1
|
Yamamoto N, Takeuchi H, Yamaoka M, Nakanishi T, Tonai S, Nishimura R, Morita T, Nagano M, Kameda S, Genda K, Kawase J, Yamashita Y. Lipopolysaccharide (LPS) suppresses follicle development marker expression and enhances cytokine expressions, which results in fail to granulosa cell proliferation in developing follicle in cows. Reprod Biol 2023; 23:100710. [PMID: 36470010 DOI: 10.1016/j.repbio.2022.100710] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2022] [Revised: 10/18/2022] [Accepted: 11/10/2022] [Indexed: 12/12/2022]
Abstract
Postpartum endometritis is known to be associated with ovarian dysfunction in cows. Lipopolysaccharide (LPS) generated by Gram-negative bacteria is recognized by toll-like receptor 4 (TLR4), which leads to an inflammatory response by the generation of cytokines such as tumor necrosis factor-α (TNF-α) and interleukins. In this study, we investigated the effect of endometrial LPS on granulosa cell functions during early follicular development in cows. Uteri and follicles were obtained from a slaughterhouse and classified into either clinical endometritis (CE) or normal groups by vaginal mucus test. TLR4 mRNA and protein in normal cows were expressed in granulosa cells collected from follicles measuring 1-3 and 4-7 mm in a diameter, respectively. LPS content in endometrium and follicular fluid of CE cows was significantly higher than that in normal cows. Compared to normal cows, CE cows showed lower expression of follicular development markers (FSHR, CYP19A1, CCND2, and LHCGR) in granulosa cells, lower estradiol-17β concentrations in follicular fluid, and lower granulosa cell proliferation. CE contraction significantly increased cytokine expressions (TNF, IL-1A, and IL-1B) in granulosa cells and suppressed apoptosis of granulosa cells compared to normal cows. LPS significantly suppressed the expression of follicular development markers and the production of estradiol-17β in granulosa cells and reduced granulosa cells proliferation compared to cells cultured without LPS. LPS significantly increased cytokine expressions and suppressed granulosa cell apoptosis. Thus, the present results suggest that the existence of LPS in developing follicles is one of the causes of ovarian quiescence in cows.
Collapse
Affiliation(s)
- Naoki Yamamoto
- Shimane Meat Sanitation Inspection Center, Shimane Prefecture, 1677-2 Asahiyama-cho Senyama, Ooda 699-2212, Japan
| | - Himeno Takeuchi
- Laboratory of Animal Reproductive Physiology, Department of Bioresource Sciences, Prefectural University of Hiroshima, 5562 Nanatuka-cho, Shobara 727-0023, Japan
| | - Manami Yamaoka
- Laboratory of Animal Reproductive Physiology, Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima, 5562 Nanatuka-cho, Shobara 727-0023, Japan
| | - Tomoya Nakanishi
- Laboratory of Animal Reproductive Physiology, Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima, 5562 Nanatuka-cho, Shobara 727-0023, Japan
| | - Shingo Tonai
- Laboratory of Animal Reproductive Physiology, Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima, 5562 Nanatuka-cho, Shobara 727-0023, Japan
| | - Ryo Nishimura
- Laboratory of Theriogenology, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan
| | - Takehito Morita
- Laboratory of Veterinary Pathology, Joint Department of Veterinary Medicine, Faculty of Agriculture, Tottori University, 4-101 Koyama-cho Minami, Tottori 680-8553, Japan
| | - Masashi Nagano
- Laboratory of Animal Reproduction, Department of Animal Science, School of Veterinary Medicine, Kitasato University, Towada 034-8628, Japan
| | - Shingo Kameda
- Shimane Meat Sanitation Inspection Center, Shimane Prefecture, 1677-2 Asahiyama-cho Senyama, Ooda 699-2212, Japan
| | - Kaori Genda
- Shimane Meat Sanitation Inspection Center, Shimane Prefecture, 1677-2 Asahiyama-cho Senyama, Ooda 699-2212, Japan
| | - Jun Kawase
- Shimane Prefectural Institute of Public Health and Environment Science, 582-1 Nishihamasada-cho, Matsue, Shimane 690-0122, Japan
| | - Yasuhisa Yamashita
- Laboratory of Animal Reproductive Physiology, Department of Bioresource Sciences, Prefectural University of Hiroshima, 5562 Nanatuka-cho, Shobara 727-0023, Japan; Laboratory of Animal Reproductive Physiology, Graduate School of Comprehensive Scientific Research, Prefectural University of Hiroshima, 5562 Nanatuka-cho, Shobara 727-0023, Japan.
| |
Collapse
|