Pregnancy-specific glycoprotein gene expression and the induction by 5-bromo-2'-deoxyuridine.
Pregnancy-specific glycoprotein gene expression and the induction by 5-bromo-2'-deoxyuridine.
复制标题
妊娠特异性糖蛋白基因表达和 5-溴-2-脱氧尿苷的诱导。
DOI:
10.1021/bi00189a030
复制
发表时间:
1994
期刊:
影响因子:
2.9
通讯作者:
J. Chou
中科院分区:
文献类型:
--
作者:
C. Pan;M. Chamberlin;S. Wu;W. Chan;J. Chou
The pregnancy-specific glycoproteins (PSGs) of the placenta, members of the immunoglobulin superfamily, are encoded by multiple linked genes located on chromosome 19. To study the control of PSG expression, we have immortalized differentiated human placental cells (HP-A1) temperature-sensitive for transformation by a recombinant adenovirus-(ori-)-SV40 tsA mutant virus. We now show that expression of the PSG gene in HP-A1 cells is temperature-sensitive. At the permissive temperature (33 degrees C), these cells expressed low levels of PSG mRNA and synthesized a 64-kDa PSG. Shifting HP-A1 cells to a nonpermissive temperature (39.5 degrees C) increased PSG mRNA expression and biosynthesis with preferential increase in the synthesis of a 54-kDa and a low level of a 72-kDa PSG. Moreover, PSG expression was greatly induced by 5-bromo-2'-deoxyuridine (BudR), which selectively increased synthesis of PSGs of 72 and 54 kDa. In the presence of BudR, HP-A1 synthesized PSGs of 72, 64, and 54 kDa, similar to the pattern seen with placental PSGs. Ribonuclease protection assays demonstrated that HP-A1 cells express the majority of PSG mRNAs and BudR stimulated expression of PSG1 and PSG1-like transcripts. Reverse transcription and polymerase chain reaction analysis using PSG gene-specific primers demonstrated that untreated HP-A1 cells expressed primarily PSG1, PSG2, PSG4, and PSG5 mRNAs. BudR stimulated the expression of all PSG transcripts except PSG4. Moreover, in transient expression assays, BudR increased chloramphenicol acetyltransferase (CAT) expression directed by PSG1-I, PSG4, PSG5, PSG6, and PSG11 promoter-CAT fusion genes.(ABSTRACT TRUNCATED AT 250 WORDS)
影响因子:
4.3
作者:
Chan,WY;Zheng,QX;McMahon,J;Tease,LA
通讯作者:
Tease,LA
DOI:
10.1089/dna.1.1988.7.545
发表时间:
1988
期刊:
DNA (Mary Ann Liebert, Inc.)
影响因子:
--
作者:
Chan,WY;Borjigin,J;Zheng,QX;Shupert,WL
通讯作者:
Shupert,WL