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Relevant bibliographies by topics / Somatotroph

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Academic literature on the topic 'Somatotroph'

Author: Grafiati

Published: 4 June 2021

Last updated: 6 February 2022

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Journal articles on the topic "Somatotroph"

1

Liu, Lixin, Carlton E. Dean, and Tom E. Porter. "Thyroid Hormones Interact with Glucocorticoids to Affect Somatotroph Abundance in Chicken Embryonic Pituitary Cells in Vitro." Endocrinology 144, no. 9 (2003): 3836–41. http://dx.doi.org/10.1210/en.2003-0160.

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Abstract Our laboratory has reported that somatotroph differentiation occurs between d 14 and d 16 of chicken embryonic development and that corticosterone (CORT) can induce somatotroph differentiation at an earlier age in vitro and in vivo. The objective of the present study was to test for thyroid hormone-CORT interactions on somatotroph differentiation in vitro. Pituitary cells from d 11 chicken embryos were treated with CORT and thyroid hormones, and GH-producing somatotrophs were detected by reverse hemolytic plaque assays and immunocytochemistry. We found that thyroid hormones can act sy

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Liu, L., and TE Porter. "Endogenous thyroid hormones modulate pituitary somatotroph differentiation during chicken embryonic development." Journal of Endocrinology 180, no. 1 (2004): 45–53. http://dx.doi.org/10.1677/joe.0.1800045.

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Growth hormone cell differentiation normally occurs between day 14 and day 16 of chicken embryonic development. We reported previously that corticosterone (CORT) could induce somatotroph differentiation in vitro and in vivo and that thyroid hormones could act in combination with CORT to further augment the abundance of somatotrophs in vitro. The objective of the present study was to test our hypothesis that endogenous thyroid hormones regulate the abundance of somatotrophs during chicken embryonic development. Plasma samples were collected on embryonic day (e) 9-14. We found that plasma CORT a

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Kraemer, William J., Shawn D. Flanagan, Jeff S. Volek, et al. "Resistance exercise induces region-specific adaptations in anterior pituitary gland structure and function in rats." Journal of Applied Physiology 115, no. 11 (2013): 1641–47. http://dx.doi.org/10.1152/japplphysiol.00687.2013.

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The anterior pituitary gland (AP) increases growth hormone (GH) secretion in response to resistance exercise (RE), but the nature of AP adaptations to RE is unknown. To that end, we examined the effects of RE on regional AP somatotroph GH release, structure, and relative quantity. Thirty-six Sprague-Dawley rats were assigned to one of four groups: 1) no training or acute exercise (NT-NEX); 2) no training with acute exercise (NT-EX); 3) resistance training without acute exercise (RT-NEX); 4) resistance training with acute exercise (RT-EX). RE incorporated 10, 1 m-weighted ladder climbs at an 85

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Porter, TE, CE Dean, MM Piper, KL Medvedev, S. Ghavam, and J. Sandor. "Somatotroph recruitment by glucocorticoids involves induction of growth hormone gene expression and secretagogue responsiveness." Journal of Endocrinology 169, no. 3 (2001): 499–509. http://dx.doi.org/10.1677/joe.0.1690499.

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Prior research indicates that growth hormone (GH) cell differentiation can be induced prematurely by treatment with glucocorticoids in vitro and in vivo. However, the nature of these responses has not been fully characterized. In this study, the time course of corticosterone induction of GH-secreting cells in cultures of chicken embryonic pituitary cells, responsiveness of differentiated somatotrophs to GH secretagogues, localization of somatotroph precursor cells within the pituitary gland, and the effect of corticosterone on GH gene expression were determined to better define the involvement

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Kovacs, K., L. Stefaneanu, A. Mayerhofer, T. E. Wagner, and A. Bartke. "Ultrastructural comparison of pituitary somatotrophs and lactotrophs in mice transgenic for bovine and human growth hormone." Proceedings, annual meeting, Electron Microscopy Society of America 49 (August 1991): 258–59. http://dx.doi.org/10.1017/s0424820100085599.

