Combinational effects of mechanical forces and substrate surface characteristics on esophageal epithelial differentiation

Journal of Biomedical Materials Research - Part A - Tập 107 Số 3 - Trang 552-560 - 2019
Yanru Wu1, Yun Gyeong Kang2, Hanna Cho3, In Gul Kim3, Eun‐Jae Chung3, Jung‐Woog Shin4,2,1
1Department of Health Science and Technology, Inje University, Gimhae, Republic of Korea
2Department of Biomedical Engineering, Inje University, Gimhae, Republic of Korea
3Department of Otorhinolaryngology-Head and Neck Surgery, Seoul National University Hospital, Seoul, Republic of Korea
4Cardiovascular and Metabolic Disease Center/Institute of Aged Life Redesign/UHARC, Inje University, Gimhae, Republic of Korea

Tóm tắt

AbstractEven the efficacy of substrate and mechanical stimuli in addition to biochemical cues have been recognized in many studies of stem cell differentiation, few studies have been reported on the differentiation into esophageal epithelial cells. Therefore, the aim of this study was set to propose a method of differentiating stem cells into esophageal epithelial cells according to biochemical reagent concentration, substrate properties, and mechanical forces. After the concentration of all‐trans retinoic acid was determined as 5 μM by a baseline experiment, the degree of differentiation was compared in three different kinds of substrates: cover glass, polyurethane (PU) membrane, and electrospun PU sheet (ePU). Then, on the substrate showing the more positive results, that is, ePU, two types of mechanical forces, intermittent hydrostatic pressure (IHP), and shear stress (SS), were applied individually at different magnitudes for the latter 7 days of an overall incubation period of 14 days. Following various biological assays, the lower IHP (50 mmHg) resulted in greater positive effects than the others. Even with cessation of the mechanical force, the relevant markers were remarkably increased. Although the range of factors regulating differentiation was limited, this study nonetheless demonstrated the combinational effects of mechanical force along with substrate type for the first time in related studies. © 2018 Wiley Periodicals, Inc. J Biomed Mater Res Part A: 107A: 552–560, 2019.

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Thông tin
Thông tin xuất bản

Journal of Biomedical Materials Research - Part A

Tập 107 Số 3

552-560

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