PMID- 18701909 OWN - NLM STAT- MEDLINE DCOM- 20090706 LR - 20211020 IS - 1476-5462 (Electronic) IS - 0969-7128 (Print) IS - 0969-7128 (Linking) VI - 16 IP - 1 DP - 2009 Jan TI - Enhancing transduction of the liver by adeno-associated viral vectors. PG - 60-9 LID - 10.1038/gt.2008.137 [doi] AB - A number of distinct factors acting at different stages of the adeno-associated virus vector (AAV)-mediated gene transfer process were found to influence murine hepatocyte transduction. Foremost among these was the viral capsid protein. Self-complementary (sc) AAV pseudotyped with capsid from serotype 8 or rh.10 mediated fourfold greater hepatocyte transduction for a given vector dose when compared with vector packaged with AAV7 capsid. An almost linear relationship between vector dose and transgene expression was noted for all serotypes with vector doses as low as 1 x 10(7) vg per mouse (4 x 10(8) vg kg(-1)) mediating therapeutic levels of human FIX (hFIX) expression. Gender significantly influenced scAAV-mediated transgene expression, with twofold higher levels of expression observed in male compared with female mice. Pretreatment of mice with the proteasome inhibitor bortezomib increased scAAV-mediated hFIX expression from 4+/-0.6 to 9+/-2 microg ml(-1) in female mice, although the effect of this agent was less profound in males. Exposure of mice to adenovirus 10-20 weeks after gene transfer with AAV vectors augmented AAV transgene expression twofold by increasing the level of proviral mRNA. Hence, optimization of individual steps in the AAV gene transfer process can further enhance the potency of AAV-mediated transgene expression, thus increasing the probability of successful gene therapy. FAU - Nathwani, A C AU - Nathwani AC AD - Department of Haematology, UCL Cancer Institute, London, UK. a.nathwani@ucl.ac.uk FAU - Cochrane, M AU - Cochrane M FAU - McIntosh, J AU - McIntosh J FAU - Ng, C Y C AU - Ng CY FAU - Zhou, J AU - Zhou J FAU - Gray, J T AU - Gray JT FAU - Davidoff, A M AU - Davidoff AM LA - eng GR - R01 HL073838-04/HL/NHLBI NIH HHS/United States GR - DH_/Department of Health/United Kingdom GR - G0502121/MRC_/Medical Research Council/United Kingdom GR - HL073838/HL/NHLBI NIH HHS/United States GR - R01 HL073838/HL/NHLBI NIH HHS/United States GR - R01 HL094396/HL/NHLBI NIH HHS/United States PT - Comparative Study PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20080814 PL - England TA - Gene Ther JT - Gene therapy JID - 9421525 RN - 0 (Antibodies, Viral) RN - 0 (Boronic Acids) RN - 0 (Protease Inhibitors) RN - 0 (Pyrazines) RN - 0 (factor IX Long Beach) RN - 69G8BD63PP (Bortezomib) RN - 9001-28-9 (Factor IX) SB - IM MH - Animals MH - Antibodies, Viral/analysis MH - Boronic Acids/pharmacology MH - Bortezomib MH - Dependovirus/*genetics/immunology/metabolism MH - Factor IX/genetics/metabolism MH - Female MH - Gene Expression MH - Genetic Therapy/*methods MH - Genetic Vectors/*administration & dosage/genetics/immunology MH - Humans MH - Injections, Intravenous MH - Liver/immunology/*metabolism MH - Male MH - Mice MH - Mice, Inbred BALB C MH - Mice, Inbred C57BL MH - Protease Inhibitors/pharmacology MH - Pyrazines/pharmacology MH - Transduction, Genetic/*methods MH - Transgenes PMC - PMC2615795 MID - NIHMS71333 EDAT- 2008/08/15 09:00 MHDA- 2009/07/07 09:00 PMCR- 2009/07/01 CRDT- 2008/08/15 09:00 PHST- 2008/08/15 09:00 [pubmed] PHST- 2009/07/07 09:00 [medline] PHST- 2008/08/15 09:00 [entrez] PHST- 2009/07/01 00:00 [pmc-release] AID - gt2008137 [pii] AID - 10.1038/gt.2008.137 [doi] PST - ppublish SO - Gene Ther. 2009 Jan;16(1):60-9. doi: 10.1038/gt.2008.137. Epub 2008 Aug 14.