The objective of the Sheep Core is to provide a mechanism whereby the services of common personnel are shared by all projects of this Program Project Grant, enabling cost-effective breeding and animal maintenance programs of exceptionally high standards. The underlying rationale for this Core is simple. A staff of well-qualified individuals can meet the needs of multiple research projects more effectively and economically than if each project were to meet its needs separately. This is especially important given that a major function of this core will be to generate sheep that have been programmed prenatally by exposure to gonadal steroids at known stages of pregnancy. This requires extensive experience and expertise of managing fertility, breeding, and early postnatal care in this experimental species.
The Specific Aims of the Sheep Core are as follows.
Specific Aim 1. To operate a breeding program to generate sheep those are prenatally treated with gonadal steroids at specific fetal ages and vehicle-treated controls for use by the three research projects that make up this Program Project Grant.
Specific Aim 2. To coordinate effective and economical usage of sheep by three interrelated research projects.
Specific Aim 3. To provide a uniform and high standard of animal maintenance and veterinary care.
Specific Aim 4. To provide a technical knowledge base for reproductive research in sheep and train personnel in proper handling of animals.
Specific Aim 5. To determine the metabolic status of the experimental animals required for meeting the needs of all 3 projects. By achieving these aims, the Sheep Core will greatly enhance the productivity of all projects in the Program Project Grant.

National Institute of Health (NIH)
Eunice Kennedy Shriver National Institute of Child Health & Human Development (NICHD)
Research Program Projects (P01)
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Special Emphasis Panel (ZHD1-DSR-L)
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University of Michigan Ann Arbor
Ann Arbor
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Puttabyatappa, Muraly; Irwin, Ashleigh; Martin, Jacob D et al. (2018) Developmental Programming: Gestational Exposure to Excess Testosterone Alters Expression of Ovarian Matrix Metalloproteases and Their Target Proteins. Reprod Sci 25:882-892
Puttabyatappa, Muraly; Padmanabhan, Vasantha (2018) Ovarian and Extra-Ovarian Mediators in the Development of Polycystic Ovary Syndrome. J Mol Endocrinol 61:R161-R184
Puttabyatappa, Muraly; Lu, Chunxia; Martin, Jacob D et al. (2018) Developmental Programming: Impact of Prenatal Testosterone Excess on Steroidal Machinery and Cell Differentiation Markers in Visceral Adipocytes of Female Sheep. Reprod Sci 25:1010-1023
Puttabyatappa, Muraly; Padmanabhan, Vasantha (2018) Developmental Programming of Ovarian Functions and Dysfunctions. Vitam Horm 107:377-422
Puttabyatappa, Muraly; Andriessen, Victoria; Mesquitta, Makeda et al. (2017) Developmental Programming: Impact of Gestational Steroid and Metabolic Milieus on Mediators of Insulin Sensitivity in Prenatal Testosterone-Treated Female Sheep. Endocrinology 158:2783-2798
Puttabyatappa, Muraly; Padmanabhan, Vasantha (2017) Prenatal Testosterone Programming of Insulin Resistance in theĀ Female Sheep. Adv Exp Med Biol 1043:575-596
Hakim, Christopher; Padmanabhan, Vasantha; Vyas, Arpita K (2017) Gestational Hyperandrogenism in Developmental Programming. Endocrinology 158:199-212
Recabarren, S E; Recabarren, M; Sandoval, D et al. (2017) Puberty arises with testicular alterations and defective AMH expression in rams prenatally exposed to testosterone. Domest Anim Endocrinol 61:100-107
Cardoso, Rodolfo C; Veiga-Lopez, Almudena; Moeller, Jacob et al. (2016) Developmental Programming: Impact of Gestational Steroid and Metabolic Milieus on Adiposity and Insulin Sensitivity in Prenatal Testosterone-Treated Female Sheep. Endocrinology 157:522-35
Lu, Chunxia; Cardoso, Rodolfo C; Puttabyatappa, Muraly et al. (2016) Developmental Programming: Prenatal Testosterone Excess and Insulin Signaling Disruptions in Female Sheep. Biol Reprod 94:113

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