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Fingolimod-induced decrease in heart rate may predict subsequent decreasing degree of lymphocytes.

Tokunori Ikeda1,2, Tatsuyuki Kakuma3, Mari Watari4

  • 1Department of Neurology, Graduate School of Medical Sciences, Kumamoto University, Kumamoto, Japan. ryousei@kumamoto-u.ac.jp.

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This summary is machine-generated.

Fingolimod treatment in multiple sclerosis patients shows a correlation between heart rate changes and lymphocyte reduction. Higher heart rate variability may predict greater lymphocyte decrease, offering insights into treatment response.

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Area of Science:

  • Neurology
  • Pharmacology
  • Immunology

Background:

  • Relapse-remitting multiple sclerosis (RRMS) is an autoimmune disease affecting the central nervous system.
  • Fingolimod is a disease-modifying therapy used to treat RRMS.
  • Understanding treatment effects and potential predictive markers is crucial for managing MS.

Purpose of the Study:

  • To investigate the correlation between heart rate (HR) changes and lymphocyte count reduction in RRMS patients treated with fingolimod.
  • To determine if HR patterns can predict the degree of lymphopenia induced by fingolimod.

Main Methods:

  • 30 RRMS patients received 0.5 mg fingolimod, with HR monitored for 24 hours.
  • HR time trends were analyzed using a mixed-effect model with three cosine curves.
  • Spearman's correlation and regression analyses assessed the relationship between HR parameters and lymphocyte counts.

Main Results:

  • A significant positive correlation was found between the amplitude of the second HR curve and the change in lymphocyte count (p=0.006).
  • Regression analysis confirmed the significance of this relationship (p=0.002).
  • Patients with higher HR amplitude (high influence group) showed a significantly greater decrease in lymphocytes post-treatment compared to the low amplitude group (p<0.001).

Conclusions:

  • Heart rate dynamics during fingolimod treatment may serve as a predictive marker for the extent of lymphocyte reduction.
  • Monitoring HR patterns could offer a non-invasive method to anticipate fingolimod's effect on lymphocyte counts in RRMS.
  • This finding may help personalize MS treatment strategies by predicting therapeutic response and side effects.