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Maeda T, Kitahara G, Osawa T. Comparison of serum concentrations of pregnancy-associated glycoproteins and estrone sulphate during pregnancy in eutocia and dystocia beef cattle. Vet J 2024; 305:106147. [PMID: 38810930 DOI: 10.1016/j.tvjl.2024.106147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2024] [Revised: 04/05/2024] [Accepted: 05/23/2024] [Indexed: 05/31/2024]
Abstract
Preventing dystocia can stabilise beef cattle management. This study aimed to investigate the relationship between serum pregnancy-associated glycoproteins (PAGs) S-N values and estrone sulphate (E1S) concentrations during pregnancy and the calf birth weight in beef cattle and to evaluate their usefulness as new predictive parameters for dystocia due to foetal overgrowth. Thirty-eight pregnant Japanese Black cattle were used. Blood samples were collected at 40, 70, 100, 150, 200, 250, 280, and 285 days after artificial insemination (AI), and birth weight of the offspring was measured. Serum PAGs S-N values and E1S concentrations were measured, and the area under the curve (AUC) and the ratio of change based on 70 days after AI were calculated, followed by calculation of the correlation coefficient with the birth weight of the offspring and comparison between the eutocia (n = 32) and dystocia (n = 6) groups. The birth weight of the offspring was moderately positively correlated with the AUC of serum PAGs S-N values and E1S concentrations in the second (r = 0.425, P < 0.01) and third (r = 0.595, P < 0.01) trimesters, respectively. The ratio of change in serum E1S concentrations between 70 and 280 days after AI was greater (P < 0.05) in the dystocia group (1276.6 ± 229.1 %) than in the eutocia group (852.6 ± 69.6 %). These results suggest that blood PAGs S-N values at mid-pregnancy (100-199 days after AI) and the ratio of changes in blood E1S concentrations between 70 and 280 days after AI may be new parameters for predicting dystocia.
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Affiliation(s)
- T Maeda
- Miyakonojyo Livestock Clinic, Miyazaki Agricultural Mutual Aid Association, Miyakonojyo, Miyazaki, Japan
| | - G Kitahara
- Laboratory of Theriogenology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Japan
| | - T Osawa
- Laboratory of Theriogenology, Department of Veterinary Sciences, Faculty of Agriculture, University of Miyazaki, Japan.
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2
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Rocha CC, Martins T, Silva FACC, Sponchiado M, Pohler KG, Binelli M. Viperin (RSAD2) gene expression in peripheral blood mononuclear cells of pregnant crossbred beef cows is altered by Bos indicus genetics. Theriogenology 2023; 209:226-233. [PMID: 37437340 DOI: 10.1016/j.theriogenology.2023.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/26/2023] [Revised: 07/03/2023] [Accepted: 07/04/2023] [Indexed: 07/14/2023]
Abstract
The expression of interferon (IFN) stimulated genes (ISGs) in lymphocytes has been used for pregnancy diagnosis in cattle. However, among-cow variability has yielded sub-optimal predictive accuracy. We hypothesized that the expression of ISGs (ISG15, OAS1, RSAD2, CLEC3B, and AKR1B1) in early pregnancy varies according to the proportion of Bos indicus (B. indicus) genetics on females. Multiparous cows were classified in three genetic groups, High Angus (HA; n = 45 [0-33% Brahman influence]), Angus-Brahman (AB; n = 30 [34-67%]), and High Brahman (HB; n = 19 [68-100%]) and submitted to a Select-Synch + CIDR protocol. Cows that displayed estrus (n = 94) were artificially inseminated (Day0; D0). On D19, blood samples were collected to obtain peripheral blood mononuclear cells (PBMC) and measure progesterone (P4) concentrations. On D30, pregnancy diagnosis was performed. The expression of RSAD2 in PBMC of pregnant cows was positively related to the proportion of B. indicus genetics of the groups, but not the expression of ISG15 and OAS1. In pregnant cows, the proportion of B. indicus genetics was negatively associated to circulating levels of P4 concentrations. The P4 concentrations were related positively with RSAD2 expression. ROC curve results determined that for cattle with B. indicus genetics lower than 67%, the CLEC3B and AKR1B1 combination was the most accurate option to predict the outcome of pregnancy. In cows with more than 68% of B. indicus genetics, RSAD2 provided the best accuracy. In conclusion, there is a relationship between the proportion of B. indicus genetics and the ISGs gene expression in PBMC during pregnancy.
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Affiliation(s)
| | - Thiago Martins
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA; Department of Animal and Dairy Sciences and Brown Loam Experiment Station, Mississippi State University, Raymond, MS, USA
| | - Felipe Alves Correa Carvalho Silva
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA; Department of Animal Science, North Carolina State University, Raleigh, NC, USA
| | - Mariana Sponchiado
- Department of Physiological Sciences, College of Veterinary Medicine, University of Florida, Gainesville, FL, USA
| | - Ky Garrett Pohler
- Department of Animal Science, Texas A&M University, College Station, TX, USA
| | - Mario Binelli
- Department of Animal Sciences, University of Florida, Gainesville, FL, USA.
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3
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Akköse M. Comparative evaluation of two commercial pregnancy-associated glycoproteins tests for early detection of pregnancy in dairy cattle. Theriogenology 2023; 200:11-17. [PMID: 36738574 DOI: 10.1016/j.theriogenology.2023.01.022] [Citation(s) in RCA: 7] [Impact Index Per Article: 7.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2022] [Revised: 01/15/2023] [Accepted: 01/25/2023] [Indexed: 01/28/2023]
Abstract
The aim of this study was to determine and compare the diagnostic accuracy of two pregnancy-associated glycoproteins tests (IDEXX on-farm pregnancy test [OFPT] and IDEXX rapid visual pregnancy test [RVPT]) for early pregnancy diagnosis in dairy cattle. Blood samples were collected from Holstein cows (n = 317) by coccygeal venipuncture 28-31 days after artificial insemination (AI). The OFPT and RVPT were performed on the farm within 2 h after blood collection using whole blood or blood serum. Transrectal ultrasonography (USG) was performed for pregnancy diagnosis on day 32 post-AI as a gold standard. One-hundred fourteen cows were diagnosed as pregnant and 203 were determined to be nonpregnant. Furthermore, embryonic mortality was detected in four of the nonpregnant animals, based on fragmented/dispersed embryonic membranes and the absence of heartbeat. Sixteen and 14 false positive results (13 jointly for both tests) were obtained for the RVPT and OFPT, respectively. Three false negative results were obtained for the RVPT. The sensitivity, specificity, positive predictive value, negative predictive value and accuracy for the OFPT were 100%, 93.1%, 89.1%, 100% and 95.6%, and for RVPT were 97.4%, 92.1%, 87.4%, 98.4% and 94.0%, respectively. The ability of both tests to distinguish between pregnant and open cows was very good (AUC of both tests above 0.9). The OFPT and RVPT almost perfectly agreed with each other. According to McNemar's analysis, false positive results have been caused difference between the two pregnancy tests and USG. In conclusion, both the RVPT and OFPT proved to be reliable and practical methods for pregnancy diagnosis 28-31 days after AI in dairy cows. However, the results of both pregnancy tests were affected by the occurrence of embryonic mortality around the time of their employment.
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Affiliation(s)
- Mehmet Akköse
- Department of Livestock, Dalaman Agricultural Enterprise, General Directorate of Agricultural Enterprises, Dalaman, Muğla, 48770, Türkiye.
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4
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Barbato O, Menchetti L, Brecchia G, Barile VL. Using Pregnancy-Associated Glycoproteins (PAGs) to Improve Reproductive Management: From Dairy Cows to Other Dairy Livestock. Animals (Basel) 2022; 12:ani12162033. [PMID: 36009621 PMCID: PMC9404451 DOI: 10.3390/ani12162033] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/01/2022] [Revised: 08/02/2022] [Accepted: 08/05/2022] [Indexed: 12/28/2022] Open
Abstract
Simple Summary Pregnancy loss is a major cause of infertility in dairy animals, particularly in cattle, which affects the productivity and profitability of farms. Detecting these unsuccessful pregnancies could offer farmers the opportunity to reduce the economic damage caused by pregnancy loss. The determination of proteins secreted by the placenta and related to the presence of a viable conceptus called pregnancy-associated glycoproteins (PAGs) represents a diagnostic tool to identify pregnant or non-pregnant animals and to predict early pregnancy failures. This review describes the state of the art related to PAGs’ function, pregnancy profile, and use in reproductive management in bovine and other dairy livestock. Abstract Pregnancy success represents a major issue for the economic income of cattle breeders. Early detection of pregnant and non-pregnant animals, as well as the prediction of early pregnancy failure, can influence farm management decisions. Several diagnostic tools for pregnancy are currently available. Among these, pregnancy-associated glycoproteins (PAGs) have been shown to be useful for identifying the presence of vital embryos and for pregnancy follow-up monitoring. This review presents an overview of the PAGs’ functions, their pregnancy trends, and their use as a tool to improve reproductive management in bovine and other dairy livestock, such as small ruminants and buffalos.
