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Abstract:

Since the regression of the corpus luteum (CL) occurs via a tightly controlled apoptotic process, studies were designed to determine if local administration of the antiapoptotic agent sphingosine 1-phosphate (S1P) effectively blocks the luteolytic action of prostaglandin F-2alpha (PGF-2α). On day 19 of pregnancy, 2 hr before systemic PGF-2α administration, rats were injected intrabursa with either S1P or vehicle (control). The activity of four caspases, which contribute to the initial (caspase-2, -8, and -9) and final (caspase-3) events in apoptosis was measured in pooled CL from four individual ovaries at 0 and 4 hr after PGF-2α injection. The expression of the phosphorylated form of AKT (pAKT) and tumor necrosis factor-alpha (TNF-α) was analyzed by ELISA. In addition, cell death was evaluated by electronic microscopy (EM) in CL 4 and 36 hr after PGF-2α injection. The activity of caspase-2, -3, and -8 was significantly greater by 4 hr after PGF-2α, but not caspase-9 activity. In contrast, expression of pAKT and TNF-α decreased significantly. Administration of S1P suppressed (P < 0.05) these effects, decreasing caspase activities and increasing pAKT and TNF-α expression. The administration of S1P also significantly decreased the percentage of luteal apoptotic cells induced by PGF-2α. PGF-2α treatment increased the prevalence of luteal cells with advanced signs of apoptosis (i.e., multiple nuclear fragments, chromatin condensation, or apoptotic bodies). S1P treatment suppressed these changes and increased the blood vessel density. These results suggest that S1P blocks the luteolytic effect of the PGF-2α by decreasing caspase-2, -3, and -8 activities and increasing AKT phosphorylation and TNF-α expression. © 2009 Wiley-Liss, Inc.

Registro:

Documento: Artículo
Título:Local effects of the sphingosine 1-phosphate on prostaglandin F2alpha-induced luteolysis in the pregnant rat
Autor:Hernandez, F.; Peluffo, M.C.; Bas, D.; Stouffer, R.L.; Tesone, M.
Filiación:Instituto de Biología Y Medicina Experimental (IBYME), CONICET, Buenos Aires, Argentina
Division of Reproductive Sciences, Oregon National Primate Research Center, Oregon Health and Science University, Beaverton, OR, United States
Departamento de Química Biológica, Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Buenos Aires, Argentina
Palabras clave:caspase 2; caspase 8; caspase 9; progesterone; prostaglandin F2 alpha; protein kinase B; sphingosine 1 phosphate; tumor necrosis factor alpha; animal cell; animal experiment; animal tissue; article; cell death; controlled study; corpus luteum; drug effect; electron microscopy; enzyme activity; enzyme linked immunosorbent assay; female; luteolysis; nonhuman; pregnancy; priority journal; protein expression; protein phosphorylation; rat; Rattus
Año:2009
Volumen:76
Número:12
Página de inicio:1153
Página de fin:1164
DOI: http://dx.doi.org/10.1002/mrd.21083
Título revista:Molecular Reproduction and Development
Título revista abreviado:Mol. Reprod. Dev.
ISSN:1040452X
CODEN:MREDE
CAS:caspase 2, 182372-14-1; caspase 8; caspase 9, 180189-96-2; progesterone, 57-83-0; prostaglandin F2 alpha, 551-11-1; protein kinase B, 148640-14-6; sphingosine 1 phosphate, 26993-30-6
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_1040452X_v76_n12_p1153_Hernandez

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Citas:

---------- APA ----------
Hernandez, F., Peluffo, M.C., Bas, D., Stouffer, R.L. & Tesone, M. (2009) . Local effects of the sphingosine 1-phosphate on prostaglandin F2alpha-induced luteolysis in the pregnant rat. Molecular Reproduction and Development, 76(12), 1153-1164.
http://dx.doi.org/10.1002/mrd.21083
---------- CHICAGO ----------
Hernandez, F., Peluffo, M.C., Bas, D., Stouffer, R.L., Tesone, M. "Local effects of the sphingosine 1-phosphate on prostaglandin F2alpha-induced luteolysis in the pregnant rat" . Molecular Reproduction and Development 76, no. 12 (2009) : 1153-1164.
http://dx.doi.org/10.1002/mrd.21083
---------- MLA ----------
Hernandez, F., Peluffo, M.C., Bas, D., Stouffer, R.L., Tesone, M. "Local effects of the sphingosine 1-phosphate on prostaglandin F2alpha-induced luteolysis in the pregnant rat" . Molecular Reproduction and Development, vol. 76, no. 12, 2009, pp. 1153-1164.
http://dx.doi.org/10.1002/mrd.21083
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Hernandez, F., Peluffo, M.C., Bas, D., Stouffer, R.L., Tesone, M. Local effects of the sphingosine 1-phosphate on prostaglandin F2alpha-induced luteolysis in the pregnant rat. Mol. Reprod. Dev. 2009;76(12):1153-1164.
http://dx.doi.org/10.1002/mrd.21083