title: Evaluation of a laminin-alginate biomaterial, adipocytes, and adipocyte-derived stem cells interaction in animal autologous fat grafting model using 7-Tesla magnetic resonance imaging.
abstract: Biomaterials are often added to autologous fat grafts both as supporting matrices for the grafted adipocytes and as cell carrier for adipose-derived stem cells (ADSCs). This in vivo study used an autologous fat graft model to test a lamininalginate biomaterial, adipocytes, and ADSCs in immune-competent rats. We transplanted different combinations of shredded autologous adipose tissue [designated "A" for adipose tissue]), laminin-alginate beads [designated "B" for bead], and ADSCs [designated "C" for cell]) into the backs of 15 Sprague-Dawley rats. Group A received only adipocytes, Group B received only laminin-alginate beads, Group AB received adipocytes mixed with laminin-alginate beads, Group BC received laminin-alginate beads encapsulating ADSCs, and Group ABC received adipocytes and laminin-alginate beads containing ADSCs. Seven-tesla magnetic resonance imaging was used to evaluate the rats at the 1st, 6th, and 12th weeks after transplantation. At the 12th week, the rats were sacrificed and the implanted materials were retrieved for gross examination and histological evaluation. The results based on MRI, gross evaluation, and histological data all showed that implants in Group ABC had better resorption of the biomaterial, improved survival of the grafted adipocytes, and adipogenic differentiation of ADSCs. Volume retention of grafts in Group ABC (89%) was also significantly greater than those in Group A (58%) (p < 0.01). Our findings support that the combination of shredded adipose tissue with ADSCs in laminin-alginate beads provided the best overall outcome.
authors.affiliation: Institute of Biomedical Engineering, National Taiwan University, Taipei, 10051, Taiwan.|Department of Plastic Surgery, Far Eastern Memorial Hospital, New Taipei City, 22060, Taiwan.
authors.forename: Yo-Shen
authors.initials: YS
authors.lastname: Chen
authors.affiliation: Institute of Biomedical Engineering, National Taiwan University, Taipei, 10051, Taiwan.
authors.forename: Yu-Sheng
authors.initials: YS
authors.lastname: Hsueh
authors.affiliation: Institute of Biomedical Engineering, National Taiwan University, Taipei, 10051, Taiwan.
authors.forename: Yen-Yu
authors.initials: YY
authors.lastname: Chen
authors.affiliation: Department of Pathology, Far Eastern Memorial Hospital, New Taipei City, 22060, Taiwan.
authors.forename: Cheng-Yu
authors.initials: CY
authors.lastname: Lo
authors.affiliation: Department of Plastic Surgery, National Taiwan University Hospital, Taipei, 10051, Taiwan.
authors.forename: Hao-Chih
authors.initials: HC
authors.lastname: Tai
authors.affiliation: Institute of Biomedical Engineering, National Taiwan University, Taipei, 10051, Taiwan. double@ntu.edu.tw.|Institute of Biomedical Engineering and Nanomedicine, National Health Research Institutes, Miaoli, 35053, Taiwan. double@ntu.edu.tw.
authors.forename: Feng-Huei
authors.initials: FH
authors.lastname: Lin
mesh_terms: D017667:Adipocytes / Q000166:cytology*; D050156:Adipogenesis; D000273:Adipose Tissue / Q000637:transplantation*; D000464:Alginates / Q000737:chemistry*; D000818:Animals; D001672:Biocompatible Materials / Q000737:chemistry*; D002470:Cell Survival; D005260:Female; D007797:Laminin / Q000737:chemistry*; D008279:Magnetic Resonance Imaging; D051381:Rats; D017207:Rats, Sprague-Dawley; D013234:Stem Cells / Q000166:cytology*; D013997:Time Factors
chemical_list: D000464:Alginates; D001672:Biocompatible Materials; D007797:Laminin