Miho, Enkelejda
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Kidins220 regulates the development of B cells bearing the λ light chain
2024-01-25, Schaffer, Anna-Maria, Fiala, Gina Jasmin, Hils, Miriam, Natali, Eriberto, Babrak, Lmar, Herr, Laurenz Alexander, Romero-Mulero, Mari Carmen, Cabezas-Wallscheid, Nina, Rizzi, Marta, Miho, Enkelejda, Schamel, Wolfgang W.A., Minguet, Susana
The ratio between κ and λ light chain (LC)-expressing B cells varies considerably between species. We recently identified Kinase D-interacting substrate of 220 kDa (Kidins220) as an interaction partner of the BCR. In vivo ablation of Kidins220 in B cells resulted in a marked reduction of λLC-expressing B cells. Kidins220 knockout B cells fail to open and recombine the genes of the Igl locus, even in genetic scenarios where the Igk genes cannot be rearranged or where the κLC confers autoreactivity. Igk gene recombination and expression in Kidins220-deficient B cells is normal. Kidins220 regulates the development of λLC B cells by enhancing the survival of developing B cells and thereby extending the time-window in which the Igl locus opens and the genes are rearranged and transcribed. Further, our data suggest that Kidins220 guarantees optimal pre-BCR and BCR signaling to induce Igl locus opening and gene recombination during B cell development and receptor editing.
Unconstrained generation of synthetic antibody–antigen structures to guide machine learning methodology for antibody specificity prediction
2022-12-19, Robert, Philippe A., Akbar, Rahmad, Frank, Robert, Pavlović, Milena, Widrich, Michael, Snapkov, Igor, Slabodkin, Andrei, Chernigovskaya, Maria, Scheffer, Lonneke, Smorodina, Eva, Rawat, Puneet, Mehta, Brij Bhushan, Vu, Mai Ha, Mathisen, Ingvild Frøberg, Prósz, Aurél, Abram, Krzysztof, Olar, Alex, Miho, Enkelejda, Haug, Dag Trygve Tryslew, Lund-Johansen, Fridtjof, Hochreiter, Sepp, Haff, Ingrid Hobæk, Klambauer, Günter, Sandve, Geir Kjetil, Greiff, Victor
Machine learning (ML) is a key technology for accurate prediction of antibody–antigen binding. Two orthogonal problems hinder the application of ML to antibody-specificity prediction and the benchmarking thereof: the lack of a unified ML formalization of immunological antibody-specificity prediction problems and the unavailability of large-scale synthetic datasets to benchmark real-world relevant ML methods and dataset design. Here we developed the Absolut! software suite that enables parameter-based unconstrained generation of synthetic lattice-based three-dimensional antibody–antigen-binding structures with ground-truth access to conformational paratope, epitope and affinity. We formalized common immunological antibody-specificity prediction problems as ML tasks and confirmed that for both sequence- and structure-based tasks, accuracy-based rankings of ML methods trained on experimental data hold for ML methods trained on Absolut!-generated data. The Absolut! framework has the potential to enable real-world relevant development and benchmarking of ML strategies for biotherapeutics design.
Sequencing of the M protein. Toward personalized medicine in monoclonal gammopathies
2022-08-23, Cascino, Pasquale, Nevone, Alice, Piscitelli, Maggie, Scopelliti, Claudia, Girelli, Maria, Mazzini, Giulia, Caminito, Serena, Russo, Giancarlo, Milani, Paolo, Basset, Marco, Foli, Andrea, Fazio, Francesca, Casarini, Simona, Massa, Margherita, Bozzola, Margherita, Ripepi, Jessica, Sesta, Melania Antonietta, Acquafredda, Gloria, De Cicco, Marica, Moretta, Antonia, Rognoni, Paola, Milan, Enrico, Ricagno, Stefano, Lavatelli, Francesca, Petrucci, Maria Teresa, Klersy, Catherine, Merlini, Giampaolo, Palladini, Giovanni, Nuvolone, Mario, Miho, Enkelejda
Each patient with a monoclonal gammopathy has a unique monoclonal (M) protein, whose sequence can be used as a tumoral fingerprint to track the presence of the B cell or plasma cell (PC) clone itself. Moreover, the M protein can directly cause potentially life-threatening organ damage, which is dictated by the specific, patient's unique clonal light and/or heavy chain amino acid sequence, as in patients affected by immunoglobulin light chain (AL) amyloidosis.1 However, patients' specific M protein sequences remain mostly undefined and molecular mechanisms underlying M protein-related clinical manifestations are largely obscure.
