Navigation Links
NYSCF and Columbia researchers demonstrate use of stem cells to analyze causes, treatment of diabetes
Date:6/17/2013

NEW YORK, NY (June 17, 2013) A team from the New York Stem Cell Foundation (NYSCF) Research Institute and the Naomi Berrie Diabetes Center of Columbia University has generated patient-specific beta cells, or insulin-producing cells, that accurately reflect the features of maturity-onset diabetes of the young (MODY).

The researchers used skin cells of MODY patients to produce induced pluripotent stem (iPS) cells, from which they then made beta cells. Transplanted into a mouse, the stem cell-derived beta cells secreted insulin in a manner similar to that of the beta cells of MODY patients. Repair of the gene mutation restored insulin secretion to levels seen in cells obtained from healthy subjects. The findings were reported today in the Journal of Clinical Investigation.

Previous studies have demonstrated the ability of human embryonic stem cells and iPS cells to become beta cells that secrete insulin in response to glucose or other molecules. But the question remained as to whether stem cell-derived beta cells could accurately model genetic forms of diabetes and be used to develop and test potential therapies.

"We focused on MODY, a form of diabetes that affects approximately one in 10,000 people. While patients and other models have yielded important clinical insights into this disease, we were particularly interested in its molecular aspectshow specific genes can affect responses to glucose by the beta cell," said co-senior author Dieter Egli, PhD, Senior Research Fellow at NYSCF, who was named a NYSCFRobertson Stem Cell Investigator in 2012.

MODY is a genetically inherited form of diabetes. The most common form of MODY, type 2, results in a loss-of-function mutation in one copy of the gene that codes for the sugar-processing enzyme glucokinase (GCK). With type 2 MODY, higher glucose levels are required for GCK to metabolize glucose, leading to chronic, mildly elevated blood sugar levels and increased risk of vascular complications.

MODY patients are frequently misdiagnosed with type 1 or 2 diabetes. Proper diagnosis can not only change the patient's course of treatment but affect family members, who were previously unaware that they, too, might have this genetic disorder.

NYSCF scientists took skin cells from two Berrie Center type 2 MODY patients and "reprogrammed"or revertedthem to an embryonic-like state to become iPS cells. To examine the effect of the GCK genetic mutation, they also created two genetically manipulated iPS cell lines for comparison: one fully functional (two correct copies of the GCK gene) and one with complete loss of function (two faulty copies of the GCK gene). They then generated beta cell precursors from the fully functional and loss-of-function iPS cell lines and transplanted the cells for further maturation into immune-compromised mice.

"Our ability to create insulin-producing cells from skin cells, and then to manipulate the GCK gene in these cells using recently developed molecular methods, made it possible to definitively test several critical aspects of the utility of stem cells for the study of human disease," said Haiqing Hua, PhD, lead author on the paper, a postdoctoral fellow in the Division of Molecular Genetics, Department of Pediatrics and Naomi Berrie Diabetes Center at Columbia University and the New York Stem Cell Foundation Research Institute.

When given a glucose tolerance test three months later, mice with MODY beta cells had decreased sensitivity to glucose but a normal response to other molecules that stimulate insulin secretion. This is the hallmark of MODY. Mice with two faulty copies of the GCK gene secreted no additional insulin in response to glucose. When the researchers repaired the GCK mutation using molecular techniques, cells with two restored copies of GCK responded normally to the glucose stress test. Unlike other reported techniques, the researchers' approach efficiently repaired the GCK mutation without introducing any potentially harmful additional DNA.

"Generation of patient-derived beta cells with gene correction could ultimately prove to be a useful cell-replacement therapy by restoring patients' ability to regulate their own glucose. This result is truly exciting," said Susan L. Solomon, Chief Executive Officer of The New York Stem Cell Foundation.

The researchers also used an electron microscope to assess beta cells for insulin content by counting granulespackages that store insulin for release. Even though all beta cell types had a similar number of granules, complete loss of function of the GCK gene was associated with decreased beta-cell production.

"These studies provide a critical proof-of-principle that genetic characteristics of patient-specific insulin-producing cells can be recapitulated through use of stem cell techniques and advanced molecular biological manipulations. This opens up strategies for the development of new approaches to the understanding, treatment, and, ultimately, prevention of more common types of diabetes," said co-senior author Rudolph Leibel, MD, Christopher Murphy Memorial Professor of Diabetes Research, Columbia University Medical Center, and Director, Division of Molecular Genetics, and Co-Director of the Naomi Berrie Diabetes Center.

