1 code implementation • 20 Dec 2023 • Maria Francesca Abbate, Thomas Dupic, Emmanuelle Vigne, Melody A. Shahsavarian, Aleksandra M. Walczak, Thierry Mora
B cell receptors (BCRs) play a crucial role in recognizing and fighting foreign antigens.
1 code implementation • 25 Jul 2023 • Giulio Isacchini, Valentin Quiniou, Hélène Vantomme, Paul Stys, Encarnita Mariotti-Ferandiz, David Klatzmann, Aleksandra M. Walczak, Thierry Mora, Armita Nourmohammad
The adaptive immune response relies on T cells that combine phenotypic specialization with diversity of T cell receptors (TCRs) to recognize a wide range of pathogens.
1 code implementation • 21 Apr 2023 • Victor Chardès, Andrea Mazzolini, Thierry Mora, Aleksandra M. Walczak
The immune-virus system behaves like a Fisher wave at low cross-reactivities, and like a fitness wave at high cross-reactivities.
no code implementations • 13 Mar 2023 • Thierry Mora, Aleksandra M. Walczak
A cornerstone of the classical view of tolerance is the elimination of self-reactive T cells during negative selection in the thymus.
no code implementations • 10 Jan 2023 • Lauritz Hahn, Aleksandra M. Walczak, Thierry Mora
Biological cells encode information about their environment through biochemical signaling networks that control their internal state and response.
no code implementations • 22 Dec 2022 • Natanael Spisak, Gabriel Athènes, Thomas Dupic, Thierry Mora, Aleksandra M. Walczak
B-cell repertoires are characterized by a diverse set of receptors of distinct specificities generated through two processes of somatic diversification: V(D)J recombination and somatic hypermutations.
no code implementations • 24 Feb 2022 • Ezequiel A. Galpern, Jacopo Marchi, Thierry Mora, Aleksandra M. Walczak, Diego U. Ferreiro
Here, we propose a scheme to map evolutionary information at the sequence level to a coarse-grained model for repeat-protein folding and use it to investigate the folding of thousands of repeat-proteins.
no code implementations • 15 Dec 2021 • Cosimo Lupo, Natanael Spisak, Aleksandra M. Walczak, Thierry Mora
The model includes antibody-specific maturation ages to account for variable mutational loads in the repertoire.
no code implementations • 26 Jul 2021 • Victor Chardès, Massimo Vergassola, Aleksandra M. Walczak, Thierry Mora
This plasticity of the repertoire drives the emergence of distinct regimes for the size and diversity of the memory pool, depending on the density of naive cells and on the mutation rate of the strain.
1 code implementation • 3 Jun 2021 • Giulio Isacchini, Natanael Spisak, Armita Nourmohammad, Thierry Mora, Aleksandra M. Walczak
One class of methods uses data simulated with different parameters to infer models of the likelihood-to-evidence ratio, or equivalently the posterior function.
no code implementations • 20 Feb 2021 • Jacopo Marchi, Michael Lässig, Aleksandra M. Walczak, Thierry Mora
Here we present a mathematical theory of co-evolution between immune systems and viruses in a finite-dimensional antigenic space, which describes the cross-reactivity of viral strains and immune systems primed by previous infections.
1 code implementation • 6 Feb 2021 • Meriem Bensouda Koraichi, Maximilian Puelma Touzel, Andrea Mazzolini, Thierry Mora, Aleksandra M. Walczak
High-throughput sequencing of T- and B-cell receptors makes it possible to track immune repertoires across time, in different tissues, in acute and chronic diseases and in healthy individuals.
1 code implementation • 23 Jul 2020 • Natanael Spisak, Aleksandra M. Walczak, Thierry Mora
Somatic hypermutations of immunoglobulin (Ig) genes occuring during affinity maturation drive B-cell receptors' ability to evolve strong binding to their antigenic targets.
no code implementations • 24 Jun 2020 • Thomas Dupic, Meriem Bensouda Koraichi, Anastasia Minervina, Mikhail Pogorelyy, Thierry Mora, Aleksandra M. Walczak
Immune repertoires provide a unique fingerprint reflecting the immune history of individuals, with potential applications in precision medicine.
1 code implementation • 17 May 2020 • Anastasia A. Minervina, Ekaterina A. Komech, Aleksei Titov, Meriem Bensouda Koraichi, Elisa Rosati, Ilgar Z. Mamedov, Andre Franke, Grigory A. Efimov, Dmitriy M. Chudakov, Thierry Mora, Aleksandra M. Walczak, Yuri B. Lebedev, Mikhail V. Pogorelyy
Certain T cell clones were detected in the memory fraction at the pre-infection timepoint, suggesting participation of pre-existing cross-reactive memory T cells in the immune response to SARS-CoV-2.
no code implementations • 29 Mar 2020 • Giulio Isacchini, Carlos Olivares, Armita Nourmohammad, Aleksandra M. Walczak, Thierry Mora
Recent advances in modelling VDJ recombination and subsequent selection of T and B cell receptors provide useful tools to analyze and compare immune repertoires across time, individuals, and tissues.
1 code implementation • 17 Dec 2019 • Maximilian Puelma Touzel, Aleksandra M. Walczak, Thierry Mora
High-throughput sequencing of B- and T-cell receptors makes it possible to track immune repertoires across time, in different tissues, and in acute and chronic diseases or in healthy individuals.
Quantitative Methods
1 code implementation • 27 Nov 2019 • Giulio Isacchini, Zachary Sethna, Yuval Elhanati, Armita Nourmohammad, Aleksandra M. Walczak, Thierry Mora
T-cell receptors (TCR) are key proteins of the adaptive immune system, generated randomly in each individual, whose diversity underlies our ability to recognize infections and malignancies.
Quantitative Methods
no code implementations • 25 Oct 2019 • Anastasia A. Minervina, Mikhail V. Pogorelyy, Ekaterina A. Komech, Vadim K. Karnaukhov, Petra Bacher, Elisa Rosati, Andre Franke, Dmitriy M. Chudakov, Ilgar Z. Mamedov, Yuri B. Lebedev, Thierry Mora, Aleksandra M. Walczak
The diverse repertoire of T-cell receptors (TCR) plays a key role in the adaptive immune response to infections.
no code implementations • 8 Jul 2019 • Grégoire Altan-Bonnet, Thierry Mora, Aleksandra M. Walczak
The adaptive immune system is a dynamical, self-organized multiscale system that protects vertebrates from both pathogens and internal irregularities, such as tumours.
no code implementations • 10 Feb 2015 • Yuval Elhanati, Zachary Sethna, Quentin Marcou, Curtis G. Callan Jr., Thierry Mora, Aleksandra M. Walczak
We quantify the VDJ recombination and somatic hypermutation processes in human B-cells using probabilistic inference methods on high-throughput DNA sequence repertoires of human B-cell receptor heavy chains.
Populations and Evolution Genomics