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Qin X, Du J, He R, Li Y, Li H, Liang X. Potential mechanisms and therapeutic strategies for LPS-associated female fertility decline. J Assist Reprod Genet 2024:10.1007/s10815-024-03226-2. [PMID: 39167249 DOI: 10.1007/s10815-024-03226-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2024] [Accepted: 08/07/2024] [Indexed: 08/23/2024] Open
Abstract
As a major component of the outer membrane of Gram-negative bacteria, lipopolysaccharide (LPS) can be recognized by toll-like receptors (TLRs) and induce inflammation through MyD88 or the TIR domain-containing adapter-inducing interferon-β (TRIF) pathway. Previous studies have found that LPS-associated inflammatory/immune challenges were associated with ovarian dysfunction and reduced female fertility. However, the etiology and pathogenesis of female fertility decline associated with LPS are currently complex and multifaceted. In this review, PubMed was used to search for references on LPS and fertility decline so as to elucidate the potential mechanisms of LPS-associated female fertility decline and summarize therapeutic strategies that may improve LPS-associated fertility decline.
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Affiliation(s)
- Xue Qin
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China
| | - Junhong Du
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China
| | - Ruifen He
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China
| | - Yaxi Li
- The First Clinical Medical College of Lanzhou University, Lanzhou, Gansu, China
| | - Hongli Li
- Department of Obstetrics and Gynecology, Key Laboratory for Gynecologic Oncology Gansu Province, The First Hospital of Lanzhou University, No.1, Donggangxi Rd, Chengguan District, Lanzhou, 730000, China
| | - Xiaolei Liang
- Department of Obstetrics and Gynecology, Key Laboratory for Gynecologic Oncology Gansu Province, The First Hospital of Lanzhou University, No.1, Donggangxi Rd, Chengguan District, Lanzhou, 730000, China.
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Castro B, Candelaria JI, Austin MM, Shuster CB, Gifford CA, Denicol AC, Hernandez Gifford JA. Low-dose lipopolysaccharide exposure during oocyte maturation disrupts early bovine embryonic development. Theriogenology 2024; 214:57-65. [PMID: 37857151 PMCID: PMC10841481 DOI: 10.1016/j.theriogenology.2023.10.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Revised: 10/09/2023] [Accepted: 10/10/2023] [Indexed: 10/21/2023]
Abstract
Gram-negative bacteria release of lipopolysaccharide (LPS) endotoxin elicits robust immune responses capable of disrupting normal ovarian function contributing to female infertility. However, effects of subclinical or non-detectable infections on oocyte competence and subsequent embryo development remain to be fully elucidated. The aim of this study was to investigate the effects of exposing bovine oocytes to low LPS doses on oocyte and embryo competence. Bovine oocytes were collected from slaughterhouse-derived ovaries and matured with vehicle-control or increasing doses of LPS (0.01, 0.1, and 1 μg/mL) for 21 h. Oocytes (n = 252) were evaluated for nuclear maturation. A set of embryos from LPS-matured oocytes (n = 300) were cultured for 8 d to evaluate day 3 cleavage rates and day 8 blastocyst rates along with blastocyst cell counts. A subset of oocytes (n = 153) was fertilized and cultured for time-lapse image capture and analysis of embryo development. Results demonstrate no significant treatment differences among treatment groups in percent of oocytes at germinal vesicle (GV; P = 0.90), germinal vesicle breakdown (GVBD; P = 0.13), meiosis I (MI; P = 0.26), or metaphase II (MII; P = 0.44). Likewise, treatment differences were not observed in cleavage rates (P = 0.97), or blastocyst rates (P = 0.88) evaluated via traditional microscopy. Treatment with LPS did not affect total blastocyst cell count (P = 0.68), as indicated by trophectoderm (P = 0.83), and inner cell mass (P = 0.21) cell counts. Time-lapse embryo evaluation demonstrated no differences among control or LPS matured oocytes in number of zygotes that did not cleave after fertilization (P = 0.84), or those that cleaved but arrested at the 2-cell stage (P = 0.50), 4-cell (P = 0.76), prior to morula (P = 0.76). However, embryos derived from oocytes challenged with 0.1 μg/mL LPS tended to have reduced development to the morula stage compared with vehicle-treated controls (P = 0.06). Additionally, the percentage of blastocysts derived from oocytes matured in 0.01 μg/mL LPS tended to decrease compared to vehicle-treated controls (11.38 and 25.45 %, respectively; P = 0.09). Similarly, the proportion of oocytes that developed to the blastocyst stage was greater in vehicle-treated controls (25.45 %) compared with embryos derived from oocytes matured in 0.1 and 1 μg/mL (5.92 and 6.55 %, respectively; P = 0.03) LPS. These data suggest LPS-matured oocytes that subsequently underwent in vitro fertilization, experienced decreased competence to develop to the blastocyst stage.
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Affiliation(s)
- B Castro
- Department of Animal and Range Sciences, New Mexico State University, Las Cruces, NM, 88003, USA
| | - J I Candelaria
- Department of Animal Science, University of California, Davis, CA, 95616, USA
| | - M M Austin
- Department of Animal and Range Sciences, New Mexico State University, Las Cruces, NM, 88003, USA
| | - C B Shuster
- Department of Biology, New Mexico State University, Las Cruces, NM, 88003, USA
| | - C A Gifford
- Extension Animal Sciences and Natural Resources, New Mexico State University, Las Cruces, NM, 88003, USA
| | - A C Denicol
- Department of Animal Science, University of California, Davis, CA, 95616, USA
| | - J A Hernandez Gifford
- Department of Animal and Range Sciences, New Mexico State University, Las Cruces, NM, 88003, USA.
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Yang R, Zhang S, Duan C, Guo Y, Shan X, Zhang X, Yue S, Zhang Y, Liu Y. Effect of prolactin on cytotoxicity and oxidative stress in ovine ovarian granulosa cells. PeerJ 2023; 11:e15629. [PMID: 37456891 PMCID: PMC10340108 DOI: 10.7717/peerj.15629] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/08/2023] [Accepted: 06/02/2023] [Indexed: 07/18/2023] Open
Abstract
Background Prolactin (PRL) has been reported to be associated with oxidative stress, which is an important contributor leading to cell apoptosis. However, little is known about the mechanisms underlying the effects of PRL on cytotoxicity and oxidative stress in ovine ovarian granulosa cells (GCs). Methods Ovine ovarian GCs were treated with 0, 4, 20, 100 and 500 ng/mL of PRL. Then, the cytotoxicity, cell viability, malondialdehyde (MDA), reactive oxygen species (ROS), superoxide dismutase (SOD) and total antioxidant capacity (T-AOC) of GCs were detected. Additionally, 500 ng/mL PRL was chosen as the high PRL concentration (HPC) due to its high cytotoxicity and oxidative stress. Proteomic and metabonomic were performed to examine the overall difference in proteins and metabolic pathways between C (control: 0 ng/mL PRL) and P groups (500 ng/mL PRL). Results The results indicated that GCs treated with 4 ng/mL PRL significantly decreased (P < 0.05) the cytotoxicity, ROS and MDA, increased (P < 0.05) the cell viability, SOD and T-AOC, and the GCs treated with 500 ng/mL PRL showed the opposite trend (P < 0.05). Supplementation with 500 ng/mL PRL significantly increased the proteins of MT-ND1, MAPK12, UBA52 and BCL2L1, which were enriched in ROS and mitophagy pathways. Pathway enrichment analysis showed that the pentose phosphate pathway was significantly enriched in the P group. Conclusion A low concentration of PRL inhibited cytotoxicity and oxidative stress. HPC induced oxidative stress in ovine ovarian GCs via the pentose phosphate pathway by modulating the associated proteins MT-ND1 in ROS pathway and UBA52, MAPK12 and BCL2L1 in mitophagy pathway, resulting in cytotoxicity.
