Transcriptional responses of PBMC in psychosocially stressed animals indicate an alerting of the immune system in female but not in castrated male pigs.

TitleTranscriptional responses of PBMC in psychosocially stressed animals indicate an alerting of the immune system in female but not in castrated male pigs.
Publication TypeJournal Article
Year of Publication2014
AuthorsOster, M, Muráni, E, Ponsuksili, S, D'Eath, RB, Turner, SP, Evans, G, Thölking, L, Kurt, E, Klont, R, Foury, A, Mormède, P, Wimmers, K
JournalBMC Genomics
Volume15
Pagination967
Date Published2014
ISSN1471-2164
KeywordsAnimals, Cluster Analysis, Female, Gene Expression Profiling, Gene Expression Regulation, Immunity, Leukocytes, Mononuclear, Male, Orchiectomy, Phenotype, Receptors, Cell Surface, Receptors, Immunologic, Sex Factors, Signal Transduction, Stress, Psychological, Swine, Transcription, Genetic, Transcriptome
Abstract

BACKGROUND: Brain and immune system are linked in a bi-directional manner. To date, it remained largely unknown why immune components become suppressed, enhanced, or remain unaffected in relation to psychosocial stress. Therefore, we mixed unfamiliar pigs with different levels of aggressiveness. We separated castrated male and female pigs into psychosocially high- and low- stressed animals by skin lesions, plasma cortisol level, and creatine kinase activity obtained from agonistic behaviour associated with regrouping. Peripheral blood mononuclear cells (PBMC) were collected post-mortem and differential gene expression was assessed using the Affymetrix platform (n = 16).RESULTS: Relevant stress-dependent alterations were found only between female samples, but not between castrated male samples. Molecular routes related to TREM 1 signalling, dendritic cell maturation, IL-6 signalling, Toll-like receptor signalling, and IL-8 signalling were increased in high stressed females compared to low stressed females. This indicates a launch of immune effector molecules as a direct response. According to the shifts of transcripts encoding cell surface receptors (e.g. CD14, TLR2, TLR4, TREM1) the study highlights processes acting on pattern recognition, inflammation, and cell-cell communication.CONCLUSIONS: The transcriptional response partly affected the degree of 'stress responsiveness', indicating that the high stressed females altered their signal transduction due to potential infections and injuries while fighting.

DOI10.1186/1471-2164-15-967
Alternate JournalBMC Genomics
PubMed ID25380980
PubMed Central IDPMC4233077