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Pazinato FM, Curcio BDR, Varela Junior AS, Corcini CD, Wendt CG, Moreira F, Schmit RA, Nogueira CEW. Immunolocalization of Leptin and its Receptor (ObR-b) in Equine Placenta at Term and Plasma Level Measurement in the Late Gestation. J Equine Vet Sci 2019; 78:1-5. [PMID: 31203970 DOI: 10.1016/j.jevs.2019.03.008] [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: 11/24/2018] [Revised: 03/08/2019] [Accepted: 03/10/2019] [Indexed: 10/27/2022]
Abstract
Placental tissues from humans, rodents, and farm animal contain leptin and its receptor. Expression of leptin has already been described in horses, although there is no description about immunolocalization of leptin and its receptor. The aim of the present study was to investigate the presence and distribution of leptin and ObR-b in the equine placenta at term by immunofluorescence staining, and the changes on plasma leptin concentrations during late gestation. The present study involved eight Criollo-type mares carrying healthy pregnancies. Blood samples were collected during the third trimester of gestation, at foaling, and at 24 hours after foaling. Leptin concentrations were analyzed via radioimmunoassay. Plasma leptin concentrations did not change from the 8th to the 10th month of gestation and displayed a discrete decrease 24 hours after parturition (P = .07). The expression of leptin and ObR-b was observed in the cytoplasm of pseudostratified epithelial cells in the areolar region and in the epithelium of microcotyledons. Also, leptin receptor was allocated in the apical surface of the cells. The presence of leptin and its receptor (ObR-b) in the placenta of mares at term supports an endocrine and autocrine/paracrine action of leptin within this organ.
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Affiliation(s)
- Fernanda Maria Pazinato
- Departamento de Clínicas Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil
| | - Bruna da Rosa Curcio
- Departamento de Clínicas Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil.
| | - Antonio Sergio Varela Junior
- Departamento de Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Campus Universitário, Pelotas, Rio Grande do Sul, Brazil; Departamento de Patologia Animal, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil
| | - Carine Dahl Corcini
- Departamento de Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Campus Universitário, Pelotas, Rio Grande do Sul, Brazil; Departamento de Patologia Animal, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil
| | - Camila Gervini Wendt
- Departamento de Clínicas Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil
| | - Fabiana Moreira
- Departamento de Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Campus Universitário, Pelotas, Rio Grande do Sul, Brazil
| | - Rubia Alves Schmit
- Departamento de Reprodução Animal e Radiologia Veterinária, Universidade Estadual Paulista "Júlio de Mesquita Filho" - Campus Botucatu, Botucatu, São Paulo, Brazil
| | - Carlos Eduardo Wayne Nogueira
- Departamento de Clínicas Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil
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Abdelnaby EA, Abo El-Maaty AM. Dynamics of Follicular Blood Flow, Antrum Growth, and Angiogenic Mediators in Mares From Deviation to Ovulation. J Equine Vet Sci 2017. [DOI: 10.1016/j.jevs.2017.04.003] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/17/2023]
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Arfuso F, Giannetto C, Rizzo M, Fazio F, Giudice E, Piccione G. Serum levels of mitochondrial uncoupling protein 1, leptin, and lipids during late pregnancy and the early postpartum period in mares. Theriogenology 2016; 86:1156-64. [DOI: 10.1016/j.theriogenology.2016.04.005] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 04/04/2016] [Accepted: 04/05/2016] [Indexed: 12/17/2022]
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Abdelnaby EA, Abo El-Maaty AM, Ragab RS, Seida AA. Assessment of Uterine Vascular Perfusion During the Estrous Cycle of Mares in Connection to Circulating Leptin and Nitric Oxide Concentrations. J Equine Vet Sci 2016. [DOI: 10.1016/j.jevs.2015.08.021] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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Influence of mineral supplementation on oxidative stress, ovarian follicles growth and reproductive hormone concentration in cyclic Arab mares. ASIAN PACIFIC JOURNAL OF REPRODUCTION 2013. [DOI: 10.1016/s2305-0500(13)60107-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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Vizuete G, Diez E, Galisteo J, Agüera E, Aguilera-Tejero E, Perez-Marín CC. Comparison of different treatments for oestrous induction in seasonally anovulatory mares. Reprod Domest Anim 2012; 48:463-9. [PMID: 23137389 DOI: 10.1111/rda.12098] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/23/2012] [Accepted: 09/12/2012] [Indexed: 11/28/2022]
