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Safra M, Werner L, Peres A, Polak P, Salamon N, Schvimer M, Weiss B, Barshack I, Shouval DS, Yaari G. A somatic hypermutation-based machine learning model stratifies individuals with Crohn's disease and controls. Genome Res 2023; 33:71-79. [PMID: 36526432 PMCID: PMC9977146 DOI: 10.1101/gr.276683.122] [Citation(s) in RCA: 1] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2022] [Accepted: 12/07/2022] [Indexed: 12/23/2022]
Abstract
Crohn's disease (CD) is a chronic relapsing-remitting inflammatory disorder of the gastrointestinal tract that is characterized by altered innate and adaptive immune function. Although massively parallel sequencing studies of the T cell receptor repertoire identified oligoclonal expansion of unique clones, much less is known about the B cell receptor (BCR) repertoire in CD. Here, we present a novel BCR repertoire sequencing data set from ileal biopsies from pediatric patients with CD and controls, and identify CD-specific somatic hypermutation (SHM) patterns, revealed by a machine learning (ML) algorithm trained on BCR repertoire sequences. Moreover, ML classification of a different data set from blood samples of adults with CD versus controls identified that V gene usage, clusters, or mutation frequencies yielded excellent results in classifying the disease (F1 > 90%). In summary, we show that an ML algorithm enables the classification of CD based on unique BCR repertoire features with high accuracy.
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Affiliation(s)
- Modi Safra
- The Alexander Kofkin Faculty of Engineering, Bar Ilan University, 5290002, Ramat Gan, Israel;,Bar Ilan Institute of Nanotechnology and Advanced Materials, Bar Ilan University, 5290002, Ramat Gan, Israel
| | - Lael Werner
- Institute of Gastroenterology, Nutrition and Liver Diseases, Schneider Children's Medical Center of Israel, Petah Tikva 4920235, Israel;,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Ayelet Peres
- The Alexander Kofkin Faculty of Engineering, Bar Ilan University, 5290002, Ramat Gan, Israel;,Bar Ilan Institute of Nanotechnology and Advanced Materials, Bar Ilan University, 5290002, Ramat Gan, Israel
| | - Pazit Polak
- The Alexander Kofkin Faculty of Engineering, Bar Ilan University, 5290002, Ramat Gan, Israel;,Bar Ilan Institute of Nanotechnology and Advanced Materials, Bar Ilan University, 5290002, Ramat Gan, Israel
| | - Naomi Salamon
- Pediatric Gastroenterology Unit, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Michael Schvimer
- Institute of Pathology, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Batia Weiss
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel;,Pediatric Gastroenterology Unit, Edmond and Lily Safra Children's Hospital, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Iris Barshack
- Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel;,Institute of Pathology, Sheba Medical Center, Ramat Gan 5262100, Israel
| | - Dror S. Shouval
- Institute of Gastroenterology, Nutrition and Liver Diseases, Schneider Children's Medical Center of Israel, Petah Tikva 4920235, Israel;,Sackler Faculty of Medicine, Tel Aviv University, Tel Aviv 6997801, Israel
| | - Gur Yaari
- The Alexander Kofkin Faculty of Engineering, Bar Ilan University, 5290002, Ramat Gan, Israel;,Bar Ilan Institute of Nanotechnology and Advanced Materials, Bar Ilan University, 5290002, Ramat Gan, Israel
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2
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Adaptive immune receptor repertoires, an overview of this exciting field. Immunol Lett 2020; 221:49-55. [PMID: 32113899 DOI: 10.1016/j.imlet.2020.02.013] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2019] [Revised: 02/19/2020] [Accepted: 02/26/2020] [Indexed: 12/30/2022]
Abstract
The adaptive immune response in jawed vertebrates relies on the huge diversity and specificity of the B cell and T cell antigen receptors, the immunoglobulins (IG) or antibodies and the T cell receptors (TR), respectively. The high level of diversity has represented a barrier to a comprehensive analysis of the adaptive immune response before the emergence of high-throughput sequencing (HTS) technologies. The size and complexity of HTS data requires the generation of novel computational and analytical approaches, which are transforming how the adaptive immune responses are deciphered to understand the clonal dynamics and properties of antigen-specific B and T cells in response to different kind of antigens. This exciting and rapidly evolving field is not only impacting human and clinical immunology but also comparative immunology. We are now closer to understanding the evolution of adaptive immune response in jawed vertebrates. This review provides an overview about classical and current strategies developed to assess the IG/TR diversity and their applications in basic and clinical immunology.
