title: Lipoproteins modulate growth and differentiation of cultured human epidermal keratinocytes.
abstract: The effects of various lipoproteins on the growth and the differentiation of cultured normal human keratinocytes were investigated. Primary cultures of human epidermal keratinocytes were obtained from neonatal foreskin, and then added with lipoproteins, very low density lipoprotein (VLDL), low density lipoprotein (LDL), and high density lipoprotein (HDL). Cell growth potential was examined using the 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay. VLDL and LDL enhanced keratinocytes growth and LDL receptor expression at the plasma membrane level. These effects were more remarkably observed in cells cultured with VLDL than in cells cultured with LDL. Apolipoprotein E (ApoE) was highly increased in VLDL treated cells. These results suggest that VLDL binds with high affinity to cell surface receptors and induces cell proliferation.
authors.affiliation: Department of Biochemistry, Yamaguchi University School of Medicine, Ube, Japan.
authors.forename: Hiroko
authors.initials: H
authors.lastname: Furumoto
authors.forename: Hirofumi
authors.initials: H
authors.lastname: Arai
authors.forename: Yasuhiro
authors.initials: Y
authors.lastname: Kuramitsu
authors.forename: Yuri
authors.initials: Y
authors.lastname: Saeki
authors.forename: Toshikazu
authors.initials: T
authors.lastname: Gondo
authors.forename: Tokuhiro
authors.initials: T
authors.lastname: Ishihara
authors.forename: Takahiro
authors.initials: T
authors.lastname: Shimizu
authors.forename: Masanori
authors.initials: M
authors.lastname: Fujimoto
authors.forename: Kazuyuki
authors.initials: K
authors.lastname: Nakamura
mesh_terms: D001057:Apolipoproteins E / Q000096:biosynthesis; D002454:Cell Differentiation / Q000187:drug effects; D002455:Cell Division / Q000187:drug effects; D002478:Cells, Cultured; D000078404:Epidermal Cells; D006801:Humans; D015603:Keratinocytes / Q000166:cytology / Q000187:drug effects* / Q000378:metabolism; D008075:Lipoproteins, HDL / Q000494:pharmacology*; D008077:Lipoproteins, LDL / Q000494:pharmacology*; D008079:Lipoproteins, VLDL / Q000494:pharmacology*; D011973:Receptors, LDL / Q000096:biosynthesis
chemical_list: D001057:Apolipoproteins E; D008075:Lipoproteins, HDL; D008077:Lipoproteins, LDL; D008079:Lipoproteins, VLDL; D011973:Receptors, LDL