A Novel Smooth Muscle-specific Enhancer Regulates Transcription of the Smooth Muscle Myosin Heavy Chain Gene in Vascular Smooth Muscle Cells (*)
A Novel Smooth Muscle-specific Enhancer Regulates Transcription of the Smooth Muscle Myosin Heavy Chain Gene in Vascular Smooth Muscle Cells (*)
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一种新型平滑肌特异性增强剂调节血管平滑肌细胞中平滑肌肌球蛋白重链基因的转录 (*)
DOI:
10.1074/jbc.270.52.30949
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发表时间:
1995
期刊:
影响因子:
--
通讯作者:
P. Babij
中科院分区:
文献类型:
--
作者:
R. Kallmeier;C. Somasundaram;P. Babij
Transient DNA transfection analysis of 5′ end deletion mutants of the rabbit smooth muscle myosin heavy chain (SMHC) gene promoter was performed in primary cultures of rabbit vascular smooth muscle cells (VSMC). A positive element located at position −1,332 upstream of the transcription start site consistently gave the highest relative chloramphenicol acetyltransferase (CAT) activity (6.3 ± 1.5-fold over the minimal SMHC promoter), suggesting that inclusion of the extra 107-base pair (bp) DNA fragment between −1,332 and −1,225 could significantly enhance CAT activity in VSMC. Transfection of mutants into several muscle and nonmuscle cell lines did not show any significant CAT activity above control, showing that factors unique to smooth muscle cells were required for SMHC expression. Gel shift analysis indicated that multiple factors interacted with the 107-bp element, two of which appeared to show smooth muscle specificity. Tests of enhancer function in transfected VSMC indicated that the 107-bp fragment behaved as a classical enhancer, i.e. independently of position and orientation. These results indicate that a novel DNA element may regulate the tissue-restricted expression of the SMHC gene and provides the first example of a role for a smooth muscle-specific enhancer in VSMC.
DOI:
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发表时间:
1994
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Katoh,Y;Loukianov,E;Kopras,E;Zilberman,A;Periasamy,M
通讯作者:
Periasamy,M
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
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作者:
Foster,DN;Min,B;Foster,LK;Stoflet,ES;Sun,S;Getz,MJ;Strauch,AR
通讯作者:
Strauch,AR
DOI:
--
发表时间:
1992
期刊:
The Journal of biological chemistry
影响因子:
--
作者:
Blank,RS;McQuinn,TC;Yin,KC;Thompson,MM;Takeyasu,K;Schwartz,RJ;Owens,GK
通讯作者:
Owens,GK