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McLean MK, Geary TW, Zezeski AL, Smith MF, Spencer TE, Pohler KG, Reese ST, Perry GA. Impact of preovulatory estradiol concentrations on subsequent luteal function in beef cattle. Syst Biol Reprod Med 2022; 68:286-297. [PMID: 35394393 DOI: 10.1080/19396368.2022.2038717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
It has been hypothesized that circulating concentrations of estradiol during the preovulatory period, can impact subsequent progesterone concentrations. Ovulation was synchronized in nonlactating beef cows (n = 53). Cows that exhibited estrus before gonadotrophin-releasing hormone (GnRH)-induced ovulation (d 0) had greater (p<.01) peak concentrations of estradiol compared with cows that did not express estrus (11.5 ± 0.8 vs. 6.2 ± 0.6 pg/mL), respectively, but there was no difference in ovulatory follicle size (p= .80) or interval from GnRH2 to ovulation (p=.23). Circulating concentrations of progesterone during luteal formation (d 3-7; p=.70 and p=.77) or mid-luteal phase (d 8-14; p=.39 and p=.12) were not affected by elevated periovulatory estradiol or an interaction with day. To investigate the direct influence of estradiol on luteal function, ovulation (d 0) was synchronized in nonlactating beef cows and cows were allocated to three groups (control, n = 5; vehicle injection, n = 4; or an estradiol antagonist (Fulvestrant; ICI 182,780), n = 4. Intrafollicular injection of vehicle (100 µL) or an estradiol antagonist (25 μg Fulvestrant in 100 µL) into the largest follicle occurred on d -2. Concentrations of estradiol increased (p<.0001) from d -2 to 0 but did not differ among groups (p>.50). Furthermore, plasma concentrations of progesterone on d 0 through 20 were not affected by treatment (p=.86). These results indicate that elevated preovulatory estradiol before ovulation was not required to prepare granulosa cells for luteinization or subsequent luteal progesterone secretion but did tend to impact luteal lifespan.
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Affiliation(s)
| | - Thomas W Geary
- USDA-ARS, Fort Keogh Livestock and Range Research Lab, Miles City, MT, USA
| | - Abby L Zezeski
- USDA-ARS, Fort Keogh Livestock and Range Research Lab, Miles City, MT, USA
| | | | | | - Ky G Pohler
- Texas A&M University, College Station, TX, USA
| | | | - George A Perry
- Texas A&M AgriLife Research and Extension Center, Overton, TX, USA
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2
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Afedi PA, Larimore EL, Cushman RA, Raynie D, Perry GA. iTRAQ-based proteomic analysis of bovine pre-ovulatory plasma and follicular fluid. Domest Anim Endocrinol 2021; 76:106606. [PMID: 33784582 DOI: 10.1016/j.domaniend.2021.106606] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 09/28/2020] [Revised: 01/05/2021] [Accepted: 01/16/2021] [Indexed: 11/26/2022]
Abstract
Bovine follicular fluid (FF) creates a unique microenvironment in follicles necessary for follicle growth, oocyte maturation, and estradiol (E2) production. The objective of this study was to analyze changes in proteins in FF and plasma (PL) from animals with high E2 (HE2) or low E2 (LE2) during the preovulatory period. Beef cows were synchronized, and follicular dynamics and ovulatory response were monitored using transrectal ultrasonography. Nine cows were selected and slaughtered, blood samples were collected at slaughter and FF was aspirated from dominant follicles (DF; >10 mm). Abundant proteins (albumin, IgG, IgA, and alpha-1-antitrypsin) were depleted from both PL and FF. Peptides were labeled with iTRAQ reagents and quantified using 2-dimentional liquid chromatography ESI-based mass spectrometry. Estradiol was associated with protein changes in PL and FF. Protein expression changes between FF HE2 and FF LE2 were greater than between PL HE2 and PL LE2. There were 15 up-regulated proteins and 10 down-regulated proteins in FF HE2 compared to FF LE2, and 7 proteins up-regulated and 9 proteins down-regulated in PL HE2 compared to PL LE2. Several of the differentially expressed proteins function in follicle development and were mainly categorized under cellular process and metabolic process. Pathway analysis identified the up- and down-regulated proteins were predominantly associated with the complement and coagulation cascades. The data demonstrate E2 regulates a wide range of reproductive associated proteins in bovine PL and FF and can provide the basis for further investigation of specific processes involved in such regulation.
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Affiliation(s)
- P A Afedi
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, USA
| | - E L Larimore
- Department of Animal Science, South Dakota State University, Brookings, SD, USA
| | - R A Cushman
- USDA-ARS, U.S. Meat Animal Research Center, Clay Center, NE 68933, USA
| | - D Raynie
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, SD, USA
| | - G A Perry
- Department of Animal Science, South Dakota State University, Brookings, SD, USA.
