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López-Arellano P, López-Arellano K, Luna J, Flores D, Jiménez-Salazar J, Gavia G, Teteltitla M, Rodríguez JJ, Domínguez A, Casas E, Bahena I, Betancourt M, González C, Ducolomb Y, Bonilla E. Perfluorooctanoic acid disrupts gap junction intercellular communication and induces reactive oxygen species formation and apoptosis in mouse ovaries. Environ Toxicol 2019; 34:92-98. [PMID: 30277307 DOI: 10.1002/tox.22661] [Citation(s) in RCA: 44] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/25/2018] [Revised: 09/06/2018] [Accepted: 09/16/2018] [Indexed: 06/08/2023]
Abstract
Perfluorooctanoic acid (PFOA) is a member of the perfluoroalkyl acid family of compounds. Due to the presence of strong carbon-fluorine bonds, it is practically nonbiodegradable and highly persistent in the environment. PFOA has been detected in the follicular fluid of women, and positively associated with reduced fecundability and infertility. However, there are no reports concerning the experimental evaluation of PFOA on oocyte toxicity in mammals. The aim of the present study was to determine if PFOA is able to induce oxidative stress in fetal ovaries and cause apoptosis in oocytes in vitro. In addition, since inhibition of the gap junction intercellular communication (GJIC) by PFOA has been demonstrated in liver cells in vivo and in vitro, the effect of PFOA on the GJIC between the oocyte and its supportive cumulus cells was studied. Results show that PFOA induced oocyte apoptosis and necrosis in vitro (medium lethal concentration, LC50 = 112.8 μM), as evaluated with Annexin-V-Alexa 508 in combination with BOBO-1 staining. Reactive oxygen species (ROS) levels, as assessed by DCFH-DA, increased significantly in fetal ovaries exposed to ¼ LC50 (28.2 μM, a noncytotoxic and relevant occupational exposure concentration) and LC50 PFOA ex vivo. This perfluorinated compound also caused the blockage of GJIC in cumulus cells-oocyte complexes (COCs) obtained from female mice exposed in vivo, as evaluated by calcein transfer from cumulus cells to the oocyte. The ability of PFOA of disrupting the GJIC in COCs, generating ROS in the fetal ovary and causing apoptosis and necrosis in mammal's oocytes, might account for the reported association between increasing maternal plasma concentrations of PFOA with reduced fertility in women.
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Affiliation(s)
- Patricia López-Arellano
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
- Maestría en Biología de la Reproducción Animal, División de Ciencias Biológicas y de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Keila López-Arellano
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Jaquelinne Luna
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Diana Flores
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Javier Jiménez-Salazar
- Departamento de Biología de la Reproducción, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Graciela Gavia
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Mario Teteltitla
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Juan José Rodríguez
- Unidad de Investigación en Genética y Toxicología Ambiental, FES-Zaragoza, UNAM, CDMX, Mexico
| | - Alejandro Domínguez
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Eduardo Casas
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Ivan Bahena
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Miguel Betancourt
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Cristina González
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Yvonne Ducolomb
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
| | - Edmundo Bonilla
- Departamento de Ciencias de la Salud, Universidad Autónoma Metropolitana-Iztapalapa, CDMX, Mexico
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