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Engulfment of spermatozoa by cumulus cells and the role of CD36
Journal of Reproductive Immunology, 2011The function of cumulus cells after sperm penetration is not well understood. The present study examined the phagocytic action of cumulus cells on sperm after dispersion of cumulus-oocyte complexes. In a co-incubation system of cauda sperm and cumulus cells, the sperm heads were beginning to vanish after 2.5h and 77%±1.34 of sperm heads had disappeared
X Z, Yang +4 more
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Apoptosis of postovulatory cumulus granulosa cells of the rat
Anatomy and Embryology, 2000The process of apoptosis in the postovulatory cumulus granulosa cells was investigated in pregnant rats. Mature female Wistar rats, exhibiting a regular 4-day oestrous cycle, were placed with males on the day of pro-oestrus. The following day, on which spermatozoa were found in vaginal smears, was designated day 1 of pregnancy.
M, Szołtys, Z, Tabarowski, A, Pawlik
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“Cumulomics”: Mapping the equine cumulus cells' proteome
Journal of Equine Veterinary Science, 2014The cumulus accompanies the oocyte in intimate contact and represents a promising source to study metabolism during in-vitro maturation (IVM) non-invasively for the respective oocyte. Mapping of the proteome and it’s alteration during the maturation process can provide novel insights in metabolism during IVM with the potential to adjust media and ...
Walter, Jasmin +5 more
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Cumulus Oocyte Complex: Cumulus Cells Regulate Oocyte Growth and Maturation
Journal of Mammalian Ova Research, 2009Abstract: Cumulus cells directly surround oocyte to form cumulus oocyte complex (COC). Oocyte secreted factors act on cumulus cells to regulate the specific functions. Since oocytes have less glycolytic activity, the energy sources, such as piruvate or amino acid, are transferred from cumulus cells to oocyte via gap junctional communications, which are
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Theriogenology, 2018
The objectives of the present study were to evaluate the developmental competence of buffalo denuded oocytes (DOs) cocultured with cumulus cells (CCs) during in vitro maturation, and to investigate the mechanisms by which CCs promote oocyte maturation and development.
Mahmoud, Moussa +7 more
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The objectives of the present study were to evaluate the developmental competence of buffalo denuded oocytes (DOs) cocultured with cumulus cells (CCs) during in vitro maturation, and to investigate the mechanisms by which CCs promote oocyte maturation and development.
Mahmoud, Moussa +7 more
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2020 7th International Conference on Biomedical and Bioinformatics Engineering, 2020
This study aims to evaluate the viability differences on oocyte vitrification surrounded by cumulus cells and oocyte vitrification not surrounded by cumulus cells after in vitro maturation. The oocyte collection was through the aspiration technique of puncturing the 10 cc disposable syringe with 18 G needle filled with oocyte medium on follicle 2-6mm ...
A. A. Muhammad Nur Kasman +7 more
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This study aims to evaluate the viability differences on oocyte vitrification surrounded by cumulus cells and oocyte vitrification not surrounded by cumulus cells after in vitro maturation. The oocyte collection was through the aspiration technique of puncturing the 10 cc disposable syringe with 18 G needle filled with oocyte medium on follicle 2-6mm ...
A. A. Muhammad Nur Kasman +7 more
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CD52 is synthesized in cumulus cells and secreted into the cumulus matrix during ovulation.
American journal of reproductive immunology (New York, N.Y. : 1989), 2008Early studies have shown that an antibody to male reproductive tissue CD52 is a pathogenic factor of infertility. The molecule contains a unique carbohydrate antigen that induces antibodies interfering with sperm function. However, the characteristic properties of CD52 in female reproductive tissues are not known.
Akiko, Hasegawa +4 more
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Developmental Biology, 1982
Abstract The timing of the reduction of cumulus cell-oocyte coupling was correlated with oocyte meiotic maturation and the expansion (mucification) of the cumulus oophorus using immature mice treated with gonadotropins. Three hours after the injection of an ovulatory dose of human chorionic gonadotropin (hCG), more than 90% of the oocytes isolated ...
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Abstract The timing of the reduction of cumulus cell-oocyte coupling was correlated with oocyte meiotic maturation and the expansion (mucification) of the cumulus oophorus using immature mice treated with gonadotropins. Three hours after the injection of an ovulatory dose of human chorionic gonadotropin (hCG), more than 90% of the oocytes isolated ...
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A Two-Cylinder Model of Cumulus Cells and Its Application in Computing Cumulus Transports
Journal of the Atmospheric Sciences, 1980Abstract A two-cylinder model suitable for computing vertical transports in cumulus cells is formulated. The model includes explicit computation of perturbation pressure and allows the study of the evolution of raindrop size spectra. Sensitivity tests were performed to determine the response of the model to different assumptions.
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Cumulus cell processes in bovine cumulus oocyte complexes
Ultramicroscopy, 1988F. de Loos +3 more
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