Artículo

Cristina, C.; García-Tornadú, I.; Díaz-Torga, G.; Rubinstein, M.; Low, M.J.; Becú-Villalobos, D.; Arzt E.; Guitelman M; Bronstein M. "Dopaminergic D2 receptor knockout mouse: An animal model of prolactinoma" (2006) Frontiers of Hormone Research. 35:50-63
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Abstract:

Dopamine receptor type 2 (D2R) knockout mice (KO) have chronic hyperprolactinemia, pituitary hyperplasia, and a moderate decrease in MSH content. They are also growth retarded evidencing an alteration in the GH-IGF-I axis. In D2R KO, lactotropes do not show dense secretory granules but degranulated cells and fewer somatotropes, gonadotropes and thyrotropes. Prolactin levels are always higher in female than in male knockouts, and in accordance, pituitary hyperplasia is observed at 8 months only in females. After 16 months of age, highly vascularized adenomas develop, especially in females. Prominent vascular channels in the hyperplastic and adenomatous pituitaries, as well as extravasated red blood cells not contained in capillaries is also a common finding. Prolactin is not the factor that enhances the hyperplastic phenotype in females while estrogen is a permissive factor. VEGF-A expression is increased in pituitaries from D2R KO. VEGF-A is expressed in follicle stellate cells. Because D2R receptors are found in lactotropes and not in follicle stellate cells, it may be inferred that a paracrine-derived factor from lactotropes is acting on follicle stellate cells to increase VEGF-A expression. VEGF-A does not induce pituitary cell proliferation, even though it enhances prolactin secretion. But it may act on adjacent endothelial cells and participate in the angiogenic process that increases the availability of different growth factors and mitogens. The D2R knockout mouse represents a unique animal model to study dopamine-resistant prolactinomas, and VEGF-A may be an alternative therapeutic target in this pathology. Copyright © 2006 S. Karger AG.

Registro:

Documento: Artículo
Título:Dopaminergic D2 receptor knockout mouse: An animal model of prolactinoma
Autor:Cristina, C.; García-Tornadú, I.; Díaz-Torga, G.; Rubinstein, M.; Low, M.J.; Becú-Villalobos, D.; Arzt E.; Guitelman M; Bronstein M.
Filiación:Instituto de Biología Y Medicina Experimental-CONICET, Buenos Aires, Argentina
Instituto de Investigaciones en Ingeniería Genética Y Biología Molecular, CONICET and University of Buenos Aires, Buenos Aires, Argentina
Vollum Institute, Oregon Health and Science University, Portland, OR, United States
Instituto de Biología Y Medicina Experimental, CONICET, Vuelta de Obligado 2490, 1428 Buenos Aires, Argentina
Palabras clave:dopamine 2 receptor; vascular endothelial growth factor A, mouse; vasculotropin A; animal; cell adhesion; conference paper; disease model; drug resistance; female; genetics; hyperplasia; hypophysis; hypophysis tumor; male; mouse; mouse mutant; neovascularization (pathology); pathology; peliosis hepatis; physiology; prolactinoma; sexual development; vascularization; Animals; Cell Adhesion; Disease Models, Animal; Drug Resistance, Neoplasm; Female; Hyperplasia; Male; Mice; Mice, Knockout; Neovascularization, Pathologic; Peliosis Hepatis; Pituitary Gland; Pituitary Neoplasms; Prolactinoma; Receptors, Dopamine D2; Sex Characteristics; Vascular Endothelial Growth Factor A
Año:2006
Volumen:35
Página de inicio:50
Página de fin:63
DOI: http://dx.doi.org/10.1159/000094308
Título revista:Frontiers of Hormone Research
Título revista abreviado:Front. Horm. Res.
ISSN:03013073
CAS:vasculotropin A, 489395-96-2; Receptors, Dopamine D2; Vascular Endothelial Growth Factor A; vascular endothelial growth factor A, mouse
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03013073_v35_n_p50_Cristina

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Citas:

---------- APA ----------
Cristina, C., García-Tornadú, I., Díaz-Torga, G., Rubinstein, M., Low, M.J., Becú-Villalobos, D., Arzt E.,..., Bronstein M. (2006) . Dopaminergic D2 receptor knockout mouse: An animal model of prolactinoma. Frontiers of Hormone Research, 35, 50-63.
http://dx.doi.org/10.1159/000094308
---------- CHICAGO ----------
Cristina, C., García-Tornadú, I., Díaz-Torga, G., Rubinstein, M., Low, M.J., Becú-Villalobos, D., et al. "Dopaminergic D2 receptor knockout mouse: An animal model of prolactinoma" . Frontiers of Hormone Research 35 (2006) : 50-63.
http://dx.doi.org/10.1159/000094308
---------- MLA ----------
Cristina, C., García-Tornadú, I., Díaz-Torga, G., Rubinstein, M., Low, M.J., Becú-Villalobos, D., et al. "Dopaminergic D2 receptor knockout mouse: An animal model of prolactinoma" . Frontiers of Hormone Research, vol. 35, 2006, pp. 50-63.
http://dx.doi.org/10.1159/000094308
---------- VANCOUVER ----------
Cristina, C., García-Tornadú, I., Díaz-Torga, G., Rubinstein, M., Low, M.J., Becú-Villalobos, D., et al. Dopaminergic D2 receptor knockout mouse: An animal model of prolactinoma. Front. Horm. Res. 2006;35:50-63.
http://dx.doi.org/10.1159/000094308