Help
Subscribe


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

 19 April 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

Smoking affects type of IBD that develops is siblings with similar genetic susceptibility

Smoking is a strong environmental risk factor for Crohn's disease and may actually act on IBD genetic predisposition to shift the phenotype from ulcerative colitis towards Crohn's disease, finds a study reported in July's issue of Gut.

News image

fiogf49gjkf04

Researchers from England and Switzerland investigated whether smoking determines the type of inflammatory bowel disease (IBD) that develops in individuals with very similar genetic susceptibility.

Smoking tobacco is known to predispose to the development of Crohn's disease (CD), yet is associated with a reduced incidence of ulcerative colitis (UC).

Smoking habits and disease characteristics were analyzed in 242 IBD pedigrees (658 patients).

Within this group there were 339 affected sibling pairs, of whom 89 were discordant for smoking when diagnosed.

Odds ratios for smokers with IBD:
CD: 3.55
UC: 0.28
Gut

Smoking at diagnosis was associated with development of CD (odds ratio (OR) 3.55) in all of the familial patients, with increases when analyzed for ileocecal disease, fibrostenosis, and intestinal resection.

Smokers were also protected from UC (OR 0.28).

Of the 89 sibling pairs discordant for smoking at diagnosis, 23 were also discordant for disease type. In 21 of these pairs, CD occurred in the smoker and UC in the non-smoker (OR 10.5).

Author S. Bridger, of Guy's, King's, and St. Thomas's School of Medicine and Dentistry. London, England, said on behalf of the group, "Smoking is a strong environmental risk factor for CD and increases the likelihood of needing surgery.

"However, sib pairs who are discordant for both smoking and IBD type almost always show CD in the smoker and UC in the non-smoker.

"Therefore, in some cases tobacco consumption acts on IBD genetic predisposition to shift the phenotype from UC towards CD."

"The explanation of part of the apparent protective effect of smoking on sporadic UC may be that the form of IBD that develops in a proportion of smokers is not UC but CD," it was concluded.

Gut 2002; 51: 21-5
25 June 2002

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

 19 April 2018 
Fibrosis in patients with chronic hepatitis B
 19 April 2018 
c-Myc expression and pancreatic cancer
 19 April 2018 
Olmesartan prescription in the USA
 18 April 2018 
Online tool predicts bowel dysfunction severity prior to anterior resection
 18 April 2018 
Hep C treatment for sustained virologic response
 18 April 2018 
Endoscopic necrosectomy reduces risk of death 
 17 April 2018 
Colorectal cancer screening and ethnic inequities
 17 April 2018 
Training programs should consider radiation education for advanced endoscopy fellows
 17 April 2018 
Aspirin and pancreatic cancer
 16 April 2018 
Surgery for colorectal polyps has increased 
 16 April 2018 
Advanced fibrosis can be ruled out in primary health care patients
 16 April 2018 
Antibiotic use and colorectal adenoma
 13 April 2018 
Colorectal cancer cell lines
 13 April 2018 
Infliximab and corticosteroid-free clinical remission in Crohn's
 13 April 2018 
Teduglutide for children with short bowel syndrome
 12 April 2018 
Prescriptions for opiate drugs amongst primary care patients with IBD
 12 April 2018 
Lower GI bleeding related to comorbidity
 12 April 2018 
non–Clostridium difficile bacterial infections in IBD
 11 April 2018 
Physician perception of IBD trial results
 11 April 2018 
Bile acid deficiency in IBS 
 11 April 2018 
Stem cell therapy for fistulas in Crohn's
 10 April 2018 
Overweight in childhood and type 2 diabetes
 10 April 2018 
immunoglobulin G associates with clinical features of IBD
 10 April 2018 
T-cells repertoires in celiac disease
 09 April 2018 
Biomarker tests for colorectal cancer screening
 09 April 2018 
Fecal transplantation in C. difficile infection and treatment outcome 
 09 April 2018 
No weigh-loss drug improved all cardiometabolic risk factors
 06 April 2018 
Colonoscopy and colorectal cancer mortality
 06 April 2018 
Eosinophilic esophagitis and health-related quality of life
 06 April 2018 
Microbiome in athletes vs sedentary subjects
 05 April 2018 
Laparoscopic Nissen fundoplication for GERD treatment
 05 April 2018 
Random biopsies for neoplasia in IBD
 05 April 2018 
Scoring system identifies cancer risk in Barrett's
 04 April 2018 
Alpha‐1 antitrypsin deficiency and liver disease
 04 April 2018 
PPI and risk of stroke
 04 April 2018 
Adjuvant chemotherapy for advanced colon cancer
 29 March 2018 
Worldwide H.pylori prevalence
 29 March 2018 
Prevention of metachronous gastric cancer
 29 March 2018 
Acute lower GI bleeding
 28 March 2018 
Decision aid used by IBD patients
 28 March 2018 
Transition for young adults with IBD
 28 March 2018 
Amitriptyline in functional dyspepsia
 27 March 2018 
Emergency department utilization for IBD 
 27 March 2018 
Management of hemorrhoids in the USA
 27 March 2018 
Adult ulcerative colitis
 26 March 2018 
Biological therapy response in IBD 
 26 March 2018 
Obesity and diverticulosis
 26 March 2018 
Practice guidelines for chronic constipation
 23 March 2018 
Health-related quality of life in eosinophilic esophagitis
 23 March 2018 
Genetics and chronic liver disease
 23 March 2018 
Global prevalence of H.pylori
 22 March 2018 
H. pyloris and gastric cancer
 22 March 2018 
Pancreatitis after IBS treatment 
 22 March 2018 
Mechanisms of action in patients with IBS
 21 March 2018 
Panel markers for early detection of colon cancer

 21 March 2018 
Blood test differentiates celiac disease
 21 March 2018 
Patient characteristics and colonoscopy preparation
 20 March 2018 
Bloody vs coffee-grounds hematemesis
 20 March 2018 
Acute lower GI bleeding in the UK
 20 March 2018 
Therapeutic strategies for IBD

Blackwell Publishing


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