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Acromegaly and gigantism are due to prolonged oversecretion of growth hormone (GH) most often caused by a somatotroph adenoma of the pituitary. Although the morphologic features of various types of somatotroph adenomas have been extensively investigated by electron microscopy, very little information is available on the ultrastructural changes of non-tumorous somatotrophs in cases of protracted GH excess. Transgenic mice with foreign GH gene incorporated into their genome secrete ectopically increased quantities of GH, have elevated serum GH levels and develop gigantism; thus it seemed conceiv

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6

Bossis, Ioannis, Shotaro Nishimura, Michael Muchow, and Tom E. Porter. "Pituitary Expression of Type I and Type II Glucocorticoid Receptors during Chicken Embryonic Development and Their Involvement in Growth Hormone Cell Differentiation." Endocrinology 145, no. 7 (2004): 3523–31. http://dx.doi.org/10.1210/en.2004-0155.

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Abstract Glucocorticoids can induce somatotroph differentiation in vitro and in vivo during chick embryonic and rat fetal development. In the present study, we identified the nuclear receptors involved in somatotroph differentiation and examined their ontogeny and cellular distribution during pituitary development in the chicken embryo. Several steroids were tested for their ability to induce GH cell differentiation. Only glucocorticoids and aldosterone were effective at low nanomolar concentrations, suggesting involvement of both type I (mineralocorticoid) and type II (glucocorticoid) recepto

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7

Tierney, T., and IC Robinson. "Increased lactotrophs despite decreased somatotrophs in the dwarf (dw/dw) rat: a defect in the regulation of lactotroph/somatotroph cell fate?" Journal of Endocrinology 175, no. 2 (2002): 435–46. http://dx.doi.org/10.1677/joe.0.1750435.

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The dwarf (dw/dw) rat differs from all other rodent models of GH deficiency in that its pituitary prolactin (PRL) content is normal or even increased. We have now studied this throughout postnatal development, using a combination of immunocytochemistry, RIA and fluorescence-activated cell sorting (FACS) and analysis. Compared with normal Albino Swiss (AS) rats, adult dw/dw rats showed a profound reduction in pituitary GH content accompanied by increased PRL content, significantly so in females (AS vs dw/dw; P<0.01). Somatotroph hypoplasia was evident in the adult dw/dw rats, with most GH(+v

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8

Fedotov, V. P., V. I. Gudoshnikov, and T. V. Mamayeva. "Role of calcium ions and cyclic nucleotides in regulation of somatotroph functional activity in rats of different age." Problems of Endocrinology 40, no. 4 (1994): 42–45. http://dx.doi.org/10.14341/probl12145.

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Somatotropic hormone (STH) biosynthesis and secretion were studied in primary adenohypophyseal cultures of neonatal, prepubertal, and adult rats. It was shown by disc PAAG electrophorqsiS of products synthesized in incubation of neonatal rat hypophyseal cells that L-'4C leucin incorporates predominantly in the STH containing fraction. The share of prelabeled STH secreted into the culture virtually did not depend on the age of animals, this indicating the maturity of mechanisms of basal somatotroph secretion as early as in the neonatal period of development. Ca-regulating agents (ionophore A231

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Leite, V., E. A. Cardoso, M. E. Bock, L. G. Sobrinho, and P. A. Cattini. "A possible role for D8/PSF-A-like sequences in lactotroph versus somatotroph expression of the human prolactin gene." Journal of Endocrinology 149, no. 3 (1996): 473–83. http://dx.doi.org/10.1677/joe.0.1490473.

