UCL Division of Biosciences


CDB Seminar - Dr Jakub Sedzinski, Novo Nordisk Foundation Center of Stem Cell Medicine, reNEW

26 June 2024, 12:00 pm–1:00 pm

Photo of Jakub Sedzinski

Title: Fate and mechanics of multiciliated cells during development

This event is free.

Event Information

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Michael Wright – Cell and Developmental Biology

Abstract: During embryonic development, regeneration and homeostasis, cells have to physically integrate into their target tissues, where they ultimately execute their function. Despite a significant body of research on how mechanical forces instruct cellular behaviors within the plane of an epithelium, very little is known about the mechanical interplay at the interface between migrating cells and their surrounding tissue, which has its own dynamics, architecture and identity. Here, using quantitative in vivo imaging and molecular perturbations, together with a theoretical model, we reveal that multiciliated cell (MCC) precursors in the Xenopus embryo form dynamic filopodia that pull at the vertices of the overlying epithelial sheet to probe their stiffness and identify the preferred positions for their integration into the tissue. Moreover, we report a novel function for a structural component of vertices, the lipolysis-stimulated lipoprotein receptor (LSR), in filopodia dynamics and show its critical role in cell intercalation. Remarkably, we find that pulling forces equip the MCCs to remodel the epithelial junctions of the neighboring tissue, enabling them to generate a permissive environment for their integration. Our findings reveal the intricate physical crosstalk at the cell-tissue interface and uncover previously unknown functions for mechanical forces in orchestrating cell integration.

Zoom: https://ucl.zoom.us/j/96193679809

Host: Alessandro Mongera

About the Speaker

Dr Jakub Sedzinski

Associate Professor at Novo Nordisk Foundation Center of Stem Cell Medicine, reNEW

The research goal of Assoc. Professor Jakub Sedzinski's laboratory at UCPH is to understand the mechanical and molecular processes driving the development and regeneration of mucociliary epithelium (MCE). They aim to contribute to novel therapeutic approaches for respiratory diseases linked to impaired MCE function, such as asthma, Chronic Obstructive Pulmonary Disease (COPD), and Primary Ciliary Dyskinesia (PCD).

More about Dr Jakub Sedzinski