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10.3748/wjg.v9.i3.572 http://scihub22266oqcxt.onion/10.3748/wjg.v9.i3.572 C4621585!4621585 !12632521     free     free     free Warning: file_get_contents(https://eutils.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&id=12632521 &cmd=llinks): Failed to open stream: HTTP request failed! 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Preparation and identification of anti-transforming growth factor beta1 U1 small nuclear RNA chimeric ribozyme in vitro |pdf=|usr=}}{{12632521 }} gab.com Text Preparation and identification of anti-transforming growth factor beta1 U1 small nuclear RNA chimeric ribozyme in vitro JO: World J Gastroenterol http://www.kidney.de/pget.php?&tw=1&pmid=12632521 #FOAvip AIM: To study the preparation and cleavage activity of anti-transforming growth factor (TGF)beta1 U1 small nuclear (sn) RNA chimeric hammerhead ribozymes in vitro. METHODS: TGFbeta1 partial gene fragment was cloned into T-vector at the downstream of T7 promoter. (32)p-labeled TGFbeta1 partial transcripts as target RNA were transcribed in vitro and purified by denaturing polyacrylamide gel electrophoresis (PAGE). Anti-TGFbeta1 ribozymes were designed by computer, then synthetic ribozyme fragments were cloned into the U1 ribozyme vector pZeoU1EcoSpe containing U1 snRNA promoter/enhancer and terminator. (32)p-labeled U1 snRNA chimeric ribozyme transcripts were gel-purified, incubated with target-RNAs at different conditions and autoradiographed after running denaturing PAGE. RESULTS: Active U1snRNA chimeric ribozyme (U1Rz803) had the best cleavage activity at 50 degrees; at 37 degrees, it was active, K(m)=34.48 nmol/L, K(cat)=0.14 min(-1); while the point mutant ribozyme U1Rz803(m) had no cleavage activity, so these indicated the design of U1Rz803 was correct. CONCLUSION: U1Rz803 prepared in this study possessed the perfect specific catalytic cleavage activity. These results indicate U1 snRNA chimeric ribozyme U1Rz803 may suppress the expression of TGFbeta1 in vivo, therefore it may provide a new avenue for the treatment of liver fibrosis in the future. Twit Text FOAVip Preparation and identification of anti-transforming growth factor beta1 U1 small nuclear RNA chimeric ribozyme in vitro ????World J Gastroenterol http://www.kidney.de/pget.php?&tw=1&pmid=12632521 #FOAvip Twit Text # Free Paper on # # # # # LINK http://www.kidney.de/pget.php?&tw=1&pmid=12632521 #FOAvip English Wikipedia <ref>{{Cite pmid|12632521 }}</ref> Preparation and identification of anti-transforming growth factor beta1 U1 small nuclear RNA chimeric ribozyme in vitro #MMPMID12632521 Lin JS ; Song YH ; Kong XJ ; Li B ; Liu NZ ; Wu XL ; Jin YX World J Gastroenterol 2003[Mar]; 9 (3 ): 572-7 PMID12632521 show ga AIM: To study the preparation and cleavage activity of anti-transforming growth factor (TGF)beta1 U1 small nuclear (sn) RNA chimeric hammerhead ribozymes in vitro. METHODS: TGFbeta1 partial gene fragment was cloned into T-vector at the downstream of T7 promoter. (32)p-labeled TGFbeta1 partial transcripts as target RNA were transcribed in vitro and purified by denaturing polyacrylamide gel electrophoresis (PAGE). Anti-TGFbeta1 ribozymes were designed by computer, then synthetic ribozyme fragments were cloned into the U1 ribozyme vector pZeoU1EcoSpe containing U1 snRNA promoter/enhancer and terminator. (32)p-labeled U1 snRNA chimeric ribozyme transcripts were gel-purified, incubated with target-RNAs at different conditions and autoradiographed after running denaturing PAGE. RESULTS: Active U1snRNA chimeric ribozyme (U1Rz803) had the best cleavage activity at 50 degrees; at 37 degrees, it was active, K(m)=34.48 nmol/L, K(cat)=0.14 min(-1); while the point mutant ribozyme U1Rz803(m) had no cleavage activity, so these indicated the design of U1Rz803 was correct. CONCLUSION: U1Rz803 prepared in this study possessed the perfect specific catalytic cleavage activity. These results indicate U1 snRNA chimeric ribozyme U1Rz803 may suppress the expression of TGFbeta1 in vivo, therefore it may provide a new avenue for the treatment of liver fibrosis in the future. |Animals [MESH] |Cell Line, Transformed [MESH] |Cloning, Molecular [MESH] |RNA, Catalytic/*pharmacology [MESH] |RNA, Small Nuclear/*pharmacology [MESH] |RNA/*drug effects [MESH] |Rats [MESH] |Recombinant Fusion Proteins/*pharmacology [MESH] |Transforming Growth Factor beta/*antagonists & inhibitors/*genetics [MESH]Preparation and identification of anti-transforming growth factor beta(epmc).pdf DeepDyve Pubget Overpricing