In silico proof of principle of machine learning-based antibody design at unconstrained scale
2022-04-04, Akbar, Rahmad, Robert, Philippe A., Weber, Cédric R., Widrich, Michael, Frank, Robert, Pavlović, Milena, Scheffer, Lonneke, Chernigovskaya, Maria, Snapkov, Igor, Slabodkin, Andrei, Mehta, Brij Bhushan, Miho, Enkelejda, Lund-Johansen, Fridtjof, Andersen, Jan Terje, Hochreiter, Sepp, Hobæk Haff, Ingrid, Klambauer, Günter, Sandve, Geir Kjetil, Greiff, Victor
Generative machine learning (ML) has been postulated to become a major driver in the computational design of antigen-specific monoclonal antibodies (mAb). However, efforts to confirm this hypothesis have been hindered by the infeasibility of testing arbitrarily large numbers of antibody sequences for their most critical design parameters: paratope, epitope, affinity, and developability. To address this challenge, we leveraged a lattice-based antibody-antigen binding simulation framework, which incorporates a wide range of physiological antibody-binding parameters. The simulation framework enables the computation of synthetic antibody-antigen 3D-structures, and it functions as an oracle for unrestricted prospective evaluation and benchmarking of antibody design parameters of ML-generated antibody sequences. We found that a deep generative model, trained exclusively on antibody sequence (one dimensional: 1D) data can be used to design conformational (three dimensional: 3D) epitope-specific antibodies, matching, or exceeding the training dataset in affinity and developability parameter value variety. Furthermore, we established a lower threshold of sequence diversity necessary for high-accuracy generative antibody ML and demonstrated that this lower threshold also holds on experimental real-world data. Finally, we show that transfer learning enables the generation of high-affinity antibody sequences from low-N training data. Our work establishes a priori feasibility and the theoretical foundation of high-throughput ML-based mAb design.
The dengue-specific immune response and antibody identification with machine learning
2024-01-20, Natali, Eriberto Noel, Horst, Alexander, Meier, Patrick, Greiff, Victor, Nuvolone, Mario, Babrak, Lmar Marie, Fink, Katja, Miho, Enkelejda
Dengue virus poses a serious threat to global health and there is no specific therapeutic for it. Broadly neutralizing antibodies recognizing all serotypes may be an effective treatment. High-throughput adaptive immune receptor repertoire sequencing (AIRR-seq) and bioinformatic analysis enable in-depth understanding of the B-cell immune response. Here, we investigate the dengue antibody response with these technologies and apply machine learning to identify rare and underrepresented broadly neutralizing antibody sequences. Dengue immunization elicited the following signatures on the antibody repertoire: (i) an increase of CDR3 and germline gene diversity; (ii) a change in the antibody repertoire architecture by eliciting power-law network distributions and CDR3 enrichment in polar amino acids; (iii) an increase in the expression of JNK/Fos transcription factors and ribosomal proteins. Furthermore, we demonstrate the applicability of computational methods and machine learning to AIRR-seq datasets for neutralizing antibody candidate sequence identification. Antibody expression and functional assays have validated the obtained results.
Unconstrained generation of synthetic antibody–antigen structures to guide machine learning methodology for antibody specificity prediction
2022-12-19, Robert, Philippe A., Akbar, Rahmad, Pavlović, Milena, Widrich, Michael, Snapkov, Igor, Slabodkin, Andrei, Chernigovskaya, Maria, Scheffer, Lonneke, Smorodina, Eva, Rawat, Puneet, Mehta, Brij Bhushan, Vu, Mai Ha, Mathisen, Ingvild Frøberg, Prósz, Aurél, Abram, Krzysztof, Olar, Axel, Miho, Enkelejda, Haug, Dag Trygve Tryslew, Lund-Johansen, Fridtjof, Hochreiter, Sepp, Hobæk Haff, Ingrid, Klambauer, Günter, Sandve, Geir Kjetil, Greiff, Victor
Machine learning (ML) is a key technology for accurate prediction of antibody–antigen binding. Two orthogonal problems hinder the application of ML to antibody-specificity prediction and the benchmarking thereof: the lack of a unified ML formalization of immunological antibody-specificity prediction problems and the unavailability of large-scale synthetic datasets to benchmark real-world relevant ML methods and dataset design. Here we developed the Absolut! software suite that enables parameter-based unconstrained generation of synthetic lattice-based three-dimensional antibody–antigen-binding structures with ground-truth access to conformational paratope, epitope and affinity. We formalized common immunological antibody-specificity prediction problems as ML tasks and confirmed that for both sequence- and structure-based tasks, accuracy-based rankings of ML methods trained on experimental data hold for ML methods trained on Absolut!-generated data. The Absolut! framework has the potential to enable real-world relevant development and benchmarking of ML strategies for biotherapeutics design.
