Jean Frederic Colombel

The burden of IBD is rising globally. This session aims to understand the role of genetics in the development of IBD in diverse populations and define the pre-disease state in IBD. It will also explore the emerging field of multi-omics to clinically characterize IBD…

Aconitate decarboxylase 1 (ACOD1; also known as IRG-1) is the ubiquitous source of the metabolite itaconate, which dampens inflammasome activation by preventing HIF1α production of IL-1β and prevents TNF production through NRF2 activation…

The pathogenesis of inflammatory bowel disease (IBD) involves crosstalk between genetic and microbial factors that influence immune reactions. Tofacitinib, a pan JAK-STAT inhibitor, is a small molecule indicated for the treatment of moderate-to-severe ulcerative colitis (UC)…

The pathogenesis of inflammatory bowel disease (IBD) involves crosstalk between genetic and microbial factors that influence immune reactions. Tofacitinib, a pan JAK-STAT inhibitor, is a small molecule indicated for the treatment of moderate-to-severe ulcerative colitis (UC)…

BACKGROUND: After successful induction, a subset of patients with Crohn’s disease (CD) experience a secondary loss of response (LoR) to ustekinumab (UST) maintenance therapy. Dose intensification may assist in regaining response…

BACKGROUND AND AIMS: A treat-to-target (TTT) strategy of striving for symptomatic and endoscopic remission is recommended for the management of inflammatory bowel diseases (IBD). Yet, real-world uptake of TTT strategies has been modest…

BACKGROUND AND AIMS: A treat-to-target (TTT) strategy of striving for symptomatic and endoscopic remission is recommended for the management of inflammatory bowel diseases (IBD). Yet, real-world uptake of TTT strategies has been modest…

BACKGROUND: Anti-granulocyte macrophage-colony stimulating factor autoantibodies (anti-GM-CSF) have been associated with development of Crohn’s disease (CD) and complications at time of diagnosis. There are limited data on anti-GM-CSF as a prognostic biomarker in CD…

BACKGROUND: Prevention of postoperative recurrence (POR) in Crohn’s disease (CD) after ileo-colonic (IC) resection is still a highly debated topic. Prophylactic immunosuppression after surgery is currently recommended in presence of at least one clinical risk factor (RF)…

BACKGROUND: Complex perianal fistulas are a serious complication in patients with Crohn’s disease (CD)…

Crohn’s disease (CD) is characterized by an aberrant microbiome composition – including a depletion of gut bacteria that produce short chain fatty acids (SCFA) – and by presence of anti-commensal systemic IgG…

Vedolizumab (VDZ) is a monoclonal antibody that targets the gut-homing receptor α4β7. Despite its widespread use as a frontline therapy for ulcerative colitis (UC) and Crohn’s disease, its mode of action (MOA) remains unclear…

Autologous stem cell transplant (auto-SCT) is unparalleled in its ability to induce clinical and endoscopic remission for the treatment of refractory Crohn’s disease (CD)…

Anti-granulocyte/macrophage-colony stimulating factor autoantibody (GM-CSF AuAB) has been identified before the onset of Crohn’s Disease (CD) and is associated with an increase in complicated disease. However, its connection to the gut microbiome, a key factor in CD progression, remains unclear…

BACKGROUND: Crohn's disease (CD) can lead to progressive bowel damage and disability. Disability has been proposed by the SPIRIT-IOIBD consensus as an endpoint in disease-modification trials. Despite this, there is scarce data on disability at CD diagnosis…

BACKGROUND: Disease clearance in ulcerative colitis (UC) is defined as concurrent achievement of clinical, endoscopic, and histologic remission…

Approximately 20-30% of individuals with Crohn's disease (CD) experience a relatively mild disease course without progression. However, there is no widely accepted objective definition of mild CD. We aimed to identify endoscopic severity cut-offs that can be used to define mild non-progressive CD…

Approximately 20% of patients with Crohn’s disease (CD) have perianal fistulizing CD, which are most often complex perianal fistula (PAF). Studies have shown that 4-5% of patients with CD present with PAF without luminal disease, termed isolated perianal CD (iPCD)…

Specific pollutants and environmental exposures are implicated in modulating inflammatory bowel disease (IBD) risk. Crohn’s disease (CD) clustering has been reported in agricultural areas…

Granulocyte Macrophage-Colony Stimulating Factor (GM-CSF) maintains mononuclear phagocytes (MNP) and supports intestinal immune homeostasis. Anti-GM-CSF autoantibodies (aGMAbs) are found in approx. 25% of all Crohn’s disease (CD) patients…