Virus safety of a porcine-derived medical device: evaluation of a viral inactivation method

Biotechnology and Bioengineering
Jason Hodde, M C Hiles

Abstract

The goal of this study was to evaluate the efficacy of a virus-inactivating process for use during the preparation of porcine-derived extracellular matrix biomaterials for human clinical implantation. Porcine small intestine, the source material for the tissue-engineered, small intestinal submucosa (SIS) biomaterial, was evaluated. Relevant enveloped, non-enveloped, and model viruses representative of different virus families were included in the investigation: porcine parvovirus (PPV), porcine reovirus, murine leukemia retrovirus (LRV), and porcine pseudorabies (herpes) virus (PRV). Samples of small intestine were deliberately inoculated with approximately 1 x 10(7) plaque-forming units (PFU) of virus which were thereafter exposed to a 0.18% peracetic acid/4.8% aqueous ethanol mixture for time periods ranging from 5 minutes to 2 hours. Enveloped viruses were more easily inactivated than non-enveloped viruses, but material processed for 30 minutes or longer inactivated all of the viruses. D(10) values were calculated and used to extrapolate the extent of inactivation after 2 hours. Viral titers were reduced by more than 14.0 log(10) PPV, 21.0 log(10) reovirus, 40.0 log(10) PRV, and 27.0 log(10) LRV, meeting international standa...Continue Reading

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