PMID- 29661776 OWN - NLM STAT- MEDLINE DCOM- 20191220 LR - 20200502 IS - 1557-3265 (Electronic) IS - 1078-0432 (Linking) VI - 24 IP - 14 DP - 2018 Jul 15 TI - Targeting the Leukemia Antigen PR1 with Immunotherapy for the Treatment of Multiple Myeloma. PG - 3386-3396 LID - 10.1158/1078-0432.CCR-17-2626 [doi] AB - Purpose: PR1 is a human leukocyte antigen (HLA)-A2 nonameric peptide derived from neutrophil elastase (NE) and proteinase 3 (P3). We have previously shown that PR1 is cross-presented by solid tumors, leukemia, and antigen-presenting cells, including B cells. We have also shown that cross-presentation of PR1 by solid tumors renders them susceptible to killing by PR1-targeting immunotherapies. As multiple myeloma is derived from B cells, we investigated whether multiple myeloma is also capable of PR1 cross-presentation and subsequently capable of being targeted by using PR1 immunotherapies.Experimental Design: We tested whether multiple myeloma is capable of cross-presenting PR1 and subsequently becomes susceptible to PR1-targeting immunotherapies, using multiple myeloma cell lines, a xenograft mouse model, and primary multiple myeloma patient samples.Results: Here we show that multiple myeloma cells lack endogenous NE and P3, are able to take up exogenous NE and P3, and cross-present PR1 on HLA-A2. Cross-presentation by multiple myeloma utilizes the conventional antigen processing machinery, including the proteasome and Golgi, and is not affected by immunomodulating drugs (IMiD). Following PR1 cross-presentation, we are able to target multiple myeloma with PR1-CTL and anti-PR1/HLA-A2 antibody both in vitro and in vivoConclusions: Collectively, our data demonstrate that PR1 is a novel tumor-associated antigen target in multiple myeloma and that multiple myeloma is susceptible to immunotherapies that target cross-presented antigens. Clin Cancer Res; 24(14); 3386-96. (c)2018 AACR. CI - (c)2018 American Association for Cancer Research. FAU - Alatrash, Gheath AU - Alatrash G AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. galatras@mdanderson.org jmolldre@mdanderson.org. FAU - Perakis, Alexander A AU - Perakis AA AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Kerros, Celine AU - Kerros C AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Peters, Haley L AU - Peters HL AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Sukhumalchandra, Pariya AU - Sukhumalchandra P AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Zhang, Mao AU - Zhang M AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Jakher, Haroon AU - Jakher H AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Zope, Madhushree AU - Zope M AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Patenia, Rebecca AU - Patenia R AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Sergeeva, Anna AU - Sergeeva A AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Yi, Shuhua AU - Yi S AD - Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Young, Ken H AU - Young KH AD - Department of Hematopathology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Philips, Anne V AU - Philips AV AD - Department of Breast Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Cernosek, Amanda M AU - Cernosek AM AUID- ORCID: 0000-0002-3912-5068 AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Garber, Haven R AU - Garber HR AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Qiao, Na AU - Qiao N AD - Department of Breast Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Weng, Jinsheng AU - Weng J AD - Department of Lymphoma/Myeloma, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - St John, Lisa S AU - St John LS AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Lu, Sijie AU - Lu S AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Clise-Dwyer, Karen AU - Clise-Dwyer K AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Mittendorf, Elizabeth A AU - Mittendorf EA AD - Department of Breast Surgical Oncology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Ma, Qing AU - Ma Q AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. FAU - Molldrem, Jeffrey J AU - Molldrem JJ AUID- ORCID: 0000-0003-1196-1715 AD - Department of Stem Cell Transplantation and Cellular Therapy, Section of Transplant Immunology, The University of Texas MD Anderson Cancer Center, Houston, Texas. galatras@mdanderson.org jmolldre@mdanderson.org. LA - eng GR - P50 CA142509/CA/NCI NIH HHS/United States GR - T32 CA009598/CA/NCI NIH HHS/United States PT - Journal Article PT - Research Support, N.I.H., Extramural PT - Research Support, Non-U.S. Gov't DEP - 20180416 PL - United States TA - Clin Cancer Res JT - Clinical cancer research : an official journal of the American Association for Cancer Research JID - 9502500 RN - 0 (Antineoplastic Agents, Immunological) RN - 0 (HLA-A2 Antigen) RN - 0 (Immunologic Factors) RN - 0 (Peptide Fragments) RN - EC 3.4.25.1 (Proteasome Endopeptidase Complex) SB - IM MH - Animals MH - Antigen Presentation/drug effects/immunology MH - Antigen-Presenting Cells/immunology MH - Antineoplastic Agents, Immunological/*pharmacology MH - Biological Transport MH - Cell Line, Tumor MH - Complement Activation MH - Cross-Priming/drug effects/immunology MH - Cytotoxicity, Immunologic MH - Disease Models, Animal MH - HLA-A2 Antigen/chemistry/*immunology/metabolism MH - Humans MH - Immunologic Factors/pharmacology MH - Immunomodulation/drug effects MH - Mice MH - Multiple Myeloma/drug therapy/*immunology/metabolism/pathology MH - Peptide Fragments/*antagonists & inhibitors/*immunology MH - Proteasome Endopeptidase Complex/metabolism MH - T-Lymphocytes, Cytotoxic/immunology/metabolism MH - Xenograft Model Antitumor Assays EDAT- 2018/04/18 06:00 MHDA- 2019/12/21 06:00 CRDT- 2018/04/18 06:00 PHST- 2017/09/11 00:00 [received] PHST- 2018/02/19 00:00 [revised] PHST- 2018/04/10 00:00 [accepted] PHST- 2018/04/18 06:00 [pubmed] PHST- 2019/12/21 06:00 [medline] PHST- 2018/04/18 06:00 [entrez] AID - 1078-0432.CCR-17-2626 [pii] AID - 10.1158/1078-0432.CCR-17-2626 [doi] PST - ppublish SO - Clin Cancer Res. 2018 Jul 15;24(14):3386-3396. doi: 10.1158/1078-0432.CCR-17-2626. Epub 2018 Apr 16.