A Library of Elastin-like Proteins with Tunable Matrix Ligands for In Vitro 3D Neural Cell Culture

被引:4
|
作者
Suhar, Riley A. [1 ]
Huang, Michelle S. [2 ,3 ]
Navarro, Renato S. [1 ]
Aviles Rodriguez, Giselle [1 ]
Heilshorn, Sarah C. [1 ]
机构
[1] Stanford Univ, Dept Mat Sci & Engn, Stanford, CA 94305 USA
[2] Stanford Univ, Dept Chem Engn, Stanford, CA 94305 USA
[3] Stanford Univ, Inst Chem, Engn & Med Human Hlth Sarafan ChEM H, Stanford, CA 94305 USA
基金
美国国家卫生研究院; 美国国家科学基金会;
关键词
ALTERNATIVELY SPLICED REGION; NEURITE OUTGROWTH; EXTRACELLULAR-MATRIX; TENASCIN-C; HYALURONIC-ACID; SENSORY NEURONS; RGD PEPTIDES; STEM-CELLS; HYDROGELS; FIBRONECTIN;
D O I
10.1021/acs.biomac.3c00941
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
Hydrogels with encapsulated cells have widespread biomedical applications, both as tissue-mimetic 3D cultures in vitro and as tissue-engineered therapies in vivo. Within these hydrogels, the presentation of cell-instructive extracellular matrix (ECM)-derived ligands and matrix stiffness are critical factors known to influence numerous cell behaviors. While individual ECM biopolymers can be blended together to alter the presentation of cell-instructive ligands, this typically results in hydrogels with a range of mechanical properties. Synthetic systems that allow for the facile incorporation and modulation of multiple ligands without modification of matrix mechanics are highly desirable. In the present work, we leverage protein engineering to design a family of xeno-free hydrogels (i.e., devoid of animal-derived components) consisting of recombinant hyaluronan and recombinant elastin-like proteins (ELPs), cross-linked together with dynamic covalent bonds. The ELP components incorporate cell-instructive peptide ligands derived from ECM proteins, including fibronectin (RGD), laminin (IKVAV and YIGSR), collagen (DGEA), and tenascin-C (PLAEIDGIELTY and VFDNFVL). By carefully designing the protein primary sequence, we form 3D hydrogels with defined and tunable concentrations of cell-instructive ligands that have similar matrix mechanics. Utilizing this system, we demonstrate that neurite outgrowth from encapsulated embryonic dorsal root ganglion (DRG) cultures is significantly modified by cell-instructive ligand content. Thus, this library of protein-engineered hydrogels is a cell-compatible system to systematically study cell responses to matrix-derived ligands.
引用
收藏
页码:5926 / 5939
页数:14
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