Abstract
Cilia are hair-like projections that assemble at the surface of cells in various tissues of multicellular organisms through a complex cell biological process called ciliogenesis. Cilia can assemble as single structures per cell (i.e. non-motile primary cilia), which act as cell signaling centers that dictate cell fate, or can be assembled in distinct cell types as many copies per cell (i.e. motile cilia) that beat to move fluids at the cell surface. The mechanisms that orchestrate formation and function of cilia, which are dysregulated in pathological settings such as ciliopathies, remain incompletely understood. Stem cell-derived organoids represent valuable models to study the mechanisms of ciliogenesis, ciliary signaling, and ciliary beating that collectively promote tissue development and homeostasis. Here, we present a comprehensive protocol for the growth of mammary organoids derived from mouse mammary stem cells and for immunofluorescence staining of primary cilia in these three-dimensional structures.
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