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1.
001-es BibID:
BIBFORM024098
Első szerző:
Sejersen, Thomas
Cím:
Similarities and differences in the regulation of N-myc and c-myc genes in murine embryonal carcinoma cells / Sejersen T., Rahm M., Szabo G., Ingvarsson S., Sumegi J.
Dátum:
1987
Megjegyzések:
c-myc and N-myc are closely related genes coding for putative DNA-binding proteins. The protein products of both genes have been implicated in the regulation of growth of normal and neoplastic cells. We compared the regulation of N-myc and c-myc expression under different growth conditions as well as in vitro differentiation of the murine EC lines F9 and PCC7. N-myc and c-myc expression was found to be regulated by distinct mechanisms, although similarities exist. Differences were found both at the transcriptional and at the post-transcriptional level. The two myc genes were regulated by mainly posttranscriptional mechanisms, but in PCC7 cells nuclear run-on assays indicated that c-myc was repressed at the level of transcription. N-myc and c-myc expression was negatively regulated at a post-transcriptional level in F9 and PCC7 cells during differentiation to visceral endoderm and nerve-like tissue, respectively. Serum stimulation of F9 cells for 4 h induced a sevenfold increase in c-myc transcripts but no significant elevation of N-myc transcripts. Mitogenic stimulation with insulin and transferrin also induced a marked elevation of c-myc but not of N-myc mRNA. In addition, the N-myc and c-myc genes differed in F9 cells with respect to (i) the kinetics of expression following induction of differentiation, c-myc undergoing quicker changes than N-myc; (ii) the response to cycloheximide inhibition of protein synthesis, indicating that c-myc but not N-myc is down-regulated by a short-lived protein; and (iii) the half-lives of the transcripts, estimated to be approximately 40 min of c-myc and 130 min for N-myc
Tárgyszavak:
Orvostudományok
Elméleti orvostudományok
idegen nyelvű folyóiratközlemény külföldi lapban
Animal
Carcinoma
carcinoma cell
Cell Differentiation
Cell Line
Cells
Comparative Study
cycloheximide
differentiation
DNA-Binding Proteins
Endoderm
Gene Expression Regulation
genetics
In Vitro
Insulin
Kinetics
Mice
Neoplasm Proteins
Neurons
nonhuman
protein synthesis
Proteins
proto oncogene
Proto-Oncogene Proteins
Proto-Oncogene Proteins c-myc
Proto-Oncogenes
rna
Support,Non-U.S.Gov't
Teratoma
Transferrin
Tumor Cells,Cultured
Megjelenés:
Experimental Cell Research. - 172 : 2 (1987), p. 304-317. -
További szerzők:
Rahm, Magnus
Szabó Gábor (1953-) (biofizikus)
Ingvarsson, Sigurdur
Sümegi János
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elektronikus változat
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