PMID- 20393564 OWN - NLM STAT- MEDLINE DCOM- 20100602 LR - 20220318 IS - 1476-4687 (Electronic) IS - 0028-0836 (Linking) VI - 464 IP - 7291 DP - 2010 Apr 15 TI - Therapeutic antibody targeting of individual Notch receptors. PG - 1052-7 LID - 10.1038/nature08878 [doi] AB - The four receptors of the Notch family are widely expressed transmembrane proteins that function as key conduits through which mammalian cells communicate to regulate cell fate and growth. Ligand binding triggers a conformational change in the receptor negative regulatory region (NRR) that enables ADAM protease cleavage at a juxtamembrane site that otherwise lies buried within the quiescent NRR. Subsequent intramembrane proteolysis catalysed by the gamma-secretase complex liberates the intracellular domain (ICD) to initiate the downstream Notch transcriptional program. Aberrant signalling through each receptor has been linked to numerous diseases, particularly cancer, making the Notch pathway a compelling target for new drugs. Although gamma-secretase inhibitors (GSIs) have progressed into the clinic, GSIs fail to distinguish individual Notch receptors, inhibit other signalling pathways and cause intestinal toxicity, attributed to dual inhibition of Notch1 and 2 (ref. 11). To elucidate the discrete functions of Notch1 and Notch2 and develop clinically relevant inhibitors that reduce intestinal toxicity, we used phage display technology to generate highly specialized antibodies that specifically antagonize each receptor paralogue and yet cross-react with the human and mouse sequences, enabling the discrimination of Notch1 versus Notch2 function in human patients and rodent models. Our co-crystal structure shows that the inhibitory mechanism relies on stabilizing NRR quiescence. Selective blocking of Notch1 inhibits tumour growth in pre-clinical models through two mechanisms: inhibition of cancer cell growth and deregulation of angiogenesis. Whereas inhibition of Notch1 plus Notch2 causes severe intestinal toxicity, inhibition of either receptor alone reduces or avoids this effect, demonstrating a clear advantage over pan-Notch inhibitors. Our studies emphasize the value of paralogue-specific antagonists in dissecting the contributions of distinct Notch receptors to differentiation and disease and reveal the therapeutic promise in targeting Notch1 and Notch2 independently. FAU - Wu, Yan AU - Wu Y AD - Department of Antibody Engineering, Genentech, Inc., 1 DNA Way, South San Francisco, California 94080, USA. FAU - Cain-Hom, Carol AU - Cain-Hom C FAU - Choy, Lisa AU - Choy L FAU - Hagenbeek, Thijs J AU - Hagenbeek TJ FAU - de Leon, Gladys P AU - de Leon GP FAU - Chen, Yongmei AU - Chen Y FAU - Finkle, David AU - Finkle D FAU - Venook, Rayna AU - Venook R FAU - Wu, Xiumin AU - Wu X FAU - Ridgway, John AU - Ridgway J FAU - Schahin-Reed, Dorreyah AU - Schahin-Reed D FAU - Dow, Graham J AU - Dow GJ FAU - Shelton, Amy AU - Shelton A FAU - Stawicki, Scott AU - Stawicki S FAU - Watts, Ryan J AU - Watts RJ FAU - Zhang, Jeff AU - Zhang J FAU - Choy, Robert AU - Choy R FAU - Howard, Peter AU - Howard P FAU - Kadyk, Lisa AU - Kadyk L FAU - Yan, Minhong AU - Yan M FAU - Zha, Jiping AU - Zha J FAU - Callahan, Christopher A AU - Callahan CA FAU - Hymowitz, Sarah G AU - Hymowitz SG FAU - Siebel, Christian W AU - Siebel CW LA - eng SI - PDB/3L95 PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, U.S. Gov't, Non-P.H.S. PL - England TA - Nature JT - Nature JID - 0410462 RN - 0 (Angiogenesis Inhibitors) RN - 0 (Antibodies) RN - 0 (NOTCH1 protein, human) RN - 0 (NOTCH2 protein, human) RN - 0 (Notch1 protein, mouse) RN - 0 (Notch2 protein, mouse) RN - 0 (Peptide Library) RN - 0 (Receptor, Notch1) RN - 0 (Receptor, Notch2) RN - 0 (Receptors, Notch) SB - IM CIN - Nat Rev Drug Discov. 2010 Jun;9(6):431. PMID: 20514065 MH - Angiogenesis Inhibitors/immunology/pharmacology/therapeutic use MH - Animals MH - Antibodies/adverse effects/immunology/*pharmacology/*therapeutic use MH - Antibody Specificity/immunology MH - Cell Line, Tumor MH - Cell Proliferation/drug effects MH - Goblet Cells/drug effects/pathology MH - Humans MH - Mice MH - Mice, Inbred BALB C MH - NIH 3T3 Cells MH - Neoplasms/blood supply/*drug therapy/*metabolism/pathology MH - Neovascularization, Pathologic/drug therapy MH - Peptide Library MH - Precursor T-Cell Lymphoblastic Leukemia-Lymphoma/drug therapy/metabolism/pathology MH - Receptor, Notch1/antagonists & inhibitors/immunology MH - Receptor, Notch2/antagonists & inhibitors/immunology MH - Receptors, Notch/*antagonists & inhibitors/genetics/immunology/metabolism MH - Signal Transduction/drug effects EDAT- 2010/04/16 06:00 MHDA- 2010/06/03 06:00 CRDT- 2010/04/16 06:00 PHST- 2009/06/30 00:00 [received] PHST- 2010/01/28 00:00 [accepted] PHST- 2010/04/16 06:00 [entrez] PHST- 2010/04/16 06:00 [pubmed] PHST- 2010/06/03 06:00 [medline] AID - nature08878 [pii] AID - 10.1038/nature08878 [doi] PST - ppublish SO - Nature. 2010 Apr 15;464(7291):1052-7. doi: 10.1038/nature08878.