Spermatozoa and seminal plasma induce a greater inflammatory response in the ovine uterus at oestrus than dioestrus

Scott, Jennifer L., Ketheesan, Natkunam, and Summers, Phillip M. (2009) Spermatozoa and seminal plasma induce a greater inflammatory response in the ovine uterus at oestrus than dioestrus. Reproduction, Fertility and Development, 21 (7). pp. 817-826.

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Leukocyte infiltration and increased synthesis of cytokines in response to insemination is considered to enhance reproductive success. The present study investigated the inflammatory response to whole semen, spermatozoa and seminal plasma, with and without the addition of antibiotics, in the ovine uterus at oestrus and dioestrus. Seminal plasma and spermatozoa both contributed to increased IL-8 secretion (P <0.01) by endometrial epithelial cells and a concurrent infiltration by neutrophils (P <0.01). Increased GM-CSF secretion (P <0.01) occurred in response to whole semen and spermatozoa when antibiotics were not used. Macrophages and eosinophils increased (P <0.05) in the endometrial stroma when antibiotics were not used, and fewer mast cells were detected in the deep endometrial stroma after treatments containing antibiotics (P <0.05). Neutrophil and IL-8 responses to insemination were greater at oestrus (P <0.01) than at dioestrus and the GM-CSF response followed a similar trend. Eosinophil numbers were increased at oestrus (P <0.01) but minimally affected by insemination. More macrophages were located in the superficial endometrial stroma at oestrus. These results indicate that spermatozoa, seminal plasma and possibly bacteria contribute to the postinsemination inflammatory response, and that leukocytes, GM-CSF and IL-8 secretion in the ovine uterus are influenced by ovarian hormones.

Item ID: 9977
Item Type: Article (Research - C1)
ISSN: 1448-5990
Date Deposited: 20 Apr 2010 01:43
FoR Codes: 07 AGRICULTURAL AND VETERINARY SCIENCES > 0702 Animal Production > 070206 Animal Reproduction @ 100%
SEO Codes: 83 ANIMAL PRODUCTION AND ANIMAL PRIMARY PRODUCTS > 8303 Livestock Raising > 830311 Sheep - Wool @ 100%
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