Fibronectin Peptide Modified Hydrogels Activate a Contractile Phenotype in Nucleus Pulposus Cells.

IF 2.6 3区 生物学 Q3 MATERIALS SCIENCE, BIOMATERIALS
Ananya Naha, John Sorensen, Santiago Lazarte, Sailesti Joshi, Tristan P Driscoll
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Abstract

Degenerative disc disease is strongly associated with low back pain, making it a leading cause of disability. With injury and age, cellular remodeling of the disc tissue leads to compositional changes, stiffening, and loss of stress relaxation, particularly in the central gelatinous nucleus pulposus (NP) region of the disc. As part of this extracellular matrix (ECM) remodeling, there is an increase in the deposition of fibronectin, a strongly adhesive integrin ligand that is known to regulate inflammatory signaling. However, it is unclear how these pathological changes in cellular adhesion regulate cell phenotype, and which domains of fibronectin are specifically involved. Here, a dextran vinyl sulfone (DexVS) hydrogel system is employed for presentation of specific fibronectin domains. Fibronectin peptides are found to enhance YAP signaling, inflammatory NF-κB signaling, cellular adhesion, and cellular contractility in NP cells, which leads to a decrease in aggrecan gene expression. Covalent modification of these DexVS hydrogels with bioactive peptides allows for targeted interactions with specific integrin receptors that are involved in healthy or degenerative signaling. In doing so, the integrin binding peptides from fibronectin are identified to activate a contractile phenotype in NP cells.

纤维连接蛋白肽修饰的水凝胶激活髓核细胞的收缩表型。
椎间盘退行性疾病与腰痛密切相关,使其成为致残的主要原因。随着损伤和年龄的增长,椎间盘组织的细胞重塑导致成分改变、变硬和应力松弛丧失,特别是在椎间盘的中央胶状髓核(NP)区域。作为细胞外基质(ECM)重塑的一部分,纤维连接蛋白的沉积增加,纤维连接蛋白是一种强粘附的整合素配体,已知可调节炎症信号。然而,目前尚不清楚细胞粘附的这些病理变化是如何调节细胞表型的,以及纤维连接蛋白的哪些结构域具体参与其中。在这里,葡聚糖乙烯基砜(DexVS)水凝胶系统被用于呈现特定的纤维连接蛋白结构域。研究发现,纤连蛋白肽可增强NP细胞中的YAP信号、炎性NF-κB信号、细胞粘附和细胞收缩性,从而导致聚集蛋白基因表达降低。这些DexVS水凝胶与生物活性肽的共价修饰允许与参与健康或退行性信号传导的特定整合素受体进行靶向相互作用。在此过程中,纤维连接蛋白的整合素结合肽被鉴定为激活NP细胞的收缩表型。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Advanced biology
Advanced biology Biochemistry, Genetics and Molecular Biology-Biochemistry, Genetics and Molecular Biology (all)
CiteScore
6.60
自引率
0.00%
发文量
130
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