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Affiliation(s)
- Olimpia Barbato
- Department of Veterinary Medicine, University of Perugia, Via San Costanzo 4, 06126 Perugia, Italy
- Correspondence:
| | - Laura Menchetti
- Department of Veterinary Medicine, University of Milano, Via dell’Università 6, 26900 Lodi, Italy
| | - Gabriele Brecchia
- Department of Veterinary Medicine, University of Milano, Via dell’Università 6, 26900 Lodi, Italy
| | - Vittoria Lucia Barile
- Research Centre for Animal Production and Aquaculture, Consiglio per la Ricerca in Agricoltura e l’Analisi dell’Economia Agraria (CREA), Via Salaria 31, 00015 Monterotondo, Italy
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5
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Rotheneder S, González-Grajales LA, Beck H, Bootz F, Bollwein H. Variability of bovine conceptus-related volumes in early pregnancy measured with transrectal three-dimensional ultrasonography. J Dairy Sci 2022; 105:4534-4546. [PMID: 35307186 DOI: 10.3168/jds.2021-21006] [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: 07/14/2021] [Accepted: 02/01/2022] [Indexed: 11/19/2022]
Abstract
Up until now, bovine fetometry has been entirely based on 2-dimensional ultrasonography. Fetal size is estimated by several linear measurements such as crown-rump length (CRL). However, the advent of 3-dimensional ultrasonography (3D-US) provides in vivo access to the volumes of the fetus and its amniotic sac. The objective of this preliminary observational study was to determine the variability of conceptus-related volumes using transrectal 3D-US in dairy cows and to identify factors affecting them. Furthermore, relationships between the gained measurements and calf birth weight were investigated. In total, 315 Simmental and Holstein-Friesian dairy cows were transrectally examined at d 42 after breeding using a portable ultrasound device (Voluson I, GE Healthcare). Gestational volumes including fetal volume (FV) and amniotic sac volume (ASV) were determined with the software tool VOCAL (Virtual Organ Computer-Aided Analysis, GE Healthcare), whereas amniotic fluid volume (AFV) values were derived from the subtraction of FV from ASV. The CRL was determined by means of 3-dimensional data. The mean values and standard deviations for FV, ASV, AFV, and CRL were 1.47 ± 0.25 cm3, 5.86 ± 1.22 cm3, 4.38 ± 1.02 cm3, and 2.38 ± 0.18 cm, respectively. All gestational volumes and CRL values were affected by breed. In Simmental cattle, larger concepti were observed compared with pregnancies derived from Holstein-Friesian animals. Parity affected only ASV and AFV, with heifers showing greater values than lactating cows. The CRL was positively associated with milk protein content. It was not possible to predict calf weight at birth by using FV, ASV, or AFV; however, tendencies were found for ASV and AFV. The present study was the first to adopt 3D-US volumetry to assess early pregnancy development in dairy cattle. Our results showed that this method could be used successfully to identify minor variations in conceptus growth.
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Affiliation(s)
- S Rotheneder
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland; Tierarztpraxis Herrmann, Rankhofstraße 24, 79274 St. Märgen, Germany.
| | - L A González-Grajales
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland
| | - H Beck
- Tierarztpraxis Dr. Bootz, Schlößlestraße 43, 88356 Ostrach, Germany
| | - F Bootz
- Tierarztpraxis Dr. Bootz, Schlößlestraße 43, 88356 Ostrach, Germany
| | - H Bollwein
- Clinic of Reproductive Medicine, Vetsuisse Faculty, University of Zurich, Winterthurerstrasse 260, 8057 Zurich, Switzerland
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Fontes PLP, Oosthuizen N, Ciriaco FM, Sanford CD, Canal LB, Cooke RF, Pohler KG, Henry DD, Mercadante VRG, Ealy AD, Johnson SE, DiLorenzo N, Lamb GC. Effects of nutrient restriction on the metabolic profile of Bos indicus-influenced and B. taurus suckled beef cows. Animal 2021; 15:100166. [PMID: 33500214 DOI: 10.1016/j.animal.2020.100166] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/18/2020] [Revised: 12/17/2020] [Accepted: 12/18/2020] [Indexed: 10/22/2022] Open
Abstract
Recent research from our group demonstrated that Bos indicus-influenced suckled beef cows had greater resilience to withstand nutrient restriction and establish pregnancy compared with B. taurus cows exposed to the same conditions. To further understand these findings, differences in metabolic profile between these same B. indicus-influenced and B. taurus females were explored. Suckled beef cows (n = 134) were enrolled in a completely randomized design with a 2 × 2 factorial arrangement of treatments. On day -21, Angus (AN; Bos taurus) and Brangus (BN; B. indicus-influenced) cows were randomly assigned to 1) a diet that met daily energy maintenance requirements (MAINT), or 2) a diet that restricted intake to 70% of the daily energy maintenance requirements (RESTR). Cows were exposed to an estrus synchronization protocol and received an embryo 7 d after ovulation was pharmacologically induced on day 0. Blood samples were collected on days -21 and 19 to determine circulating concentrations of non-esterified fatty acids (NEFA), β-hydroxybutyrate (BHB), insulin, glucose, and IGF-1. Pregnancy status after embryo transfer was determined on day 28. As a consequence of the proposed diets, cows in the RESTR diet had less body condition score (BCS) on day 19 (P = 0.008) across breed types. Moreover, BCS change from day -21 to 19 was included as independent covariate into subsequent analyses, allowing for the comparison of breed types under an equivalent level of body reserve mobilization. A breed × diet interaction was observed for plasma insulin (P = 0.03) and IGF-1 (P = 0.04) on day 19, where AN-RESTR cows had less plasma concentrations on day 19 compared with AN-MAINT cows. Diets did not impact (P > 0.10) plasma insulin and IGF-1 concentrations in BN cows. No diet or breed effects were observed in circulating concentrations of NEFA, BHB, and glucose (P > 0.10). Across breed types and nutritional treatment, there was positive linear effect (P ≤ 0.04) of plasma concentrations of insulin and IGF-1 on the probability of pregnancy to fixed-time embryo transfer. In summary, the negative impacts of nutrient restriction on the somatotropic axis, independently of body tissue mobilization, were heightened in Bos taurus females compared with B. indicus-influenced cohorts, which corroborate with the differences observed in fertility between these subspecies.
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Affiliation(s)
- P L P Fontes
- Department of Animal and Dairy Science, University of Georgia, Athens, GA 30602, United States of America; Department of Animal Science, Texas A&M University, College Station, TX 77843, United States of America.
| | - N Oosthuizen
- Department of Animal Science, Texas A&M University, College Station, TX 77843, United States of America
| | - F M Ciriaco
- Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX 79409, United States of America
| | - C D Sanford
- Department of Animal and Range Sciences, Montana State University, Bozeman, MT 59717, United States of America
| | - L B Canal
- North Florida Research and Education Center, University of Florida, Marianna, FL 32446, United States of America
| | - R F Cooke
- Department of Animal Science, Texas A&M University, College Station, TX 77843, United States of America
| | - K G Pohler
- Department of Animal Science, Texas A&M University, College Station, TX 77843, United States of America
| | - D D Henry
- Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX 79409, United States of America
| | - V R G Mercadante
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA 24061, United States of America
| | - A D Ealy
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA 24061, United States of America
| | - S E Johnson
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA 24061, United States of America
| | - N DiLorenzo
- North Florida Research and Education Center, University of Florida, Marianna, FL 32446, United States of America
| | - G C Lamb
- Department of Animal Science, Texas A&M University, College Station, TX 77843, United States of America
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7
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De Carolis M, Barbato O, Acuti G, Trabalza-Marinucci M, Melo de Sousa N, Canali C, Moscati L. Plasmatic Profile of Pregnancy-Associated Glycoprotein (PAG) during Gestation and Postpartum in Sarda and Lacaune Sheep Determined with Two Radioimmunoassay Systems. Animals (Basel) 2020; 10:ani10091502. [PMID: 32854377 PMCID: PMC7552302 DOI: 10.3390/ani10091502] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2020] [Revised: 08/19/2020] [Accepted: 08/20/2020] [Indexed: 11/20/2022] Open
Abstract
Simple Summary Nowadays the need to optimize and maximize the productivity of dairy sheep leads farmers to plan lambing in specific periods in order to avoid economic loss due to nonproductive animals. The goal is to diagnose pregnancy at early gestation in order to minimize the costs of unproductive animals and to properly formulate rations for the energy requirements of gestating or lactating animals at the same time. Moreover, early pregnancy diagnosis, as well as the possibility of distinguishing between single and multiple gestations, enables farmers to plan the management of lambing well in advance thus minimizing manpower requirements. This study showed, for the first time, the plasmatic profile of PAG (pregnancy-associated glycoproteins) in Sarda and Lacaune ewes during gestation and the postpartum period using two different radioimmune assay (RIA) systems, thus enhancing our knowledge regarding PAG concentrations in domestic ruminants. Moreover, it showed that for both breeds these RIA systems are capable of distinguishing pregnant from nonpregnant ewes starting from day 18 of gestation. Furthermore, the rapid disappearance of PAG concentration following lambing did not require the use of a cut-off limit in postpartum animals as a means for detecting a new pregnancy. Abstract This study was carried out to determine ovine pregnancy-associated glycoprotein (oPAG) levels in the plasma of Sarda and Lacaune ewes throughout gestation and in the first month postpartum, using two heterologous radioimmunoassays (RIA-706 and RIA-srPool) and to study the correlations between PAG levels and fetal gender and number. On Day 18 of pregnancy, PAG concentrations were detected in 90.1% and 80.8% of Sarda pregnant ewes with RIA-706 and RIA-srPool, respectively; and in 90% and in 75% of Lacaune pregnant ewes with RIA-706 and RIA-srPool, respectively. From Day 30, PAG concentrations were detected in all pregnant ewes by using both RIA methods. In the postpartum period, the PAG concentrations in Sarda ewes decreased rapidly reaching minimal levels (<1 ng/mL) on day 28 using both RIA-706 and RIA-srPool. In Lacaune ewes, PAG-706 levels were higher than PAG-srPool from parturition until the last day of observation (Day 28 postpartum). It was also observed that mean concentrations were higher in multiple than in single pregnancies in Sarda and Lacaune ewes. Moreover, due to the rapid disappearance of PAG concentration following lambing, a cut-off limit in postpartum animals was not required as a means for detecting a new pregnancy.
