Endocrinology at a Miniature Level: Pluripotent Stem-Cell-Derived Organoid Models of Hypothalamus–Pituitary Axes

Pluripotent stem cells (PSCs) have proven outstanding potential to revolutionize biomedical research. Specifically, their capacity to form 3D multicellular systems that recapitulate organ development and biology, known as organoids, has transformed basic and translational research. The groundbreaking technology is also being applied to the intricate hypothalamus–pituitary (HP) axes, including the target organs (such as gonads, thyroid and adrenal glands). These HP axes govern critical physiological processes, including reproduction, metabolism and stress. Here, we provide an overview of PSC-derived organoid models that are part of the HP axes, both as individual and multi-organ systems, and evaluate their culturing conditions, phenotypic characteristics, advantages, drawbacks and challenges, as well as their potential for disease modeling and therapeutic discovery. By offering this wide perspective, our review will also serve as a key resource for researchers navigating the evolving landscape of PSC-derived organoid technologies in endocrinology.