Navigation Links
Key signal that prompts production of insulin-producing beta cells points way toward diabetes cure
Date:9/12/2011

Jerusalem, Sept. 11, 2011 -- Researchers at the Hebrew University of Jerusalem have identified the key signal that prompts production of insulin-producing beta cells in the pancreas -- a breakthrough discovery that may ultimately help researchers find ways to restore or increase beta cell function in people with type 1 diabetes.

The work on the multi-year project was led by Prof. Yuval Dor of the Institute for Medical Research Israel-Canada of the Hebrew University, researchers from the Hadassah University Medical Center and researchers from the diabetes section of the Roche pharmaceuticals company. The study was published in a recent issue of the journal Cell Metabolism.

"Our work shows that as the glucose level is increased in the blood, it tells the beta cells to regenerate," says Dor. "It's not blood glucose per se that is the signal, but the glucose-sensing capacity of the beta cell that's the key for regeneration." This was the first time that this sensing of a high level of glucose has been shown to be the "trigger" that induces beta cells to regenerate.

In persons suffering from type 1 (juvenile) diabetes, the immune system launches a misguided attack on the insulin-producing beta cells, resulting in the cells' decline of insulin production and eventual loss of function.

Without insulin, the body's cells cannot absorb glucose from the blood and use it for energy. As a result, glucose accumulates in the blood, leaving the body's cells and tissues starved for energy. That's why people with the disease must inject insulin and monitor their blood glucose levels diligently every day. To cure type 1 diabetes, it will be necessary to develop methods to increase beta cell replication and mass, hence the potential therapeutic importance of the current study.

In their work, Dor, along with co-lead author Prof. Benjamin Glaser of the Hadassah University Medical Center, used a genetic system to destroy 80 percent of the insulin-producing cells in the pancreases of adult mice, rendering the mice diabetic.

When the researchers compared these mice with control mice, they found that those mice with diabetes and elevated blood glucose levels had regenerated a greater number of new beta cells than mice without diabetes, suggesting that glucose may be a key player in beta cell regeneration. But the researchers further found that a glucose-sensing enzyme in the cells, glucokinase, is the key molecule that triggers the beta cell regeneration.

"This means that the more work that beta cells are required to do (that is, the more 'stressed' they are), the more of themselves they make," said graduate student Shay Porat, who, along with fellow graduate student Noa Weinberg, spearheaded the study, which was funded with the support of the Juvenile Diabetes Research Foundation (JDRF). .

Because this study showed that regeneration depends on glucokinase levels, the finding may pave the way for developing a new kind of drug to modulate glucokinase or other steps in the glucose-sensing pathway to direct beta cells down the path of regeneration and replication.

And, should a mechanism be discovered that prevents the immune system from attacking beta cells in the first place, as occurs among diabetics, the combined treatment could help pave the way towards a full cure for type 1 diabetes.

Further research in this area is proceeding, with the eventual goal of progressing towards human clinical trials.


'/>"/>

Contact: Jerry Barach
jerryb@savion.huji.ac.il
972-258-82904
The Hebrew University of Jerusalem
Source:Eurekalert  

Related medicine news :

1. Epigenetic signals differ across alleles
2. Defective signaling pathway sheds light on cystic fibrosis
3. Arsenic exposure activates an oncogenic signaling pathway; leads to increased cancer risk
4. New Cancer-Fighting Strategy Focuses On Signaling Molecules
5. Different signaling pathways of cholangiocarcinoma
6. Higher anxiety, depression among women may have basis in cell signals
7. A high-fat diet alters crucial aspects of brain dopamine signaling
8. Rheumatoid arthritis signaling protein reverses Alzheimers disease in mouse model
9. Watercress may turn off breast cancer signal
10. UCLA cancer researchers discover new signaling pathway that controls cell development and cancer
11. BUSM researchers show an oncolytic virus switches off cancer cell survival signal
Post Your Comments:
*Name:
*Comment:
*Email:
Related Image:
Key signal that prompts production of insulin-producing beta cells points way toward diabetes cure
(Date:5/27/2016)... ... , ... W.S. Badger Co. Inc ., the maker of certified organic ... one of the best small businesses for new dads by Fatherly, the digital lifestyle ... providing progressive benefits to new parents on the organization’s 2016 Best Places to ...
(Date:5/27/2016)... ... May 27, 2016 , ... This campaign aims to provide a path ... a society can control and change. , As nearly 795,000 Americans suffering from a ... the United States. Plus, with an estimated 129,000 of these people dying from stroke, ...
(Date:5/27/2016)... ... ... Beleza Medspa has initiated a new program to assist active duty ... that Coolsculpting is being used for for more than just cosmetic purposes. ... prescribed body-fat standard, measured by the circumference-based tape method. The tape-test is used ...
(Date:5/27/2016)... Wis. (PRWEB) , ... May 27, 2016 , ... ... $90,000 in scholarships to students studying complementary medicine. Allison Outerbridge is this year’s ... accepted her award on May 18 at the university’s Student Leadership Awards ceremony. ...
(Date:5/26/2016)... DC (PRWEB) , ... May 26, 2016 , ... There ... National Hot Dog and Sausage Council (NHDSC) suggests that Americans prefer their dogs straight ... dogs, 63 percent say grilling is their favorite way to cook a hot dog, ...
Breaking Medicine News(10 mins):
(Date:5/26/2016)... , May 26, 2016   ... software and analytics, network solutions and technology-enabled ... announced it entered into a strategic channel ... of outpatient software solutions and revenue cycle ... specialty hospitals and rehabilitation clinics to optimize ...
(Date:5/25/2016)... HILDEN , Deutschland und GERMANTOWN, ... Zusammenarbeit mit Therawis bedient ... Entscheidungen bei Brustkrebs   QIAGEN N.V. ... QIA) gab heute bekannt, eine Lizenz- und Entwicklungsvereinbarung ... prädiktiver Assays für die Onkologie eingegangen zu sein. ...
(Date:5/25/2016)... According to market research "Global ... Demand Forecast to 2022 - Industry Insights by Type ... by P&S Market Research, the global insulin delivery device ... it is expected to grow at a CAGR of ... segment is expected to witness the fastest growth at ...
Breaking Medicine Technology: