Noelia Mendoza

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We recently demonstrated the presence of melatonin in ram seminal plasma and differences in its concentration in this fluid between the breeding and nonbreeding season. In this study, we investigate the hypothesis that in vitro treatment with melatonin affects ram sperm quality, and that this is reflected in the in vitro fertilization (IVF) results. Semen(More)
The aim of this study was to compare European wild boar (Sus scrofa) with chromosomal number 2n=36 to phenotypically similar animals with 2n=37 and 2n=38 chromosomes (crossbreeds) with respect to fatty acid (FA) profile and cholesterol content. According to gender and genetic group (2n=36, 2n=37, and 2n=38; seven animals each), the FA profile in(More)
Centrifugal countercurrent distribution (CCCD) in an aqueous two-phase system (TPS) is a resolute technique revealing sperm heterogeneity and for the estimation of the fertilizing potential of a given semen sample. However, separated sperm subpopulations have never been tested for their fertilizing ability yet. Here, we have compared sperm quality(More)
This study examines (1) the effectiveness of transrectal, ultrasound-guided massage of the accessory sex glands (TUMASG) combined with electroejaculation for obtaining aoudad (Ammotragus lervia sahariensis) sperm samples for cryopreservation, and (2) the effectiveness of a Tris-citric acid-glucose-based medium (TCG; usually used for freezing ibex sperm) and(More)
To provide new insights into the mechanisms through which seminal plasma proteins (SPP) are able to protect spermatozoa, we tested the hypothesis that apoptosis can contribute to the negative effect of refrigeration on ram spermatozoa, and that SPP prevent this damage. Having proved the presence of key constituents of apoptosis-related pathways in ram sperm(More)
The objectives of this study were two. First, to compare three base media with different sugar composition as an initial step to achieve a good chemically-defined extender for ram sperm refrigeration. The second one, to determine which sperm quality parameters may be more useful for revealing differences between sperm samples. One medium contained 200 mM(More)
Despite considerable cryobiology research there is no industry standard for the concentration to which ram spermatozoa should be diluted before freezing. Ram semen is highly concentrated and often frozen at a high sperm concentration, necessitating the use of small laparoscopic insemination doses. The aim of this paper was to ascertain the effect of(More)
The mitogen-activated protein kinase (MAPK), c-Jun N-terminal kinase (JNK), and p38 MAP kinase (p38) signaling cascades are involved in triggering apoptosis in somatic cells. Given that spermatozoa are able to undergo apoptosis, we tested the hypothesis that these pathways might be functional in ram spermatozoa as two signal transduction mechanisms that(More)
The current methods of isolation of adipose tissue-derived stem cells result in a heterogeneous population that might interfere with their differentiation potential and makes it difficult to compare the results between different groups. Partition in aqueous two-phase systems is one of the few techniques that separate cells on the basis of surface(More)
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