title: A novel coating of type IV collagen and hyaluronic acid on stent material-titanium for promoting smooth muscle cell contractile phenotype.
abstract: The method of stent implantation is currently considered an effective means of treating atherosclerosis. However, implanting of cardiovascular stent often leads to intimal breakage and hyperplasia. The phenomenon that vascular smooth muscle cells (SMCs) transform from contractile to synthetic phenotype becomes a serious obstacle to intimal recovery. To improve how SMCs transform from a synthetic to contractile phenotype, a technique of coimmobilization was used to form type IV collagen (CoIV) and hyaluronic acid (HA) coating on the widely used stent material, titanium (Ti). In this work, several bio-functional coatings made of CoIV/HA mixtures in different ratios were fabricated on the Ti surface. The quantitative characterization of CoIV showed that introducing HA could enhance the amount of the immobilized CoIV on the alkali activated Ti (TiOH) surface. The immunofluorescence staining results of myosin heavy chain (MHC) and DAPI showed that the coating of CoIV/HA in ratios of 200 μg/ml (M200) and 500 μg/ml (M500) also could promote SMCs expressing more contractile phenotype compared with TiOH/CoIV control samples, while the AO/PI staining results indicated that SMCs on the M200 and M500 samples showed less apoptosis ratio. Thus, we hope that this study can provide more helpful exploration and application for promoting the SMC contractile phenotype on the cardiovascular stents.
authors.affiliation: Key Lab. for Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.
authors.forename: Jingan
authors.initials: J
authors.lastname: Li
authors.affiliation: Key Lab. for Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China; School of Life Science, Zhengzhou University, 100 Science Road, Zhengzhou 450001, PR China.
authors.forename: Kun
authors.initials: K
authors.lastname: Zhang
authors.affiliation: Key Lab. for Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.
authors.forename: Huiqing
authors.initials: H
authors.lastname: Chen
authors.affiliation: Key Lab. for Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.affiliation: Key Lab. for Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China. Electronic address: yangping8@263.net.
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.affiliation: Key Lab. for Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.
authors.forename: Yuancong
authors.initials: Y
authors.lastname: Zhao
authors.affiliation: Key Lab. for Advanced Technologies of Materials, Ministry of Education, School of Material Science and Engineering, Southwest Jiaotong University, Chengdu 610031, PR China.
authors.forename: Nan
authors.initials: N
authors.lastname: Huang
mesh_terms: D049109:Cell Proliferation / Q000187:drug effects; D002470:Cell Survival / Q000187:drug effects; D020099:Coated Materials, Biocompatible / Q000494:pharmacology*; D024141:Collagen Type IV / Q000494:pharmacology*; D005455:Fluorescent Antibody Technique; D006801:Humans; D006820:Hyaluronic Acid / Q000494:pharmacology*; D055767:Immobilized Proteins / Q000494:pharmacology; D018625:Microscopy, Atomic Force; D008855:Microscopy, Electron, Scanning; D009119:Muscle Contraction / Q000187:drug effects*; D032389:Myocytes, Smooth Muscle / Q000166:cytology* / Q000187:drug effects; D010641:Phenotype; D012996:Solutions; D017550:Spectroscopy, Fourier Transform Infrared; D015607:Stents; D014025:Titanium / Q000494:pharmacology*
chemical_list: D020099:Coated Materials, Biocompatible; D024141:Collagen Type IV; D055767:Immobilized Proteins; D012996:Solutions; D006820:Hyaluronic Acid; D014025:Titanium
keywords: Bio-functional coating; Contractile smooth muscle cell phenotype; Hyaluronic acid; Titanium; Type IV collagen