[Dynamic of DNA-binding activity of transcription factors in A431 cells during their spreading on immobilized ligands].
Dynamics of actin cytoskeleton in A431 cells and specific NF-kappaB SRF and AP-1 DNA-binding activities were studied during a 2 h spreading of these cells on fibronectin, laminin-2/4 or an antibody to epidermal growth factor receptor. Cell spreading was shown to be accompanied by sequential formation of actin cytoskeleton structures, whose spatial organization depends on the type of immobilized ligand. We have determined the time intervals, within which certain forms of cytoskeleton do not change qualitatively and are specific for dominant part of cell population. It has been shown that DNA-binding activities of the above transcription factors studied oscillate during cell spreading. The cycles of DNA-binding activity were found to be equel to 15-40 min. The character of oscillations depends on both transcription factor and ligand type. The temporal comparison of presses of actin cytoskeleton formation and DNA-binding activity of NF-kappaB and SRF times suggest that actin cytoskeleton reorganization may be presumably associated with activation of NF-KppaB and SRF.
Emel'ianov
A N
AN
Petukhova
O A
OA
Turoverova
L V
LV
Kropacheva
I V
IV
Pinaev
G P
GP
D000199:Actins / Q000378:metabolism; D000906:Antibodies / Q000378:metabolism; D002448:Cell Adhesion; D045744:Cell Line, Tumor; D003599:Cytoskeleton / Q000378:metabolism; D004268:DNA-Binding Proteins; D066246:ErbB Receptors / Q000378:metabolism; D005353:Fibronectins / Q000378:metabolism; D006801:Humans; D007797:Laminin / Q000378:metabolism; D016328:NF-kappa B / Q000378:metabolism; D013997:Time Factors; D018808:Transcription Factor AP-1 / Q000378:metabolism*; D050808:ets-Domain Protein Elk-4 / Q000378:metabolism*
D000199:Actins; D000906:Antibodies; D004268:DNA-Binding Proteins; D005353:Fibronectins; D007797:Laminin; D016328:NF-kappa B; D018808:Transcription Factor AP-1; D050808:ets-Domain Protein Elk-4; D066246:ErbB Receptors