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Cytokine and eicosanoid regulation by Schistosoma mansoniduring LSE penetration
Cercarial penetration, in low to moderate numbers, does not cause a normal skin inflammatory response; therefore, the authors sought to determine whether cercariae can down-regulate keratinocyte activation and thus the secretion of pro-inflammatory cytokines and eicosanoids. Human living skin equiva...
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Formato: | Texto |
Lenguaje: | English |
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Hindawi Publishing Corporation
1993
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Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2365383/ https://www.ncbi.nlm.nih.gov/pubmed/18475506 http://dx.doi.org/10.1155/S0962935193000109 |
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author | Fusco, A. C. Salafsky, B. Shibuya, T. |
author_facet | Fusco, A. C. Salafsky, B. Shibuya, T. |
author_sort | Fusco, A. C. |
collection | PubMed |
description | Cercarial penetration, in low to moderate numbers, does not cause a normal skin inflammatory response; therefore, the authors sought to determine whether cercariae can down-regulate keratinocyte activation and thus the secretion of pro-inflammatory cytokines and eicosanoids. Human living skin equivalent (LSE, Organogenesis) consisting of dermal, epidermal and stratum corneum-like layers was used as the skin substrate. The surface of the LSE membrane was exposed to 100 ng IFNγ or ~850 cercariae for 18 h. Incubation media and tissue was then assayed for IL-1α, IL-6, IL-8, TNFα, 5-HETE, 12-HETE, PGF(2), LTB(4), and LTC(4) via RIA and Western Blots. TNFα was not detected. Secreted IL-1α levels were (mean ± S.E.M. (n)): Control, 1.03 ng ± 0.15 (11); IFNγ 1.90 ng ± 0.48 (5); cercariae, 1.79 ng ± 0.22 (22). In spite of this increase, cercariae down-regulated IL-8 (cercariae 11.13 ± 1.70 ng vs. IFNγ = 16.47 ± 0.29 ng, p = 0.04) and LTB(4) (cercariae = 98.86 ± 19.65 pg/0.1 ml vs. IFNγ = 193.42 ± 44.21 pg/0.1 ml p = 0.02). No changes were seen in IL-6, 12-HETE, 5-HETE, and PGE(2) levels. It is concluded that cercarial penetration causes a release of IL-1α consistent with skin trauma; however, schistosomulae may regulate the production of chemotactic (neutrophils, macrophages, T-cells, etc.) and activation factors such as IL-8 and LTB(4). |
format | Text |
id | pubmed-2365383 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1993 |
publisher | Hindawi Publishing Corporation |
record_format | MEDLINE/PubMed |
spelling | pubmed-23653832008-05-12 Cytokine and eicosanoid regulation by Schistosoma mansoniduring LSE penetration Fusco, A. C. Salafsky, B. Shibuya, T. Mediators Inflamm Research Article Cercarial penetration, in low to moderate numbers, does not cause a normal skin inflammatory response; therefore, the authors sought to determine whether cercariae can down-regulate keratinocyte activation and thus the secretion of pro-inflammatory cytokines and eicosanoids. Human living skin equivalent (LSE, Organogenesis) consisting of dermal, epidermal and stratum corneum-like layers was used as the skin substrate. The surface of the LSE membrane was exposed to 100 ng IFNγ or ~850 cercariae for 18 h. Incubation media and tissue was then assayed for IL-1α, IL-6, IL-8, TNFα, 5-HETE, 12-HETE, PGF(2), LTB(4), and LTC(4) via RIA and Western Blots. TNFα was not detected. Secreted IL-1α levels were (mean ± S.E.M. (n)): Control, 1.03 ng ± 0.15 (11); IFNγ 1.90 ng ± 0.48 (5); cercariae, 1.79 ng ± 0.22 (22). In spite of this increase, cercariae down-regulated IL-8 (cercariae 11.13 ± 1.70 ng vs. IFNγ = 16.47 ± 0.29 ng, p = 0.04) and LTB(4) (cercariae = 98.86 ± 19.65 pg/0.1 ml vs. IFNγ = 193.42 ± 44.21 pg/0.1 ml p = 0.02). No changes were seen in IL-6, 12-HETE, 5-HETE, and PGE(2) levels. It is concluded that cercarial penetration causes a release of IL-1α consistent with skin trauma; however, schistosomulae may regulate the production of chemotactic (neutrophils, macrophages, T-cells, etc.) and activation factors such as IL-8 and LTB(4). Hindawi Publishing Corporation 1993 /pmc/articles/PMC2365383/ /pubmed/18475506 http://dx.doi.org/10.1155/S0962935193000109 Text en Copyright © 1993 Hindawi Publishing Corporation. http://creativecommons.org/licenses/by/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. |
spellingShingle | Research Article Fusco, A. C. Salafsky, B. Shibuya, T. Cytokine and eicosanoid regulation by Schistosoma mansoniduring LSE penetration |
title | Cytokine and eicosanoid regulation by Schistosoma mansoniduring LSE penetration |
title_full | Cytokine and eicosanoid regulation by Schistosoma mansoniduring LSE penetration |
title_fullStr | Cytokine and eicosanoid regulation by Schistosoma mansoniduring LSE penetration |
title_full_unstemmed | Cytokine and eicosanoid regulation by Schistosoma mansoniduring LSE penetration |
title_short | Cytokine and eicosanoid regulation by Schistosoma mansoniduring LSE penetration |
title_sort | cytokine and eicosanoid regulation by schistosoma mansoniduring lse penetration |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2365383/ https://www.ncbi.nlm.nih.gov/pubmed/18475506 http://dx.doi.org/10.1155/S0962935193000109 |
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