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Encapsula/Immunodox®-PDP (PEGylated)/2-ml/IMD-1008

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IMD-1008

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During the past five decades, various types of chemistries have been used for conjugation of molecules such as antibodies, peptides, proteins or other reactive ligands to the surface of liposomes. In general, the conjugation can be achieved through the N-terminus, the C-terminus or the available sulfur (e.g. Fab’ fraction or thiolated antibodies). Not all chemistries have the same yield and efficiency of conjugation and often reproducing biocompatible batches can be a challenge.Copper-free click chemistry is a fairly new chemistry that has been commercialized during the past few years. More and more click chemistry-based reagents are becoming available commercially which makes the formulation development much easier for scientists. The great advantage of this chemistry is biocompatibility since no cytotoxic copper catalyst is required. By far, click chemistry is the most efficient and easiest conjugation chemistry available for coupling of antibodies and other reactive ligands to the surface of the liposomes. The conjugation chemistry is based on the reaction of the dibenzocyclooctyne (DBCO) reagent with an azide linker to form a stable triazole. DBCO moiety can be on the antibody and azide moiety can be on liposomes and vice versa. Here, azide moiety is on the liposome and DBCO moiety is on the antibody, protein or peptide.There are many commercialized reagents that can be used for DBCO modification of proteins, peptides and antibodies. To see the list of commercialized reagents for DBCO modification see here.Click Chemistry: Conjugation reaction between azide-containing doxorubicin liposome and DBCO-tagged antibody.Immunodox®-Azide is a PEGylated product. For other Immunodox® products suitable for other types conjugation methods see here.