Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria

Horlock, Anthony; Ormsby, Thomas; Owens, Sian-eleri; Horlock, Anthony D.; Davies, Daphne; Griffiths, William; Wang, Yuqin; Cronin, James; Bromfield, John J.; Sheldon, Martin

doi:10.1096/fj.202100036r

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Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria

Anthony Horlock

, Thomas Ormsby, Sian-eleri Owens

, Anthony D. Horlock, Daphne Davies, William Griffiths

, Yuqin Wang

, James Cronin

, John J. Bromfield, Martin Sheldon

The FASEB Journal, Volume: 35, Issue: 10, Pages: 1 - 21

Swansea University Authors: Anthony Horlock , Thomas Ormsby, Sian-eleri Owens , William Griffiths , Yuqin Wang , James Cronin , Martin Sheldon

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DOI (Published version): 10.1096/fj.202100036r

Abstract

Many species of pathogenic bacteria secrete toxins that form pores in mammalian cell membranes. These membrane pores enable the delivery of virulence factors into cells, result in the leakage of molecules that bacteria can use as nutrients, and facilitate pathogen invasion. Inflammatory responses to...

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Published in:	The FASEB Journal
ISSN:	0892-6638 1530-6860
Published:	Wiley 2021
Online Access:	Check full text
URI:	https://cronfa.swan.ac.uk/Record/cronfa57632

