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==== | ==CRYSTAL STRUCTURE OF HLA-A2-WT1-RMF AND FAB 11D06== | ||
<StructureSection load='7bbg' size='340' side='right'caption='[[7bbg]]' scene=''> | <StructureSection load='7bbg' size='340' side='right'caption='[[7bbg]], [[Resolution|resolution]] 2.64Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id= OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol= FirstGlance]. <br> | <table><tr><td colspan='2'>[[7bbg]] is a 5 chain structure with sequence from [https://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=7BBG OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=7BBG FirstGlance]. <br> | ||
</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7bbg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7bbg OCA], [https://pdbe.org/7bbg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7bbg RCSB], [https://www.ebi.ac.uk/pdbsum/7bbg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7bbg ProSAT]</span></td></tr> | </td></tr><tr id='method'><td class="sblockLbl"><b>[[Empirical_models|Method:]]</b></td><td class="sblockDat" id="methodDat">X-ray diffraction, [[Resolution|Resolution]] 2.64Å</td></tr> | ||
<tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=NA:SODIUM+ION'>NA</scene></td></tr> | |||
<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=7bbg FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=7bbg OCA], [https://pdbe.org/7bbg PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=7bbg RCSB], [https://www.ebi.ac.uk/pdbsum/7bbg PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=7bbg ProSAT]</span></td></tr> | |||
</table> | </table> | ||
<div style="background-color:#fffaf0;"> | |||
== Publication Abstract from PubMed == | |||
Antibody-based immunotherapy is a promising strategy for targeting chemoresistant leukemic cells. However, classical antibody-based approaches are restricted to targeting lineage-specific cell surface antigens. By targeting intracellular antigens, a large number of other leukemia-associated targets would become accessible. In this study, we evaluated a novel T-cell bispecific (TCB) antibody, generated by using CrossMAb and knob-into-holes technology, containing a bivalent T-cell receptor-like binding domain that recognizes the RMFPNAPYL peptide derived from the intracellular tumor antigen Wilms tumor protein (WT1) in the context of HLA-A*02. Binding to CD3epsilon recruits T cells irrespective of their T-cell receptor specificity. WT1-TCB elicited antibody-mediated T-cell cytotoxicity against AML cell lines in a WT1- and HLA-restricted manner. Specific lysis of primary acute myeloid leukemia (AML) cells was mediated in ex vivo long-term cocultures by using allogeneic (mean +/- standard error of the mean [SEM] specific lysis, 67 +/- 6% after 13-14 days; n = 18) or autologous, patient-derived T cells (mean +/- SEM specific lysis, 54 +/- 12% after 11-14 days; n = 8). WT1-TCB-treated T cells exhibited higher cytotoxicity against primary AML cells than an HLA-A*02 RMF-specific T-cell clone. Combining WT1-TCB with the immunomodulatory drug lenalidomide further enhanced antibody-mediated T-cell cytotoxicity against primary AML cells (mean +/- SEM specific lysis on days 3-4, 45.4 +/- 9.0% vs 70.8 +/- 8.3%; P = .015; n = 9-10). In vivo, WT1-TCB-treated humanized mice bearing SKM-1 tumors exhibited a significant and dose-dependent reduction in tumor growth. In summary, we show that WT1-TCB facilitates potent in vitro, ex vivo, and in vivo killing of AML cell lines and primary AML cells; these results led to the initiation of a phase 1 trial in patients with relapsed/refractory AML (#NCT04580121). | |||
