This subproject is one of many research subprojects utilizing the resources provided by a Center grant funded by NIH/NCRR. The subproject and investigator (PI) may have received primary funding from another NIH source, and thus could be represented in other CRISP entries. The institution listed is for the Center, which is not necessarily the institution for the investigator. Progesterone (P) is produced by the corpus luteum (CL) and is absolutely required to maintain early pregnancy in primates. In non-conception cycles, P secretion from the CL must cease (functional regression) to allow for the initiation of the next ovarian cycle. A high rate of cholesterol uptake within the CL occurs via low density lipoprotein receptor and scavenger receptor B1 to accommodate its significant level of P production (~40 mg daily). This high rate of uptake has to be closely balanced with efflux (also known as reverse cholesterol transport) to ensure that the cytotoxic effects of excessive cholesterol do not occur. Cholesterol efflux occurs as a result of the transfer of intracellular cholesterol via the ATP-binding cassette subfamily members A1 (ABCA1) and G1 (ABCG1) to extracellular acceptor apolipoproteins, which in turn, leads to the formation of high density lipoprotein particles. The expression of genes encoding proteins involved in cholesterol uptake and efflux are tightly controlled by the nuclear hormone receptors known as liver X receptors (LXR) alpha and beta. Both LXR isoforms are activated upon binding various oxysterols, cholesterol metabolites that serve as indicators of intracellular cholesterol levels. Thus, LXRs serve as cholesterol sensors that stimulate cholesterol efflux in cases of cholesterol excess. The objective of this project is to assess the level of endogenous LXR ligands, the oxysterols, within the rhesus macaque CL during the course of functional regression, and to determine whether luteal cell LXR activation affects cholesterol uptake and efflux, thereby leading to changes in P output.

Agency
National Institute of Health (NIH)
Institute
National Center for Research Resources (NCRR)
Type
Primate Research Center Grants (P51)
Project #
5P51RR000163-51
Application #
8173259
Study Section
Special Emphasis Panel (ZRR1-CM-8 (01))
Project Start
2010-05-01
Project End
2011-04-30
Budget Start
2010-05-01
Budget End
2011-04-30
Support Year
51
Fiscal Year
2010
Total Cost
$47,603
Indirect Cost
Name
Oregon Health and Science University
Department
Type
Schools of Medicine
DUNS #
096997515
City
Portland
State
OR
Country
United States
Zip Code
97239
Blue, Steven W; Winchell, Andrea J; Kaucher, Amy V et al. (2018) Simultaneous quantitation of multiple contraceptive hormones in human serum by LC-MS/MS. Contraception 97:363-369
Jeon, Sookyoung; Li, Qiyao; Rubakhin, Stanislav S et al. (2018) 13C-lutein is differentially distributed in tissues of an adult female rhesus macaque following a single oral administration: a pilot study. Nutr Res :
Slayden, Ov Daniel; Friason, Francis Kathryn E; Bond, Kise Rosen et al. (2018) Hormonal regulation of oviductal glycoprotein 1 (OVGP1; MUC9) in the rhesus macaque cervix. J Med Primatol 47:362-370
Okoye, Afam A; Hansen, Scott G; Vaidya, Mukta et al. (2018) Early antiretroviral therapy limits SIV reservoir establishment to delay or prevent post-treatment viral rebound. Nat Med 24:1430-1440
Jensen, Jeffrey T; Hanna, Carol; Mishler, Emily et al. (2018) Effect of menstrual cycle phase and hormonal treatments on evaluation of tubal patency in baboons. J Med Primatol 47:40-45
Toro, C A; Aylwin, C F; Lomniczi, A (2018) Hypothalamic epigenetics driving female puberty. J Neuroendocrinol 30:e12589
Bulgarelli, Daiane L; Ting, Alison Y; Gordon, Brenda J et al. (2018) Development of macaque secondary follicles exposed to neutral red prior to 3-dimensional culture. J Assist Reprod Genet 35:71-79
Prola-Netto, Joao; Woods, Mark; Roberts, Victoria H J et al. (2018) Gadolinium Chelate Safety in Pregnancy: Barely Detectable Gadolinium Levels in the Juvenile Nonhuman Primate after in Utero Exposure. Radiology 286:122-128
Moccetti, Federico; Brown, Eran; Xie, Aris et al. (2018) Myocardial Infarction Produces Sustained Proinflammatory Endothelial Activation in Remote Arteries. J Am Coll Cardiol 72:1015-1026
Dissen, G A; Adachi, K; Lomniczi, A et al. (2017) Engineering a gene silencing viral construct that targets the cat hypothalamus to induce permanent sterility: An update. Reprod Domest Anim 52 Suppl 2:354-358

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