Eosinophilic Respiratory Problems: Allergic Bronchopulmonary Aspergillosis Paul A. Greenberger, M.D. 6 December 2011 Workshop 12

Objectives To review the differential diagnosis of pulmonary eosinophilia in patients with asthma To discuss classification of Allergic Bronchopulmonary Aspergillosis (ABPA) To consider treatment options for ABPA- corticosteroids, anti-fungals, and immunomodulators

Minimal Diagnostic Criteria for ABPA-Central Bronchiectasis (ABPA-CB) Asthma Central bronchiectasis Immediate cutaneous reactivity to Aspergillus species or A. fumigatus Elevated total serum IgE (>417 kU/L) Elevated serum IgE-A.fumigatus and or IgG- A.fumigatus compared to sera from prick positive patients with asthma

Populations at Risk of ABPA Asthma, mild intermittent to persistent severe asthma-about 1% of persistent asthma patients – diagnosed before age 20 but can be found in children and even geriatric patients. (Dx may be overlooked for decades) Cystic Fibrosis- from 1-14% in literature; ABPA may worsen the course of CF (air trapping, airway narrowing, unequal ventilation)

The Genus Aspergillus Has Over 180 Species There are 22 recognized recombinant Aspergillus allergens by the IUIS designated Asp f 1 to Asp f 29. Molecular weights kD. Four of the 22 include 2 from A. niger and 1 from A. oryzae and 1 from A. flavus. Approximately 40 components of A. fumigatus bind to IgE antibodies.

A. fumigatus- Characteristics Ubiquitous-outdoor recoveries even in winter Thermotolerant High numbers of spores occur after exposure to moldy hay, compost piles, potting soil, moldy wood chips, decaying vegetation, crawl spaces and basements, etc

Question: What fungi grow in bird droppings? ___________________

In The Indoor Environment, Aspergillus fumigatus Can Be Recovered In/From BedroomsYes No ? HallwaysYes No ? BathroomsYes No ? Water supplyYes No ?

Normal Defenses Against Inhaled A. fumigatus Spores Alveolar macrophages-ingest and kill spores PMNs-kill by an oxidative burst Pulmonary epithelium-as a barrier Alternative pathway of Complement-C3 and C5 Platelets

Presentation of ABPA Asymptomatic pulmonary infiltrate Pulmonary infiltrate(s) with eosinophilia Worsening asthma Peripheral blood eosinophilia Inspisated mucus difficult to remove during bronchoscopy.. Minimal cough or wheeze (or no asthma)

Complications of ABPA End Stage fibro-cavitary lung disease- Pseudomonas pneumonias, chronic sputum production, home O 2 Deaths, lung transplants Worsening of asthma from mild to prednisone dependent

Obejctive 1: Differential Diagnosis Asthma with middle lobe syndrome Severe asthma with fungal sensitization (SAFS) Asthma with community acquired pneumonia Chronic eosinophilic pneumonia Churg-Strauss Syndrome Mucoid impaction syndrome ABPMycosis Bronchocentric granulomatosis Hyper IgE Syndrome Chronic Granulomatous Disease Parasitism (Ascaris, Strongyloides etc) Cystic Fibrosis Idiopathic Bronchiectasis

Randomized Controlled Trial of Oral Antifungal Treatment for Severe Asthma with Fungal Sensitization The Fungal Asthma Sensitization Trial (FAST) Study AJRCCM 2009;179:11-18 Patients with SAFS do not fulfill criteria for ABPA Criteria for SAFS…. 1. severe (poorly controlled) asthma, 2. total IgE concentration < 1000 IU/mL (< 1000 kU/L) 3. skin test + or elevated in vitro IgE to ANY fungus

Objective 2. Classification of ABPA

Stages---- Radiographic Findings----Total IgE 1. AcuteUpper or middleSharply elevated 2. RemissionNo infiltrate and no pred > 6 mon Elevated or normal 3. ExacerbationUpper or middleSharply elevated 4. Corticosteroid dependent asthma Often without infiltrates, but can have PIE Elevated or normal 5. End StageFibrotic, bullous or cavitary Might be normal

