{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,4]],"date-time":"2026-08-04T22:26:33Z","timestamp":1785882393151,"version":"3.56.0"},"reference-count":65,"publisher":"MDPI AG","issue":"1","license":[{"start":{"date-parts":[[2021,1,16]],"date-time":"2021-01-16T00:00:00Z","timestamp":1610755200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Animals"],"abstract":"<jats:p>Neutrophils can originate neutrophil extracellular traps (NETs). Myeloperoxidase (MPO) is a peroxidase found in NETs associated to equine endometrosis and can be inhibited by 4-aminobenzoic acid hydrazide (ABAH). Metallopeptidases (MMPs) participate in extracellular matrix stability and fibrosis development. The objectives of this in vitro work were to investigate, in explants of mare\u2019s endometrium, (i) the ABAH capacity to inhibit MPO-induced collagen type I (COL1) expression; and (ii) the action of MPO and ABAH on the expression and gelatinolytic activity of MMP-2\/-9. Explants retrieved from the endometrium of mares in follicular or mid-luteal phases were treated with MPO, ABAH, or their combination, for 24 or 48 h. The qPCR analysis measured the transcription of COL1A2, MMP2, and MMP9. Western blot and zymography were performed to evaluate COL1 protein relative abundance and gelatinolytic activity of MMP-2\/-9, respectively. Myeloperoxidase elevated COL1 relative protein abundance at both treatment times in follicular phase (p &lt; 0.05). The capacity of ABAH to inhibit MPO-induced COL1 was detected in follicular phase at 48 h (p &lt; 0.05). The gelatinolytic activity of activated MMP-2 augmented in mid-luteal phase at 24 h after MPO treatment, but it was reduced with MPO+ABAH treatment. The activity of MMP-9 active form augmented in MPO-treated explants. However, this effect was inhibited by ABAH in the follicular phase at 48 h (p &lt; 0.05). By inhibiting the pro-fibrotic effects of MPO, it might be possible to reduce the development of endometrosis. Metallopeptidase-2 might be involved in an acute response to MPO in the mid-luteal phase, while MMP-9 might be implicated in a prolonged exposition to MPO in the follicular phase.<\/jats:p>","DOI":"10.3390\/ani11010208","type":"journal-article","created":{"date-parts":[[2021,1,18]],"date-time":"2021-01-18T05:17:34Z","timestamp":1610947054000},"page":"208","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":13,"title":["Myeloperoxidase Inhibition Decreases the Expression of Collagen and Metallopeptidase in Mare Endometria under In Vitro Conditions"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-0075-262X","authenticated-orcid":false,"given":"Ana","family":"Amaral","sequence":"first","affiliation":[{"name":"CIISA\u2014Centro de Investiga\u00e7\u00e3o Interdisciplinar em Sanidade Animal, Departamento de Morfologia e Fun\u00e7\u00e3o, Faculdade de Medicina Veterin\u00e1ria, Universidade de Lisboa, 1300-477 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Carina","family":"Fernandes","sequence":"additional","affiliation":[{"name":"CIISA\u2014Centro de Investiga\u00e7\u00e3o Interdisciplinar em Sanidade Animal, Departamento de Morfologia e Fun\u00e7\u00e3o, Faculdade de Medicina Veterin\u00e1ria, Universidade de Lisboa, 1300-477 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4389-445X","authenticated-orcid":false,"given":"Maria Rosa","family":"Rebord\u00e3o","sequence":"additional","affiliation":[{"name":"CIISA\u2014Centro de Investiga\u00e7\u00e3o Interdisciplinar em Sanidade Animal, Departamento de Morfologia e Fun\u00e7\u00e3o, Faculdade de Medicina Veterin\u00e1ria, Universidade de Lisboa, 1300-477 Lisboa, Portugal"},{"name":"Polytechnic of Coimbra, Coimbra Agriculture School, Bencanta, 3045-601 Coimbra, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Anna","family":"Sz\u00f3stek-Mioduchowska","sequence":"additional","affiliation":[{"name":"Institute of Animal Reproduction and Food Research, Polish Academy of Science, 10-748 Olsztyn, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Karolina","family":"Lukasik","sequence":"additional","affiliation":[{"name":"Institute of Animal Reproduction and Food Research, Polish Academy of Science, 10-748 Olsztyn, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Pedro","family":"Pinto-Bravo","sequence":"additional","affiliation":[{"name":"Polytechnic of Coimbra, Coimbra Agriculture School, Bencanta, 3045-601 Coimbra, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-3894-3488","authenticated-orcid":false,"given":"Lu\u00eds","family":"Telo da Gama","sequence":"additional","affiliation":[{"name":"CIISA\u2014Centro de Investiga\u00e7\u00e3o Interdisciplinar em Sanidade Animal, Departamento de Morfologia e Fun\u00e7\u00e3o, Faculdade de Medicina Veterin\u00e1ria, Universidade de Lisboa, 1300-477 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Dariusz","family":"Jan Skarzynski","sequence":"additional","affiliation":[{"name":"Institute of Animal Reproduction and Food Research, Polish Academy of Science, 10-748 Olsztyn, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0622-6513","authenticated-orcid":false,"given":"Gra\u00e7a","family":"Ferreira-Dias","sequence":"additional","affiliation":[{"name":"CIISA\u2014Centro de Investiga\u00e7\u00e3o Interdisciplinar em Sanidade Animal, Departamento de Morfologia e Fun\u00e7\u00e3o, Faculdade de Medicina Veterin\u00e1ria, Universidade de Lisboa, 1300-477 Lisboa, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2021,1,16]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1102","DOI":"10.1161\/01.ATV.0000163262.83456.6d","article-title":"Myeloperoxidase and Cardiovascular Disease","volume":"25","author":"Nicholls","year":"2005","journal-title":"ATVB"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"859","DOI":"10.1016\/j.bbrc.2015.10.053","article-title":"Myeloperoxidase-Derived Hypochlorous Acid Promotes Ox-LDL-Induced Senescence of Endothelial Cells through a Mechanism Involving \u03b2-Catenin Signaling in Hyperlipidemia","volume":"467","author":"Liu","year":"2015","journal-title":"Biochem. 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