Expression and stability of c-sis mRNA in human glioblastoma cells.
Expression and stability of c-sis mRNA in human glioblastoma cells.
复制标题
人胶质母细胞瘤细胞中 c-sis mRNA 的表达和稳定性。
DOI:
10.1021/bi00415a051
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发表时间:
1988
期刊:
影响因子:
2.9
通讯作者:
Goldthwait,DA
中科院分区:
文献类型:
--
作者:
Press,RD;Samols,D;Goldthwait,DA
Department of Biochemistry, Case Western Reserve University, Cleveland, Ohio 44106 Received October 1, 1987; Revised Manuscript Received January 7, 1988 abstract: The production of platelet-derived growth factor like (PDGF-like) material by glioblastomas may be involved in the conversion of normal cells to tumor cells. In an investigation of this problem, we have examined some of the properties of the platelet-derived growth factor B-chain mRNA (c-sis mRNA) by a sensitive and quantitative RNA-RNA solution hybridization method. In 5 out of 8 human glioblastoma cell lines, c-sis mRNA was present, and in the linewith the highest level, there were approximately 4-10 molecules per cell. The half-lives of the c-sis mRNA in two glioblastoma cell lines were 2.6 and 3.4 h, while in human umbilical vein endothelial (HUVE) and bladder carcinoma (T24) cells they were 1.6 and 2.5 h, respectively. Inhibiting protein synthesis produced no significant alteration of the c-sis mRNA half-lives in the glioblastoma or HUVE cells. The AU-rich sequence at the 3'end of the c-sis mRNA therefore does not appear to affect the mRNA stability in the presence of cycloheximide as it does in other transcripts. The similarity of the c-sis mRNA half-lives in normal and tumor cells suggests that regulation of stability of c-sis mRNA is not a major factor in tumorigenesis in the glioblastoma celllines examined.] V^ Iechanisms by which normalglial cells are converted to glioblastomas are still poorly understood. Some data are now available, however, suggesting the involvement of an autocrine growth loop (Sporn & Todaro, 1980) in glial cell tumori-genesis, whereby growth factor receptors are altered and/or growth factors themselves are abnormally produced. The epidermal growth factor (EGF) receptor gene, for instance, has been shown to be either amplified or structurally altered in a number of human glioblastomas (Libermann et al., 1985). Rat neuroglioblastomas induced by transplacental ethylnitrosourea (ENU) contain a point mutation in the trans-membrane domain of the c-erb-B-2 (neu) transforming gene (Bargmann et al., 1986), the structure of which has considerable homology to the EGF receptorgene (Schechter et al., 1984). Long-term culture of neonatalrat brain cells similarly treated with ENU results in phenotypic transformation, the timing of whichcorrelates with expression of the c-sis protooncogene (Lens et al., 1986), the gene encoding the B chain of platelet-derived growth factor (PDGF). These ENU-in-
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DOI:
10.1073/pnas.82.8.2404
发表时间:
1985-01-01
影响因子:
11.1
作者:
PANTAZIS, P;PELICCI, PG;ANTONIADES, HN
通讯作者:
ANTONIADES, HN
DOI:
10.1126/science.6209798
发表时间:
1984
期刊:
Science (New York, N.Y.)
影响因子:
--
作者:
Graves,DT;Owen,AJ;Barth,RK;Tempst,P;Winoto,A;Fors,L;Hood,LE;Antoniades,HN
通讯作者:
Antoniades,HN
影响因子:
64.5
作者:
M. Brock;D. Shapiro
通讯作者:
D. Shapiro
DOI:
--
发表时间:
1973
影响因子:
11.1
作者:
W. Murphy;G. Attardi
通讯作者:
G. Attardi
DOI:
--
发表时间:
1983
期刊:
Biochemical and Biophysical Research Communications - BBRC
影响因子:
--
作者:
C. Betsholtz;C. Heldin;M. Nistér;B. Ek;Å. Wasteson;B. Westermark
通讯作者:
B. Westermark