Abstract: Provided herein are methods of improving rAAV production in mammalian cells via the manipulation of a concentration of potassium chloride present in the media in which the mammalian cells are cultured and/or in which the rAAV particles are produced. The concentration of potassium chloride present in such media may be manipulated by, for example, supplementing a base medium with additional potassium chloride either before, at the same time as, or after the cells are contacted (e.g., infected) with one or more viral vectors (e.g., recombinant Herpes Simplex Virus (rHSV) vectors). Some embodiments of the present invention further contemplate supplementing the base medium with additional potassium chloride and sodium chloride in combination.

Abstract: Provided herein are nucleic acids, recombinant adeno-associated virus (rAAV) particles, and compositions, as well as methods of use thereof for transducing medullary thyroid carcinoma cells and in treatment of disease, such as medullary thyroid carcinoma. In some aspects, the nucleic acid comprises a truncated calcitonin promoter, which is optionally encapsidated within a rAAV particle. In other aspects, the rAAV particle is a rAAV particle having a mutation in a surface-exposed amino acid, such as tyrosine, threonine, or serine, that enhances transduction of the particle into medullary thyroid carcinoma cells.

Abstract: Provided herein are methods of improving rAAV production in cells, the method comprising increasing the salt concentration in the media in which the cells are infected or transfected, cultured, or in which they produce AAV. Aspects of the disclosure relate to improved methods of rAAV production by co-infecting suspension adapted cells (e.g., suspension adapted HEK293 cells) with viruses that encode one or more AAV components for producing rAAV particles within the suspension adapted cells.