Recombinant Adeno-Associated Virus Capsid Mutants for Enhanced Transduction of Therapeutic Genetic Material in the CNS


Executive Summary


The largest limiting factor in viral-mediated gene therapy is the efficacy of gene delivery to the target cells, which is dependent on the level of transduction. This becomes particularly important for therapies directly injected into the brain or central nervous system (CNS) as only a limited volume can be injected and the procedure is highly invasive. MSU researchers have engineered recombinant adeno-associated virus (rAAV2) mutant capsids that are more efficient at transduction of cells of the CNS, allowing for a more effective therapy.


Description of Technology


rAAV is the leading method of gene therapy for the CNS. Many clinical trials, however, have showed low efficacy due to insufficient viral transduction of neurons. The rAAV mutants developed at MSU show a markedly heightened transduction efficacy in the rat striatum and hippocampus. This transduction is enhanced 3-fold over the non-mutated rAAV capsid. These capsid mutants could be highly beneficial for improving transduction and gene delivery in the CNS, therefore providing more potent and efficacious therapies for diseases such as Parkinson’s, Alzheimer’s, and Huntington’s.


Key Benefits

  • More efficient gene transfer: improve effectiveness and dosing requirements
  • More efficacious and safe gene therapeutics: reduces the amount of therapeutic material necessary, reducing potential immune response
  • Long lasting therapeutic effectiveness



  • Gene therapy in the CNS
  • Research applications


Click Here to View a Poster on this Technology Presented by the Inventors


Patent Status: 


Under review.


Licensing Rights Available


Full licensing rights available.


Inventors: Fredric Manfredsson, Nicholas Kanaan


Tech ID: TEC2014-0056


Alternative contact due to temporary leave:


Nina (Isi) Davis, Technology Marketing Manager, email:, phone (direct): (517)884-1829. 


Patent Information:


For Information, Contact:

Randy Ramharack
Technology Manager
Michigan State University