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High level of IgG4 as a biomarker for a new subset of inflammatory bowel disease.

ABSTRACT: The roles of B and plasma cells in the pathogenesis of inflammatory bowel disease (IBD) are largely unrevealed. Data on the characteristics of IgG4 in patients with IBD are scarce. In this case-control study, serum IgG4 levels were comparable between patients with IBD and healthy individuals, whereas patients with IBD had dramatically higher mucosal IgG4 counts than healthy individuals. In patients with UC, mucosal IgG4 counts were positively correlated with serum IgG4 levels, serum IgG4/IgG ratios, and the Mayo Index; serum IgG4 levels and IgG4/IgG ratios were associated with a history of intestinal surgery and medications. A significant mucosal IgG4 count was found in 33.3% of patients with IBD, whereas, elevated serum IgG4 levels were found in only 9.9% of patients with IBD. Lesions were more severe and extensive in IBD patients with high levels of serum and mucosal IgG4. High levels of serum and mucosal IgG4 decreased after treatment with glucocorticoids or other immunosuppressants. High IgG4 level may be a biomarker for a new subset of IBD. More studies are warranted to explore this new subset of IBD for personalized therapy in the future.

SUBMITTER: Wang Z

PROVIDER: S-EPMC6030091 | biostudies-literature |

REPOSITORIES: biostudies-literature

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Project description:IntroductionThere is a high degree of perceived stigma among adults with inflammatory bowel disease (IBD), with up to 84% considering a social stereotype against them due to their condition. This may negatively impact their treatment adherence and quality of life, as well as practical issues such as gaining urgent access to public bathroom facilities. It has been demonstrated that higher public knowledge levels can reduce public stigma, yet little is known about the general level of understanding of IBD in the community. A study was performed to ascertain the public knowledge levels of IBD in Christchurch, New Zealand, using a validated assessment tool.ObjectivesThe aims of this study were to implement a validated knowledge survey (IBD-KID2) among members of the general public in Christchurch, New Zealand, and to assess the level of understanding about IBD.MethodsRecruitment took place at a Health Research and Education showcase event at the University of Otago (Christchurch), which is a free event open to members of the public. All people over the age of 8 years were invited to participate. Demographic information was collected and the disease-specific knowledge assessment survey IBD-KID2 completed by all participants consenting to the research.ResultsOne hundred people consented to the study, and the mean age 39.9 was years (SD 20, range 12-82 years). Of these 100 participants, 71 were female and 71 had a post-secondary education. Twelve participants had a family history of IBD. The mean IBD-KID2 score was 8.7 (SD 2.9), equal to a percentage total score of 58%. No independent variable was found to be significantly associated with IBD-KID2 scores. The frequency of correct answers showed knowledge deficiencies in the areas of nutrition, treatment, growth, and the cause of IBD.ConclusionsThis study highlighted knowledge deficiencies among members of the general public in Christchurch, New Zealand. These topics may be addressed with awareness campaigns in order to maximise community support for adults and children with IBD.

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High level of IgG4 as a biomarker for a new subset of inflammatory bowel disease.

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