147 Meiotic competence of oocytes obtained from seasonally anovulatory mares treated with estradiol and sulpiride

2022 ◽  
Vol 34 (2) ◽  
pp. 311
Author(s):  
M. Vetter ◽  
C. Pinto ◽  
V. Bailey ◽  
B. Gilbert ◽  
E. Oberhaus
Keyword(s):  
Meiotic Competence

scholarly journals Disruption of female reproductive function by endotoxins

Reproduction ◽  
2018 ◽  
Vol 155 (4) ◽  
pp. R169-R181 ◽  
Author(s):  
K L Bidne ◽  
M J Dickson ◽  
J W Ross ◽  
L H Baumgard ◽  
A F Keating
Keyword(s):  
Intestinal Barrier ◽  
Reproductive Function ◽  
Chemical Exposure ◽  
Female Reproduction ◽  
Environmental Chemical ◽  
Luteal Function ◽  
Abiotic Stressors ◽  
Negative Impacts ◽  
Meiotic Competence ◽  
Metabolic Endotoxemia

Endotoxemia can be caused by obesity, environmental chemical exposure, abiotic stressors and bacterial infection. Circumstances that deleteriously impact intestinal barrier integrity can induce endotoxemia, and controlled experiments have identified negative impacts of lipopolysaccharide (LPS; an endotoxin mimetic) on folliculogenesis, puberty onset, estrus behavior, ovulation, meiotic competence, luteal function and ovarian steroidogenesis. In addition, neonatal LPS exposures have transgenerational female reproductive impacts, raising concern about early life contacts to this endogenous reproductive toxicant. Aims of this review are to identify physiological stressors causing endotoxemia, to highlight potential mechanism(s) by which LPS compromises female reproduction and identify knowledge gaps regarding how acute and/or metabolic endotoxemia influence(s) female reproduction.

Cytochalasin B-induced pseudo-cleavage of mouse oocytes in vitro. II. Studies of the mechanism and morphological consequences of pseudocleavage

1977 ◽  
Vol 26 (1) ◽  
pp. 323-337
Author(s):  
P.M. Wassarman ◽  
T.E. Ukena ◽  
W.J. Josefowicz ◽  
G.E. Letourneau ◽  
M.J. Karnovsky
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Cytochalasin B ◽  
Oocyte Size ◽  
Contractile Ring ◽  
Subsequent Formation ◽  
Mouse Oocytes ◽  
Meiotic Competence ◽  
Scanning Electron

Mouse oocytes are induced by cytochalasin B to undergo ‘pseudocleavage’ in vitro into 2 compartments, only one of which possesses microvilli. It has been found that this particular response to cytochalasin B is related to oocyte size and, possibly, to the acquisition of meiotic competence by the oocyte during its growth phase. Certain of the morphological events which characterize pseudocleavage have been determined using transmission and scanning electron microscopy. These events include: (i) an initial withdrawal of microvilli from the surface of the oocyte, together with the concomitant disappearance of microfilaments normally associated with the microvilli; (ii) the subsequent formation of a pseudocleavage furrow and contractile ring; and (iii) the reappearance of microvilli and associated microfilaments in one of the two resulting oocyte compartments. These changes in surface architecture are reflected in the distribution of fluorescein-conjugated lectins bound to the oocyte surface during pseudocleavage.

scholarly journals Meiotic Competence of Equine Oocytes and Pronucleus Formation after Intracytoplasmic Sperm Injection (ICSI) as Related to Granulosa Cell Apoptosis1

2003 ◽  
Vol 68 (6) ◽  
pp. 2065-2072 ◽  
Author(s):  
Maria Elena Dell'Aquila ◽  
Maria Albrizio ◽  
Filippo Maritato ◽  
Paolo Minoia ◽  
Katrin Hinrichs
Keyword(s):  
Granulosa Cell ◽  
Intracytoplasmic Sperm Injection ◽  
Meiotic Competence

Influence of Fusarium-toxin contaminated feed on initial quality and meiotic competence of gilt oocytes

2006 ◽  
Vol 22 (1) ◽  
pp. 44-50 ◽  
Author(s):  
H. Alm ◽  
K.-P. Brüssow ◽  
H. Torner ◽  
J. Vanselow ◽  
W. Tomek ◽  
...  
Keyword(s):  
Fusarium Toxin ◽  
Meiotic Competence

Meiotic competence and acetylation pattern of UV light classified mouse antral oocytes after meiotic arrest with isobutylmethylxanthine

2007 ◽  
Vol 74 (5) ◽  
pp. 591-599 ◽  
Author(s):  
Safiriyu Idowu Ola ◽  
Qiang Wang ◽  
Jun-Shu Ai ◽  
Shen Yin ◽  
Cheng-Guang Liang ◽  
...  
Keyword(s):  
Uv Light ◽  
Meiotic Arrest ◽  
Meiotic Competence ◽  
Acetylation Pattern
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