Author Archives: Anissa Boumlic

The Effect of Benzonase Endonuclease Addition to Purification of Sabin Poliovirus Type 3

During production of vaccines and viral vectors, the size and quantity of extracellular nucleic acids must be reduced using endonuclease enzymes. Merck/MilliporeSigma’s proprietary Benzonase endonuclease is a genetically engineered nuclease derived from the Gram-negative bacteria Serratia marcescens. It attacks and degrades all forms of DNA and RNA. It is manufactured under good manufacturing practice (GMP) conditions and has a drug master file (MDF) in place with the US Food and Drug Administration (FDA), which can be cited in regulatory filings.…

Filter-Based Clarification of Viral Vaccines and Vectors

Viral vaccines rely on the antigen properties of a virus or virus-like entity to trigger an immune response and induce immune protection against a forthcoming viral infection. Through development of recombinant viral vaccines, developers can reduce risks associated with the presence of live and inactivated viruses. Instead, recombinant vaccines induce immunity against a pathogen by relying on the capacity of one or more antigens delivered by means of viral vectors or the baculovirus/plasmid system (1). Viral vaccines are formulated with…