Published online Oct 28, 2015. doi: 10.3748/wjg.v21.i40.11273
Peer-review started: May 12, 2015
First decision: June 2, 2015
Revised: June 23, 2015
Accepted: August 30, 2015
Article in press: August 31, 2015
Published online: October 28, 2015
Processing time: 177 Days and 11.1 Hours
Inflammatory bowel disease (IBD) is an immunological disorder that is usually treated with immunosuppressive therapy, potentially leading to increases in vulnerability to infections. Although many infections can be prevented by vaccination, vaccination coverage in these patients in clinical practice is insufficient. Therefore, the seroprotection condition should be verified, even for routine vaccines, such as hepatitis B or pneumococcus. Response to vaccines in IBD patients is thought to be impaired due to the immunological alterations generated by the disease and to the immunomodulatory treatments. The immunogenicity of hepatitis B, influenza, and pneumococcal vaccines is impaired in IBD patients, whereas the response to papillomavirus vaccine seems similar to that observed in the healthy population. On the other hand, data on the immunogenicity of tetanus vaccine in IBD patients are conflicting. Studies assessing the response to measles-mumps-rubella, varicella, and herpes zoster vaccines in IBD patients are scarce. The cellular and molecular mechanisms responsible for the impairment of the response to vaccination in IBD patients are poorly understood. Studies aiming to assess the response to vaccines in IBD patients and to identify the mechanisms involved in their immunogenicity are warranted. A better understanding of the immune response, specifically to vaccines, in patients with immune-mediated diseases (such as IBD), is crucial when developing vaccines that trigger more potent immunologic responses.
Core tip: Inflammatory bowel disease (IBD) patients are vulnerable to infections owing to the underlying immunological disorder and to the immunosuppressive therapy used to treat the disease. Although some of these infections could be vaccine-preventable, IBD patients show impaired immunogenicity to some vaccines (such as hepatitis B or pneumococcal vaccines). In this review, the authors discuss available data on the immunogenicity of vaccines in IBD patients and summarize current knowledge on the mechanisms that could impair responses to vaccines.