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<bold><italic>Background/Aims:</italic></bold> Adalimumab dose escalation is one of the most important options in refractory Crohn’s disease patients with loss of response to adalimumab. The goal of this study was to evaluate the effectiveness of adalimumab dose escalation in Crohn’s disease patients with loss of response to adalimumab, since there are few reports of adalimumab dose escalation, especially in East Asia. <bold><italic>Methods:</italic></bold> The clinical response to adalimumab dose escalation in Crohn’s disease patients with loss of response to adalimumab was evaluated retrospectively, using the Crohn’s disease activity index score, serum C-reactive protein levels, and endoscopic analyses. <bold><italic>Results:</italic></bold> Of the 203 Crohn’s disease patients treated with anti-tumor necrosis factor, 14 refractory Crohn’s disease patients with loss of response to adalimumab received adalimumab dose-escalation therapy. The C-reactive protein level was significantly reduced from the start to weeks 12 and 52 of adalimumab dose escalation in the whole group, although there were no significant reductions of Crohn’s disease activity index scores. Both Crohn’s disease activity index scores and C-reactive protein levels were significantly reduced from the start to weeks 12 and 52 of adalimumab dose escalation in patients without previous infliximab treatment, although C-reactive protein levels were positive in all cases with previous infliximab exposure at weeks 12 and 52. Endoscopic mucosal healing was achieved with adalimumab dose escalation in 2 cases without previous infliximab treatment. <bold><italic>Conclusions:</italic></bold> Adalimumab dose-escalation therapy is effective in refractory Crohn’s disease patients with loss of response to adalimumab, especially in cases without previous infliximab treatment.

case reports in gastroenterology

Adalimumab Dose-Escalation Therapy Is Effective in Refractory Crohn’s Disease Patients with Loss of Response to Adalimumab, Especially in Cases without Previous Infliximab Treatment