Ewasiuk Mikayla E, Uwiera Richard R E, Zak Louisa J, Grindflek Eli, Dyck Michael K
Department of Agricultural, Food, and Nutritional Science, University of Alberta, Edmonton, AB T6G 2P5, Canada.
Topigs Norsvin Research Center, Meerendonkweg 25, 5216 TZ Den Bosch, The Netherlands.
Animals (Basel). 2025 Aug 12;15(16):2366. doi: 10.3390/ani15162366.
Minimizing the risk of disease transmission, disseminating superior genetics, and reducing transportation costs are recognized advantages of embryo biotechnologies. These advantages make the development of a minimally invasive and repeatable procedure in pigs enticing, but simultaneously magnify the anatomical constraints. For decades, the swine industry has struggled to establish a universal procedure to collect pre-implantation embryos from pigs due to their long and convoluted uterine horns (UHs). Thus, the objectives were to evaluate the benefits of employing a transitional surgical model by shortening UH tissue using a 40 cm ipsilateral resection and assess the compensatory ovulatory response following an ovariectomy. The surgery was deemed successful as the UH was resected and the contralateral UH was fully ligated. The dam- and sire-line gilts exhibited ovarian hypertrophy between surgery and slaughter on the remaining ovary, illustrated by an increase in the number of corpora lutea (13.4 and 3.0 vs. 27.2 and 12; < 0.05, respectively) and intact ovary weight (11.9 and 7.7 vs. 25.9 vs. 38.7 g; < 0.05, respectively). This research is a vital step in assessing whether this interim surgical approach serves as a valuable method to advance the development of non-surgical techniques to collect pre-implantation embryos in pigs.
将疾病传播风险降至最低、传播优良基因以及降低运输成本是胚胎生物技术公认的优势。这些优势使得在猪身上开发一种微创且可重复的程序很有吸引力,但同时也放大了解剖学上的限制。几十年来,由于猪的子宫角长且弯曲,养猪业一直在努力建立一种从猪身上收集植入前胚胎的通用程序。因此,本研究的目的是评估采用一种过渡性手术模型的益处,即通过切除同侧40厘米的子宫角组织来缩短子宫角,并评估卵巢切除术后的代偿性排卵反应。手术被认为是成功的,因为子宫角被切除,对侧子宫角被完全结扎。母系和父系后备母猪在手术至屠宰期间,剩余卵巢出现卵巢肥大,表现为黄体数量增加(分别为13.4和3.0对27.2和12;P<0.05)以及完整卵巢重量增加(分别为11.9和7.7对25.9和38.7克;P<0.05)。这项研究是评估这种临时手术方法是否可作为推进猪非手术采集植入前胚胎技术发展的一种有价值方法的关键一步。