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Guillaume Charras -- Rupture strength of living cell monolayers [IN PERSON]

Patterned pufferfish scales demonstrating a Turing pattern in the natural world
Dates:11 November 2024
Times:14:00 - 15:00
What is it:Seminar
Organiser:Department of Mathematics
Who is it for:University staff, External researchers, Current University students
Speaker:Guillaume Charras
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  • Mathematics in the life sciences
  • Department of Mathematics

Other events

  • In category "Seminar"
  • In group "(Maths) Mathematics in the life sciences "
  • In group "(Maths) Maths seminar series"
  • By Department of Mathematics

Join us for this seminar by Guillaume Charras (UCL) as part of the North West Seminar Series in Mathematical Biology and Data Sciences. More details about the joint series can be found here https://northwestseminars.great-site.net/ .

The talk will be hosted in person in room 1.34 of the Simon Building. For those who cannot attend in person the talk will also be streamed via zoom, please contact carl.whitfield@manchester.ac.uk or igor.chernyavsky@manchester.ac.uk for the zoom link, or sign up to the mailing list.

Title: Rupture strength of living cell monolayers Abstract: To fulfil their function, epithelial tissues need to sustain mechanical stresses and avoid rupture. Although rupture is usually undesired, it is central to some developmental processes, for example, blastocoel formation. Nonetheless, little is known about tissue rupture because it is a multiscale phenomenon that necessitates comprehension of the interplay between mechanical forces and biological processes at the molecular and cellular scales. Here we characterize rupture in epithelial monolayers using mechanical measurements, live imaging and computational modelling. We show that despite consisting of only a single layer of cells, monolayers can withstand surprisingly large deformations, often accommodating several-fold increases in their length before rupture. At large deformation, epithelia increase their stiffness multiple fold in a process controlled by a supracellular network of keratin filaments. Perturbing the keratin network organization fragilized the monolayers and prevented strain-stiffening. Although the kinetics of adhesive bond rupture ultimately control tissue strength, tissue rheology and the history of deformation set the strain and stress at the onset of fracture.

To subscribe to the mailing list for this event series, please send an e-mail with the phrase “subscribe math-lifesci-seminar” in the message body to listserv@listserv.manchester.ac.uk

Speaker

Guillaume Charras

Role: Professor

Organisation: University College London

  • https://www.ucl.ac.uk/biosciences/people/guillaume-charras

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1.34
Simon Building
Manchester

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Carl Whitfield

carl.whitfield@manchester.ac.uk

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