no code implementations • 25 Sep 2023 • Yaron Ben-Ami, Joe M. Pitt-Francis, Philip K. Maini, Helen M. Byrne
Using velocity-space averaging, we reformulate the model as a system of continuum equations for the spatio-temporal evolution of the cell volume fraction and flux, in response to forcing terms which depend on the local direction and magnitude of the mechanochemical cues.
no code implementations • 10 Aug 2023 • Jingjie Yang, Heidi Fang, Jagdeep Dhesi, Iris H. R. Yoon, Joshua A. Bull, Helen M. Byrne, Heather A. Harrington, Gillian Grindstaff
We find additionally that dimension 0 persistence applied to macrophage data, representing multi-scale clusters of the spatial arrangement of macrophages, performs best at this classification task at early time steps, prior to full tumour development, and performs even better when time-dependent data are included; in contrast, topological measures capturing the shape of the tumour, such as tortuosity and punctures in the cell arrangement, perform best at intermediate and later stages.
no code implementations • 18 Jul 2023 • Daria Stepanova, Helen M. Byrne, Philip K. Maini, Tomás Alarcón
This review of the theoretical modelling of angiogenesis is the first to focus on the phenomenon of cell mixing during early sprouting.
no code implementations • 26 Feb 2023 • Chloé Colson, Philip K. Maini, Helen M. Byrne
Cancer is a heterogeneous disease and tumours of the same type can differ greatly at the genetic and phenotypic levels.
no code implementations • 21 Dec 2022 • Lewis Marsh, Felix Y. Zhou, Xiao Qin, Xin Lu, Helen M. Byrne, Heather A. Harrington
Organoids are multi-cellular structures which are cultured in vitro from stem cells to resemble specific organs (e. g., brain, liver) in their three-dimensional composition.
no code implementations • 3 Nov 2022 • Ishraq U. Ahmed, Helen M. Byrne, Mary R. Myerscough
Finally, we introduce an additional bead species to model macrophage tagging via microspheres, and we use the extended model to explore how high rates of cell death and low rates of efferocytosis and emigration prevent the clearance of macrophages from the plaque.
no code implementations • 17 Sep 2022 • Heyrim Cho, Allison L. Lewis, Kathleen M. Storey, Helen M. Byrne
Structural identifiability of the Lotka-Volterra model is confirmed, and practical identifiability is assessed for three experimental designs: (a) use of a single data set, with a mixture of both cell lines observed over time, (b) a sequential design where growth rates and carrying capacities are estimated using data from experiments in which each cell line is grown in isolation, and then interaction parameters are estimated from an experiment involving a mixture of both cell lines, and (c) a parallel experimental design where all model parameters are fitted to data from two mixtures simultaneously.
1 code implementation • 16 Sep 2022 • W. Duncan Martinson, Rebecca McLennan, Jessica M. Teddy, Mary C. McKinney, Lance A. Davidson, Ruth E. Baker, Helen M. Byrne, Paul M. Kulesa, Philip K. Maini
Collective cell migration plays an essential role in vertebrate development, yet the extent to which dynamically changing microenvironments influence this phenomenon remains unclear.
1 code implementation • 28 Jun 2022 • Benjamin J. Walker, Giulia L. Celora, Alain Goriely, Derek E. Moulton, Helen M. Byrne
Tumour spheroids have been the focus of a variety of mathematical models, ranging from Greenspan's classical study of the 1970s through to contemporary agent-based models.
1 code implementation • 15 Jun 2022 • Renee S. Hoekzema, Lewis Marsh, Otto Sumray, Thomas M. Carroll, Xin Lu, Helen M. Byrne, Heather A. Harrington
Analysis of single-cell transcriptomics often relies on clustering cells and then performing differential gene expression (DGE) to identify genes that vary between these clusters.
1 code implementation • 26 Feb 2022 • Yaron Ben-Ami, George W. Atkinson, Joe M. Pitt-Francis, Philip K. Maini, Helen M. Byrne
We analyse mathematical models in order to understand how microstructural features of vascular networks may affect blood-flow dynamics, and to identify particular characteristics that promote the onset of self-sustained oscillations.
1 code implementation • 20 Feb 2022 • John T. Nardini, Charles W. J. Pugh, Helen M. Byrne
Disease complications can alter vascular network morphology and disrupt tissue functioning.
1 code implementation • 6 Jan 2022 • Alexander P. Browning, Thomas D. Lewin, Ruth E. Baker, Philip K. Maini, Eduardo G. Moros, Jimmy Caudell, Helen M. Byrne, Heiko Enderling
Hindering effective use of models in this context is the sparsity of clinical measurements juxtaposed with the model complexity required to produce the full range of possible patient responses.
no code implementations • 1 Dec 2021 • Lewis Marsh, Emilie Dufresne, Helen M. Byrne, Heather A. Harrington
The MEK/ERK signalling pathway is involved in cell division, cell specialisation, survival and cell death.
no code implementations • 19 Oct 2021 • Giulia L. Celora, Helen M. Byrne, P. G. Kevrekidis
We present a mathematical model that describes how tumour heterogeneity evolves in a tissue slice that is oxygenated by a single blood vessel.
no code implementations • 7 May 2021 • Daria Stepanova, Helen M. Byrne, Philip K. Maini, Tomás Alarcón
Here we use large deviation theory to decrease the computational cost of a spatially-extended multi-agent stochastic system with a region of multi-stability by coarse-graining it to a continuous time Markov chain on the state space of stable steady states of the original system.
no code implementations • 14 Jan 2021 • Giulia L. Celora, Helen M. Byrne, Christos Zois, Panos G. Kevrekidis
We use a combination of numerical and analytical techniques to quantify how under physiological oxygen levels the cells evolve to a differentiated phenotype and under low oxygen level (i. e., hypoxia) they de-differentiate.
1 code implementation • 2 Jan 2021 • John T. Nardini, Bernadette J. Stolz, Kevin B. Flores, Heather A. Harrington, Helen M. Byrne
Here we simulate the Anderson-Chaplain model of angiogenesis at different parameter values and quantify the vessel architectures of the resulting synthetic data.
1 code implementation • 19 Aug 2020 • Bernadette J. Stolz, Jakob Kaeppler, Bostjan Markelc, Franziska Mech, Florian Lipsmeier, Ruth J. Muschel, Helen M. Byrne, Heather A. Harrington
Advances in imaging techniques enable high resolution 3D visualisation of vascular networks over time and reveal abnormal structural features such as twists and loops, and their quantification is an active area of research.
no code implementations • 8 Aug 2019 • Michael G. Watson, Helen M. Byrne, Charlie Macaskill, Mary R. Myerscough
In mature plaques, vascular smooth muscle cells (SMCs) are recruited from the adjacent medial layer to deposit a cap of fibrous collagen over the fatty plaque core.