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Affiliation(s)
- Martina De Carolis
- Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy; (M.D.C.); (G.A.); (M.T.-M.); (C.C.)
| | - Olimpia Barbato
- Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy; (M.D.C.); (G.A.); (M.T.-M.); (C.C.)
- Correspondence: ; Tel.: +39-075-585-7640; Fax: +39-075-585-7638
| | - Gabriele Acuti
- Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy; (M.D.C.); (G.A.); (M.T.-M.); (C.C.)
| | - Massimo Trabalza-Marinucci
- Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy; (M.D.C.); (G.A.); (M.T.-M.); (C.C.)
| | - Noelita Melo de Sousa
- Laboratory of Animal Endocrinology and Reproduction, Faculty of Veterinary Medicine, University of Liege, 4000 Liege, Belgium;
| | - Claudio Canali
- Department of Veterinary Medicine, University of Perugia, 06126 Perugia, Italy; (M.D.C.); (G.A.); (M.T.-M.); (C.C.)
| | - Livia Moscati
- Istituto Zooprofilattico Sperimentale dell’Umbria e delle Marche, via G. Salvemini 1, 06126 Perugia, Italy;
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8
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Cooke RF, Cardoso RC, Cerri RLA, Lamb GC, Pohler KG, Riley DG, Vasconcelos JLM. Cattle adapted to tropical and subtropical environments: genetic and reproductive considerations. J Anim Sci 2020; 98:5709616. [PMID: 31955201 DOI: 10.1093/jas/skaa015] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/14/2020] [Indexed: 02/06/2023] Open
Abstract
Efforts to understand biological functions and develop management schemes specific to Bos indicus-influenced cattle raised in tropical and subtropical environments are critical to meet the increasing global demand for protein. In the United States, B. indicus breeds are mostly used to generate B. indicus × B. taurus crosses with increased thermal and parasite tolerance, while retaining some productive characteristics of B. taurus cattle. Although crossbreeding represents a proven strategy to improve cattle adaptation almost immediately, research has also attempted to identify B. taurus genetics that can withstand subtropical and tropical climates. Reduced milk production and delayed reproductive maturation appear to be related with tropical adaptation of B. taurus breeds, as a means to conserve energy under stressful conditions and limited nutrition. Moreover, longevity may be the ultimate adaptation response to unfavorable environments, and retention of bulls and heifers from proven cows is the recommended strategy to improve longevity in B. indicus-influenced herds. Besides selection for longevity, other aspects should be considered when planning reproductive management in tropical and subtropical regions. Bos indicus and B. taurus breeds have multiple differences pertaining to reproductive function, including age at puberty, ovarian dynamics, and pregnancy development. Nutritional strategies such as the stair-step regimen, and use of exogenous progesterone (P4) inserts are options to hasten puberty attainment of late-maturing B. indicus-influenced heifers. Yet, limited pharmacological alternatives are available for reproductive management of B. indicus-influenced females in the United States, which rely on GnRH-based protocols not specifically designed to the reproductive function of B. indicus breeds. In contrast, hormonal protocols based on exogenous P4, estradiol esters, and equine chorionic gonadotropin are available for use in B. indicus females in South America. These include protocols tailored to prepubertal heifers, anestrous cows, and cycling nulliparous or parous females, which often yield pregnancy rates of 50% to fixed-time artificial insemination. The global dairy industry also faces similar challenges in increasing demand and production as the beef industry. Selection of cows capable of sustaining optimal milk yield, reproductive success, and health status in hot and humid conditions is essential for optimal dairy production in subtropical and tropical regions.
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Affiliation(s)
- Reinaldo F Cooke
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Rodolfo C Cardoso
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Ronaldo L A Cerri
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, BC
| | - G Cliff Lamb
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Ky G Pohler
- Department of Animal Science, Texas A&M University, College Station, TX
| | - David G Riley
- Department of Animal Science, Texas A&M University, College Station, TX
| | - José L M Vasconcelos
- School of Veterinary Medicine and Animal Science, São Paulo State University (UNESP), Botucatu, Brazil
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9
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Cooke RF, Daigle CL, Moriel P, Smith SB, Tedeschi LO, Vendramini JMB. Cattle adapted to tropical and subtropical environments: social, nutritional, and carcass quality considerations. J Anim Sci 2020; 98:skaa014. [PMID: 31955200 PMCID: PMC7023624 DOI: 10.1093/jas/skaa014] [Citation(s) in RCA: 35] [Impact Index Per Article: 8.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/25/2019] [Accepted: 01/14/2020] [Indexed: 02/07/2023] Open
Abstract
Beef production needs to increase from 60 million to 130 million tons by 2050 to feed a growing world population, and 70% of this production increase is expected from beef industries located in subtropical and tropical regions of the world. Bos indicus-influenced cattle predominate in these regions but are often managed using practices developed for Bos taurus breeds reared in temperate climates. Hence, a fundamental step to meet the increasing global demand for beef is to develop specific management for B. indicus-influenced cattle in tropical or subtropical environments. Bos taurus and B. indicus are different subspecies, and diverge in social and biological functions due to selection pressure caused by complex evolutionary and domestication processes. Bos indicus cattle display different social responses compared with B. taurus counterparts, which must be taken into account by management planning as these traits directly impact cattle performance and welfare. In tropical and subtropical regions, warm-season perennial C4 grasses are the dominant forages, and their availability has a significant influence on the productivity of beef cattle systems. The resilience of C4 grasses under adverse conditions is one of their most important characteristics, even though these forages have reduced nutritive value compared with forages from temperate climates. Accordingly, nutritional planning in tropical and subtropical conditions must include management to optimize the quantity and quality of C4 forages. Nutritional requirements of cattle raised within these conditions also require special attention, including inherent metabolic compromises to cope with environmental constraints and altered energy requirements due to body composition and heat tolerance. Nutritional interventions to enhance beef production need to be specifically tailored and validated in B. indicus-influenced cattle. As an example, supplementation programs during gestation or early life to elicit fetal programming or metabolic imprinting effects, respectively, yield discrepant outcomes between subspecies. Bos indicus-influenced cattle produce carcasses with less marbling than B. taurus cattle, despite recent genetic and management advances. This outcome is mostly related to reduced intramuscular adipocyte volume in B. indicus breeds, suggesting a lesser need for energy stored intramuscularly as a mechanism to improve thermotolerance in tropical and subtropical climates.
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Affiliation(s)
- Reinaldo F Cooke
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Courtney L Daigle
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Philipe Moriel
- Range Cattle Research and Education Center, University of Florida, Ona, FL
| | - Stephen B Smith
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Luis O Tedeschi
- Department of Animal Science, Texas A&M University, College Station, TX
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10
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Ealy AD, Seekford ZK. Symposium review: Predicting pregnancy loss in dairy cattle. J Dairy Sci 2019; 102:11798-11804. [PMID: 31587904 DOI: 10.3168/jds.2019-17176] [Citation(s) in RCA: 21] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2019] [Accepted: 08/22/2019] [Indexed: 12/20/2022]
Abstract
Several tools exist to diagnose pregnancy in dairy cattle. However, substantial pregnancy loss occurs within the first 60 d of gestation in cattle, and these losses have a profound adverse economic impact on the dairy and beef cattle industries. Detecting these impending pregnancy losses could offer producers an opportunity to reduce costs associated with this source of reproductive inefficiency. Several of the pregnancy diagnostic tools currently available and new technologies are being examined for their ability to predict pregnancies at risk for failing in early pregnancy. This review provides a synopsis of work undertaken recently to predict pregnancy losses in cattle. Currently, opportunities to predict pregnancy loss include (1) using transrectal ultrasonography to detect loss of the fetal heartbeat, floating debris within the placental fluids, and reductions in fetal size; (2) observing reductions in circulating progesterone concentrations; (3) detecting reductions in concentrations of circulating placental products; namely, pregnancy-associated glycoproteins and microRNAs; and (4) detecting reductions in the early pregnancy-dependent increase in interferon-stimulatory gene expression in peripheral blood leukocytes. An achievable goal may be to identify markers of embryo mortality so that researchers and clinicians can focus their efforts on developing intervention strategies for cows identified to be at risk for pregnancy failure.
