An efficient method to generate kidney organoids at the air-liquid interface.

Area of Science:

• Nephrology
• Developmental Biology
• Stem Cell Biology

Background:

• Increasing global prevalence of kidney dysfunction necessitates novel regenerative strategies.
• Current kidney organoid generation methods yield dispersed tubular structures, limiting therapeutic applications.
• Understanding renal progenitor cell differentiation is crucial for tissue engineering.

Purpose of the Study:

• To develop a protocol for generating kidney organoids with tightly packed tubular clusters and major renal structures.
• To provide a rapid method for creating kidney organoids suitable for nephrological research.
• To facilitate in vitro studies of kidney development, disease modeling, and chemical screening.

Main Methods:

• Utilized organotypic culture conditions with asynchronous mixing of kidney progenitors.
• Employed a National Institute of Health-approved human embryonic stem cell line.
• Directed differentiation of stem cells into kidney organoids over an 18-day period.

Main Results:

• Generated kidney organoids with tightly packed tubular clusters and an integrated endothelial network.
• Identified functional proximal tubules within the developed organoids.
• Established a rapid 18-day protocol for kidney organoid generation.

Conclusions:

• The described protocol offers a fast and efficient method for generating kidney organoids with key renal structures.
• These organoids serve as a valuable platform for studying kidney development, modeling diseases, and screening compounds.
• Further optimization is needed to incorporate additional renal cell types and achieve physiological functionality.