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Bronchial hyper-responsiveness after human cardiopulmonary transplantation
A R Glanville1, C M Burke, J Theodore
1Department of Medicine, Stanford University School of Medicine, California 94305.
Clinical Science (London, England : 1979)
|September 1, 1987
Summary
Heart-lung transplant recipients show significantly increased bronchial hyper-responsiveness to methacholine compared to healthy individuals. This indicates heightened airway reactivity in transplanted lungs post-procedure.
Area of Science:
- Pulmonology
- Immunology
- Transplant Medicine
Background:
- Airway hyper-responsiveness is a key feature of asthma and other obstructive lung diseases.
- Understanding airway function post-transplantation is crucial for long-term graft survival and patient outcomes.
Purpose of the Study:
- To investigate bronchial responsiveness to methacholine in heart-lung transplant (HLT) recipients.
- To compare airway reactivity in HLT recipients with that of normal subjects.
Main Methods:
- Ten HLT recipients and ten normal subjects underwent methacholine challenge testing.
- Bronchial responsiveness was assessed by measuring the provocation dose of methacholine causing a 20% fall in FEV1 (PD20 FEV1) and a 50% fall in specific airway conductance (PD50 sGAW).
Main Results:
- HLT recipients demonstrated significantly lower mean PD20 FEV1 (1.70 mg vs 11.55 mg; P < 0.001).
- Mean PD50 sGAW was also significantly lower in HLT recipients (0.08 mg vs 5.13 mg; P < 0.005).
- These findings indicate heightened airway reactivity in the transplanted lungs.
Conclusions:
- Transplanted lungs in HLT recipients exhibit significant bronchial hyper-responsiveness to inhaled cholinergic agonists.
- This heightened reactivity may have implications for respiratory health and management strategies in post-HLT patients.