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Affiliation(s)
| | - Shuo Zhang
- China Agricultural University, Beijing, China
| | | | - Yunxia Guo
- Hebei Agricultural University, Baoding, China
| | - Xinyu Shan
- Hebei Agricultural University, Baoding, China
| | | | - Sicong Yue
- Hebei Agricultural University, Baoding, China
| | | | - Yueqin Liu
- Hebei Agricultural University, Baoding, China
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Yang R, Duan C, Zhang S, Liu Y, Zhang Y. Prolactin Regulates Ovine Ovarian Granulosa Cell Apoptosis by Affecting the Expression of MAPK12 Gene. Int J Mol Sci 2023; 24:10269. [PMID: 37373417 DOI: 10.3390/ijms241210269] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Revised: 06/14/2023] [Accepted: 06/15/2023] [Indexed: 06/29/2023] Open
Abstract
Prolactin (PRL) has been reported to influence reproductive performance and cell apoptosis. However, its mechanism remains unclear. Hence, in the present study, ovine ovarian granulosa cells (GCs) were used as a cell model to investigate the relationship between PRL concentration and GC apoptosis, as well as its possible mechanisms. We examined the relationship between serum PRL concentration and follicle counts in sexually mature ewes. GCs were isolated from adult ewes and treated with different concentrations of PRL, while 500 ng/mL PRL was selected as the high concentration of prolactin (HPC). Then, we applied the transcriptome sequencing (RNA-Seq) combined with a gene editing approach to explore the HPC contributing to cell apoptosis and steroid hormones. The apoptosis of GCs gradually increased at PRL concentrations above 20 ng/mL, while 500 ng/mL PRL significantly decreased the secretion of steroid hormones and the expression of L-PRLR and S-PRLR. The results indicated that PRL regulates GC development and steroid hormones mainly through the target gene MAPK12. The expression of MAPK12 was increased after knocked-down L-PRLR and S-PRLR, while it decreased after overexpressed L-PRLR and S-PRLR. Cell apoptosis was inhibited and the secretion of steroid hormones increased after interfering with MAPK12, while the overexpression of MAPK12 showed the opposite trend. Overall, the number of follicles gradually decreased with increasing PRL concentration. HPCs promoted apoptosis and inhibited steroid hormone secretion in GCs by upregulating MAPK12 through reducing L-PRLR and S-PRLR.
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Affiliation(s)
- Ruochen Yang
- College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China
| | - Chunhui Duan
- College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China
| | - Shuo Zhang
- College of Animal Science and Technology, China Agricultural University, Beijing 100089, China
| | - Yueqin Liu
- College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China
| | - Yingjie Zhang
- College of Animal Science and Technology, Hebei Agricultural University, Baoding 071000, China
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Liu W, Du C, Nan L, Li C, Wang H, Fan Y, Zhou A, Zhang S. Influence of Estrus on Dairy Cow Milk Exosomal miRNAs and Their Role in Hormone Secretion by Granulosa Cells. Int J Mol Sci 2023; 24:ijms24119608. [PMID: 37298559 DOI: 10.3390/ijms24119608] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/04/2023] [Revised: 05/19/2023] [Accepted: 05/29/2023] [Indexed: 06/12/2023] Open
Abstract
Estrus is crucial for cow fertility in modern dairy farms, but almost 50% of cows do not show the behavioral signs of estrus due to silent estrus and lack of suitable and high-accuracy methods to detect estrus. MiRNA and exosomes play essential roles in reproductive function and may be developed as novel biomarkers in estrus detection. Thus, we analyzed the miRNA expression patterns in milk exosomes during estrus and the effect of milk exosomes on hormone secretion in cultured bovine granulosa cells in vitro. We found that the number of exosomes and the exosome protein concentration in estrous cow milk were significantly lower than in non-estrous cow milk. Moreover, 133 differentially expressed exosomal miRNAs were identified in estrous cow milk vs. non-estrous cow milk. Functional enrichment analyses indicated that exosomal miRNAs were involved in reproduction and hormone-synthesis-related pathways, such as cholesterol metabolism, FoxO signaling pathway, Hippo signaling pathway, mTOR signaling pathway, steroid hormone biosynthesis, Wnt signaling pathway and GnRH signaling pathway. Consistent with the enrichment signaling pathways, exosomes derived from estrous and non-estrous cow milk both could promote the secretion of estradiol and progesterone in cultured bovine granulosa cells. Furthermore, genes related to hormonal synthesis (CYP19A1, CYP11A1, HSD3B1 and RUNX2) were up-regulated after exosome treatment, while exosomes inhibited the expression of StAR. Moreover, estrous and non-estrous cow-milk-derived exosomes both could increase the expression of bcl2 and decrease the expression of p53, and did not influence the expression of caspase-3. To our knowledge, this is the first study to investigate exosomal miRNA expression patterns during dairy cow estrus and the role of exosomes in hormone secretion by bovine granulosa cells. Our findings provide a theoretical basis for further investigating milk-derived exosomes and exosomal miRNA effects on ovary function and reproduction. Moreover, bovine milk exosomes may have effects on the ovaries of human consumers of pasteurized cow milk. These differential miRNAs might provide candidate biomarkers for the diagnosis of dairy cow estrus and will assist in developing new therapeutic targets for cow infertility.
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Affiliation(s)
- Wenju Liu
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
- College of Life and Health Science, Anhui Science and Technology University, Fengyang 233100, China
| | - Chao Du
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Liangkang Nan
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Chunfang Li
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Haitong Wang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Yikai Fan
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
| | - Ao Zhou
- Laboratory of Genetic Breeding, Reproduction and Precision Livestock Farming, School of Animal Science and Nutritional Engineering, Wuhan Polytechnic University, Wuhan 430023, China
| | - Shujun Zhang
- Key Laboratory of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agricultural University, Wuhan 430070, China
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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.
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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.
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7
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Female reproduction and the microbiota in mammals: Where are we? Theriogenology 2022; 194:144-153. [DOI: 10.1016/j.theriogenology.2022.10.007] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/25/2022] [Revised: 09/20/2022] [Accepted: 10/04/2022] [Indexed: 11/07/2022]
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Magata F, Toda L, Sato M, Sakono T, Chambers JK, Uchida K, Tsukamura H, Matsuda F. Intrauterine LPS inhibited arcuate Kiss1 expression, LH pulses, and ovarian function in rats. Reproduction 2022; 164:207-219. [PMID: 36099331 DOI: 10.1530/rep-22-0047] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2022] [Accepted: 09/12/2022] [Indexed: 11/08/2022]
Abstract
In brief Uterine inflammatory diseases are a major cause of infertility in humans and domestic animals. The current findings that intrauterine lipopolysaccharide is absorbed in systemic circulation and attenuates ovarian cyclic activities could provide a basis for developing novel treatments to improve fertility. Abstract Uterine inflammatory diseases are a major cause of infertility in humans and domestic animals. Circulating lipopolysaccharide (LPS), a bacterial endotoxin causing uterine inflammation, reportedly downregulates the hypothalamic-pituitary-gonadal axis to mediate ovarian dysfunction. In contrast, the mechanism whereby intrauterine LPS affects ovarian function has not been fully clarified. This study aimed to elucidate whether uterine exposure to LPS downregulates hypothalamic kisspeptin gene (Kiss1) expression, gonadotropin release, and ovarian function. Uterine inflammation was induced by intrauterine LPS administration to ovary-intact and ovariectomized female rats. As a result, plasma LPS concentrations were substantially higher in control rats until 48 h post injection, and the estrous cyclicity was disrupted with a prolonged diestrous phase. Three days post injection, the number of Graafian follicles and plasma estradiol concentration were reduced in LPS-treated rats, while numbers of Kiss1-expressing cells in the anteroventral periventricular nucleus and arcuate nucleus (ARC) were comparable in ovary-intact rats. Four days post injection, ovulation rate and plasma progesterone levels reduced significantly while gene expression of interleukin1β and tumor necrosis factor α was upregulated in the ovaries of LPS-treated rats that failed to ovulate. Furthermore, the number of Kiss1-expressing cells in the ARC and pulsatile luteinizing hormone (LH) release were significantly reduced in ovariectomized rats 24 h post injection. In conclusion, these results indicate that intrauterine LPS is absorbed in systemic circulation and attenuates ovarian function. This detrimental effect might be caused, at least partly, by the inhibition of ARC Kiss1 expression and LH pulses along with an induction of ovarian inflammatory response.
