title: Low electromagnetic field (50 Hz) induces differentiation on primary human oral keratinocytes (HOK).
abstract: This work concerns the effect of low frequency electromagnetic fields (ELF) on biochemical properties of human oral keratinocytes (HOK). Cells exposed to a 2 mT, 50 Hz, magnetic field, showed by scanning electron microscopy (SEM) modification in shape and morphology; these modifications were also associated with different actin distribution, revealed by phalloidin fluorescence analysis. Moreover, exposed cells had a smaller clonogenic capacity, and decreased cellular growth. Indirect immunofluorescence with fluorescent antibodies against involucrin and beta-catenin, both differentiation and adhesion markers, revealed an increase in involucrin and beta-catenin expression. The advance in differentiation was confirmed by a decrease of expression of epidermal growth factor (EGF) receptor in exposed cells, supporting the idea that exposure to electromagnetic field carries keratinocytes to higher differentiation level. These observations support the hypothesis that 50 Hz electromagnetic fields may modify cell morphology and interfere in differentiation and cellular adhesion of normal keratinocytes.
authors.affiliation: Istituto di Neurobiologia e Medicina Molecolare (INeMM), CNR, Rome, Italy.
authors.forename: Vanessa
authors.initials: V
authors.lastname: Manni
authors.forename: Antonella
authors.initials: A
authors.lastname: Lisi
authors.forename: Sabrina
authors.initials: S
authors.lastname: Rieti
authors.forename: Annalucia
authors.initials: A
authors.lastname: Serafino
authors.forename: Mario
authors.initials: M
authors.lastname: Ledda
authors.forename: Livio
authors.initials: L
authors.lastname: Giuliani
authors.forename: Donatella
authors.initials: D
authors.lastname: Sacco
authors.forename: Enrico
authors.initials: E
authors.lastname: D'Emilia
authors.forename: Settimio
authors.initials: S
authors.lastname: Grimaldi
mesh_terms: D000199:Actins / Q000378:metabolism*; D002454:Cell Differentiation / Q000528:radiation effects*; D002455:Cell Division / Q000528:radiation effects; D002478:Cells, Cultured; D003598:Cytoskeletal Proteins / Q000378:metabolism; D004307:Dose-Response Relationship, Radiation; D004560:Electricity; D004574:Electromagnetic Fields; D004815:Epidermal Growth Factor / Q000378:metabolism; D006801:Humans; D015603:Keratinocytes / Q000502:physiology / Q000528:radiation effects* / Q000648:ultrastructure*; D009055:Mouth; D011498:Protein Precursors / Q000378:metabolism; D011829:Radiation Dosage; D014018:Tissue Distribution; D015534:Trans-Activators / Q000378:metabolism; D051176:beta Catenin
chemical_list: D000199:Actins; C495270:CTNNB1 protein, human; D003598:Cytoskeletal Proteins; D011498:Protein Precursors; D015534:Trans-Activators; D051176:beta Catenin; C032253:involucrin; D004815:Epidermal Growth Factor