Pro-caspase-3 is constitutively expressed in luteinized granulosa cells from women undergoing controlled ovarian stimulation for in vitro fertilization.

Autor: Almeida CP; Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Brazil., Silveira CO; Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Brazil; Fertibaby, Belo Horizonte, Brazil., Ferreira EF; Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Brazil., Ferreira MC; Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Belo Horizonte, Brazil., Oliveira GG; Fertibaby, Belo Horizonte, Brazil., Veloso ES; Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Brazil., Silva FHS; Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Brazil., Coelho SS; Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Brazil., Moraes LM; Fertibaby, Belo Horizonte, Brazil., Reis FM; Department of Obstetrics and Gynecology, Federal University of Minas Gerais, Belo Horizonte, Brazil. Electronic address: fmreis@ufmg.br., Del Puerto HL; Department of General Pathology, Federal University of Minas Gerais, Belo Horizonte, Brazil.
Jazyk: angličtina
Zdroj: Acta histochemica [Acta Histochem] 2021 Feb; Vol. 123 (2), pp. 151670. Date of Electronic Publication: 2020 Dec 25.
DOI: 10.1016/j.acthis.2020.151670
Abstrakt: Apoptosis regulation in luteinized granulosa cells (LGC) during assisted reproduction procedures is still controversial. Caspase-3 is a major apoptosis mediator encoded by CASP3 and formed through cleavage of its precursor pro-caspase-3. The aim of this study was to investigate the expression patterns of pro-caspase-3 (mRNA and protein) and cleaved caspase-3 in human LGC. Thirty-five women undergoing controlled ovarian stimulation for in vitro fertilization were prospectively enrolled in the study. LGC were isolated from follicular fluid during oocyte pickup and evaluated by immunocytochemistry for pro-caspase-3 and cleaved caspase-3, and by real-time PCR for CASP3 mRNA expression. We found a positive staining of pro-caspase-3 in 77 % of the LGC (95 % confidence interval [CI] 60%-84%), whereas cleaved caspase-3 was found in only 4% of the cells (95 % CI 3%-6%). The abundance of cells expressing pro-caspase-3 was independent from CASP3 mRNA levels (r = 0.24, p = 0.255) and did not correlate with the amount of cleaved caspase-3 (r = -0.24, p = 0.186). Multivariable logistic regression showed that pro-caspase-3 positivity was not influenced by clinical characteristics such as age, cause or length of infertility, antral follicle count or hormonal drugs used to induce ovulation. These findings suggest that pro-caspase-3 is constitutively expressed in LGC, allowing quick cleavage into active caspase-3 and apoptosis triggering whenever needed in the course of gonadotropin-induced follicular development.
(Copyright © 2020 Elsevier GmbH. All rights reserved.)
Databáze: MEDLINE
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