AAV with ALB(1.4) promoter driven SEAP

This AAV expresses SEAP driven by a liver ALB(1.4) promoter.

The ALB(1.4) is a shorter version of the ALB(1.7) promoter with a total length of 1.4 Kb. In mouse liver cells, the transgene expression from this ALB(1.4) synthetic promoter is about 3 times lower than that of ALB(1.7) promoter but 10-100 fold greater than that of the CMV promoter 10-20 weeks after plasmid injection into mouse liver.

The SEAP reporter gene encodes a truncated form of the human placental alkaline phosphatase that lacks the membrane anchoring domain. Therefore, the protein can be efficiently secreted from transfected cells allowing for detection of reporter gene activity without cell lysis. Using a secreted reporter protein has several advantages over traditional reporter assays: 1) Cell lysis is not required for analysis so a single set of cells can be used for both the SEAP assay and another purpose; 2) Gene expression kinetics can be studied by the repeated collection of the culture medium from the same cultures; and 3) By changing the culture medium prior to an experiment, the assay background is reduced to an extremely low level.