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Implications of tissue stiffness in growth control during limb regeneration in s...

Implications of tissue stiffness in growth control during limb regeneration in salamanders Ambystoma mexicanum In several regenerating organisms it has been observed that distally amputated structures grow slower than proximally amputated ones, resulting in an overall time of regeneration that is independent of the tissue to be reformed. T... ver más

30/04/2023

TUD

175K€

Presupuesto del proyecto: 175K€

Líder del proyecto

TECHNISCHE UNIVERSITAET DRESDEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Fecha límite participación Sin fecha límite de participación.

Financiación concedida El organismo H2020 notifico la concesión del proyecto el día 2023-04-30

MSCA-IF-2020: Individual Fellowships

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1 Participantes

TUD

174.81K€ | Lider

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Duración del proyecto: 24 meses Fecha Inicio: 2021-04-16
Fecha Fin: 2023-04-30

Líder del proyecto

TECHNISCHE UNIVERSITAET DRESDEN No se ha especificado una descripción o un objeto social para esta compañía.

TRL 4-5

Presupuesto del proyecto 175K€

Fecha límite de participación Sin fecha límite de participación.

Descripción del proyecto In several regenerating organisms it has been observed that distally amputated structures grow slower than proximally amputated ones, resulting in an overall time of regeneration that is independent of the tissue to be reformed. This observation suggests that cell proliferation or cell size could be adjusted with the plane of amputation along the proximo-distal (PD) axis, leading to an interesting scaling behaviour. It has been proposed that positional identity in the limb may be encoded as a proximal-to-distal gradient of cell surface molecules, that would in turn alter intercellular adhesions. Thus, it is possible that such differential adhesions are associated to the control of cell growth during regeneration. The central aim of this proposal is to address this question by combining cell biology, mathematical and physical tools, with the ultimate goal of understanding how the biomechanical properties of tissues affect regeneration, which may have important implications for the design of biomaterials aimed at being used for regenerative medicine. We will tackle this question in the highly regenerative salamander species Axolotl mexicanum, in which limb regeneration is initiated regardless of the amputation plane, and the regenerating limb grows until its size matches the contralateral undamaged one. We will evaluate growth rate and cell cycle of regenerating limbs amputated at different levels, and mathematically describe cell proliferation patterns. We will characterize several cell surface and extracellular matrix molecules along the PD axis, and measure tissue mechanics in vivo. Furthermore, we will for the first time, evaluate the Hippo pathway in salamanders, an important modulator of cell growth in response to several physical inputs, as the causal link between increased tissue stiffness and decreased proliferation.

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