Simulating CXCR5 Dynamics in Complex Tissue Microenvironments

Cosgrove, Jason, Alden, Kieran, Stein, Jens, Coles, Mark and Timmis, Jonathan (2021) Simulating CXCR5 Dynamics in Complex Tissue Microenvironments. Frontiers in Immunology. ISSN 1664-3224

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To effectively navigate complex tissue microenvironments, immune cells sense molecular concentration gradients using G-protein coupled receptors. However, due to the complexity of receptor activity, and the multimodal nature of chemokine gradients in vivo, chemokine receptor activity in situ is poorly understood. To address this issue, we apply a modelling and simulation approach that permits analysis of the spatiotemporal dynamics of CXCR5 expression within an in silico B-follicle with single-cell resolution. Using this approach, we show that that in silico B-cell scanning is robust to changes in receptor numbers and changes in individual kinetic rates of receptor activity, but sensitive to global perturbations where multiple parameters are altered simultaneously. Through multi-objective optimization analysis we find that the rapid modulation of CXCR5 activity through receptor binding, desensitization and recycling is required for optimal antigen scanning rates. From these analyses we predict that chemokine receptor signaling dynamics regulate migration in complex tissue microenvironments to a greater extent than the total numbers of receptors on the cell surface.

Item Type: Article
Subjects: Sciences > Biomedical Sciences
Computing > Software Engineering
Divisions: Faculty of Technology > School of Computer Science
Depositing User: Jonathan Timmis
Date Deposited: 09 Sep 2021 13:23
Last Modified: 09 Sep 2021 13:23
ORCID for Jonathan Timmis: ORCID iD

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