Antibody-drug conjugates, a well-established antitumor strategy, are used for targeted delivery of cytotoxic drugs through antibodies. As cancer research progresses, other technologies with different mechanisms are advancing in the oncologic pipeline. Researchers from Cybrexa Therapeutics Inc. presented new preclinical data on CBX-15, a peptide-drug conjugate (PDC) consisting of a pH-low insertion peptide (pHLIP) linked to monomethyl auristatin E (MMAE).
Avacta Life Sciences (Avacta Group plc) presented preclinical data on AVA-6103, a second-generation Precision peptide-drug conjugate, being developed for the potential treatment of cancer. AVA-6103 was developed using the company’s proprietary Precision technology incorporating a dipeptide specifically cleaved by fibroblast activation protein α (FAPα) leading to tumor-specific delivery of exatecan directly into the tumor cells.
Aposense Ltd. has prepared and tested peptide-drug conjugates comprising a cell-penetrating peptide covalently bound to the therapeutically affective amino acid sequence (SAPK1 [JNK] inhibitors) linked to sterol derivatives through a linker reported to be useful for the treatment of cancer.
Avacta Group plc has expanded its pipeline of Precision-enabled drug conjugates with the addition of two novel preclinical oncology assets, AVA-6103 and AVA-7100. The company’s peptide-drug conjugates (PDCs) comprise a payload linked to the Precision peptide, which is cleaved only within the tumor by the action of fibroblast activation protein (FAP).
Shanghai Micurx Pharmaceutical Co. Ltd. has discovered peptide-drug conjugates consisting of peptide-targeting kidney cells covalently linked to anti-inflammatory or immunomodulating or nephron-protective drugs through linkers reported to be useful for the treatment of acute kidney injury, nephritis, chronic kidney disease, chronic glomerulonephritis, diabetic nephropathy and systemic lupus erythematosus, among others.
Peptidream Inc. and Novartis Pharma AG have expanded their peptide-drug conjugate discovery collaboration announced in 2019, adding additional peptide radioligand therapies and other programs.
Peptidream Inc. announced a new multi-target collaboration and license agreement with Merck & Co. Inc., known as MSD outside the U.S. and Canada, as well as research collaboration and license agreement with Eli Lilly & Co (Lilly). Both agreements are focused on the discovery and development of novel peptide drug conjugates (PDCs). Under the agreement with MSD, Peptidream will provide peptide candidates identified from its proprietary Peptide Discovery Platform System (PDPS) technology for use as PDCs against targets of interest to MSD.
The high and specific expression of Kita-Kyushu lung cancer antigen 1 (KK-LC-1) in multiple types of tumors makes it an ideal target for drug delivery.
Oncopeptides AB remains on track for an NDA filing in the second quarter for its peptide-drug conjugate, melflufen, in relapsed refractory multiple myeloma (RRMM).