Advanced Kidney Models In Vitro Using the Established Cell Line Renal Proximal Tubular Epithelial/Telomerase Reverse...

Area of Science:

• Biomedical Engineering
• Toxicology
• Renal Physiology

Background:

• Nephrotoxicity is a major challenge in drug development, often detected late in clinical trials.
• Traditional cell cultures fail to replicate kidney tissue complexity and function, leading to inaccurate toxicity predictions.
• The kidney's susceptibility to drug-induced damage necessitates improved preclinical assessment methods.

Purpose of the Study:

• To develop advanced in vitro kidney models that accurately mimic the renal proximal tubule.
• To create models capable of recapitulating physiological conditions like shear stress.
• To establish a more reliable platform for preclinical nephrotoxicity testing.

Main Methods:

• Development of a 2.5D model for hydrogel-free tubule structure generation.
• Implementation of a kidney-on-a-chip microfluidic model to apply physiological shear stress.
• Utilizing RPTEC/TERT1 cell line for both model systems.
• Testing model efficacy with known nephrotoxic compounds (cisplatin, tacrolimus, daunorubicin).

Main Results:

• Successfully generated kidney tubule-like structures in the 2.5D model.
• Successfully applied physiological shear stress in the kidney-on-a-chip model.
• Observed distinct cellular responses to nephrotoxic compounds in the developed models.
• Validated the models' potential for detecting drug-induced kidney damage.

Conclusions:

• The developed 2.5D and kidney-on-a-chip models offer a more physiologically relevant in vitro system for kidney research.
• These advanced models can significantly improve the early detection of drug nephrotoxicity.
• The models represent a valuable tool for preclinical drug safety evaluation, potentially reducing late-stage trial failures.