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Guided tissue regeneration: porcine matrix does not transmit PERV.
Klaus Kallenbach1, Rainer G Leyh, Elena Lefik
1Department of Thoracic and Cardiovascular Surgery, Hennover Medical School, Carl-Neuberg-Strasse 1, 30623 Hannover, Germany. kallenbach@thg.mh-hannover.de
Biomaterials
|March 17, 2004
Summary
Acellularized porcine vascular scaffolds regenerate into functional vessels in sheep without transmitting porcine endogenous retrovirus (PERV). This study confirms the safety of these scaffolds for cardiovascular tissue engineering, mitigating cross-species infection risks.
Area of Science:
- Cardiovascular tissue engineering
- Xenotransplantation research
- Virology and infectious disease
Background:
- Acellularized porcine matrices are promising for cardiovascular tissue engineering.
- Concerns exist regarding potential cross-species transmission of porcine endogenous retrovirus (PERV).
Purpose of the Study:
- To investigate the risk of PERV transmission from acellularized porcine vascular scaffolds in a xenogenic model.
- To evaluate the safety and efficacy of these scaffolds in vivo.
Main Methods:
- Porcine pulmonary arteries were acellularized and implanted into sheep.
- Regular blood and tissue sample analysis for PERV using PCR and RT-PCR.
- Histology and electron microscopy for graft characterization.
Main Results:
- Acellularized scaffolds were repopulated by host cells, forming structured vessels.
- No PERV sequences were detected in host blood or graft tissues up to 12 months.
- Electron microscopy confirmed no signs of retroviral infection.
Conclusions:
- Guided tissue regeneration of acellularized porcine vascular scaffolds results in functional vessels.
- These scaffolds can be used in cardiovascular applications without PERV transmission risk.