Navigation Links
Fetal Gene May Contribute to Diabetes Risk
Date:5/8/2008

Study finds it plays key role in development of defective cells in type 2 diabetics

THURSDAY, May 8 (HealthDay News) -- Reduced activity of an important gene during fetal development appears to increase vulnerability to type 2 diabetes later in life, new research suggests.

Intrauterine growth retardation (IUGR), which causes low birth weight in newborns, has been linked to the development of type 2 diabetes and other diseases when a child grows up.

And decreased activity of the Pdx1 gene during fetal development has been linked to susceptibility for type 2 diabetes later on. The gene plays an important role in the development and function of pancreatic beta cells, which produce the hormone insulin. Insulin is necessary to transport sugar from the blood stream to the body's cells for energy. People with diabetes either don't produce enough insulin or aren't sensitive enough to the insulin that is produced.

The Pdx1 gene, however, had no mutation in animals with IUGR, presenting a mystery to scientists: If there is no mutation, why is the gene permanently altered?

"What happens in the intra-uterine environment? Why does that lead to the development of diabetes later in life?" asked Dr. Rebecca A. Simmons, senior author of a paper published in the May issue of the Journal of Clinical Investigation.

"What in intra-uterine life makes that beta cell not work properly even after you've been born into a normal environment?" added Simmons, an associate professor of pediatrics at the University of Pennsylvania School of Medicine.

Using a rodent model of IUGR, the researchers found that "epigenetic" changes were responsible for the lowered activity -- the gene was not totally silenced but was "markedly reduced," Simmons said. Epigenetic changes are basically changes in the structure of the DNA that occur when the cell divides and the DNA is replicated. These changes interfere with the ability of DNA to be transcribed, or send messages out to the rest of the body, she said.

Researchers were previously able to normalize the activity of the Pdx1 gene in both newborn and adult animals with diabetes, using the drug Byetta (Exendin-4). It's not clear yet if the drug can also reverse epigenetic changes. The drug comes from Gila monster saliva, Simmons said.

But investigators face a huge technical hurdle trying to confirm these findings in humans.

"We do know this process [gene silencing] occurs in humans, particularly in cancer with tumor suppressor genes," Simmons explained. "What we don't know is if this process is responsible, in humans, for changes that we see in growth-retarded babies growing up."

"We'd like to think this is the case [that the same process is at work in humans], but we have no way right now to determine that," Simmons continued.

If the same mechanism is at work in humans, the Pdx1 gene may present a good target for drug therapy to prevent the development of type 2 diabetes, she said.

More information

Visit the American Diabetes Association for more on type 2 diabetes.



SOURCES: Rebecca A. Simmons, M.D., associate professor, pediatrics, University of Pennsylvania School of Medicine, Philadelphia; May 2008 Journal of Clinical Investigation


'/>"/>
Copyright©2008 ScoutNews,LLC.
All rights reserved

Related medicine news :

1. Mothers Blood Could Offer Insights Into Fetal Health
2. Residual fetal cells in women may provide protection against breast cancer
3. Fetal cell transplant could be a hidden link between childbirth and reduced risk of breast cancer
4. Fetal Surgery Saves Baby After Early Water Break
5. Fetal heart rate yields clues to childrens later development
6. Fetal Heart Rate Points to Later Child Development
7. Fetal Exposure to Arsenic Affects Genes
8. Procedure to detect fetal heart defects is first automated use of 3-D ultrasound
9. Fetal Alcohol Exposure May Prime Offspring for Alcoholism
10. Fetal surgeon shows for first time that laser procedure may treat vasa previa
11. Eye Blinks May ID Fetal Alcohol Exposure
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:2/6/2016)... ... February 06, 2016 , ... ... , MEDIA ADVISORY: 5000 PERIOPERATIVE NURSES EXPECTED AT AORN SURGICAL CONFERENCE & ... nurses in the world with an estimated 5000 perioperative nurses in attendance ...
(Date:2/5/2016)... SARASOTA, Florida (PRWEB) , ... February 05, 2016 , ... ... an event he has completed every year since it started in 2003. This year, ... attracting the attention of fellow runners and NBA team the Miami Heat. , This ...
(Date:2/5/2016)... Minneapolis, MN (PRWEB) , ... February 05, 2016 , ... ... p.m. at the Day Block Event Center in Minneapolis, Minn. Triumph Over Parkinson’s will ... , Larry Schneiderman, owner of Schneiderman’s Furniture, lives with Parkinson’s disease and is the ...
(Date:2/5/2016)... ... 05, 2016 , ... After years as an active staff surgeon and having ... surgeon Dr. Wayne Carman transitioned to chief of the Division of Plastic Surgery at ... term as chief and began a second three-year term in January of 2016. , ...
(Date:2/5/2016)... ... , ... Regular gym users know the routine: each January, they see a ... treadmills. It’s a predictable trend. After the excesses of November and December, people make ... joining gyms, starting new walking or running routines, or signing up for Zumba. And ...
Breaking Medicine News(10 mins):
(Date:2/5/2016)... York , February 5, 2016 ... Transparency Market Research report states that the global active ... 2014 and is predicted to reach US$185.9 bn by ... of 6.50% from 2014 to 2020. The title of ... Chemical/Biological, Captive/Contract Manufactured, by Geography, and by Therapeutic Area) ...
(Date:2/5/2016)... MELVILLE, N.Y. , Feb. 5, 2016  Henry ... of health care products and services to office-based dental, ... has entered into an agreement to acquire a majority ... dental supplies and equipment in Brazil ... Headquartered in Blumenau, Brazil, Dental Cremer is the dental ...
(Date:2/4/2016)... , Feb. 4, 2016 For hospitals considering ... those already participating in the program, the Health Resources ... to as the , Mega-Guidance , could have significant ... is published in September 2016. Essential Insights ... Service Marketing , summarizes the Mega-Guidance,s key proposed changes, ...
Breaking Medicine Technology: