Abstract
Accurate adenovirus (Ad) quantification requires labor- and time-intensive viral stock purification. While crude viral lysates can be titered by plaque assay, this cell-based assay is neither rapid nor accurate. Consequently, a method for quantification of crude, unpurified viral culture lysates is needed. Given growing interest in alternative Ad serotypes (different from well-studied and characterized serotype Ad5) for basic research and for therapeutic applications, such a method should also apply to alternative serotypes. Using a Q Sepharose XL (QSXL) column-based method, we describe a robust quantification method resulting in efficient retention of viral particles of all serotypes, while non-viral components of crude infected cultures remain largely in the flow-through. The high-performance liquid chromatography-QSXL method allows rapid, accurate adenoviral quantification in crude lysates as well as identification of the various serotypes present in mixed-serotype crude lysates. We also report on conditions that efficiently strip and regenerate the column, extending its functional life.
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