The other authors are: Linshan Shang and Hector Martinez of the New York Stem Cell Foundation Research Institute; and Matthew Freeby, Mary Pat Gallagher, Thomas Ludwig, Liyong Deng, Ellen Greenberg, Charles LeDuc, Wendy K. Chung, and Robin Goland of the Division of Molecular Genetics, Department of Pediatrics, and Naomi Berrie Diabetes Center at Columbia University.


'/>"/>

Contact: David McKeon
dmckeon@nyscf.org
212-365-7440
New York Stem Cell Foundation
Source:Eurekalert

Related medicine news :

1. Columbia Nursing develops online tool to reduce stress in Hispanic caregivers of dementia patients
2. Luke Bryan Tickets: Luke Bryan Tickets Released for Concerts at Blossom Music Center in Cuyahoga Falls OH and at Merriweather Post Pavilion in Columbia MD on Fri. June 7
3. Columbia nursing study finds women less at risk than men for health-care-associated infections
4. Special Olympics Missouri Athletes Ready to Show Off Skills in Columbia
5. Columbia licenses novel 3-D organ and tumor segmentation software to Varian Medical Systems
6. Communities of Distinctions Presents Air Dates for Columbia, South Carolina
7. EcoVim Food Waste Reduction & Conversion System to Debut at Columbia Business School Symposium
8. Columbia experts at American Assoc. for Cancer Research 2013 Annual Meeting
9. Local Columbia Wellness Clinic, About Your Health, Announces GAPS Diet Practitioner
10. Snowstorms Blanketing the US Causing Major Outbreaks of Dry Skin, Columbia Healing Cream Reveals the Solution
11. Quality Associates to Digitize Confidential Case Files for the District of Columbia Courts
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:12/2/2016)... ... 02, 2016 , ... Mediaplanet is proud to announce the ... the innovative treatments, therapeutic technologies, and revolutionized nutrition that are helping patients and ... 6 years in the last 3 decades,” says Dr. Valentine Fuster, a world-renowned ...
(Date:12/2/2016)... ... December 02, 2016 , ... Universal ... systems and the first company to offer robotic imaging to veterinary medicine ... tradeshow booth # 941 for the American Association of Equine Practitioners 62nd Annual ...
(Date:12/2/2016)... (PRWEB) , ... December 02, 2016 , ... Yisrayl Hawkins, ... delves into how this current generation fits into Bible Prophecy. Yisrayl says this generation, ... facts pointing to this conclusion, showing how the details line up exactly with Bible ...
(Date:12/2/2016)... ... December 02, 2016 , ... On November 24th, 2016, ... from eight different sites throughout Miami-Dade and Broward counties. This is the largest ... hard on Thanksgiving morning by putting together individual meals via assembly lines and ...
(Date:12/2/2016)... ... December 02, 2016 , ... ‘Tis the season for giving! Today, 20 creative ... National Family Partnership and the Drug Enforcement Administration as part of the National Red ... 10 winning schools who decorated their campuses with this year’s Red Ribbon Week theme: ...
Breaking Medicine News(10 mins):
(Date:12/2/2016)... Dec. 2, 2016  PipelineRx, a leading medication management ... offering demonstrations of its SaaS-based telepharmacy platform, ... Pharmacists 2016 Midyear Clinical Meeting and Exhibition, December ... With nearly 300 hospital clients nationally, the Company ... designed to dramatically improve pharmacy operations, enhance patient ...
(Date:12/2/2016)... Va. , Dec. 2, 2016  The ... by the Academy of Managed Care Pharmacy (AMCP), ... organizations can better address the opioid addiction crisis, ... Assisted Therapies (MAT). ATAG,s newly released ... Improving Access to Naloxone," addresses many issues around ...
(Date:12/2/2016)... bioLytical Laboratories, ein Weltführer bei schnellen Tests für ... Apothekenbundes von Kenia eingeführt. Continue Reading ... ... Test! (PRNewsFoto/bioLytical Laboratories) ... http://photos.prnewswire.com/prnh/20161201/444905 ) bioLytical wurde durch die ...
Breaking Medicine Technology: