Carvacrol attenuates Campylobacter jejuni colonization factors and proteome critical for persistence in the chicken gut.
| Autor: | Wagle BR; Department of Poultry Science, University of Arkansas, Fayetteville, AR, USA., Donoghue AM; Poultry Production and Product Safety Research Unit, United State Department of Agriculture-Agriculture Research Station, Fayetteville, AR, USA., Shrestha S; Department of Poultry Science, University of Arkansas, Fayetteville, AR, USA., Upadhyaya I; Department of Extension, University of Connecticut, Storrs, CT, USA., Arsi K; Department of Poultry Science, University of Arkansas, Fayetteville, AR, USA., Gupta A; Department of Poultry Science, University of Arkansas, Fayetteville, AR, USA., Liyanage R; Department of Chemistry and Biochemistry, University of Arkansas, Fayetteville, AR, USA., Rath NC; Poultry Production and Product Safety Research Unit, United State Department of Agriculture-Agriculture Research Station, Fayetteville, AR, USA., Donoghue DJ; Department of Poultry Science, University of Arkansas, Fayetteville, AR, USA., Upadhyay A; Department of Animal Science, University of Connecticut, Storrs, CT, USA. Electronic address: abhinav.upadhyay@uconn.edu. |
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| Jazyk: | angličtina |
| Zdroj: | Poultry science [Poult Sci] 2020 Sep; Vol. 99 (9), pp. 4566-4577. Date of Electronic Publication: 2020 Jul 02. |
| DOI: | 10.1016/j.psj.2020.06.020 |
| Abstrakt: | Campylobacter jejuni is a major foodborne pathogen that causes gastroenteritis in humans. Chickens act as the reservoir host for C. jejuni, wherein the pathogen asymptomatically colonizes the ceca leading to contamination of carcasses during slaughter. The major colonization factors in C. jejuni include motility, intestinal epithelial attachment, acid/bile tolerance, and quorum sensing. Reducing the expression of the aforementioned factors could potentially reduce C. jejuni colonization in chickens. This study investigated the efficacy of subinhibitory concentration (SIC; compound concentration not inhibiting bacterial growth) of carvacrol in reducing the expression of C. jejuni colonization factors in vitro. Moreover, the effect of carvacrol on the expression of C. jejuni proteome was investigated using liquid chromatography-tandem mass spectrometry. The motility assay was conducted at 42°C, and the motility zone was measured after 24 h of incubation. For the adhesion assay, monolayers of primary chicken enterocytes (∼10 5 cells/well) were inoculated with C. jejuni (6 log cfu/well) either in the presence or absence of carvacrol, and the adhered C. jejuni were enumerated after 90 min of incubation at 42°C. The effect of carvacrol on C. jejuni quorum sensing and susceptibility to acid/bile stress was investigated using a bioluminescence assay and an acid-bile survival assay, respectively. The SIC (0.002%) of carvacrol reduced the motility of C. jejuni strains S-8 and NCTC 81-176 by ∼50 and 35%, respectively (P < 0.05). Carvacrol inhibited C. jejuni S-8 and NCTC 81-176 adhesion to chicken enterocytes by ∼0.8 and 1.5 log cfu/mL, respectively (P < 0.05). Moreover, carvacrol reduced autoinducer-2 activity and increased the susceptibility of C. jejuni to acid and bile in both the strains (P < 0.05). Liquid chromatography-tandem mass spectrometry revealed that the SIC of carvacrol reduced the expression of selected C. jejuni colonization proteins critical for motility (methyl-accepting chemotaxis protein), adhesion (GroL), growth and metabolism (AspA, AcnB, Icd, Fba, Ppa, AnsA, Ldh, Eno, PurB-1), and anaerobic respiration (NapB, HydB, SdhA, NrfA) (P < 0.05). Results suggest the mechanisms by which carvacrol could reduce C. jejuni colonization in chickens. (Copyright © 2020. Published by Elsevier Inc.) |
| Databáze: | MEDLINE |
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