50mg Mk677
High-purity 50mg MK677 (Ibutamoren mesylate) provides laboratory researchers with a standardized reference mass of an orally bioavailable, non-peptidic ghrelin receptor agonist. Preclinical investigations utilize this compound to evaluate GHSR-1a receptor signaling, pulsatile growth hormone secretion, and downstream IGF-1 expression in controlled experimental models.
Quick answer
High-purity 50mg MK677 (Ibutamoren mesylate) provides laboratory researchers with a standardized reference mass of an orally bioavailable, non-peptidic ghrelin receptor agonist. Preclinical investigations utilize this compound to evaluate GHSR-1a receptor signaling, pulsatile growth hormone secretion, and downstream IGF-1 expression in controlled experimental models.
Key takeaways
- A 50mg MK677 reference quantity represents a standardized mass of Ibutamoren mesylate, a potent, non-peptidic agonist of the growth hormone secretagogue receptor (GHSR-1a).
- MK-677, chemically designated as N-[1(R)-[[12-(methylsulfonyl)amino]-2-oxo-1,2-dihydro-spiro[3H-indole-3,4'-piperidin]-1'-yl]carbonyl]-2-(phenylmethoxy)ethyl]-2-amino-2-methylpropanamide, is structurally classified as a spiroindoline.
- In vitro assays and rodent models demonstrate that MK-677 administration produces robust, sustained elevations in circulating plasma growth hormone and insulin-like growth factor 1 (IGF-1).
- To contextualize secretagogue potency and signaling kinetics, researchers frequently compare MK-677 against classical peptide-based secretagogues.
Definition and Preclinical Role of 50mg MK677
A 50mg MK677 reference quantity represents a standardized mass of Ibutamoren mesylate, a potent, non-peptidic agonist of the growth hormone secretagogue receptor (GHSR-1a). In laboratory settings, this specific quantity enables researchers to prepare precise stock solutions for investigating secretagogue activity, receptor kinetics, and somatotropic axis upregulation in vitro and in vivo animal models.
Unlike short-acting synthetic peptides, MK-677 exhibits structural stability that resists rapid enzymatic degradation. Studies in our research library hub detail how this small molecule mimics the endogenous peptide hormone ghrelin. By selectively binding to GHSR-1a in central and peripheral tissues, it triggers signal transduction cascades that prompt the anterior pituitary gland to release endogenous growth hormone (GH) without interrupting physiological feedback mechanisms.
Molecular Structure and GHSR-1a Receptor Activation
MK-677, chemically designated as N-[1(R)-[[12-(methylsulfonyl)amino]-2-oxo-1,2-dihydro-spiro[3H-indole-3,4'-piperidin]-1'-yl]carbonyl]-2-(phenylmethoxy)ethyl]-2-amino-2-methylpropanamide, is structurally classified as a spiroindoline. This non-peptide structure confers high selectivity and affinity for the G-protein coupled receptor GHSR-1a, located predominantly in the hypothalamus and pituitary gland.
Upon receptor activation, MK-677 initiates intracellular phosphoinositide hydrolysis, generating inositol trisphosphate (IP3) and diacylglycerol (DAG). This cascade mobilizes intracellular calcium stores and activates protein kinase C, ultimately leading to the exocytosis of GH-containing vesicles. In preclinical assays, researchers evaluate how this mechanism differs from traditional direct GH administration, focusing on how MK-677 preserves natural pulsatile release patterns.
Preclinical Literature: GH and IGF-1 Elevation Mechanisms
In vitro assays and rodent models demonstrate that MK-677 administration produces robust, sustained elevations in circulating plasma growth hormone and insulin-like growth factor 1 (IGF-1). Literature indicates that a single laboratory administration can sustain GHSR-1a activation over an extended half-life period relative to short-lived synthetic peptides.
Crucially, preclinical evidence reveals that MK-677 amplifies GH secretion while maintaining baseline circulating levels of cortisol, prolactin, and thyroid-stimulating hormone (TSH) within standard physiological ranges under controlled conditions. Researchers studying metabolism often reference our comprehensive guide on MK-677 mechanism dynamics to assess its impact on nitrogen retention, lipid oxidation, and lean tissue preservation in preclinical disease models.
Comparative Analysis: MK-677 vs. Synthetic Peptide Secretagogues
To contextualize secretagogue potency and signaling kinetics, researchers frequently compare MK-677 against classical peptide-based secretagogues. While MK-677 is an orally active non-peptide compound with an extended elimination half-life, traditional secretagogues rely on parenterally administered amino acid chains that engage distinct surface receptors.
For instance, compounds such as CJC-1295 No DAC act on the growth hormone-releasing hormone receptor (GHRHR), whereas Ipamorelin acts selectively on GHSR-1a with a shorter systemic duration. Additionally, comparative studies involving Hexarelin highlight differences in receptor desensitization rates, as MK-677 maintains persistent receptor activity without rapid downregulation in long-term rodent models. Researchers evaluating diverse pathways often cross-reference these profiles across our complete research compound library.
