A new class of orally active phenyl piperazine-based GH secretagogues was discovered through structural mimicry of known privileged scaffolds.
Potent oral activityBest phenyl piperazine compounds showed strong GH-releasing activity via oral administration
What the researchers found
Phenyl piperazine-based peptidomimetics were identified as potent, orally active GH secretagogues by mimicking privileged structural motifs from known GH-releasing compounds.
Why it matters
Discovering new chemical scaffolds for GH secretagogues expands the options for developing oral GH-releasing drugs, potentially leading to compounds with better pharmacological profiles than existing options.
How the study worked
Medicinal chemistry approach using structure-activity relationship analysis, synthesis of novel phenyl piperazine compounds, and in vitro/in vivo GH release testing.
What this study cannot tell us
Short abstract with limited detail on pharmacokinetic properties. Long-term safety data not available. How these compounds compare to MK-677 in clinical settings is unknown.
How to read the evidence
Medicinal chemistry communication in a respected journal. Demonstrates proof-of-concept for a new scaffold but limited pharmacological characterization.
When this study was published
Published in 1998, part of the active era of GH secretagogue drug discovery that produced MK-677 and related compounds.
The bigger picture
The search for oral GH secretagogues involved exploring multiple chemical scaffolds. This phenyl piperazine series represents another viable approach alongside MK-677's benzolactam scaffold, diversifying the chemical space for GH secretagogue drug development.
Questions still open
- How do these phenyl piperazine compounds compare to MK-677 in selectivity and side effect profiles?
- Did any of these compounds advance to clinical trials?
- What is the receptor binding profile compared to established GH secretagogues?
Common questions
What is a peptidomimetic?
Why do scientists keep developing new GH secretagogue types?
Read the original research
Synthesis and biological activities of phenyl piperazine-based peptidomimetic growth hormone secretagogues.
Bioorganic & medicinal chemistry letters, 8(11), 1431-6
Citation
Barakat, K J; Cheng, K; Chan, W W; Butler, B S; Jacks, T M; Schleim, K D; Hora, D F; Hickey, G J; Smith, R G; Patchett, A A; Nargund, R P. (1998). Synthesis and biological activities of phenyl piperazine-based peptidomimetic growth hormone secretagogues.. Bioorganic & medicinal chemistry letters, 8(11), 1431-6.