Altered STAT4 Isoform Expression in Patients with Inflammatory Bowel Disease

Rukhsana Jabeen, Lucy Miller, Weiguo Yao, Sandeep Gupta, Steven Steiner, Mark Kaplan

Research output: Contribution to journalArticle

7 Citations (Scopus)

Abstract

Background: Crohn's disease (CD) and ulcerative colitis (UC) are the major forms of inflammatory bowel disease, and pathogenesis involves a complex interplay among genetic, environmental, and immunological factors. We evaluated isoform expression of the IL-12-activated transcription factor STAT4 in children with CD and UC. Methods: We collected biopsy samples from both patients newly diagnosed with CD and with UC. We further collected blood samples from patients newly diagnosed with CD and with UC as well as from patients who had a flare-up after being in clinical remission, and we examined the ratios of STAT4β/STAT4α mRNA. In addition to STAT4 isoforms, we measured the expression of the cytokines TNFα, IFNγ, granulocyte macrophage-colony stimulating factor, and IL-17 using polymerase chain reaction of biopsy samples and multiplex analysis of patient serum samples. Results: Ratios of STAT4β/STAT4α were increased in specific gastrointestinal tract segments in both patients with CD and those with UC that correlate with the location and severity of inflammation. In contrast, we did not observe changes in STAT4β/STAT4α ratios in biopsy specimens from patients with eosinophilic esophagitis. We also observed increased STAT4β/STAT4α ratios in the peripheral blood mononuclear cells of patients with UC and those with CD, compared with healthy controls. Ratios were normalized after patients were treated with steroids. Conclusions: Collectively, these data indicate that STAT4 isoforms could be an important noninvasive biomarker in the diagnosis and treatment of inflammatory bowel disease and that expression of these isoforms might provide further insight into the pathogenesis of IBD.

Original languageEnglish
Pages (from-to)2383-2392
Number of pages10
JournalInflammatory Bowel Diseases
Volume21
Issue number10
DOIs
StatePublished - Jul 20 2015

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Inflammatory Bowel Diseases
Protein Isoforms
Ulcerative Colitis
Crohn Disease
Biopsy
STAT4 Transcription Factor
Eosinophilic Esophagitis
Interleukin-17
Immunologic Factors
Interleukin-12
Granulocyte-Macrophage Colony-Stimulating Factor
Gastrointestinal Tract
Blood Cells
Biomarkers
Steroids
Cytokines
Inflammation
Polymerase Chain Reaction
Messenger RNA
Serum

Keywords

  • biomarker
  • IBD
  • STAT4 isoforms

ASJC Scopus subject areas

  • Gastroenterology
  • Immunology and Allergy

Cite this

Altered STAT4 Isoform Expression in Patients with Inflammatory Bowel Disease. / Jabeen, Rukhsana; Miller, Lucy; Yao, Weiguo; Gupta, Sandeep; Steiner, Steven; Kaplan, Mark.

In: Inflammatory Bowel Diseases, Vol. 21, No. 10, 20.07.2015, p. 2383-2392.

Research output: Contribution to journalArticle

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