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Affiliation(s)
- Fumie Magata
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - Lisa Toda
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - Marimo Sato
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - Takahiro Sakono
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - James K Chambers
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - Kazuyuki Uchida
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
| | - Hiroko Tsukamura
- Graduate School of Bioagricultural Sciences, Nagoya University, Nagoya, Japan
| | - Fuko Matsuda
- Department of Veterinary Medical Sciences, The University of Tokyo, Tokyo, Japan
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Li Q, Zhang Y, Li W, Yan K, Liu Y, Xu H, Lu Y, Liang X, Yang X. Allicin protects porcine oocytes against LPS-induced defects during maturation in vitro. Theriogenology 2022; 182:138-147. [DOI: 10.1016/j.theriogenology.2022.02.007] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/06/2021] [Revised: 02/05/2022] [Accepted: 02/07/2022] [Indexed: 12/15/2022]
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Younesi S, Spencer SJ, Sominsky L. Monocyte perturbation modulates the ovarian response to an immune challenge. Mol Cell Endocrinol 2021; 536:111418. [PMID: 34339824 DOI: 10.1016/j.mce.2021.111418] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/03/2021] [Revised: 07/27/2021] [Accepted: 07/29/2021] [Indexed: 11/20/2022]
Abstract
Our recent findings indicate that an acute depletion of monocytes has no sustained effects on ovarian follicle health. Here, we utilised a Cx3cr1-Dtr transgenic Wistar rat model to transiently deplete monocytes and investigated the impact of an acute immune challenge by lipopolysaccharide (LPS) on ovarian follicle health and ovulatory capacity relative to wt once the monocytes had repopulated. Monocyte depletion and repopulation exacerbated the effects of LPS in several domains. As such, monocyte perturbation decreased the numbers of secondary follicles in those challenged with LPS. Monocyte perturbation was also associated with reduced antral follicle numbers and circulating luteinising hormone (LH) levels, as well as potential changes in ovarian sensitivity to LH, exacerbated by LPS. These data suggest that monocyte depletion and repopulation induce a transient suppression of ovulatory capacity in response to a subsequent immune challenge, but this is likely to be restored once the pro-inflammatory environment is resolved.
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Affiliation(s)
- Simin Younesi
- School of Health and Biomedical Sciences RMIT University, Melbourne, VIC, Australia
| | - Sarah J Spencer
- School of Health and Biomedical Sciences RMIT University, Melbourne, VIC, Australia; ARC Centre of Excellence for Nanoscale Biophotonics, RMIT University, Melbourne, VIC, Australia
| | - Luba Sominsky
- School of Health and Biomedical Sciences RMIT University, Melbourne, VIC, Australia; Barwon Health Laboratory, Barwon Health University Hospital, Geelong, VIC, Australia; Institute for Physical and Mental Health and Clinical Transformation, School of Medicine, Faculty of Health, Deakin University, Australia.
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Hou J, Lei Z, Cui L, Hou Y, Yang L, An R, Wang Q, Li S, Zhang H, Zhang L. Polystyrene microplastics lead to pyroptosis and apoptosis of ovarian granulosa cells via NLRP3/Caspase-1 signaling pathway in rats. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2021; 212:112012. [PMID: 33550074 DOI: 10.1016/j.ecoenv.2021.112012] [Citation(s) in RCA: 146] [Impact Index Per Article: 48.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/17/2020] [Revised: 01/17/2021] [Accepted: 01/28/2021] [Indexed: 05/23/2023]
Abstract
Microplastics (MPs) considered as a new persistent environmental pollutant could enter into the circulatory system and result in decrease of sperm quantity and quality in mice. However, the effects of Polystyrene MPs (PS MPs) on the ovary and its mechanism in rats remained unclear. In this present study, thirty-two healthy female Wistar rats were exposed to different concentrations of 0.5 µm PS MPs dispersed in deionized water for 90 days. Using hematoxylin-eosin (HE) staining, the number of growing follicles was decreased compared to the control group. In addition, the activity of glutathione peroxidase (GSH-Px), catalase (CAT) and superoxide dismutase (SOD) were decreased while the expression level of malondialdehyde (MDA) was increased in ovary tissue. Confirmed by immunohistochemistry, the integrated optical density of NLRP3 and Cleaved-Caspase-1 had been elevated by 13.9 and 14 in granulosa cells in the 1.5 mg/kg/d group. Furthermore, compared to the control group, the level of AMH had been decreased by 23.3 pg/ml while IL-1β and IL-18 had been increased by 32 and 18.5 pg/ml in the 1.5 mg/kg/d group using the enzyme-linked immune sorbent assay (ELISA). Besides, the apoptosis of granulosa cells was elevated measured by terminal deoxyribonucleotide transferase-mediated nick end labeling (TUNEL) staining and flow cytometry. Moreover, western blot assays showed that the expressions of NLRP3/Caspase-1 signaling pathway related factors and Cleaved-Caspase-3 were increased. These results demonstrated that PS MPs could induce pyroptosis and apoptosis of ovarian granulosa cells via the NLRP3/Caspase-1 signaling pathway maybe triggered by oxidative stress. The present study suggested that exposure to microplastics had adverse effects on ovary and could be a potential risk factor for female infertility, which provided new insights into the toxicity of MPs on female reproduction.
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Affiliation(s)
- Junyu Hou
- College of Clinical Medicine, Bin Zhou Medical University, Yantai, PR China
| | - Zhimin Lei
- College of Clinical Medicine, Bin Zhou Medical University, Yantai, PR China
| | - Linlu Cui
- Department of Histology and Embryology, Bin Zhou Medical University, Yantai, PR China; College of Basic Medicine & Xu Rongxiang Regenerative Medicine Research Center, Binzhou Medical University, Yantai, PR China
| | - Yun Hou
- Department of Histology and Embryology, Bin Zhou Medical University, Yantai, PR China; College of Basic Medicine & Xu Rongxiang Regenerative Medicine Research Center, Binzhou Medical University, Yantai, PR China
| | - Long Yang
- College of Clinical Medicine, Bin Zhou Medical University, Yantai, PR China
| | - Ru An
- College of Clinical Medicine, Bin Zhou Medical University, Yantai, PR China
| | - Qimeng Wang
- College of Clinical Medicine, Bin Zhou Medical University, Yantai, PR China
| | - Shengda Li
- College of Clinical Medicine, Bin Zhou Medical University, Yantai, PR China
| | - Hongqin Zhang
- Department of Histology and Embryology, Bin Zhou Medical University, Yantai, PR China; College of Basic Medicine & Xu Rongxiang Regenerative Medicine Research Center, Binzhou Medical University, Yantai, PR China
| | - Lianshuang Zhang
- Department of Histology and Embryology, Bin Zhou Medical University, Yantai, PR China; College of Basic Medicine & Xu Rongxiang Regenerative Medicine Research Center, Binzhou Medical University, Yantai, PR China.
