Immunolocalization of Leptin and its Receptor (ObR-b) in Equine Placenta at Term and Plasma Level Measurement in the Late Gestation
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 d...
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Published in: | Journal of equine veterinary science Vol. 78; pp. 1 - 5 |
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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.
•Leptin and its receptor are present in equine placenta at term.•Leptin and its receptor promote an intrinsic endocrine regulation in placenta.•Plasma leptin level remained constant from eighth month of gestation until foaling. |
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AbstractList | 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.
•Leptin and its receptor are present in equine placenta at term.•Leptin and its receptor promote an intrinsic endocrine regulation in placenta.•Plasma leptin level remained constant from eighth month of gestation until foaling. 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. |
Author | Moreira, Fabiana Curcio, Bruna da Rosa Corcini, Carine Dahl Wendt, Camila Gervini Schmit, Rubia Alves Pazinato, Fernanda Maria Nogueira, Carlos Eduardo Wayne Varela Junior, Antonio Sergio |
Author_xml | – sequence: 1 givenname: Fernanda Maria surname: Pazinato fullname: Pazinato, Fernanda Maria organization: Departamento de Clínicas Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil – sequence: 2 givenname: Bruna da Rosa orcidid: 0000-0001-8678-3816 surname: Curcio fullname: Curcio, Bruna da Rosa email: curciobruna@hotmail.com organization: Departamento de Clínicas Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil – sequence: 3 givenname: Antonio Sergio surname: Varela Junior fullname: Varela Junior, Antonio Sergio organization: Departamento de Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Campus Universitário, Pelotas, Rio Grande do Sul, Brazil – sequence: 4 givenname: Carine Dahl orcidid: 0000-0001-5683-7801 surname: Corcini fullname: Corcini, Carine Dahl organization: Departamento de Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Campus Universitário, Pelotas, Rio Grande do Sul, Brazil – sequence: 5 givenname: Camila Gervini surname: Wendt fullname: Wendt, Camila Gervini organization: Departamento de Clínicas Veterinária, Faculdade de Veterinária, Universidade Federal de Pelotas, Campus Capão do Leão, Pelotas, Rio Grande do Sul, Brazil – sequence: 6 givenname: Fabiana surname: Moreira fullname: Moreira, Fabiana organization: Departamento de Reprodução Animal Comparada, Instituto de Ciências Biológicas, Universidade Federal do Rio Grande, Campus Universitário, Pelotas, Rio Grande do Sul, Brazil – sequence: 7 givenname: Rubia Alves surname: Schmit fullname: Schmit, Rubia Alves organization: Departamento de Reprodução Animal e Radiologia Veterinária, Universidade Estadual Paulista “Júlio de Mesquita Filho” – Campus Botucatu, Botucatu, São Paulo, Brazil – sequence: 8 givenname: Carlos Eduardo Wayne surname: Nogueira fullname: Nogueira, Carlos Eduardo Wayne organization: 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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Cites_doi | 10.1006/bbrc.2002.6355 10.1186/s12958-015-0003-6 10.2527/jas.2006-771 10.1073/pnas.94.20.11073 10.1016/S0739-7240(03)00044-4 10.1530/ror.0.0050018 10.1677/joe.0.1780217 10.1186/1477-7827-7-113 10.1210/endo.138.10.5573 10.1590/1678-4162-7705 10.1016/j.acthis.2011.12.008 10.1095/biolreprod63.1.335 10.1016/j.domaniend.2005.02.006 10.1111/j.1439-0396.2011.01263.x 10.1095/biolreprod.105.045120 10.1111/j.1439-0531.2007.00963.x 10.1016/j.rvsc.2012.06.001 10.1038/372425a0 10.1111/j.2042-3306.1983.tb01826.x 10.1016/j.acthis.2013.05.008 10.1016/j.anireprosci.2009.03.002 10.1016/S0002-9378(98)70118-8 10.1053/plac.1999.0431 10.1038/29795 |
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Keywords | Placental metabolism Autocrine action Immunofluorescence Mares |
Language | English |
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SubjectTerms | Autocrine action Immunofluorescence Mares Placental metabolism |
Title | Immunolocalization of Leptin and its Receptor (ObR-b) in Equine Placenta at Term and Plasma Level Measurement in the Late Gestation |
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