نتایج جستجو برای: ghrh

تعداد نتایج: 735  

Journal: :Endocrinology 1999
R D Kineman J Kamegai L A Frohman

The ability of synthetic GH secretagogues (GHSs) to elicit a maximal release of GH in vivo is dependent on an intact GH-releasing hormone (GHRH) signaling system. The role of GHRH in GHS-induced GH release has been attributed primarily to the ability of GHS to release GHRH from hypothalamic neurons. However, GHS also releases GH directly at the pituitary level. Several lines of evidence suggest...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Leo T O Lee Francis K Y Siu Janice K V Tam Ivy T Y Lau Anderson O L Wong Marie C M Lin Hubert Vaudry Billy K C Chow

In mammals, growth hormone-releasing hormone (GHRH) is the most important neuroendocrine factor that stimulates the release of growth hormone (GH) from the anterior pituitary. In nonmammalian vertebrates, however, the previously named GHRH-like peptides were unable to demonstrate robust GH-releasing activities. In this article, we provide evidence that these GHRH-like peptides are homologues of...

2004
Ming Yan Maria Hernandez Ruwei Xu Chen Chen

Objective: Growth hormone (GH)-releasing hormone (GHRH) and GH-releasing peptides (GHRPs) stimulate the release of GH through their specific receptors on somatotropes. Combined GHRH and GHRP administration causes a synergistic GH release in vivo by an unknown mechanism. The current study focuses on the direct action of GHRH and GHRP on several molecular targets in somatotropes. Design and metho...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2012
Rosemeire M Kanashiro-Takeuchi Lauro M Takeuchi Ferenc G Rick Raul Dulce Adriana V Treuer Victoria Florea Claudia O Rodrigues Ellena C Paulino Konstantinos E Hatzistergos Sarah M Selem Daniel R Gonzalez Norman L Block Andrew V Schally Joshua M Hare

Both cardiac myocytes and cardiac stem cells (CSCs) express the receptor of growth hormone releasing hormone (GHRH), activation of which improves injury responses after myocardial infarction (MI). Here we show that a GHRH-agonist (GHRH-A; JI-38) reverses ventricular remodeling and enhances functional recovery in the setting of chronic MI. This response is mediated entirely by activation of GHRH...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 1993
Z Rekasi A V Schally

Antagonistic analogs of growth hormone-releasing hormone (GHRH) are being synthesized in our laboratory for various clinical applications, including treatment of certain endocrine disorders and insulin-like growth factor I-dependent tumors. To evaluate the endocrine effect of these GHRH antagonists, a sensitive dynamic in vitro system has been developed. The concentration causing 50% inhibition...

Journal: :The Journal of neuroscience : the official journal of the Society for Neuroscience 2010
Fan Liao Ping Taishi Lynn Churchill Marcus J Urza James M Krueger

Growth hormone-releasing hormone (GHRH) promotes non-rapid eye movement sleep (NREMS), in part via a well characterized hypothalamic sleep-promoting site. However, GHRH may also act in the cortex to influence sleep. Application of GHRH to the surface of the cortex changes electroencephalographic (EEG) delta power. GHRH and the GHRH receptor (GHRHR) mRNAs are detectable in the rat cortex, and th...

Journal: :Journal of molecular endocrinology 2000
M Montero L Yon S Kikuyama S Dufour H Vaudry

Growth hormone-releasing hormone (GHRH) and pituitary adenylate cyclase-activating polypeptide (PACAP) belong to the same superfamily of regulatory neuropeptides and have both been characterized on the basis of their hypophysiotropic activities. This review describes the molecular evolution of the GHRH/PACAP gene family from urochordates to mammals and presents the hypothesis that the respectiv...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2014
Yong Jie Qin Sun On Chan Kelvin Kam Lung Chong Benjamin Fuk Loi Li Tsz Kin Ng Yolanda Wong Ying Yip Haoyu Chen Mingzhi Zhang Norman L Block Herman S Cheung Andrew V Schally Chi Pui Pang

Disruptions in immunity and occurrence of inflammation cause many eye diseases. The growth hormone-releasing hormone-growth hormone-insulin-like growth factor-1 (GHRH-GH-IGF1) axis exerts regulatory effects on the immune system. Its involvement in ocular inflammation remains to be investigated. Here we studied this signaling in endotoxin-induced uveitis (EIU) generated by LPS. The increase in G...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Nektarios Barabutis Andrew V Schally

Hypothalamic growth hormone-releasing hormone (GHRH) controls the release of growth hormone and acts as a growth factor in various tumors. Potent antagonistic analogues of GHRH have been synthesized that strongly suppress the growth of diverse cancers through several mechanisms. However, the influence of GHRH antagonists on the redox (reduction/oxidation) status of cancers has not been investig...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2008
Felipe F Casanueva Jesus P Camiña Marcos C Carreira Yolanda Pazos Jozsef L Varga Andrew V Schally

Ghrelin synergizes with growth hormone-releasing hormone (GHRH) to potentiate growth hormone (GH) response through a mechanism not yet fully characterized. This study was conducted to analyze the role of GHRH as a potential ligand of the ghrelin receptor, GHS-R1a. The results show that hGHRH(1-29)NH(2) (GHRH) induces a dose-dependent calcium mobilization in HEK 293 cells stably transfected with...

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