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Lin X, Tong X, Zhang Y, Gu W, Huang Q, Zhang Y, Zhuo F, Zhao F, Jin X, Li C, Huang D, Zhang S, Dai Y. Decreased Expression of EZH2 in Granulosa Cells Contributes to Endometriosis-Associated Infertility by Targeting IL-1R2. Endocrinology 2022; 164:6916877. [PMID: 36524678 PMCID: PMC9825353 DOI: 10.1210/endocr/bqac210] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/05/2022] [Revised: 12/07/2022] [Accepted: 12/08/2022] [Indexed: 12/23/2022]
Abstract
The mechanism by which endometriosis, a common gynecological disease characterized by chronic pelvic pain and infertility, causes infertility remains elusive. Luteinized unruptured follicle syndrome, the most common type of ovulatory dysfunction, is a cause of endometriosis-associated infertility involving reduced numbers of retrieved and mature oocytes. Ovulation is controlled by luteinizing hormone and paracrine signals produced within the follicle microenvironment. Generally, interleukin (IL)-1β is elevated in endometriosis follicular fluid, whereby it amplifies ovulation signals by activating extracellular-regulated kinase 1/2 and CCAAT/enhancer binding protein β pathways. However, this amplification of ovulation by IL-1β does not occur in patients with endometriosis. To illuminate the mechanism of ovulatory dysfunction in endometriosis, we analyzed the effect of oxidative stress and IL-1β expression on endometriosis follicles. We found that oxidative stress decreased EZH2 expression and reduced H3K27Me3 levels in endometriosis ovarian granulosa cells (GCs). Selective Ezh2 depletion in mice ovarian GCs reduced fertility by disturbing cumulus-oocyte complex expansion and reducing epidermal growth factor-like factor expression. Gene expression and H3K27Me3 ChIP-sequencing (ChIP-Seq) of GCs revealed IL-1 receptor 2 (IL-1R2), a high-affinity IL-1β-receptor that suppresses IL-1β-mediated inflammatory cascades during ovulation, as a crucial target gene of the EZH2-H3K27Me3 axis. Moreover, IL-1β addition did not restore ovulation upon Ezh2 knockdown, indicating a vital function of IL-1R2 in endometriosis. Thus, our findings show that reducing EZH2 and H3K27Me3 in GCs suppressed ovulatory signals by increasing IL-1R2 expression, which may ultimately contribute to endometriosis-associated infertility.
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Affiliation(s)
| | | | - Yinli Zhang
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Shangcheng District, Hangzhou 310016, China
- Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Shangcheng District, Hangzhou 310016, China
| | - Weijia Gu
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Shangcheng District, Hangzhou 310016, China
| | - Qianmeng Huang
- Department of Obstetrics and Gynecology, The Second Affiliated Hospital and Yuying Children's Hospital of Wenzhou Medical University, No. 109 Xueyuan WestRoad, Lucheng District, Wenzhou 325000, China
| | - Yi Zhang
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Shangcheng District, Hangzhou 310016, China
| | - Feng Zhuo
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Shangcheng District, Hangzhou 310016, China
- Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Shangcheng District, Hangzhou 310016, China
| | - Fanxuan Zhao
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Shangcheng District, Hangzhou 310016, China
| | - Xiaoying Jin
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Shangcheng District, Hangzhou 310016, China
- Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Shangcheng District, Hangzhou 310016, China
| | - Chao Li
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Shangcheng District, Hangzhou 310016, China
- Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Shangcheng District, Hangzhou 310016, China
| | - Dong Huang
- Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, Shangcheng District, Hangzhou 310016, China
- Key Laboratory of Reproductive Dysfunction Management of Zhejiang Province, Shangcheng District, Hangzhou 310016, China
| | - Songying Zhang
- Correspondence: Yongdong Dai, PhD, Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Rd, Shangcheng District, Hangzhou 310016, China. ; or Songying Zhang, MD, Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Rd, Shangcheng District, Hangzhou 310016, China.
| | - Yongdong Dai
- Correspondence: Yongdong Dai, PhD, Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Rd, Shangcheng District, Hangzhou 310016, China. ; or Songying Zhang, MD, Assisted Reproduction Unit, Department of Obstetrics and Gynecology, Sir Run Shaw Hospital, Zhejiang University School of Medicine, No. 3 Qingchun East Rd, Shangcheng District, Hangzhou 310016, China.
