Bariatric surgery and dimethyl fumarate-induced lymphopenia in patients with multiple sclerosis

Neurol Sci. 2024 Jun;45(6):2807-2810. doi: 10.1007/s10072-023-07283-w. Epub 2023 Dec 27.

Abstract

Introduction: Lymphopenia is a known side effect of dimethyl fumarate (DMF), a disease-modifying therapy (DMT) for patients with multiple sclerosis (pwMS). A body mass index ≥ 30 kg/m2 has been identified as a protective factor; however, no data are available on lymphopenia in pwMS undergoing to weight loss due to bariatric surgery.

Methods: We described two pwMS with history of bariatric surgery who started DMF as DMT.

Results: The two pwMS experienced persistent lymphopenia during DMF-treatment, which was resolved after its discontinuation.

Conclusions: Several mechanisms might modify DMF pharmacokinetic profiles after bariatric surgery and its bioavailability. Absolute lymphocyte count should be monitored in pwMS treated with DMF and history of bariatric surgery and weight loss.

Keywords: Bariatric surgery; Dimethyl fumarate; Lymphopenia; Risk factors.

Publication types

  • Case Reports

MeSH terms

  • Bariatric Surgery* / adverse effects
  • Dimethyl Fumarate* / adverse effects
  • Humans
  • Immunosuppressive Agents* / adverse effects
  • Lymphopenia* / chemically induced
  • Multiple Sclerosis / drug therapy
  • Multiple Sclerosis, Relapsing-Remitting / drug therapy

Substances

  • Dimethyl Fumarate
  • Immunosuppressive Agents