title: Pulsatile culture of a poly(DL-lactic-co-glycolic acid) sandwiched cell/hydrogel construct fabricated using a step-by-step mold/extraction method.
abstract: To overcome the weak mechanical properties of cell/hydrogel composites, a poly(DL-lactic-co-glycolic acid) sandwiched adipose-derived stem cell (ADSC)/fibrin construct was fabricated using a step-by-step mold/extraction method to generate the middle smooth muscle layer of natural blood vessels. A pulse bioreactor with an adjustable 0-0.2 MPa pressure, 0-7% pulse amplitude, and 0-80 times/min pulse frequency was developed to mimic the liquid movement in the natural blood vessels. This new type of pulse bioreactor is sterilizable and dismantles easily. A comparative study was conducted with static and dynamic in vitro cultures. Exogenous growth factors, such as hepatocyte growth factor, platelet-derived growth factor BB, transforming growth factor β1, and basic fibroblast growth factor were used as additives in the culture medium for inducing the ADSCs into smooth muscle cells. The dynamic training, integrated with the growth factor, induced the transformation of ADSCs into smooth muscle-like cells with regular arrangement. This strategy shows promise of being widely used in tissue engineering and complex organ manufacturing.
authors.affiliation: Key Laboratory for Advanced Materials Processing Technology, Ministry of Education & Center of Organ Manufacturing, Department of Mechanical Engineering, Tsinghua University Institute of Life Science & Medicine, Tsinghua University, Beijing, China. wangxiaohong@tsinghua.edu.cn
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Wang
authors.forename: Shaochun
authors.initials: S
authors.lastname: Sui
mesh_terms: D000273:Adipose Tissue / Q000166:cytology; D000818:Animals; D019149:Bioreactors; D002454:Cell Differentiation; D002470:Cell Survival; D002478:Cells, Cultured; D004867:Equipment Design; D005337:Fibrin / Q000378:metabolism*; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate / Q000378:metabolism; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism; D019344:Lactic Acid / Q000378:metabolism*; D032389:Myocytes, Smooth Muscle / Q000166:cytology*; D011100:Polyglycolic Acid / Q000378:metabolism*; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D011673:Pulsatile Flow; D051381:Rats; D017207:Rats, Sprague-Dawley; D013234:Stem Cells / Q000166:cytology*; D023822:Tissue Engineering / Q000295:instrumentation* / Q000379:methods; D054457:Tissue Scaffolds / Q000737:chemistry
chemical_list: D036341:Intercellular Signaling Peptides and Proteins; D000077182:Polylactic Acid-Polyglycolic Acid Copolymer; D020136:Hydrogel, Polyethylene Glycol Dimethacrylate; D011100:Polyglycolic Acid; D019344:Lactic Acid; D005337:Fibrin