Sara Chigioni

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Oocyte cryopreservation in carnivores can significantly improve assisted reproductive technologies in animal breeding and preservation programs for endangered species. However, the cooling process severely affects the integrity and the survival of the oocyte after thawing and may irreversibly compromise its subsequent developmental capability. In the(More)
The domestic dog could be a valuable model for studying and developing assisted reproduction in taxonomically related endangered Canids. However, the efficiency of in vitro oocyte maturation is very low in this species compared to that of other mammalian species and this limits the development of reproductive biotechnologies, such as in vitro embryo(More)
Information about the mechanisms of meiotic arrest and resumption of meiosis in feline oocytes is still limited. The aim of this study was to investigate the effect of the presence of gonadotropins during IVM, on meiotic progression in relation to the status of gap junction mediated communications between oocyte and cumulus cells, to the cAMP intracellular(More)
Doppel (Dpl) protein is a recently identified prion-like protein. Although Dpl might be expressed in the brain after prion gene deletion, in both human and mice Dpl is normally expressed only in testis and spermatozoa, where it appears to be involved in male fertility. Little information is available so far about the expression pattern of Dpl in bovines,(More)
The aims were to evaluate the suitability of a non-commercial TRIS-lecithin (LC) extender and the effect of different concentrations of catalase (CAT) on motility, capacitation status (Chlortetracycline-assay) and zona pellucida (ZP) binding capacity of canine spermatozoa stored at +5 degrees C for 4 days. The sperm-rich fractions of the ejaculates of four(More)
Increased availability of canine embryos would be desirable to develop research and to apply assisted reproductive technologies in the treatment of infertility and in the improvement of reproductive performances in valuable Canids, both domestic and non-domestic. Embryo production through in vitro fertilization and nuclear transfer has been technically(More)
In vitro maturation (IVM) of carnivore oocytes is still under investigation. It is well known that oocytes must accomplish nuclear and cytoplasmic maturation to acquire developmental competence. However, little is known about mechanisms regulating these events in carnivore oocytes. Consequently, IVM rates are still lower than those obtained in other(More)
The aim of this study was to investigate the effects of culture in isolated oviducts relative to meiotic maturation, the time required to resume meiosis and the viability of the canine oocytes. For this purpose, cumulus-oocyte complexes and isthmus-ampullar tracts of the oviducts were collected from bitches undergoing ovariohysterectomies and destined to(More)
Effects of growth hormone on oocyte in vitro maturation and its localization in the canine cumulus-oocyte complexes S. Chigioni & C. Secchi & V. Borromeo & S. Modina & M. S. Beretta & G. C. Luvoni Published online: 7 August 2008 # Springer Science + Business Media B.V. 2008
To evaluate whether the in vitro incubation of spermatozoa with myoinositol may improve the fertilization rate in ICSI cycles. This is a prospective, bicentric, randomized study on 500 MII sibling oocytes injected in 78 ICSI cycles performed between March and October 2013. Randomization of the oocytes into two groups was performed at the time of the(More)
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