title: Research of smooth muscle cells response to fluid flow shear stress by hyaluronic acid micro-pattern on a titanium surface.
abstract: The morphology of vascular smooth muscle cells (SMCs) in the normal physiological state depends on cytoskeletal distribution and topology beneath, and presents vertical to the direction of blood flow shear stress (FFSS) although SMCs physiologically are not directly exposed to the shear conditions of blood flow. However, this condition is relevant for arteriosclerotic plaques and the sites of a vascular stent, and little of this condition in vitro has been studied and reported till now. It is unclear what will happen to SMC morphology, phenotype and function when the direction of the blood flow changed. In this paper, the distribution of SMCs in a specific area on Ti surface was regulated by micro-strips of hyaluronic acid (HA). Cell morphology depended on the distribution of the cytoskeleton extending along the micrographic direction. Simulated vascular FFSS was perpendicular or parallel to the direction of the cytoskeleton distribution. Based on investigating the morphology, apoptotic number, phenotypes and functional factors of SMCs, it was obtained that SMCs of vertical groups showed more apoptosis, expressed more contractile types and secreted less TGF-β1 factor compared with SMCs of parallel groups, the number of ECs cultured by medium from SMCs of parallel groups was larger than vertical groups. This study could help to understand the effect of direction change of FFSS on patterned SMC morphology, phenotype and function.
authors.affiliation: Key Laboratory 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.forename: Kun
authors.initials: K
authors.lastname: Zhang
authors.forename: Ping
authors.initials: P
authors.lastname: Yang
authors.forename: Yuzhen
authors.initials: Y
authors.lastname: Liao
authors.forename: Liangliang
authors.initials: L
authors.lastname: Wu
authors.forename: Jialong
authors.initials: J
authors.lastname: Chen
authors.forename: Ansha
authors.initials: A
authors.lastname: Zhao
authors.forename: Guicai
authors.initials: G
authors.lastname: Li
authors.forename: Nan
authors.initials: N
authors.lastname: Huang
mesh_terms: D002448:Cell Adhesion / Q000187:drug effects; D049109:Cell Proliferation; D002478:Cells, Cultured; D003198:Computer Simulation; D003599:Cytoskeleton / Q000378:metabolism; D006801:Humans; D006820:Hyaluronic Acid / Q000737:chemistry*; D044085:Microfluidics; D032389:Myocytes, Smooth Muscle / Q000166:cytology / Q000378:metabolism / Q000502:physiology*; D013314:Stress, Mechanical; D013312:Stress, Physiological; D013499:Surface Properties; D014025:Titanium / Q000737:chemistry*; D016212:Transforming Growth Factor beta / Q000378:metabolism; D014469:Umbilical Arteries / Q000166:cytology; D014471:Umbilical Veins / Q000166:cytology
chemical_list: D016212:Transforming Growth Factor beta; D006820:Hyaluronic Acid; D014025:Titanium
keywords: Arteriosclerotic plaques; Fluid flow shear stress; Phenotype; Smooth muscle cells; Topology