A desirable monoclonal antibody, an effective cytotoxic drug, and a suitable linker make up antibody-drug conjugates (ADCs). A suitable linker between the antibody and the cytotoxic drug creates a clear bridge, enabling the antibody to precisely deliver the cytotoxic drug to tumor sites and deliver it only to tumor cells. In addition to conjugation, the linkers preserve the stability of ADCs during their preparation, storage, and systemic circulation phases.
The linkers found in the ADCs currently undergoing clinical evaluation are primarily divided into two groups: cleavable and noncleavable. Cleavable linkers rely on internal cellular mechanisms to release the toxin, such as cytoplasmic reduction, exposure to acidic conditions in the lysosome, or cleavage by particular cellular proteases. For the release of the cytotoxic molecule with noncleavable linkers, the antibody portion of the ADC must be broken down by proteolytic enzymes while retaining the linker and the amino acid by which it was attached to the antibody.
Based on knowledge of the internalization and breakdown of the antibody-target antigen complex and a comparison of the preclinical in vitro and in vivo activities of conjugates, the choice of linker depends on the target. Additionally, because each molecule has different chemical restrictions and frequently the drug structure lends itself to a particular linker, the choice of a linker is also influenced by the type of cytotoxin used.
Structure | Cat No. | Product Name | CAS No. | Product Description |
---|---|---|---|---|
V77884 | Ald-PEG23-SPDP | Ald-PEG23-SPDP is a cleavable ADC (Antibody-drug conjugate) linker containing 23 PEG (polyethylene glycol) units, which may be utilized to prepare active ADC molecules. | ||
V54570 | Ald-Ph-amido-C2-nitrate | 141534-26-1 | Ald-Ph-amido-C2-nitrate (Example XXIVb) is a non-cleavable (non-degradable) ADC linker that may be utilized to prepare active antibody conjugated molecules (ADC). | |
V54578 | Ald-Ph-amido-PEG1-C2-NHS ester | 2101206-80-6 | Ald-Ph-amido-PEG1-C2-NHS ester is a non-degradable linker containing 1 unit of PEG, which may be utilized to prepare active ADC molecules. | |
V54629 | Ald-Ph-amido-PEG1-C2-Pfp ester | 2101206-67-9 | Ald-Ph-amido-PEG1-C2-Pfp ester is a non-degradable linker containing 1 unit of PEG, which may be utilized to prepare ADC molecules. | |
V52740 | Ald-Ph-amido-PEG11-C2-NH2 | 1337889-01-6 | Ald-Ph-amido-PEG11-C2-NH2 is a non-cleavable (non-degradable) ADC linker containing 11 PEG (polyethylene glycol) units, which may be utilized to prepare active ADC molecules. | |
V52739 | Ald-Ph-amido-PEG11-NH-Boc | 1245813-70-0 | Ald-Ph-amido-PEG11-NH-Boc is a non-cleavable (non-degradable) ADC linker containing 11 PEG (polyethylene glycol) units, which may be utilized to prepare active ADC molecules. | |
V54614 | Ald-Ph-amido-PEG2 | 1061569-06-9 | Ald-Ph-amido-PEG2 is a non-cleavable (non-degradable) ADC linker containing 2 PEG (polyethylene glycol) units, which may be utilized to prepare active ADC molecules. | |
V54582 | Ald-Ph-amido-PEG2-C2-Pfp ester | 2101206-60-2 | Ald-Ph-amido-PEG2-C2-Pfp ester is a non-degradable linker containing 2 PEG (polyethylene glycol) units, which may be utilized to prepare active ADC molecules. | |
V54577 | Ald-Ph-amido-PEG3-C-COOH | 1007215-91-9 | Ald-Ph-amido-PEG3-C-COOH is a non-cleavable (non-degradable) linker for Antibody-drug conjugates (ADC). | |
V54531 | Ald-Ph-amido-PEG3-C1-Boc | 1007215-94-2 | Ald-Ph-amido-PEG3-C1-Boc is an ADC linker belonging to polyethylene glycol (PEG). | |
V54550 | Ald-Ph-amido-PEG3-C2-Pfp ester | 2101206-21-5 | Ald-Ph-amido-PEG3-C2-Pfp ester is a non-cleavable (non-degradable) ADC linker containing 3 PEG (polyethylene glycol) units, which may be utilized to prepare active ADC molecules. | |
V52738 | Ald-Ph-amido-PEG3-NHS ester | 2101206-32-8 | Ald-Ph-amido-PEG3-NHS ester is a non-cleavable (non-degradable) ADC linker containing 3 PEG (polyethylene glycol) units, which may be utilized to prepare active ADC molecules. | |
V52899 | Ald-Ph-NHS ester | 60444-78-2 | Ald-Ph-NHS ester is a non-degradable linker that may be utilized to prepare active antibody conjugate molecules (ADC). | |
V54691 | Alkyne Cholesterol | 1631985-09-5 | Alkyne Cholesterol is a modified lipid and a reagent for click chemistry containing an alkyne group. | |
V54579 | Alkyne-PEG2-iodide | 1234387-33-7 | Alkyne-PEG2-iodide is a reagent for click chemistry with terminal alkyne and iodinated alkyl groups. | |
V77274 | Alkyne-PEG5-SNAP | Alkyne-PEG5-SNAP is a chemical reagent containing an alkyne group. | ||
V54554 | Alkyne-SNAP | 1104822-07-2 | Alkyne-SNAP (compound 3) is an alkyne-coupled benzylguanine. | |
V54647 | Alkyne-SS-COOH | 2279938-29-1 | Alkyne-SS-COOH is a reagent for click chemistry containing an alkyne group. | |
V54585 | Aloc-D-Ala-Phe-Lys(Aloc)-PAB-PNP | 253863-34-2 | Aloc-D-Ala-Phe-Lys(Aloc)-PAB-PNP is a widely used cleavable (degradable) ADC (Antibody-drug conjugate) linker for Antibody-drug conjugates (ADCs). | |
V51402 | alpha-GalNAc-TEG-N3 | 882873-70-3 | click chemistry reagent |