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J Virol Methods. 2006 Sep;136(1-2):277-82. Epub 2006 Jul 3.

Serotype-specific detection of adeno-associated virus during laboratory preparation.

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Institute of Molecular Biophysics, Kasha Laboratory of Molecular Biophysics, Florida State University, Tallahassee, FL 32306-4381, USA.


Adeno-associated virus (AAV) is a small single-stranded DNA member of the family Parvoviradae with at least eight recognized human serotypes, several of which are being studied as candidate vectors for gene therapy. When multiple serotypes are handled in the same laboratory, it is critical to know the serotype of a sample with certainty. Here, a rapid and reliable PCR-based method is presented for the identification of serotypes 2, 3B or 6 and for screening for cross contamination. The PCR assay is based on the use of differentially annealing, serotype-specific primer pairs targeted to the hypervariable regions of the capsid coding region of the AAV genome. Identity is determined by the presence of a PCR product of size specific to each serotype. Multiplexing the reaction allows all serotypes to be queried in a single reaction tube and greatly diminishes the presence of false positives. The method is capable of detecting as little as 25 fg of a contaminating serotype and is potentially extensible to other AAV serotypes.

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