title: Collagen type I matrix affects molecular and cellular behavior of purified porcine dental follicle cells.
abstract: We investigated porcine dental follicle cells at the early crown-formation stage and examined the behavior of cells grown in a collagen type I (Col-I) matrix. Clone-porcine dental follicle cells (DFC-I) and controls, viz., dental follicle itself, nonclone-dental follicle cells, periodontal ligament cells (PDLC), and bone marrow stromal cells, were obtained from 6-month-old pigs. DFC-I showed a different gene expression pattern from controls by reverse-transcription polymerase chain reaction analysis. In addition, Col-I treatment enhanced DFC-I proliferation and increased their alkaline phosphatase activity compared with nontreated DFC-I. The expression of periostin, biglycan, and osteocalcin (OCN) in cells growing on collagen was upregulated, similar to the pattern seen in PDLC. DFC-I with and without Col-I treatment were combined with beta-tricalcium phosphate particles and implanted into immunodeficient mice. Significant differences were found in the gene expression patterns of bone sialoprotein, OCN, and periostin in both treated and non-treated implants at 2 and/or 4 weeks. The results showed that Col-I induced the mineralization pathway in these cells. Hard tissue formation was observed in both implant types at 8 weeks. Our results suggest that Col-I facilitates the differentiation of DFC-I along the mineralization process.
authors.affiliation: Tooth Regeneration, The Division of Stem Cell Engineering, The Institute of Medical Science, The University of Tokyo, 4-6-1 Shiroganedai, Minato-ku, Tokyo, 108-8639, Japan.
authors.forename: S
authors.initials: S
authors.lastname: Tsuchiya
authors.forename: M J
authors.initials: MJ
authors.lastname: Honda
authors.forename: Y
authors.initials: Y
authors.lastname: Shinohara
authors.forename: M
authors.initials: M
authors.lastname: Saito
authors.forename: M
authors.initials: M
authors.lastname: Ueda
mesh_terms: D000818:Animals; D002454:Cell Differentiation; D049109:Cell Proliferation; D048430:Cell Shape; D002478:Cells, Cultured; D024042:Collagen Type I / Q000235:genetics / Q000378:metabolism*; D003795:Dental Sac / Q000166:cytology*; D005109:Extracellular Matrix / Q000737:chemistry*; D020869:Gene Expression Profiling; D018507:Gene Expression Regulation, Developmental; D051379:Mice; D008963:Molar / Q000033:anatomy & histology / Q000254:growth & development; D013552:Swine
chemical_list: D024042:Collagen Type I