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Rasekhi M, Mohammadi-Sangcheshmeh A, Daliri M, Bakhtiarizadeh M, Shariati V, Rahimi M, Hajarizadeh A, Nazari SA, Ross PJ, Tvrdá E. Transcriptional profile of ovine oocytes matured under lipopolysaccharide treatment in vitro. Theriogenology 2020; 157:70-78. [PMID: 32805644 DOI: 10.1016/j.theriogenology.2020.07.034] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/01/2020] [Revised: 07/24/2020] [Accepted: 07/30/2020] [Indexed: 12/13/2022]
Abstract
Lipopolysaccharide (LPS) derived from gram negative bacteria cell wall is known to cause ruminal acidosis and/or infectious diseases such as metritis and mastitis which has a significant negative impact on the reproductive performance. This study aimed to investigate the effect of LPS on oocyte maturation and subsequent development in vitro. Ovine cumulus oocyte complexes (COCs) were matured in a medium supplemented with 0 (control), 0.01, 0.1, 1 and 10 μg/mL LPS. Nuclear maturation, cleavage and blastocyst rate, mitochondrial membrane potential (ΔΨm), intracellular reactive oxygen species (ROS) content and changes to the transcript abundance were evaluated. In case of the maturation rate, the percentage of oocytes reaching the MII stage was lower following exposure to 10 μg/mL LPS in comparison to the control group (P < 0.05). Moreover, the blastocyst rate decreased in case of 1 and 10 μg/mL LPS when compared to the control group (P < 0.05). ROS overproduction accompanied by a decreased ΔΨm were recorded in LPS treated oocytes in comparison to the control group (P < 0.05). The 3' tag digital gene expression profiling method revealed that 7887 genes were expressed while only seven genes exhibited changes in the transcript abundance following exposure to LPS. Tripartite motif containing 25 (TRIM25), Tripartite motif containing 26 (TRIM26), Zona Pellucida glycoprotein 3 (ZP3), Family with sequence similarity 50-member A (FAM50A), Glyoxalate and hydroxy pyruvate reductase (GRHPR), NADH ubiquinase oxireductase subunit A8 (NDUFA8) were down-regulated (P < 0.05), while only Centrin 3 (CETN3) was up-regulated (P < 0.05). Our findings show that LPS has undesirable effects on the maturation competence of ovine oocytes and subsequent embryo development. In addition, the transcriptomic profiling results may shed more light on the molecular mechanisms of LPS-induced infertility in ruminants.
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Affiliation(s)
- Mahsa Rasekhi
- National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | | | - Morteza Daliri
- National Institute of Genetic Engineering and Biotechnology, Tehran, Iran.
| | - Mohammadreza Bakhtiarizadeh
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Pakdasht, Tehran, Iran
| | - Vahid Shariati
- National Institute of Genetic Engineering and Biotechnology, Tehran, Iran
| | - Maryam Rahimi
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Pakdasht, Tehran, Iran
| | - Atieh Hajarizadeh
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Pakdasht, Tehran, Iran
| | - Sara Ataei Nazari
- Department of Animal and Poultry Science, College of Aburaihan, University of Tehran, Pakdasht, Tehran, Iran
| | - Pablo J Ross
- Department of Animal Science, UC Davis, California, USA
| | - Eva Tvrdá
- Department of Animal Physiology, Faculty of Biotechnology and Food Sciences, Slovak University of Agriculture in Nitra, Nitra, Slovakia
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Wang X, Li C, Wang Y, Li L, Han Z, Wang G. UFL1 Alleviates LPS-Induced Apoptosis by Regulating the NF-κB Signaling Pathway in Bovine Ovarian Granulosa Cells. Biomolecules 2020; 10:biom10020260. [PMID: 32050508 PMCID: PMC7072671 DOI: 10.3390/biom10020260] [Citation(s) in RCA: 21] [Impact Index Per Article: 5.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/31/2019] [Revised: 01/26/2020] [Accepted: 02/06/2020] [Indexed: 12/20/2022] Open
Abstract
Ubiquitin-like modifier 1 ligating enzyme 1 (UFL1) is an E3 ligase of ubiquitin fold modifier 1 (UFM1), which can act together with its target protein to inhibit the apoptosis of cells. Lipopolysaccharides (LPS) can affect the ovarian health of female animals by affecting the apoptosis of ovarian granulosa cells. The physiological function of UFL1 on the apoptosis of bovine (ovarian) granulosa cells (bGCs) remains unclear; therefore, we focused on the modulating effect of UFL1 on the regulation of LPS-induced apoptosis in ovarian granulosa cells. Our study found that UFL1 was expressed in both the nucleus and cytoplasm of bGCs. The results here demonstrated that LPS caused a significant increase in the apoptosis level of bGCs in cows, and also dramatically increased the expression of UFL1. Furthermore, we found that UFL1 depletion caused a significant increase in apoptosis (increased the expression of BAX/BCL-2 and the activity of caspase-3). Conversely, the overexpression of UFL1 relieved the LPS-induced apoptosis. In order to assess whether the inhibition of bGCs apoptosis involved in the nuclear factor-κB (NF-κB) signaling pathway resulted from UFL1, we detected the expression of NF-κB p-p65. LPS treatment resulted in a significant upregulation in the protein concentration of NF-κB p-p65, and knockdown of UFL1 further increased the phosphorylation of NF-κB p65, while UFL1 overexpression significantly inhibited the expression of NF-κB p-p65. Collectively, UFL1 could suppress LPS-induced apoptosis in cow ovarian granulosa cells, likely via the NF-κB pathway. These results identify a novel role of UFL1 in the modulation of bGC apoptosis, which may be a potential signaling target to improve the reproductive health of dairy cows.
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Affiliation(s)
| | | | | | - Lian Li
- Correspondence: ; Tel.: +86-25-84395045; Fax: +86-25-84395314
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14
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Seibert JT, Adur MK, Schultz RB, Thomas PQ, Kiefer ZE, Keating AF, Baumgard LH, Ross JW. Differentiating between the effects of heat stress and lipopolysaccharide on the porcine ovarian heat shock protein response1. J Anim Sci 2019; 97:4965-4973. [PMID: 31782954 PMCID: PMC6915215 DOI: 10.1093/jas/skz343] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/30/2019] [Accepted: 11/27/2019] [Indexed: 11/14/2022] Open
Abstract
Heat stress (HS) negatively affects both human and farm-animal health and undermines efficiency in a variety of economically important agricultural variables, including reproduction. HS impairs the intestinal barrier, allowing for translocation of the resident microflora and endotoxins, such as lipopolysaccharide (LPS), from the gastrointestinal lumen into systemic circulation. While much is known about the cellular function of heat shock proteins (HSPs) in most tissues, the in vivo ovarian HSP response to stressful stimuli remains ill-defined. The purpose of this study was to compare the effects of HS or LPS on ovarian HSP expression in pigs. We hypothesized that ovarian HSPs are responsive to both HS and LPS. Altrenogest (15 mg/d) was administered per os for estrus synchronization (14 d) prior to treatment and three animal paradigms were used: (i) gilts were exposed to cyclical HS (31 ± 1.4 °C) or thermoneutral (TN; 20 ± 0.5 °C) conditions immediately following altrenogest withdrawal for 5 d during follicular development; (ii) gilts were subjected to repeated (4×/d) saline (CON) or LPS (0.1 μg/kg BW) i.v. infusion immediately following altrenogest withdrawal for 5 d; and (iii) gilts were subjected to TN (20 ± 1 °C) or cyclical HS (31 to 35 °C) conditions 2 d post estrus (dpe) until 12 dpe during the luteal phase. While no differences were detected for transcript abundances of the assessed ovarian HSP, the protein abundance of specific HSP was influenced by stressors during the follicular and luteal phases. HS during the follicular phase tended (P < 0.1) to increase ovarian protein abundance of HSP90AA1 and HSPA1A, and increased (P ≤ 0.05) HSF1, HSPD1, and HSPB1 compared with TN controls, while HS decreased HSP90AB1 (P = 0.01). Exposure to LPS increased (P < 0.05) HSP90AA1 and HSPA1A and tended (P < 0.1) to increase HSF1 and HSPB1 compared with CON gilts, while HSP90AB1 and HSPD1 were not affected by LPS. HS during the luteal phase increased (P < 0.05) abundance of HSPB1 in corpora lutea (CL), decreased (P < 0.05) CL HSP90AB1, but did not impact HSF1, HSPD1, HSP90AA1, or HSPA1A abundance. Thus, these data support that HS and LPS similarly regulate expression of specific ovarian HSP, which suggest that HS effects on the ovary are in part mediated by LPS.