first_indexed	2021-09-29T11:39:21Z
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These membrane pores enable the delivery of virulence factors into cells, result in the leakage of molecules that bacteria can use as nutrients, and facilitate pathogen invasion. Inflammatory responses to bacteria are regulated by the side-chain-hydroxycholesterols 27-hydroxycholesterol and 25-hydroxycholesterol, but their effect on the intrinsic protection of cells against pore-forming toxins is unclear. Here, we tested the hypothesis that 27-hydroxycholesterol and 25-hydroxycholesterol help protect cells against pore-forming toxins. We treated bovine endometrial epithelial and stromal cells with 27-hydroxycholesterol or 25-hydroxycholesterol, and then challenged the cells with pyolysin, which is a cholesterol-dependent cytolysin from Trueperella pyogenes that targets these endometrial cells. We found that treatment with 27-hydroxycholesterol or 25-hydroxycholesterol protected both epithelial and stomal cells against pore formation and the damage caused by pyolysin. The oxysterols limited pyolysin-induced leakage of potassium and lactate dehydrogenase from cells, and reduced cytoskeletal changes and cytolysis. This oxysterol cytoprotection against pyolysin was partially dependent on reducing cytolysin-accessible cholesterol in the cell membrane and on activating liver X receptors. Treatment with 27-hydroxycholesterol also protected the endometrial cells against Staphylococcus aureus α hemolysin. Using mass spectrometry, we found 27-hydroxycholesterol and 25-hydroxycholesterol in uterine and follicular fluid. Furthermore, epithelial cells released additional 25-hydroxycholesterol in response to pyolysin. In conclusion, both 27-hydroxycholesterol and 25-hydroxycholesterol increased the intrinsic protection of bovine endometrial cells against pore-forming toxins. 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spelling	2022-10-27T11:36:46.9506930 v2 57632 2021-08-18 Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria 4191b316c42c893bec2cada92597ad44 0000-0001-9580-552X Anthony Horlock Anthony Horlock true false c8a0f774d8ff66a2193a035018cc6cda Thomas Ormsby Thomas Ormsby true false 721deb4604d122019244cfdf08820cbe 0000-0003-1806-5235 Sian-eleri Owens Sian-eleri Owens true false 3316b1d1b524be1831790933eed1c26e 0000-0002-4129-6616 William Griffiths William Griffiths true false c92729b58622f9fdf6a0e7d8f4ce5081 0000-0002-3063-3066 Yuqin Wang Yuqin Wang true false 9cfd17551c0d1f7438895121e4fbb6e8 0000-0002-0590-9462 James Cronin James Cronin true false ab0f74b794e59cc270c69e63ee1d9748 Martin Sheldon Martin Sheldon true false 2021-08-18 CBAE Many species of pathogenic bacteria secrete toxins that form pores in mammalian cell membranes. These membrane pores enable the delivery of virulence factors into cells, result in the leakage of molecules that bacteria can use as nutrients, and facilitate pathogen invasion. Inflammatory responses to bacteria are regulated by the side-chain-hydroxycholesterols 27-hydroxycholesterol and 25-hydroxycholesterol, but their effect on the intrinsic protection of cells against pore-forming toxins is unclear. Here, we tested the hypothesis that 27-hydroxycholesterol and 25-hydroxycholesterol help protect cells against pore-forming toxins. We treated bovine endometrial epithelial and stromal cells with 27-hydroxycholesterol or 25-hydroxycholesterol, and then challenged the cells with pyolysin, which is a cholesterol-dependent cytolysin from Trueperella pyogenes that targets these endometrial cells. We found that treatment with 27-hydroxycholesterol or 25-hydroxycholesterol protected both epithelial and stomal cells against pore formation and the damage caused by pyolysin. The oxysterols limited pyolysin-induced leakage of potassium and lactate dehydrogenase from cells, and reduced cytoskeletal changes and cytolysis. This oxysterol cytoprotection against pyolysin was partially dependent on reducing cytolysin-accessible cholesterol in the cell membrane and on activating liver X receptors. Treatment with 27-hydroxycholesterol also protected the endometrial cells against Staphylococcus aureus α hemolysin. Using mass spectrometry, we found 27-hydroxycholesterol and 25-hydroxycholesterol in uterine and follicular fluid. Furthermore, epithelial cells released additional 25-hydroxycholesterol in response to pyolysin. In conclusion, both 27-hydroxycholesterol and 25-hydroxycholesterol increased the intrinsic protection of bovine endometrial cells against pore-forming toxins. Our findings imply that side-chain-hydroxycholesterols may help defend the endometrium against pathogenic bacteria. Journal Article The FASEB Journal 35 10 1 21 Wiley 0892-6638 1530-6860 Cattle, cholesterol, cytoprotection, liver X receptor, uterus 1 10 2021 2021-10-01 10.1096/fj.202100036r COLLEGE NANME Management School COLLEGE CODE CBAE Swansea University SU Library paid the OA fee (TA Institutional Deal) This study was supported by Eunice Kennedy Shriver National Institute of Child Health & Human Development of the National Institutes of Health under Award Number R01HD084316. Instrumentation for oxysterol analysis was funded by Biotechnology and Biological Sciences Research Council grants BB/I001735/1 and BB/L001942/1, and the European Union via European Structural Funds as part of the Welsh Government funded Academic Expertise for Business project HE09161003. 