The use of hyaluronan and its sulphated derivative patterned with micrometric scale on glass substrate in melanocyte cell behaviour

• Published in: Biomaterials Vol. 24; no. 6; pp. 915 - 926
• Main Authors: Barbucci, R, Magnani, A, Lamponi, S, Pasqui, D, Bryan, S
• Format: Journal Article
• Language: English
• Published: Netherlands Elsevier Ltd 01.03.2003
• Subjects: Animals; Cell Adhesion - drug effects; Cell behaviour; Cell Culture Techniques - methods; Cell Line; Cells, Immobilized - drug effects; Cells, Immobilized - physiology; Cells, Immobilized - ultrastructure; Glass; Hyaluronic Acid - analogs & derivatives; Hyaluronic Acid - chemical synthesis; Hyaluronic Acid - pharmacology; Melanocytes; Melanocytes - drug effects; Melanocytes - physiology; Melanocytes - ultrastructure; Mice; Micropatterned surfaces; Microscopy, Atomic Force; Microscopy, Electron, Scanning; Spectrometry, Mass, Secondary Ion; Spectroscopy, Fourier Transform Infrared; Sulfuric Acid Esters - chemical synthesis; Sulfuric Acid Esters - pharmacology; Sulphated hyaluronic acid; Melanocytes; Sulphated hyaluronic acid; Micropatterned surfaces; Cell behaviour
• ISSN: 0142-9612; 1878-5905
• DOI: 10.1016/S0142-9612(02)00425-8

Surface microfabrication techniques were widely utilised for the spatial control of in vitro cell behaviour. A photo-immobilisation procedure was utilised to create micropatterned surfaces: four different stripe patterns (100, 50, 25 and 10 μm) of hyaluronan (Hyal) and its sulphated derivative (HyalS) on silanised glass substrate were obtained. The morphological analysis showed that the surface topography showed regular stripes of 100, 50, 25 and 10 μm wide and ranging from 300 nm up to 1 μm in thickness. They reproduced the exact photo-mask pattern: glass stripes alternating with polysaccharide ones. On the contrary, Hyal microstructures showed just a topographic pattern as the glass stripes appeared to be covered by a thin layer of the macromolecule by TOF-SIMS. Cell adhesion studies demonstrated that melanocytes adhered and oriented within the first 2 h of culture on HyalS microdomains and not on Hyal microstructures where they spread on glass substrate around the patterned area. Double photo-immobilised samples characterised by a 100 μm stripe pattern of Hyal or HyalS on the top of a continuous layer of the two polysaccharides were also created in order to investigate the effect of the topography on cell behaviour. The obtained results demonstrated that melanocytes adhered on HyalS stripes while on the Hyal micropatterned surfaces they spread on silanised glass substrate around the structured area, resulting in the exclusion of the topographic pattern.