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Affiliation(s)
- Alan D Ealy
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24061.
| | - Zachary K Seekford
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg 24061
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11
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Fontes PLP, Oosthuizen N, Ciriaco FM, Sanford CD, Canal LB, Pohler KG, Henry DD, Mercadante VRG, Timlin CL, Ealy AD, Johnson SE, DiLorenzo N, Lamb GC. Impact of fetal vs. maternal contributions of Bos indicus and Bos taurus genetics on embryonic and fetal development1. J Anim Sci 2019; 97:1645-1655. [PMID: 30759199 DOI: 10.1093/jas/skz044] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/03/2018] [Accepted: 02/12/2019] [Indexed: 01/31/2023] Open
Abstract
To evaluate how the inclusion of Bos indicus genotype influences early fetal development in cattle, a reciprocal embryo transfer approach was used in a completely randomized design with a 2 × 2 × 2 factorial arrangement of treatments to generate 55 pregnancies over 2 consecutive years (n = 55). Recipient cows were randomly assigned to (i) a diet that met daily energy maintenance requirements (MAINT) or (ii) a diet that restricted intake to 70% of the energy maintenance requirements (RESTR). Angus (AN) and Brangus (BN) embryo donors were superovulated and artificially inseminated with female sexed-sorted semen from the same breed. Embryos were then randomly transferred to either AN or BN recipients fed their respective diets for 28 d. Recipients remained on the dietary scheme until day 91 of gestation and were then comingled and fed a common diet that met their energy requirements until calving. Measurements included pregnancy establishment at day 28 of gestation, interferon-stimulated genes (ISG) expression in peripheral blood leukocytes, pregnancy-associated glycoproteins (PAG; using two commercial [A1 and A2] and one in-house assay), and fetal crown-to-rump length (CRL). Recipients in the RESTR diet had lower BWs and BCS (diet × day; P < 0.01) than MAINT recipients. Energy-restricted AN recipients experienced greater (recipient breed × diet, P < 0.01) pregnancy failure by day 28 than the other recipient breed × diet combinations. Restricted recipients that received AN embryos experienced greater pregnancy failure than RESTR recipients receiving BN embryos (embryo breed × diet; P = 0.03). No relevant differences were observed in ISG expression (P > 0.10). Recipients that received BN embryos had greater plasma concentrations of PAG in both A1 (embryo breed × day, P < 0.01) and A2 (embryo breed; P < 0.01). Alternatively, recipients that received AN embryos had greater plasma concentrations of PAG for the in-house assay (embryo breed × day; P < 0.01). In addition, fetuses from AN recipients had greater CRL on day 91 (breed × day, P < 0.01). In summary, Bos taurus cows experienced greater pregnancy failure when nutrient restricted. Furthermore, fetal size and the profile of PAG production during early gestation differed between B. indicus-influenced and B. taurus cattle.
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Affiliation(s)
- Pedro L P Fontes
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Nicola Oosthuizen
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Francine M Ciriaco
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | - Carla D Sanford
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | - Luara B Canal
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | - Ky G Pohler
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Darren D Henry
- Department of Animal and Food Sciences, Texas Tech University, Lubbock, TX
| | | | - Claire L Timlin
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA
| | - Alan D Ealy
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA
| | - Sally E Johnson
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA
| | - Nicolas DiLorenzo
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | - G Cliff Lamb
- Department of Animal Science, Texas A&M University, College Station, TX
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12
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Cooke RF. Early career achievement award: supplementing omega-6 fatty acids to enhance early embryonic development and pregnancy establishment in Bos indicus and B. taurus beef cows. J Anim Sci 2019; 97:485-495. [PMID: 30351357 DOI: 10.1093/jas/sky414] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2018] [Accepted: 10/19/2018] [Indexed: 02/04/2023] Open
Abstract
Our research group investigated the impacts of supplementing Ca salts of soybean oil (CSSO), a source of omega-6 fatty acids (FAs), on reproductive performance of beef cows. Initial studies were conducted with Nelore (Bos indicus) cows grazing tropical pastures. Cows were assigned to fixed-time artificial insemination (AI) and supplemented or not with 100 g/d (as-fed basis) of CSSO, and supplementation regimens ranged from days -11 to 28 relative to AI. Overall, CSSO supplementation during the 21 d after AI increased (P < 0.01) pregnancy rates from 38.1% (623/1,635 as pregnant/total nonsupplemented cows) to 49.0% (843/1,720 as pregnant/total CSSO-supplemented cows), and these outcomes were associated with enhanced early embryonic development and pregnancy establishment when omega-6 FA were supplemented. To verify this rationale, our group compared FA incorporation in grazing Nelore cows (n = 90) supplemented or not with CSSO (100 g/d; as-fed basis) beginning at fixed-time AI until slaughter at day 19 of gestation. Supplementing CSSO increased (P ≤ 0.05) incorporation of linoleic acid and its omega-6 derivatives in plasma, endometrium, corpus luteum, and conceptus, whereas the same responses were not observed (P ≥ 0.25) for omega-3 FA. Complementing these findings, grazing Nelore cows (n = 100) were supplemented or not with CSSO (100 g/d; as-fed basis) beginning at fixed-time AI, and assigned to transcervical uterine flush on day 15 of gestation. Supplementing CSSO increased (P ≤ 0.04) conceptus length (2.58 vs. 1.15 cm) and mRNA expression of interferon-tau (4.1-fold increase) and prostaglandin E synthase 2 (2.6-fold increase), which are critical regulators of pregnancy establishment. These outcomes were recently replicated in B. taurus beef cows consuming temperate forages. Pregnancy rates were greater (P = 0.01) in Angus cows receiving CSSO (100 g/d; as-fed basis) for 21 d after fixed-time AI (60.2%; 226/383 as pregnant/total cows) compared with nonsupplemented cows (51.7%; 193/388 as pregnant/total cows). Supplementing CSSO to Angus × Hereford cows (n = 96) beginning after AI also increased (P = 0.05) mRNA expression of interferon-tau in day 15 conceptuses (1.8-fold increase). Collectively, our research demonstrated that post-AI CSSO supplementation favors incorporation of omega-6 FA into maternal and embryonic tissues, which enhances interferon-tau synthesis by the conceptus and increases pregnancy rates to fixed-time AI in B. indicus and B. taurus beef cows.
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Affiliation(s)
- Reinaldo F Cooke
- Department of Animal Science, Texas A&M University, College Station, TX.,Programa de Pós-Graduação em Zootecnia/Faculdade de Medicina Veterinária e Zootecnia, UNESP-Univ. Estadual Paulista, Botucatu, SP, Brazil
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13
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Burns BM, Hiendleder S, Laing AR, Fordyce G, Herring AD. Ultrasonographic measurements in first trimester concepti identify predictors of birth weight and postnatal development in cattle. J Anim Sci 2018; 96:4186-4194. [PMID: 30184108 DOI: 10.1093/jas/sky290] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2018] [Accepted: 07/17/2018] [Indexed: 12/17/2022] Open
Abstract
The placenta is a major driver of prenatal growth and involved in programming of postnatal performance. We therefore determined placental and embryo-fetal ultrasonographic parameters in early pregnancy and their relationships with birth weight and postnatal weights in a Bos indicus-Bos taurus composite beef cattle population. Pregnancies were generated in 2-yr-old Droughtmaster heifers by artificial insemination after estrus synchronization in 2 consecutive years (2009, n = 36 and 2010, n = 57), with a subset of 2010 heifers used again as lactating 3-yr-old cows in 2011 (n = 24). Each cohort was managed as 1 contemporary group for measurements of Corpus luteum diameter, amnion length and width, placentome width and thickness, and embryo-fetal crown-rump length, at 7 and 8 wk of gestation. This was followed by recordings of birth weight, branding weight at 5 to 6 mo of age and weaning weight 2 mo later. At a significance threshold of P < 0.05, placentome thickness at week 7 was negatively correlated with weights at birth (r = -0.23), branding (r = -0.25), and weaning (r = -0.35), whereas placentome width at week 7 (r = 0.24) and thickness at week 8 (r = 0.29) were positively correlated with birth weight. Thicker placentomes in males at week 7 (7%) difference mirrored sex differences in weights at birth (7%), branding (10%), and weaning (6%). The sex difference trend for birth weight was not consistent across sire-year combinations, ranging from -3.2 to +4.7 kg (birth weight of males - females per sire). These results support the hypothesis that placental parameters at the transition from embryo to fetal stage are major predictors of fetal and postnatal growth, albeit with significant environmentally induced plasticity, in stabilized B. indicus-B. taurus composite populations, and suggest that elements of B. indicus-B. taurus reciprocal differences in birth weight persist in composite populations.
