On the adaptive significance of stress-induced immunosuppression
Författare
Summary, in English
We approach the field of stress immunology from an ecological point of view and ask: why should a heavy physical workload, for example as a result of a high reproductive effort, compromise immune function? We argue that immunosuppression by neuroendocrine mechanisms, such as stress hormones, during heavy physical workload is adaptive, and consider two different ultimate explanations of such immunosuppression. First, several authors have suggested that the immune system is suppressed to reallocate resources to other metabolic demands. In our view, this hypothesis assumes that considerable amounts of energy or nutrients can be saved by suppressing the immune system; however, this assumption requires further investigation. Second, we suggest an alternative explanation based on the idea that the immune system is tightly regulated by neuroendocrine mechanisms to avoid hyperactivation and ensuing autoimmune responses. We hypothesize that the risk of autoimmune responses increases during heavy physical workload and that the immune system is suppressed to counteract this.
Avdelning/ar
Publiceringsår
1998
Språk
Engelska
Sidor
1637-1641
Publikation/Tidskrift/Serie
Royal Society of London. Proceedings B. Biological Sciences
Volym
265
Issue
1406
Länkar
Dokumenttyp
Artikel i tidskrift
Förlag
Royal Society Publishing
Ämne
- Biological Sciences
Nyckelord
- immune-system
- strenuous exercise
- reproductive effort
- pituitary-adrenal axis
- exercise
- strenuous
- sexual selection
- cost of reproduction
- immunocompetence
- autoimmunity
- proteins
- cost
- recognition
- hypotheses
- endocrine
Status
Published
Projekt
- Immunoecology
Forskningsgrupp
- Molecular Ecology and Evolution Lab
- Evolution and Ecology of Phenotypes in Nature
ISBN/ISSN/Övrigt
- ISSN: 1471-2954