2022-10-27T11:36:46.9506930 2021-08-18T09:13:20.7290773 Faculty of Medicine, Health and Life Sciences Swansea University Medical School - Medicine Anthony Horlock 0000-0001-9580-552X 1 Thomas Ormsby 2 Sian-eleri Owens 0000-0003-1806-5235 3 Anthony D. Horlock 4 Daphne Davies 5 William Griffiths 0000-0002-4129-6616 6 Yuqin Wang 0000-0002-3063-3066 7 James Cronin 0000-0002-0590-9462 8 John J. Bromfield 9 Martin Sheldon 10 57632__21051__c8145150a083454ca694b73984060628.pdf ORMSBYfj202100036R.pdf 2021-09-29T12:40:44.0642284 Output 3779382 application/pdf Version of Record true © 2021 The Authors. This is an open access article under the terms of the Creative Commons Attribution License true eng http://creativecommons.org/licenses/by/4.0/
title	Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria
spellingShingle	Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria Anthony Horlock Thomas Ormsby Sian-eleri Owens William Griffiths Yuqin Wang James Cronin Martin Sheldon
title_short	Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria
title_full	Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria
title_fullStr	Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria
title_full_unstemmed	Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria
title_sort	Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria
author_id_str_mv	4191b316c42c893bec2cada92597ad44 c8a0f774d8ff66a2193a035018cc6cda 721deb4604d122019244cfdf08820cbe 3316b1d1b524be1831790933eed1c26e c92729b58622f9fdf6a0e7d8f4ce5081 9cfd17551c0d1f7438895121e4fbb6e8 ab0f74b794e59cc270c69e63ee1d9748
author_id_fullname_str_mv	4191b316c42c893bec2cada92597ad44_*_Anthony Horlock c8a0f774d8ff66a2193a035018cc6cda__Thomas Ormsby 721deb4604d122019244cfdf08820cbe__Sian-eleri Owens 3316b1d1b524be1831790933eed1c26e__William Griffiths c92729b58622f9fdf6a0e7d8f4ce5081__Yuqin Wang 9cfd17551c0d1f7438895121e4fbb6e8__James Cronin ab0f74b794e59cc270c69e63ee1d9748_**_Martin Sheldon
author	Anthony Horlock Thomas Ormsby Sian-eleri Owens William Griffiths Yuqin Wang James Cronin Martin Sheldon
author2	Anthony Horlock Thomas Ormsby Sian-eleri Owens Anthony D. Horlock Daphne Davies William Griffiths Yuqin Wang James Cronin John J. Bromfield Martin Sheldon
format	Journal article
container_title	The FASEB Journal
container_volume	35
container_issue	10
container_start_page	1
publishDate	2021
institution	Swansea University
issn	0892-6638 1530-6860
doi_str_mv	10.1096/fj.202100036r
publisher	Wiley
college_str	Faculty of Medicine, Health and Life Sciences
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hierarchy_top_title	Faculty of Medicine, Health and Life Sciences
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hierarchy_parent_title	Faculty of Medicine, Health and Life Sciences
department_str	Swansea University Medical School - Medicine{{{_:::_}}}Faculty of Medicine, Health and Life Sciences{{{_:::_}}}Swansea University Medical School - Medicine
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description	Many species of pathogenic bacteria secrete toxins that form pores in mammalian cell membranes. These membrane pores enable the delivery of virulence factors into cells, result in the leakage of molecules that bacteria can use as nutrients, and facilitate pathogen invasion. Inflammatory responses to bacteria are regulated by the side-chain-hydroxycholesterols 27-hydroxycholesterol and 25-hydroxycholesterol, but their effect on the intrinsic protection of cells against pore-forming toxins is unclear. Here, we tested the hypothesis that 27-hydroxycholesterol and 25-hydroxycholesterol help protect cells against pore-forming toxins. We treated bovine endometrial epithelial and stromal cells with 27-hydroxycholesterol or 25-hydroxycholesterol, and then challenged the cells with pyolysin, which is a cholesterol-dependent cytolysin from Trueperella pyogenes that targets these endometrial cells. We found that treatment with 27-hydroxycholesterol or 25-hydroxycholesterol protected both epithelial and stomal cells against pore formation and the damage caused by pyolysin. The oxysterols limited pyolysin-induced leakage of potassium and lactate dehydrogenase from cells, and reduced cytoskeletal changes and cytolysis. This oxysterol cytoprotection against pyolysin was partially dependent on reducing cytolysin-accessible cholesterol in the cell membrane and on activating liver X receptors. Treatment with 27-hydroxycholesterol also protected the endometrial cells against Staphylococcus aureus α hemolysin. Using mass spectrometry, we found 27-hydroxycholesterol and 25-hydroxycholesterol in uterine and follicular fluid. Furthermore, epithelial cells released additional 25-hydroxycholesterol in response to pyolysin. In conclusion, both 27-hydroxycholesterol and 25-hydroxycholesterol increased the intrinsic protection of bovine endometrial cells against pore-forming toxins. Our findings imply that side-chain-hydroxycholesterols may help defend the endometrium against pathogenic bacteria.
published_date	2021-10-01T05:17:29Z
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score	11.2862625

Oxysterols protect bovine endometrial cells against pore‐forming toxins from pathogenic bacteria

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