Peptide Mechanism of Action Explorer | PathToPeptides

Mechanism of Action Explorer

Explore 8 interactive SVG pathway diagrams showing how peptide compounds work at the molecular level. Visualize receptor binding, signaling cascades, and downstream biological effects.

Interactive molecular pathway diagrams showing how peptides work at the cellular level

Frequently Asked Questions

Peptides are short chains of amino acids that act as signaling molecules by binding to specific receptors on cell surfaces. Once bound, they trigger intracellular signaling cascades that regulate processes like hormone release, tissue repair, immune modulation, and metabolism. Unlike small-molecule drugs that may interact with many targets, most peptides are highly selective for their receptor, which contributes to their favorable side-effect profiles. Their effects depend on the specific pathway they activate, such as the GH/IGF-1 axis, GLP-1 signaling, or BPC healing cascades.

GH-releasing peptides (GHRPs) like Ipamorelin, GHRP-2, and GHRP-6 bind to the growth hormone secretagogue receptor (GHS-R1a), also known as the ghrelin receptor, located on pituitary somatotroph cells. This triggers a calcium influx that stimulates pulsatile GH release. GHRH analogs like CJC-1295 and Sermorelin bind to the GHRH receptor (GHRH-R) on the same cells but through a different signaling mechanism involving cAMP. When combined, GHRPs and GHRH analogs produce synergistic GH elevation because they activate complementary pathways on the same target cells.

GHRH (Growth Hormone Releasing Hormone) analogs like CJC-1295 and Sermorelin mimic the hypothalamic hormone that amplifies and sustains GH pulses by binding the GHRH receptor. GHRP (Growth Hormone Releasing Peptide) compounds like Ipamorelin and GHRP-6 mimic ghrelin and initiate new GH pulses by binding the GHS-R1a receptor. GHRH analogs increase the amplitude of existing pulses, while GHRPs increase the frequency. This is why they are often combined in research protocols -- the GHRP initiates the pulse and the GHRH analog amplifies it, resulting in significantly greater GH output than either alone.

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