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Affiliation(s)
- Brian M Burns
- Centre for Animal Science, Queensland Alliance for Agriculture and Food Innovation, University of Queensland, St Lucia, Qld, Australia
| | - Stefan Hiendleder
- Robinson Research Institute, North Adelaide, SA, Australia.,JS Davies Epigenetics and Genetics Group, School of Animal and Veterinary Sciences, The University of Adelaide, Roseworthy, SA, Australia
| | - Alan R Laing
- Queensland Department of Agriculture and Fisheries, Ayr, Qld, Australia
| | - Geoffry Fordyce
- Centre for Animal Science, Queensland Alliance for Agriculture and Food Innovation, University of Queensland, St Lucia, Qld, Australia
| | - Andy D Herring
- Department of Animal Science, Texas A&M University, College Station, TX
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14
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Brandão AP, Cooke RF, Schubach KM, Marques RS, Bohnert DW, Carvalho RS, Dias NW, Timlin CL, Clark-Deener S, Currin JF, Jump DB, Pohler KG, Cerri RLA, Mercadante VRG. Supplementing Ca salts of soybean oil after artificial insemination increases pregnancy success in Bos taurus beef cows. J Anim Sci 2018; 96:2838-2850. [PMID: 29688495 DOI: 10.1093/jas/sky156] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2018] [Accepted: 04/19/2018] [Indexed: 01/25/2023] Open
Abstract
Two experiments investigated the effects of supplementing Ca salts of soybean oil (CSSO) during early gestation on reproductive function and pregnancy rates to AI in Bos taurus beef cows. In Exp. 1, 771 suckled, lactating, multiparous Angus cows were divided into 22 groups of approximately 35 cows per group and timed inseminated on day 0. After AI, groups were assigned randomly to receive (as-fed basis) 100 g of ground corn + 100 g of soybean meal per cow/d, in addition to 1) 100 g/cow daily of CSSO (n = 11) or 2) 87 g of prilled saturated fat + 13 g of limestone per cow/d (CON; n = 11). Groups were maintained in individual tall fescue-dominated pastures and offered treatments from day 0 to 21. Pregnancy status was determined between days 45 and 55 via transrectal ultrasonography. Cows receiving CSSO had greater (P = 0.01) pregnancy rates to timed AI compared with CON (60.2 vs. 51.7%; SEM = 4.2). In Exp. 2, 90 suckled, lactating, multiparous Angus × Hereford cows housed in 18 drylot pens (5 cows per pen) were assigned to the same timed AI program and treatments from Exp. 1 (9 pens per treatment) and received 20 kg/d (DM basis) of grass-alfalfa hay. Transrectal ultrasonography was performed to verify ovulation and corpus luteum (CL) volume before AI (day 0), on days 7 and 15. After ultrasonography on day 15, cows diagnosed without a CL on day 0, but with a CL greater than 0.38 cm3 in volume on days 7 and 15 (2 or 3 cows per pen; CSSO, n = 20; CON, n = 24), were assigned to conceptus collection via transcervical flushing and endometrial biopsy in the uterine horn ipsilateral to the CL. Blood samples were collected for FA analysis on days 0, 7, and 15. Blood was collected from cows not assigned to conceptus collection for whole-blood RNA extraction on day 20 and for pregnancy diagnosis on day 30 by measuring concentrations of pregnancy-associated glycoproteins. Cows receiving CSSO had greater (P ≤ 0.04) mean plasma concentrations of linoleic acid and ω-6 FA compared with CON on days 7 and 15. Moreover, CSSO supplementation increased (P = 0.05) mRNA expression of interferon-tau by the conceptus and blood mRNA expression of interferon-stimulated gene 15 and 20,50-oligoadenylate synthetase on day 20 in gestating cows. Hence, post-AI CSSO supplementation to B. taurus beef cows improved pregnancy rates to timed AI, which can be associated with increased mRNA expression of interferon-tau by the conceptus when CSSO is supplemented during early gestation.
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Affiliation(s)
- Alice P Brandão
- Department of Animal Science, Texas A&M University, College Station, TX.,Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
| | - Reinaldo F Cooke
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Kelsey M Schubach
- Department of Animal Science, Texas A&M University, College Station, TX.,Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
| | - Rodrigo S Marques
- Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
| | - David W Bohnert
- Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
| | - Rafael S Carvalho
- São Paulo State University (UNESP), School of Veterinary Medicine and Animal Science, Botucatu, São Paulo, Brazil
| | - Nicholas W Dias
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA
| | - Claire L Timlin
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA
| | - Sherrie Clark-Deener
- Department of Large Animal Clinical Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA
| | - John F Currin
- Department of Large Animal Clinical Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA
| | - Donald B Jump
- Nutrition Program, School of Biological and Population Health Sciences, Linus Pauling Institute, Oregon State University, Corvallis, OR
| | - Ky G Pohler
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Ronaldo L A Cerri
- Faculty of Land and Food Systems, University of British Columbia, Vancouver, British Columbia, Canada
| | - Vitor R G Mercadante
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA
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15
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Oosthuizen N, Fontes PLP, Henry DD, Ciriaco FM, Sanford CD, Canal LB, de Moraes GV, DiLorenzo N, Currin JF, Clark S, Whittier WD, Mercadante VRG, Lamb GC. Administration of recombinant bovine somatotropin prior to fixed-time artificial insemination and the effects on fertility, embryo, and fetal size in beef heifers. J Anim Sci 2018; 96:1894-1902. [PMID: 29733416 DOI: 10.1093/jas/sky077] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/12/2017] [Accepted: 04/18/2018] [Indexed: 01/01/2023] Open
Abstract
Our objectives were to determine the effects of the administration of recombinant bovine somatotropin (bST) at the initiation of a fixed-time AI (TAI) protocol on concentrations of plasma IGF-1, follicle diameter, embryo/fetal size, and pregnancy rates in replacement beef heifers. Four hundred and fourteen Angus-based beef heifers were enrolled in a completely randomized design at 4 locations from January to July of 2016. All heifers were exposed to the 7-d CO-Synch + controlled internal drug release (CIDR) protocol where they received a 100-µg injection of GnRH and a CIDR insert on day -9, 25 mg of PGF2α at CIDR removal on day -2, followed by a 100-µg injection of GnRH and TAI 54 ± 2 h later on day 0. Within location, all heifers were randomly assigned to 1 of 2 treatments: 1) heifers that received 650 mg of bST on day -9 (BST; n = 191); or 2) heifers that did not receive bST on day -9 (CONTROL; n = 223). Blood samples were collected on day -9, 0, 28, and 60 to determine the plasma concentrations of IGF-1. Follicle diameter was determined on day -2 and 0 by transrectal ultrasonography. Pregnancy was diagnosed via transrectal ultrasonography on day 28 or 35, and again at least 30 d after the end of the breeding season. Embryo morphometry was assessed by measuring crown-to-rump length (CRL) on day 28, and fetal size was assessed by measuring crown-to-nose-length (CNL) on day 60. Concentrations of plasma IGF-1 did not differ between treatments on day -9 (P = 0.924), 28 (P = 0.075), and 60 (P = 0.792); however, concentrations of plasma IGF-1 were greater (P < 0.001) in BST-treated heifers at TAI (372.4 ± 16.6 vs. 193.7 ± 16.6 ng/ml). No differences (P = 0.191) were detected for follicle diameter between CONTROL and BST treatments on day -2 or 0. Pregnancy rates to TAI (PR/AI) were greater (P = 0.028) for CONTROL compared to BST heifers (42.5 ± 4.0 vs. 29.9 ± 4.1%). No differences (P = 0.536) in CRL were observed on day 28 between CONTROL and BST heifers. In addition, no difference (P = 0.890) was observed for CNL between CONTROL and BST treatments. Final pregnancy rates did not differ (P = 0.699) between treatments. The administration of bST to beef heifers at the initiation of a TAI protocol increased plasma concentrations of IGF-1 at TAI; however, failed to enhance follicle diameter, embryo/fetal size, and reduced PR/AI.
