Search Results - "Pérez‐Pé, R."

Semen plasma proteins prevent cold-shock membrane damage to ram spermatozoa by Pérez-Pé, R., Cebrián-Pérez, J.A., Muiño-Blanco, T.

“…Although the effect of semen plasma on the function of spermatozoa has been widely studied, results are contradictory. We showed that semen plasma proteins are…”
Get full text

Sperm survival and heterogeneity are correlated with fertility after intrauterine insemination in superovulated ewes by Grasa, P., Pérez-Pé, R., Abecia, A., Forcada, F., Muiño-Blanco, T., Cebrián-Pérez, J.A.

“…Efficient animal production involves accurate estimations of fertilizing ability. One key factor is the plasma membrane of the sperm cell, which is actively…”
Get full text

Ram Sperm Selection by a Dextran/Swim-Up Procedure Increases Fertilization Rates Following Intrauterine Insemination in Superovulated Ewes by Grasa, P, Perez-Pe, R, Baguena, O, Forcada, F, Abecia, A, Cebrian-Perez, J. A, Muino-Blanco, T

“…The objective of this study was to compare the efficacy of 2 dextran/swim‐up media to increase the sperm quality parameters and the maintenance of these…”
Get full text

Sperm-lectin agglutination combined with swim-up leads to an efficient selection of highly motile, viable and heterogeneous ram spermatozoa by Pérez-Pé, R, Martí, J.I, Tejedor, A, Muiño-Blanco, T, Cebrián-Pérez, J.A

“…Lectins, high molecular weight glycoproteins with different sugar-binding specificity, are able to agglutinate different cell types. The recovery of…”
Get full text

Surface changes of ram spermatozoa by adsorption of homologous and heterologous seminal plasma proteins revealed by partition in an aqueous two-phase system by Ollero, M, García-López, N, Pérez-Pé, R, Cebrián-Pérez, J A, Muiño-Blanco, T

“…Ram spermatozoa freed from seminal plasma by a dextran 'swim-up' procedure were incubated with Tween 20 and fractionated into motile (PEG-rich) and stationary…”
Get more information

Evidence of melatonin synthesis in the ram reproductive tract by Gonzalez‐Arto, M., Hamilton, T. R dos S., Gallego, M., Gaspar‐Torrubia, E., Aguilar, D., Serrano‐Blesa, E., Abecia, J.A., Pérez‐Pé, R., Muiño‐Blanco, T., Cebrián‐Pérez, J. A., Casao, A.

“…Summary Melatonin is a ubiquitous molecule found in a wide range of fluids, one of them being ram seminal plasma, in which it can reach higher concentrations…”
Get full text

Polymorphisms of the melatonin receptor 1A (MTNR1A) gene influence the age at first mating in autumn-born ram-lambs and sexual activity of adult rams in spring by Abecia, J.A., Mura, M.C., Carvajal-Serna, M., Pulinas, L., Macías, A., Casao, A., Pérez-Pe, R., Carcangiu, V.

“…The aim of this study was to determine whether polymorphisms of the melatonin receptor 1A (MTNR1A) gene influence the age at first mating in autumn-born…”
Get full text

Seminal Plasma Proteins and Sperm Resistance to Stress by Muiño-Blanco, T, Pérez-Pé, R, Cebrián-Pérez, JA

“…The role of seminal plasma (SP) in mammalian sperm function remains largely a matter of speculation as both inhibitory and stimulating effects have been found…”
Get full text

Underlying molecular mechanism in the modulation of the ram sperm acrosome reaction by progesterone and 17β-estradiol by Gimeno-Martos, S., Miguel-Jiménez, S., Casao, A., Cebrián-Pérez, J.A., Muiño-Blanco, T., Pérez-Pe, R.

