User profiles for Spencer Farrell

Spencer Farrell

University of Toronto
Verified email at utoronto.ca
Cited by 384

Unifying aging and frailty through complex dynamical networks

AD Rutenberg, AB Mitnitski, SG Farrell… - Experimental …, 2018 - Elsevier
To explore the mechanistic relationships between aging, frailty and mortality, we developed
a computational model in which possible health attributes are represented by the nodes of a …

The potential for complex computational models of aging

S Farrell, G Stubbings, K Rockwood, A Mitnitski… - Mechanisms of Ageing …, 2021 - Elsevier
The gradual accumulation of damage and dysregulation during the aging of living organisms
can be quantified. Even so, the aging process is complex and has multiple interacting …

[HTML][HTML] Generating synthetic aging trajectories with a weighted network model using cross-sectional data

S Farrell, A Mitnitski, K Rockwood, A Rutenberg - Scientific Reports, 2020 - nature.com
We develop a computational model of human aging that generates individual health trajectories
with a set of observed health attributes. Our model consists of a network of interacting …

Network model of human aging: Frailty limits and information measures

SG Farrell, AB Mitnitski, K Rockwood, AD Rutenberg - Physical Review E, 2016 - APS
Aging is associated with the accumulation of damage throughout a persons life. Individual
health can be assessed by the Frailty Index (FI). The FI is calculated simply as the proportion f …

Measurements of damage and repair of binary health attributes in aging mice and humans reveal that robustness and resilience decrease with age, operate over …

S Farrell, AE Kane, E Bisset, SE Howlett, AD Rutenberg - Elife, 2022 - elifesciences.org
As an organism ages, its health-state is determined by a balance between the processes of
damage and repair. Measuring these processes requires longitudinal data. We extract …

[HTML][HTML] Interpretable machine learning for high-dimensional trajectories of aging health

S Farrell, A Mitnitski, K Rockwood… - PLoS Computational …, 2022 - journals.plos.org
We have built a computational model for individual aging trajectories of health and survival,
which contains physical, functional, and biological variables, and is conditioned on …

Probing the network structure of health deficits in human aging

SG Farrell, AB Mitnitski, O Theou, K Rockwood… - Physical Review E, 2018 - APS
We confront a network model of human aging and mortality in which nodes represent health
attributes that interact within a scale-free network topology, with observational data that use …

Informative frailty indices from binarized biomarkers

G Stubbings, S Farrell, A Mitnitski, K Rockwood… - Biogerontology, 2020 - Springer
Frailty indices (FIs) based on continuous valued health data, such as obtained from blood
and urine tests, have been shown to be predictive of adverse health outcomes. However, …

Non-Fickian single-file pore transport

S Farrell, AD Rutenberg - Physical Review E, 2021 - APS
Single-file diffusion exhibits anomalously slow collective transport when particles are able
to immobilize by binding and unbinding to the one-dimensional channel within which the …

[PDF][PDF] Inferring single-cell transcriptomic dynamics with structured latent gene expression dynamics

S Farrell, M Mani, S Goyal - Cell Reports Methods, 2023 - cell.com
Gene expression dynamics provide directional information for trajectory inference from
single-cell RNA sequencing data. Traditional approaches compute RNA velocity using strict …