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Affiliation(s)
- Jacob T Seibert
- Department of Animal Science, Iowa State University, Ames, IA
| | - Malavika K Adur
- Department of Animal Science, Iowa State University, Ames, IA
| | | | - Porsha Q Thomas
- Department of Animal Science, Iowa State University, Ames, IA
| | - Zoe E Kiefer
- Department of Animal Science, Iowa State University, Ames, IA
| | | | | | - Jason W Ross
- Department of Animal Science, Iowa State University, Ames, IA
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15
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Fuller EA, Sominsky L, Sutherland JM, Redgrove KA, Harms L, McLaughlin EA, Hodgson DM. Neonatal immune activation depletes the ovarian follicle reserve and alters ovarian acute inflammatory mediators in neonatal rats. Biol Reprod 2018; 97:719-730. [PMID: 29040417 DOI: 10.1093/biolre/iox123] [Citation(s) in RCA: 23] [Impact Index Per Article: 3.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/10/2017] [Accepted: 10/07/2017] [Indexed: 12/30/2022] Open
Abstract
Normal ovarian development is crucial for female reproductive success and longevity. Interruptions to the delicate process of initial folliculogenesis may lead to ovarian dysfunction. We have previously demonstrated that an early life immune challenge in the rat, induced by administration of lipopolysaccharide (LPS) on postnatal day (PND) 3 and 5, depletes ovarian follicle reserve long term. Here, we hypothesized that this neonatal immune challenge leads to an increase in peripheral and ovarian inflammatory signaling, contributing to an acute depletion of ovarian follicles. Morphological analysis of neonatal ovaries indicated that LPS administration significantly depleted PND 5 primordial follicle populations and accelerated follicle maturation. LPS exposure upregulated circulating interleukin 6, tumor necrosis factor alpha (TNFa), and C-reactive protein on PND 5, and upregulated ovarian mRNA expression of Tnfa, mitogen-activated protein kinase 8 (Mapk8/Jnk1), and growth differentiation factor 9 (Gdf9) (P < 0.05). Mass spectrometry and cell signaling pathway analysis indicated upregulation of cellular pathways associated with acute phase signaling, and cellular survival and assembly. Apoptosis assessed by terminal deoxynucleotidyl transferase dUTP nick end labeling indicated significantly increased positive staining in the ovaries of LPS-treated neonates. These findings suggest that increased proinflammatory signaling within the neonatal ovary may be responsible for the LPS-induced depletion of the primordial follicle pool. These findings also have implications for female reproductive health, as the ovarian reserve is a major determinate of female reproductive longevity.
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Affiliation(s)
- Erin A Fuller
- Laboratory of Neuroimmunology, Priority Research Centre for Brain and Mental Health Research, School of Psychology, University of Newcastle, Callaghan, New South Wales, Australia
| | - Luba Sominsky
- School of Health and Biomedical Sciences, Royal Melbourne Institute of Technology University, Melbourne, Victoria, Australia
| | - Jessie M Sutherland
- School of Environmental and Life Sciences, Priority Research Centre in Chemical Biology, University of Newcastle, Callaghan, New South Wales, Australia
| | - Kate A Redgrove
- School of Environmental and Life Sciences, Priority Research Centre in Chemical Biology, University of Newcastle, Callaghan, New South Wales, Australia
| | - Lauren Harms
- Laboratory of Neuroimmunology, Priority Research Centre for Brain and Mental Health Research, School of Psychology, University of Newcastle, Callaghan, New South Wales, Australia
| | - Eileen A McLaughlin
- School of Environmental and Life Sciences, Priority Research Centre in Chemical Biology, University of Newcastle, Callaghan, New South Wales, Australia.,School of Biological Sciences, University of Auckland, Auckland, New Zealand
| | - Deborah M Hodgson
- Laboratory of Neuroimmunology, Priority Research Centre for Brain and Mental Health Research, School of Psychology, University of Newcastle, Callaghan, New South Wales, Australia
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16
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Wang SJ, Liu WJ, Wang LK, Pang XS, Yang LG. The role of Melatonin receptor MTNR1A in the action of Melatonin on bovine granulosa cells. Mol Reprod Dev 2017; 84:1140-1154. [DOI: 10.1002/mrd.22877] [Citation(s) in RCA: 21] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2017] [Accepted: 08/04/2017] [Indexed: 12/12/2022]
Affiliation(s)
- Shu-Juan Wang
- Anhui Science and Technology University; Fengyang Anhui China
| | - Wen-Ju Liu
- Anhui Science and Technology University; Fengyang Anhui China
| | - Li-Ke Wang
- Anhui Science and Technology University; Fengyang Anhui China
| | - Xun-Sheng Pang
- Anhui Science and Technology University; Fengyang Anhui China
| | - Li-Guo Yang
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education; Huazhong Agriculture University; Wuhan Hubei China
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17
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Wang S, Liu B, Liu W, Xiao Y, Zhang H, Yang L. The effects of melatonin on bovine uniparental embryos development in vitro and the hormone secretion of COCs. PeerJ 2017; 5:e3485. [PMID: 28698819 PMCID: PMC5502088 DOI: 10.7717/peerj.3485] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2017] [Accepted: 05/31/2017] [Indexed: 12/23/2022] Open
Abstract
Melatonin is a unique multifunctional molecule that mediates reproductive functions in animals. In this study, we investigated the effects of melatonin on bovine parthenogenetic and androgenetic embryonic development, oocyte maturation, the reactive oxygen species (ROS) levels in parthenogenetic and androgenetic embryos and cumulus—oocyte complexes (COCs) hormone secretion with melatonin supplementation at four concentrations (0, 10, 20, and 30 pmol/mL), respectively. The results showed that melatonin significantly promoted the rates of bovine parthenogenetic and androgenetic embryonic cleavage and morula and blastocysts development (P < 0.05). The rate of cleavage was higher in the androgenetic embryo than that in the parthenogenetic embryo. Compared with the parthenogenetic embryos, the androgenetic embryos had a poor developmental competence from morula to blastocyst stage. Moreover, the levels of ROS were significantly lower in the parthenogenetic and androgenetic embryoes with melatonin-treated group than that of the control group (P < 0.05). Melatonin supplemented significantly increased the maturation rate of oocyte in vitro (P < 0.05). More importantly, melatonin significantly promoted the secretion of progesterone and estradiol by COCs (P < 0.05). To reveal the regulatory mechanism of melatonin on steroids synthesis, we found that steroidogenic genes (CYP11A1, CYP19A1 and StAR) were upregulated, suggesting that melatonin regulated estradiol and progesterone secretion through mediating the expression of steroidogenic genes (CYP11A1, CYP19A1 and StAR). In addition, MT1 and MT2 were identified in bovine early parthenogenetic and androgenetic embryos using western blot. It could be concluded that melatonin had beneficial effects on bovine oocyte in vitro maturation, COC hormone secretion, early development of subsequent parthenogenetic and androgenetic embryos. It is inferred that melatonin could be used to enhance the efficiency of in vitro developed embryos.
