The presence of corpus luteum may have a negative impact on in vitro developmental competency of bovine oocytes

Hajarian, Hadi; Shahsavari, Mohammad Hamed; Karamishabankareh, Hamed; Dashtizad, Mojtaba

doi:10.1016/j.repbio.2015.12.007

Cited by 19 publications

(19 citation statements)

References 34 publications

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“…The impact of progesterone in mammalian oocyte maturation related to expansion of cumulus cells and oocyte quality before or after ovulation has not been fully established. A report from Hajarian et al (2016) indicates that the presence of a CL in the ovary may have negative effects on developmental competence of ipsilateral oocytes, as COCs from their ICL group yielded a lower percentage of cleavage and blastocyst formation, when compared to the CCL group. Similarly, Islam et al (2007) also indicates that COCs of superior quality may be obtained from CL-absent ovaries, while Chian et al (2002) reports similar rates of oocyte maturation and fertilization in COCs from ovaries with or without a CL.…”

Section: Discussionmentioning

confidence: 99%

“…The presence of a CL affects in a negative way estradiol concentration as well as quantity and quality of follicles (Penitente-Filho et al 2014). Additionally, several authors point out the negative effect of the presence of a CL (Hajarian et al 2016) or progesterone (Silva and Knight 2000;Shimada and Terada 2002) on the competence of oocytes and the subsequent proportion of embryos forming blastocysts, when compared with oocytes from ovaries without CL or in the absence of progesterone. On the other hand, Hendriksen et al (2004) indicate that oocytes from subordinate follicles show reduced developmental competence when a dominant follicle is present (effect of inhibin) and suggest a beneficial effect of progesterone on the quality of oocytes, when a CL is also present in the ovary.…”

Section: Introductionmentioning

confidence: 99%

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Effect of presence of corpora lutea on cumulus expansion of in vitro matured bovine oocytes selected by trypan blue and brilliant cresyl blue tests

Quezada‐Casasola

Martínez-Armendáriz²,

Itzá-Ortíz

et al. 2018

Journal of Applied Animal Research

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Trypan Blue (TB) and Brilliant Cresyl Blue (BCB) are used to select and determine viability and competence of oocytes, however, the effects of corpora lutea on cumulus expansion during in vitro maturation are still undetermined. Cumulus-oocytes complexes (COCs) from ovaries with ipsilateral (ICL), contralateral (CCL) and without corpora lutea in either ovary (OCL) were selected by visual examination, TB and BCB staining, and matured in vitro to evaluate cumulus expansion. The overall percentage of visually selected COCs was similar in ICL, CCL and OCL (P > 0.05). Proportions of live and mature COCs were similar in all groups (P > 0.05). The overall percentage of BCB+ COCs was 70.1%. BCB+ ICL COCs had less cumulus expansion (60.5%) than BCB+ CCL and OCL COCs (75.7 and 71.4%, respectively; P < 0.01). BCB− ICL COCs had less cumulus expansion (20.0%) than BCB− CCL and OCL (39.7 and 46.1%; P < 0.01). BCB+ CCL and OCL COCs showed the highest cumulus expansion index (P < 0.01). Presence of corpus luteum in the ovary affects negatively cumulus cells expansion. TB and BCB staining facilitate the selection of oocytes with higher degrees of cumulus expansion.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of presence of corpora lutea on cumulus expansion of in vitro matured bovine oocytes selected by trypan blue and brilliant cresyl blue tests

Quezada‐Casasola

Martínez-Armendáriz²,

Itzá-Ortíz

et al. 2018

Journal of Applied Animal Research

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“…Overall, these studies indicate that the presence of a dominant follicle in the bovine ovary has a negative impact on subsequent embryo development, while the presence of a CL favors oocyte competence. In contrast, more recent studies indicate that the presence of a CL has negative effects on the developmental competence of ipsilateral oocytes [21,22]. However, this ''negative'' effect does not influence the competence of oocytes originated from large follicles (10-20 mm) as much as those derived from small and medium follicles (<9 mm) [22].…”

Section: Ovarian Morphologymentioning

confidence: 99%

Oocyte Selection for in Vitro Embryo Production in Livestock Species: Non-Invasive Approaches for the New Challenges of Oocyte Competence

Águila¹,

Treulén²,

Therrien³

et al. 2020

Preprint

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The efficiency of producing embryos using in vitro technologies in livestock species rarely exceeds the 30 to 40% threshold, indicating that the proportion of oocytes that fail to develop after in vitro fertilization and culture is considerably large. Considering that the intrinsic quality of the oocyte is one of the main factors affecting blastocyst yield, the precise identification of non-invasive cellular or molecular markers that predict oocyte competence is of major interest to research and practical applications. The aim of this review was to explore the current literature on different non-invasive markers associated with oocyte quality in mammalian species, with an emphasis on the bovine model. Apart from some controversial findings, the presence of cycle-related structures in ovaries, a follicle size between 6 and 10 mm, large number of surrounding cumulus cells, slightly expanded investment without dark areas, large oocyte diameter (&gt;120 microns), dark cytoplasm, and the presence of a round and smooth first polar body have been associated to better competence. In addition, the combination of oocyte and zygote selection by BCB test and spindle imaging have the potential to further optimize the identification of oocytes with better developmental competence for in vitro-derived technologies in livestock species.

