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.
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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
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发表时间:
1994
期刊:
影响因子:
2.9
通讯作者:
J. Chou
J. Chou
中科院分区:
生物学3区
文献类型:
--
作者:
C. Pan;M. Chamberlin;S. Wu;W. Chan;J. Chou

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胎盘的妊娠特异性糖蛋白 (PSG) 是免疫球蛋白超家族的成员,由位于 19 号染色体上的多个连锁基因编码。为了研究 PSG 表达的控制,我们对温度敏感的分化人胎盘细胞 (HP-A1) 进行了永生化,以便通过重组腺病毒-(ori-)-SV40 tsA 突变病毒进行转化。我们现在证明 HP-A1 细胞中 PSG 基因的表达对温度敏感。在允许的温度(33 摄氏度)下,这些细胞表达低水平的 PSG mRNA 并合成 64 kDa PSG。将 HP-A1 细胞转移到不允许的温度(39.5 摄氏度)会增加 PSG mRNA 的表达和生物合成,并优先增加 54 kDa 的合成和低水平的 72 kDa PSG。此外,5-bromo-2'-deoxyuridine (BudR) 极大地诱导 PSG 表达,选择性增加 72 和 54 kDa PSG 的合成。在 BudR 存在的情况下,HP-A1 合成 72、64 和 54 kDa 的 PSG,与胎盘 PSG 的模式相似。核糖核酸酶保护测定表明,HP-A1 细胞表达大部分 PSG mRNA,BudR 刺激 PSG1 和 PSG1 样转录物的表达。使用 PSG 基因特异性引物进行的逆转录和聚合酶链反应分析表明,未经处理的 HP-A1 细胞主要表达 PSG1、PSG2、PSG4 和 PSG5 mRNA。 BudR 刺激除 PSG4 之外的所有 PSG 转录物的表达。此外,在瞬时表达测定中,BudR 增加了 PSG1-I、PSG4、PSG5、PSG6 和 PSG11 启动子-CAT 融合基因指导的氯霉素乙酰转移酶 (CAT) 表达。(摘要截短为 250 字)
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)
DOI: 10.1007/bf00230182
发表时间: 1991
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