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Abstract The transcription factor GHF-1/Pit-1 is essential for the expression of GH and prolactin (PRL) by somatotrophs and lactotrophs respectively. However, PRL is not expressed in mature somatotrophs despite the presence of GHF-1/Pit-1. A possible mechanism is the presence of a somatotroph-specific repressor in the 5′-flanking sequences of the PRL gene. The region −3500/−1750 of the human (h) PRL gene is associated with negative regulatory activity and contains an element, designated D8, that resembles repressor PSF-A sequences which are located in the distal upstream region of placental me

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Hull, K. L., A. Murphy, and S. Harvey. "Avian somatotrophs: differentiation, morphology, distribution, and regulation." Canadian Journal of Physiology and Pharmacology 78, no. 12 (2000): 994–1002. http://dx.doi.org/10.1139/y00-094.

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Growth hormone (GH) is primarily synthesized, stored, and released by pituitary somatotrophs. These cells comprise a highly labile population that continuously undergoes proliferation, differentiation, and morphogenesis in response to changing physiological stimuli. They are also functionally and morphologically heterogeneous with distinct spatial and temporal distribution within the pituitary gland. The characteristics of these cells are discussed in this brief review.Key words: somatotroph, aves, growth hormone, adenohypophysis.

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Dissertations / Theses on the topic "Somatotroph"

1

Gilbert, Tanya. "Somatotroph regulation in dwarf rats." Thesis, University College London (University of London), 1999. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.322764.

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Rawlings, Stephen Roy. "Intracellular mechanisms regulating growth hormone release from the bovine somatotroph." Thesis, University of Cambridge, 1989. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.315241.

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Waite, Eleanor Jane. "Viral ion channel disruption of the somatotroph population in transgenic mice." Thesis, University College London (University of London), 2007. http://discovery.ucl.ac.uk/1446152/.

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Spontaneous and induced murine genetic models of disrupted somatotroph function have been useful in elucidating their relationships with other pituitary cell types as well as in studying downstream effects of GH deficiency. To disrupt somatotroph cell function in a temporally controlled fashion, I have applied a transgenic ion-channel conditional ablation strategy. The H37A variant of the influenza virus M2 protein that conducts monovalent cations unless blocked with the anti-influenza drug Rimantadine. This channel, previously shown to ablate GHRH neurons, has been targeted to somatotrophs us

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Thapar, Kamal. "Accumulation of hypophysiotropic hormone mRNAs in somatotroph pituitary tumors, biological, clinical and prognostic implications." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0022/NQ49927.pdf.

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Sondergaard, Jeffrey, Kyle Rice, Kira Weaver, Devin Josey, Taylor Gregory, and Christie Monahan. "Comparison Of Two Rat Somatotroph Cell Lines To Examine Tissue-Specific Transcription Of Growth Hormone." Digital Commons @ East Tennessee State University, 2018. https://dc.etsu.edu/asrf/2018/schedule/185.

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Growth Hormone (GH), also known as somatotrophin, is of cardinal importance in the regulation of somatic growth. Decreased GH expression results in short stature, whereas increased levels of GH lead to disorders such as gigantism or acromegaly. Mutations in the transcription factor Pit-1 have been shown to decrease GH, as well as prolactin (PRL; Parks et al., JCEM, 1999). However, understanding the regulation by selective GH transcription regulators, such as Zn16, a protein encoding 16 zinc fingers that binds to the GH promotor DNA (Wojtkiewicz et al., Endocrine, 2002), will require comparison

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Deeb, Asma. "The regulation of somatotroph function by growth hormone releasing hormone and its receptor in vitro." Thesis, University of Newcastle upon Tyne, 2001. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.246715.

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Gregory, Taylor, Devin Josey, Alexa Bancroft, et al. "RNA-Seq to analyze two related rat Growth Hormone-producing somatotroph cell lines for tissue-specific transcript expression." Digital Commons @ East Tennessee State University, 2019. https://dc.etsu.edu/asrf/2019/schedule/154.

