PMID- 37795301 OWN - NLM STAT- PubMed-not-MEDLINE LR - 20231028 IS - 1664-302X (Print) IS - 1664-302X (Electronic) IS - 1664-302X (Linking) VI - 14 DP - 2023 TI - Syphilis and the host: multi-omic analysis of host cellular responses to Treponema pallidum provides novel insight into syphilis pathogenesis. PG - 1254342 LID - 10.3389/fmicb.2023.1254342 [doi] LID - 1254342 AB - INTRODUCTION: Syphilis is a chronic, multi-stage infection caused by the extracellular bacterium Treponema pallidum ssp. pallidum. Treponema pallidum widely disseminates through the vasculature, crosses endothelial, blood-brain and placental barriers, and establishes systemic infection. Although the capacity of T. pallidum to traverse the endothelium is well-described, the response of endothelial cells to T. pallidum exposure, and the contribution of this response to treponemal traversal, is poorly understood. METHODS: To address this knowledge gap, we used quantitative proteomics and cytokine profiling to characterize endothelial responses to T. pallidum. RESULTS: Proteomic analyses detected altered host pathways controlling extracellular matrix organization, necroptosis and cell death, and innate immune signaling. Cytokine analyses of endothelial cells exposed to T. pallidum revealed increased secretion of interleukin (IL)-6, IL-8, and vascular endothelial growth factor (VEGF), and decreased secretion of monocyte chemoattractant protein-1 (MCP-1). DISCUSSION: This study provides insight into the molecular basis of syphilis disease symptoms and the enhanced susceptibility of individuals infected with syphilis to HIV co-infection. These investigations also enhance understanding of the host response to T. pallidum exposure and the pathogenic strategies used by T. pallidum to disseminate and persist within the host. Furthermore, our findings highlight the critical need for inclusion of appropriate controls when conducting T. pallidum-host cell interactions using in vitro- and in vivo-grown T. pallidum. CI - Copyright (c) 2023 Waugh, Ranasinghe, Gomez, Houston, Lithgow, Eshghi, Fleetwood, Conway, Reynolds and Cameron. FAU - Waugh, Sean AU - Waugh S AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. FAU - Ranasinghe, Akash AU - Ranasinghe A AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. FAU - Gomez, Alloysius AU - Gomez A AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. FAU - Houston, Simon AU - Houston S AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. FAU - Lithgow, Karen V AU - Lithgow KV AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. FAU - Eshghi, Azad AU - Eshghi A AD - University of Victoria-Genome BC Proteomics Centre, Victoria, BC, Canada. FAU - Fleetwood, Jenna AU - Fleetwood J AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. FAU - Conway, Kate M E AU - Conway KME AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. FAU - Reynolds, Lisa A AU - Reynolds LA AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. FAU - Cameron, Caroline E AU - Cameron CE AD - Department of Biochemistry and Microbiology, University of Victoria, Victoria, BC, Canada. AD - Division of Allergy and Infectious Diseases, Department of Medicine, University of Washington, Seattle, WA, United States. LA - eng GR - R37 AI051334/AI/NIAID NIH HHS/United States GR - U19 AI144133/AI/NIAID NIH HHS/United States PT - Journal Article DEP - 20230919 PL - Switzerland TA - Front Microbiol JT - Frontiers in microbiology JID - 101548977 PMC - PMC10546344 OTO - NOTNLM OT - Treponema pallidum OT - disease symptoms OT - dissemination OT - proteomics OT - syphilis COIS- The authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest. EDAT- 2023/10/05 06:43 MHDA- 2023/10/05 06:44 PMCR- 2023/09/19 CRDT- 2023/10/05 04:09 PHST- 2023/07/07 00:00 [received] PHST- 2023/09/01 00:00 [accepted] PHST- 2023/10/05 06:44 [medline] PHST- 2023/10/05 06:43 [pubmed] PHST- 2023/10/05 04:09 [entrez] PHST- 2023/09/19 00:00 [pmc-release] AID - 10.3389/fmicb.2023.1254342 [doi] PST - epublish SO - Front Microbiol. 2023 Sep 19;14:1254342. doi: 10.3389/fmicb.2023.1254342. eCollection 2023.