PMID- 29892291 OWN - NLM STAT- MEDLINE DCOM- 20190730 LR - 20190730 IS - 1664-3224 (Print) IS - 1664-3224 (Electronic) IS - 1664-3224 (Linking) VI - 9 DP - 2018 TI - Immunomodulation of Host Chitinase 3-Like 1 During a Mammary Pathogenic Escherichia coli Infection. PG - 1143 LID - 10.3389/fimmu.2018.01143 [doi] LID - 1143 AB - Chitin is a N-acetyl-d-glucosamine biopolymer that can be recognized by chitin-binding proteins. Although mammals lack chitin synthase, they induce proteins responsible for detecting chitin in response to bacterial infections. Our aim was to investigate whether chitinase 3-like 1 (CHI3L1) has a potential role in the innate immunity of the Escherichia coli (E. coli) infected mammary gland. CHI3L1 protein was found to be secreted in whey of naturally coliform-affected quarters compared to whey samples isolated from healthy udders. In addition, gene expression of CHI3L1 was confirmed in udder tissue of cows experimentally infected with a mammary pathogenic E. coli (MPEC) strain. Despite the known anatomical differences, the bovine udders' innate immune response was mimicked by applying an experimental mouse model using MPEC or non-MPEC isolates. The effect of CHI3L1 expression in the murine mammary gland in response to coliform bacteria was investigated through the use of CHI3L1(-/-) mice as well as through treatment with either a pan-caspase inhibitor or chitin particles in wild-type mice. The local induction of CHI3L1 postinfection with different E. coli strains was demonstrated to be independent of both bacterial growth and mammary interleukin (IL)-8 levels. Indeed, CHI3L1 emerged as a regulator impacting on the transcytosis of Ly6G-positive cells from the interstitial space into the alveolar lumen of the mammary tissue. Furthermore, CHI3L1 was found to be upstream regulated by caspase activity and had a major downstream effect on the local pro-inflammatory cytokine profile, including IL-1beta, IL-6, and RANTES/CCL5. In conclusion, CHI3L1 was demonstrated to play a key role in the cytokine and caspase signaling during E. coli triggered inflammation of the mammary gland. FAU - Breyne, Koen AU - Breyne K AD - Laboratory of Biochemistry, Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium. FAU - Steenbrugge, Jonas AU - Steenbrugge J AD - Laboratory of Biochemistry, Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium. FAU - Demeyere, Kristel AU - Demeyere K AD - Laboratory of Biochemistry, Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium. FAU - Lee, Chun Geun AU - Lee CG AD - Division of Biology and Medicine, Warren Alpert School of Medicine at Brown University, Providence, RI, United States. FAU - Elias, Jack A AU - Elias JA AD - Division of Biology and Medicine, Warren Alpert School of Medicine at Brown University, Providence, RI, United States. FAU - Petzl, Wolfram AU - Petzl W AD - Clinic for Ruminants with Ambulance and Herd Health Services, Centre for Clinical Veterinary Medicine, Ludwig-Maximilians-University of Munich, Munich, Germany. FAU - Smith, David G E AU - Smith DGE AD - Institute of Biological Chemistry, Biophysics and Bioengineering, Heriot-Watt University, Edinburgh, United Kingdom. FAU - Germon, Pierre AU - Germon P AD - INRA UMR 1282 Infectiologie et Sante Publique (ISP), Universite Francois Rabelais de Tours, Nouzilly, France. FAU - Meyer, Evelyne AU - Meyer E AD - Laboratory of Biochemistry, Department of Pharmacology, Toxicology and Biochemistry, Faculty of Veterinary Medicine, Ghent University, Merelbeke, Belgium. LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't DEP - 20180528 PL - Switzerland TA - Front Immunol JT - Frontiers in immunology JID - 101560960 RN - 0 (Chitinase-3-Like Protein 1) RN - 0 (Cytokines) RN - 1398-61-4 (Chitin) RN - EC 3.4.22.- (Caspases) MH - Animals MH - Bacterial Load MH - Caspases/metabolism MH - Cattle MH - Chitin/metabolism MH - Chitinase-3-Like Protein 1/genetics/*metabolism MH - Cytokines/metabolism MH - Disease Models, Animal MH - Escherichia coli/*immunology MH - Escherichia coli Infections/genetics/*immunology/microbiology MH - Female MH - Gene Expression MH - *Immunomodulation/genetics MH - Mastitis, Bovine/genetics/*immunology/*microbiology/pathology MH - Mice MH - Mice, Knockout PMC - PMC5985307 OTO - NOTNLM OT - Escherichia coli OT - bovine mastitis OT - chitinase 3-like 1 OT - immunomodulation OT - mouse mammary gland infection model EDAT- 2018/06/13 06:00 MHDA- 2018/06/13 06:01 PMCR- 2018/01/01 CRDT- 2018/06/13 06:00 PHST- 2017/11/15 00:00 [received] PHST- 2018/05/07 00:00 [accepted] PHST- 2018/06/13 06:00 [entrez] PHST- 2018/06/13 06:00 [pubmed] PHST- 2018/06/13 06:01 [medline] PHST- 2018/01/01 00:00 [pmc-release] AID - 10.3389/fimmu.2018.01143 [doi] PST - epublish SO - Front Immunol. 2018 May 28;9:1143. doi: 10.3389/fimmu.2018.01143. eCollection 2018.