The N-terminally hemagglutinin (HA)-tagged mouse FAAH cDNA with 4 additional amino acids (Glu-Phe-Asp-Asn) between HA and the first codon of FAAH was cloned into the adeno-associated virus (AAV) plasmid containing the cytomegalovirus enhancer/chicken ß-actin (CAG) promoter [20 (link)], the woodchuck hepatitis virus posttranscriptional regulatory element (WPRE), and the bovine growth hormone polyadenylation sequence (pA) flanked by AAV2 inverted terminal repeats. A transcriptional Stop cassette flanked by loxP sites was inserted downstream the CAG promoter to allow Cre recombinase-dependent transgene expression of HA-FAAH after injection into a Cre-expressing transgenic mouse line. Chimeric AAV serotype 1/2 vectors were produced and genomic titers determined using the Applied Biosystems ABI 7500 real time PCR cycler as described before [22 (link)].
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