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Affiliation(s)
- Shujuan Wang
- College of Animal Science, Anhui Science and Technology University, Bengbu, Anhui, China.,Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - Baoru Liu
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - Wenju Liu
- College of Animal Science, Anhui Science and Technology University, Bengbu, Anhui, China
| | - Yao Xiao
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - Hualin Zhang
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
| | - Liguo Yang
- Key Lab of Agricultural Animal Genetics, Breeding and Reproduction of Ministry of Education, Huazhong Agriculture University, Wuhan, Hubei, China
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18
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Mazzoni G, Salleh SM, Freude K, Pedersen HS, Stroebech L, Callesen H, Hyttel P, Kadarmideen HN. Identification of potential biomarkers in donor cows for in vitro embryo production by granulosa cell transcriptomics. PLoS One 2017; 12:e0175464. [PMID: 28403200 PMCID: PMC5389837 DOI: 10.1371/journal.pone.0175464] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2016] [Accepted: 03/27/2017] [Indexed: 11/30/2022] Open
Abstract
The Ovum Pick Up-In vitro Production (OPU-IVP) of embryos is an advanced reproductive technology used in cattle production but the complex biological mechanisms behind IVP outcomes are not fully understood. In this study we sequenced RNA of granulosa cells collected from Holstein cows at oocyte aspiration prior to IVP, to identify candidate genes and biological mechanisms for favourable IVP-related traits in donor cows where IVP was performed separately for each animal. We identified 56 genes significantly associated with IVP scores (BL rate, kinetic and morphology). Among these, BEX2, HEY2, RGN, TNFAIP6 and TXNDC11 were negatively associated while Mx1 and STC1 were positively associated with all IVP scores. Functional analysis highlighted a wide range of biological mechanisms including apoptosis, cell development and proliferation and four key upstream regulators (COX2, IL1, PRL, TRIM24) involved in these mechanisms. We found a range of evidence that good IVP outcome is positively correlated with early follicular atresia. Furthermore we showed that high genetic index bulls can be used in breeding without reducing the IVP performances. These findings can contribute to the development of biomarkers from follicular fluid content and to improving Genomic Selection (GS) methods that utilize functional information in cattle breeding, allowing a widespread large scale application of GS-IVP.
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Affiliation(s)
- Gianluca Mazzoni
- Animal Breeding, Quantitative Genetics & Systems Biology (AQS) Group, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Suraya M. Salleh
- Animal Breeding, Quantitative Genetics & Systems Biology (AQS) Group, Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Kristine Freude
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | | | - Lotte Stroebech
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
- EmbryoTrans Biotech A/S, Haslev, Denmark
| | - Henrik Callesen
- Department of Animal Science, Aarhus University, Tjele, Denmark
| | - Poul Hyttel
- Department of Veterinary and Animal Sciences, Faculty of Health and Medical Sciences, University of Copenhagen, Frederiksberg C, Denmark
| | - Haja N. Kadarmideen
- Department of Bio and Health Informatics, Technical University of Denmark, Kongens Lyngby, Denmark
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19
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Yoo DK, Lee SH. Effect of Lipopolysaccharide (LPS) Exposure on the Reproductive Organs of Immature Female Rats. Dev Reprod 2016; 20:113-21. [PMID: 27660826 PMCID: PMC5027216 DOI: 10.12717/dr.2016.20.2.113] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023]
Abstract
Lipopolysaccharide (LPS), an endotoxin, elicits strong immune responses in mammals. Several lines of evidence demonstrate that LPS challenge profoundly affects female reproductive function. For example, LPS exposure affects steroidogenesis and folliculogenesis, resulting in delayed puberty onset. The present study was conducted to clarify the mechanism underlying the adverse effect of LPS on the delayed puberty in female rats. LPS was daily injected for 5 days (50 μg/kg, PND 25-29) to treated animals and the date at VO was evaluated through daily visual examination. At PND 39, animals were sacrificed, and the tissues were immediately removed and weighed. Among the reproductive organs, the weights of the ovaries and oviduct from LPS-treated animals were significantly lower than those of control animals. There were no changes in the weights of uterus and vagina between the LPS-treated and their control animals. Immunological challenge by LPS delayed VO. Multiple corpora lutea were found in the control ovaries, indicating ovulations were occurred. However, none of corpus luteum was present in the LPS-treated ovary. The transcription level of steroidogenic acute regulatory protein (StAR), CYP11A1, CYP17A1 and CYP19 were significantly increased by LPS treatment. On the other hand, the levels of 3β- HSD, 17β-HSD and LH receptor were not changed by LPS challenge. In conclusion, the present study demonstrated that the repeated LPS exposure during the prepubertal period could induce multiple alterations in the steroidogenic machinery in ovary, and in turn, delayed puberty onset. The prepubertal LPS challenge model used in our study is useful to understand the reciprocal regulation of immune (stress) - reproductive function in early life.
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Affiliation(s)
- Da Kyung Yoo
- Dept. of Life Science, Sangmyung University, Seoul 03016, Korea
| | - Sung-Ho Lee
- Dept. of Life Science, Sangmyung University, Seoul 03016, Korea
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20
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Sheldon IM, Owens SE, Turner ML. Innate immunity and the sensing of infection, damage and danger in the female genital tract. J Reprod Immunol 2016; 119:67-73. [PMID: 27498991 DOI: 10.1016/j.jri.2016.07.002] [Citation(s) in RCA: 48] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2016] [Revised: 07/07/2016] [Accepted: 07/11/2016] [Indexed: 12/19/2022]
Abstract
Tissue homeostasis in the female genital tract is challenged by infection, damage, and even physiological events during reproductive cycles. We propose that the evolutionarily ancient system of innate immunity is sufficient to sense and respond to danger in the non-pregnant female genital tract. Innate immunity produces a rapidly inducible, non-specific response when cells sense danger. Here we provide a primer on innate immunity and discuss what is known about how danger signals are sensed in the endometrium and ovary, the impact of inflammatory responses on reproduction, and how endocrinology and innate immunity are integrated. Endometrial epithelial and stromal cells, and ovarian granulosa cells express pattern recognition receptors, similar to cells of the innate immune system. These pattern recognition receptors, such as the Toll-like receptors, bind pathogen-associated or damage-associated molecular patterns. Activation of pattern recognition receptors leads to inflammation, recruitment of immune cells from the peripheral circulation, and phagocytosis. Although the inflammatory response helps maintain or restore endometrial health, there may also be negative consequences for fertility, including perturbation of oocyte competence. The intensity of the inflammatory response reflects the balance between the level of danger and the systems that regulate innate immunity, including the endocrine environment. Understanding innate immunity is important because disease and inappropriate inflammatory responses in the endometrium or ovary cause infertility.
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Affiliation(s)
- Iain Martin Sheldon
- Institute of Life Science, Swansea University Medical School, Swansea University, Singleton Park, Swansea, SA2 8PP, UK.
| | - Siân-Eleri Owens
- Institute of Life Science, Swansea University Medical School, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
| | - Matthew Lloyd Turner
- Institute of Life Science, Swansea University Medical School, Swansea University, Singleton Park, Swansea, SA2 8PP, UK
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21
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Ozgocer T, Yildiz S, Elbe H, Vardi N. Endotoxin exposure and puberty in female rats: the role of nitric oxide and caspase-1 inhibition in neonates. Can J Physiol Pharmacol 2015; 93:603-14. [PMID: 26061900 DOI: 10.1139/cjpp-2014-0559] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Bacterial toxins are widespread in the environment as well as in the digestive system of humans and animals. Toxin from Gram-negative bacteria (endotoxin or lipopolysaccharide; LPS) has a life-long programming effect on reproduction in rats, but the mediators have not been well-documented, so we investigated the effects of LPS on the timing of puberty in female rats. Because the levels of nitric oxide (NO) and interleukin 1β (IL-1β) increase following injection of LPS, we injected neonates (post-natal day (pnd) 7) with LPS, with or without NO or IL-1β inhibitors. Half of the prepubescent (pnd 30) animals received an additional LPS injection. Vaginal opening, number of ovarian follicles, and serum anti-LPS antibodies were determined. A single LPS injection was sufficient to reduce the primordial follicle pool, but puberty was delayed when rats received 2 LPS injections (at pnd 7 and 30). NO or IL-1β inhibitors improved both of these parameters, suggesting that the early detrimental effects of LPS on puberty and primordial follicle pool are mediated by NO and IL-1β.