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Afedi PA, Larimore EL, Cushman RA, Raynie D, Perry GA. iTRAQ-Based proteomic dataset for bovine pre-ovulatory plasma and follicular fluid containing high and low Estradiol. Data Brief 2021; 36:106998. [PMID: 33869699 PMCID: PMC8047177 DOI: 10.1016/j.dib.2021.106998] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2021] [Revised: 03/16/2021] [Accepted: 03/22/2021] [Indexed: 11/05/2022] Open
Abstract
This is isobaric tags for a relative and absolute quantification (iTRAQ)-Based Proteomic Data on bovine plasma (PL) and follicular fluid (FF) containing high and low pre-ovulatory circulating concentration of estradiol (E2). The PL and FF were collected from nine beef cows that were identified to initiate a new follicular wave on day -4 during synchronization. Follicular dynamics and ovulatory response were monitored using transrectal ultrasonography. Blood samples were collected at slaughter and FF was aspirated from dominant follicles (DF; >10 mm). Estradiol concentrations in PL and FF were measured by radioimmunoassays. Plasma and FF were labeled as containing high E2 (PL HE2 and FF HE2) or low E2 (PL LE2 and FF LE2). Abundant proteins (albumin, IgG, IgA, and alpha-1-antitrypsin) were depleted from the four PL and FF samples. Peptides were labeled with iTRAQ reagents and analyzed using 2-dimentional liquid chromatography ESI-based mass spectrometry. Proteins were identified and quantified using SEQUESTTM search engine embedded in Proteome Discoverer. The proteins matched with at least one unique peptide at minimum 95% confidence were considered positive identifications. Protein expression levels were determined by assigned fold change of >2.0 or <0.5 between any pair from the four sample types. The paired comparisons made were PL HE2 and PL LE2, FF HE2 and FF LE2, PL HE2 and FF HE2, and PL LE2 and FF LE2. Protein Analysis Through Evolutionary Relationships (PANTHER) and Database for Annotation, Visualization and Integrated Discovery (DAVID) were used to classify protein functions. This dataset includes the overview of workflow for identification and quantification of proteins and details on 231 proteins identified which includes 103 up- and down-regulate proteins. This dataset can be useful for further probing of the identified regulated proteins to better understand folliculogenesis and ovulation, particularly in bovine. This dataset is related to the article ‘iTRAQ-Based Proteomic Analysis of Bovine Pre-ovulatory Plasma and Follicular Fluid’ by P. A. Afedi, E. L. Larimore, R. A. Cushman, D. Raynie, G. A. Perry. Domestic Animal Endocrinology. https://doi.org/10.1016/j.domaniend.2021.106606
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Affiliation(s)
- P A Afedi
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, South Dakota, USA
| | - E L Larimore
- Department of Animal Science, South Dakota State University, Brookings, South Dakota, USA
| | - R A Cushman
- USDA-ARS U.S. Meat Animal Research Center, Clay Center, Nebraska 68933, USA
| | - D Raynie
- Department of Chemistry and Biochemistry, South Dakota State University, Brookings, South Dakota, USA
| | - G A Perry
- Department of Animal Science, South Dakota State University, Brookings, South Dakota, USA
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Perry GA, Cushman RA, Perry BL, Schiefelbein AK, Northrop EJ, Rich JJJ, Perkins SD. Role of preovulatory concentrations of estradiol on timing of conception and regulation of the uterine environment in beef cattle. Syst Biol Reprod Med 2019; 66:12-25. [PMID: 31813287 DOI: 10.1080/19396368.2019.1695979] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Abstract
The ability to induce ovulation with an injection of GnRH facilitated the development of fixed-time artificial insemination (AI) protocols. However, animals that exhibit estrus prior to fixed-time AI have greater pregnancy success. Thus, the objectives of the present experiments were to determine the impact of estrus expression prior to fixed-time AI on timing of conception and to characterize the role of preovulatory estradiol in regulating changes in expression of uterine genes. In experiment 1, data were collected from 4,499 beef cows inseminated by fixed-time AI in 31 different herds. Animals that did not conceive to AI but exhibited estrus before timed-AI were more likely to conceive during cycle 1 after AI, and overall conceived earlier in the breeding season compared to animals that did not exhibit estrus. In experiment 2, beef cows were synchronized using a fixed-time AI protocol. Uterine horn biopsies and blood samples were collected on Day 0, 5, 10, or 16. Concentrations of estradiol on Day 0 did not influence expression of progesterone receptor, ER beta, or oxytocin receptor. Increased concentrations of estradiol on Day 0 increased expression of ER alpha from Days 0 to 5 of the estrous cycle. Furthermore, cows with increased concentrations of estradiol on Day 0 had increased expression of inhibin beta A, and uterine milk protein precursor. Thus, animals that do not exhibit estrus prior to fixed-time AI had decreased breeding season pregnancy success and conceived later in the breeding season, and preovulatory concentrations of estradiol likely play a major role in this establishment of pregnancy, not only directly by regulating uterine gene expression, but also indirectly throughout the subsequent estrous cycle.
