PMID- 14644505 OWN - NLM STAT- MEDLINE DCOM- 20040217 LR - 20190708 IS - 0378-1119 (Print) IS - 0378-1119 (Linking) VI - 322 DP - 2003 Dec 11 TI - Chimeric transcriptional control units for improved liver-specific transgene expression. PG - 137-43 AB - Hepatocyte-directed delivery of therapeutic genes is a major field of gene therapy. An important issue in this context is the availability of promoters units providing for maximum transcriptional activity and specificity. Although a number of liver-specific promoters and transcriptional control elements have been identified and used for gene delivery, no systematic study has been performed to identify the best suitable combination of known liver-specific promoter and enhancer elements. We now report the results of a comparative investigation addressing this issue. We tested a total of 25 synthetic transcriptional control units consisting of either of the four core promoters from liver-specific genes linked in various combinations and configurations to hepatocyte-specific enhancer elements. These constructs were analyzed for transcriptional activity in different cell types in cell culture and in mouse liver in vivo. The data lead to the clear conclusion that a combination of the alcohol dehydrogenase 6 (ADH6) basal promoter linked to two tandem copies of an apoplipoprotein E enhancer element is the transcriptional control unit of choice for the liver-specific expression of transgenes. FAU - Gehrke, Stephan AU - Gehrke S AD - Institute of Molecular Biology and Tumor Research, Philipps-University, Emil-Mannkopff-Strasse 2, 35033 Marburg, Germany. FAU - Jerome, Valerie AU - Jerome V FAU - Muller, Rolf AU - Muller R LA - eng PT - Comparative Study PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - Netherlands TA - Gene JT - Gene JID - 7706761 RN - 0 (Recombinant Fusion Proteins) RN - 0 (alpha 1-Antitrypsin) RN - 9001-28-9 (Factor IX) RN - EC 1.1.1.1 (Alcohol Dehydrogenase) RN - EC 1.13.12.- (Luciferases) RN - EC 1.14.14.23 (Cholesterol 7-alpha-Hydroxylase) SB - IM MH - Alcohol Dehydrogenase/genetics MH - Animals MH - Cell Line, Tumor MH - Cholesterol 7-alpha-Hydroxylase/genetics MH - Enhancer Elements, Genetic/genetics MH - Factor IX/genetics MH - *Gene Expression Regulation MH - Humans MH - Injections, Intravenous MH - Liver/*metabolism MH - Luciferases/genetics/metabolism MH - Male MH - Mice MH - Mice, Inbred Strains MH - Mice, Nude MH - Plasmids/administration & dosage/genetics MH - Promoter Regions, Genetic/genetics MH - Recombinant Fusion Proteins/administration & dosage/genetics/*metabolism MH - Transcription, Genetic/genetics MH - Transfection MH - Transgenes/*genetics MH - alpha 1-Antitrypsin/genetics EDAT- 2003/12/04 05:00 MHDA- 2004/02/18 05:00 CRDT- 2003/12/04 05:00 PHST- 2003/12/04 05:00 [pubmed] PHST- 2004/02/18 05:00 [medline] PHST- 2003/12/04 05:00 [entrez] AID - S0378111903008709 [pii] AID - 10.1016/j.gene.2003.08.010 [doi] PST - ppublish SO - Gene. 2003 Dec 11;322:137-43. doi: 10.1016/j.gene.2003.08.010.