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Cai H, Jin S, Lin J, Yu L, Qian P, Chen W. IL-34 was high in serum of women with polycystic ovary syndrome and may function as potential diagnostic biomarker and therapeutic target. J Obstet Gynaecol Res 2022; 48:973-979. [PMID: 35199410 DOI: 10.1111/jog.15141] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/21/2021] [Revised: 11/23/2021] [Accepted: 12/18/2021] [Indexed: 10/19/2022]
Abstract
BACKGROUND Polycystic ovary syndrome (PCOS) is one of the most prevalent endocrine disorders in females of reproductive age, with a prevalence of 20%-33% in the general population. Interleukin (IL)-34 is a recently explored proinflammatory cytokine and is an important modulator in different disease types. However, the function of IL-34 in PCOS has yet to be investigated. OBJECTIVE The purpose of this study was to determine the IL-34 serum level in women with PCOS and to compare it to that of a relatively healthy control group. Focusing on its relationship with IL-6, TNF-α, and IL-1β and homeostatic model assessment for insulin resistance (HOMA-IR), triglyceride, and low-density lipoprotein cholesterol (LDL-C). MATERIALS AND METHODS In this study, blood samples were obtained from 100 women with PCOS and 100 healthy control women for the purpose of estimating their serum levels of IL-34, IL-6, TNF-α, and IL-1β using the enzyme-linked immunosorbent assay technique. RESULTS Serum levels of IL-34, IL-6, TNF-α, and IL-1β were all higher in PCOS women than in healthy controls, and the difference was highly statistically significant. Serum IL-34 concentration was positively correlated with IL-6, TNF-α, and IL-1β concentration. Additionally, serum concentrations of IL-34 were positively correlated with HOMA-IR, triglyceride, and LDL-C. CONCLUSION When compared to normal women, IL-34, IL-6, TNF-α, and IL-1β levels were highly statistically significant in PCOS, and these high levels were associated with other cytokines (IL-6, TNF-α, and IL-1β), HOMA-IR, triglyceride, and LDL-C.
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Affiliation(s)
- Huaping Cai
- Department of Gynaecology, Tongxiang Maternal and Child Health Hospital, Jiaxing, China
| | - Shuman Jin
- Department of Clinical Laboratory, Tongxiang Maternal and Child Health Hospital, Jiaxing, China
| | - Jinfang Lin
- Department of Gynaecology, Obstetrics and Gynecology Hospital of Fudan University, Shanghai, China
| | - Liying Yu
- Department of Gynaecology, Tongxiang Maternal and Child Health Hospital, Jiaxing, China
| | - Panlian Qian
- Department of Gynaecology, Tongxiang Maternal and Child Health Hospital, Jiaxing, China
| | - Weimin Chen
- Department of Gynaecology, Tongxiang Maternal and Child Health Hospital, Jiaxing, China
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Silva JRV, Lima FEO, Souza ALP, Silva AWB. Interleukin-1β and TNF-α systems in ovarian follicles and their roles during follicular development, oocyte maturation and ovulation. ZYGOTE 2020; 28:270-7. [PMID: 32383419 DOI: 10.1017/S0967199420000222] [Citation(s) in RCA: 17] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
Abstract
Tumour necrosis factor-α (TNF-α) and interleukin-1β (IL-1β) are cytokines that are involved in the development, proliferation and apoptosis of ovarian follicular cells in domestic mammals. The expression of these cytokines in various follicular compartments, depending on the stage of follicle development, demonstrates their involvement in the control of primordial follicle growth up to the preovulatory stage. The mechanism of action of these factors depends on the presence of their receptors that transduce their biological actions. This review shows the expression sites of TNF-α, IL-1β and their receptors in ovarian follicles, and discusses the mechanism of action of these cytokines during follicle development, oocyte maturation and ovulation in domestic animals.
