title: Comparison of mesenchymal stem cells released from poly(N-isopropylacrylamide) copolymer film and by trypsinization.
abstract: Temperature-responsive platforms containing poly(N-isopropylacrylamide) (PNIPAAm) have been developed as an effective substitute for enzymatic treatment to recover adherent cells, but it remains unclear whether this alternative harvesting method tends to support stem cells preserving them being primitive. This study mainly investigated the biological properties of mesenchymal stem cells derived from rat bone marrow and human adipose tissue (BM-MSCs and AT-MSCs) after being cultured on PNIPAAm copolymer films and recovered by temperature drop, and compared the cells harvested from glass coverslips with trypsinization as controls. The experimental results demonstrated that after three serial passages, the released MSCs from thermal liftoff showed no significant differences in cell morphology, immunophenotype and osteogenesis for BM-MSCs or adipogenesis for AT-MSCs, but had higher viability, stronger proliferation and higher adipogenic differentiation for BM-MSCs or higher osteogenic differentiation for AT-MSCs compared with the trypsinization group. Besides, more proteins remained around or within the cell membranes upon temperature drop. It is concluded that cell detachment with more extracellular matrix proteins facilitates the maintenance of membrane proteins, and accordingly preserves MSC properties related to viability, proliferation and differentiation to some extent. This indicates that the PNIPAAm copolymer films and their matching cooling treatment can be used as effective alternatives to the existing culture substrates and traditional enzymatic digestion for MSCs.
authors.affiliation: Dalian R&D Center for Stem Cell and Tissue Engineering, Dalian University of Technology, Dalian 116024, People's Republic of China.
authors.forename: Lei
authors.initials: L
authors.lastname: Yang
authors.forename: Fang
authors.initials: F
authors.lastname: Cheng
authors.forename: Tianqing
authors.initials: T
authors.lastname: Liu
authors.forename: Jian R
authors.initials: JR
authors.lastname: Lu
authors.forename: Kedong
authors.initials: K
authors.lastname: Song
authors.forename: Lili
authors.initials: L
authors.lastname: Jiang
authors.forename: Shuang
authors.initials: S
authors.lastname: Wu
authors.forename: Wenhua
authors.initials: W
authors.lastname: Guo
mesh_terms: D000178:Acrylamides / Q000737:chemistry*; D000180:Acrylic Resins; D000273:Adipose Tissue / Q000166:cytology* / Q000502:physiology; D000293:Adolescent; D000328:Adult; D000818:Animals; D018929:Cell Culture Techniques / Q000379:methods*; D002454:Cell Differentiation; D002469:Cell Separation / Q000379:methods; D002470:Cell Survival; D002478:Cells, Cultured; D005260:Female; D006801:Humans; D008567:Membranes, Artificial; D059630:Mesenchymal Stem Cells / Q000166:cytology* / Q000502:physiology; D008875:Middle Aged; D011108:Polymers / Q000737:chemistry*; D051381:Rats; D017207:Rats, Sprague-Dawley; D014357:Trypsin / Q000737:chemistry / Q000378:metabolism*; D055815:Young Adult
chemical_list: D000178:Acrylamides; D000180:Acrylic Resins; D008567:Membranes, Artificial; D011108:Polymers; C052970:poly-N-isopropylacrylamide; D014357:Trypsin