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Damasceno KNM, de Sá NAR, Tetaping GM, Paes VM, de Lima LF, Monreal ACD, de Sousa FGC, Alves BG, de Figueiredo JR, Araújo VR. Ultra-diluted Folliculinum 6 cH impairs ovine oocyte viability and maturation after in vitro culture. Anim Reprod 2020; 17:e20190100. [PMID: 32714448 PMCID: PMC7375870 DOI: 10.1590/1984-3143-ar2019-0100] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/12/2019] [Accepted: 05/05/2020] [Indexed: 11/22/2022] Open
Abstract
This study investigated the effect of Folliculinum 6 cH on the oocyte meiosis resumption and viability rates, progesterone production and mitochondrial activity after in vitro maturation of cumulus-oocyte complexes (COCs) in sheep. Sheep ovaries were collected at a local slaughterhouse and COCs were recovered by slicing technique. The selected COCs were maturated in TCM199 (Control treatment), or control medium supplemented with 0.05% ethanol (v/v) (the vehicle of the homeopathic preparation - Ethanol treatment) or with Folliculinum 6 cH. After 24 h of in vitro maturation (IVM), oocytes were mechanically denuded and incubated with Hoechst 33342 and MitoTracker (0.5 μM) Orange CMTMRos for analysis of viability and chromatin configuration, and mitochondrial activity, respectively. The results showed that Folliculinum 6 cH addition increased oocyte degeneration and reduced meiotic resumption compared to the control (P < 0.05). Interestingly, the percentages meiotic resumption and oocyte maturation were lower in the Folliculinum 6 cH treatment compared to its vehicle (Ethanol treatment) (P < 0.05). On the other hand, when the treatments were compared, higher mitochondrial activity was observed in the Ethanol treatment (P < 0.05). In conclusion, contrary to its vehicle, the addition of Folliculinum 6 cH to the IVM medium promoted oocyte degeneration and affected negatively the mitochondrial distribution, impairing meiosis resumption.
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Affiliation(s)
- Kayse Najara Matos Damasceno
- Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Naiza Arcângela Ribeiro de Sá
- Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Gildas Mbemya Tetaping
- Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Victor Macedo Paes
- Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Laritza Ferreira de Lima
- Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
| | - Antônio Carlos Duenhas Monreal
- Laboratório de Biotecnologia para Pequenos Ruminantes, Faculdade de Ciências Farmacêuticas, Alimentação e Nutrição, Universidade Federal de Mato Grosso do Sul, Campo Grande, MS, Brasil
| | | | - Bênner Geraldo Alves
- Laboratório de Biologia da Reprodução, Instituto de Ciências Biomédicas, Universidade Federal de Uberlândia, Uberlândia, MG, Brasil
| | - José Ricardo de Figueiredo
- Laboratório de Manipulação de Oócitos e Folículos Pré-Antrais, Faculdade de Veterinária, Universidade Estadual do Ceará, Fortaleza, CE, Brasil
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Arias-Álvarez M, García-García RM, Torres-Rovira L, González-Bulnes A, Rebollar PG, Lorenzo PL. Influence of leptin on in vitro maturation and steroidogenic secretion of cumulus–oocyte complexes through JAK2/STAT3 and MEK 1/2 pathways in the rabbit model. Reproduction 2010; 139:523-32. [DOI: 10.1530/rep-09-0309] [Citation(s) in RCA: 25] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/14/2023]
Abstract
Extreme body mass indexes may impair reproductive outcome in assisted reproductive technologies. Leptin reflects the amount of body fat and could act as a modulator of oocyte quality through activation of specific transcription factors. The aim of this work was to establish whether: 1) leptin influences meiotic and cytoplasmic oocyte maturation; 2) STAT3 and MAPK mediate the effects of leptin and 3) leptin modulates steroid secretion by cumulus–oocyte complexes (COC) duringin vitromaturation (IVM). We confirmed immunolocalisation of leptin receptor in oocytes, cumulus/granulosa cells during the peri-ovulatory period. The confocal study showed that COC supplemented with 1, 10 and 100 ng/ml leptin had a significantly higher metaphase II (MII) percentage than those IVM without leptin (P<0.05) and a similar MII index compared to the group supplemented with 10% FCS. Leptin did not increase the percentage of cytoplasmically matured oocytes in terms of cortical granule migration rate, whereas a significantly higher index was found in the FCS group (P<0.001). Oestradiol concentrations in spent media were higher in the FCS group compared to other treatments (P<0.001). Leptin-stimulated nuclear oocyte maturation was significantly impaired when leptin-induced JAK2/STAT3 and MEK 1/2 activation was suppressed by the inhibitors (P<0.001). Steroid secretion of COC was not affected by leptin activation of JAK2/STAT3 or MEK 1/2 pathways. In conclusion, JAK2/STAT3 and MEK 1/2 pathways mediate the enhancement of nuclear oocyte maturation by leptin; however, neither cytoplasmic oocyte maturation nor steroidogenic response of COC were improved in the present rabbit model.
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Arias-Álvarez M, García-García R, Torres-Rovira L, González-Bulnes A, Rebollar P, Lorenzo P. Influence of hormonal and nonhormonal estrus synchronization methods on follicular and oocyte quality in primiparous lactating does at early postpartum period. Theriogenology 2010; 73:26-35. [DOI: 10.1016/j.theriogenology.2009.07.017] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/11/2009] [Revised: 07/10/2009] [Accepted: 07/12/2009] [Indexed: 11/16/2022]
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Haouzi D, Assou S, Mahmoud K, Hedon B, De Vos J, Dewailly D, Hamamah S. LH/hCGR gene expression in human cumulus cells is linked to the expression of the extracellular matrix modifying gene TNFAIP6 and to serum estradiol levels on day of hCG administration. Hum Reprod 2009; 24:2868-78. [PMID: 19625307 DOI: 10.1093/humrep/dep263] [Citation(s) in RCA: 27] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
BACKGROUND Recent studies suggest a role for luteinizing hormone and human chorionic gonadotrophin receptor (LH/hCGR) signalling in the regulation of the oocyte-cumulus oophorus cell interplay. The present study aimed at assessing the LH/hCGR gene expression in cumulus cells (CCs) surrounding oocytes in patients undergoing controlled ovarian hyperstimulation (COS) before ICSI and to relate the LH/hCGR expression to other COS quality parameters. METHODS CCs from single oocytes of normal responder patients were analysed by DNA microarrays. Concomitantly, estradiol levels on the day of hCG administration, CC morphology, total collected oocyte and metaphase II oocyte number were assessed in relation to LH/hCGR gene expression in CC. RESULTS The transcriptome analysis of CC indicated a variable expression of LH/hCGR among the patients and intra-patients. LH/hCGR mRNA expression was negatively correlated with serum estradiol level on the day of hCG administration. Eighty-five genes were significantly modulated between CCs from patients with a high and a low LH/hCGR expression. These genes are involved principally in steroid metabolism and in the ovulation process and include TNFAIP6, a gene expressed during CC-oocyte complex (COC) expansion. There were no significant differences in LH/hCGR gene expression profile between COS protocols. CONCLUSIONS LH/hCGR is expressed in CC under COS conditions. LH/hCGR expression level is associated with TNFAIP6 gene expression and negatively correlated with serum estradiol level on the day of hCG administration.
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Affiliation(s)
- D Haouzi
- Institut de Recherche en Biothérapie, CHU Montpellier, Université Montpellier I, Hôpital Saint-Eloi, Montpellier F-34000, France
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