Linked Life Data

8416748

Source:http://linkedlifedata.com/resource/pubmed/id/8416748

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1
pubmed:dateCreated
1993-1-25
pubmed:abstractText
The UVB (290-320 nm) portion of the solar spectrum possesses the highest activity for the induction of skin cancer and has the capacity to stimulate epidermal proliferation. We report that UVB is a transcriptional inducer of the c-fos protooncogene in mouse JB6 epidermal cells. Induction is biphasic with an immediate early peak at 30-60 min and a second broader peak 8 h following irradiation. The immediate early phase is suppressed by inhibitors of nuclear adenosine diphosphoribose transferase. For UVB induction, the formation of full-length messages is less efficient than of early, short messages, while both types of messages are produced at similar rates following serum stimulation. Experiments with stable transfectants with reporter constructs linked to 5'-upstream sequences of c-fos indicate that UVB and serum stimulation both require the sequences from -345 to -285 which contain the joint DSE-AP-1 enhancer motifs for efficient induction. Mobility shift data reveal that the complement of c-Fos and c-Jun proteins which bind to the fos-AP-1 octanucleotide decrease immediately following irradiation. Increased binding of Fos and Jun is observed 8-24 h later. UVB did not cause an observable change in the nuclear proteins which bind to the dyad symmetry element oligonucleotide in vitro. Fos protein was detected among the binding proteins. We propose that the two phases of UVB-induced c-fos expression occur by quite different mechanisms. The immediate early phase is inhibited by adenosine diphosphoribose transferase inhibitors because poly-ADP ribosylation of chromosomal proteins is required for the resealing of UVB-induced DNA strand breaks which otherwise retard message elongation. The production of an autocrine factor may be responsible for the late phase of c-fos induction.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0008-5472
pubmed:author
pubmed:issnType
Print
pubmed:day
1
pubmed:volume
53
pubmed:geneSymbol
c-fos
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
38-45
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:8416748-Animals, pubmed-meshheading:8416748-Base Sequence, pubmed-meshheading:8416748-Benzamides, pubmed-meshheading:8416748-Cell Nucleus, pubmed-meshheading:8416748-Cells, Cultured, pubmed-meshheading:8416748-DNA Damage, pubmed-meshheading:8416748-Down-Regulation, pubmed-meshheading:8416748-Epidermis, pubmed-meshheading:8416748-Gene Expression Regulation, Neoplastic, pubmed-meshheading:8416748-Genes, fos, pubmed-meshheading:8416748-Male, pubmed-meshheading:8416748-Mice, pubmed-meshheading:8416748-Molecular Sequence Data, pubmed-meshheading:8416748-Oligonucleotides, pubmed-meshheading:8416748-Oncogene Protein p65(gag-jun), pubmed-meshheading:8416748-Oncogene Proteins v-fos, pubmed-meshheading:8416748-Poly(ADP-ribose) Polymerases, pubmed-meshheading:8416748-Poly Adenosine Diphosphate Ribose, pubmed-meshheading:8416748-Skin Neoplasms, pubmed-meshheading:8416748-Transcription, Genetic, pubmed-meshheading:8416748-Ultraviolet Rays
pubmed:year
1993
pubmed:articleTitle
Mechanism of induction of c-fos by ultraviolet B (290-320 nm) in mouse JB6 epidermal cells.
pubmed:affiliation
Department of Carcinogenesis, Swiss Institute for Experimental Cancer Research, Lausanne.
pubmed:publicationType
Journal Article, Comparative Study, Research Support, Non-U.S. Gov't