Functional Imaging Methods for Investigating 3D Choroid Plexus Organoids

The choroid plexus (ChP) is a vital brain structure that produces cerebrospinal fluid (CSF) and forms a selective barrier between the blood and CSF, essential for brain homeostasis. Composed of secretory epithelial cells, connective stroma, and a fenestrated vascular network, the ChP supports nutrient transport, immune surveillance, and the clearance of toxic by-products. Despite its significance in maintaining cerebral function, the mechanisms underlying its development and maturation remain poorly understood. Recent advancements, such as the creation of stem cell-derived three-dimensional (3D) ChP organoid model, provide a promising platform for studying these processes. The ChP organoid model replicates key developmental stages and functions of the ChP, including CSF secretion and barrier formation. Additionally, they offer unique opportunities to investigate the impacts of drugs, pathogens, and toxins on the blood-CSF barrier. This study highlights imaging techniques critical for the characterization and utilization of ChP organoids, illustrating their value in advancing our understanding of ChP biology and its role in health and disease.