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Affiliation(s)
- George A Perry
- Department of Animal Science, South Dakota State University, Brookings, SD, USA
| | | | - Brandi L Perry
- Department of Animal Science, South Dakota State University, Brookings, SD, USA
| | | | - Emmalee J Northrop
- Department of Animal Science, South Dakota State University, Brookings, SD, USA
| | - Jerica J J Rich
- Department of Animal Science, South Dakota State University, Brookings, SD, USA
| | - Stephanie D Perkins
- Department of Animal Science, South Dakota State University, Brookings, SD, USA
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Rich JJJ, Northrop EJ, Larimore EL, Perry GA. Influence of GnRH supplementation at CIDR removal on estrus expression and interval to estrus in beef cattle. Theriogenology 2018; 119:76-79. [PMID: 29982139 DOI: 10.1016/j.theriogenology.2018.06.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/10/2018] [Revised: 06/25/2018] [Accepted: 06/29/2018] [Indexed: 10/28/2022]
Abstract
Previous research has indicated that multiple small doses of GnRH following CIDR removal increased circulating concentrations of estradiol. Therefore, our objective was to determine if a single small dose of GnRH (5 μg or 10 μg) at CIDR removal would impact expression of estrus and/or interval to estrus. Beef cows and heifers (n = 1620; n = 1057 cows, n = 563 heifers) were synchronized using the 7-day CO-Synch + CIDR protocol, and randomly assigned to one of three treatments (0, 5, or 10 μg of a GnRH analog at CIDR removal). Animals were inseminated following detection in estrus. Interval to estrus was calculated for each animal that exhibited estrus (INTERVAL 1). Animals that did not exhibit estrus were administered 100 μg of GnRH at the time of AI and their interval to estrus was designated at 120 h (INTERVAL 2). There was a treatment by age interaction (P = 0.05) on INTERVAL 1. Heifers treated with 5 μg of GnRH tended to have a shorter interval to estrus (P = 0.07; 47 ± 1.4 h) compared to 0 μg (50 ± 1.5 h) and did have a shorter interval compared to 10 μg (P < 0.01; 52 ± 1.5 h). There were no differences between treatments in interval to estrus among cows (P > 0.34). When animals that did not exhibit estrus by 120 h were included in the analysis there was no treatment by age interaction (P = 0.49). This is likely due to the fact that treatment (P < 0.01), but not age (P = 0.96) or treatment by age (P = 0.74) influenced expression of estrus. In addition, there tended to be a treatment by estrus interaction (P = 0.08) on pregnancy success. There was no difference in pregnancy success between treatments among animals that exhibited estrus (P > 0.30). In summary, 5 μg of GnRH at CIDR removal tended to decrease the interval to estrus and increased expression of estrus among heifers but not cows, and 10 μg of GnRH at CIDR removal did not improve estrus expression and lengthened the interval to estrus in comparison to the control.
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Affiliation(s)
- Jerica J J Rich
- Department of Animal Science, South Dakota State University, Brookings, SD, 57007, USA.
| | - Emmalee J Northrop
- Department of Animal Science, South Dakota State University, Brookings, SD, 57007, USA.
| | - Erin L Larimore
- Department of Animal Science, South Dakota State University, Brookings, SD, 57007, USA.
| | - George A Perry
- Department of Animal Science, South Dakota State University, Brookings, SD, 57007, USA.
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Northrop EJ, Rich JJJ, Cushman RA, McNeel AK, Soares ÉM, Brooks K, Spencer TE, Perry GA. Effects of preovulatory estradiol on uterine environment and conceptus survival from fertilization to maternal recognition of pregnancy†. Biol Reprod 2018; 99:629-638. [DOI: 10.1093/biolre/ioy086] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/18/2017] [Accepted: 04/15/2018] [Indexed: 01/17/2023] Open
Affiliation(s)
- Emmalee J Northrop
- Department of Animal Science, South Dakota State University, Brookings, South Dakot, USA
| | - Jerica J J Rich
- Department of Animal Science, South Dakota State University, Brookings, South Dakot, USA
| | - Robert A Cushman
- USDA, ARS, Roman L. Hruska US Meat Animal Research Center, Clay Center, Nebraska, USA
| | - Anthony K McNeel
- USDA, ARS, Roman L. Hruska US Meat Animal Research Center, Clay Center, Nebraska, USA
| | - Émerson M Soares
- Animal Science Department, Federal University of Santa Maria, Santa Maria, Rio Grande do Sul, Brazil
| | - Kelsey Brooks
- Division of Animal Sciences, University of Missouri, Columbia, Missouri, USA
| | - Thomas E Spencer
- Division of Animal Sciences, University of Missouri, Columbia, Missouri, USA
| | - George A Perry
- Department of Animal Science, South Dakota State University, Brookings, South Dakot, USA
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