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Compound guide
MGF: what the research covers
Mechano growth factor is not an analogue of anything. It is a splice variant of IGF-1 that muscle produces when it is mechanically loaded, and the confusion on that point runs through much of the available literature.
What MGF is
The IGF-1 gene is transcribed into more than one product. When skeletal muscle is subjected to mechanical load or damage, splicing shifts towards the IGF-1Ec isoform, whose carboxy-terminal E domain differs from the common form. The twenty-four residue peptide corresponding to that unique E domain is what is sold and studied as mechano growth factor.
This matters because the obvious assumption — that MGF is a modified or truncated IGF-1 — is wrong, and it leads to the wrong expectations. MGF is a distinct gene product with its own reported activity, and published work indicates at least part of that activity does not require IGF-1R at all.
In solution the native peptide is strikingly short-lived, measured in minutes rather than hours. That single property is the reason a pegylated version exists.
Local signal, not systemic hormone
The architecture is the interesting part. IGF-1 circulates and acts broadly; MGF is produced at the site of loading and acts there. The published work centres on satellite cell activation and proliferation, early repair signalling after mechanical injury, and the time course by which the Ec isoform rises and then falls as the common isoform takes over.
For a study design, the implication is that MGF is a poor choice where sustained exposure is required and a reasonable one where the question concerns an acute local signal. An experiment that needs the latter profile will often run MGF against PEG-MGF precisely to separate the effect of the signal from the effect of its duration.
How Amino Club supplies it
Supplied lyophilised in sealed vials as MGF, specified at 99% purity or better by HPLC with identity confirmed by mass spectrometry and released against the Certificate of Analysis for its own batch, as described on the lab testing page.
The dry powder is far more stable than the peptide in solution, which in this case is not a general caution but the governing constraint: solutions are prepared in small volumes immediately before use, kept cold and dark, and not held. Sealed vials tolerate ambient transit and are stored below −18 °C. Diluents are listed under reconstitution supplies.
Related reading
MGF belongs to the growth hormone research peptides group with PEG-MGF, IGF-1 LR3 and HGH 191AA. Because the literature is largely about repair after mechanical loading, the tissue repair research peptides hub is also relevant.
Every guide is indexed in the research library. Certificates and storage are covered on the FAQ, quantity pricing through bulk and wholesale.
Research use only
MGF supplied by Amino Club is a laboratory reference material. It is not a medicine, not a supplement, and not for human or veterinary use, and no dosing guidance or administration protocol is provided. The full terms are in the research use policy.