1
|
Hallberg I, Persson S, Olovsson M, Sirard MA, Damdimopoulou P, Rüegg J, Sjunnesson YCB. Perfluorooctane sulfonate (PFOS) exposure of bovine oocytes affects early embryonic development at human-relevant levels in an in vitro model. Toxicology 2021; 464:153028. [PMID: 34762985 DOI: 10.1016/j.tox.2021.153028] [Citation(s) in RCA: 13] [Impact Index Per Article: 4.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/01/2021] [Revised: 10/20/2021] [Accepted: 11/04/2021] [Indexed: 02/02/2023]
Abstract
Perfluorooctane sulfonate (PFOS) has been added to Stockholm Convention for global phase out, but will continue to contribute to the chemical burden in humans for a long time to come due to extreme persistence in the environment. In the body, PFOS is transferred into to the ovarian follicular fluid that surrounds the maturing oocyte. In the present study, bovine cumulus oocyte complexes were exposed to PFOS during 22 h in vitro maturation. Concentrations of 2 ng g-1 (PFOS-02) representing average human exposure and 53 ng g-1 (PFOS-53) relevant to highly exposed groups were used. After exposure, developmental competence was recorded until day 8 after fertilisation. Blastocysts were fixed and either stained to evaluate blastomere number and lipid distribution using confocal microscopy or frozen and pooled for microarray-based gene expression and DNA methylation analyses. PFOS-53 delayed the first cleavage to two-cell stage and beyond at 44 h after fertilisation (p < .01). No reduction of proportion blastocysts were seen at day 8 in either of the groups, but PFOS-53 exposure resulted in delayed development into more advanced stages of blastocysts seen as both reduced developmental stage (p = .001) and reduced number of blastomeres (p = .04). Blastocysts showed an altered lipid distribution that was more pronounced after exposure to PFOS-53 (increased total lipid volume, p=.0003, lipid volume/cell p < .0001) than PFOS-02, where only decreased average lipid droplet size (p=.02) was observed. Gene expression analyses revealed pathways differently regulated in the PFOS-treated groups compared to the controls, which were related to cell death and survival through e.g., P38 mitogen-activated protein kinases and signal transducer and activator of transcription 3, which in turn activates tumour protein 53 (TP53). Transcriptomic changes were also associated with metabolic stress response, differentiation and proliferation, which could help to explain the phenotypic changes seen in the blastocysts. The gene expression changes were more pronounced after exposure to PFOS-53 compared to PFOS-02. DNA-methylation changes were associated with similar biological functions as the transcriptomic data, with the most significantly associated pathway being TP53. Collectively, these results reveal that brief PFOS exposure during oocyte maturation alters the early embryo development at concentrations relevant to humans. This study adds to the evidence that PFOS has the potential to affect female fertility.
Collapse
Affiliation(s)
- Ida Hallberg
- Department of Clinical Sciences, Division of Reproduction, The Centre for Reproductive Biology in Uppsala, Swedish University of Agricultural Sciences, SE-750 07, Uppsala, Sweden.
| | - Sara Persson
- Department of Clinical Sciences, Division of Reproduction, The Centre for Reproductive Biology in Uppsala, Swedish University of Agricultural Sciences, SE-750 07, Uppsala, Sweden
| | - Matts Olovsson
- Department of Women's and Children's Health, Uppsala University, SE-751 85, Uppsala, Sweden
| | - Marc-André Sirard
- Department of Animal Sciences, Laval University, QC G1V 0A6, Quebec, Canada
| | - Pauliina Damdimopoulou
- Division of Obstetrics and Gynaecology, Department of Clinical Science, Intervention and Technology, Karolinska Institutet and Karolinska University Hospital, SE-141 86, Stockholm, Sweden
| | - Joëlle Rüegg
- Department of Organismal Biology, Program of Environmental Toxicology, Uppsala University, SE-752 36, Uppsala, Sweden
| | - Ylva C B Sjunnesson
- Department of Clinical Sciences, Division of Reproduction, The Centre for Reproductive Biology in Uppsala, Swedish University of Agricultural Sciences, SE-750 07, Uppsala, Sweden
| |
Collapse
|
2
|
Borges MA, Sousa FSS, Paschoal JD, Lopes IAR, da S Feijó AL, Seixas Neto ACP, da Silva Pinto L, Seixas FK, Collares T. Effect of supplementation of medium with Bauhinia forficata recombinant lectins on expression of oxidative stress genes during in vitro maturation of bovine oocytes. Reprod Toxicol 2021; 103:64-70. [PMID: 34098044 DOI: 10.1016/j.reprotox.2021.05.012] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2021] [Revised: 05/28/2021] [Accepted: 05/30/2021] [Indexed: 10/21/2022]
Abstract
The lectin of Bauhinia forficata (nBfL) is a protein able to bind reversibly to N-acetylgalactosamine, performing several functions and one of them is the antiproliferative activity in tumor cells, but its effects have not yet been evaluated in female gametes. The objective of the present study was to determine the additional effect of B. forficata recombinants lectins in the medium of maturation in vitro of bovine oocytes in expression of genes related to oxidative stress pathways. To get the proteins, the gene for this recombinant lectin (rBfL) and its truncated isoform (rtBfL) were cloned and expressed in Escherichia coli (E.coli). The oocytes obtained through follicular puncture were incubated in IVM medium for 24 h containing concentrations of 10 μg/mL, 50 μg/mL and 100 μg/mL of nBfL, rBfL and rtBfL, and a no treated group as a control. In the groups treated with the concentration of 100 μg / mL, the gene expression of genes involved in oxidative stress SOD2, CAT, GPX-1, GSR, NOS2 and apoptosis BAX, CASP3 were evaluated. The rtBfL increased the expression of the SOD2, GSR and NOS2 genes and all the tested lectins increased the expression of the CASP3 gene compared to the control group. These findings indicate that the tested concentrations of the B. forficata recombinants lectins probably influence the expression of oxidative stress genes and increase the expression of the apoptotic gene CASP3 during in vitro maturation of bovine oocytes.
