A Personalized Glomerulus Chip Engineered from Stem Cell-Derived Epithelium and Vascular Endothelium

Area of Science:

• Biomedical Engineering
• Nephrology
• Stem Cell Biology

Background:

• Understanding kidney disease mechanisms and developing targeted therapies are hindered by the lack of functional in vitro models.
• Existing organ-on-a-chip models often use cells from multiple donors, limiting patient-specific disease modeling.
• Human induced pluripotent stem (iPS) cells offer potential for creating personalized organoid models.

Purpose of the Study:

• To engineer a personalized glomerulus chip system using patient-derived stem cells.
• To validate the chip's ability to mimic the structure and function of the human glomerular filtration barrier.
• To model drug-induced glomerular injury in a patient-specific in vitro system.

Main Methods:

• Reconstituted a glomerulus chip system using human iPS cell-derived vascular endothelial cells and podocytes from a single patient.
• Validated the chip's structural and functional mimicry of the glomerular filtration barrier.
• Induced glomerular injury using Adriamycin to observe effects on the chip model.

Main Results:

• The engineered glomerulus chip successfully mimicked the structure and essential functions of the glomerular filtration barrier.
• Adriamycin administration disrupted the chip's endothelial and podocyte layers, causing albuminuria, mirroring patient responses.
• The model demonstrated patient-specific responses to drug-induced kidney injury.

Conclusions:

• The personalized glomerulus chip serves as a valuable in vitro model for studying kidney disease mechanisms and discovering personalized therapies.
• This stem cell-derived organ chip technology provides a blueprint for developing more personalized organ-on-a-chip and body-on-a-chip models.
• The study highlights the potential of iPS cell technology for advancing personalized medicine in nephrology.