RRC ID 65115
Author Oyama TG, Oyama K, Kimura A, Yoshida F, Ishida R, Yamazaki M, Miyoshi H, Taguchi M.
Title Collagen hydrogels with controllable combined cues of elasticity and topography to regulate cellular processes.
Journal Biomed Mater
Abstract The elasticity, topography, and chemical composition of cell culture substrates influence cell behavior. However, the cellular responses toin vivoextracellular matrix (ECM), a hydrogel of proteins (mainly collagen) and polysaccharides, remain unknown as there is no substrate that preserves the key features of native ECM. This study introduces novel collagen hydrogels that can combine elasticity, topography, and composition and reproduce the correlation between collagen concentration (C) and elastic modulus (E) in native ECM. A simple reagent-free method based on radiation-cross-linking altered ECM-derived collagen I and hydrolyzed collagen (gelatin or collagen peptide) solutions into hydrogels with tunable elastic moduli covering a broad range of soft tissues (E= 1-236 kPa) originating from the final collagen density in the hydrogels (C= 0.3-14%) and precise microtopographies (≥1 μm). The amino acid composition ratio was almost unchanged by this method, and the obtained collagen hydrogels maintained enzyme-mediated degradability. These collagen hydrogels enabled investigation of the responses of cell lines (fibroblasts, epithelial cells, and myoblasts) and primary cells (rat cardiomyocytes) to soft topographic cues such as thosein vivounder the positive correlation betweenCandE. These cells adhered directly to the collagen hydrogels and chose to stay atop or spontaneously migrate into them depending onE, that is, the density of the collagen network,C. We revealed that the cell morphology and actin cytoskeleton organization conformed to the topographic cues, even when they are as soft asin vivoECM. The stiffer microgrooves on collagen hydrogels aligned cells more effectively, except HeLa cells that underwent drastic changes in cell morphology. These collagen hydrogels may not only reducein vivoandin vitrocell behavioral disparity but also facilitate artificial ECM design to control cell function and fate for applications in tissue engineering and regenerative medicine.
Volume 16(4)
Published 2021-6-11
DOI 10.1088/1748-605X/ac0452
PMID 34030146
MeSH Animals Biocompatible Materials* / chemistry Biocompatible Materials* / pharmacology Cell Physiological Phenomena / drug effects* Cells, Cultured Collagen* / chemistry Collagen* / pharmacology Dogs Elasticity / drug effects* Extracellular Matrix / chemistry Extracellular Matrix / drug effects Extracellular Matrix / metabolism HeLa Cells Humans Hydrogels* / chemistry Hydrogels* / pharmacology Madin Darby Canine Kidney Cells Rats Surface Properties
IF 3.174
Human and Animal Cells MDCK(RCB0995) HeLa(RCB0007) 3T3 Swiss Albino(RCB1642)