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Affiliation(s)
- Nicola Oosthuizen
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Pedro L P Fontes
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Darren D Henry
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | - Francine M Ciriaco
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | - Carla D Sanford
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | - Luara B Canal
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | | | - Nicolas DiLorenzo
- North Florida Research and Education Center, University of Florida, Marianna, FL
| | - John F Currin
- VA-MD College of Veterinary Medicine, Blacksburg, VA
| | - Sherrie Clark
- VA-MD College of Veterinary Medicine, Blacksburg, VA
| | | | | | - G Cliff Lamb
- Department of Animal Science, Texas A&M University, College Station, TX
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16
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Brandão AP, Cooke RF, Schubach KM, Marques RS, Bohnert DW, Mercadante VRG. Supplementing calcium salts of soybean oil after artificial insemination increases pregnancy success in Bos taurus beef cows. Transl Anim Sci 2018; 2:S9-S13. [PMID: 32704729 PMCID: PMC7200434 DOI: 10.1093/tas/txy017] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/13/2018] [Accepted: 04/09/2018] [Indexed: 11/25/2022] Open
Affiliation(s)
- Alice P Brandão
- Department of Animal Science, Texas A&M University, College Station, TX.,Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
| | - Reinaldo F Cooke
- Department of Animal Science, Texas A&M University, College Station, TX
| | - Kelsey M Schubach
- Department of Animal Science, Texas A&M University, College Station, TX.,Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
| | - Rodrigo S Marques
- Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
| | - David W Bohnert
- Eastern Oregon Agricultural Research Center, Oregon State University, Burns, OR
| | - Vitor R G Mercadante
- Department of Animal and Poultry Sciences, Virginia Polytechnic Institute and State University, Blacksburg, VA
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17
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Vailes MT, McCoski SR, Wooldridge LK, Reese ST, Pohler KG, Roper DA, Mercadante VR, Ealy AD. Post-transfer outcomes in cultured bovine embryos supplemented with epidermal growth factor, fibroblast growth factor 2, and insulin-like growth factor 1. Theriogenology 2018; 124:1-8. [PMID: 30317067 DOI: 10.1016/j.theriogenology.2018.09.023] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2018] [Revised: 07/28/2018] [Accepted: 09/23/2018] [Indexed: 01/24/2023]
Abstract
This work examined the downstream fetal and placental outcomes of introducing a cocktail of uterine-derived growth factors during bovine embryo culture. Abattoir-derived bovine oocytes were matured and fertilized in vitro. On day 4 post-fertilization, ≥ 8-cell embryos were harvested, pooled and exposed to an embryokine mix, termed EFI, which contained recombinant human epidermal growth factor (10 ng/ml), bovine fibroblast growth factor-2 (10 ng/ml) and human insulin-like growth factor 1 (50 ng/ml) or to a carrier-only control treatment (CON). On day 7, individual, transfer-quality embryos were transferred to recipients. Timed ovulation was completed in mature, non-suckled commercial beef cows. Cows either were artificial inseminated (AI) or received an embryo (ET) on day 7 post-estrus (n = 23-31 cows/treatment over 4 replicate studies). The percentage of grade 1 and 2 morulae and blastocysts was greater (P < 0.05) for EFI-treated embryos than CON. The percentage of pregnant cows diagnosed by transrectal ultrasonography did not differ among the AI and ET groups on days 28, 42 and 56 post-estrus. There also were no differences in the ratio of male to female fetuses determined on day 60 post-estrus by transrectal ultrasonography. On day 21 post-estrus, the relative abundance of three interferon-stimulated gene (ISG) transcripts in peripheral leukocytes were not different based on AI/ET group or the sex of the conceptus. Circulating pregnancy-associated glycoprotein (PAG) concentrations differed (P < 0.05) among days. Also, a difference in PAG concentrations (P < 0.05) were detected between male and female pregnancies in the CON-ET group but not in the AI or EFI-ET groups. Crown-rump length was not affected by AI/ET group on day 42 but were less (P < 0.05) in the CON and EFI-ET groups than the AI group on day 56. These findings implicate EFI supplementation as a means for improving transferable embryo production in a bovine IVP system, but it is not clear if this treatment improves embryo competency after ET.
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Affiliation(s)
- McCauley T Vailes
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Sarah R McCoski
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Lydia K Wooldridge
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Sydney T Reese
- Department of Animal Sciences, Texas A&M University, College Station, TX, USA
| | - Ky G Pohler
- Department of Animal Sciences, Texas A&M University, College Station, TX, USA
| | - David A Roper
- Department of Animal Sciences & Veterinary Technology, Tarleton State University, Stephenville, TX, USA
| | - Vitor R Mercadante
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA, USA
| | - Alan D Ealy
- Department of Animal & Poultry Sciences, Virginia Tech, Blacksburg, VA, USA.
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18
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Santos DJA, Cole JB, Null DJ, Byrem TM, Ma L. Genetic and nongenetic profiling of milk pregnancy-associated glycoproteins in Holstein cattle. J Dairy Sci 2018; 101:9987-10000. [PMID: 30219417 DOI: 10.3168/jds.2018-14682] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/03/2018] [Accepted: 07/23/2018] [Indexed: 01/12/2023]
Abstract
Pregnancy-associated glycoproteins (PAG) are secreted by the trophoblast and are detectable in maternal circulation around the time of attachment of the fetal placenta, as well as in blood and milk throughout gestation. The understanding of the genetic mechanisms controlling PAG levels can confer advantages for livestock breeding programs given the precocity and the ease of obtaining this phenotype from routine pregnancy diagnosis. The aim of this study was to characterize PAG levels by estimating genetic parameters and correlations with other dairy traits, and to identify genomic regions and candidate genes associated with PAG levels in milk. The PAG data consisted of pregnancy diagnoses using commercial assays from 2012 to 2017, and genotype data consisted of 54,123 SNP markers for 2,352 individuals (embryos and dams). The model included contemporary group (herd, year, and season) and embryo age as fixed effects, and random embryonic (direct) and maternal (indirect) genetic effects. Using genomic data, the estimated heritability for direct and maternal genetic effects (± standard deviations) were 0.23 ± 0.05 and 0.11 ± 0.05, respectively. The genetic correlation between these effects was almost zero (0.001 ± 0.06). A preliminary analysis revealed low correlations between milk PAG levels and other dairy traits. The genome-wide association analysis was performed using 2 approaches: single-marker and single-step using all markers. Four genomic regions with direct genetic effects were detected on Bos taurus autosome (BTA) 6, BTA7, BTA19, and BTA29 of the embryonic genome. The BTA29 locus was within the bovine PAG gene cluster, suggesting a cis-regulatory quantitative trait locus on the PAG expression. However, other associations, without an obvious link to PAG expression, could be related to the transportation of PAG and their concentration in milk. Only 1 region from the maternal genome, on BTA4, had a significant indirect effect, where WNT2 is a candidate gene related to placenta vascularization and gestation health. Collectively, our results suggest a moderate genetic control of milk PAG levels from both maternal and fetal genomes, but larger studies are needed to fully evaluate the usefulness of milk PAG in the genetic evaluation of fetal growth and cow fertility.
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Affiliation(s)
- D J A Santos
- Department of Animal and Avian Sciences, University of Maryland, College Park 20742; Departamento de Zootecinia, Universidade Estadual Paulista, Jaboticabal, 14884-900, Brazil
| | - J B Cole
- Henry A. Wallace Beltsville Agricultural Research Center, Animal Genomics and Improvement Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705-2350
| | - D J Null
- Henry A. Wallace Beltsville Agricultural Research Center, Animal Genomics and Improvement Laboratory, Agricultural Research Service, USDA, Beltsville, MD 20705-2350
| | - T M Byrem
- Antel BioSystems Inc., Lansing, MI 48910
| | - L Ma
- Department of Animal and Avian Sciences, University of Maryland, College Park 20742.
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19
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Franco GA, Peres RFG, Martins CFG, Reese ST, Vasconcelos JLM, Pohler KG. Sire contribution to pregnancy loss and pregnancy-associated glycoprotein production in Nelore cows. J Anim Sci 2018. [PMID: 29518245 DOI: 10.1093/jas/sky015] [Citation(s) in RCA: 30] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Pregnancy loss is a major contributing factor to reproductive inefficiency in both the beef and dairy industries. Sires can have a significant influence on the amount of pregnancy loss; however, this relationship is still poorly investigated. The primary objective of this study was to identify sires associated with high or low incidence of pregnancy loss (between d 30 and 100 of gestation) and investigate their effect on concentration of circulating pregnancy-associated glycoproteins (PAGs). Postpartum multiparous Nelore cows were inseminated artificially at a fixed time (FTAI, d 0) after synchronization of ovulation. A total of 736 cows were assigned randomly to be inseminated with semen from either of 6 Angus sires, whereas a separate subset of 492 cows were inseminated randomly with semen from either of 3 Nelore (n = 235) or either of 2 Angus sires (n = 257). Estrus expression was evaluated on d 0 using Estrotect Heat Detector patches. Blood samples were collected on d 30 of gestation for quantification of PAGs and pregnancy diagnosis was performed by ultrasound on d 30 and 100 after FTAI. Cows diagnosed pregnant at the first examination but not pregnant at the second were defined to have pregnancy loss. Overall pregnancy rate at d 30 was 54% (660/1,228) and pregnancy loss was 6.21% (41/660). Cows receiving semen from Nelore sires had greater (P < 0.001) pregnancy rate, greater (P = 0.014) pregnancy loss, and lesser (P = 0.002) PAG concentrations at d 30 of gestation compared with cows receiving Angus semen. Circulating PAG concentrations were lower (P = 0.008) in cows that had pregnancy loss (9.76 ± 0.25 vs. 7.41 ± 1.02 ng/mL). Angus sires were retrospectively classified according to percentage of pregnancy loss as either high pregnancy loss (mean of 7.25% or 67% of total) or low pregnancy loss (mean of 3.93% or 33% of total). Cows receiving semen from high pregnancy loss sires had 1.9 times greater (P = 0.123) rate of pregnancy loss and had lower (P = 0.059) PAG concentrations at d 30 of gestation compared with cows mated to low pregnancy loss sires. In summary, PAG concentrations reflected probability of pregnancy maintenance and were influenced by both sire and sire breed used at FTAI. Variation in the incidence of pregnancy loss was detected among sires that could not be predicted with standard semen fertility evaluations. Exploring the relationship of sire and PAG production might be promising to improve sire selection with regard to pregnancy loss.
