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AVS

Animal & Veterinary Science

Agricultural Sciences Bldg.
Phone: (208) 885-6345
avs-students@uidaho.edu

Mailing Address:
Animal & Veterinary Science
University of Idaho
875 Perimeter Drive MS 2330
Moscow, ID 83844-2330

Tracy Davis

Tracy Davis, Ph.D.


Office: Ag BioTech Bldg. Rm. 211
Phone: (208) 885-5189
Email: tracyd@uidaho.edu
Mailing Address: Animal and Veterinary Science
875 Perimeter Dr. MS 2330
Moscow , Idaho 83844-2330

College of Agricultural and Life Sciences
Assistant Professor

Campus Locations: Moscow
With UI Since 2007

  • Research/Focus Areas
    • Reproductive Biology/Endocrinology
  • Biography

    Ph.D, Reproductive Biology, Ohio State University, Columbus, OH, 2004

    M.S. A.S. Reproductive Physiology, University of Nebraska, Lincoln, NE, 2000

    B.S. Animal Science,  Michigan State University, East Lansing, MI, 1998

    Post Doctoral Fellow, Animal Reproduction and Biotechnology Lab., Colorado State University, 2004-2007

  • Selected Publications

    Refereed Journals 

    Dindia L, Murray J, Faught E, Davis TL, Leonenko Z, Vijayan MM. Novel nongenomic signaling by glucocorticoid may involve changes to liver membrane order in rainbow trout. PLoS One. 2012: 7(10):e48859.

    Vanderwall DK, Rasmussen DM, Carnahan KG, Davis TL. Effect of administration of
    oxytocin during diestrus on corpus luteum function and endometrial oxytocin
    receptor concentration in cycling mares. Journal of Equine Veterinary Science.
    (in press)

    Davis TL, Whitesell JD, Cantlon JD, Clay CM, Nett TM. Does a nonclassical signaling mechanism underlie an increase of estradiol-mediated gonadotropin-releasing hormone receptor binding in ovine pituitary cells? Biol Reprod 2011; 85:770-778.

    Powers JG, Baker DL, Davis TL, Conner MM, Lothridge AH, Nett TM. Effects of gonadotropin-releasing hormone immunization on reproductive function and behavior in captive female Rocky Mountain elk (Cervus elaphus nelsoni). Biol Reprod 2011; 85:1152-1160.

    Davis TL
    *, Bott RC, Slough TL, Bruemmer JE, Niswender GD. Progesterone inhibits oxytocin-and prostaglandin F2alpha-stimulated increases in intracellular calcium concentrations in small and large ovine luteal cells. Biol Reprod, 2010; 82: 282-288. ***A portion of the data was completed as an Asst. Professor at UI. *Corresponding Author.

    Nagler JJ, Davis TL, Modi N, Vijayan MM, Schultz I. Intracellular, not membrane, estrogen receptors control vitellogenin synthesis in the rainbow trout. Gen Gomp Endocrinol 2010; 167:326-330.

    Weems YS, Nett TM, Rispoli LA, Davis TL, Johnson DL, Uchima T, Raney A, Lennon E, Pang J, Harbert T, Bowers G, Goto K, Ong A, Tsutahara N, Randel RD, Weems CW. Prostaglandin E(1) (PGE(1)), but not rostaglandin E(2) (PGE(2)), alters luteal and endometrial luteinizing hormone (LH) occupied and unoccupied LH receptors and mRNA for LH receptors in ovine luteal tissue to prevent luteoloysis. Prostaglandins Other Lipid Mediat, 2010; 91: 42-50.

    Weems YS, Nett TM, Rispoli LA, Davis TL, Johnson DL, Uchima T, Raney A, Lennon E, Harbert T, Bowers G, Randel RD, Weems CW. Effects of prostaglandin E and F receptor agonists in vivo on luteal function in ewes. Prostaglandins Other Lipid Mediat, 2010; 92:67-72.

    Davis TL, Bott RC, Slough TL, Bruemmer JE, Niswender GD. Progesterone inhibits oxytocin- and prostaglandin F2-stimulated increases in intracellular calcium concentrations in small and large ovine luteal cells. Biol Reprod (in press).

    Nagler JJ, Davis TL, Modi N, Vijayan MM, Schultz I. Nuclear, not membrane, estrogen receptor control of vitellogenin synthesis in the rainbow trout (Oncorhynchus mykiss). (submitted)


    Abstracts

    Nguyen G, Meyer C, Spencer J, Davis T. Is receptor internalization required for the rapid effects of estradiol? INBRE Conference, August 2 – 4, 2010, Moscow, ID.

    Robison T, Perry KY, Carnahan KG, Davis TL, Ahmadzadeh A. Comparison of three doses of prostaglandin F2a in a 5-day CIDR-based synchronization protocol in beef cows. ADSA/ASAS Joint meeting, 2010 Abstract T268

    Nett T, Arevalo-Arreguin A., and Davis T. Nongenomic actions of estrogen directly on the ovine pituitary facilitates LH secretion. J Anim Sci 2009: 87; E-Suppl.2 (abstract 562).

  • Research Projects
    My research focus currently is on the role of estradiol on the function of gonadotrope cells in the anterior pituitary. The gonadotrope cells elease luteinizing hormone (LH) and follicle stimulating hormone (FSH), which are responsible for regulating gonadal function.

    My laboratory is trying to understand the mechanisms by which estradiol has both positive and negative effects on gonadotrope function. Moreover, we are interested in examining the potential cross-talk between estradiol and gonadotropin-releasing hormone, the master regulator of reproduction, in regulating gonadotropes.

    We recently have shown that the immortalized mouse gonadotrope cell lines are not valid models to study estrogenic effects on gonadotrope function. Therefore, a number of molecular approaches will be utilized to characterize gene expression and regulatory mechanisms using sheep pituitary cells. Once the genes of interest are determined in vitro, we hope to ablate expression of these genes within the anterior pituitary to examine the effects on secretion of LH/FSH and the impact on ovarian function. 

    I am also excited to begin research in a different direction addressing factors which affect luteal function in dairy cattle. Luteal insufficiency is thought to be a main factor in early embryonic loss. Hopefully the studies we undertake will provide better insight to improving luteal function to support the early embryo to maintain pregnancy in dairy cows.