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Siponimod: A Review in Secondary Progressive Multiple Sclerosis.

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Oral siponimod effectively treats secondary progressive multiple sclerosis (SPMS) by reducing disability progression and disease activity. Long-term studies show sustained benefits and a well-tolerated safety profile, making it a valuable option for active SPMS patients.

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Area of Science:

  • Neurology
  • Immunology
  • Pharmacology

Background:

  • Secondary progressive multiple sclerosis (SPMS) is a debilitating neurological condition with limited treatment options.
  • Sphingosine 1-phosphate receptor (S1PR) modulators represent a class of therapies targeting immune cell trafficking.

Purpose of the Study:

  • To evaluate the efficacy and safety of oral siponimod in patients with SPMS.
  • To assess the long-term effects of siponimod treatment in an open-label extension study.

Main Methods:

  • The pivotal EXPAND trial involved a broad spectrum of SPMS patients treated with once-daily oral siponimod 2 mg.
  • Efficacy was measured by clinical and MRI-defined outcomes, including 3-month confirmed disability progression on the Expanded Disability Status Scale (EDSS).
  • Safety was monitored throughout the double-blind core phase and the open-label extension phase (up to 5 years).

Main Results:

  • Siponimod significantly reduced clinical and MRI-defined outcomes of disease activity and disability progression compared to placebo.
  • Beneficial effects were sustained during long-term treatment in the open-label extension phase.
  • The safety profile was generally well-tolerated, consistent with other S1PR modulators, with no new safety signals identified.

Conclusions:

  • Oral siponimod is an effective treatment for active SPMS, demonstrating sustained efficacy and a favorable safety profile.
  • Siponimod offers a convenient oral dosage regimen and represents an important therapeutic option for adult patients with SPMS.
  • Further real-world data will help define the long-term role of siponimod in SPMS management.