During keratinocyte differentiation and stratification, cells undergo extensive remodeling of their actin cytoskeleton, which is important to control cell mobility and to coordinate and stabilize adhesive structures necessary for functional epithelia. Limited knowledge exists on how the actin cytoskeleton is remodeled in epithelial stratification and whether cell shape is a key determinant to trigger terminal differentiation. In this paper, using human keratinocytes and mouse epidermis as models, we implicate miR-24 in actin adhesion dynamics and demonstrate that miR-24 directly controls actin cable formation and cell mobility. miR-24 overexpression in proliferating cells was sufficient to trigger keratinocyte differentiation both in vitro and in vivo and directly repressed cytoskeletal modulators (PAK4, Tks5, and ArhGAP19). Silencing of these targets recapitulated the effects of miR-24 overexpression. Our results uncover a new regulatory pathway involving a differentiation-promoting microribonucleic acid that regulates actin adhesion dynamics in human and mouse epidermis.

Amelio, I., Lena, A., Viticchiè, G., Shalom, F., R, T., A, ., et al. (2012). miR-24 triggers epidermal differentiation by controlling actin adhesion and cell migration. THE JOURNAL OF CELL BIOLOGY, 199(2), 347-363 [10.1083/jcb.201203134].

miR-24 triggers epidermal differentiation by controlling actin adhesion and cell migration

Amelio, I;BONANNO, ELENA;SPAGNOLI, LUIGI GIUSTO;CANDI, ELEONORA;MELINO, GENNARO
2012-10-15

Abstract

During keratinocyte differentiation and stratification, cells undergo extensive remodeling of their actin cytoskeleton, which is important to control cell mobility and to coordinate and stabilize adhesive structures necessary for functional epithelia. Limited knowledge exists on how the actin cytoskeleton is remodeled in epithelial stratification and whether cell shape is a key determinant to trigger terminal differentiation. In this paper, using human keratinocytes and mouse epidermis as models, we implicate miR-24 in actin adhesion dynamics and demonstrate that miR-24 directly controls actin cable formation and cell mobility. miR-24 overexpression in proliferating cells was sufficient to trigger keratinocyte differentiation both in vitro and in vivo and directly repressed cytoskeletal modulators (PAK4, Tks5, and ArhGAP19). Silencing of these targets recapitulated the effects of miR-24 overexpression. Our results uncover a new regulatory pathway involving a differentiation-promoting microribonucleic acid that regulates actin adhesion dynamics in human and mouse epidermis.
15-ott-2012
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore BIO/11 - BIOLOGIA MOLECOLARE
Settore MED/08 - ANATOMIA PATOLOGICA
English
Con Impact Factor ISI
Cell Movement; Animals; MicroRNAs; GTPase-Activating Proteins; Humans; Cell Differentiation; Mice; RNA, Small Interfering; p21-Activated Kinases; Cell Proliferation; Mice, Transgenic; Epidermis; Phosphoproteins; Cells, Cultured; Keratinocytes; RNA Interference; Actin Cytoskeleton; Cell Adhesion
Amelio, I., Lena, A., Viticchiè, G., Shalom, F., R, T., A, ., et al. (2012). miR-24 triggers epidermal differentiation by controlling actin adhesion and cell migration. THE JOURNAL OF CELL BIOLOGY, 199(2), 347-363 [10.1083/jcb.201203134].
Amelio, I; Lena, A; Viticchiè, G; Shalom, F; R, T; A, ; Dinsdale, D; Russo, G; Fortunato, C; Bonanno, E; Spagnoli, Lg; Aberdam, D; Knight, R; Candi, E; Melino, G
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/78148
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