Help
Subscribe


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

 25 August 2016

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

Hep B vaccine protects future infection but does not provide sterilizing immunity 

The latest issue of Gastroenterology reports that hepatitis B vaccine protects re-exposed health care workers, but does not provide sterilizing immunity.

News image

Infection with hepatitis B virus (HBV) can be prevented by vaccination with HB surface (HBs) antigen, which induces HBs-specific antibodies and T cells. However, the duration of vaccine-induced protective immunity is poorly defined for health care workers who were vaccinated as adults.

Dr Barbara Rehermann and colleagues from Maryland, USA investigated the immune mechanisms of long-term protection by the HBV vaccine in 90 health care workers with or without occupational exposure to HBV, 10−28 years after vaccination.

The researchers found that 65% of health care workers had levels of antibodies to HBs antigen above the cut-off, and 33% had HBs-specific T cells that produced interferon-gamma.

Titers of antibodies to HBs antigen correlated with numbers of HBs-specific interferon-gamma−producing T cells, but not with time after vaccination.

65% of health care workers had levels of antibodies to HBs antigen above the cut-off
Gastroenterology

Although occupational exposure to HBV after vaccination did not induce antibodies to the HBV core protein (HBcore), the standard biomarker for HBV infection, CD4+ and CD8+ T cells against HBcore and polymerase antigens were detected.

The research team noted that similar numbers of HBcore- and polymerase-specific CD4+ and CD8+ T cells were detected in health care workers with occupational exposure to HBV and in patients who acquired immunity via HBV infection.

Most of the HBcore- and polymerase-specific T cells were CD45RO+CCR7−CD127− effector memory cells in exposed health care workers, and in patients with acquired immunity.

In contrast, the team noted that most of the vaccine-induced HBs-specific T cells were CD45RO−CCR7−CD127− terminally differentiated cells.

Dr Rehermann's team commented, "HBs antigen vaccine-induced immunity protects against future infection but does not provide sterilizing immunity, as evidenced by HBcore- and polymerase-specific CD8+ T cells in vaccinated health care workers with occupational exposure to HBV."

"The presence of HBcore- and HBV polymerase-specific T-cell responses is a more sensitive indicator of HBV exposure than detection of HBcore-specific antibodies."

Gastroenterol 2013: 145(5): 1026-1034
01 November 2013

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

 25 August 2016 
Short-chain fatty acids in mixed refractory constipation
 25 August 2016 
Stool DNA test for colorectal cancer screening
 25 August 2016 
Post-infectious IBS in C. diff
 24 August 2016 
Hep B after infant vaccination program
 24 August 2016 
Obeticholic acid for primary biliary cholangitis
 24 August 2016 
Genetics and therapy response in IBD
 23 August 2016 
Colorectal cancer genetics as biomarkers
 23 August 2016 
Prognostic test for mortality after liver transplant
 23 August 2016 
Postoperative mortality in elderly with IBD
 22 August 2016 
Celiac disease in the elderly
 22 August 2016 
Laparoscopic vs open colectomy databases
 22 August 2016 
Mucosal healing and ulcerative colitis outcomes
 19 August 2016 
Dietary questionnaire for GI clinics
 19 August 2016 
Botox treatment for chronic anal fissure
 19 August 2016 
Myeloid-derived suppressor cells in GI cancers
 18 August 2016 
Gallstone formation determinants
 18 August 2016 
Age disparities in IBD therapy
 18 August 2016 
Seasonal variation in diverticulitis
 17 August 2016 
IBD activity score for routine clinical use
 17 August 2016 
Attitudes to H. pylori in primary care
 17 August 2016 
Nonselective β-blockers and mortality in cirrhosis
 16 August 2016 
Upper GI lesions in adults with IBD
 16 August 2016 
C. difficile infection and mortality when managed by GI surgeons
 16 August 2016 
HCV eradication in cirrhosis
 15 August 2016 
Predicting favorable outcomes in IBD
 15 August 2016 
Scoring system predicted microscopic colitis
 15 August 2016 
Mortality in spontaneous bacterial peritonitis
 12 August 2016 
Recurrence of resected gastric cancer
 12 August 2016 
Screening for pancreatic cancer
 12 August 2016 
Index for diagnostic accuracy of Crohn's
 11 August 2016 
Colorectal neoplasm on surveillance colonoscopies
 11 August 2016 
Bowel disease in primary care patients with bowel symptoms
 11 August 2016 
Diagnosis in covert hepatic encephalopathy
 10 August 2016 
Maintenance therapy for children with eosinophilic esophagitis
 10 August 2016 
Moderate alcohol use and insulin action in HCV
 10 August 2016 
Consensus on the management of GERD
 09 August 2016 
Pancreatitis quality of life instrument
 09 August 2016 
Gallstone disease and NAFLD
 09 August 2016 
Steroid dependency and IBD
 08 August 2016 
Venous thromboembolism in celiac disease
 08 August 2016 
C. diff in IBD 
 08 August 2016 
Gut-directed hypnotherapy vs low FODMAP diet in IBS
 05 August 2016 
Therapy for H.pylori treatment
 05 August 2016 
Obesity and the development of NAFLD
 05 August 2016 
Obesity and CVD in celiac disease
 04 August 2016 
Bleeding after endoscopic resection of colorectal lesions
 04 August 2016 
Novel risk factor for post-ERCP pancreatitis
 04 August 2016 
Ondansetron for children with acute gastroenteritis
 03 August 2016 
Post-colonoscopy complications
 03 August 2016 
IVF in women with IBD
 03 August 2016 
Post-operative pancreatic fistulae after pancreatic surgery
 02 August 2016 
H. pylori in children
 02 August 2016 
Gastric cancer in patients with gastric intestinal metaplasia
 02 August 2016 
Behavioral changes and bariatric surgery
 01 August 2016 
Relapse after cessation of oral antiviral treatment in Hep B
 01 August 2016 
Antimicrobial resistance of H. pylori
 01 August 2016 
Colorectal cancers in IBD
 29 July 2016 
Susceptibility loci for gallstone disease
 29 July 2016 
H. pylori clarithromycin resistance in the USA
 29 July 2016 
Tool to diagnose Helicobacter-negative gastritis

Blackwell Publishing


GastroHep.com is a Blackwell Publishing registered trademark
© 2016 Wiley-Blackwell and GastroHep.com and contributors
Privacy Statement
Disclaimer
About Us