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From Foundations of Phylodynamics to New Applications in Cell Biology

Project description

Biological applications of population dynamics

How did the current biodiversity emerge? How does a single fertilised egg develop into a functioning organism? Which factors govern the spread of a pathogen during an epidemic? The answers to these questions depend on the underlying population dynamic processes, i.e. the replication and change of individuals. The EU-funded PhyCogy project formulates and characterises models describing the replication and change of individuals. The obtained so-called phylodynamic modelling framework will be applied to genomic data to answer the above-mentioned and related questions spanning the fields of macroevolution, epidemiology, and development. The generalisability of the developed framework allows for future application across biological scales such as microbiology, virology, ecology, immunology, and cancer.

Objective

How did the current biodiversity emerge? How does a single fertilised egg develop into a functioning organism? Which factors govern the spread of a pathogen during an epidemic? The answers to these questions depend on the underlying population dynamic processes, i.e. the replication and change of individuals. I will establish fundamental rules of population dynamic processes within the project PhyCogy.

I hypothesize that applying statistical tools to phylogenetic trees uncovers these fundamental rules. Such statistical phylodynamic inference is possible since trees display replication events together with the genotypes and phenotypes of individuals. However, the phylodynamic technique has only been widely applied in the disciplines of macroevolution and epidemiology.

In Part I of the PhyCogy project, I will lay generalizable mathematical, statistical, and computational foundations for phylodynamics. In particular, I will formulate, explore, and apply novel phylodynamic models that are appropriate for neutral as well as selective or developmental processes. I will then investigate whether the newly proposed phylodynamic models allow us to reconcile competing theories within macroevolution and real-time epidemiology.

In Part II, the proposed phylodynamic models are then used to investigate the development of multicellular organisms. I will quantify brain development based on human stem-cell derived organoids as well as zebrafish using single cell data obtained both via CRISPR-Cas9-based lineage tracing and transcriptome sequencing.

The project PhyCogy establishes a phylodynamic foundation, quantifying core population dynamic processes in macroevolution, epidemiology, and development. Importantly, the generalizability of the framework allows for future application across biological scales, leading to the rules of population dynamic processes in disciplines as diverse as microbiology, virology, ecology, immunology, or cancer.

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Keywords

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Programme(s)

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Topic(s)

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Funding Scheme

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ERC-COG - Consolidator Grant

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Call for proposal

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(opens in new window) ERC-2020-COG

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Host institution

EIDGENOESSISCHE TECHNISCHE HOCHSCHULE ZUERICH
Net EU contribution

Net EU financial contribution. The sum of money that the participant receives, deducted by the EU contribution to its linked third party. It considers the distribution of the EU financial contribution between direct beneficiaries of the project and other types of participants, like third-party participants.

€ 1 999 540,00
Address
Raemistrasse 101
8092 Zuerich
Switzerland

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Region
Schweiz/Suisse/Svizzera Zürich Zürich
Activity type
Higher or Secondary Education Establishments
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Total cost

The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.

€ 1 999 540,00

Beneficiaries (1)

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