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Lima F, Bezerra F, Souza GB, Matos M, van den Hurk R, Silva J. Influence of interleukin 1 beta and tumour necrosis factor alpha on the in vitro growth, maturation and mitochondrial distribution of bovine oocytes from small antral follicles. ZYGOTE 2018; 26:381-7. [PMID: 30378512 DOI: 10.1017/S0967199418000382] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022]
Abstract
SummaryThis study aimed to investigate the effects of IL1β and TNFα on growth and maturation of oocytes from small follicles (1-3 mm) during in vitro culture. To this end, cumulus-oocyte complexes (COCs) with diameters of ~110 µm were cultured in TCM-199 medium alone or supplemented with IL1β (10 ng/ml), TNFα (10 ng/ml) or both for 48 h. The oocytes were measured at the beginning and at the end of the culture period. COCs were cultured for 20 h in pre-maturation medium and then half of the COCs of each group was destined for in vitro maturation and the remaining COCs were used to evaluate meiotic progression, mitochondrial distribution and the expression of mRNAs for GDF-9, c-Mos, Cyclin-B1 and H1foo. The results showed that COCs cultured with TNFα alone or together with IL1β had higher diameters than those cultured in control medium alone or supplemented with IL1β. Control oocytes isolated from large antral follicles (>5 mm) had heterogeneous distribution of mitochondria. Oocytes isolated from small antral follicles, that had been grown in vitro in TCM-199 alone or supplemented with TNFα had similar heterogeneous mitochondrial distribution before in vitro maturation (IVM). After IVM, mitochondria were heterogeneously distribution when cultured in TCM-199. However, when cultured with TNFα and/or IL1β, mitochondria were homogeneously distributed. Presence of TNFα and/or IL1β in TCM-199 culture medium did not influence the expression of mRNAs for GDF-9, c-Mos, Cyclin-B1 and H1foo. In conclusion, TNFα and a mixture of TNFα and IL1β both stimulated the growth of bovine oocytes during their in vitro culture, but do not influence gene expression in grown oocytes.
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Silva A, Passos J, Dau A, De Cesaro M, Ferst J, dos Santos JT, Bezerra F, Costa J, Paulino L, Donato M, Peixoto C, Gonçalves P, Silva J. In vivo effects of GnRH on expression of interleukin 1 (IL-1) system members in bovine preovulatory follicles and the influence of IL-1β on cumulus-oocyte complexes cultured in vitro. Livest Sci 2017. [DOI: 10.1016/j.livsci.2017.11.002] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Passos JRS, Costa JJN, da Cunha EV, Silva AWB, Ribeiro RP, de Souza GB, Barroso PAA, Dau AMP, Saraiva MVA, Gonçalves PBD, van den Hurk R, Silva JRV. Protein and messenger RNA expression of interleukin 1 system members in bovine ovarian follicles and effects of interleukin 1β on primordial follicle activation and survival in vitro. Domest Anim Endocrinol 2016; 54:48-59. [PMID: 26513156 DOI: 10.1016/j.domaniend.2015.09.002] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/13/2015] [Revised: 09/11/2015] [Accepted: 09/16/2015] [Indexed: 11/21/2022]
Abstract
This study aimed to investigate the expression of interleukin 1 (IL-1) system members (proteins and messenger RNA of ligands and receptors) and its distribution in ovarian follicles of cyclic cows and to evaluate the effects of IL-1β on the survival and activation of primordial follicles in vitro. The ovaries were processed for localization of IL-1 system in preantral and antral follicles by immunohistochemical, real-time polymerase chain reaction, and Western blot analysis. For in vitro studies, ovarian fragments were cultured in α-MEM(+) supplemented with IL-1β (0, 1, 10, 50, or 100 ng/mL), and after 6 d, the cultured tissues were processed for histologic analysis. Immunohistochemical results showed that the IL-1 system proteins IL-1β, IL-1RA, IL-1RI, and IL-1RII were detected in the cytoplasm of oocytes and granulosa cells from all follicular categories and theca cells of antral follicles. Variable levels of messenger RNA for the IL-1 system members were observed at different stages of development. After 6 d of culture, the presence of IL-1β (10 or 50 ng/mL) was effective in maintaining the percentage of normal follicles and in promoting primordial follicle activation. In conclusion, IL-1 system members are differentially expressed in ovarian follicles according to their stage of development. Moreover, IL-1β promotes the development of primordial follicles. These results indicate an important role of the IL-1 system in the regulation of bovine folliculogenesis.