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Affiliation(s)
- Tuba Ozgocer
- a Department of Physiology, Faculty of Medicine, University of Inonu, 44280 Malatya, Turkey
| | - Sedat Yildiz
- a Department of Physiology, Faculty of Medicine, University of Inonu, 44280 Malatya, Turkey
| | - Hulya Elbe
- c Department of Histology and Embryology, Faculty of Medicine, University of Muğla Sıtkı Koçman, Mugla, Turkey
| | - Nigar Vardi
- b Department of Histology and Embryology, Faculty of Medicine, University of Inonu, 44280 Malatya, Turkey
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22
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Sominsky L, Fuller EA, Hodgson DM. Factors in Early-Life Programming of Reproductive Fitness. Neuroendocrinology 2015; 102:216-25. [PMID: 26043876 DOI: 10.1159/000431378] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 11/17/2014] [Accepted: 05/14/2015] [Indexed: 11/19/2022]
Abstract
Fertility rates have been declining worldwide, with a growing number of young women suffering from infertility. Infectious and inflammatory diseases are important causes of infertility, and recent evidence points to the critical role of the early-life microbial environment in developmental programming of adult reproductive fitness. Our laboratory and others have demonstrated that acute exposure to an immunological challenge early in life has a profound and prolonged impact on male and female reproductive development. This review presents evidence that perinatal exposure to immunological challenge by a bacterial endotoxin, lipopolysaccharide, acts at all levels of the hypothalamic-pituitary-gonadal axis, resulting in long-lasting changes in reproductive function, suggesting that disposition to infertility may begin early in life.
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Affiliation(s)
- Luba Sominsky
- Laboratory of Neuroimmunology, School of Psychology, Faculty of Science and IT, The University of Newcastle, Newcastle, N.S.W., Australia
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23
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O'Shea LC, Hensey C, Fair T. Progesterone Regulation of AVEN Protects Bovine Oocytes from Apoptosis During Meiotic Maturation1. Biol Reprod 2013; 89:146. [DOI: 10.1095/biolreprod.113.111880] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/19/2023] Open
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24
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Sominsky L, Sobinoff AP, Jobling MS, Pye V, McLaughlin EA, Hodgson DM. Immune regulation of ovarian development: programming by neonatal immune challenge. Front Neurosci 2013; 7:100. [PMID: 23781169 PMCID: PMC3679471 DOI: 10.3389/fnins.2013.00100] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2013] [Accepted: 05/22/2013] [Indexed: 12/20/2022] Open
Abstract
Neonatal immune challenge by administration of lipopolysaccharide (LPS) produces enduring alterations in the development and activity of neuroendocrine, immune and other physiological systems. We have recently reported that neonatal exposure to an immune challenge by administration of LPS results in altered reproductive development in the female Wistar rat. Specifically, LPS-treated animals exhibited diminished ovarian reserve and altered reproductive lifespan. In the current study, we examined the cellular mechanisms that lead to the previously documented impaired ovulation and reduced follicular pool. Rats were administered intraperitoneally either 0.05 mg/kg of LPS (Salmonella Enteritidis) or an equivalent volume of non-pyrogenic saline on postnatal days (PNDs) 3 and 5, and ovaries were obtained on PND 7. Microarray analysis revealed a significant upregulation in transcript expression (2-fold change; p < 0.05) for a substantial number of genes in the ovaries of LPS-treated animals, implicated in immune cell signaling, inflammatory responses, reproductive system development and disease. Several canonical pathways involved in immune recognition were affected by LPS treatment, such as nuclear factor-κB (NF-κB) activation and LPS-stimulated mitogen-activated protein kinase (MAPK) signaling. Quantitative Real-time PCR analysis supported the microarray results. Protein expression analysis of several components of the MAPK signaling pathway revealed a significant upregulation in the expression of Toll-like receptor 4 (TLR4) in the neonatal ovary of LPS-treated animals. These results indicate that neonatal immune challenge by administration of LPS has a direct effect on the ovary during the sensitive period of follicular formation. Given the pivotal role of inflammatory processes in the regulation of reproductive health, our findings suggest that early life immune activation via TLR signaling may have significant implications for the programming of ovarian development and fertility.
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Affiliation(s)
- Luba Sominsky
- Laboratory of Neuroimmunology, Faculty of Science and IT, School of Psychology, The University of Newcastle Callaghan, NSW, Australia
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Bromfield JJ, Sheldon IM. Lipopolysaccharide Reduces the Primordial Follicle Pool in the Bovine Ovarian Cortex Ex Vivo and in the Murine Ovary In Vivo1. Biol Reprod 2013; 88:98. [DOI: 10.1095/biolreprod.112.106914] [Citation(s) in RCA: 66] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/01/2022] Open
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Bromfield JJ, Sheldon IM. Lipopolysaccharide initiates inflammation in bovine granulosa cells via the TLR4 pathway and perturbs oocyte meiotic progression in vitro. Endocrinology 2011; 152:5029-40. [PMID: 21990308 PMCID: PMC3428914 DOI: 10.1210/en.2011-1124] [Citation(s) in RCA: 127] [Impact Index Per Article: 9.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/19/2022]
Abstract
Infections of the reproductive tract or mammary gland with Gram-negative bacteria perturb ovarian function, follicular growth, and fecundity in cattle. We hypothesized that lipopolysaccharide (LPS) from Gram-negative bacteria stimulates an inflammatory response by ovarian granulosa cells that is mediated by Toll-like receptor (TLR) 4. The present study tested the capacity of bovine ovarian granulosa cells to initiate an inflammatory response to pathogen-associated molecular patterns and determined subsequent effects on the in vitro maturation of oocytes. Granulosa cells elicited an inflammatory response to pathogen-associated molecular patterns (LPS, lipoteichoic acid, peptidoglycan, or Pam3CSK4) with accumulation of the cytokine IL-6, and the chemokine IL-8, in a time- and dose-dependent manner. Granulosa cells responded acutely to LPS with rapid phosphorylation of TLR signaling components, p38 and ERK, and increased expression of IL6 and IL8 mRNA, although nuclear translocation of p65 was not evident. Targeting TLR4 with small interfering RNA attenuated granulosa cell accumulation of IL-6 in response to LPS. Endocrine function of granulosa cells is regulated by FSH, but here, FSH also enhanced responsiveness to LPS, increasing IL-6 and IL-8 accumulation. Furthermore, LPS stimulated IL-6 secretion and expansion by cumulus-oocyte complexes and increased rates of meiotic arrest and germinal vesicle breakdown failure. In conclusion, bovine granulosa cells initiate an innate immune response to LPS via the TLR4 pathway, leading to inflammation and to perturbation of meiotic competence.
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Affiliation(s)
- John J Bromfield
- Institute of Life Science, School of Medicine, Swansea University, Singleton Park, Swansea SA2 8PP, United Kingdom.
