PEG MGF

PEG MGF (Pegylated Mechano Growth Factor)

PEG MGF is a synthetic pegylated variant of the naturally occurring splice-isoform Mechano‑Growth Factor (MGF), itself derived from the Insulin‑like Growth Factor‑1 (IGF-1) gene. It is engineered to extend the circulating lifetime of MGF via attachment of a polyethylene glycol (PEG) moiety, thereby increasing the duration of activity in research-use settings. It is intended solely for laboratory investigations and analysis.

Overview

In response to mechanical stress, muscle injury, or ischemic/ischemia-like conditions, MGF is up-regulated locally in tissues and has been implicated in activation of satellite cells, myoblast proliferation, and tissue repair processes. PEGylation of MGF is designed to enhance bioavailability, reduce clearance, and thereby facilitate extended investigation of these mechanisms in controlled research environments. Key areas of investigation include muscle regeneration, bone and cartilage defect repair, and cellular signaling associated with growth factor-mediated tissue adaptation. By extending the half-life of the peptide, PEG MGF enables longer exposure periods and experimental modelling of sustained growth factor signalling.

Chemical Composition

• Molecular Formulation: A single-chain peptide analog of the human IGF-1 Ec splice-variant (MGF) conjugated to polyethylene glycol; a definitive “molecular formula” is not provided due to variable PEG chain length.
• Mass (Batch # 2025012): 4,230.5 Da (as determined by LCMS)
• Purity (HPLC, Batch # 2025012): 98.73 %
• Form: Lyophilized white powder
• Analysis Method: Reverse-phase HPLC (UV detection 214 nm) and LCMS (ESI+ mode) calibrated with a synthetic reference standard.

Mechanism of Action & Research Utility

Satellite Cell Activation & Muscle Repair

MGF is produced in muscle fibers under mechanical overload, damage or ischemia, where it appears to initiate satellite (stem) cell proliferation and fusion, contributing to muscle fibre adaptation and repair. PEGylated MGF retains this activity with an extended half-life, making it suitable for laboratory models of muscle regeneration and hypertrophy.

Tissue-Adaptation and Growth Factor Signalling

MGF and its pegylated analogue have been reported to engage intracellular signalling cascades (e.g., MAPK/ERK) rather than exclusively the canonical IGF-1 receptor pathways, suggesting a role in local tissue repair beyond systemic IGF-1 effects. The extended exposure of PEG MGF enables exploration of sustained growth-factor signalling, cell-cycle modulation, and repair dynamics in muscle, bone, cartilage, neural and vascular studies.

Bone & Cartilage Models

Pre-clinical investigations show that MGF or MGF-E peptides (related to MGF) enhance osteoblast proliferation and promote healing in bone-defect models. PEG MGF has been employed in research examining bone repair, chondrogenesis and tissue adaptation under mechanical load or injury. As such, PEG MGF is a useful tool reagent in experimental regenerative biology and tissue engineering investigations.

Summary

PEG MGF (Batch # 2025012) has been confirmed via LCMS to have a mass of 4,230.5 Da and via HPLC to be 98.73 % pure. These analytical values verify high sample integrity and suitability for controlled research-use applications. PEG MGF remains for investigational laboratory use only and is not intended for therapeutic or diagnostic use in humans or animals.

References

1. Yang S, Cui H, Chai X, et al. Mechano growth factor, a splice variant of IGF-1, promotes neurogenesis in the aging mouse brain. Mol Brain. 2017;10:23. https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5500367/
   
2. Vassilopoulos A, Constantinou C, Clayton R, et al. MGF: a local growth factor or a local tissue repair factor? Physiology (Bethesda). 2010;25:139-149. https://physoc.onlinelibrary.wiley.com/doi/full/10.1113/expphysiol.2009.048511
   
3. Goldspink G, Li Y, Williams P, et al. Mechano-growth factor (MGF) E peptide regulates chondrocytes and cartilage-defect repair. J Orthop Res. 2023 (review). https://www.ncbi.nlm.nih.gov/pmc/articles/PMC10281885/
   
4. Kandalla PK, Goldspink G, Mouly V, Butler-Browne G. Mechano-Growth Factor E peptide derived from an isoform of IGF-1 activates human muscle progenitor cells. Mech Ageing Dev. 2011;132(4):154-162. https://pubmed.ncbi.nlm.nih.gov/21354439/
   
5. Core Peptides. PEG-MGF peptide: research in tissue repair and cell regeneration. 2023. https://www.corepeptides.com/peg-mgf-peptide-research-and-cell-regeneration/
   
6. HHM Global. Pegylated Mechano-Growth Factor peptide overview. 2024. https://hhmglobal.com/health-wellness/pegylated-mechano-growth-factor-peptide-overview
   
7. Swolverine Blog. PEG-MGF for beginners: muscle repair, dosing, and stacking guide. 2024. https://swolverine.com/blogs/blog/peg-mgf-for-beginners-muscle-repair-and-stacking-guide
   
8. TRT MD. PEG-MGF (Pegylated Mechano Growth Factor) – muscle repair and growth. 2024. https://trtmd.com/peg-mgf-muscle-repair-growth/
   
9. Clinical research database. Study of MGF analogues in muscle repair. ClinicalTrials.gov. https://clinicaltrials.gov/ct2/results?cond=Mechano-Growth-Factor

For research use only. Not for human or veterinary use.