Two Categories of ABPA ABPA-Central Bronchiectasis (ABPA-CB) with bronchiectasis present on inner 2/3 of CT field ABPA-Seropositive (ABPA-S)-which is a less aggressive form (Ann Allergy 1993;70: ) ABPA-S can convert to ABPA-CB

Classification of ABPA ABPA with central bronchiectasis …..ABPA-CB ABPA without bronchiectasis………….ABPA-S ABPA with “other radiologic findings”..ABPA-ORF ABPA is classified into 5 stages for ABPA-CB and 4 stages for ABPA-Seropositive Patients can change stages over time in either direction except if stage 5 (end stage- fibrocavitary)

Objective 3. Treatment Options Oral Corticosteroids Anti-fungals Immunomodulators TREAT the ASTHMA and CO-MORBIDITIES CONSIDER ENVIRONMENTAL SOURCES

Prednisone as Monotherapy 0.5mg/kg/each am for 2 weeks then on alterate mornings for 2 months….then Taper prednisone Repeat HRCT examination Repeat total IgE (should decline at least by 33%) Environmental exposures to molds-inquire re home and workplace for obvious sources

Antifungals Oral (itraconazole, voriconazole, posaconazole) Adverse effects of itraconazole…Gastrointestinal intolerance, LFTs, headache, peripheral neuropathy, sleep disturbance….and inhibition of CYP 3A4 dependent hepatic metabolism (increases concentration of prednisolone (not prednisone) and inhaled budesonide and fluticasone causing HPA suppression)

Itraconazole is a POTENT INHIBITOR of medications metabolized via CYP3A4 Potentiation of budesonide 400 ug/day in 2 weeks leading to adrenal suppression (J Cyst Fibrosis 2003;2: 73-5) Methylprednisolone Statins Cyclosporine

Anti-inflammatory effect of itraconazole in stable allergic bronchopulmonary aspergillosis: A randomized controlled trial JACI 2003;111:952-7 Itraconazole 400 mg daily for 16 weeks Primary outcome was induced sputum eos Secondary outcome measures: TEC, total IgE concentration, IgE-A fumigatus by CAP No pt had a change in LFTs Baseline FEV1 % = 55 (itraconazole) and 52 (placebo)

Outcomes Induced sputum eos: 3.8% decreased to 0.4% vs 3.0 to about 2% in controls Sputum ECP 4900 ng/ml decreased to 3000 in 4 weeks vs 3400 increased to 3600 in controls Thus, sputum eos are reduced with itraconazole; sputum ECP follows suit

Clinical Markers Asthma exacerbations: 0 if itraconazole vs 1.5 for controls over 16 weeks No improvement in FEV1 Conclusions: There are reductions in AIRWAY INFLAMMATION (induced sputum eos and sputum ECP) with itraconazole

Voriconazole Improved oral bioavailability than itraconazole Peripheral blood concentrations have……….100 fold interpatient variability vs 15 fold with itraconazole! Adverse effects of hepatic, ophthalmologic, photosensitivity Dosage in adults <65 yrs is 200mg bid

VORICONAZOLE THERAPY IN CHILDREN WITH CYSTIC FIBROSIS J Cyst Fibrosis 2005;4: CF children (ages 5-16 yrs) Monotherapy in 2 children, sustained improvement for 13 months Combined with steroids in 11 children with improvement Monotherapy in Af colonized, non-ABPA pts-no change in symptoms Adverse effects: 7 (33%) including photosensitivity, nausea, LFTs, alopecia

Question: The T ½ of Serum IgE is 6 days 5 days 23 days 2.3 days days

Omalizumab Case reports (some +, some -) Controlled trial for CF-ABPA initiated

Omalizumab (Thorax 2007;62:276-7)

Steroid dependency despite omalizumab treatment of ABPA in cystic fibrosis Allergy Volume 65, Issue 1, pages , 5 OCT 2009 DOI: /j x Volume 65, Issue 1,