{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,29]],"date-time":"2025-10-29T05:15:26Z","timestamp":1761714926567,"version":"build-2065373602"},"reference-count":60,"publisher":"CSIRO Publishing","issue":"11","license":[{"start":{"date-parts":[[2025,5,27]],"date-time":"2025-05-27T00:00:00Z","timestamp":1748304000000},"content-version":"vor","delay-in-days":2161,"URL":"https:\/\/doi.org\/10.1071\/journalslicense"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2019,10,2]]},"abstract":"<jats:p>Viscachas are native rodents of South America that present a long pregnancy of ~154 days. In this work, we analysed variations in the expression of proliferating cellular nuclear antigen, oestrogen and androgen receptors (ERa and AR) in pituitary pars distalis (PD) and pars tuberalis (PT) in relation to oestradiol and testosterone serum levels in non-pregnant and pregnant viscachas. In PD, cell proliferation increased with pregnancy and lactotrophs proliferated during mid-pregnancy (MP). ERa nuclear-immunoreactive cells (ERan-ir) were maximal in late pregnancy and AR expression did not vary during pregnancy. In PT, cell proliferation and AR expression increased during pregnancy, but ERa expression was very scarce. The immunostaining pattern of receptors was different in PD and PT. The peak of serum oestradiol and testosterone occurred during MP. Our results suggest that cell proliferation and gonadal receptors might be differentially regulated in the pituitary by oestradiol and testosterone during viscacha pregnancy.<\/jats:p>","DOI":"10.1071\/rd18423","type":"journal-article","created":{"date-parts":[[2019,6,27]],"date-time":"2019-06-27T01:36:23Z","timestamp":1561599383000},"page":"1707-1718","source":"Crossref","is-referenced-by-count":2,"title":["Variations in the adenohypophysis of the expression of proliferating cellular nuclear antigen, oestrogen and androgen receptors in relation to gonadal steroids during pregnancy of viscachas (Lagostomus maximus maximus)"],"prefix":"10.1071","volume":"31","author":[{"given":"Gabriela J.","family":"Rosales","sequence":"first","affiliation":[{"name":"ALaboratorio de Histolog\u00eda, \u00c1rea Morfolog\u00eda, Departamento de Bioqu\u00edmica y Ciencias Biol\u00f3gicas, Facultad de Qu\u00edmica, Bioqu\u00edmica y Farmacia, Universidad Nacional de San Luis, Avenida Ej\u00e9rcito de los Andes 950 Bloque I Piso 1\u00b0, 5700 San Luis, Argentina."},{"name":"BConsejo Nacional de Investigaciones Cient\u00edficas y T\u00e9cnicas (CONICET), 5700 San Luis, Argentina."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Edith","family":"Perez","sequence":"additional","affiliation":[{"name":"ALaboratorio de Histolog\u00eda, \u00c1rea Morfolog\u00eda, Departamento de Bioqu\u00edmica y Ciencias Biol\u00f3gicas, Facultad de Qu\u00edmica, Bioqu\u00edmica y Farmacia, Universidad Nacional de San Luis, Avenida Ej\u00e9rcito de los Andes 950 Bloque I Piso 1\u00b0, 5700 San Luis, Argentina."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Graciela B.","family":"Rodriguez","sequence":"additional","affiliation":[{"name":"CLaboratorio de Parasitolog\u00eda, \u00c1rea de An\u00e1lisis Cl\u00ednicos, Departamento de Bioqu\u00edmica y Ciencias Biol\u00f3gicas, Facultad de Qu\u00edmica, Bioqu\u00edmica y Farmacia, Universidad Nacional de San Luis, Avenida Ejercito de los Andes 950, Bloque I, Piso 1\u00b0, 5700 San Luis, Argentina."}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-2039-0731","authenticated-orcid":true,"given":"Ver\u00f3nica P.","family":"Filippa","sequence":"additional","affiliation":[{"name":"ALaboratorio de Histolog\u00eda, \u00c1rea Morfolog\u00eda, Departamento de Bioqu\u00edmica y Ciencias Biol\u00f3gicas, Facultad de Qu\u00edmica, Bioqu\u00edmica y Farmacia, Universidad Nacional de San Luis, Avenida Ej\u00e9rcito de los Andes 950 Bloque I Piso 1\u00b0, 5700 San Luis, Argentina."},{"name":"BConsejo Nacional de Investigaciones Cient\u00edficas y T\u00e9cnicas (CONICET), 5700 San Luis, Argentina."},{"name":"DCorresponding author. 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