{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,8,11]],"date-time":"2026-08-11T04:30:57Z","timestamp":1786422657430,"version":"build-2736575974"},"reference-count":23,"publisher":"MDPI AG","issue":"16","license":[{"start":{"date-parts":[[2026,8,8]],"date-time":"2026-08-08T00:00:00Z","timestamp":1786147200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100004442","name":"National Science Centre","doi-asserted-by":"publisher","award":["2025\/09\/X\/NZ3\/00003"],"award-info":[{"award-number":["2025\/09\/X\/NZ3\/00003"]}],"id":[{"id":"10.13039\/501100004442","id-type":"DOI","asserted-by":"publisher"}]},{"award":["2025\/09\/X\/NZ3\/00003"],"award-info":[{"award-number":["2025\/09\/X\/NZ3\/00003"]}],"id":[{"id":"https:\/\/ror.org\/03ha2q922","id-type":"ROR","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100017637","name":"Wroclaw University of Environmental and Life Sciences","doi-asserted-by":"crossref","id":[{"id":"10.13039\/501100017637","id-type":"DOI","asserted-by":"crossref"}]},{"id":[{"id":"https:\/\/ror.org\/05cs8k179","id-type":"ROR","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Int. J. Mol. Sci.","IJMS"],"abstract":"<jats:p>Paternal contributions to preimplantation embryo development are increasingly recognized as an important component of reproductive success, but the associations between male reproductive phenotype, early embryonic competence, and embryo molecular characteristics remain insufficiently defined. Using bovine in vitro embryo production as a translational large-mammalian model, this study evaluated whether paternal reproductive phenotype and oocyte origin were associated with embryo developmental performance and embryonic sirtuin expression. Oocytes obtained from mature cows or heifers were fertilized with semen from bulls differing in reproductive status, including bulls characterized by libido disturbances and irregular semen collection. Fertilization, cleavage, blastocyst formation, and hatching were assessed, while embryonic SIRT2, SIRT3, SIRT6, and SIRT7 expression was quantified by immunofluorescence. Early developmental endpoints were relatively preserved, whereas differences were more evident at later stages of preimplantation development. Cow-derived oocytes were associated with higher hatching rates than heifer-derived oocytes. Embryos generated using semen from bulls with an impaired reproductive phenotype showed lower developmental competence and lower SIRT6 and SIRT7 expression. SIRT6 expression showed the strongest positive correlation with hatching, and positive correlations were also observed among the analyzed sirtuins. These findings indicate that paternal reproductive phenotype and oocyte origin are associated with bovine embryo developmental competence and embryonic sirtuin profiles. Embryonic SIRT6 and SIRT7 expression may represent candidate molecular indicators of embryo competence; however, causal relationships cannot be inferred from the present study design.<\/jats:p>","DOI":"10.3390\/ijms27167115","type":"journal-article","created":{"date-parts":[[2026,8,10]],"date-time":"2026-08-10T09:24:53Z","timestamp":1786353893000},"page":"7115","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":0,"title":["Altered Embryonic SIRT6 and SIRT7 Expression Is Associated with Impaired Developmental Competence and Oocyte-Dependent Embryo Quality in Embryos Derived from Subfertile Males"],"prefix":"10.3390","volume":"27","author":[{"given":"Alicja","family":"Kowalczyk","sequence":"first","affiliation":[{"name":"Department of Environment Hygiene and Animal Welfare, Wroc\u0142aw University of Environmental and Life Sciences, Che\u0142mo\u0144skiego 38C, 51-630 Wroc\u0142aw, Poland"},{"name":"Research and Development Center, Voivodeship Specialist Hospital in Wroc\u0142aw, 51-124 Wroc\u0142aw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0179-7280","authenticated-orcid":false,"given":"Mercedes Cami\u00f1a","family":"Garc\u00eda","sequence":"additional","affiliation":[{"name":"Department of Physiology, Faculty of Veterinary, University of Santiago de Compostela, 27002 Lugo, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5357-4428","authenticated-orcid":false,"given":"Jos\u00e9 \u00c1ngel","family":"Hern\u00e1ndez Malag\u00f3n","sequence":"additional","affiliation":[{"name":"COPAR (GI-2120) Research Group, Department of Animal Pathology, Faculty of Veterinary, University of Santiago de Compostela, 27002 Lugo, Spain"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1232-3160","authenticated-orcid":false,"given":"Jose Pedro","family":"Araujo","sequence":"additional","affiliation":[{"name":"Mountain Research Centre, Escola Superior Agr\u00e1ria, Instituto Polit\u00e9cnico de Viana do Castelo, 4900-347 Viana do Castelo, Portugal"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-0595-2524","authenticated-orcid":false,"given":"Ivona","family":"\u017dura \u017daja","sequence":"additional","affiliation":[{"name":"Department of Physiology and Radiobiology, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1186-4774","authenticated-orcid":false,"given":"Marko","family":"Pe\u0107in","sequence":"additional","affiliation":[{"name":"Clinic for Surgery, Orthopedics and Ophthalmology, Faculty of Veterinary Medicine, University of Zagreb, 10000 Zagreb, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-8013-2091","authenticated-orcid":false,"given":"Dra\u017een","family":"\u0110uri\u010di\u0107","sequence":"additional","affiliation":[{"name":"Department of Physiology and Radiobiology, Faculty of Veterinary Medicine, University of Zagreb, Heinzelova 55, 10000 Zagreb, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"El\u017cbieta","family":"Ga\u0142\u0119ska","sequence":"additional","affiliation":[{"name":"Department of Environment Hygiene and Animal Welfare, Wroc\u0142aw University of Environmental and Life Sciences, Che\u0142mo\u0144skiego 38C, 51-630 Wroc\u0142aw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Zbigniew","family":"Dobrza\u0144ski","sequence":"additional","affiliation":[{"name":"Department of Environment Hygiene and Animal Welfare, Wroc\u0142aw University of Environmental and Life Sciences, Che\u0142mo\u0144skiego 38C, 51-630 Wroc\u0142aw, Poland"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-0402-3173","authenticated-orcid":false,"given":"Marko","family":"Samard\u017eija","sequence":"additional","affiliation":[{"name":"Clinic of Obstetrics and Reproduction, Faculty of Veterinary Medicine, University of Zagreb, 10000 Zagreb, Croatia"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"1968","published-online":{"date-parts":[[2026,8,8]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Li, Y., Lu, T., Wu, Z., Wang, Z., Yu, T., Wang, H., Tang, C., and Zhou, Y. 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