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Affiliation(s)
- J R S Passos
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil
| | - J J N Costa
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil
| | - E V da Cunha
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil
| | - A W B Silva
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil
| | - R P Ribeiro
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil
| | - G B de Souza
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil
| | - P A A Barroso
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil
| | - A M P Dau
- Faculty of Veterinary Medicine, University Veterinary Hospital, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - M V A Saraiva
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil
| | - P B D Gonçalves
- Faculty of Veterinary Medicine, University Veterinary Hospital, Federal University of Santa Maria, Santa Maria, RS, Brazil
| | - R van den Hurk
- Department of Pathobiology, Faculty of Veterinary Medicine, Utrecht University, Utrecht, The Netherlands
| | - J R V Silva
- Faculty of Medicine, Biotechnology Nucleus of Sobral-NUBIS, Federal University of Ceara, Sobral, CE CEP 62042-280, Brazil.
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Field SL, Dasgupta T, Cummings M, Orsi NM. Cytokines in ovarian folliculogenesis, oocyte maturation and luteinisation. Mol Reprod Dev 2013; 81:284-314. [DOI: 10.1002/mrd.22285] [Citation(s) in RCA: 97] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2013] [Accepted: 11/18/2013] [Indexed: 01/22/2023]
Affiliation(s)
- Sarah L Field
- Women's Health Research Group; Leeds Institute of Cancer; Anatomy and Pathology; Wellcome Trust Brenner Building; St James's University Hospital; Leeds UK
| | - Tathagata Dasgupta
- Department of Systems Biology; Harvard Medical School; 200 Longwood Avenue Boston Massachusetts
| | - Michele Cummings
- Women's Health Research Group; Leeds Institute of Cancer; Anatomy and Pathology; Wellcome Trust Brenner Building; St James's University Hospital; Leeds UK
| | - Nicolas M. Orsi
- Women's Health Research Group; Leeds Institute of Cancer; Anatomy and Pathology; Wellcome Trust Brenner Building; St James's University Hospital; Leeds UK
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Baston-Büst DM, Schanz A, Böddeker SJ, Altergot-Ahmad O, Krüssel JS, Rein D, Hess AP. CXCL1 expression in human decidua in vitro is mediated via the MAPK signalling cascade. Cytokine 2013; 64:79-85. [DOI: 10.1016/j.cyto.2013.07.023] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/26/2013] [Revised: 07/18/2013] [Accepted: 07/21/2013] [Indexed: 12/26/2022]
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Abstract
Human oviductal cells produce complement-3 (C3) and its derivative, iC3b. These molecules are important in immune responses. Our recent study suggested that iC3b also possessed embryotrophic activity and it stimulates the blastulation and hatching rates of in vitro cultured mouse embryos. The objective is to study the impact of C3 deficiency on early pregnancy in vivo using homozygous C3-deficient (C3KO) and wild-type (C3WT) mice. C3 protein was undetectable in the reproductive tissues of C3KO mice. Deficiency in C3 is associated with significantly longer estrous cycle (P = 0.037). No significant difference was found in the ovulation rate, total cell count in blastocysts and implantation rate between the wild-type and the C3KO mice, though C3KO mice tended to have lower values in the latter two parameters. On day 15 of pregnancy, C3KO mice had fewer conceptus (P < 0.001) and higher resorption rate (P < 0.001) than that of C3WT mice. The fetal and placental weights (P < 0.001) were lower in the C3KO mice. The placenta of C3KO mice had smaller spongiotrophoblast (P = 0.001) and labyrinth (P = 0.037). Deficiency in C3 is associated with mild impairment in early pregnancy including longer estrous cycle and higher resorption rates after implantation. The impairment may be related to compromised placental development leading to under-developed fetuses.
