The Interplay of Aging, Immune Signaling and Stem Cell Function

This project aims to investigate how immune environment changes contribute to muscle stem cell dysfunction and regenerative decline in aging, with the goal of improving stem cell therapies.

Subsidie
€ 1.998.843
2024

Projectdetails

Introduction

Adult stem cells (SCs) sustain tissue renewal and repair throughout life. The SC niche is fundamental in the regulation of SC function and an important contributor to SC decline in aging. While alterations in the tissue’s immune environment are emerging as important contributors to impairments found in aged organs, their contribution to SC dysfunction in aging is unknown.

Background

The skeletal muscle (SkM) is a paradigmatic model to study age-related loss of repair capacity. Muscle stem cell (MuSC) function during regeneration requires plasticity in transit between states of quiescence, activation, and differentiation. MuSC functional impairments in aging result from changes in the extrinsic cues that govern their behavior, but also cell intrinsic alterations, including senescence and defects in lineage commitment. However, we still have a limited understanding of how changes in the environment manifest as SC intrinsic defects.

Previous Work

Our previous work indicates that changes in immune signaling are important drivers of MuSC dysfunction and regenerative decline in aging.

Research Aims

Here, we propose to identify the contribution of specific immune populations and signals to changes in regenerative capacity and MuSC activity in aging (Aim 1).

  1. We hypothesize that the immune environment is an essential regulator of MuSC plasticity and lineage commitment under regenerative pressure.
  2. Immune alterations underlie defects in MuSC lineage fidelity in aging.

We propose to map the trajectories of MuSCs diverging from the myogenic lineage and uncover the changes in epigenetic landscape that underlie the loss of lineage fidelity associated with immune aging, identifying transcriptional regulators of MuSC fate (Aim 2).

Application of Knowledge

The knowledge generated on the mechanisms linking immune aging and MuSC dysfunction will be tested for conservation in human SkM and will be applied to improve the success of MuSC-based therapies in aging (Aim 3).

Financiële details & Tijdlijn

Financiële details

Subsidiebedrag€ 1.998.843
Totale projectbegroting€ 1.998.843

Tijdlijn

Startdatum1-3-2024
Einddatum28-2-2029
Subsidiejaar2024

Partners & Locaties

Projectpartners

  • FUNDACAO GIMM - GULBENKIAN INSTITUTE FOR MOLECULAR MEDICINEpenvoerder

Land(en)

Portugal

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