title: Multidrug resistance transporter-1 and breast cancer resistance protein protect against ovarian toxicity, and are essential in ovarian physiology.
abstract: Ovarian protection from chemotoxicity is essential for reproductive health. Our objective is to determine the role of ATP-dependent, Multidrug Resistance Transporters (MDRs) in this protection. Previously we identified MDR-dependent cytoprotection from cyclophosphamide in mouse and human oocytes by use of MDR inhibitors. Here we use genetic deletions in MDR1a/b/BCRP of mice to test MDR function in ovarian somatic cells and find that mdr1a/b/bcrp-/- mice had significantly increased sensitivity to cyclophosphamide. Further, estrus cyclicity and follicle distribution in mdr1a/b/bcrp-/- mice also differed from age-matched wildtype ovaries. We found that MDR gene activity cycles through estrus and that MDR-1b cyclicity correlated with 17β-estradiol surges. We also examined the metabolite composition of the ovary and learned that the mdr1a/b/bcrp-/- mice have increased accumulation of metabolites indicative of oxidative stress and inflammation. We conclude that MDRs are essential to ovarian protection from chemotoxicity and may have an important physiological role in the ovary.
authors.affiliation: Department of Obstetrics and Gynecology, Division of Reproductive Endocrinology and Infertility, Women & Infants Hospital of Rhode Island, Alpert Medical School of Brown University, 101 Dudley Street, Providence, RI 02905, USA. Electronic address: Lynae_Brayboy@brown.edu.
authors.forename: Lynae M
authors.initials: LM
authors.lastname: Brayboy
authors.affiliation: Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI 02912, USA.
authors.forename: Nathalie
authors.initials: N
authors.lastname: Oulhen
authors.affiliation: Brown University, Providence, RI 02912, USA.
authors.forename: Sokunvichet
authors.initials: S
authors.lastname: Long
authors.affiliation: Alpert Medical School of Brown University, USA.
authors.forename: Niesha
authors.initials: N
authors.lastname: Voigt
authors.affiliation: Department of Obstetrics and Gynecology, Women and Infants Hospital of Rhode Island, Providence, RI, USA.
authors.forename: Christina
authors.initials: C
authors.lastname: Raker
authors.affiliation: Department of Molecular Biology, Cell Biology and Biochemistry, Brown University, Providence, RI 02912, USA. Electronic address: rhet@brown.edu.
authors.forename: Gary M
authors.initials: GM
authors.lastname: Wessel
mesh_terms: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1 / Q000235:genetics / Q000378:metabolism*; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2 / Q000235:genetics / Q000378:metabolism*; D000818:Animals; D002470:Cell Survival / Q000187:drug effects; D003520:Cyclophosphamide / Q000633:toxicity; D004958:Estradiol; D004971:Estrus / Q000378:metabolism; D005260:Female; D007166:Immunosuppressive Agents / Q000633:toxicity; D008822:Mice, Transgenic; D010053:Ovary / Q000187:drug effects / Q000378:metabolism*
chemical_list: D020168:ATP Binding Cassette Transporter, Subfamily B, Member 1; D000070997:ATP Binding Cassette Transporter, Subfamily G, Member 2; C501412:Abcg2 protein, mouse; D007166:Immunosuppressive Agents; D004958:Estradiol; D003520:Cyclophosphamide
keywords: ATP binding cassette (ABC); Chemotoxicity; Multidrug resistance transporter (MDR); Oocyte; Ovary; P-Glycoprotein