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Growth Hormone (GH), also known as somatotropin, is a protein hormone secreted from the anterior pituitary gland. GH action results in longitudinal bone growth in children and adolescents and continues later to control a variety of metabolic reactions in adults. DNA polymorphisms leading to a decrease in GH expression result in persons of short stature, whereas those leading to overexpression of GH produce either acromegaly or gigantism. In order to diagnose and treat patients with altered GH production, understanding the control of GH expression is thus clinically relevant. In order to un

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Mear, Yves. "Implication de l'activité constitutive du récepteur de la ghréline dans la tumorigenèse des adénomes somatotropes." Thesis, Aix-Marseille, 2013. http://www.theses.fr/2013AIXM5102.

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Les adénomes hypophysaires sont les tumeurs intracérébrales les plus fréquentes. Les adénomes somatotropes hypersécrètent l’hormone de croissance (GH) et sont traités classiquement par des analogues somatostatinergiques. Une petite moitié des patients acromégales est néanmoins résistante à ces traitements. L’on sait depuis, quelques années, que le récepteur de la ghréline possède une forte activité constitutive et joue un rôle majeur dans la sécrétion de GH. Cette activité constitutive est-elle impliquée dans la tumorigenèse des adénomes somatotropes ? Nos travaux ont montré un niveau de trans

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Graillon, Thomas. "Etudes des voies somatostatinergiques et Pi3Kinase-Akt-mTOR dans les tumeurs intra-crâniennes (Adénomes hypophysaires, Méningiomes, Chordomes)." Thesis, Aix-Marseille, 2014. http://www.theses.fr/2014AIXM5053.

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1. Adénomes hypophysaires somatotropes : Elaboration d'un modèle in vitro et in vivo d'études du récepteur SST2 et des voies de signalisation somatostatinergiques.Afin de préciser l'étude du récepteur SST2, nous avons mis en place un modèle d'étude in vitro et in vivo, en établissant une lignée polyclonale exprimant le récepteur SST2 humain à de hauts niveaux. Ce modèle nous permettra de tester de nouveaux agonistes somatostatinergiques comme le pasiréotide et d'étudier de façon approfondie les voies de signalisation.2. Méningiomes : Mise en place d'un modèle de culture primaire de méningiome

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Ogawa, Shuichiro. "Abundant expression of the membrane-anchored protease-regulator RECK in the anterior pituitary gland and its implication in the growth hormone/insulin-like growth factor 1 axis in mice." Kyoto University, 2020. http://hdl.handle.net/2433/254494.

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Books on the topic "Somatotroph"

1

Ward, Megan Louise. Growth hormone autoregulation and the development of a sparsely granulated phenotype of somatotroph cells. National Library of Canada, 2002.

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2

K, Sejrsen, Vestergaard M, Neimann-Sørensen A, and Commission of the European Communities. Coordination of Agricultural Research., eds. Use of somatotropin in livestock production. Elsevier Applied Science, 1989.

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Production, Seminar on Use of Somatropin in Livestock. Use of Somatotropin in livestock production. Elsevier Applied Science, 1989.

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4

McClelland, John. Implications of new technology for the livestock sector: Animal growth hormones. U.S. Dept. of Agriculture, Economic Research Service, 1991.

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5

Blayney, Don P. Biotechnology and agriculture: Emergence of bovine somatotropin (bST). U.S. Dept. of Agriculture, Economic Research Service, Commodity Economics Division, 1990.

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6

Larson, Jean A. BST, bovine somatotropin/growth hormone: January 1986-December 1990. National Agricultural Library, 1991.

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Larson, Jean A. Biotechnology: Bovine somatotropin / growth hormone, January 1979 - November 1989. U.S. Dept. of Agriculture, National Agricultural Library, 1989.

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8

Benzi, Gianni. Biomedical problems on bovine somatotropin use in milk production. John Libbey Eurotext, 1990.

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9

Larson, Jean A. BST-bovine growth hormone: January 1991 - December 1993. National Agricultural Library, 1994.

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Larson, Jean A. BST-bovine growth hormone: January 1987 - January 1992. National Agricultural Library, 1992.

