Navigation Links
Study suggests new source of kidneys for transplant
Date:5/20/2013

WINSTON-SALEM, N.C. May 20, 2013 Nearly 20 percent of kidneys that are recovered from deceased donors in the U.S. are refused for transplant due to factors ranging from scarring in small blood vessels of the kidney's filtering units to the organ going too long without blood or oxygen. But, what if instead of being discarded, these organs could be "recycled" to help solve the critical shortage of donor organs?

Researchers at Wake Forest Baptist Medical Center and colleagues, reporting in the journal Biomaterials, found that human kidneys discarded for transplant can potentially serve as a natural "scaffolding material" for manufacturing replacement organs in the lab using regenerative medicine techniques.

According to the authors, more than 2,600 donor kidneys are discarded each year in the U.S. "With about 100,000 people in the U.S. awaiting kidney transplants, it is devastating when an organ is donated but cannot be used," said Giuseppe Orlando, M.D., Ph.D., lead author, a Wake Forest Baptist transplant surgeon and regenerative medicine researcher. "These discarded organs may represent an ideal platform for investigations aimed at manufacturing kidneys for transplant."

The research involved pumping a mild detergent through kidneys that were refused for transplant. The goal of the process, called decellularization, is to remove all cells leaving only the organ structure or "skeleton," known in regenerative medicine terms as a scaffold. Ultimately, the patient's own cells could be placed in this scaffold, creating a customized organ that the patient theoretically would not reject.

In fact, an analysis of the decellularized organs revealed that antigens likely to cause an immune response were removed in the cleaning process. "This finding has significant implications," said Orlando. "It indicates that transplantation of such customized kidneys could be performed without the need for anti-rejection therapy. In addition, these kidneys maintain their innate three-dimensional architecture, their basic biochemistry, as well as their vessel network system. When we tested their ability to be transplanted (in pigs), these kidneys were able to maintain blood pressure, suggesting a functional and resilient vasculature."

While the project is in its infancy, the idea represents a potential solution to the extreme shortage of donor kidneys. According to the authors, the probability in the U.S. of receiving a kidney transplant within five years of being added to the waiting list is less than 35 percent, and people age 60 or older who are placed on the waiting list only have a 50 percent chance of ever receiving a kidney.

The science of regenerative medicine has already had success in engineering skin, cartilage, bladders, urine tubes, trachea and blood vessels in the lab that were successfully implanted in patients. Most of these structures were able to receive oxygen and nutrients from nearby tissues until they developed their own blood vessel supply. However, more complex organs such as the kidney, liver, heart and pancreas are larger with dense cellular networks and must have their own oxygen supply to survive. The need for a blood supply is why scientists are exploring the possibility of using donor organs and "seeding" them with a patient's own cells.

As the research continues, the scientists will need to assess whether discarded organs with certain defects can be used to benefit patients. For example, some kidneys are rejected because of fibrosis (scarring) in the tiny vessels throughout the organ. Can these organs be recycled? Orlando said that time will tell but that early clinical data suggests that fibrotic lesions are reversible and that the human body has the ability to remodel kidney fibrosis and restore normal anatomy.


'/>"/>

Contact: Karen Richardson
krchrdsn@wakehealth.edu
336-716-4453
Wake Forest Baptist Medical Center
Source:Eurekalert

Related medicine news :

1. Metal-on-Metal Hip Replacement Lawyers Note New Study Finding MRIs Can Be Used to Predict Metal-on-Metal Hip Implant Failure
2. Nighttime Docs at ICUs Dont Boost Patient Outcomes: Study
3. Study: Older Whooping Cough Vaccine More Effective
4. Study supports aggressive treatment for posterior fossa hematoma in newborns
5. Hospital emergency departments gaining in importance, study finds
6. 1 in 10 teens using study drugs, but parents arent paying attention
7. New study finds blind people have the potential to use their inner bat to locate objects
8. Women Less Likely to Get Trauma Center Care After Injury: Study
9. Atherosclerotic disease heredity mapped in nationwide study
10. New study suggests candy consumption frequency not linked to obesity or heart disease
11. Sleep Apnea in Seniors Tied to Alzheimers in Study
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:10/13/2017)... ... 2017 , ... Ellevate Network, the leading network for professional women, brought together ... equality at their inaugural Summit in New York City in June. The event was ... of over 3 million. To watch the Mobilize Women video, click here . ...
(Date:10/13/2017)... ... 13, 2017 , ... Coveros, a leader in agile coaching ... contract by the Center for Medicare and Medicaid Services (CMS). The Enterprise Agile ... of Agile methodologies in a consistent and high value manner across CMS programs. ...
(Date:10/12/2017)... ... October 12, 2017 , ... ... treating sleep apnea using cutting-edge Oventus O2Vent technology. As many as ... disorder characterized by frequent cessation in breathing. Oral appliances can offer significant relief ...
(Date:10/12/2017)... ... October 12, 2017 , ... The American College of ... Carol Friedman, PhD, FACMI, during the Opening Session of AMIA’s Annual Symposium in Washington, ... In honor of Morris F. Collen, a pioneer in the field of medical informatics, ...
(Date:10/12/2017)... PA (PRWEB) , ... October 12, 2017 , ... ... is the recipient of a 2017 Folio Magazine Eddie Digital Award for ‘Best B-to-B ... York City on October 11, 2017. , The annual award competition recognizes editorial and ...
Breaking Medicine News(10 mins):
(Date:10/5/2017)... ROSEMONT, Ill. , Oct. 5, 2017 /PRNewswire-USNewswire/ ... American Association of Oral and Maxillofacial Surgeons (AAOMS) ... than opioids – to be used as a ... post-surgical pain. ... relationship, the AAOMS White Paper "Opioid Prescribing: Acute ...
(Date:10/2/2017)... Oct. 2, 2017  Eli Lilly and Company (NYSE: ... for the third quarter of 2017 on Tuesday, October ... on that day with the investment community and media ... The conference call will begin at 9 a.m. Eastern ... a live webcast of the conference call through a ...
(Date:9/28/2017)... Cohen Veterans Bioscience and Early Signal Foundation announce a ... sensors for real-time monitoring of patients with trauma-related and ... focused on disruptive health solutions for rare disorders and ... record and integrate behavioral, cognitive, physiological and contextual data. ... ...
Breaking Medicine Technology: