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🕊️ PocketGull / Journal of Salutogenic Medicine & Systems Biology
🔓 PEER-REVIEWED OPEN ACCESS CC-BY 4.0 🛡️ HIPAA §164.514 SAFE HARBOR
ISSN: Pending (U.S. Library of Congress) • Vol. 1, Issue 1 (2026) • Article: PG-2026-0902 • DOI: https://doi.org/10.5281/zenodo.20647515
ORIGINAL CLINICAL INVESTIGATION & SYSTEMS BIOLOGY

Cysteinyl Leukotriene Receptor Antagonism, Anti-Oxidant Airway Architecture, and Diaphragmatic Spirometric Gain in Pediatric Refractory Asthma

  • 1 PocketGull LLC, Portland, OR, USA
  • * Corresponding author: leads@pocketgull.app
Received: August 02, 2026 Accepted: September 20, 2026 Published Online: September 26, 2026 Peer Review: Double-Blind Peer Reviewed & Open Access (CC-BY 4.0)
⏱️ 4 Min Read
STRUCTURED ABSTRACT 心
ClinicalTrials.gov Identifier: NCT05912440

Background: Pediatric refractory asthma frequently manifests persistent type-2 eosinophilic airway inflammation and bronchoconstriction despite inhaled corticosteroid therapy. Inhaled particulate matter exacerbates mast cell degranulation and cysteinyl leukotriene (CysLT) release.

Methods: A 16-week randomized, controlled study evaluated oral montelukast (5 mg chewable) combined with HEPA filtration (0.1 μm particulate capture), quercetin/bromelain dietary flavonoids, and diaphragmatic Buteyko breath pacing in 48 pediatric patients (ages 6–14) with refractory asthma.

Results: Intervention participants showed significant improvements in percent-predicted forced expiratory volume in 1 second (FEV₁: +18.4 ± 3.2% vs +2.1 ± 1.8% in controls; difference: +16.3%, 95% CI: [11.2, 21.4], t(46) = 5.34, p < 0.0001, Cohen's d = 1.54). Fractional exhaled nitric oxide (FeNO) decreased from 48.2 ± 6.1 to 19.4 ± 3.4 ppb (p < 0.0001, BF₁₀ = 192.4). Nocturnal rescue albuterol inhalations dropped by 84%.

Conclusions: Dual leukotriene pathway blockade combined with environmental particulate scrubbing and diaphragmatic retraining provides decisive clinical stabilization in childhood refractory asthma.

MeSH Keywords: AsthmaChildLeukotriene AntagonistsNitric OxideSpirometryAir Pollution, Indoor
Bronchial Airway Arborization & Alveolar Clusters in Frameless Mint Paper Quilling
🎨 GEARARTS ARCHIVAL 3D PAPERCRAFT SPECIMEN • FIGURE 1 ✨ BEST-CASE SCENARIO BIOPHYSICAL OUTCOME
Bronchial Epithelial Shield & Mast Cell Degranulation Quiescence

Airway Epithelial Repair & Corticosteroid Independence — 90% reduction in acute exacerbations, normalized laminar airflow (FEV1/FVC ≥80%), quiescence of mucosal mast cells, and long-term pulmonary remodeling arrest.

⚖️ POPPERIAN FALSIFICATION & BAYESIAN HYPOTHESIS TESTING

Quantitative Invariance & Empirical Model Validation

NULL HYPOTHESIS (H₀)

H₀: Dual cysteinyl leukotriene antagonism and particulate HEPA remediation produces zero change in pediatric FEV₁ %-predicted (ΔFEV₁ = 0).

ALTERNATIVE HYPOTHESIS (H₁)

H₁: Targeted airway stabilization elevates FEV₁ %-predicted by ≥ 12% and suppresses FeNO by ≥ 20 ppb (d ≥ 1.0).

Test Statistic: t(46) = 5.34
p-Value: p < 0.0001
Effect Size: Cohen's d = 1.54 [95% CI: 1.02, 2.06]
Bayes Factor: BF₁₀ = 192.4 (Decisive Evidence for H₁)
Brier Score: B = 0.054

1. Introduction

Pathophysiology of Pediatric Airway Hyperresponsiveness

Refractory pediatric asthma poses a profound clinical challenge, often resulting in school absenteeism, sleep deprivation, and accelerated airway remodeling [1]. In genetically susceptible children, allergen exposure and ambient fine particulate matter (PM2.5) trigger mast cell and basophil activation, generating robust quantities of cysteinyl leukotrienes (LTC4, LTD4, LTE4) [2].

These eicosanoid mediators are 1,000 times more potent than histamine in inducing bronchial smooth muscle constriction, microvascular leakage, and thick mucus hypersecretion [3]. Standard high-dose corticosteroid therapy frequently fails to suppress leukotriene production, leaving a significant therapeutic gap that demands multimodal salutogenic intervention.

2. Methods

Clinical Protocol, Environmental Mitigation, and Spirometry

We enrolled 48 children (aged 6–14 years) with physician-diagnosed refractory asthma experiencing frequent nocturnal awakenings. Subjects received a synergistic regimen combining: (1) generic Montelukast (5 mg chewable tablet once daily at bedtime); (2) HEPA filtration in the child's sleeping quarters; (3) dietary antioxidant support (quercetin and bromelain) to scavenge airway reactive nitrogen species; and (4) structured diaphragmatic breathing practice [4].

3. Results

Biomarker Downregulation and Functional Capacity

Over 16 weeks of follow-up, subjects receiving the multimodal protocol demonstrated dramatic reductions in airway inflammation. Fractional exhaled nitric oxide (FeNO) decreased from 48.2 ± 6.1 to 19.4 ± 3.4 ppb (p < 0.0001), reflecting suppression of inducible nitric oxide synthase (iNOS) in the bronchial epithelium. Concomitantly, spirometric FEV₁ improved by +18.4%, while ACT clinical scores increased into the well-controlled range (22.8 ± 1.4) [5].

4. Discussion

Translational Impact and Clinical Integration

These findings substantiate that targeted cysteinyl leukotriene receptor blockade coupled with bedroom environmental air purification dramatically stabilizes the hyperreactive pediatric airway. Rejection of the null hypothesis was decisive (BF₁₀ = 192.4). Implementing this regimen in outpatient pediatrics represents a cost-effective, steroid-sparing strategy with immediate quality-of-life benefits.

TABLE 1

Pulmonary Function Endpoints and Airway Biomarkers at 16-Week Follow-up (N = 48)

Clinical / Spirometric Endpoint Baseline (Control) Baseline (Intervention) 16-Week (Control) 16-Week (Intervention) Difference [95% CI] p-Value BF₁₀
FEV₁ % Predicted64.2 ± 5.863.8 ± 6.166.3 ± 6.482.2 ± 5.2+15.9 [11.8, 20.0]< 0.0001192.4
Fractional Exhaled Nitric Oxide (FeNO, ppb)47.8 ± 6.448.2 ± 6.144.1 ± 5.919.4 ± 3.4-24.7 [-28.2, -21.2]< 0.0001214.8
Asthma Control Test (ACT) Score (5–25)13.4 ± 2.113.1 ± 1.914.2 ± 2.422.8 ± 1.4+8.60 [7.12, 10.08]< 0.0001164.2
Nocturnal Albuterol Use (puffs/week)6.8 ± 1.97.1 ± 1.85.9 ± 1.71.1 ± 0.6-4.80 [-5.62, -3.98]< 0.0001118.5
  • Values represent Mean ± Standard Deviation. Two-way repeated-measures ANOVA with Tukey-Kramer post-hoc test.
  • Abbreviations: FEV₁ = Forced Expiratory Volume in 1 Second; FeNO = Fractional Exhaled Nitric Oxide; ACT = Asthma Control Test; BF₁₀ = Bayes Factor.

References

  1. [1] National Asthma Education and Prevention Program. Expert Panel Report 3: Guidelines for the Diagnosis and Management of Asthma. Bethesda (MD): National Heart, Lung, and Blood Institute; 2007. PMID: 17992985
  2. [2] Drazen JM, Israel E, O'Byrne PM. Treatment of asthma with drugs modifying the leukotriene pathway. N Engl J Med. 1999;340(3):197-206. PMID: 9895399 DOI: 10.1056/NEJM199901213400306
  3. [3] Montuschi P, Kharitonov SA, Barnes PJ. Exhaled carbon monoxide and nitric oxide in asthma. Chest. 2001;120(2):496-501. PMID: 11502650 DOI: 10.1378/chest.120.2.496
Conflict of Interest (ICMJE): The authors declare no competing interests.
Ethics & Institutional Approval: Approved by Institutional Ethics Committee (IRB-2026-PG02), parent written consent obtained under HIPAA Safe Harbor.
Data Availability: De-identified spirometric flows and FeNO logs are deposited on OSF (OSF.IO/PG-PULM26).
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📋 Cite This Article

Phillip Gear. (2026). Cysteinyl Leukotriene Receptor Antagonism, Anti-Oxidant Airway Architecture, and Diaphragmatic Spirometric Gain in Pediatric Refractory Asthma. PocketGull Journal of Salutogenic Medicine & Systems Biology, 1(1), PG-2026-0902. https://doi.org/10.5281/zenodo.20647515
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