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Book chapters on the topic "Somatotroph"

1

Asa, Sylvia L. "Somatotroph Tumor." In Encyclopedia of Pathology. Springer International Publishing, 2020. http://dx.doi.org/10.1007/978-3-319-28845-1_5053-1.

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2

Zada, Gabriel, M. Beatriz S. Lopes, Srinivasan Mukundan, and Edward Laws. "Somatotroph (GH) Adenomas." In Atlas of Sellar and Parasellar Lesions. Springer International Publishing, 2016. http://dx.doi.org/10.1007/978-3-319-22855-6_12.

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3

Spada, A., M. Bassetti, M. Arosio, L. Vallar, F. R. Elahi, and G. Giannattasio. "The hypersecreting somatotroph: functional and morphological aspects." In Advances in Growth Hormone and Growth Factor Research. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-662-11054-6_28.

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Melmed, Shlomo, Shunichi Yamashita, and Sara Pixley. "Human Growth Hormone Gene Regulation in Somatotroph Cell Cultures." In Acromegaly. Springer US, 1987. http://dx.doi.org/10.1007/978-1-4613-1913-9_3.

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Fröhlich, Jürgen, Rudolf Hörmann, Bernhard Saller, et al. "Somatotrope Funktion." In Manual der Endokrinologie. Springer Berlin Heidelberg, 1999. http://dx.doi.org/10.1007/978-3-642-60065-4_3.

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Morgan, Michael M., MacDonald J. Christie, Luis De Lecea, et al. "Somatotropin Release-Inhibiting Factor." In Encyclopedia of Psychopharmacology. Springer Berlin Heidelberg, 2010. http://dx.doi.org/10.1007/978-3-540-68706-1_3589.

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Mehta, Ameeta, Evelien F. Gevers, and Mehul T. Dattani. "Congenital Disorders of the Hypothalamo-Pituitary-Somatotrope Axis." In Brook's Clinical Pediatric Endocrinology. Wiley-Blackwell, 2010. http://dx.doi.org/10.1002/9781444316728.ch4.

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Kane, James F., Steven M. Balaban, and Gregg Bogosian. "Commercial Production of Bovine Somatotropin inEscherichia coli." In ACS Symposium Series. American Chemical Society, 1991. http://dx.doi.org/10.1021/bk-1991-0444.ch014.

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Boyd, R. Dean, and Dale E. Bauman. "Mechanisms of Action for Somatotropin in Growth." In Animal Growth Regulation. Springer US, 1989. http://dx.doi.org/10.1007/978-1-4684-8872-2_12.

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Krieg, Michael, H. G. Bohnet, H. J. Breustedt, F. Leidenberger, H. Schatz, and R. P. Willig. "Somatotropin (GH, STH) und seine gestörte Sekretion." In Endokrinologie I. Springer Berlin Heidelberg, 1989. http://dx.doi.org/10.1007/978-3-642-74609-3_6.

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Conference papers on the topic "Somatotroph"

1

Otero de Joshi, Virginia, Herminia Gil, Silvia Contreras, Narahari V. Joshi, and Luis Hernandez. "Spectral investigation of somatotropin for different pH values." In Photonics West '96, edited by Robert A. Lieberman, Halina Podbielska, and Tuan Vo-Dinh. SPIE, 1996. http://dx.doi.org/10.1117/12.238807.

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Reports on the topic "Somatotroph"

1

Glavaski-Joksimovic, Aleksandra, Ksenija Jeftinija, Colin G. Scanes, Lloyd L. Anderson, and Srdija Jeftinija. Ghrelin Stimulates Porcine Somatotropes. Iowa State University, 2004. http://dx.doi.org/10.31274/ans_air-180814-55.

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Scanes, Colin G., Aleksandra Glavaski-Joksimovic, Sara A. Johannsen, Srdija Jeftinija, and Lloyd A. Anderson. Subpopulations of Chicken Somatotropes with Differing Intracellular Calcium Concentrations Responses to Secretagogues. Iowa State University, 2008. http://dx.doi.org/10.31274/ans_air-180814-193.

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