Search Results for author: Helen M. Byrne

Found 20 papers, 8 papers with code

Using a probabilistic approach to derive a two-phase model of flow-induced cell migration

no code implementations25 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.

Topological classification of tumour-immune interactions and dynamics

no code implementations10 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.

Classification

Computational modelling of angiogenesis: The importance of cell rearrangements during vascular growth

no code implementations18 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.

Investigating the influence of growth arrest mechanisms on tumour responses to radiotherapy

no code implementations26 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.

Detecting Temporal shape changes with the Euler Characteristic Transform

no code implementations21 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.

Topological Data Analysis

Macrophage anti-inflammatory behaviour in a multiphase model of atherosclerotic plaque development

no code implementations3 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.

Designing experimental conditions to use the Lotka-Volterra model to infer tumor cell line interaction types

no code implementations17 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.

Experimental Design

Dynamic fibronectin assembly and remodeling by leader neural crest cells prevents jamming in collective cell migration

1 code implementation16 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.

Minimal Morphoelastic Models of Solid Tumour Spheroids: A Tutorial

1 code implementation28 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.

Multiscale methods for signal selection in single-cell data

1 code implementation15 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.

feature selection

Structural features of microvascular networks trigger blood-flow oscillations

1 code implementation26 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.

Predicting radiotherapy patient outcomes with real-time clinical data using mathematical modelling

1 code implementation6 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.

Decision Making

Algebra, Geometry and Topology of ERK Kinetics

no code implementations1 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.

Spatio-temporal modelling of phenotypic heterogeneity in tumour tissues and its impact on radiotherapy treatment

no code implementations19 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.

A method to coarse-grain multi-agent stochastic systems with regions of multistability

no code implementations7 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.

Phenotypic variation modulates the growth dynamics and response to radiotherapy of solid tumours under normoxia and hypoxia

no code implementations14 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.

Topological data analysis distinguishes parameter regimes in the Anderson-Chaplain model of angiogenesis

1 code implementation2 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.

Topological Data Analysis

Multiscale Topology Characterises Dynamic Tumour Vascular Networks

1 code implementation19 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.

Topological Data Analysis

A Multiphase Model of Growth Factor-Regulated Atherosclerotic Cap Formation

no code implementations8 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.

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