Browsing by Subject "Preimplantation"

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    El Convenio de Oviedo y su adecuación a las nuevas técnicas de intervención del genoma humano.
    (Universidad de Murcia, Servicio de Publicaciones, 2020) Jiménez González, Joaquín
    El Convenio de Oviedo, habiendo supuesto un avance esencial en el derecho internacional de consenso en materia de derechos humanos y biomedicina, veintitrés años después necesita adecuarse a los nuevos avances científicos respecto a las técnicas de intervención de la línea germinal humana. Aceptando que éstas forman parte ya del contexto social, científico y jurídico de nuestra época, y que alguna de ellas necesita aún un intenso debate sobre su aplicación, como las técnicas de edición del genoma, analizamos en el presente trabajo cuales son las modificaciones que consideramos oportunas para que la norma incluya esta realidad y ofrezca mayor seguridad jurídica respecto a estas técnicas.
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    Seminal Plasma Modifies the Transcriptional Pattern of the Endometrium and Advances Embryo Development in Pigs
    (2019-12-18) Martínez, Cristina A.; Cambra, Josep M.; Parrilla, Inmaculada; Roca, Jordi; Ferreira-Dias, Graça; Pallarés, Francisco J.; Lucas, Xiomara; Vázquez, Juan M.; Martínez, Emilio A.; Gil, María A.; Rodríguez-Martínez, Heriberto; Cuello, Cristina; Álvarez-Rodríguez, Manuel; Medicina y Cirugía Animal
    Background: Seminal plasma (SP) promotes sperm survival and fertilizing capacity, and potentially affects embryo development, presumably via specific signaling pathways to the internal female genital tract. Objectives: This study evaluated how heterologous SP, infused immediately before postcervical artificial insemination (AI) affected embryo development and the transcriptional pattern of the pig endometria containing embryos. Materials and Methods: Postweaning estrus sows (n = 34) received 40-mL intrauterine infusions of either heterologous pooled SP or Beltsville Thawing Solution (BTS; control) 30 min before AI of semen extended to 10% of homologous SP. Embryos (all sows) and endometrium samples (3 sows/group) were removed during laparotomy 6 days after the infusion of SP or BTS to morphologically evaluate the embryos to determine their developmental stage and to analyze the endometrial transcriptome using microarrays (PORGENE 1.0 ST GeneChip array, Affymetrix) followed by qPCR for further validation. Results: Embryo viability was equal between the groups (~93%), but embryo development was significantly (P < 0.05) more advanced in the SP-treated group compared to control. A total of 1,604 endometrium transcripts were differentially expressed in the SP group compared to the control group. An enrichment analysis showed an overrepresentation of genes and pathways associated with the immune response, cytokine signaling, cell cycle, cell adhesion, and hormone response, among others. Conclusions: SP infusions prior to AI positively impacted the preimplantation embryo development and altered the expression of the endometrial genes and pathways potentially involved in embryo development.