Featured Research

from universities, journals, and other organizations

Most Important Candidate Genes For Pancreatic Stone Formation Identified

Date:
November 18, 2007
Source:
World Journal of Gastroenterology
Summary:
Chronic pancreatitis, an inflammatory condition of the pancreas, is usually associated with parenchymal calcification and multiple stones in the pancreatic duct. Lithostathine, a major proteic component of pancreatic stones, is thought to play an important role in stone formation. A research group from India has investigated if mutations in the gene encoding lithostathine (reg1) are responsible for stone formation, using tropical calcific pancreatitis as their model of chronic pancreatitis.

Stone formation is an important feature of chronic pancreatitis, especially tropical calcific pancreatitis (TCP), where the stones are large in size, highly irregular in shape and cause enormous tissue destruction. The exact mechanism of stone formation is not well-understood.

It is very important to understand the initial event so that stone formation can be controlled before it causes obstruction and damage to the pancreatic tissue. One such study was recently reported in the November 28 issue of the World Journal of Gastroenterology.

In an attempt to understand the initiating event in stone formation in chronic pancreatitis, Dr. Chandak and his group initiated this study. Protein plug formation is an important primary event in the final stone formation and hence some proteins must be increased in their concentration in the pancreatic juice.

Lithostathine (encoded by reg1 gene) has been isolated as a major protein component from stones of alcoholic chronic pancreatitis patients, and has been found to be 2 to 3 times less abundant in the pancreatic juice of chronic pancreatitis patients than in controls. Although the exact function of reg1 protein is not clear, it has been proposed to regulate the process of stone formation.

The team proposed that mutations in the promoter region of reg1 could lead to altered levels of the protein, or that the gene variants could predispose the reg1 protein to increased cleavage by trypsin and form fibrils that may precipitate and obstruct the duct by forming protein plugs and calculi. The interaction between pancreatic inflammation and stone formation in chronic pancreatitis is also not well understood; this study also investigated the interaction between the reg1 gene and the established susceptibility genes for TCP, such as pancreatic secretory trypsin inhibitor and cathepsin B (encoded by SPINK1 and CTSB respectively).

On testing the hypothesis in a large cohort of ethnically matched TCP patients and normal individuals, Dr. Chandak and his group discovered that mutations in reg1, including those in the regulatory region either independently or in the presence of known mutations in SPINK1 and/or CTSB, might not be a cause of stone formation in TCP patients. This opens up scope for further research on alternative mechanisms, such as calcium signaling and regulation in stone formation in chronic pancreatitis.

The observations made by this study thus contribute significantly by ruling out the role of one of the most important candidate genes for pancreatic stone formation.

Reference: Mahurkar S, Bhaskar S, Reddy DN, Rao GV, Chandak GR. Comprehensive screening for reg1alpha gene rules out association with tropical calcific pancreatitis. World J Gastroenterol 2007; 13(44): 5938-5943


Story Source:

The above story is based on materials provided by World Journal of Gastroenterology. Note: Materials may be edited for content and length.


Cite This Page:

World Journal of Gastroenterology. "Most Important Candidate Genes For Pancreatic Stone Formation Identified." ScienceDaily. ScienceDaily, 18 November 2007. <www.sciencedaily.com/releases/2007/11/071113132316.htm>.
World Journal of Gastroenterology. (2007, November 18). Most Important Candidate Genes For Pancreatic Stone Formation Identified. ScienceDaily. Retrieved September 2, 2014 from www.sciencedaily.com/releases/2007/11/071113132316.htm
World Journal of Gastroenterology. "Most Important Candidate Genes For Pancreatic Stone Formation Identified." ScienceDaily. www.sciencedaily.com/releases/2007/11/071113132316.htm (accessed September 2, 2014).

Share This




More Health & Medicine News

Tuesday, September 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Get on Your Bike! London Cycling Popularity Soars Despite Danger

Get on Your Bike! London Cycling Popularity Soars Despite Danger

AFP (Sep. 1, 2014) Wedged between buses, lorries and cars, cycling in London isn't for the faint hearted. Nevertheless the number of people choosing to bike in the British capital has doubled over the past 15 years. Duration: 02:27 Video provided by AFP
Powered by NewsLook.com
Can You Train Your Brain To Eat Healthy?

Can You Train Your Brain To Eat Healthy?

Newsy (Sep. 1, 2014) New research says if you condition yourself to eat healthy foods, eventually you'll crave them instead of junk food. Video provided by Newsy
Powered by NewsLook.com
We've Got Mites Living In Our Faces And So Do You

We've Got Mites Living In Our Faces And So Do You

Newsy (Aug. 30, 2014) A new study suggests 100 percent of adult humans (those over 18 years of age) have Demodex mites living in their faces. Video provided by Newsy
Powered by NewsLook.com
Liberia Continues Fight Against Ebola

Liberia Continues Fight Against Ebola

AFP (Aug. 30, 2014) Authorities in Liberia try to stem the spread of the Ebola epidemic by raising awareness and setting up sanitation units for people to wash their hands. Duration: 00:41 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:
from the past week

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins