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[Role of local immunity in invasive pulmonary aspergillosis]
D Aldebert1, C Pinel, J P Brion
1Laboratoire Interactions cellulaires Parasites-Hôte EA-2940, Faculté de Médecine-Pharmacie, Université Joseph Fourier, Grenoble I, La Tronche. Delphine.Aldebert@ujf-grenoble.fr
Abstract:
A LEADING CAUSE OF MORTALITY: Inhalation of fungal spores may cause infection and/or inflammation, which is dependent on the nature of the fungus as well as the individual's immune status. Aspergillus fumigatus is responsible for a dramatic pathology, invasive aspergillosis (IA). IA has become a leading cause of death, mainly among bone marrow transplantation or solid-organ recipients, but also among AIDS patients. IMMUNE RESPONSE: The diversity of immune failure suggests that many lines of immunity are implicated in the A. fumigatus elimination process. Non specific immunity plays a major role in the defence against A. fumigatus, including three major lines: anatomical barriers, humoral components, phagocytic cells. But acquired immunity plays a role with different T-cell subsets and their associated cytokines. FUNGUS-HOST RELATIONSHIPS: The relationship between the fungus and its host is complex and could be again study to improve the prevention and the treatment of IA. The aim of this review is a synthesis of the knowledge about the immunity response against Aspergillus fumigatus in IA.
Insights
Invasive aspergillosis (IA), caused by Aspergillus fumigatus, is a major cause of mortality, especially in immunocompromised patients. Understanding the complex immune response is key to improving IA prevention and treatment.
Area of Science:
- Immunology
- Mycology
- Infectious Diseases
Background:
- Inhalation of fungal spores, particularly Aspergillus fumigatus, can lead to severe infections and inflammation.
- Invasive aspergillosis (IA) is a significant cause of mortality, particularly in immunocompromised individuals like organ transplant recipients and AIDS patients.
Purpose of the Study:
- To synthesize current knowledge on the immune response against Aspergillus fumigatus in the context of invasive aspergillosis.
- To explore the complex fungus-host relationships in IA to inform prevention and treatment strategies.
Main Methods:
- This review synthesizes existing research on the immunological mechanisms involved in combating Aspergillus fumigatus.
- It examines both non-specific and acquired immunity components.
Main Results:
- Non-specific immunity, involving anatomical barriers, humoral factors, and phagocytic cells, plays a crucial role in defense against A. fumigatus.
- Acquired immunity, mediated by T-cell subsets and cytokines, also contributes to the elimination of the fungus.
- The interaction between Aspergillus fumigatus and the host immune system is intricate.
Conclusions:
- A comprehensive understanding of the immune response to Aspergillus fumigatus is essential for developing effective strategies against invasive aspergillosis.
- Further research into fungus-host interactions holds promise for improved prevention and treatment of IA.