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“…Assim, visando aperfeiçoar essas etapas e aumentar ainda mais o sucesso da PIVE, vários estudos têm sido realizados avaliando fatores relacionados desde os momentos iniciais de colheita oocitária, a fim de obter oócitos em quantidade e qualidade adequados (Barbosa, Toniollo, & Guimarães, 2013), até as etapas finais de desenvolvimento embrionário (Zullo et al, 2016). Nesse contexto, alguns fatores podem influenciar a qualidade e competência de oócitos imaturos, incluindo características intrínsecas da fêmea, normalmente relacionadas a parâmetros fisiológicos ovarianos, como a presença do corpo lúteo e estádio do ciclo estral (Hajarian, Shahsavari, Karami-Shabankareh, & Dashtizad, 2016).…”

Section: Introductionunclassified

“…A presença ou ausência do CL na superfície ovariana têm se mostrado um critério de seleção macroscópico para recuperação de oócitos em bovinos (Pirestani et al, 2011;Hajarian et al, 2016), bubalinos (El-Naby et al, 2013) e ovinos (Davachi, Kohram, & Zeinoaldini, 2013). Contudo, os resultados com relação à influência do CL sobre a qualidade oocitária ainda são controversos (Penitente-Filho et al, 2015).…”

Section: Introductionunclassified

Influência Do Corpo Lúteo Sobre a Recuperação De Oócitos Imaturos Bovinos Derivados De Fêmeas Post-Mortem

Santos

Neta

Borges

et al. 2017

HOLOS

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RESUMOO objetivo do presente trabalho foi avaliar a influência do corpo lúteo (CL), glândula endócrina temporária presente nos ovários, sobre a recuperação de oócitos imaturos bovinos derivados de ovários de fêmeas postmortem. Para tanto, as seguintes comparações foram realizadas: fêmeas não prenhes com CL vs. fêmeas não prenhes sem CL; fêmeas prenhes com CL vs. fêmeas não prenhes com CL; e ovário com CL vs. ovário sem CL. Assim, ovários foram obtidos em abatedouro e os oócitos recuperados por aspiração folicular. A qualidade oocitária foi avaliada por morfologia convencional e ensaio de azul cresil brilhante (ACB), sendo quantificados oócitos viáveis e não viáveis para cada técnica. Todos os dados foram analisados pelo teste de Fisher (P<0,05). Assim, avaliando fêmeas ou ovários com ou sem CL, nenhuma diferença foi observada nos parâmetros avaliados. Contudo, um maior percentual de oócitos viáveis por morfologia foi obtido de fêmeas prenhes com CL, quando comparado às fêmeas não prenhes com CL. Em conclusão, pode-se afirmar que parâmetros de recuperação e qualidade oocitária não são afetados pela presença de CL, exceto em doadoras prenhes que apresentaram oócitos de melhor qualidade. PALAVRAS-CHAVE:azul de cresil brilhante, competência oocitária, morfologia convencional. INFLUENCE OF THE CORPUS LUTEUM ON THE RECOVERY OF BOVINE IMMATURE OOCYTES DERIVED FROM POST-MORTEM FEMALES ABSTRACTThe aim of the present study was to evaluate the influence of the corpus luteum (CL), temporary endocrine gland present on the ovaries, on the recovery of bovine immature oocytes derived from ovaries of post-mortem females. Thun, the following comparisons were performed: non-pregnant females with CL vs. females not-pregnant without CL; pregnant females with CL vs. not-pregnant females with CL; and ovary with CL vs. ovary without CL. So, ovaries were obtained in slaughterhouse and the oocytes recovered by follicular aspiration. The oocyte quality was evaluated by conventional morphology and brilliant cresyl blue assay (BCB), and viable and non-viable oocytes were quantified for each technique. All data were analyzed by Fisher test (P<0.05). Thus, evaluating females or ovaries with or without CL, no difference was observed in the evaluated parameters. Nevertheless, a higher percentage of viable oocytes by morphology were obtained from pregnant females with CL comparing nonpregnant females with CL. In conclusion, it can be stated that it is possible that recovery parameters and oocyte quality are not affected by the presence of CL, except in pregnant donors who presented oocytes of better quality.

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The presence of corpus luteum may have a negative impact on in vitro developmental competency of bovine oocytes

Cited by 19 publications

References 34 publications

Effect of presence of corpora lutea on cumulus expansion of in vitro matured bovine oocytes selected by trypan blue and brilliant cresyl blue tests

Effect of presence of corpora lutea on cumulus expansion of in vitro matured bovine oocytes selected by trypan blue and brilliant cresyl blue tests

Oocyte Selection for in Vitro Embryo Production in Livestock Species: Non-Invasive Approaches for the New Challenges of Oocyte Competence

Influência Do Corpo Lúteo Sobre a Recuperação De Oócitos Imaturos Bovinos Derivados De Fêmeas Post-Mortem

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