Collapse
Affiliation(s)
- Morgana Alves Borges
- Programa de Pós-Graduação em Biotecnologia (PPGB), Grupo de Pesquisa em Oncologia Celular e Molecular, Laboratório de Biotecnologia do Câncer, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-610, RS, Brazil
| | - Fernanda S S Sousa
- Programa de Pós-Graduação em Biotecnologia (PPGB), Grupo de Pesquisa em Oncologia Celular e Molecular, Laboratório de Biotecnologia do Câncer, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-610, RS, Brazil
| | - Júlia Damé Paschoal
- Programa de Pós-Graduação em Biotecnologia (PPGB), Grupo de Pesquisa em Oncologia Celular e Molecular, Laboratório de Biotecnologia do Câncer, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-610, RS, Brazil
| | - Isadora A R Lopes
- Programa de Pós-Graduação em Biotecnologia (PPGB), Grupo de Pesquisa em Oncologia Celular e Molecular, Laboratório de Biotecnologia do Câncer, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-610, RS, Brazil
| | - Ana Laura da S Feijó
- Programa de Pós-Graduação em Biotecnologia (PPGB), Grupo de Pesquisa em Oncologia Celular e Molecular, Laboratório de Biotecnologia do Câncer, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-610, RS, Brazil
| | - Amilton Clair Pinto Seixas Neto
- Programa de Pós-Graduação em Biotecnologia (PPGB), Laboratório de Bioinformática e Proteômica Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas (UFPel), Pelotas, RS, Brazil
| | - Luciano da Silva Pinto
- Programa de Pós-Graduação em Biotecnologia (PPGB), Laboratório de Bioinformática e Proteômica Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas (UFPel), Pelotas, RS, Brazil
| | - Fabiana Kommling Seixas
- Programa de Pós-Graduação em Biotecnologia (PPGB), Grupo de Pesquisa em Oncologia Celular e Molecular, Laboratório de Biotecnologia do Câncer, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-610, RS, Brazil
| | - Tiago Collares
- Programa de Pós-Graduação em Biotecnologia (PPGB), Grupo de Pesquisa em Oncologia Celular e Molecular, Laboratório de Biotecnologia do Câncer, Centro de Desenvolvimento Tecnológico, Universidade Federal de Pelotas, Pelotas, 96010-610, RS, Brazil.
| |
Collapse
|
3
|
Hofstetter AR, Sacco RE. Oxidative stress pathway gene transcription after bovine respiratory syncytial virus infection in vitro and ex vivo. Vet Immunol Immunopathol 2019; 219:109956. [PMID: 31706084 DOI: 10.1016/j.vetimm.2019.109956] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/03/2018] [Revised: 09/24/2019] [Accepted: 09/30/2019] [Indexed: 11/26/2022]
Abstract
Studies in mouse and lamb models indicate important roles of reactive oxygen species (ROS) in the pathology and immune response to respiratory syncytial virus (RSV). The role of ROS in bovine RSV (BRSV) infection of calves remains unclear. BRSV naturally infects calves, leading to similar disease course, micro- and macro-lesions, and symptomology as is observed in RSV infection of human neonates. Furthermore, humans, lambs, and calves, but not mice, have an active lung oxidative system involving lactoperoxidase (LPO) and the dual oxidases (DUOX) 1 and 2. To gain insight into the role of ROS in the BRSV-infected lung, we examined gene expression in infected bovine cells using qPCR. A panel of 19 primers was used to assay ex vivo and in vitro BRSV-infected cells. The panel targeted genes involved in both production and regulation of ROS. BRSV infection significantly increased transcription of five genes in bovine respiratory tract cells in vitro and ex vivo. PTGS2 expression more than doubled in both sample types. Four transcripts varied significantly in lung lesions, but not non-lesion samples, compared with uninfected lung. This is the first report of the transcriptional profile of ROS-related genes in the airway after BRSV infection in the natural host.
Collapse
Affiliation(s)
- Amelia R Hofstetter
- Ruminant Diseases and Immunology Research Unit, National Animal Disease Center, United States Department of Agriculture, 1920 Dayton Avenue, Ames, IA, 50010, United States of America.
| | - Randy E Sacco
- Ruminant Diseases and Immunology Research Unit, National Animal Disease Center, United States Department of Agriculture, 1920 Dayton Avenue, Ames, IA, 50010, United States of America.
| |
Collapse
|