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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)
 
 
 
 
 

Effect of neurotensin on growth hormone release in vivo.

In order to investigate the mechanisms involved in the in vivo Growth Hormone (GH) response to Neurotensin (NT) we assessed the influence of estrogen status as well as the effect of passive immunization with antisomatostatin and anti-Growth Hormone-Releasing Hormone (GHRH) on NT-induced GH secretion in pentobarbital anesthetized rats. We found that, contrary to GH responses to GHRH, estrogen-treated rats (one single injection of 200 micrograms s.c. of estradiol valerate, 3 days before the experiment), exhibited markedly increased GH responses to different doses of NT (7.5, 15 and 30 micrograms/kg, i.v.). The stimulatory effect of NT (30 micrograms/kg) on estrogen-treated rats was similar in rats that received normal rabbit serum or passively immunized with antisomatostatin or anti-GHRH serum. In conclusion, estrogens play a facilitatory role on NT-induced GH release in the rat, which is exerted through a mechanism independent of hypothalamic GHRH or somatostatin release.[1]

References

  1. Effect of neurotensin on growth hormone release in vivo. Ibañez, R., Mallo, F., Benitez, L., Alvarez, C.V., Sanchez-Franco, F., Dieguez, C. Life Sci. (1993) [Pubmed]
 
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