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OBJECTIVE: Transmural healing (TH) is emerging as a potential Crohn´s Disease (CD) treatment target. Early biological treatment seems to be associated with improved disease outcomes, but its impact on TH remains unclear. We aimed to assess the impact of early biological treatment initiation on TH and its influence on CD prognosis.
METHODS: This multicenter retrospective study included adult CD patients starting biological therapy. TH was assessed using magnetic resonance enterography (MRE) at 12±6 months post-therapy initiation, with radiological examinations reviewed by blinded expert radiologists. TH was defined as complete normalization of all MRE parameters. Timing of biological therapy initiation was analyzed as a continuous variable, with optimal cut-off determined using the Youden index and clinical relevance. Logistic regression with propensity score-adjusted analysis was used to assess the association between early biological therapy initiation and TH. Long-term outcomes (bowel damage progression, CD-related surgery, CD-flare hospitalization, and therapy escalation) were evaluated.
RESULTS: Among 154 CD patients, early biological therapy initiation within 12 months of diagnosis was associated with significantly higher TH rates (aOR 3.23, 95% CI 1.36-7.70, p<0.01), which persisted after adjusting for previous biological therapy use (aOR 2.82, 95% CI 1.13-7.06, p=0.03). Time-to-event analysis demonstrated that TH was significantly associated with reduced time until bowel damage progression (aHR 0.28, 95% CI 0.10-0.79, p=0.02), CD-related surgery (aHR 0.21, 95% CI 0.05-0.88, p=0.03) and therapy escalation (aHR 0.35, 95%CI 0.14-0.88, p=0.02), independently of early biological therapy.
CONCLUSIONS: Early initiation of biological therapy within 12 months of diagnosis significantly increases TH rates, leading to improved long-term outcomes in CD patients.

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The ability of 18F-FDG positron emission tomography (PET) to track disease activity and treatment response in patients with Ankylosing Spondylitis (AS) or Psoriatic Arthritis (PsA) remains unclear. Here, we assessed whether 18F-FDG uptake is a marker of disease activity and treatment response in AS or PsA, and explored the ability of 18F-FDG to predict treatment response. Patients with AS (n = 16) or PsA (n = 8) who were scheduled to initiate treatment with biologics were recruited. Participants underwent a clinical evaluation and an 18F-FDG scan prior to therapy initiation. Eleven participants underwent a follow-up 18F-FDG scan 3 months post-treatment. Images were quantified using a composite measure that describes the inflammatory status of the patient. Clinically involved joints/entheses had higher 18F-FDG uptake compared to unaffected areas (median difference > 0.6, p < 0.01). Among patients with AS, pre-treatment 18F-FDG uptake was strongly associated with disease activity (r = 0.65, p = 0.006). Longitudinal 18F-FDG scans demonstrated that decreases in uptake at 3 months were associated to clinical response (βΔgSUVmax > 8.5, p < 0.001). We found no significant association between pre-treatment 18F-FDG uptake and subsequent clinical response. 18F-FDG PET shows potential as a marker of disease activity in AS and PsA, allowing for monitorization of biological treatment efficacy in these patients.

BACKGROUND: The relationship between biologic treatments for psoriasis (PsO) and development of inflammatory arthritis in patients is not fully understood.
OBJECTIVE: Analyze the effects of biologic treatment on development of inflammatory arthritis in PsO patients.
METHODS: This retrospective study assessed PsO patients identified in the Optum Clinformatics® Data Mart database from Jan 2007 to Mar 2023 with no baseline diagnosis of inflammatory arthritis. Patients were stratified based on the class of initial biologic treatment (IL-23, IL-12/23, IL-17, or TNF inhibitor) and followed for up to 3 years or development of inflammatory arthritis. Risk of developing inflammatory arthritis was assessed using a multivariate Cox proportional hazard models using IL-23 inhibitors as reference.
RESULTS: Incidence rates of developing inflammatory arthritis expressed as events/100 person-years were 4.99, 7.29, 6.06, and 9.39 for IL-23, IL-17, IL-12/23, and TNF inhibitors respectively. Adjusted hazard ratios were significantly higher for patients receiving IL-17 (1.44; p=.0294) and TNF (1.90; p<.0001) inhibitors when compared to patients receiving IL-23 inhibitors.
CONCLUSIONS: Limitations include those associated with medical coding errors and the potential for protopathic bias.
CONCLUSIONS: Patients receiving IL-23 inhibitors are at lower risk for developing inflammatory arthritis or PsA compared to those receiving IL-17 and TNF inhibitors.

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We report one of the first cases of eosinophilic gastritis (EoG) in a child under 12 years treated with benralizumab. At 7 years, our patient was started on benralizumab after failing to respond to various combinations of high-dose omeprazole, milk elimination diet, oral viscous budesonide, and oral systemic steroids. He had a complete depletion of gastrointestinal tissue eosinophils with improved symptoms but had symptomatic flares with tapering of background therapy. However, after 4 years on benralizumab he became symptomatic again. Benralizumab may be a viable option for EoG refractory to systemic steroids but only as a short-term adjunct therapy. More robust studies with long-term data are needed, especially in this younger population.

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