title: Biochemical characterization of the cell-biomaterial interface by quantitative proteomics.
abstract: Surface topography and texture of cell culture substrata can affect the differentiation and growth of adherent cells. The biochemical basis of the transduction of the physical and mechanical signals to cellular responses is not well understood. The lack of a systematic characterization of cell-biomaterial interaction is the major bottleneck. This study demonstrated the use of a novel subcellular fractionation method combined with quantitative MS-based proteomics to enable the robust and high-throughput analysis of proteins at the adherence interface of Madin-Darby canine kidney cells. This method revealed the enrichment of extracellular matrix proteins and membrane and stress fibers proteins at the adherence surface, whereas it shows depletion of extracellular matrix belonging to the cytoplasmic, nucleus, and lateral and apical membranes. The asymmetric distribution of proteins between apical and adherence sides was also profiled. Apart from classical proteins with clear involvement in cell-material interactions, proteins previously not known to be involved in cell attachment were also discovered.
authors.affiliation: Department of Orthopaedics and Traumatology, LKS Faculty of Medicine, Queen Mary Hospital, The University of Hong Kong, Pokfulam, Hong Kong.
authors.forename: W Y
authors.initials: WY
authors.lastname: Tong
authors.forename: Y M
authors.initials: YM
authors.lastname: Liang
authors.forename: V
authors.initials: V
authors.lastname: Tam
authors.forename: H K
authors.initials: HK
authors.lastname: Yip
authors.forename: Y T
authors.initials: YT
authors.lastname: Kao
authors.forename: K M C
authors.initials: KM
authors.lastname: Cheung
authors.forename: K W K
authors.initials: KW
authors.lastname: Yeung
authors.forename: Y W
authors.initials: YW
authors.lastname: Lam
mesh_terms: D000818:Animals; D002478:Cells, Cultured; D004285:Dogs; D016326:Extracellular Matrix Proteins / Q000378:metabolism; D013058:Mass Spectrometry; D040901:Proteomics
chemical_list: D016326:Extracellular Matrix Proteins