Abstract
The aim of this study was to evaluate the effects of different treatments for induction and synchronization of oestrus and ovulation in seasonally anovulatory mares. Fifteen mares formed the control group (C), while 26 mares were randomly assigned to three treatment groups. Group T1 (n = 11) were treated with oral altrenogest (0.044 mg/kg; Regumate(®) ) during 11 days. Group T2 (n = 7) was intravaginally treated with 1.38 g of progesterone (CIDR(®) ) for 11 days. In group T3 (n = 8), mares were also treated with CIDR(®) , but only for 8 days. All mares received PGF2α 1 day after finishing the treatment. Sonographic evaluation of follicles, pre-ovulatory follicle size and ovulation time was recorded. Progesterone and leptin levels were analysed. Results show that pre-ovulatory follicles were developed after the treatment in 88.5% of mares. However, the pre-ovulatory follicle growth was dispersal, and sometimes it was detected when treatment was not finished. While in mares treated with intravaginal device, the follicle was soon detected (1.5 ± 1.2 days and 2.3 ± 2.0 days in T2 and T3 groups, respectively), in T1 group, the pre-ovulatory follicle was detected slightly later (3.9 ± 1.6 days). The interval from the end of treatment to ovulation did not show significant differences between groups (T1 = 13.1 ± 2.5 days; T2 = 11.0 ± 3.6 days; T3 = 13.8 ± 4.3 days). The pregnancy rate was 47.4%, similar to the rate observed in group C (46.7%; p > 0.05). Initial leptin concentrations were significantly higher in mares, which restart their ovarian activity after treatments, suggesting a role in the reproduction mechanisms in mares. It could be concluded that the used treatments may be effective for oestrous induction in mares during the late phase of the seasonally anovulatory period. Furthermore, they cannot synchronize oestrus, and then, it is necessary to know the reproductive status of mares when these treatments are used for oestrous synchronization.
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Affiliation(s)
- G Vizuete
- Department of Animal Medicine and Surgery, Faculty of Veterinary Medicine, University of Cordoba, Cordoba, Spain
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Kędzierski W, Kusy R, Kowalik S. Plasma leptin level in hyperlipidemic mares and their newborn foals. Reprod Domest Anim 2011; 46:275-80. [PMID: 20565697 DOI: 10.1111/j.1439-0531.2010.01658.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The aim of this study was to evaluate the relationship between plasma leptin and lipid levels in breeding mares and their newborn foals. The study was conducted on 17 Polish cold-blood mares and their newborn foals. The mares were divided into two groups, according to the course of delivery. These groups were seven mares which had a normal delivery and 10 mares which had required veterinary intervention during their delivery. Blood samples were taken from the jugular vein of both the mares and their foals. The blood samples were taken within 30 min after delivery, as well as on four successive mornings directly afterwards. In obtained plasma samples, the leptin, triacylglycerols (TG) and free fatty acid (FFA) concentrations were measured. The leptin and TG levels in the plasma sampled on the day of delivery and the two following days were significantly higher in mares which received veterinary intervention during the delivery, when compared to the results obtained from the plasma of mares which had normal delivery. The results obtained from foals did not show any statistical differences. In conclusion, the conducted tests have shown that post-parturient hyperlipidemia and hyperleptinemia in mares did not influence the lipid status and plasma leptin level in newborn foals.
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Affiliation(s)
- W Kędzierski
- Department of Animal Biochemistry and Physiology, Faculty of Veterinary Medicine, University of Life Sciences in Lublin, Lublin, Poland.
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