Tesamorelin and CJC-1295 are synthetic peptide analogues of Growth Hormone-Releasing Hormone (GHRH), which are used clinically to stimulate the anterior pituitary gland to increase its natural secretion of Growth Hormone (GH). Tesamorelin is a specific GHRH analogue approved for clinical use, while CJC-1295 is a synthetic GHRH analogue often modified with a Drug Affinity Complex (DAC) to extend its half-life significantly. Both compounds work to amplify the body’s natural GH pulse for therapeutic benefit.
Origin
These compounds are the result of pharmaceutical efforts to create long-acting, stable agonists for the GHRH receptor, overcoming the short half-life of the naturally occurring GHRH. Their development provided a more physiological method for boosting GH levels compared to direct GH injection. They are key tools in the clinical management of somatopause and related metabolic conditions, promoting Growth Hormone Axis Repair.
Mechanism
These peptides bind to the GHRH receptors on somatotroph cells in the pituitary, which directly stimulates the synthesis and release of Growth Hormone. The key difference is the half-life extension in the modified CJC-1295/DAC, which allows for less frequent dosing and a more sustained, elevated baseline of GH secretion. This sustained signaling leads to increased production of Insulin-like Growth Factor-1 (IGF-1) from the liver, which mediates many of the systemic anabolic effects.
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