CHIMERIC ANTIGEN RECEPTOR SPACERS

Mon, 13 Apr 2026 10:59:19 +0000
Intellectual Property

The USPTO published Lyell Immunopharma's patent application US20260098075A1 for chimeric antigen receptors (CARs) incorporating immunoglobulin-derived spacers, such as hinge or loop regions, designed to enhance cytokine release compared to CARs with non-Ig-derived spacers. The spacers may be derived from human immunoglobulins (IgAQ1, IgA2, IgD, IgE, IgG1-4, IgM) or non-human sources (e.g., mouse IgG2A), and may be configured as modular constructs combining multiple Ig hinges or fragments thereof. Filed September 8, 2025.