The Molecular Linker Archive
The Critical Intersection of PEG Linkers and Pharmacokinetics Engineering the Future of Targeted Therapy The primary goal of any drug delivery system is to maximize the concentration of the drug at the site of the disease while minimizing its presence in healthy tissue. In the realm of Antibody-Drug Conjugates (ADCs), this is a delicate dance between biology and chemistry. While the antibody provides the navigation, the linker provides the stability. Over the past decade, monodisperse PEG linkers have emerged as the gold standard for creating this stable bridge. The Hydration Shell and Systemic Solubility When we attach a cytotoxic payload to a protein, we are often introducing a highly hydrophobic (water-hating) element into a water-based system (the human bloodstream). This often leads to aggregation, where the drug molecules stick together and form clumps. These clumps are quickly identified by the immune system and cleared from the body, rendering the medicine useless. PEGylation t...
