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Mini-kidneys successfully grown from stem cells

08 October 2015
Mini-kidney formed from human induced pluripotent stem cells [Courtesy Minoru Takasato]

Professor Melissa Little and her colleagues from Murdoch Childrens Research Institute have perfected a method of turning stem cells into mini-kidneys for use in drug screening, disease modelling and cell therapy.

By building on their research from 2013, the researchers have been able to grow an organ that forms all the different cell types normally present in the human kidney. 

Key to this breakthrough was adding different concentrations of growth factors at various times, allowing researchers mimicked normal development. The mini-kidney that the team produced is similar to the kidney of embryo developing foetus. 

Researchers say the advancement will also mean they can now tweak this process to optimise the amount of each cell type present.

The breakthrough could allow the use of mini-organs to screen drugs either for the treatment of kidney disease or to find out if a new drug is likely to injure the kidney. 

“The mini-kidney we have been able to grow is very complex and more like the real organ. This is important for drug testing as we hope they will respond to the drugs as a normal organ might,” Professor Little said. 

“Creating a model kidney containing many different kidney cell types also opens the door for cell therapy and even bioengineering of replacement kidneys. One day this may mean new treatments for patients with kidney failure.”

Importantly, the new method means researchers can make a miniature model kidney from any person, starting with cells such as skin or blood. 

“Making stem cells from patients with kidney disease, and then growing a mini-kidney that matches the patient, will help us understand that patient’s disease and develop treatments for them”.

The finding will also allow researchers to learn more about how the human kidney forms normally. 

The study, which was published today in Nature was conducted in conjunction with the Institute for Molecular Bioscience at the University of Queensland, as well as researchers from the Netherlands. 

Professor Melissa Little is a Chief Investigator in the Stem Cells Australia initiative