Cited by 74Growth Hormone and Insulin-like Growth FactorsHypothalamic control of reproductive hormonesRegulation of Appetite and Obesity

Growth Hormone‐Releasing Hormone Receptor (GNRH‐R) and Growth Hormone Secretagogue Receptor (GHS‐R) mRNA Levels During Postnatal Development in Male and Female Rats

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Kamegai, Wakabayashi, Kineman, Frohman·1999·Journal of Neuroendocrinology

Abstract

Experimental evidence suggests that differential pituitary sensitivity to hypothalamic signals exerts a role in mediating both age and sex dependent patterns of growth hormone (GH) release and synthesis. One mechanism by which pituitary sensitivity to hypothalamic GH regulators could be modified is by the differential synthesis of their pituitary receptors. In the present report we therefore studied the age and sex dependency of the expression of receptors for two known stimulators of GH release, growth hormone‐releasing hormone (GHRH) and the synthetic peptidyl and non‐peptidyl GH secretagogues (GHSs). Pituitary GHRH receptor (GHRH‐R) and GHS receptor (GHS‐R) mRNA levels were measured by reverse transcriptase‐polymerase chain reaction (RT‐PCR) in male and female rats at postnatal day 1, 10, 30 and 75. We also examined the age‐ and sex‐dependent expression of the GHS‐R in whole hypothalamic extracts, since the GHS‐R is also expressed in a variety of nuclei within the hypothalamus and has been linked to central regulation of the GH‐axis. Pituitary GHRH‐R mRNA concentrations were age‐dependent; the highest levels were observed in d1 pituitaries and then declined with age, reaching a nadir by d30. These results are in concordance with the age‐related decline in pituitary GHRH sensitivity. In contrast, the ontogenic pattern of GHS‐R expression was bimodal; GHS‐R mRNA concentrations in d1 and d30 pituitaries were approximately twice those at d10 and d75. These results mirror the transient increase in GHS sensitivity observed around the onset of puberty, suggesting that gonadal steroids mediate GHS‐R expression. GHRH‐R mRNA levels were comparable in males and females within each age while GHS‐R mRNA levels were gender dependent. At d30, male GHS‐R mRNA levels were ≈30% greater than in their female counterparts. This was reversed at d75, when females had 89% more GHS‐R mRNA per pituitary and 65% more per somatotrope than did age‐matched males. These sexual differences further support a role for gonadal steroids in the modulation of pituitary GHS‐R synthesis. The ontogenic and gender‐specific pattern of hypothalamic GHS‐R expression differed from that observed for the pituitary. Hypothalamic GHS‐R mRNA levels increased with age but exhibited no significant sex difference at each age tested. Taken together, these data demonstrate that changes in the levels of pituitary GHS‐R mRNA, but not GHRH‐R mRNA, are associated with changes in the gonadal steroid environment, thereby implicating the GHS/GHS‐R signalling system as a control point in the establishment and maintenance of sexually dimorphic patterns of GH secretion.

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Crossref · 10.1046/j.1365-2826.1999.00330.x