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Affiliation(s)
| | | | | | | | | | - Ky Garrett Pohler
- Department of Animal Science, University of Tennessee, Knoxville, TN
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20
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Bragança GM, Monteiro BM, Albuquerque RDS, de Souza DC, Campello CC, Zimmerman SO, Melo WDO, Teixeira PPM, Filho JDR, Viana RB. Using pregnancy-associated glycoproteins to provide early pregnancy diagnosis in Nelore cows. Livest Sci 2018. [DOI: 10.1016/j.livsci.2018.06.018] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/28/2022]
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21
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Toledo MZ, Baez GM, Garcia-Guerra A, Lobos NE, Guenther JN, Trevisol E, Luchini D, Shaver RD, Wiltbank MC. Effect of feeding rumen-protected methionine on productive and reproductive performance of dairy cows. PLoS One 2017; 12:e0189117. [PMID: 29261700 PMCID: PMC5738048 DOI: 10.1371/journal.pone.0189117] [Citation(s) in RCA: 39] [Impact Index Per Article: 5.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2017] [Accepted: 11/20/2017] [Indexed: 01/29/2023] Open
Abstract
The objectives of this study were to evaluate the effects of daily top-dressing (individually feeding on the top of the total mixed ration) with rumen-protected methionine (RPM) from 30 ± 3 until 126 ± 3 Days in milk on productive and reproductive performance in lactating dairy cows. A total of 309 lactating dairy Holstein cows (138 primiparous and 171 multiparous) were randomly assigned to treatment diets containing either RPM (21.2 g of RPM + 38.8 g of dried distillers grain; 2.34% Methionine [Met] of metabolizable protein [MP]) or Control (CON; 60 g of dried distillers grain; 1.87% Met of MP). Plasma amino acids were evaluated at the time of artificial insemination (AI) and near pregnancy diagnosis. Milk production and milk composition were evaluated monthly. Pregnancy was diagnosed on Day 28 (by Pregnancy-specific protein B [PSPB]), 32, 47, and 61 (by ultrasound) and sizes of embryonic and amniotic vesicle were determined by ultrasound on Day 33 after AI. Feeding RPM increased plasma Met at 6, 9, 12, and 18 hours after top-dressing with a peak at 12 hours (52.4 vs 26.0 μM; P < 0.001) and returned to basal by 24 hours. Cows fed RPM had a small increase in milk protein percentage (3.08 vs 3.00%; P = 0.04) with no differences on milk yield and milk protein yield. Additionally, in multiparous cows, RPM feeding increased milk protein (3.03 vs 2.95%; P = 0.05) and fat (3.45 vs 3.14%; P = 0.01) percentages, although no effects were observed in primiparous cows. In multiparous cows fed RPM, pregnancy loss was lower between Days 28 to 61 (19.6 [10/51] vs. 6.1% [3/49]; P = 0.03) or between Days 32 to 61 (8.9 [4/45] vs. 0 [0/0] %; P = 0.03), although, there was no effect of treatment on pregnancy loss in primiparous cows. Consistent with data on pregnancy loss, RPM feeding increased embryonic abdominal diameter (P = 0.01) and volume (P = 0.009) and amniotic vesicle volume (P = 0.04) on Day 33 of pregnancy in multiparous cows but had no effect on embryonic size in primiparous cows. Thus, the increase in plasma Met concentrations after feeding RPM was sufficient to produce a small increase in milk protein percentage and to improve embryonic size and pregnancy maintenance in multiparous cows. Further studies are needed to confirm these responses and understand the biological mechanisms that underlie these responses as well as the timing and concentrations of circulating Met that are needed to produce this effect.
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Affiliation(s)
- Mateus Z. Toledo
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Giovanni M. Baez
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Alvaro Garcia-Guerra
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
- Endocrinology and Reproductive Physiology Program, University of Wisconsin-Madison, Madison, WI, United States of America
| | - Nelson E. Lobos
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Jerry N. Guenther
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Eduardo Trevisol
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Daniel Luchini
- Adisseo USA Inc., Alpharetta, Georgia, Unites States of America
| | - Randy D. Shaver
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
| | - Milo C. Wiltbank
- Department of Dairy Science, University of Wisconsin-Madison, Madison, Wisconsin, Unites States of America
- Endocrinology and Reproductive Physiology Program, University of Wisconsin-Madison, Madison, WI, United States of America
- * E-mail:
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22
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Reese ST, Pereira MHC, Edwards JL, Vasconcelos JLM, Pohler KG. Pregnancy diagnosis in cattle using pregnancy associated glycoprotein concentration in circulation at day 24 of gestation. Theriogenology 2017; 106:178-185. [PMID: 29073542 DOI: 10.1016/j.theriogenology.2017.10.020] [Citation(s) in RCA: 33] [Impact Index Per Article: 4.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2017] [Revised: 10/05/2017] [Accepted: 10/09/2017] [Indexed: 11/19/2022]
Abstract
Cattle producers are limited to day 28-30 of gestation as the earliest time point for accurate pregnancy diagnosis due to the effectiveness of ultrasound and chemical based methods, including commercially available pregnancy associated glycoproteins (PAG) tests. The objective of the current studies were to determine if early gestation circulating PAG concentrations at day 24 could be used to diagnose pregnancy in dairy cattle undergoing embryo transfer. In vitro produced embryos were transferred into Holstein x Gir cows and heifers on day 7 following ovulation. Study 1 utilized only cows (n = 101) determined to be pregnant on day 24 of gestation by progesterone concentration, as well as CL and PAG presence. In study 2, animals were not predetermined to be pregnant and both heifers (n = 111) and cows (n = 242) were used. In both studies, blood was collected at day 24 for PAG analysis as well as day 31. Final pregnancy confirmation occurred on day 60 via transrectal ultrasonography. Serum PAG concentrations were quantified using an in house PAG ELISA. Following timed embryo transfer (TET) in study 1, of the 101 cows diagnosed as pregnant on day 24, 80 cows were identified as still pregnant on day 31 of gestation (77%). Study 2 had a pregnancy rate at day 31 of 33.7% of total embryos transferred. Mean circulating PAG concentration at day 24 differed (P < 0.001) between animals diagnosed pregnant and non-pregnant at day 31 in both studies (study 1, 2.964 ± 0.262 ng/mL vs 0.946 ± 0.168 ng/mL and study 2, 1.962 ± 0.261 ng/mL vs 0.731 ± 0.109 ng/mL). Concentration of PAG between pregnant and non-pregnant cows in study 1 and 2 was significant, however, pregnant heifers in study 2 (1.562 ± 0.266 ng/mL) had concentration of PAGs that only had a tendency to differ compared to non-pregnant heifers (non-pregnant, 0.799 ± 0.290 ng/mL; P = 0.0669). Only animals that were pregnant at day 31 were analyzed in late embryo mortality analysis (heifers, n = 54; cows, n = 159), defined as pregnancy loss between day 31 and 60. Between day 31 and 60, 39 (12 in study 1 and 28 in study 2) animals experienced late embryo mortality. Circulating concentrations of PAG were not significantly different (P > 0.05), in either study, at day 24 of gestation in animals that maintained pregnancy until day 60 compared to animals that lost pregnancy between day 31 and 60 (late embryo mortality, LEM). In summary, early gestation circulating PAG concentration may have application in diagnosing pregnancy at day 24 of gestation and more work is needed to determine the potential of early gestation PAGs in predicting embryo loss in dairy.
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Affiliation(s)
- S T Reese
- Department of Animal Science, University of Tennessee, 2506 River Drive, Knoxville, TN, United States
| | - M H C Pereira
- Department of Animal Production, São Paulo State University, Botucatu, SP, Brazil
| | - J L Edwards
- Department of Animal Science, University of Tennessee, 2506 River Drive, Knoxville, TN, United States
| | - J L M Vasconcelos
- Department of Animal Production, São Paulo State University, Botucatu, SP, Brazil
| | - K G Pohler
- Department of Animal Science, University of Tennessee, 2506 River Drive, Knoxville, TN, United States.
