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Why is kidney regeneration technically challenging?

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stem cell research — regenerative medicine A scientist conducting research on stem cells.

In the field of regenerative medicine, kidney regeneration is considered exceptionally challenging due to the organ's intricate structural design and the complex physiological functions it performs.1

The kidney is a highly specialized organ composed of approximately 1,000,000 to 1,250,000 nephrons in humans, which are responsible for filtering blood, reabsorbing nutrients, and maintaining water balance. Successfully regenerating this organ requires replicating its complex architecture, including the distinct cortex and medulla frameworks, as well as the delicate system of collecting tubules and ureters necessary for urine transport.231

While researchers have made progress using decellularized scaffolds to create bioengineered kidneys, these efforts currently face significant hurdles in achieving full functional capacity. Achieving the necessary level of biological organization to restore the kidney's multifaceted role in homeostasis remains a primary obstacle in the development of bioartificial organs.1