Laboratory Handling, Solubility, and Storage Parameters
Maintaining chemical integrity during laboratory manipulation requires strict adherence to physical storage parameters. MK-677 mesylate is a crystalline powder that exhibits high solubility in polar organic solvents, such as dimethyl sulfoxide (DMSO) and ethanol, as well as moderate solubility in aqueous buffers once solubilized.
For long-term preservation, raw 50mg MK677 powder should be stored desiccated at -20°C, protected from ambient moisture and direct UV light exposure. When reconstituting stock solutions for cell culture or preclinical assays, investigators should utilize sterile, research-grade solvents. Aliquoting reconstituted stock solutions minimizes freeze-thaw cycles that could induce hydrolysis or compound degradation over time.
Purity Verification: HPLC, Mass Spectrometry, and COA Standards
Analytical rigor is non-negotiable when conducting quantitative biochemical research. PX1 Research subjects every batch of MK-677 50mg to rigorous verification protocol using modern chromatographic and spectroscopic techniques.
Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) confirms molecular purity exceeding 99%, ensuring the absence of unreacted synthetic intermediates or related side-products. Concurrently, Electrospray Ionization Mass Spectrometry (ESI-MS) verifies the exact molecular weight and structural identity. Every lot is accompanied by a publicly verifiable Certificate of Analysis (COA) directly reflecting these independent laboratory findings.
Endotoxin Control and Regulatory Safety Standards for In Vitro Assays
Bacterial endotoxins (lipopolysaccharides) pose a significant threat to cell culture viability and biological assay reproducibility, often causing non-specific inflammatory responses that confound experimental data. PX1 Research enforces stringent endotoxin limits across all laboratory reagents.
Utilizing chromogenic Limulus Amebocyte Lysate (LAL) testing, our analytical partners verify that endotoxin levels remain below strict threshold limits (<0.01 EU/mg). This level of quality control ensures that observed cellular responses are attributable strictly to GHSR-1a agonism rather than immunogenic contaminants.
In Vitro and Animal Model Experimental Applications
In current preclinical literature, 50mg MK677 mass units are utilized across a broad array of experimental designs. Investigators employ the compound to evaluate somatotroph cell signaling, GH secretagogue receptor density alterations, and downstream transcriptomic changes in hepatic tissue responsible for IGF-1 synthesis.
Additionally, animal models exploring metabolic dysfunction, skeletal muscle wasting, and bone mineral density preservation frequently incorporate MK-677 to measure systemic anabolic markers. Facilities requiring large-scale reagent supplies for extensive study protocols can explore our dedicated wholesale laboratory portal to coordinate bulk procurement and lot-matched consistency.
PX1 Research Advantage: USA Manufacturing and Quality Control
PX1 Research maintains an unyielding commitment to domestic manufacturing standards, synthesizing all research compounds within GMP-compliant, US-based facilities. Every lot undergoes testing in independent ISO 17025 accredited laboratories to ensure absolute compliance with purity, identity, and safety specifications.
To support fast-paced research environments, orders ship directly from our centralized fulfillment hubs in California and Arizona with same-day dispatch for orders placed Monday through Friday. When sourcing reagents from PX1 Research, laboratory teams gain complete supply chain transparency, backed by lot-traceable COAs and robust analytical data.
Frequently Asked Questions
What is 50mg MK677 used for in laboratory research?
A 50mg mass of MK677 (Ibutamoren) serves as a standardized reference material used in preclinical laboratory settings to evaluate ghrelin receptor (GHSR-1a) signaling, growth hormone secretagogue activity, and downstream IGF-1 expression in vitro and in animal models.
How does MK677 differ from peptide-based secretagogues?
Unlike peptide secretagogues like Ipamorelin or CJC-1295, MK677 is a non-peptidic small molecule with oral bioavailability and a significantly longer systemic elimination half-life, allowing for persistent GHSR-1a receptor stimulation without rapid enzymatic cleavage.
What solvents are recommended for reconstituting 50mg MK677 powder?
MK677 mesylate is readily soluble in dimethyl sulfoxide (DMSO) and ethanol. Aqueous buffers can also be utilized for final working dilutions depending on specific cell culture or assay protocols.
How should 50mg MK677 powder be stored in the lab?
Lyophilized or crystalline MK677 powder should be stored desiccated at -20°C away from light and heat. Liquid stock solutions should be aliquoted and frozen to prevent stability loss from repeated freeze-thaw cycles.
How does PX1 Research verify the purity of MK677?
PX1 Research verifies every lot using Reverse-Phase High-Performance Liquid Chromatography (RP-HPLC) to confirm >99% purity and Mass Spectrometry (MS) to verify molecular identity. All data are published on lot-specific COAs.
Are PX1 Research compounds tested for endotoxins?
Yes. Every batch undergoes chromogenic LAL testing to ensure endotoxin levels fall well below strict research thresholds, preventing non-specific inflammatory responses in cellular and animal assays.
Where are PX1 Research compounds synthesized and shipped from?
All PX1 Research compounds are synthesized in GMP-compliant facilities within the United States and shipped directly from fulfillment centers in California and Arizona.
Is 50mg MK677 approved for human therapeutic use?
No. MK677 provided by PX1 Research is strictly intended for laboratory research and in vitro evaluation only. It is not for human consumption, medical, clinical, or diagnostic use.
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