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Molecular biology of Aspergillus allergens
Banani Banerjee1, Viswanath P Kurup
1Allergy-Immunology Division, Medical College of Wisconsin, 8701 Watertown Plank Road, Milwaukee, WI 53226, USA. banerjee@mcw.edu
Abstract:
Allergic Bronchopulmonary Aspergillosis (ABPA) is a severe respiratory disease caused by the fungus Aspergillus fumigatus (Af). It occurs as secondary complication mostly in patients with atopy and cystic fibrosis. The standardized and well-characterized allergens are essential for the immunodiagnosis of ABPA as well as for understanding the pathophysiology of the disease. Molecular cloning was resorted to obtain purified Af allergens for such studies. Currently, twenty-two recombinant Af allergens have been identified and characterized and several of these can be used as standardized allergens in in vitro and in vivo diagnosis of ABPA. The knowledge of primary, secondary, and tertiary structures of these allergens may facilitate the identification of immunodominant T and B cell epitopes and may be used to unravel the structure function relationship of these allergens. Such findings may open up novel avenues in the immune modulatory therapy and other effective intervention of the disease.
Insights
Allergic Bronchopulmonary Aspergillosis (ABPA) diagnosis and treatment benefit from purified Aspergillus fumigatus allergens. Recombinant allergens aid in understanding ABPA
Area of Science:
- Medical Mycology
- Immunology
- Allergy Research
Background:
- Allergic Bronchopulmonary Aspergillosis (ABPA) is a severe respiratory condition.
- It is frequently diagnosed in patients with atopy and cystic fibrosis.
- Accurate diagnosis and understanding of ABPA pathophysiology rely on well-characterized Aspergillus fumigatus (Af) allergens.
Purpose of the Study:
- To explore the role of molecular cloning in obtaining purified Af allergens.
- To highlight the significance of recombinant Af allergens in ABPA immunodiagnosis.
- To investigate how allergen structures can inform epitope identification and therapeutic strategies.
Main Methods:
- Utilizing molecular cloning techniques to produce purified Af allergens.
- Characterizing twenty-two recombinant Af allergens.
- Analyzing allergen structures to identify T and B cell epitopes.
Main Results:
- Twenty-two recombinant Af allergens have been successfully identified and characterized.
- Several of these recombinant allergens are suitable for standardized in vitro and in vivo ABPA diagnosis.
- Knowledge of allergen structures facilitates epitope mapping and understanding structure-function relationships.
Conclusions:
- Purified and characterized recombinant Af allergens are crucial for ABPA diagnosis and research.
- Structural insights into allergens can guide the development of novel immunomodulatory therapies for ABPA.
- Further research into allergen structures may unlock new intervention strategies for ABPA.