MGF (Mechanischer Wachstumsfaktor)

MGF — Mechano Growth Factor (IGF-1Ec Splice Variant) Research Peptide

Mechano Growth Factor (MGF) is a naturally occurring alternative splice variant of the insulin-like growth factor-1 (IGF-1) gene, designated IGF-1Ec. It is produced locally in skeletal muscle in response to mechanical load and tissue damage, distinct from systemic hepatic IGF-1 (the IGF-1Ea splice variant). In research, MGF is the reference “local repair” IGF-1 isoform – it is the peptide that the myofiber itself releases after a mechanical stimulus, and its research utility comes from its role as the early signal that activates satellite cells before systemic IGF-1 arrives.

Why the IGF-1Ec Splice Matters

IGF-1 is encoded by a single gene that can splice into two distinct isoforms. IGF-1Ea is the systemic, liver-secreted form that drives long-term anabolic endpoints. IGF-1Ec (MGF) is the locally-expressed, load-induced form that is produced inside the muscle and released after damage. The two forms share the IGF-1 core but differ in their C-terminal E-peptide. The E-peptide of MGF is the distinguishing research feature – it gives MGF a different local-tissue signaling profile than systemic IGF-1, and it is what makes MGF the reference satellite-cell-activating isoform in published work.

MGF vs IGF-1

The two isoforms are compared constantly in the muscle-repair research literature. They come from the same gene but differ in splice variant and downstream role.

Forschungsanwendungen

MGF is used in studies examining:

• