| Autor: |
Lopes MM; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; IIIUC - Institute for Interdisciplinary Research, University of Coimbra., Lopes SM; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; IIIUC - Institute for Interdisciplinary Research, University of Coimbra., Baganha R; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; ViraVector - Viral Vectors for Gene Transfer Core Facility, University of Coimbra., Henriques C; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; FFUC - Faculty of Pharmacy, University of Coimbra., Silva AC; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; IIIUC - Institute for Interdisciplinary Research, University of Coimbra., Lobo DD; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; IIIUC - Institute for Interdisciplinary Research, University of Coimbra., Cortes L; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; IIIUC - Institute for Interdisciplinary Research, University of Coimbra; MICC-CNC - Microscopy Imaging Center of Coimbra - CNC, University of Coimbra., de Almeida LP; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; ViraVector - Viral Vectors for Gene Transfer Core Facility, University of Coimbra; FFUC - Faculty of Pharmacy, University of Coimbra; luispa@cnc.uc.pt., Nobre RJ; CNC-UC - Center for Neuroscience and Cell Biology, University of Coimbra; CIBB - Center for Innovative Biomedicine and Biotechnology, University of Coimbra; IIIUC - Institute for Interdisciplinary Research, University of Coimbra; ViraVector - Viral Vectors for Gene Transfer Core Facility, University of Coimbra; rui.nobre@cnc.uc.pt. |
| Abstrakt: |
Adeno-associated virus (AAV) has become an increasingly valuable vector for in vivo gene delivery and is currently undergoing human clinical trials. However, the commonly used methods to purify AAVs make use of cesium chloride or iodixanol density gradient ultracentrifugation. Despite their advantages, these methods are time-consuming, have limited scalability, and often result in vectors with low purity. To overcome these constraints, researchers are turning their attention to chromatography techniques. Here, we present an optimized heparin-based affinity chromatography protocol that serves as a universal capture step for the purification of AAVs. This method relies on the intrinsic affinity of AAV serotype 2 (AAV2) for heparan sulfate proteoglycans. Specifically, the protocol entails the co-transfection of plasmids encoding the desired AAV capsid proteins with those of AAV2, yielding mosaic AAV vectors that combine the properties of both parental serotypes. Briefly, after the lysis of producer cells, a mixture containing AAV particles is directly purified following an optimized single-step heparin affinity chromatography protocol using a standard fast protein liquid chromatography (FPLC) system. Purified AAV particles are subsequently concentrated and subjected to comprehensive characterization in terms of purity and biological activity. This protocol offers a simplified and scalable approach that can be performed without the need for ultracentrifugation and gradients, yielding clean and high viral titers. |
