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Grand RoundsWeekly Evidence Brief

Allergy & Immunology

Edition

30-Second Takeaway

  • About one-third of severe T2-high asthma patients reached 12‑month remission on first biologic; lower baseline CRP predicted success.
  • All three approved CRSwNP biologics provided substantial real-world benefit, with highest 6‑month continuation on dupilumab.
  • Anti–IL‑5 monoclonal antibodies safely improved CRSwNP symptoms and reduced systemic steroid and surgery needs as second-line therapy.
  • Early upper-airway symptoms, otitis, and atopic heredity flagged young adults who later developed chronic rhinosinusitis.
  • Air pollution particles and high-fructose beverages appear to amplify pediatric atopy and allergic airway inflammation through epithelial and myeloid pathways.

Week ending April 18, 2026

Type 2 airway disease: biologic remission, upper-airway control, and early-life and environmental modifiers

One-third of severe T2-high asthma patients achieved 12‑month remission; low CRP independently predicted success

CLINICAL AND TRANSLATIONAL ALLERGYApr 16, 2026

In this retrospective single-center cohort, 206 severe T2-high asthma patients started their first biologic (omalizumab, mepolizumab, or benralizumab). At 12 months, 30% met strict clinical remission criteria: no exacerbations, no chronic oral steroids, and well-controlled symptoms on ACT and ACQ-6. Remission rates were similar across biologics, with numerically highest rates for benralizumab. Remitters had better baseline lung function, earlier disease onset, less smoking, and lower CRP, but only CRP remained predictive in multivariable analysis.

All three biologics improved severe CRSwNP in real life; dupilumab showed numerically highest continuation

RHINOLOGYApr 16, 2026

This Belgian prospective multicentre phase IV cohort followed 360 severe CRSwNP patients starting omalizumab, mepolizumab, or dupilumab. After 6 months, nasal polyp scores, smell, and patient-reported outcomes improved across all treatments, alongside better asthma control. Overall, 51% achieved a good-to-excellent multidomain response by EUFOREA criteria, and no severe adverse events occurred. Treatment continuation beyond 6 months was 74% for omalizumab, 81% for mepolizumab, and 92% for dupilumab, with numerically larger improvements on dupilumab.

First-trimester PM2.5 components increased offspring atopic dermatitis risk, partly via maternal low-grade inflammation

ECOTOXICOLOGY AND ENVIRONMENTAL SAFETYApr 14, 2026

Two prospective Chongqing birth cohorts contributed 4048 mother–child pairs with physician-diagnosed atopic dermatitis up to age 3. First-trimester exposure showed the strongest associations, with sulfate demonstrating the largest adjusted risk increase among PM2.5 components. Mixture modeling supported a positive association of combined components, with organic matter receiving the highest weight. Maternal neutrophil-to-lymphocyte ratio and systemic immune-inflammation index were associated with exposure, partially mediating risk and modifying effects on an additive scale.

References

Numbered in order of appearance. Click any reference to view details.

Additional Reads

Optional additional studies from this edition.

Edition context

Clinical signal

  • Baseline CRP may help stratify likelihood of clinical remission on anti-IgE or anti–IL‑5/IL‑5R therapy in severe T2-high asthma.
  • Real-world and trial data confirm biologics as effective systemic options for difficult CRSwNP, complementing surgery and topical therapy.
  • Mechanistic work highlights epithelial Ca2+ signaling and pollutant-licensed macrophages as upstream amplifiers of airway type 2 inflammation.