Targeting intracellular WT1 in AML with a novel RMF-peptide-MHC-specific T-cell bispecific antibody.,Augsberger C, Hanel G, Xu W, Pulko V, Hanisch LJ, Augustin A, Challier J, Hunt K, Vick B, Rovatti PE, Krupka C, Rothe M, Schonle A, Sam J, Lezan E, Ducret A, Ortiz-Franyuti D, Walz AC, Benz J, Bujotzek A, Lichtenegger FS, Gassner C, Carpy A, Lyamichev V, Patel J, Konstandin N, Tunger A, Schmitz M, von Bergwelt-Baildon M, Spiekermann K, Vago L, Jeremias I, Marrer-Berger E, Umana P, Klein C, Subklewe M Blood. 2021 Dec 23;138(25):2655-2669. doi: 10.1182/blood.2020010477. PMID:34280257<ref>PMID:34280257</ref> | |||
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.<br> | |||
</div> | |||
<div class="pdbe-citations 7bbg" style="background-color:#fffaf0;"></div> | |||
==See Also== | |||
*[[Antibody 3D structures|Antibody 3D structures]] | |||
*[[Beta-2 microglobulin 3D structures|Beta-2 microglobulin 3D structures]] | |||
*[[MHC 3D structures|MHC 3D structures]] | |||
*[[MHC I 3D structures|MHC I 3D structures]] | |||
== References == | |||
<references/> | |||
__TOC__ | __TOC__ | ||
</StructureSection> | </StructureSection> | ||
[[Category: Homo sapiens]] | |||
[[Category: Large Structures]] | [[Category: Large Structures]] | ||
[[Category: | [[Category: Benz J]] | ||
[[Category: Bujotzek A]] | |||
[[Category: Georges G]] | |||
[[Category: Hanisch LJ]] | |||
[[Category: Klein C]] | |||
Latest revision as of 11:35, 17 October 2024
CRYSTAL STRUCTURE OF HLA-A2-WT1-RMF AND FAB 11D06CRYSTAL STRUCTURE OF HLA-A2-WT1-RMF AND FAB 11D06
Structural highlights
Publication Abstract from PubMedAntibody-based immunotherapy is a promising strategy for targeting chemoresistant leukemic cells. However, classical antibody-based approaches are restricted to targeting lineage-specific cell surface antigens. By targeting intracellular antigens, a large number of other leukemia-associated targets would become accessible. In this study, we evaluated a novel T-cell bispecific (TCB) antibody, generated by using CrossMAb and knob-into-holes technology, containing a bivalent T-cell receptor-like binding domain that recognizes the RMFPNAPYL peptide derived from the intracellular tumor antigen Wilms tumor protein (WT1) in the context of HLA-A*02. Binding to CD3epsilon recruits T cells irrespective of their T-cell receptor specificity. WT1-TCB elicited antibody-mediated T-cell cytotoxicity against AML cell lines in a WT1- and HLA-restricted manner. Specific lysis of primary acute myeloid leukemia (AML) cells was mediated in ex vivo long-term cocultures by using allogeneic (mean +/- standard error of the mean [SEM] specific lysis, 67 +/- 6% after 13-14 days; n = 18) or autologous, patient-derived T cells (mean +/- SEM specific lysis, 54 +/- 12% after 11-14 days; n = 8). WT1-TCB-treated T cells exhibited higher cytotoxicity against primary AML cells than an HLA-A*02 RMF-specific T-cell clone. Combining WT1-TCB with the immunomodulatory drug lenalidomide further enhanced antibody-mediated T-cell cytotoxicity against primary AML cells (mean +/- SEM specific lysis on days 3-4, 45.4 +/- 9.0% vs 70.8 +/- 8.3%; P = .015; n = 9-10). In vivo, WT1-TCB-treated humanized mice bearing SKM-1 tumors exhibited a significant and dose-dependent reduction in tumor growth. In summary, we show that WT1-TCB facilitates potent in vitro, ex vivo, and in vivo killing of AML cell lines and primary AML cells; these results led to the initiation of a phase 1 trial in patients with relapsed/refractory AML (#NCT04580121). Targeting intracellular WT1 in AML with a novel RMF-peptide-MHC-specific T-cell bispecific antibody.,Augsberger C, Hanel G, Xu W, Pulko V, Hanisch LJ, Augustin A, Challier J, Hunt K, Vick B, Rovatti PE, Krupka C, Rothe M, Schonle A, Sam J, Lezan E, Ducret A, Ortiz-Franyuti D, Walz AC, Benz J, Bujotzek A, Lichtenegger FS, Gassner C, Carpy A, Lyamichev V, Patel J, Konstandin N, Tunger A, Schmitz M, von Bergwelt-Baildon M, Spiekermann K, Vago L, Jeremias I, Marrer-Berger E, Umana P, Klein C, Subklewe M Blood. 2021 Dec 23;138(25):2655-2669. doi: 10.1182/blood.2020010477. PMID:34280257[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. See AlsoReferences
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