“…•P4 and E2 induce changes in P-Tyr location in ram sperm.•P4, but not E2, increments ROS and Ca2+ levels in ram sperm.•P4 and E2 did not induce hyperactivation…”
Get full text

Proximate analysis and GC-MS phytochemical profiling of aqueous extracts of Doryopteris raddiana , a plant used by the Mbya-Guaraní as a contraceptive by Sánchez-Hernández, E, Cáceres-González, C, Peña-Delgado, V, García-Valdecasas Medina, J I, Casao, A, Valdez-Ayala, S, Pérez-Pe, R, Martín-Gil, J, Martín-Ramos, P

“…(Presl) Fée, a traditional contraceptive in Mbya culture, lacks scientific scrutiny regarding its chemical composition and contraceptive efficacy. Employing…”
Get full text

Steroid hormone receptors and direct effects of steroid hormones on ram spermatozoa by Gimeno-Martos, S, González-Arto, M, Casao, A, Gallego, M, Cebrián-Pérez, J A, Muiño-Blanco, T, Pérez-Pé, R

“…This study was based on the assumption that steroid hormones present in the female genital tract may have a rapid effect on ram spermatozoa by interaction with…”
Get full text

Melatonin in Sperm Biology: Breaking Paradigms by Cebrián‐Pérez, JA, Casao, A, González‐Arto, M, Santos Hamilton, TR, Pérez‐Pé, R, Muiño‐Blanco, T

“…Melatonin is a ubiquitous molecule, present in a wide range of organisms, and involved in multiple functions. Melatonin relays the information about the…”
Get full text

Involvement of progesterone and estrogen receptors in the ram sperm acrosome reaction by Gimeno-Martos, S., Santorromán-Nuez, M., Cebrián-Pérez, J.A., Muiño-Blanco, T., Pérez-Pé, R., Casao, A.

“…The steroid hormones 17-β estradiol (E2) and progesterone (P4) can regulate capacitation, hyperactive motility, and the acrosome reaction (AR) during the sperm…”
Get full text

Expression, cellular localization, and involvement of the pentose phosphate pathway enzymes in the regulation of ram sperm capacitation by Luna, C., Serrano, E., Domingo, J., Casao, A., Pérez-Pé, R., Cebrián-Pérez, J.A., Muiño-Blanco, T.

“…Spermatozoa require substantially more ATP than other cells, not only for sustaining sperm motility but also for regulating protein phosphorylation during…”
Get full text

Ram seminal plasma proteins contribute to sperm capacitation and modulate sperm–zona pellucida interaction by Luna, C., Colás, C., Casao, A., Serrano, E., Domingo, J., Pérez-Pé, R., Cebrián-Pérez, J.A., Muiño-Blanco, T.

“…Incubation of ram spermatozoa in capacitating conditions with cAMP-elevating agents promotes a progressive time-dependent increase in the capacitated sperm…”
Get full text

Effects of Melatonin Implants During Non-Breeding Season on Sperm Motility and Reproductive Parameters in Rasa Aragonesa Rams by Casao, A, Vega, S, Palacín, I, Pérez-Pe, R, Laviña, A, Quintín, FJ, Sevilla, E, Abecia, JA, Cebrián-Pérez, JA, Forcada, F, Muiño-Blanco, T

“…The effect of melatonin implants administered during non-breeding season in Rasa Aragonesa rams on sperm motility parameters and other reproductive traits was…”
Get full text

Seasonal differences in ram seminal plasma revealed by partition in an aqueous two-phase system by Pérez-Pé, R, Barrios, B, Muiño-Blanco, T, Cebrián-Pérez, J.A

“…Seminal plasma plays an important role in maturation of spermatozoa through hormonal, enzymatic and surface-modifying events. We have previously shown that…”
Get full text

Study of apoptosis-related markers in ram spermatozoa by Martí, E., Pérez-Pé, R., Colás, C., Muiño-Blanco, T., Cebrián-Pérez, J.A.

“…Certain features of capacitated or frozen–thawed spermatozoa have been considered to be an apoptosis-like phenomenon, and, it has been suggested that the…”
Get full text

Quality characteristics and fertilizing ability of ram sperm subpopulations separated by partition in an aqueous two-phase system by Mendoza, N., Casao, A., Del Valle, I., Serrano, E., Nicolau, S., Asumpção, M.E.O.A., Muiño-Blanco, T., Cebrián-Pérez, J.A., Pérez-Pé, R.

“…► CCCD differentiates sperm subpopulations of different quality characteristics. ► These include apoptotic changes and capacitation state. ► Sperm recovered…”
Get full text

Effects of 17-β estradiol and progesterone on ram sperm functionality by Gimeno, S., Del Molino, L., Casao, A., Cebrián-Pérez, J.A., Muiño-Blanco, T., Pérez-Pé, R.

Get full text