Project description
Gene therapy for lung diseases
Surfactant protein B (SP-B) deficiency is a rare genetic disorder that causes severe respiratory distress in newborns and can lead to respiratory failure and death. Gene therapy approaches to replace the mutated gene have met technical challenges. The EU-funded BREATHE project aims to improve gene therapy approaches for SP-B deficiency through a modified mRNA delivery method that eliminates the risk of genomic integration associated with DNA-based vectors. Researchers will validate their approach in mouse models of the disease. Moreover, they will apply the same method for the therapy of cystic fibrosis, another genetic disease associated with thick, sticky mucus production in the lungs, inflammation, and recurrent infections.
Objective
Surfactant Protein B (SP-B) deficiency and Cystic Fibrosis (CF) are severe, fatal inherited diseases affecting the lungs of ten thousands of people, for which there is currently no available cure. Although gene therapy is a promising therapeutic approach, various technical problems, including numerous physical and immune-mediated barriers, have prevented successful application to date. My recent studies were the first to demonstrate the life-saving efficacy of repeated pulmonary delivery of chemically modified messenger RNA (mRNA) in a mouse model of congenital SP-B deficiency. By incorporating balanced amounts of modified nucleotides to mimic endogenous transcripts, I developed a safe and therapeutically efficient vehicle for lung transfection that eliminates the risk of genomic integration commonly associated with DNA-based vectors. I also assessed the delivery of mRNA-encoded site-specific nucleases to the lung to facilitate targeted gene correction of the underlying disease-causing mutations. In comprehensive studies, we show that a single application of nucleases encoded by nucleotide-modified RNA (nec-mRNA) can generate in vivo correction of terminally differentiated alveolar type II cells, which more than quadrupled the life span of SP-B deficient mice. Together with my working group, I aim to further develop this technology to enhance the efficiency and safety of nec-mRNA-mediated in vivo lung stem cell targeting, providing an ultimate cure by permanent correction. Specifically, we will test this approach in humanized mouse models of SP-B deficiency and CF. Developing and genetically engineering humanized models in vivo will be a critical step towards the safe translation of mRNA based nuclease technology to the clinic. With my competitive edge in lung-transfection technology and strong data, I feel that my group is uniquely suited to achieve these goals and to make a highly valuable contribution to the development of an efficient treatment.
Fields of science
- medical and health sciencesmedical biotechnologygenetic engineeringgene therapy
- medical and health sciencesmedical biotechnologycells technologiesstem cells
- natural sciencesbiological sciencesgeneticsmutation
- natural sciencesbiological sciencesgeneticsRNA
- engineering and technologynanotechnologynano-materials
Programme(s)
Topic(s)
Funding Scheme
ERC-STG - Starting GrantHost institution
72074 Tuebingen
Germany