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Laboratory Changes During Dupilumab Treatment for Atopic Dermatitis.

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  • 1Dermatology, University Hospital, Coimbra Local Health Unit, Coimbra, Portugal.

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Summary

Dupilumab effectively treats atopic dermatitis (AD), causing a temporary, mild increase in eosinophils that is not clinically significant and does not warrant stopping treatment. This finding supports continued dupilumab use in AD patients.

Keywords:
Atopic dermatitisDermatitis atópicaDupilumabEosinophilsEosinófilosIgELDH

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Area of Science:

  • Immunology
  • Dermatology
  • Pharmacology

Background:

  • Dupilumab, an IL-4/IL-13 inhibitor, is approved for moderate-to-severe atopic dermatitis (AD).
  • Previous studies noted increased serum eosinophils during dupilumab treatment, but their clinical significance remains unclear.

Purpose of the Study:

  • To evaluate changes in blood eosinophil counts in patients with moderate-to-severe AD treated with dupilumab.
  • To assess other laboratory parameters and their correlation with dupilumab treatment.

Main Methods:

  • A multicenter, prospective, observational study involving 81 adolescent and adult patients with moderate-to-severe AD.
  • Data collected included clinical AD severity scores, complete blood counts, serum IgE, and LDH levels at baseline and at weeks 8, 16, 24, and 48.

Main Results:

  • Patients showed sustained improvement in AD severity scales from week 8 onwards.
  • Eosinophil levels significantly increased at week 16 but returned to baseline by week 48.
  • Lactate dehydrogenase (LDH) and immunoglobulin E (IgE) levels decreased during the study.

Conclusions:

  • Dupilumab treatment leads to significant clinical improvement in AD.
  • The observed mild, self-limited increase in eosinophils at week 16 is not clinically relevant and does not present with adverse signs.
  • Elevated eosinophil levels during dupilumab therapy should not necessitate treatment discontinuation.