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Time-dependent changes in pregnancy-associated glycoproteins and progesterone in commercial crossbred sheep. Theriogenology 2016; 89:271-279. [PMID: 28043363 DOI: 10.1016/j.theriogenology.2016.10.029] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2016] [Revised: 10/28/2016] [Accepted: 10/31/2016] [Indexed: 11/20/2022]
Abstract
The ruminant placenta functions as an endocrine and paracrine organ secreting proteins, growth factors, and steroid hormones, including pregnancy-associated glycoproteins (PAG), proteins with elusive function, which are readily detectable in maternal serum after placental attachment. In sheep, circulating progesterone beyond gestational Day 50 is predominantly of placental origin. The relationship among placental secreted factors, including progesterone, remains uncertain in sheep. The first aim of the study was to determine the relationship between gestational PAG profiles-using two commercial ELISA assays-progesterone, and fetal growth during pregnancy. The second aim of the study was to assess the presence and clearance of PAG in neonatal lambs and peripartum ewes in commercial crossbred sheep. Maternal serum samples were collected during mid-pregnancy and assayed for PAG1, pregnancy-specific protein B (PSPB), and progesterone. Maternal serum samples were also collected weekly starting 1-month prepartum until 10 weeks postpartum. Serum samples from newborns were collected at birth until Day 12 after birth and assayed for PAG1. Circulating maternal PAG1 concentrations steadily increased throughout mid-gestation, whereas PSPB exhibited a bimodal pattern of secretion. A strong positive correlation was observed between progesterone and PAG1 (r2 = 0.779, P < 0.0001), but not between PSPB and progesterone. No relationship was found between placental factors (PAG1, PSPB, and progesterone) and fetal size. PAG1 concentrations were lower before and after parturition in singleton compared with twin pregnancies (P < 0.05). Maternal PAG1 concentrations began declining at parturition and continued to decline until 10 weeks after parturition (P < 0.05). In newborns, PAG1 concentrations continuously declined in both singleton and twins regardless of sex (P < 0.05) and cleared from newborn serum by 12 days after birth. Our findings reported for the first time how different assays used to determine circulating PAG concentrations display different gestational profiles in sheep and how it allows the differentiation between singleton and multiple pregnancies. In conclusion, the strong correlation between PAG1 and progesterone during gestation reports that PAG1 can be effectively used as a marker of placental function.
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Pohler K, Peres R, Green J, Graff H, Martins T, Vasconcelos J, Smith M. Use of bovine pregnancy-associated glycoproteins to predict late embryonic mortality in postpartum Nelore beef cows. Theriogenology 2016; 85:1652-1659. [DOI: 10.1016/j.theriogenology.2016.01.026] [Citation(s) in RCA: 46] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2015] [Revised: 01/12/2016] [Accepted: 01/27/2016] [Indexed: 01/22/2023]
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Gábor G, Kastelic JP, Abonyi-Tóth Z, Gábor P, Endrődi T, Balogh OG. Pregnancy Loss in Dairy Cattle: Relationship of Ultrasound, Blood Pregnancy-Specific Protein B, Progesterone and Production Variables. Reprod Domest Anim 2016; 51:467-73. [DOI: 10.1111/rda.12703] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/30/2015] [Accepted: 04/10/2016] [Indexed: 11/28/2022]
Affiliation(s)
- G Gábor
- National Agricultural Research and Innovation Centre Research Institute for Animal Breeding, Nutrition and Meat Science; Herceghalom Hungary
| | - JP Kastelic
- Department of Production Animal Health; Faculty of Veterinary Medicine; University of Calgary; Calgary, Alberta Canada
| | - Z Abonyi-Tóth
- Faculty of Veterinary Science Szent Istvan University; Gödöllő Hungary
| | - P Gábor
- Androvet Kft.; Budapest Hungary
| | - T Endrődi
- Dennis Gábor Applied University; Budapest Hungary
| | - OG Balogh
- National Agricultural Research and Innovation Centre Research Institute for Animal Breeding, Nutrition and Meat Science; Herceghalom Hungary
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Pohler KG, Pereira MHC, Lopes FR, Lawrence JC, Keisler DH, Smith MF, Vasconcelos JLM, Green JA. Circulating concentrations of bovine pregnancy-associated glycoproteins and late embryonic mortality in lactating dairy herds. J Dairy Sci 2015; 99:1584-1594. [PMID: 26709163 DOI: 10.3168/jds.2015-10192] [Citation(s) in RCA: 107] [Impact Index Per Article: 11.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/31/2015] [Accepted: 10/17/2015] [Indexed: 11/19/2022]
Abstract
The objectives of these experiments were as follows: (1) to determine the association between circulating concentrations of pregnancy-associated glycoproteins (PAG) and late embryonic mortality (EM) in lactating dairy cattle following fixed-time artificial insemination (TAI) on d 0 or timed embryo transfer (TET) on d 7, (2) to identify a circulating concentration of PAG on d 31 below which late EM would be likely to occur, and (3) to identify when during gestation (d 31-59) late EM is occurring. Cows were diagnosed pregnant on d 31 of gestation based on presence of a fetal heartbeat and reconfirmed to be pregnant on d 59 of gestation. Late EM occurred when a cow had a viable embryo on d 31 of gestation but not on d 59 following TAI or TET. Only pregnant cows on d 31 were included in the analysis (TAI-maintained, n=413; TAI-EM, n=77; TET-maintained, n=238; TET-EM, n=47). Cows that were pregnant at d 31 of gestation and maintained the pregnancy until d 59 had significantly higher circulating concentrations of PAG at d 31 of gestation compared with cows that experienced late EM between d 31 and 59 of gestation in both TAI and TET. To conduct a more stringent test of the effectiveness of a single circulating PAG concentration (d 31) to predict EM, a receiver-operating characteristic curve was generated to identify a PAG concentration on d 31 that would predict EM with ≥95% accuracy in cows that received TAI or TET. Based on positive and negative predicative value analysis, a circulating concentration of PAG below 1.4 ng/mL (TAI; minimal detectable level 0.28 ng/mL) and 1.85 ng/mL (TET) was 95% accurate in predicting EM (between d 31 and 59) at d 31 of gestation, respectively. Following TET, embryonic loss was tracked by Doppler ultrasound, progesterone, and PAG from d 24 to 59 of gestation, with more than 50% of the loss occurring between d 31 and 38 of gestation. In summary, circulating concentrations of PAG on d 31 of gestation may provide a good marker for predicting EM between d 31 and 59 of gestation, and the data suggest that this model could help predict which cows will undergo late EM.
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Affiliation(s)
- K G Pohler
- Division of Animal Sciences, University of Missouri, Columbia 65211
| | - M H C Pereira
- Departamento de Produção Animal, Faculdade de Medicina Veterinária e Zootecnia, São Paulo State University, Botucatu, São Paulo, Brazil 18168-000
| | - F R Lopes
- Departamento de Produção Animal, Faculdade de Medicina Veterinária e Zootecnia, São Paulo State University, Botucatu, São Paulo, Brazil 18168-000
| | | | - D H Keisler
- Division of Animal Sciences, University of Missouri, Columbia 65211
| | - M F Smith
- Division of Animal Sciences, University of Missouri, Columbia 65211
| | - J L M Vasconcelos
- Departamento de Produção Animal, Faculdade de Medicina Veterinária e Zootecnia, São Paulo State University, Botucatu, São Paulo, Brazil 18168-000
| | - J A Green
- Division of Animal Sciences, University of Missouri, Columbia 65211.
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Roberts JN, Byrem TM, Grooms DL. Application of an ELISA Milk Pregnancy Test in Beef Cows. Reprod Domest Anim 2015; 50:651-8. [DOI: 10.1111/rda.12546] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2014] [Accepted: 05/09/2015] [Indexed: 11/29/2022]
Affiliation(s)
- JN Roberts
- Department of Large Animal Clinical Sciences; Michigan State University; East Lansing MI USA
| | - TM Byrem
- Antel BioSystems; Lansing MI USA
| | - DL Grooms
- Department of Large Animal Clinical Sciences; Michigan State University; East Lansing MI USA
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28
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Wallace RM, Pohler KG, Smith MF, Green JA. Placental PAGs: gene origins, expression patterns, and use as markers of pregnancy. Reproduction 2015; 149:R115-26. [DOI: 10.1530/rep-14-0485] [Citation(s) in RCA: 87] [Impact Index Per Article: 9.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Pregnancy-associated glycoproteins (PAGs) are abundantly expressed products of the placenta of species within the Cetartiodactyla order (even-toed ungulates). They are restricted to this order and they are particularly numerous in the Bovidae. The PAGs exhibit a range of temporal and spatial expression patterns by the placental trophoblasts and probably represent a group of related proteins that perform a range of distinct functions in the epitheliochorial and synepitheliochorial placental forms. This review presents an overview of the origins of the PAGs, a summary of PAG expression patterns, and their use as markers of pregnancy status. Speculations about their putative role(s) in pregnancy are also presented.
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