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Affiliation(s)
- Wang-Ngai Chow
- Department of Obstetrics and Gynaecology, The University of Hong Kong, Pokfulam, Hong Kong, China
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Caillaud M, Gérard N. In vivo and in vitro effects of interleukin-1beta on equine oocyte maturation and on steroidogenesis and prostaglandin synthesis in granulosa and cumulus cells. Reprod Fertil Dev 2009; 21:265-73. [PMID: 19210917 DOI: 10.1071/rd08046] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2008] [Accepted: 09/08/2008] [Indexed: 11/23/2022] Open
Abstract
We analysed the effect of interleukin-1 on oocyte maturation and on steroid and prostaglandin production by equine granulosa and cumulus cells. In Experiment 1, interleukin-1beta (IL-1beta) was injected into the growing dominant follicle, which was punctured 38 h later. Follicular fluid was assayed for steroids and prostaglandin-F2alpha (PGF2alpha). Granulosa cells were analysed for 3beta-hydroxysteroid dehydrogenase (3beta-HSD), progesterone receptor (PR), cyclooxygenase 1 and 2 (Cox 1 and Cox 2) and steroidogenic acute regulatory protein (StAR) mRNAs. In Experiment 2, cumulus-oocyte complexes (COCs) were collected from slaughterhouse ovaries and cultured in different media: control group (TCM199 + BSA); Group 2 (+ IL-1beta); Group 3 (+ EGF); Group 4 (+ EGF + IL-1beta); and Group 5 (+ EGF + IL-1beta + IL-1RA). Cumulus cells were analysed for 3beta-HSD, PR, Cox 1, Cox 2 and StAR mRNAs. After injections of crude equine gonadotropin (CEG; LH effect) or IL-1beta, progesterone and PGF2alpha levels increased, whereas 17beta-oestradiol decreased. EGF induced an increase in the rate of in vitro maturation (P < 0.05), whereas IL-1beta had a limited effect. IL-1beta significantly decreased the rate of EGF-induced oocyte maturation (P < 0.05). Cox 2 mRNA level increases in granulosa cells after CEG injection (P = 0.07). In cumulus cells, StAR and PR mRNAs were lower in Group 2 and 3beta-HSD mRNA was higher in Groups 4 and 5. These data confirm that IL-1 is involved in equine oocyte in vitro maturation. We demonstrated in vivo that IL-1beta has an effect on steroids and PGF2alpha secretion in the preovulatory follicle.
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Affiliation(s)
- Maud Caillaud
- INRA, UMR 85 Physiologie de la Reproduction et des Comportements, F-37380 Nouzilly, France
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Caillaud M, Dell'aquila ME, De Santis T, Nicassio M, Lacalandra GM, Goudet G, Gérard N. In vitro equine oocyte maturation in pure follicular fluid plus interleukin-1 and fertilization following ICSI. Anim Reprod Sci 2007; 106:431-9. [PMID: 17628364 DOI: 10.1016/j.anireprosci.2007.06.005] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/16/2007] [Revised: 05/29/2007] [Accepted: 06/06/2007] [Indexed: 11/23/2022]
Abstract
The interleukin-1 (IL-1) system is thought to be involved in periovulatory events in the mare. Previous in vivo studies have demonstrated that IL-1beta induces oocyte maturation, but depresses the pregnancy rate 14 days after ovulation. To better understand the role of IL-1 in oocyte maturation and fertilization, the effects of IL-1 on the in vitro maturation rate of equine oocytes in pure follicular fluid were evaluated and fertilization rate assessed following intracytoplasmic sperm injection (ICSI). Oocytes collected from slaughterhouse ovaries were cultured in four different media for 30 h prior to fertilization. Two experiments were performed, each using three maturation media as the experimental treatments. Medium 1 was pure follicular fluid from subordinate follicles. Medium 2 was medium 1 plus 50 ng/ml recombinant human IL-1beta. Medium 3 was pure follicular fluid collected from mares administered crude equine gonadotropin (CEG). Medium 4 was medium 2 plus 50 ng/ml of recombinant human IL-1 receptor antagonist. Media 1, 2 and 3 were compared in experiment 1. In experiment 2, media 1, 2 and 4 were compared. After maturation, metaphase II oocytes were submitted to microinjection and assessed for signs of fertilization. In experiment 1, 101 oocytes were evaluated. The rate of polar body extrusion was 66, 51 and 68% and the proportions of normally fertilized oocytes after ICSI were 40, 18 and 38% for media 1, 2 and 3, respectively. In experiment 2, 122 oocytes were evaluated. The rate of polar body extrusion was 55, 48 and 42% and the proportions showing normal fertilization after ICSI were 14, 25 and 29% for media 1, 2 and 4, respectively. There was no positive effect of IL-1beta on maturation in both experiments, but the fertilization rate and percentage of embryos reaching four-cell were low in the presence of IL-1beta, indicating that this cytokine may interfere with fertilization and early embryo development.
