A key innovation in Antibody-Drug Conjugates (ADCs) is the 'tandem cleave' linker. This technology requires two separate events—one in the tumor microenvironment and another after internalization—to release the payload, improving stability and reducing systemic toxicity.
Combining two payloads in an Antibody-Drug Conjugate (ADC) introduces a major risk: new, synergistic toxicities not seen with either agent alone. This complicates dose-finding and safety assessment, requiring developers to anticipate and monitor for entirely novel side effects.
The primary reason Antibody-Drug Conjugates (ADCs) stop working is payload resistance, a shift from the traditional belief that failure stems from tumors losing the target antigen. This insight drives development of multi-payload ADCs to overcome this resistance mechanism.
Previously underperforming cancer targets like TIGIT and LAG-3 are seeing renewed interest. Innovative antibody engineering, such as creating bispecific antibodies that target multiple pathways simultaneously, is giving these 'failed' targets new life and potential for clinical success.
Small biotechs must avoid becoming too attached to their initial lead compounds. They should adopt a 'first pancake' mindset, recognizing the first attempt may need to be discarded. This requires a professional, decision-driving approach over an emotional, project-tracking one.
A major source of unproductivity in drug development isn't the time spent reaching a clinical milestone. Instead, it's the 'white space' after data is received—the delay in analyzing results and making a firm go/no-go decision, which stalls the entire program.