Mechanism for decrease of glucocorticoid receptor mRNA in human hepatic cancer cell line SMMC-7721 during heat shock / 第二军医大学学报
Academic Journal of Second Military Medical University
;
(12): 15-19, 2010.
Article
in Chinese
| WPRIM
| ID: wpr-840956
ABSTRACT
Objective:
To investigate the mechanism for decrease of glucocorticoid receptor mRNA (GR mRNA) during heat shock response.Methods:
The changes of GR mRNA level in SMMC-7721 cells were examined by semi-quantitative RT-PCR during heat shock response. We designed 2 RNA fragments paired with GR gene intron E and cross exon 3, 4, and 5, which were used as probes for in situ hybridization with the sequences in SMMC-7721 cells at different periods after heat shock. The result was subjected to confocol microscope observation and computer image analysis. The transcription, degradation, and splicing of GR mRNA were investigated.Results:
RT-PCR showed that the GR mRNA level was decreased during heat shock response. In situ hybridization revealed that both GR mRNA and GR pre-mRNA levels were lower in the heat shock group than in the non-heat shock group (P<0.05). GR pre-mRNA level was higher in cells treated with actinomycine D before heat shock than in cells only treated with actinomyeine D, while the GR mRNA level was lower in cells treated with actinomycine D before heat shock (P<0.05).Conclusion:
During heat shock response, GR mRNA transcription is suppressed, the splicing of GR pre-mRNA is suppressed, and GR mRNA degradation is accelerated.
Full text:
Available
Index:
WPRIM (Western Pacific)
Language:
Chinese
Journal:
Academic Journal of Second Military Medical University
Year:
2010
Type:
Article
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