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Role of inflammatory pathways on embryonic competence and cryotolerance

Grant number: 19/18415-9
Support Opportunities:Scholarships in Brazil - Doctorate
Effective date (Start): December 01, 2019
Effective date (End): July 03, 2022
Field of knowledge:Agronomical Sciences - Veterinary Medicine - Animal Reproduction
Principal Investigator:Mateus José Sudano
Grantee:Roniele Santana Valente
Host Institution: Centro de Ciências Naturais e Humanas (CCNH). Universidade Federal do ABC (UFABC). Ministério da Educação (Brasil). Santo André , SP, Brazil
Associated scholarship(s):22/00764-0 - Is the NF-ºB signaling pathway important for embryo development and quality?, BE.EP.DR

Abstract

One of the main challanges to further expansion of in vitro produced of embryos is its reduced cryosurvival. When exposed to stressful situations, cells develop self-defense mechanisms that, under exacerbated conditions, can lead to cell death. NF-KB (nuclear factor kappa B) is an inducible transcription factor known to be a regulator of inflammatory cellular response and the development of defense mechanisms against a wide variety of stimuli, controlling the expression of numerous target genes. In order to elucidate the participation of NF-kB in embryonic survival mechanisms, bovine embryos will be produced in vitro with the supplementation of NF-kB modulating agents, TNF (tumor necrosis factor) inducer, IL-13 (Interleukin 13) inhibitor, the association of both (IL-13 + TNF), and subsequently compared to a control group. Embryonic development rates, relative abundance of inflammatory genes transcripts and oxidative stress will be evaluated. Blastocysts will be evaluated for cell viability (Tunel) and protein expression of NF-Kb, IKB±, CASP3 and 8-OxoG by imonofluorescence.The culture medium will be quantified for the presence of inflammatory interleukins. Secondly, the same variables will be evaluated in embryos treated with IL-13 and control subjected to stress conditions (cold and presence of H2O2) during culture. Finally, the cryotolerance of vitrified control and IL-13 treated embryos will be evaluated in two different situations: in the embryonic development medium and in the reculture medium after warming. For statistical analysis, univariate data models will be used, assuming a significance level of 5%. (AU)

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Scientific publications
(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)
MARSICO, THAMIRIS VIEIRA; SILVA, MARA VIANA; VALENTE, RONIELE SANTANA; ANNES, KELLY; RISSI, VITOR BRAGA; GLANZNER, WERNER GIEHL; SUDANO, MATEUS JOSE. Unraveling the Consequences of Oxygen Imbalance on Early Embryo Development: Exploring Mitigation Strategies. ANIMALS, v. 13, n. 13, p. 18-pg., . (19/17796-9, 18/21496-8, 19/18415-9, 20/08826-9)
MARSICO, THAMIRIS VIEIRA; VALENTE, RONIELE SANTANA; ANNES, KELLY; OLIVEIRA, ANDRESSA MINOZZO; SILVA, MARA VIANA; SUDANO, MATEUS JOSE. Species-specific molecular differentiation of embryonic inner cell mass and trophectoderm: A systematic review. Animal Reproduction Science, v. 252, p. 11-pg., . (19/17796-9, 18/21496-8, 20/08826-9, 22/02139-5, 19/18415-9)
VALENTE, RONIELE SANTANA; MARSICO, THAMIRIS VIEIRA; SUDANO, MATEUS JOSE. Basic and applied features in the cryopreservation progress of bovine embryos. Animal Reproduction Science, v. 239, p. 8-pg., . (18/21496-8, 19/17796-9, 19/18415-9)

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