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Sheldon IM, Bromfield JJ. Innate Immunity in the Human Endometrium and Ovary. Am J Reprod Immunol 2011; 66 Suppl 1:63-71. [DOI: 10.1111/j.1600-0897.2011.01034.x] [Citation(s) in RCA: 45] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/01/2022] Open
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MacKenzie S, Montserrat N, Mas M, Acerete L, Tort L, Krasnov A, Goetz FW, Planas JV. Bacterial lipopolysaccharide induces apoptosis in the trout ovary. Reprod Biol Endocrinol 2006; 4:46. [PMID: 16945135 PMCID: PMC1570353 DOI: 10.1186/1477-7827-4-46] [Citation(s) in RCA: 36] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 06/01/2006] [Accepted: 08/31/2006] [Indexed: 11/17/2022] Open
Abstract
BACKGROUND In mammals it is well known that infections can lead to alterations in reproductive function. As part of the innate immune response, a number of cytokines and other immune factors is produced during bacterial infection or after treatment with lipopolysaccharide (LPS) and acts on the reproductive system. In fish, LPS can also induce an innate immune response but little is known about the activation of the immune system by LPS on reproduction in fish. Therefore, we conducted studies to examine the in vivo and in vitro effects of lipopolysaccharide (LPS) on the reproductive function of sexually mature female trout. METHODS In saline- and LPS -injected brook trout, we measured the concentration of plasma steroids as well as the in vitro steroidogenic response (testosterone and 17alpha-hydroxyprogesterone) of ovarian follicles to luteinizing hormone (LH), the ability of 17alpha,20beta-dihydroxy-4-pregnen-3-one to induce germinal vesicle breakdown (GVBD) in vitro, and that of epinephrine to stimulate follicular contraction in vitro. We also examined the direct effects of LPS in vitro on steroid production, GVBD and contraction in brook trout ovarian follicles. The incidence of apoptosis was evaluated by TUNEL analysis. Furthermore, we examined the gene expression pattern in the ovary of saline- and LPS-injected rainbow trout by microarray analysis. RESULTS LPS treatment in vivo did not affect plasma testosterone concentration or the basal in vitro production of steroids, although a small but significant potentiation of the effects of LH on testosterone production in vitro was observed in ovarian follicles from LPS-treated fish. In addition, LPS increased the plasma concentration of cortisol. LPS treatment in vitro did not affect the basal or LH-stimulated steroid production in brook trout ovarian follicles. In addition, we did not observe any effects of LPS in vivo or in vitro on GVBD or follicular contraction. Therefore, LPS did not appear to impair ovarian steroid production, oocyte final maturation or follicular contraction under the present experimental conditions. Interestingly, LPS administration in vivo induced apoptosis in follicular cells, an observation that correlated with changes in the expression of genes involved in apoptosis, as evidenced by microarray analysis. CONCLUSION These results indicate that female trout are particularly resistant to an acute administration of LPS in terms of ovarian hormone responsiveness. However, LPS caused a marked increase in apoptosis in follicular cells, suggesting that the trout ovary could be sensitive to the pro-apoptotic effects of LPS-induced inflammatory cytokines.
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Affiliation(s)
- Simon MacKenzie
- Unitat de Fisiologia Animal, Departament de Biologia Cellular, Fisiologia i d'Immunologia, Facultat de Ciencies, Universitat Autonoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Nuria Montserrat
- Departament de Fisiologia, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - Mario Mas
- Departament de Fisiologia, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
| | - Laura Acerete
- Unitat de Fisiologia Animal, Departament de Biologia Cellular, Fisiologia i d'Immunologia, Facultat de Ciencies, Universitat Autonoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Lluis Tort
- Unitat de Fisiologia Animal, Departament de Biologia Cellular, Fisiologia i d'Immunologia, Facultat de Ciencies, Universitat Autonoma de Barcelona, Bellaterra, Barcelona, Spain
| | - Aleksei Krasnov
- Institute of Applied Biotechnology, University of Kuopio, Kuopio, Finland
- Akvaforsk, PO Box 5010, N-1432 Ås, Norway
| | - Frederick W Goetz
- Great Lakes Water Institute, University of Wisconsin-Milwaukee, Wisconsin, USA
| | - Josep V Planas
- Departament de Fisiologia, Facultat de Biologia, Universitat de Barcelona, Barcelona, Spain
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Reinsberg J, Christoffel S, Kumar A, van der Ven H. Escherichia coli derived factors modulate human granulosa cell steroidogenesis. ACTA ACUST UNITED AC 2005; 185:303-12. [PMID: 16266371 DOI: 10.1111/j.1365-201x.2005.01497.x] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
AIM In order to identify bacterial compounds which directly affect granulosa cell steroidogenesis, the effect of culture-supernatants and extracts from Escherichia coli were tested in an in vitro granulosa cell culture model. METHODS Samples were drawn from the culture-supernatant of E. coli ATCC25922 cultured in Luria-broth medium. Bacterial extract was prepared by incubation of freshly harvested bacteria in buffer. The bacterial culture-supernatants and extracts were added to human granulosa cells in culture. The granulosa cells collected from the follicular aspirates from women undergoing in-vitro fertilization were cultured for 17-53 h and progesterone or oestradiol was assayed in the spent culture medium. RESULTS The E. coli culture-supernatant stimulated the basal granulosa cell progesterone production demonstrating its maximum activity reached after 200-240 min of bacterial growth. The heat denaturated bacterial extract as well as its low-molecular-weight fraction (<10 kDa) stimulated both the basal and the hCG-stimulated progesterone production; the oestradiol production was slightly inhibited. Stimulation of progesterone production was time dependent increasing from 125 +/- 18% of control within the first 3 h to 205 +/- 35% within 17-53 h. The high-molecular-weight fraction (>30 kDa) of the bacterial extract inhibited progesterone production. The inhibitory activity was significantly diminished by heat denaturation. CONCLUSIONS The present study demonstrates the existence of various compounds which are secreted by E. coli and could also be extracted out of E. coli bacteria. These bacterial compounds modulate ovarian steroidogenesis. Further studies are needed to clarify how far these compounds contribute to menstrual disturbance observed in chronic pelvic inflammation.
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Affiliation(s)
- J Reinsberg
- Department of Gynecological Endocrinology and Reproductive Medicine, University of Bonn, Bonn, Germany.
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Soto P, Natzke RP, Hansen PJ. Identification of Possible Mediators of Embryonic Mortality Caused by Mastitis: Actions of Lipopolysaccharide, Prostaglandin F2α
, and the Nitric Oxide Generator, Sodium Nitroprusside Dihydrate, on Oocyte Maturation and Embryonic Development in Cattle. Am J Reprod Immunol 2003; 50:263-72. [PMID: 14629032 DOI: 10.1034/j.1600-0897.2003.00085.x] [Citation(s) in RCA: 104] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022] Open
Abstract
PROBLEM Mastitis and immunization against constituents of organisms causing mastitis can reduce fertility of cattle and sheep, respectively. For the current experiments, it was hypothesized that these effects are mediated via actions of lipopolysaccharide (LPS), prostaglandin F2alpha (PGF2), and nitric oxide on oocyte maturation and embryonic development. METHOD OF STUDY To evaluate effects on oocyte maturation, oocytes were matured with various concentrations of LPS, PGF2alpha, or the nitric oxide (NO) generator, sodium nitroprusside (SNP). Following maturation, oocytes were fertilized and cultured until day 8 after fertilization. To test effects on embryo growth, oocytes were matured and fertilized and cultured after fertilization with LPS, PGF2alpha, or SNP. RESULTS Addition of 100 and 1000 ng/mL LPS and 50 and 100 ng/mL PGF2alpha to oocyte maturation medium reduced the proportion of oocytes that became blastocysts at day 8 after fertilization. When added after fertilization, in contrast, neither LPS nor PGF2alpha reduced development to the blastocyst stage. Unlike for LPS and PGF2alpha, addition of SNP during oocyte maturation was without effect on the proportion of oocytes that became blastocysts at day 8 after fertilization. However, addition of 10 microM SNP to culture medium after fertilization completely prevented development to the blastocyst stage while 0.1 and 1 microM SNP did not affect development. CONCLUSIONS Results indicate that increased local concentrations of LPS, PGF2alpha, and NO can have deleterious consequences on oocyte function (LPS, PGF2alpha) and embryonic development (NO). Thus, these molecules are putative mediators of effects of infectious disease or inflammation, including mastitis, on fertility of cattle.
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Affiliation(s)
- P Soto
- Department of Animal Sciences, University of Florida, Gainesville, FL 32611-0910, USA
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