AbbVie and ADARx Pharmaceuticals, a late clinical-stage biotechnology company developing next-generation RNA therapeutics, have signed a collaboration and license option agreement to develop small interfering RNA (siRNA) therapeutics across multiple disease areas, including neuroscience, immunology, and oncology.

siRNA represents a class of molecules capable of regulating gene expression and protein production. Unlike traditional modalities such as antibodies and small molecules, siRNA regulates the expression of genes. These molecules are designed to prevent the production of disease-causing proteins by targeting the messenger RNA (mRNA) that encodes for such proteins.

The strategic collaboration will leverage ADARx’s RNA discovery expertise and proprietary siRNA technology, which has the potential to enable sustained and precise mRNA silencing. AbbVie will contribute its expertise in antibody engineering, antibody drug conjugates (ADCs) and tissue delivery approaches as appropriate to augment ADARx’s discovery efforts.

“siRNA is a promising genetic medicine approach for silencing disease-causing genes, but challenges still remain in targeting and delivering siRNA effectively,” said Jonathon Sedgwick, Ph.D., senior vice president and global head, discovery research, AbbVie. “We are very pleased to collaborate with ADARx, leveraging their proprietary RNA technology alongside our antibody, ADC, and therapeutic area research and development expertise to bring siRNA forward as a potential novel therapeutic modality alongside our other established approaches.”

“This collaboration with AbbVie further validates the differentiated RNA technology that we have developed at ADARx and has the potential to unlock tremendous clinical and commercial potential across multiple disease areas. AbbVie’s research and development expertise combined with its global commercial reach make them the ideal strategic collaborator to accelerate these programs for the potential benefit of patients worldwide,” said Zhen Li, Ph.D., co-founder, president and CEO of ADARx.

Under the terms of the agreement, ADARx will receive a $335 million upfront payment and will be eligible to receive several billion dollars in additional contingent payments, including option-related fees and milestone payments, as well as tiered royalties.