title: Arabinogalactan protein from Jatropha curcas L. seeds as TGFβ1-mediated inductor of keratinocyte in vitro differentiation and stimulation of GM-CSF, HGF, KGF and in organotypic skin equivalents.
abstract: Arabinogalactan protein JC from Jatropha curcas seed endosperm (mean molecular weight 140 kDa) was isolated by cold water extraction and characterized concerning sugar and amino acid composition. At 10 and 100 µg/mL JC stimulated mitochondrial activity (MTT test) of human skin cells (HaCaT keratinocytes, fibroblasts) and the ATP status of primary keratinocytes. JC did not influence the cellular proliferation, while primary keratinocytes were triggered into differentiation status. Investigations on a potential mode of action of JC were performed on complex organotypic skin equivalents. JC induced the production of HGF, KGF and TGFβ, with TGFβ being the main inductor for the differentiation-inducing effect of JC. Also the expression of GM-CSF was stimulated strongly by JC. This in vitro activity profile indicated JC to be a potent inductor of cellular differentiation via stimulation of growth hormones and TGF-β-induced cell signaling.
authors.affiliation: University of Münster, Institute for Pharmaceutical Biology and Phytochemistry IPBP, Hittorfstraße 56, D-48149 Münster, Germany.
authors.forename: Janina
authors.initials: J
authors.lastname: Zippel
authors.forename: Thomas
authors.initials: T
authors.lastname: Wells
authors.forename: Andreas
authors.initials: A
authors.lastname: Hensel
mesh_terms: D000255:Adenosine Triphosphate / Q000378:metabolism; D002454:Cell Differentiation / Q000187:drug effects*; D002478:Cells, Cultured; D056625:Endosperm; D051523:Fibroblast Growth Factor 7 / Q000378:metabolism; D005347:Fibroblasts / Q000187:drug effects / Q000378:metabolism; D005685:Galactans / Q000302:isolation & purification / Q000494:pharmacology*; D016178:Granulocyte-Macrophage Colony-Stimulating Factor / Q000378:metabolism; D017228:Hepatocyte Growth Factor / Q000378:metabolism; D006801:Humans; D036341:Intercellular Signaling Peptides and Proteins / Q000378:metabolism*; D031286:Jatropha / Q000737:chemistry*; D015603:Keratinocytes / Q000187:drug effects* / Q000378:metabolism; D008928:Mitochondria / Q000187:drug effects; D010936:Plant Extracts / Q000737:chemistry / Q000494:pharmacology*; D012639:Seeds; D015398:Signal Transduction / Q000187:drug effects; D016212:Transforming Growth Factor beta / Q000378:metabolism
chemical_list: D005685:Galactans; D036341:Intercellular Signaling Peptides and Proteins; D010936:Plant Extracts; D016212:Transforming Growth Factor beta; D051523:Fibroblast Growth Factor 7; D017228:Hepatocyte Growth Factor; D016178:Granulocyte-Macrophage Colony-Stimulating Factor; D000255:Adenosine Triphosphate; C005653:arabinogalactan