peptides

Ipamorelin: Growth Hormone Secretagogue Research Guide

Comprehensive research guide for Ipamorelin, a selective growth hormone secretagogue. Learn about its properties and research applications.

7 min readUpdated Jan 2025

Ipamorelin: Research Overview

Ipamorelin is a pentapeptide growth hormone secretagogue that selectively stimulates GH release. It's notable in research for its specificity—it promotes growth hormone release without significantly affecting other pituitary hormones.

Peptide Profile

PropertyDetails
TypeGrowth Hormone Secretagogue
Amino Acids5 (pentapeptide)
SequenceAib-His-D-2-Nal-D-Phe-Lys-NH₂
TargetGrowth Hormone Secretagogue Receptor (GHSR)
Molecular Weight~711 g/mol
Purity99%+ (HPLC verified)
FormLyophilized powder

Understanding Growth Hormone Secretagogues

The GH Axis

Growth hormone release is regulated by:

  • GHRH (Growth Hormone-Releasing Hormone) - Stimulates GH
  • Somatostatin - Inhibits GH
  • Ghrelin - Stimulates GH via GHSR
  • GHS Receptor (GHSR)

    The growth hormone secretagogue receptor (GHSR) is activated by:

  • Ghrelin (natural ligand)
  • Synthetic GHS peptides (like Ipamorelin)
  • Non-peptide GHS molecules
  • Ipamorelin's Unique Profile

    Selectivity

    What distinguishes Ipamorelin in research:

    ParameterIpamorelinOther GHS
    GH releaseYesYes
    CortisolMinimal effectOften increased
    ProlactinMinimal effectOften increased
    ACTHMinimal effectOften increased

    This selectivity makes Ipamorelin valuable for GH-specific research.

    Structure

    Ipamorelin contains modified amino acids:

  • Aib - α-aminoisobutyric acid
  • D-2-Nal - D-2-Naphthylalanine
  • D-Phe - D-Phenylalanine
  • These modifications provide:

  • Enhanced receptor binding
  • Improved stability
  • Resistance to degradation
  • Research Applications

    GH Research

  • GH release mechanisms
  • GHSR activation studies
  • Pulsatile secretion patterns
  • Dose-response relationships
  • Receptor Studies

  • GHSR binding kinetics
  • Receptor selectivity research
  • Downstream signaling pathways
  • Desensitization studies
  • Comparative Research

    Often studied alongside:

  • GHRP-6
  • GHRP-2
  • Hexarelin
  • GHRH analogs
  • Cell Biology

  • Pituitary cell studies
  • Somatotroph research
  • Signal transduction
  • Reconstitution Protocol

    Standard Volumes

    Vial SizeBAC WaterConcentration
    2mg1ml2,000mcg/ml
    5mg2ml2,500mcg/ml
    5mg2.5ml2,000mcg/ml

    Procedure

  • Allow vial to equilibrate to room temperature
  • Clean rubber stopper with alcohol
  • Draw bacteriostatic water into syringe
  • Add slowly along vial wall
  • Allow to dissolve naturally
  • Do not shake
  • Verify clear, colorless solution
  • Storage Requirements

    Lyophilized

    StorageTemperatureDuration
    Long-term-20°C2+ years
    Short-term2-8°C6-12 months

    Reconstituted

  • Temperature: 2-8°C only
  • Duration: 4-6 weeks
  • Protection: Keep away from light
  • Never freeze
  • Physical Properties

    Appearance

    Lyophilized:

  • White to off-white powder
  • May appear as loose cake
  • No discoloration
  • Reconstituted:

  • Clear, colorless solution
  • No particles
  • No cloudiness
  • Stability

    Ipamorelin is relatively stable due to:

  • Modified amino acids
  • Protected N-terminus
  • Amidated C-terminus
  • Research Considerations

    Dosing in Research

    Research protocols vary, but considerations include:

  • Pulsatile vs. continuous exposure
  • Time-course studies
  • Dose-response curves
  • Common Combinations

    Ipamorelin is often researched with:

  • CJC-1295 - GHRH analog combination
  • MOD GRF - For synergistic studies
  • GHRH - For pathway comparison
  • Controls

    Appropriate controls may include:

  • Vehicle control
  • GHRH (different mechanism)
  • GHSR antagonists
  • Quality Indicators

    Acceptable

  • Clear solution
  • Easy dissolution
  • No particles
  • Within storage guidelines
  • Signs of Degradation

  • Cloudiness
  • Particles
  • Difficulty dissolving
  • Discoloration
  • Conclusion

    Ipamorelin's selectivity for GH release without significant effects on other hormones makes it a valuable research tool for studying the GH axis. Its well-characterized structure and stability support diverse research applications in endocrinology and receptor biology.

    *Ipamorelin is sold for research purposes only and is not intended for human or veterinary use.*

    Frequently Asked Questions

    What makes Ipamorelin selective?

    Ipamorelin selectively stimulates growth hormone release without significantly affecting cortisol, prolactin, or ACTH. This selectivity is due to its specific GHSR binding properties, making it valuable for GH-focused research.

    How does Ipamorelin compare to GHRP-6?

    Both are growth hormone secretagogues, but Ipamorelin is more selective. GHRP-6 can affect cortisol and prolactin levels, while Ipamorelin has minimal effects on these hormones, making it better for isolated GH research.

    Can Ipamorelin be combined with other peptides in research?

    Yes, Ipamorelin is often studied alongside GHRH analogs like CJC-1295 or MOD GRF (1-29) to examine synergistic effects on GH release through different receptor mechanisms.

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