Help
Subscribe


GastroHep.com - the global online resource for all aspects of gastroenterology, hepatology and endoscopy

 22 May 2018

Advanced search
GastroHep.com - the global online resource for all aspects of gastroenterology, hepatology and endoscopy Profile of Roy Pounder

Home

News  
Journals
Review Articles
Slide Atlas
Video Clips
Online Books
Advanced Digestive Endoscopy
Classical Cases
Conference Diary
PubMed
International GH Links
USA GH Links
National GH Links
National GI Societies
Other Useful Links




Emails on Gastroenterology and Hepatology
the National AIDS Treatment Advocacy Project
Visit the gastroenterology section of the EUMS

News

New procedure for gliadin extraction for food products

A new complete gliadin extraction procedure based on reducing agents for both heated and unheated foods has been developed, and is used for corresponding proteins from rye and barley, finds the most recent issue of the European Journal of Gastroenterology and Hepatology.

News image

fiogf49gjkf04

In the past, one of the major problems in gluten analysis has been the unavailability of an efficient, universal, extraction procedure of gliadins - the alcohol-soluble proteins of gluten - from both heat processed and unprocessed products.

Dr Garcia and colleagues designed a study to develop a universal, extraction procedure capable of extracting the totality of gliadins from both unprocessed and heat processed foods for celiac patients.

The research team developed a simple quantitative extraction solution containing 250 mM 2-mercaptoethanol and 2 M guanidine hydrochloride ('cocktail'), to extract gliadins from heated foods.

The researchers mentioned that the diluted reducing and disaggregating agents reaching the micro plate at low concentration do not affect the ELISA system based on the R5 monoclonal antibody.

The recovery of gliadins with 2 M guanidine hydrochloride was 96 % versus 44 % with ethanol
European Journal of Gastroenterology and Hepatology

The invesitigators found that the recovery of gliadins extracted by the cocktail from spiked samples was nearly complete, with a mean value of 96 %, which is clearly superior to 44 % obtained with conventional 60 % aqueous ethanol.

The cocktail always yielded either slightly similar or higher values than 60 % aqueous ethanol depending on the type of foods:

The research team reported that the cocktail yielded values 1.1 fold in unheated foods, 1.4-fold in wheat starches and 3-fold in heated foods and false positives or negatives were never observed using the cocktail solution.

Dr Garcia concludes, “We present a general complete gliadin extraction procedure based on reducing and disaggregating agents for both heated and unheated foods as a crucial tool for gliadin analysis.”

“The new extraction solution is used for corresponding proteins from rye (secalins) and barley (hordeins).”

“The cocktail was employed as the extraction method in the international ring trial evaluation of sandwich R5-ELISA as proposed by the Codex Alimentarius and organized by the Working Group on Prolamin Analysis and Toxicity.”

Eur J Gastroenterol Hepatol 2005: 17(5): 529-539
21 April 2005

Go to top of page Email this page Email this page to a colleague

 22 May 2018 
Worldwide H.pylori prevalence
 22 May 2018 
PPI and risk of stroke
 22 May 2018 
Online tool predicts bowel dysfunction severity prior to anterior resection
 21 May 2018 
PPI use and cognitive decline
 21 May 2018 
Depressive symptoms in IBD youth
 21 May 2018 
Fecal incontinence and quality of life in IBD
 18 May 2018 
Esophageal dilatation in clinical practice 
 17 May 2018 
IBD and later extraintestinal manifestations
 17 May 2018 
Repeat stool DNA testing
 17 May 2018 
IBS and chronic fatigue following GI infection
 16 May 2018 
Factors associated with fecal incontinence
 16 May 2018 
Diagnostic delay in Crohn's disease
 16 May 2018 
Cardiovascular risk in diabetes mellitus with NAFLD
 15 May 2018 
Guidelines for management of Crohn's
 15 May 2018 
New therapies for CDI
 15 May 2018 
Hep B in the Grey Zone
 14 May 2018 
Blood test for the diagnosis of fibrotic NASH
 14 May 2018 
Outcomes at bariatric centers of excellence
 14 May 2018 
Management of perianal fistulas in Crohn’s
 11 May 2018 
Detection of undiagnosed celiac disease
 11 May 2018 
Alcohol consumption and drug-induced liver injury
 10 May 2018 
Colorectal cancer screening
 10 May 2018 
Post‐operative complications in elderly IBD
 10 May 2018 
Fibrosis in patients with chronic hepatitis B
 09 May 2018 
Esophageal dilatation in clinical practice 
 09 May 2018 
Fecal incontinence
 09 May 2018 
Health problems and IBS
 07 May 2018 
Health problems and IBS
 07 May 2018 
Assessment of diminutive colorectal polyps
 07 May 2018 
Omitting antibiotics in uncomplicated acute diverticulitis
 04 May 2018 
National Institutes of Health workshop and obesity
 04 May 2018 
Factors associated with fecal incontinence
 04 May 2018 
Colorectal cancer screening and ethnic inequities
 03 May 2018 
Gastrointestinal ultrasound in IBD
 03 May 2018 
Ultransonography in postsurgical recurrence in Crohn's
 02 May 2018 
Symptom assessment in cirrhotic ascites
 02 May 2018 
Hep C antiviral treatment and liver cancer risk
 02 May 2018 
Chronic Hep B
 01 May 2018 
European guidelines on pancreatic cystic neoplasms
 01 May 2018 
Interferon‐free regimens in Hep C
 01 May 2018 
Age at IBD onset and extraintestinal complications
 30 April 2018 
Formula for preterm infants
 30 April 2018 
Primary antibiotic resistance and sequential therapy for H. pylori
 30 April 2018 
Patient-reported outcome measures in IBD trials
 27 April 2018 
Anxiety scale for chronic esophageal disease
 27 April 2018 
Disease activity in eosinophilic esophagitis
 27 April 2018 
Eastern and western practices for endoscopic resection of colorectal lesions
 26 April 2018 
Obesity and physical activity in diverticulosis
 26 April 2018 
Primary sclerosing cholangitis in the USA
 25 April 2018 
Central mediators of irinotecan-induced steatohepatitis
 25 April 2018 
Aspirin and pancreatic cancer
 25 April 2018 
Neuroimaging in Hep C
 24 April 2018 
Scoring system identifies cancer risk in Barrett's
 24 April 2018 
Microbiome in athletes vs sedentary subjects
 23 April 2018 
Genome-wide study on HBV-related acute-on-chronic liver failure
 23 April 2018 
Antibody suitable for further clinical development to complement existing therapeutic strategies for HCV
 23 April 2018 
Sleep deprivation and NAFLD in the USA
 20 April 2018 
Two annexin A11 epitopes targeted by IgG1 and IgG4 autoantibodies were shared between patients with IAC/AIP and IgG4 antibodies blocked binding of IgG1 antibodies to the shared annexin A11 epitopes
 20 April 2018 
Adalimumab with azathioprine in Crohn's
 19 April 2018 
c-Myc expression and pancreatic cancer

Blackwell Publishing


GastroHep.com is a Blackwell Publishing registered trademark
© 2018 Wiley-Blackwell and GastroHep.com and contributors
Privacy Statement
Disclaimer
About Us