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| Bioavailability | Oral: <1.0%[1] |
| Elimination half-life | 2.5 hours[2] |
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| Chemical and physical data | |
| Formula | C46H56N12O6 |
| Molar mass | 873.032 g·mol−1 |
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Growth hormone-releasing peptide 6 (GHRP-6) (developmental code name SKF-110679), also known as growth hormone-releasing hexapeptide, is one of several synthetic met-enkephalin analogues that include unnatural D-amino acids, were developed for their growth hormone-releasing activity and are called growth hormone secretagogues. They lack opioid activity but are potent stimulators of growth hormone (GH) release. These secretagogues are distinct from growth hormone releasing hormone (GHRH) in that they share no sequence relation and derive their function through activation of a completely different receptor. This receptor was originally called the growth hormone secretagogue receptor (GHSR), but due to subsequent discoveries, the hormone ghrelin is now considered the receptor's natural endogenous ligand, and it has been renamed as the ghrelin receptor. Therefore, these GHSR agonists act as synthetic ghrelin mimetics.
It has been discovered that when GHRP-6 and insulin are administered simultaneously, GH response to GHRP-6 is increased (1). However, the consumption of carbohydrates and/or dietary fats, around the administration window of GH secretagogues significantly blunts the GH release. A recent study in normal mice showed significant differences in body composition, muscle growth, glucose metabolism, memory and cardiac function in the mice being administered the GHRP-6 (2). There are still many questions regarding this fairly new compound.
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Transcription
See also
References
- ^ Hartman ML, Farello G, Pezzoli SS, Thorner MO (1992). "Oral administration of growth hormone (GH)-releasing peptide stimulates GH secretion in normal men". J Clin Endocrinol Metab. 74 (6): 1378–84. doi:10.1210/jcem.74.6.1592884. PMID 1592884.
{{cite journal}}: CS1 maint: multiple names: authors list (link) - ^ Cabrales A, Gil J, Fernández E, Valenzuela C, Hernández F, García I, et al. (January 2013). "Pharmacokinetic study of Growth Hormone-Releasing Peptide 6 (GHRP-6) in nine male healthy volunteers". European Journal of Pharmaceutical Sciences. 48 (1–2): 40–46. doi:10.1016/j.ejps.2012.10.006. PMID 23099431.
Further reading
- Korbonits M, Goldstone AP, Gueorguiev M, Grossman AB (April 2004). "Ghrelin--a hormone with multiple functions". Frontiers in Neuroendocrinology. 25 (1): 27–68. doi:10.1016/j.yfrne.2004.03.002. PMID 15183037. S2CID 24821233.
- Peñalva A, Carballo A, Pombo M, Casanueva FF, Dieguez C (January 1993). "Effect of growth hormone (GH)-releasing hormone (GHRH), atropine, pyridostigmine, or hypoglycemia on GHRP-6-induced GH secretion in man". The Journal of Clinical Endocrinology and Metabolism. 76 (1): 168–171. doi:10.1210/jcem.76.1.8421084. PMID 8421084.
- Camanni F, Ghigo E, Arvat E (January 1998). "Growth hormone-releasing peptides and their analogs". Frontiers in Neuroendocrinology. 19 (1): 47–72. doi:10.1006/frne.1997.0158. PMID 9465289. S2CID 31400577.
- Adeghate E, Ponery AS (July 2002). "Ghrelin stimulates insulin secretion from the pancreas of normal and diabetic rats". Journal of Neuroendocrinology. 14 (7): 555–560. doi:10.1046/j.1365-2826.2002.00811.x. PMID 12121492. S2CID 26490804.
- McGirr R, McFarland MS, McTavish J, Luyt LG, Dhanvantari S (December 2011). "Design and characterization of a fluorescent ghrelin analog for imaging the growth hormone secretagogue receptor 1a". Regulatory Peptides. 172 (1–3): 69–76. doi:10.1016/j.regpep.2011.08.011. PMID 21893106. S2CID 8213917.
- Koh B, Hardie M (2013). "We need an advocate against ASADA's power in doping control". The Conversation.
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This page was last edited on 11 March 2024, at 19:16