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Comparative study between lactose-silk fibroin conjugates and extracellular matrices as a substrate for the culture of human induced pluripotent stem cell-derived hepatocytes.
Bio-Medical Materials and Engineering ( IF 1.0 ) Pub Date : 2020-01-01 , DOI: 10.3233/bme-201078
Yohko Gotoh 1 , Shigo Niimi 2 , Kenichi Tamura 3 , Rina Akahira 3 , Mitsuru Inamura 3
Affiliation  

BACKGROUND Human induced pluripotent stem cell (hiPSC)-derived hepatocytes are an attractive alternative cell source to primary human hepatocytes for tissue regeneration. OBJECTIVES This study presents an application of lactose-silk fibroin conjugates (Lac-CY-SF) bearing 𝛽-galactose residues as a substrate for culture of hiPSC-derived hepatocytes. A comparison of hiPSC-derived hepatocytes cultured on three different substrates; Lac-CY-SF conjugates, Matrigel and type I collagen was performed. METHODS Cell morphology, viability, maturation and albumin secretory function were assessed by phase-contrast microscopy, tetrazolium-based colorimetric assay, immunofluorescence staining and enzyme-linked immunosorbent assay. RESULTS Morphological characteristics of the cells cultured on the conjugates resembled those on Matrigel throughout the 6-day culture period. The number of viable cells cultured on the conjugates was comparable to that on Matrigel at day 2 and 6. The protein expression of mature hepatocyte markers, asialoglycoprotein receptor 1 and albumin, by the cells cultured on the conjugates resembled that by the cells cultured on collagen at day 2 and 6. Albumin secretory function per cell cultured on the conjugates was higher than that on collagen and comparable to that on Matrigel. CONCLUSIONS These limited results suggest that Lac-CY-SF conjugates may be as useful as Matrigel and collagen for cultivation of hiPSC-derived hepatocytes.

中文翻译:

乳糖-丝素蛋白缀合物与细胞外基质作为培养人诱导的多能干细胞来源的肝细胞基质的比较研究。

背景技术人诱导的多能干细胞(hiPSC)来源的肝细胞是用于组织再生的原代人肝细胞的有吸引力的替代细胞来源。目的这项研究提出了带有β-半乳糖残基的乳糖-丝素蛋白结合物(Lac-CY-SF)作为hiPSC来源的肝细胞培养的底物的应用。在三种不同底物上培养的hiPSC来源的肝细胞的比较;进行了Lac-CY-SF偶联物,基质胶和I型胶原蛋白。方法采用相差显微镜,基于四唑鎓的比色法,免疫荧光染色和酶联免疫吸附法对细胞形态,活力,成熟度和白蛋白分泌功能进行评估。结果在整个6天的培养期内,在缀合物上培养的细胞的形态学特征与在Matrigel上相似。在结合物上培养的活细胞数量与第2天和第6天在Matrigel上的细胞数量相当。在结合物上培养的细胞,成熟肝细胞标志物,去唾液酸糖蛋白受体1和白蛋白的蛋白表达与在胶原蛋白上培养的细胞相似。在第2天和第6天。在缀合物上培养的每个细胞的白蛋白分泌功能高于胶原蛋白,并且与Matrigel相当。结论这些有限的结果表明,Lac-CY-SF共轭物可能与基质胶和胶原蛋白一样有用,可用于培养hiPSC衍生的肝细胞。结合物上培养的细胞成熟肝细胞标志物去唾液酸糖蛋白受体1和白蛋白的蛋白表达与胶原蛋白培养的细胞在第2天和第6天的表达相似。每个结合物上培养的细胞的白蛋白分泌功能均高于胶原蛋白。与Matrigel相当。结论这些有限的结果表明,Lac-CY-SF共轭物可能与基质胶和胶原蛋白一样有用,可用于培养hiPSC衍生的肝细胞。结合物上培养的细胞成熟肝细胞标志物去唾液酸糖蛋白受体1和白蛋白的蛋白表达与胶原蛋白培养的细胞在第2天和第6天的表达相似。每个结合物上培养的细胞的白蛋白分泌功能均高于胶原蛋白。与Matrigel相当。结论这些有限的结果表明,Lac-CY-SF共轭物可能与基质胶和胶原蛋白一样有用,可用于培养hiPSC衍生的肝细胞。
更新日期:2020-03-02
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