Induction of mucosal healing by intensive granulocyte/monocyte adsorptive apheresis (GMA) without use of corticosteroids in patients with ulcerative colitis: long-term remission maintenance after induction by GMA and efficacy of GMA re-treatment upon relapse

Higher Processed Blood Volume of Granulocyte and Monocyte Adsorption Apheresis Ameliorates Long-Term Disease Activity in Ulcerative Colitis Patients

Background

Granulocyte and monocyte adsorption apheresis (GMA) is a therapeutic option for remission induction in the active ulcerative colitis (UC) patients. Effects of high processed blood volume of GMA as remission induction therapy on the long-term prognosis of UC patients have remained unclear. For this study, we investigated the relation between re-exacerbation of UC and the processed blood volume of GMA performed as induction therapy.

Methods

Data from UC patients treated using a total of 10 GMA sessions as remission induction therapy during 2012 - 2022 were retrospectively collected and analyzed. The relation between the GMA dose, processed blood volume of GMA divided by body weight, and UC re-exacerbation requiring inpatient treatment within 1 year was evaluated.

Results

This study examined data of 72 active UC patients, with median age of 44.4 years (65% male) and median GMA dose of 34.2 mL/kg/session. Kaplan-Meier analysis showed the 1-year exacerbation-free rate was significantly higher in the higher GMA dose group than in the lower GMA dose group (P = 0.008). Cox proportional hazards regression analyses revealed a higher GMA dose as inversely associated with the re-exacerbation of UC within 1 year (hazard ratio: 0.36, 95% confidence interval: 0.17 - 0.78). Extended treatment time of GMA session beyond 60 min contributed to achieving the higher GMA dose and did not increase unexpected treatment termination because of clotting.

Conclusion

Greater processed blood volume of GMA per patient body weight may be associated with a lower 1-year exacerbation rate in UC patients.

Adsorptive cytapheresis in ulcerative colitis: A non-pharmacological therapeutic approach revisited

Adsorptive cytapheresis proves effective in a proportion of patients affected by ulcerative colitis. Relatively high cost and the need for apheresis facilities, prevented the widespread use of this therapeutic approach. More so following the introduction of anti-TNFα biosimilars which proved both effective and inexpensive. Anti-TNFα agents, however, are burdened by high rate of primary and secondary non-response and prompt switching to new, high-cost biologics, and small molecules. The present review analyzes advantages and disadvantages of adsorptive cytapheresis in the present clinical scenario and suggests its repositioning in the therapeutic workup of selected subgroups of ulcerative colitis patients. The extremely favorable safety profile makes adsorptive cytapheresis a viable therapeutic option in elderly and high-risk UC patients, as well as potential second-line treatment in corticosteroid-dependent patients and poor responders to first-line biologics.

Targeting neutrophils in inflammatory bowel disease: revisiting the role of adsorptive granulocyte and monocyte apheresis

INTRODUCTION

Inflammatory bowel disease (IBD) is a chronic immune-mediated disease of the gastrointestinal tract comprising Crohn's disease (CD) and ulcerative colitis (UC). While any part of the digestive tract can be affected in CD, mucosal inflammation in UC is limited to the colon. Differences and similarities between the two conditions are reflected by their pathophysiology.

AREAS COVERED

An overview of immunological aspects, pharmacological management, and biomarkers of IBD is provided. The role of adsorptive granulocyte and monocyte apheresis (GMA) is reviewed including its primary and secondary effects on the immune system, as well as clinical studies in IBD (mainly UC), and potential biomarkers for adsorptive GMA.

EXPERT OPINION

In UC, adsorptive GMA with Adacolumn (Adacolumn®, JIMRO Co., Ltd. Takasaki, Gunma, Japan) selectively depletes elevated myeloid lineage leukocytes and has a range of beneficial secondary immune effects. Adsorptive GMA is a safe and effective non-pharmacological treatment option for UC. Pilot studies have reported promising results for adsorptive GMA in combination with biological agents, although larger studies are required. Fecal calprotectin concentrations, neutrophil counts in histological samples and/or the neutrophil/lymphocyte ratio in peripheral blood may prove to be useful biomarkers for predicting GMA effectiveness in the future.