Cleavage of HCV by HCV specific deoxyribozyme in vitro / 中华肝脏病杂志
Chinese Journal of Hepatology
;
(12): 900-902, 2005.
Article
in Chinese
| WPRIM
| ID: wpr-276313
ABSTRACT
<p><b>OBJECTIVE</b>To study the cleavage activity of specific deoxyribozyme to hepatitis C virus in vitro.</p><p><b>METHODS</b>Three deoxyribozymes were designed to cleave at sites 157, 168, 173 in HCV 5'-noncoding region with the active region of 5'-GGCTAGCTACAACGA-3' respectively. Plasmid pCMV/T7-NCRC -Delta Luc was completely linearized with restriction endonuclease Xba I. HCV RNA5'-NCRC was transcribed in vitro from the linearized products and radiolabelled with [alpha-32P] UTP. Under the conditions of 37 degrees C, pH7.5, Mg2+ 10 mmol/L, the three deoxyribozymes were mixed with substrate RNA individually for 120 minutes and then the reactions were terminated. The cleavaged products were separated with 8% denaturated polyacrylamide gel electrophoresis and displayed by autoradiography. DRz3 was mixed with the substrate RNA at different Mg2+ concentrations. The cleavage efficiency was analyzed with a gel document action analyzing systems.</p><p><b>RESULTS</b>Under the adopted conditions the three deoxyribozymes efficiently cleaved to the target RNA in vitro and the cleavage activity of DRz3 was increased with the increase of Mg2+ concentration.</p><p><b>CONCLUSION</b>The designed deoxyribozymes can cleave 5'-NCR mRNA of HCV efficiently in vitro and it is dose-respondent to Mg2+ concentration.</p>
Full text:
Available
Index:
WPRIM (Western Pacific)
Main subject:
Therapeutics
/
DNA, Single-Stranded
/
RNA, Messenger
/
Genetic Therapy
/
Hepatitis C
/
Hepacivirus
/
DNA, Catalytic
/
Genetics
Limits:
Humans
Language:
Chinese
Journal:
Chinese Journal of Hepatology
Year:
2005
Type:
Article
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