Single-molecule real-time sequencing of the M protein.Toward personalized medicine in monoclonal gammopathies
2022-08-05, Cascino, Pasquale, Nevone, Alice, Piscitelli, Maggie, Scopelliti, Claudia, Girelli, Maria, Mazzini, Giulia, Caminito, Serena, Russo, Giancarlo, Milani, Paolo, Basset, Marco, Foli, Andrea, Fazio, Francesca, Casarini, Simona, Massa, Margherita, Bozzola, Margherita, Ripepi, Jessica, Sesta, Melania Antonietta, Acquafredda, Gloria, De Cicco, Marica, Moretta, Antonia, Rognoni, Paola, Milan, Enrico, Ricagno, Stefano, Lavatelli, Francesca, Petrucci, Maria Teresa, Miho, Enkelejda, Klersy, Catherine, Merlini, Giampaolo, Palladini, Giovanni, Nuvolone, Mario
Author Correction. The dengue-specific immune response and antibody identification with machine learning
2024-01-20, Natali, Eriberto Noel, Horst, Alexander, Meier, Patrick, Greiff, Victor, Nuvolone, Mario, Babrak, Lmar Marie, Fink, Katja, Miho, Enkelejda
Dengue virus poses a serious threat to global health and there is no specific therapeutic for it. Broadly neutralizing antibodies recognizing all serotypes may be an effective treatment. High-throughput adaptive immune receptor repertoire sequencing (AIRR-seq) and bioinformatic analysis enable in-depth understanding of the B-cell immune response. Here, we investigate the dengue antibody response with these technologies and apply machine learning to identify rare and underrepresented broadly neutralizing antibody sequences. Dengue immunization elicited the following signatures on the antibody repertoire: (i) an increase of CDR3 and germline gene diversity; (ii) a change in the antibody repertoire architecture by eliciting power-law network distributions and CDR3 enrichment in polar amino acids; (iii) an increase in the expression of JNK/Fos transcription factors and ribosomal proteins. Furthermore, we demonstrate the applicability of computational methods and machine learning to AIRR-seq datasets for neutralizing antibody candidate sequence identification. Antibody expression and functional assays have validated the obtained results.
RWD-Cockpit. Application for quality assessment of real-world data
2022-10-18, Degen, Markus, Babrak, Lmar, Smakaj, Erand, Agac, Teyfik, Asprion, Petra, Grimberg, Frank, Van der Werf, Daan, Van Ginkel, Erwin Willem, Tosoni, Deniz David, Clay, Ieuan, Brodbeck, Dominique, Natali, Eriberto, Schkommodau, Erik, Miho, Enkelejda
Digital technologies are transforming the health care system. A large part of information is generated as real-world data (RWD). Data from electronic health records and digital biomarkers have the potential to reveal associations between the benefits and adverse events of medicines, establish new patient-stratification principles, expose unknown disease correlations, and inform on preventive measures. The impact for health care payers and providers, the biopharmaceutical industry, and governments is massive in terms of health outcomes, quality of care, and cost. However, a framework to assess the preliminary quality of RWD is missing, thus hindering the conduct of population-based observational studies to support regulatory decision-making and real-world evidence.
Adaptive immune receptor repertoire (AIRR) community guide to TR and IG gene annotation
2022-05-28, Babrak, Lmar, Marquez, Susanna, Busse, Christian, Lees, William, Miho, Enkelejda, Ohlin, Mats, Rosenfeld, Aaron, Stervbo, Ulrik, Watson, Corey, Schramm, Chaim, Langerak, Anton W.
High-throughput sequencing of adaptive immune receptor repertoires (AIRR, i.e., IG and TR) has revolutionized the ability to carry out large-scale experiments to study the adaptive immune response. Since the method was first introduced in 2009, AIRR sequencing (AIRR-Seq) has been applied to survey the immune state of individuals, identify antigen-specific or immune-state-associated signatures of immune responses, study the development of the antibody immune response, and guide the development of vaccines and antibody therapies. Recent advancements in the technology include sequencing at the single-cell level and in parallel with gene expression, which allows the introduction of multi-omics approaches to understand in detail the adaptive immune response. Analyzing AIRR-seq data can prove challenging even with high-quality sequencing, in part due to the many steps involved and the need to parameterize each step. In this chapter, we outline key factors to consider when preprocessing raw AIRR-Seq data and annotating the genetic origins of the rearranged receptors. We also highlight a number of common difficulties with common AIRR-seq data processing and provide strategies to address them.