Navigation Links
Life-extending protein keeps blood sugar in check

A protein that extends lifespan in yeast, worms, and flies keeps blood sugar under control in mice, reports a new study in the August Cell Metabolism. The findings suggest therapeutic interventions for the prevention and treatment of metabolic disorders, such as type 2 diabetes, which frequently arise with age, the researchers said.

The team found that mice with an excess of the protein Sirt1 in cells of the pancreas have improved glucose tolerance and enhanced insulin secretion in response to glucose. Glucose is the principal circulating sugar in the blood and the major energy source of the body.

"Mice with an increased amount of Sirt1 show a better response to high blood glucose levels that regularly occur after eating sweets, such as cookies or cakes," said Shin-ichiro Imai of Washington University School of Medicine. "The mice respond fast to high glucose by raising insulin levels, clearing the blood of the circulating sugar."

"Under normal feeding conditions, when glucose levels are lower, the mice with elevated Sirt1 appear normal," Imai added. "This is good news, suggesting that therapies designed to manipulate the amount of Sirt1 might improve insulin response in those with type 2 diabetes without causing other problems."

Pancreatic b cells have a highly coordinated mechanism that senses rises in blood glucose and converts that information into signals that increase the secretion of insulin, Imai explained. Insulin produced by the pancreas allows cells to take up glucose from the bloodstream and burn it for energy. A failure to make or respond to insulin in people with diabetes causes blood sugar levels to rise.

The researchers found that Sirt1 is present in pancreas cells that secrete insulin hormone. Mice genetically modified to have an excess of Sirt1 in b cells of the pancreas had improved glucose tolerance and enhanced insulin secretion in response to glucose.

The altered mice maintained their improved b ce ll function with age, they reported. Further analyses found that Sirt1 regulates genes involved in insulin secretion by b cells.

"Together, these results establish that an increase dosage of Sirt1 has beneficial effects on mammalian physiology," Imai said. "Our findings also provide new insight into the physiological and molecular functions of Sirt1 in glucose metabolism and suggest therapeutic interventions for the prevention and treatment of diabetes and other age-associated metabolic disorders."


'"/>

Source:Cell Press


Related biology news :

1. New, automated tool successfully classifies and relates proteins in unprecedented way
2. New binding target for oncogenic viral protein
3. Controversial drug shown to act on brain protein to cut alcohol use
4. Timing is everything: First step in protein building revealed
5. UWs Rosetta software to unlock secrets of many human proteins
6. Researchers find how protein allows insects to detect and respond to pheromones
7. Signaling protein builds bigger, better bones in mice
8. Ancient olfaction protein is shared by many bugs, offering new pest control target
9. Automatic extraction of gene/protein biological functions from biomedical text
10. Discovery of key proteins shape could lead to improved bacterial pneumonia vaccine
11. Scientists develop new color-coded test for protein folding
Post Your Comments:
*Name:
*Comment:
*Email:


(Date:3/24/2017)... The Controller General of Immigration from Maldives Mr. Mohamed ... received the prestigious international IAIR Award for the most innovative high security ... ... Maldives Immigration Controller General, ... picture on the right) have received the IAIR award for the "Most ...
(Date:3/23/2017)... 2017 The report "Gesture Recognition and Touchless Sensing Market ... - Global Forecast to 2022", published by MarketsandMarkets, the market is expected to ... between 2017 and 2022. Continue Reading ... ... ...
(Date:3/22/2017)... 21, 2017   Neurotechnology , a provider ... today announced the release of the SentiVeillance ... improved facial recognition using up to 10 surveillance, ... computer. The new version uses deep neural-network-based facial ... it utilizes a Graphing Processing Unit (GPU) for ...
Breaking Biology News(10 mins):
(Date:6/28/2017)... CHAPEL, Fla. , June 28, 2017 ... help Universities boost their STEM education and research dollars. ... students with the latest fiber optic spectroscopy and photonics ... the program are: ... starting at 10% of equipment purchases used for the ...
(Date:6/28/2017)... CA (PRWEB) , ... June 28, 2017 , ... ... in the international market with three research projects accepted for presentation at the ... (ESHRE) . Nearly 10,000 participants – including some of the world’s top thought ...
(Date:6/28/2017)... ... 2017 , ... Supplies of the critical medical isotope molybdenum-99 (Mo-99) are secure ... Nuclear Medicine and Molecular Imaging (SNMMI) 2017 annual meeting in Denver, Colorado in June. ... to 40 million nuclear medicine procedures worldwide every year. (1) , Sally Schwarz, ...
(Date:6/27/2017)... ... June 27, 2017 , ... Brain State Technologies, a ... campaign on June 15th to fund production of the new B2v2 wearable brainwave ... Kickstarter goal by more than 150% in a little over a week. , ...
Breaking Biology Technology: