascularization through endothelial
progenitor cell activation via Unc⁃5 Netrin receptor B[J].
导 SDF⁃1 下调,或可通过改变 RhoA 信号、参与 EPC
Faseb J,2020,34(1):1231-1246
迁移抑制过程。
[11] SUN H X,LI G J,DU Z H,et al. The relationship between
综上所述,本研究表明 PAR2 可通过上调 EPC
endothelial progenitor cells and pulmonary arterial hyper⁃
RhoA信号抑制细胞增殖、迁移功能,PAR2可能作为 tension in children with congenital heart disease[J].
EPC功能调控的重要靶标。鉴于EPC在内皮修复与 BMC Pediatr,2019,19(1):502
再生中的重要作用,研究结果为血管相关疾病的治疗 [12] HARPER R L,MAIOLO S,WARD R J,et al. BMPR2⁃ex⁃
提供了新思路。然而本研究仅在体外进行了相关探 pressing bone marrow⁃derived endothelial⁃like progenitor
索,仍存在不足,有待在体内进一步展开深入研究。 cells alleviate pulmonary arterial hypertension in vivo[J].
Respirology,2019,24(11):1095-1103
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