Source comparison
6. Tonic vs pulsatile somatotroph stimulation
MK-677 produces sustained, predominantly tonic activation of GHSR-1a. Consequences: 24-hour GH AUC increases substantially (~60-100%) Individual GH pulse amplitude increases modestly Pulse frequency may actually increase in some cohorts Trough GH concentration
This comparison does not assign a generated winner or score.
- MK-677 produces sustained, predominantly tonic activation of GHSR-1a. Consequences:
- 24-hour GH AUC increases substantially (~60-100%)
- Individual GH pulse amplitude increases modestly
- Pulse frequency may actually increase in some cohorts
- Trough GH concentrations between pulses are elevated compared to placebo
- This profile differs fundamentally from the pulsatile peaks produced by CJC-1295 no-DAC + ipamorelin. For research designs where preserving sharp pulse definition is important (hepatic sex-dimorphic gene expression, JAK2-STAT5 pulse-encoded signalling), MK-677 is not the appropriate tool. For research designs where sustained IGF-1 elevation is the endpoint, MK-677 is often preferable because of its simpler oral dosing.