USC researchers reported a new way to create more reproducible kidney organoids by combining spatial mapping of kidney development with engineered Wnt-secreting “synthetic organizer” cells, in Science. The approach targets a developmental organizing axis that helps arrange nephron structures. Instead of relying on broad chemical cues that can vary between organoid batches, the method uses synthetic organizer cells to recreate aspects of the in vivo signaling environment. The team reported improved reliability of organoid architecture, with implications for better disease models and more consistent preclinical evaluation. The work also supports longer-term efforts toward generating transplantable kidney tissue by strengthening control over tissue patterning, one of the largest gaps for organoid scalability and quality assurance.