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Affiliation(s)
- M Caillaud
- INRA, CNRS, Université de Tours, Haras Nationaux, IFR 135, 37380 Nouzilly, France.
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Caillaud M, Duchamp G, Gérard N. In vivo effect of interleukin-1beta and interleukin-1RA on oocyte cytoplasmic maturation, ovulation, and early embryonic development in the mare. Reprod Biol Endocrinol 2005; 3:26. [PMID: 15972098 PMCID: PMC1182395 DOI: 10.1186/1477-7827-3-26] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/21/2005] [Accepted: 06/22/2005] [Indexed: 11/24/2022] Open
Abstract
A growing body of evidence suggests that the interleukin-1 system is involved in periovulatory events. Previous work from our lab demonstrated that in the mare, interleukin-1beta (IL-1beta) increases the ovulatory rate of metaphase II oocytes. The present study was conducted to analyze in vivo the effect of IL-1 on oocyte cytoplasmic maturation, ovulation and pregnancy rate. In the present work, IL-1beta (experiment 1, n = 13; experiment 2, n = 25) and interleukin-1RA (IL-1RA; experiment 1, n = 25) were injected intrafollicularly by using the transvaginal ultrasound-guided injection method. Injections were performed on cyclic mares when the diameter of the growing dominant follicle reached 30-34 mm. In experiment 1, mares were inseminated the day of the treatment and all the other day until ovulation. The time of ovulation was determined and a pregnancy diagnosis was performed 14 days after ovulation of the injected follicle. In experiment 2, the cumulus-oocyte complex from each injected follicle was collected by transvaginal ultrasound-guided aspiration 38 h after the intrafollicular injection. Oocyte nuclear stage and oocyte cytoplasmic maturation were assessed by analyzing chromatin configuration, cortical granules migration and mitochondria distribution under a confocal microscope. The results from experiment 1 confirm that an intrafollicular injection of 1 microgram IL-1beta induces ovulation in the mare whereas IL-1RA has no effect at the dose used in the present study. Furthemore, we demonstrated, that in our experimental conditions, IL-1beta and IL-1RA induced a decrease in embryo development. Experiment 2 leads us to observe that IL-1beta is unable to induce cortical granules migration and remodelling of mitochondria, that commonly occurs during oocyte maturation, whereas it acts on nuclear maturation. This result may explain the decrease in embryo development we observed after IL-1beta intrafollicular injection. In conclusion, the present study tends to demonstrate that IL-1beta plays a role in the ovulatory process and may acts on oocyte maturation in the mare, but additional factors are required to complete equine oocyte cytoplasmic maturation to allow embryo development.
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Affiliation(s)
- Maud Caillaud
- Physiologie de la Reproduction et des Comportements. INRA-CNRS-Université de Tours-Haras Nationaux, IFR135, 37380 Nouzilly France
| | - Guy Duchamp
- Physiologie de la Reproduction et des Comportements. INRA-CNRS-Université de Tours-Haras Nationaux, IFR135, 37380 Nouzilly France
| | - Nadine Gérard
- Physiologie de la Reproduction et des Comportements. INRA-CNRS-Université de Tours-Haras Nationaux, IFR135, 37380 Nouzilly France
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