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Sethi MK, Thol F, Stadler M, Heuser M, Ganser A, Koenecke C, Pabst O. VH1 Family Immunoglobulin Repertoire Sequencing after Allogeneic Hematopoietic Stem Cell Transplantation. PLoS One 2017; 12:e0168096. [PMID: 28095438 PMCID: PMC5240918 DOI: 10.1371/journal.pone.0168096] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/13/2016] [Accepted: 11/24/2016] [Indexed: 01/18/2023] Open
Abstract
After allogeneic hematopoietic stem cell transplantation (HSCT), recovery of humoral immunity is essential to protect from life-threatening infections. However, monitoring the humoral immune system after transplantation with standard techniques in the clinical routine is imprecise. Here, we performed sequencing of mononuclear bone marrow cells to characterize the VH1-repertoire of switched B cells of healthy volunteers and patients undergoing HSCT. Analysis of healthy bone marrow donors and patients showed virtually no clonally related sequences between individuals. Interestingly, clonally related sequences were present in pre- and post-transplantation bone marrow of patients undergoing HSCT for acute myeloid leukemia treatment. We consistently observed such related B cell clones, irrespective of conditioning regimen, donor source or time post transplantation. In general, repertoire diversity was lower in post-HSCT as compared to pre-HSCT samples. However, post-HSCT repertoires retained highly mutated sequences, despite immunosuppressive therapy and presence of T cell deficiency after HSCT. These observations identify key properties of the recovering B cell compartment and provide a conceptual framework for the surveillance of humoral immunity after allogeneic transplantation.
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Affiliation(s)
- Maya K Sethi
- Institute of Immunology, Hannover Medical School, Hannover, Germany.,German Centre for Infection Research (DZIF), partner site Hannover-Braunschweig, Hannover, Germany
| | - Felicitas Thol
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Michael Stadler
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Michael Heuser
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Arnold Ganser
- Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Christian Koenecke
- Institute of Immunology, Hannover Medical School, Hannover, Germany.,Department of Hematology, Hemostasis, Oncology and Stem Cell Transplantation, Hannover Medical School, Hannover, Germany
| | - Oliver Pabst
- Institute of Immunology, Hannover Medical School, Hannover, Germany.,Institute of Molecular Medicine, RWTH Aachen, Aachen, Germany
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El Bannoudi H, Anquetil C, Braunstein MJ, Pond SLK, Silverman GJ. Unbiased RACE-Based Massive Parallel Surveys of Human IgA Antibody Repertoires. Methods Mol Biol 2017; 1643:45-73. [PMID: 28667529 DOI: 10.1007/978-1-4939-7180-0_5] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/02/2022]
Abstract
For investigations of human B-cell receptor (BCR) repertoires, we have developed a protocol for large-scale surveys of human antibody heavy chain (VH) rearrangements. Here we study IgA repertoires, as more IgA antibodies are synthesized in the human body on a daily level than all other isotypes combined. In fact, IgA is secreted at all mucosal surfaces, and it is also secreted in the perspiration that coats our cutaneous surfaces. In these studies we can characterize the IgA clonal diversity of B-cell populations obtained from any donor. To recover representative repertoire libraries, we make our libraries from antibody gene transcript templates (i.e., cDNA), as these are closer reflections of the immune repertoire expressed at the antibody protein level. To avoid biases potentially introduced by upstream oligonucleotide primers that hybridize to variable region framework regions, our approach also uses rapid amplification of cDNA ends (RACE) of antibody transcripts. For exploration of human IgA responses, we have designed a duplexing antisense constant region primer that efficiently amplifies, side-by-side, heavy chain transcripts of both the IgA1 and IgA2 subclasses. By these methods we have begun to define the molecular differences in the IgA1 and IgA2 responses occurring simultaneously in different donors. These methods will be used to investigate the effects of microbial virulence factors on host defenses, during autoimmune responses, and in B-cell malignancies.
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Affiliation(s)
- Hanane El Bannoudi
- Department of Medicine, NYU School of Medicine, 450 E. 29th Street, New York, NY, 10016, USA
| | - Céline Anquetil
- Department of Medicine, NYU School of Medicine, 450 E. 29th Street, New York, NY, 10016, USA
| | - Marc J Braunstein
- Department of Medicine, NYU School of Medicine, 450 E. 29th Street, New York, NY, 10016, USA
| | | | - Gregg J Silverman
- Department of Medicine, NYU School of Medicine, Alexandria Center for Life Science, 8th Floor, Rm 804, 450 E. 29th Street, New York, NY, 10016, USA.
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