Open AccessNew mouse models for high resolution and live imaging of planar cell polarity proteins in vivo
Author(s) -
Lena P. Basta,
Michael Hill-Oliva,
Sarah V. Paramore,
Rishabh Sharan,
Audrey Goh,
Abhishek Biswas,
Marvin Cortez,
Katherine A. Little,
Eszter Pósfai,
Danelle Devenport
Publication year - 2021
Publication title -
development
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 3.754
H-Index - 325
eISSN - 1477-9129
pISSN - 0950-1991
DOI - 10.1242/dev.199695
Subject(s) - biology , cell polarity , microbiology and biotechnology , protein subcellular localization prediction , live cell imaging , polarity (international relations) , sted microscopy , transmembrane protein , zebrafish , epidermis (zoology) , cell , anatomy , superresolution , genetics , gene , receptor , artificial intelligence , computer science , image (mathematics)
The collective polarization of cellular structures and behaviors across a tissue plane is a near universal feature of epithelia known as planar cell polarity (PCP). This property is controlled by the core PCP pathway, which consists of highly conserved membrane-associated protein complexes that localize asymmetrically at cell junctions. Here, we introduce three new mouse models for investigating the localization and dynamics of transmembrane PCP proteins: Celsr1, Fz6 and Vangl2. Using the skin epidermis as a model, we characterize and verify the expression, localization and function of endogenously tagged Celsr1-3xGFP, Fz6-3xGFP and tdTomato-Vangl2 fusion proteins. Live imaging of Fz6-3xGFP in basal epidermal progenitors reveals that the polarity of the tissue is not fixed through time. Rather, asymmetry dynamically shifts during cell rearrangements and divisions, while global, average polarity of the tissue is preserved. We show using super-resolution STED imaging that Fz6-3xGFP and tdTomato-Vangl2 can be resolved, enabling us to observe their complex localization along junctions. We further explore PCP fusion protein localization in the trachea and neural tube, and discover new patterns of PCP expression and localization throughout the mouse embryo.