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  1. [1]1. rhythm governing growth hormone secretion in the rat. Endocrinology growth hormone varies according to sex: analysis by reverse hemolytic plaque assay. Endocrinology 1986; 119: 1037-1041. 1976; 98: 562-570.
  2. [7]7. Rosenblum CI, Hamelin M, Hreniuk DL, Palyha OC, Anderson J, Paress PS, Diaz C, Chou M, Liu KK, McKee KK, Pong S-S, Chaung Neuroendocrinology 1992; 56: 619-628.
  3. [10]10. McKee KK, Palyha OC, Feighner SD, Hreniuk DL, Van der Ploeg gene expression in the hypothalamus of the rat during development. Endocrinology 1991; 128: 2369-2375.
  4. [13]13. Guillaume V, Magnan E, Cataldi M, Dutour A, Sauze N, Renard M, gonadal hormones in the adult rat. Endocrinology 1991; 128: 1709-1716.
  5. [15]15. Smith RG, Van Der Ploeg HT, Howard AD, Feighner SD, Cheng K, in hypothalamus and placenta. Mol Endocrinol 1991; 5: 476-484.
  6. [19]19. Lago F, Senaris RM, Emson PC, Dominguez F, Dieguez C. Evidence dwarf rat. Neuroendocrinol 1998; 68: 312-318.
  7. [24]24. Szabo M, Cuttler L. Differential responsiveness of the somatotroph to Endocrinology 1985; 117: 187-195.
  8. [25]25. Ho KY, Thorner MO, Krieg RJ Jr, Lau SK, Sinha YN, Johnson ML, growth hormone-releasing factor during early neonatal development in the rat. Endocrinology 1986; 118: 69-73.
  9. [27]27. Shulman DI, Sweetland M, Duckett G, Root AW. Age-related differences in the growth hormone secretory response to hGHRH 1-44 in male rats Endocrinology 1988; 123: 1405-1411.
  10. [29]29. Bartolotta E, Bellone J, Aimaretti G, Arvat E, Benso L, Deghenghi R, Camammi F, Ghigo E. The GH-releasing effect of hexarelin, a synthetic the rat. Endocrinology 1985; 116: 1371-1378.
  11. [30]30. Cella SG, Locatelli V, De Gennaro Colonna V, Puggioni R, Pintor C, hexapeptide, in newborns is lower than in young adults. J Pediatr Endocrinol Metab 1997; 10: 491-497.
  12. [33]33. Arvat E, Camanni F, Ghigo E. Age-related growth hormone-releasing Endocrinology 1996; 137: 1326-1331.
  13. [37]37. Dohler KD, Wuttke W. Changes with age in levels of serum gonadotrop- releasing factor in vitro. Biol Reprod 1984; 31: 984-987.
  14. [40]40. Arvat E, Ramunni J, Bellone J, Di Vito L, Baffoni C, Broglio F, male and female rats. J Endocrinol 1985; 106: 281-289.
  15. [45]45. Loche S, Colao A, Cappa M, Bellone J, Aimaretti G, Farello G, Faedda Endcorinol 1993; 6: 21-31.

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Authors
Kamegai, Wakabayashi, Kineman, & Frohman
Affiliations
  • University of Illinois Chicago (US)
  • Nippon Medical School (JP)
Venue
Journal of Neuroendocrinology
Publisher
Wiley
Published
1999-04
Volume
11
Issue
4
Pages
299-306
ISSN
  • 0953-8194 (ISSN-L)
  • 1365-2826
OpenAlex
W2037061472
Cited by
74
References
74
Citations by year
2025: 2 · 2024: 1 · 2020: 1 · 2019: 2 · 2018: 1 · 2017: 2 · 2016: 3 · 2015: 1 · 2014: 2 · 2013: 1 · 2012: 1
FWCI
4.11
Type
journal article
Language
en
Open access
Locations
  • Journal of Neuroendocrinology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Japan Private School Promotion Foundation
  • National Institutes of Health
  • National Institute of Diabetes and Digestive and Kidney Diseases (DK30667)
Topics
  • Health Sciences › Medicine › Endocrinology, Diabetes and Metabolism › Growth Hormone and Insulin-like Growth Factors
  • Health Sciences › Medicine › Reproductive Medicine › Hypothalamic control of reproductive hormones
  • Life Sciences › Neuroscience › Endocrine and Autonomic Systems › Regulation of Appetite and Obesity
Keywords
growth hormone-releasing hormone receptor, growth hormone secretagogue receptor, growth hormone, pituitary gland, hypothalamus, postnatal development, sex differences, age-related gene expression, puberty, sex steroids, somatotrophs, growth hormone axis, rats, mRNA expression, growth hormone secretion
MeSH terms
Animals, Female, Hypothalamus, Male, Pituitary Gland, Pregnancy, Receptors, Cell Surface, RNA, Messenger, Receptors, Neuropeptide, Receptors, Pituitary Hormone-Regulating Hormone, Reverse Transcriptase Polymerase Chain Reaction, Receptors, G-Protein-Coupled, Rats, Receptors, Ghrelin

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