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Type: Journal article
Title: Glucose deprivation, oxidative stress and peroxisome proliferator-activated receptor-α (PPARA) cause peroxisome proliferation in preimplantation mouse embryos
Other Titles: Glucose deprivation, oxidative stress and peroxisome proliferator-activated receptor-alpha (PPARA) cause peroxisome proliferation in preimplantation mouse embryos
Author: Jansen, S.
Cashman, K.
Thompson, J.
Pantaleon, M.
Kaye, P.
Citation: Reproduction, 2009; 138(3):493-505
Publisher: Bio Scientifica Ltd
Issue Date: 2009
ISSN: 1470-1626
Statement of
Sarah Jansen, Kara Cashman, Jeremy G. Thompson, Marie Pantaleon, and Peter L. Kaye
Abstract: Ex vivo two-cell mouse embryos deprived of glucose in vitro can develop to blastocysts by increasing their pyruvate consumption; however, zygotes when glucose-deprived cannot adapt this metabolic profile and degenerate as morulae. Prior to their death, these glucose-deprived morulae exhibit upregulation of the H+-monocarboxylate co-transporter SLC16A7 and catalase, which partly co-localize in peroxisomes. SLC16A7 has been linked to redox shuttling for peroxisomal β-oxidation. Peroxisomal function is unclear during preimplantation development, but as a peroxisomal transporter in embryos, SLC16A7 may be involved and influenced by peroxisome proliferators such as peroxisome proliferator-activated receptor-{alpha} (PPARA). PCR confirmed Ppara mRNA expression in mouse embryos. Zygotes were cultured with or without glucose and with the PPARA-selective agonist WY14643 and the developing embryos assessed for expression of PPARA and phospho-PPARA in relation to the upregulation of SLC16A7 and catalase driven by glucose deprivation, indicative of peroxisomal proliferation. Reactive oxygen species (ROS) production and relationship to PPARA expression were also analysed. In glucose-deprived zygotes, ROS was elevated within 2 h, as were PPARA expression within 8 h and catalase and SLC16A7 after 12–24 h compared with glucose-supplied embryos. Inhibition of ROS production prevented this induction of PPARA and SLC16A7. Selective PPARA agonism with WY14643 also induced SLC16A7 and catalase expression in the presence of glucose. These data suggest that glucose-deprived cleavage stage embryos, although supplied with sufficient monocarboxylate-derived energy, undergo oxidative stress and exhibit elevated ROS, which in turn upregulates PPARA, catalase and SLC16A7 in a classical peroxisomal proliferation response.
Keywords: Cells, Cultured; Peroxisomes; Blastocyst; Animals; Mice, Inbred CBA; Mice; Reactive Oxygen Species; Pyrimidines; Catalase; Glucose; Monocarboxylic Acid Transporters; PPAR alpha; Peroxisome Proliferators; Gene Expression Regulation, Developmental; Oxidative Stress; Female; Embryo, Mammalian
RMID: 0020092814
DOI: 10.1530/REP-09-0038
Appears in Collections:Obstetrics and Gynaecology publications

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