Gong Yi, Yin Jia-Yang, Tong Bo-Ding, Zeng Jie-Xi, Xiong Wei
Department of Minimal Invasive Surgery, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.
Department of Ophthalmology and Eye Research Center, The Second Xiangya Hospital, Central South University, Changsha, Hunan 410011, China.
Oncotarget. 2017 Oct 9;8(62):105126-105136. doi: 10.18632/oncotarget.21757. eCollection 2017 Dec 1.
Anti-fibrotic therapeutic methods with safety and efficiency after glaucoma filtration surgery (GFS) are desirable. In our previous study, by using Human Tenon's Fibroblasts (HTFs) as a model, we proved the expression of peroxisome proliferator activates receptor-γ (PPAR-γ) in HTFs; in addition, rosiglitazone (RSG), an agonist of PPAR-γ, can inhibit transforming growth factorsβ1 (TGF-β1)-induced reactivation of HTFs, thus to inhibit specifically scarring after GFS through intervening TGF-β/Smads signal pathway. However, a better drug delivery way of RSG, to prolong the duration of its function, and to reduce the toxicity of RSG to ocular tissue still remains challenges. Low density lipoprotein receptor (LDLr) is strongly expressed in hyper-proliferation HTFs after GFS. Therefore, we structured targeting LDL-RSG complexes and channel them into HTFs through LDL-LDLr pathway in order to promote anti-proliferation of HTFs and reduce the toxicity to ocular tissue. Meanwhile, in order to improve the release properties of LDL-RSG complexes, we structured slow release system of LDL-RSG/chitosan-calcium alginate - nanoparticles (CSNP), which effectively inhibited TGF-β1-induced HTFs proliferation, synthesis of extracellular matrix and activation of TGF-β1/SMAD pathway. These data suggested that LDL-RSG/CSNP can be a new anti-fibrotic therapeutic method on scarring after GFS and also a novelty administration of RSG.
青光眼滤过术后(GFS)具有安全性和有效性的抗纤维化治疗方法是人们所期望的。在我们之前的研究中,以人Tenon成纤维细胞(HTFs)为模型,我们证明了过氧化物酶体增殖物激活受体-γ(PPAR-γ)在HTFs中的表达;此外,PPAR-γ激动剂罗格列酮(RSG)可抑制转化生长因子β1(TGF-β1)诱导的HTFs重新激活,从而通过干预TGF-β/Smads信号通路特异性抑制GFS后的瘢痕形成。然而,RSG更好的给药方式,以延长其功能持续时间,并降低RSG对眼组织的毒性,仍然是挑战。低密度脂蛋白受体(LDLr)在GFS后过度增殖的HTFs中强烈表达。因此,我们构建了靶向LDL-RSG复合物,并通过LDL-LDLr途径将其导入HTFs,以促进HTFs的抗增殖并降低对眼组织的毒性。同时,为了改善LDL-RSG复合物的释放特性,我们构建了LDL-RSG/壳聚糖-海藻酸钙纳米粒(CSNP)缓释系统,其有效抑制了TGF-β1诱导的HTFs增殖、细胞外基质合成及TGF-β1/SMAD途径的激活。这些数据表明,LDL-RSG/CSNP可以成为一种治疗GFS后瘢痕形成的新型抗纤维化治疗方法,也是RSG的一种新型给药方式。