Stem-cell biology and gene editing advances offer hope for kidney regeneration, drug discovery
Mini-kidney organoids have now been grown in a laboratory by using genome editing to re-create human kidney disease in petri dishes.
The achievement, believed to be the first of its kind, resulted from combining stem cell biology with leading-edge gene-editing techniques.
The journal Nature Communications reports the findings today, Oct. 23. The work paves the way for personalized drug discovery for kidney disease.
The mini-kidney organoids were grown from pluripotent stem cells. These are human cells that have turned back the clock to a time when they could develop into any type of organ in the body. When treated with a chemical cocktail, these stem cells matured into structures that resemble miniature kidneys.
These organoids contain tubules, filtering cells and blood vessel cells. They transport chemicals and respond to toxic injury in ways that are similar to kidney tubules in people.
"A major unanswered question was whether we could re-create human kidney disease in a lab petri dish using this technology," said Benjamin Freedman, who led the studies at Brigham and Women's Hospital in Boston. He is now an assistant professor of medicine in the Division of Nephrology at the University of Washington and a UW Medicine researcher.
"Answering this question," he said, "was important for understanding the potential of mini-kidneys for clinical kidney regeneration and drug discovery."
To re-create human disease, Freedman and his colleagues used the gene-editing technique called CRISPR. They engineered mini-kidneys with genetic changes linked to two common kidney diseases, polycystic kidney disease and glomerulonephritis.
The organoids developed characteristics of these diseases. Those with mutations in polycystic kidney disease genes formed balloon like, fluid filled sacks, called cysts, from kidney tubules. The organoids with mutations in podocalyxin, a gene linked to glomerulonephritis, lost connections between filtering cells.
"Mutation of a single gene results in changes kidney structures associated with human disease, thereby allowing better understand of the disease and serving as models to develop therapeutic agents to treat these diseases," explained Joseph Bonventre, senior author of the study. He is chief of the Renal Division at Brigham and Women's Hospital and a principal faculty member at Harvard Stem Cell Institute.
"These genetically engineered mini-kidneys," Freedman added, "have taught us that human disease boils down to simple components that can be re-created in a petri dish. This provides us with faster, better ways to perform 'clinical trials in a dish' to test drugs and therapies that might work in humans."
The researchers found that genetically matched kidney organoids without disease-linked mutations showed no signs of either disease.
"CRISPR can be used to correct gene mutations," explained Freedman. "Our findings suggest that gene correction using CRISPR may be a promising therapeutic strategy."
In the United States, costs for kidney disease are about 40 billion dollars per year. Kidney disease affects approximately 700 million people worldwide. Twelve million patients have polycystic kidney disease and two million gave complete kidney failure. Dialysis and kidney transplantation, the only options for patients in kidney failure, can cause harmful side effects and poor quality-of-life.
"As a result of this new technology," Freedman said, "we can now grow, on demand, new kidney tissue that is 100 percent immunocompatible with an individual's own body."
He added, "We have shown that these tissues can mimic both healthy and diseased kidneys, and that the organoids can survive in mice after being transplanted. The next question is whether the organoids can perform the functions of kidneys after transplantation."
The study co-authors include Paul Lerou, Jing Zhou, Theodore Steinman, Kelly McNagny, Kiran Musunuru, Craig Brooks, Albert Lam, Hongxia Fu, and Ryuji Morizane.
The work was supported by the National Institutes of Health National Institutes of Health grants DK092036, DK102826, DK864406, DK39773, DK072381, DK51050, DK099532, the NCATS Loan Repayment Program, the National Kidney Foundation, the Harvard Stem Cell Institute, the Institute for Stem Cell and Regenerative Medicine and the Kidney Research Institute, both at the University of Washington), and The Biomedical Research Centre at the University of British Columbia.
Bonventre holds patents on kidney injury molecule-1 which have been assigned to Partners Healthcare. The other researchers declare no competing interests.
Leila Gray | EurekAlert!
Finnish research group discovers a new immune system regulator
23.02.2018 | University of Turku
Minimising risks of transplants
22.02.2018 | Friedrich-Alexander-Universität Erlangen-Nürnberg
A newly developed laser technology has enabled physicists in the Laboratory for Attosecond Physics (jointly run by LMU Munich and the Max Planck Institute of Quantum Optics) to generate attosecond bursts of high-energy photons of unprecedented intensity. This has made it possible to observe the interaction of multiple photons in a single such pulse with electrons in the inner orbital shell of an atom.
In order to observe the ultrafast electron motion in the inner shells of atoms with short light pulses, the pulses must not only be ultrashort, but very...
A group of researchers led by Andrea Cavalleri at the Max Planck Institute for Structure and Dynamics of Matter (MPSD) in Hamburg has demonstrated a new method enabling precise measurements of the interatomic forces that hold crystalline solids together. The paper Probing the Interatomic Potential of Solids by Strong-Field Nonlinear Phononics, published online in Nature, explains how a terahertz-frequency laser pulse can drive very large deformations of the crystal.
By measuring the highly unusual atomic trajectories under extreme electromagnetic transients, the MPSD group could reconstruct how rigid the atomic bonds are...
Quantum computers may one day solve algorithmic problems which even the biggest supercomputers today can’t manage. But how do you test a quantum computer to...
For the first time, a team of researchers at the Max-Planck Institute (MPI) for Polymer Research in Mainz, Germany, has succeeded in making an integrated circuit (IC) from just a monolayer of a semiconducting polymer via a bottom-up, self-assembly approach.
In the self-assembly process, the semiconducting polymer arranges itself into an ordered monolayer in a transistor. The transistors are binary switches used...
Breakthrough provides a new concept of the design of molecular motors, sensors and electricity generators at nanoscale
Researchers from the Institute of Organic Chemistry and Biochemistry of the CAS (IOCB Prague), Institute of Physics of the CAS (IP CAS) and Palacký University...
15.02.2018 | Event News
13.02.2018 | Event News
12.02.2018 | Event News
23.02.2018 | Physics and Astronomy
23.02.2018 | Health and Medicine
23.02.2018 | Physics and Astronomy