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Discovering Biophysical Principles in Latent Space Representations of Immune Recognition.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Discovering Biophysical Principles in Latent Space Representations of Immune Recognition./
作者:	Rademaker, Thomas J. .
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2021,
面頁冊數:	207 p.
附註:	Source: Dissertations Abstracts International, Volume: 83-03, Section: B.
Contained By:	Dissertations Abstracts International83-03B.
標題:	Pathogens. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=28731037
ISBN:	9798544222897

Discovering Biophysical Principles in Latent Space Representations of Immune Recognition.
Rademaker, Thomas J. .

Discovering Biophysical Principles in Latent Space Representations of Immune Recognition. - Ann Arbor : ProQuest Dissertations & Theses, 2021 - 207 p.

Source: Dissertations Abstracts International, Volume: 83-03, Section: B.

Thesis (Ph.D.)--McGill University (Canada), 2021.

This item must not be sold to any third party vendors.

The adaptive immune system is a complex biological system acting over many length and time scales. T cells, effector cells of the adaptive immune system, are capable of recognizing minute amounts of pathogens and mounting a grotesque response, while not responding at all to large amounts of self antigens. The response is tightly regulated at the intra-, inter- and extracellular level through intricate protein-protein interaction networks. While the interactions have been described qualitatively, a quantitative understanding is often lacking.In this thesis, we present computational approaches inspired by physics and ma- chine learning to quantitatively study different aspects of immune recognition. First, using fitness-based parameter reduction, we extract the core module from the intracellular network of immune recognition. Second, using machine learning techniques, we study the sensitivity of immune recognition networks to antagonism, a perturbation to the antigen distribution that prevents T cells from responding to pathogens. We find that the output function of robust immune recognition networks contains a critical point, a finding that informs the design of robust machine learning classifiers.Finally, we predict antigen quality from cytokine dynamics. We represent the cytokine profile in a latent space and parameterize the latent space using piecewise ballistic mod- els. We validate our model against diverse experimental configurations, providing us with a biological basis for the model parameters. Using these parameters, we predict antigen quality independent of antigen quantity and initial T cell number, providing a reference antigen quality that known baselines cannot provide with a single measurement.

ISBN: 9798544222897Subjects--Topical Terms:

3540520
Pathogens.

Discovering Biophysical Principles in Latent Space Representations of Immune Recognition.
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245 1 0 $a Discovering Biophysical Principles in Latent Space Representations of Immune Recognition.
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300 $a 207 p.
500 $a Source: Dissertations Abstracts International, Volume: 83-03, Section: B.
500 $a Advisor: Francois, Paul.
502 $a Thesis (Ph.D.)--McGill University (Canada), 2021.
506 $a This item must not be sold to any third party vendors.
520 $a The adaptive immune system is a complex biological system acting over many length and time scales. T cells, effector cells of the adaptive immune system, are capable of recognizing minute amounts of pathogens and mounting a grotesque response, while not responding at all to large amounts of self antigens. The response is tightly regulated at the intra-, inter- and extracellular level through intricate protein-protein interaction networks. While the interactions have been described qualitatively, a quantitative understanding is often lacking.In this thesis, we present computational approaches inspired by physics and ma- chine learning to quantitatively study different aspects of immune recognition. First, using fitness-based parameter reduction, we extract the core module from the intracellular network of immune recognition. Second, using machine learning techniques, we study the sensitivity of immune recognition networks to antagonism, a perturbation to the antigen distribution that prevents T cells from responding to pathogens. We find that the output function of robust immune recognition networks contains a critical point, a finding that informs the design of robust machine learning classifiers.Finally, we predict antigen quality from cytokine dynamics. We represent the cytokine profile in a latent space and parameterize the latent space using piecewise ballistic mod- els. We validate our model against diverse experimental configurations, providing us with a biological basis for the model parameters. Using these parameters, we predict antigen quality independent of antigen quantity and initial T cell number, providing a reference antigen quality that known baselines cannot provide with a single measurement.
520 $a Le systeme immunitaire adaptatif est un systeme biologique complexe fonctionnant sur de nombreuses longueurs et echelles de temps. Les cellules T, cellules effectrices du systeme immunitaire adaptatif, sont capables de reconnaitre des quantites infimes d'agents pathogenes et de monter une reponse tres fort, tout en ne repondant pas du tout a de grandes quantites de soi-antigenes. La reponse est etroitement regulee au niveau intra-, inter- et extracellulaire par des reseaux complexes d'interaction proteine-proteine. Bien que les interactions aient ete decrites de maniere qualitative, une comprehension quantitative fait souvent defaut. Dans cette these, nous presentons des approches informatiques inspirees de la physique et de l'apprentissage automatique pour etudier quantitativement differents aspects de la reconnaissance immunitaire. Premierement, en utilisant la reduction des parametres basee sur la fitness, nous extrayons le module de base du reseau intracellulaire de reconnaissance immunitaire. Deuxiemement, a l'aide de techniques d'apprentissage automatique, nous etudions la sensibilite des reseaux de reconnaissance immunitaire a l'antagonisme, une perturbation de la distribution de l'antigene qui empeche les cellules T de repondre aux agents pathogenes. Nous constatons que la fonction de sortie des reseaux de reconnaissance immunitaire robustes contient un point critique, une decouverte qui informe la conception de classificateurs d'apprentissage automatique robustes. Enfin, nous predisons la qualite de l'antigene a partir des dynamiques de cytokines, molecules messageres extracellulaires. Nous representons le profil des cytokines dans un espace latent, parametrons l'espace latent a l'aide de modeles balistiques par morceaux et etudions des configurations experimentales, a partir desquelles nous extrayons une base biologique pour les parametres du modele. A partir de ces parametres, nous predisons la qualite de l'antigene independamment de la quantite d'antigene et du nombre initial de lymphocytes T, fournissant une qualite d'antigene de reference que les lignes de base connues ne peuvent pas fournir avec une seule mesure.
590 $a School code: 0781.
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650 4 $a Biologists. $3 975387
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650 4 $a Cytokines. $3 687114
650 4 $a Immunology. $3 611031
650 4 $a Adaptation. $3 3562958
650 4 $a Neurosciences. $3 588700
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650 4 $a Signal transduction. $3 3546420
650 4 $a Gene expression. $3 643979
650 4 $a Dendritic cells. $3 1001571
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650 4 $a Neural networks. $3 677449
650 4 $a Medical research. $2 bicssc $3 1556686
650 4 $a Lymphocytes. $3 895384
650 4 $a Ligands. $3 686413
650 4 $a Antigens. $3 700737
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650 4 $a Genetics. $3 530508
650 4 $a Interdisciplinary aspects. $3 3556290
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710 2 $a McGill University (Canada). $3 1018122
773 0 $t Dissertations Abstracts International $g 83-03B.
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