title: Detection of collagen synthesis by human osteoblasts on a tricalcium phosphate hydroxyapatite: an X-ray photoelectron spectroscopy investigation.
abstract: The effect of a hydroxyapatite-tricalcium phosphate (HA) material on collagen synthesis by human osteoblasts was investigated using X-ray photoelectron spectroscopy (XPS). To this aim, thin HA slices were exposed to osteoblasts harvested from three different patients, for 20 days and then analyzed by XPS. Platinum plates were also exposed to the cells for comparison, and control tests were performed on both materials using cell-free media. XPS analysis supported by standard spectra of some polyaminoacids and of collagen deposited on HA suggested that a deposition of collagen occurred on the HA slices in the presence of osteoblasts. On the other hand, only an aspecific deposition of proteins was observed on platinum and when cell-free media were used. These data were confirmed evaluating collagen synthesis by [(3)H]proline incorporation of osteoblasts exposed to HA.
authors.affiliation: Ist Orthopaedic Department, University of Bari, Bari, Italy.
authors.forename: G
authors.initials: G
authors.lastname: Zambonin
authors.forename: I
authors.initials: I
authors.lastname: Losito
authors.forename: J T
authors.initials: JT
authors.lastname: Triffitt
authors.forename: C G
authors.initials: CG
authors.lastname: Zambonin
mesh_terms: D001672:Biocompatible Materials / Q000737:chemistry*; D001854:Bone Marrow Cells / Q000187:drug effects / Q000378:metabolism; D002130:Calcium Phosphates / Q000737:chemistry*; D003094:Collagen / Q000096:biosynthesis*; D003470:Culture Media; D017886:Durapatite / Q000737:chemistry*; D006801:Humans; D010006:Osteoblasts / Q000378:metabolism*; D010455:Peptides / Q000494:pharmacology; D010984:Platinum; D011392:Proline / Q000378:metabolism; D013052:Spectrometry, X-Ray Emission
chemical_list: D001672:Biocompatible Materials; D002130:Calcium Phosphates; D003470:Culture Media; D010455:Peptides; C485828:alpha-tricalcium phosphate; C485830:tetracalcium phosphate; D010984:Platinum; C485838:calcium phosphate, monobasic, anhydrous; D003094:Collagen; D017886:Durapatite; C020243:calcium phosphate; D011392:Proline; C485829:calcium phosphate, dibasic, anhydrous