Transient and Prolonged Response of Chicken Cecum Mucosa to Colonization with Different Gut Microbiota

Jiri Volf (1) , Ondrej Polansky (1) , Karolina Varmuzova (1) , Lenka Gerzova (1) , Zuzana Sekelova (1) , Marcela Faldynova (1) , Vladimir Babak (1) , Matej Medvecky (1) , Adrian L Smith (2) , Bernd Kaspers (3) , Philippe Velge (4) , Ivan Rychlik (1)

1 Veterinary Research Institute
2 Department of Zoology
3 Department for Veterinary Sciences, Institute for Animal Physiology, Faculty of Veterinary Medicine
4 UMR ISP - Infectiologie et Santé Publique

In this study we determined protein and gene expression in the caeca of newly hatched chickens inoculated with cecal contents sourced from hens of different ages. Over 250 proteins exhibited modified expression levels in response to microbiota inoculation. The most significant inductions were observed for ISG12-2, OASL, ES1, LYG2, DMBT1-L, CDD, ANGPTL6, B2M, CUZD1, IgM and Ig lambda chain. Of these, ISG12-2, ES1 and both immunoglobulins were expressed at lower levels in germ-free chickens compared to conventional chickens. In contrast, CELA2A, BRT-2, ALDH1A1, ADH1C, AKR1B1L, HEXB, ALDH2, ALDOB, CALB1 and TTR were expressed at lower levels following inoculation of microbiota. When chicks were given microbiota preparations from different age donors, the recipients mounted differential responses to the inoculation which also differed from the response profile in naturally colonised birds. For example, B2M, CUZD1 and CELA2A responded differently to the inoculation with microbiota of 4- or 40-week-old hens. The increased or decreased gene expression could be recorded 6 weeks after the inoculation of newly hatched chickens. To characterise the proteins that may directly interact with the microbiota we characterised chicken proteins that co-purified with the microbiota and identified a range of host proteins including CDD, ANGPTL6, DMBT1-L, MEP1A and Ig lambda. We propose that induction of ISG12-2 results in reduced apoptosis of host cells exposed to the colonizing commensal microbiota and that CDD, ANGPTL6, DMBT1-L, MEP1A and Ig lambda reduce contact of luminal microbiota with the gut epithelium thereby reducing the inflammatory response.

Domaines: Médecine vétérinaire et santé animale

Jiri Volf, Ondrej Polansky, Karolina Varmuzova, Lenka Gerzova, Zuzana Sekelova, et al.. Transient and Prolonged Response of Chicken Cecum Mucosa to Colonization with Different Gut Microbiota. PLoS ONE, 2016, 11 (9), 18 p. ⟨10.1371/journal.pone.0163932⟩. ⟨hal-01381919⟩