CJC-1295

Effects

CJC-1295 may markedly increase plasma growth hormone (GH) and insulin-like growth factor 1 (IGF-1) levels in animals and humans. With a single injection, in human subjects, CJC-1295 DAC may increase plasma GH levels by 2- to 10-fold for 6 days or longer and plasma IGF-1 levels by 0.5- to 3-fold for 9 to 11 days. With the inclusion of the DAC additive, the drug has an estimated half-life of about 6 to 8 days in humans. With multiple doses of CJC-1295, IGF-1 levels were found to remain elevated in humans for up to 28 days.

CJC-1295 has been shown to extend the half-life and bioavailability of growth-hormone-releasing hormone 1-29 and stimulate insulin-like growth factor 1 secretion. It increases the half-life of acting agents by bioconjugation. The extended half-life is achieved through the addition of a drug affinity complex (DAC) that binds to albumin, thus prolonging the peptide's presence in the bloodstream. It is primarily used for its potential to stimulate the release of growth hormone (GH) from the pituitary gland.

Risks

CJC-1295 was under investigation for the treatment of lipodystrophy and growth hormone deficiency and reached phase II clinical trials but was discontinued upon the death of one of the trial subjects. The attending physician of the trial believed that the most likely explanation for the incident was that the patient had asymptomatic coronary artery disease with plaque rupture and occlusion, and that the occurrence was unrelated to treatment with CJC-1295. Research was terminated nonetheless as a precaution.

Structure

CJC-1295 and Modified GRF (1-29) is equated falsely in several scientific papers. CJC-1295, CJC-1295 DAC, and CJC-1295 with DAC are synonyms, while Modified GRF (1-29), also known as CJC-1295 without DAC, lacks the C-terminus extension with Nɛ-maleimidopropionyl-Lysine, which is referred to as DAC.

The IUPAC modification nomenclature for the peptide CJC-1295 is Nɛ30-maleimidopropionyl-[D-Ala2, Gln8, Ala15, Leu27]-Sermorelin-Lys30.

Sermorelin: H-Tyr-Ala2-Asp-Ala-Ile-Phe-Thr-Asn8-Ser-Tyr-Arg-Lys-Val-Leu-Gly15-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Met27-Ser-Arg-NH2

CJC-1295 without DAC: H-Tyr-D-Ala2-Asp-Ala-Ile-Phe-Thr-Gln8-Ser-Tyr-Arg-Lys-Val-Leu-Ala15-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Leu27-Ser-Arg-NH2

CJC-1295: H-Tyr-D-Ala2-Asp-Ala-Ile-Phe-Thr-Gln8-Ser-Tyr-Arg-Lys-Val-Leu-Ala15-Gln-Leu-Ser-Ala-Arg-Lys-Leu-Leu-Gln-Asp-Ile-Leu27-Ser-Arg-(Nɛ-maleimidopropionyl-)Lys30-NH2

References

References

1. (July 2005). "Human growth hormone-releasing factor (hGRF)1-29-albumin bioconjugates activate the GRF receptor on the anterior pituitary in rats: identification of CJC-1295 as a long-lasting GRF analog". Endocrinology.
2. (December 2006). "Once-daily administration of CJC-1295, a long-acting growth hormone-releasing hormone (GHRH) analog, normalizes growth in the GHRH knockout mouse". American Journal of Physiology. Endocrinology and Metabolism.
3. (March 2006). "Prolonged stimulation of growth hormone (GH) and insulin-like growth factor I secretion by CJC-1295, a long-acting analog of GH-releasing hormone, in healthy adults". The Journal of Clinical Endocrinology and Metabolism.
4. (June 2008). "The discovery of growth hormone-releasing hormone: an update". Journal of Neuroendocrinology.
5. (December 2006). "Pulsatile secretion of growth hormone (GH) persists during continuous stimulation by CJC-1295, a long-acting GH-releasing hormone analog". The Journal of Clinical Endocrinology and Metabolism.
6. (2 June 2015). "Current Research Findings Regarding CJC-1295". Neo Scientific.
7. (November 2021). "Advances in the detection of growth hormone releasing hormone synthetic analogs". Drug Testing and Analysis.
8. (April 2024). "Comprehending the intermolecular interaction of dacomitinib with bovine serum albumin: experimental and theoretical approaches". Journal of Biomolecular Structure & Dynamics.
9. (July 2005). "Human growth hormone-releasing factor (hGRF)1-29-albumin bioconjugates activate the GRF receptor on the anterior pituitary in rats: identification of CJC-1295 as a long-lasting GRF analog". Endocrinology.
10. (December 2009). "Activation of the GH/IGF-1 axis by CJC-1295, a long-acting GHRH analog, results in serum protein profile changes in normal adult subjects". Growth Hormone & IGF Research.
11. (2014). "Identification of peptide and protein doping related drug compounds confiscated in Denmark between 2007-2013". Scandinavian Journal of Forensic Science.
12. ConjuChem. (August 2006). "Patient Died in Lipodystrophy Drug Study".
13. (2010). "Identification of CJC-1295, a growth-hormone-releasing peptide, in an unknown pharmaceutical preparation". Drug Testing and Analysis.
14. Thomas A, Walpurgis K, Tretzel L, Brinkkötter P, Fichant E, Delahaut P. (2015). "Expanded test method for peptides >2 kDa employing immunoaffinity purification and LC-HRMS/MS.". Drug Test Anal.
15. Memdouh S, Gavrilović I, Ng K, Cowan D, Abbate V. (July 2025). "Advances in the detection of growth hormone releasing hormone synthetic analogs.". Drug Test Anal.
16. Teichman SL, Neale A, Lawrence B, Gagnon C, Castaigne JP, Frohman LA. (2006). "Prolonged stimulation of growth hormone (GH) and insulin-like growth factor I secretion by CJC-1295, a long-acting analog of GH-releasing hormone, in healthy adults.". J Clin Endocrinol Metab.