PMID- 31288972 OWN - NLM STAT- MEDLINE DCOM- 20210715 LR - 20210715 IS - 1995-9133 (Electronic) IS - 1684-1182 (Linking) VI - 53 IP - 4 DP - 2020 Aug TI - Characterization of Salmonella resistance to bile during biofilm formation. PG - 518-524 LID - S1684-1182(18)30398-0 [pii] LID - 10.1016/j.jmii.2019.06.003 [doi] AB - BACKGROUND: Non-typhoid Salmonella infection may present as acute gastroenteritis or chronic infection, primarily in the bile-rich gallbladder. Biofilm formation is a mechanism of bile resistance in Salmonella. Our aim was to determine how Salmonella utilizes bile as a signal, and to study the relevance of the interaction between the PhoP-PhoQ two-component system and cyclic diguanosine monophosphate (c-di-GMP) signaling to biofilm formation. METHODS: Two-dimensional (2-D) gel electrophoresis was used to identify genes required for Salmonella biofilm formation in bile. Quantitative real-time PCR (qRT-PCR) was used to clarify the role of the PhoP-PhoQ two-component system and its interaction with genes involved in the c-di-GMP network during biofilm formation. RESULTS: Our result revealed that Salmonella mutants with incomplete outer membrane ( big up tri, openompA), defective flagella ( big up tri, openflgE), or incomplete PhoP-PhoQ two-component system ( big up tri, openphoP), were unable to develop complete biofilms in the presence of bile. Moreover, PhoP-PhoQ two-component system-related Salmonella mutants ( big up tri, openphoP, big up tri, openphoQ, big up tri, openphoP big up tri, openphoQ) had lower expression of c-di-GMP related genes (csgD, adrA) than the wild-type Salmonella strain had in the bile environment. CONCLUSION: Salmonella may sense and respond to bile through the PhoP-PhoQ two-component system during biofilm formation. Furthermore, the PhoP-PhoQ two-component system might activate regulators of the c-di-GMP signaling network. CI - Copyright (c) 2019. Published by Elsevier B.V. FAU - Tsai, Ming-Han AU - Tsai MH AD - Department of Pediatrics, Chang Gung Memorial Hospital, Keelung Branch, Keelung, Taiwan; Chang Gung University College of Medicine, Taoyuan, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan. FAU - Liang, Yi-Hua AU - Liang YH AD - Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan. FAU - Chen, Chyi-Liang AU - Chen CL AD - Chang Gung University College of Medicine, Taoyuan, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan. FAU - Chiu, Cheng-Hsun AU - Chiu CH AD - Chang Gung University College of Medicine, Taoyuan, Taiwan; Molecular Infectious Disease Research Center, Chang Gung Memorial Hospital, Taoyuan, Taiwan; Division of Pediatric Infectious Diseases, Department of Pediatrics, Chang Gung Children's Hospital, Taoyuan, Taiwan. Electronic address: chchiu@adm.cgmh.org.tw. LA - eng PT - Journal Article DEP - 20190625 PL - England TA - J Microbiol Immunol Infect JT - Journal of microbiology, immunology, and infection = Wei mian yu gan ran za zhi JID - 100956211 RN - 0 (Bacterial Proteins) RN - 125360-99-8 (PhoP protein, Bacteria) RN - 61093-23-0 (bis(3',5')-cyclic diguanylic acid) RN - H2D2X058MU (Cyclic GMP) SB - IM MH - Bacterial Proteins/genetics/metabolism MH - Bile/*metabolism MH - Biofilms/*growth & development MH - Cyclic GMP/analogs & derivatives/metabolism MH - Humans MH - Salmonella Infections/microbiology MH - Salmonella typhimurium/*genetics/*metabolism MH - *Signal Transduction OTO - NOTNLM OT - Bile OT - Biofilm OT - Salmonella EDAT- 2019/07/11 06:00 MHDA- 2021/07/16 06:00 CRDT- 2019/07/11 06:00 PHST- 2018/09/14 00:00 [received] PHST- 2019/05/05 00:00 [revised] PHST- 2019/06/06 00:00 [accepted] PHST- 2019/07/11 06:00 [pubmed] PHST- 2021/07/16 06:00 [medline] PHST- 2019/07/11 06:00 [entrez] AID - S1684-1182(18)30398-0 [pii] AID - 10.1016/j.jmii.2019.06.003 [doi] PST - ppublish SO - J Microbiol Immunol Infect. 2020 Aug;53(4):518-524. doi: 10.1016/j.jmii.2019.06.003. Epub 2019 Jun 25.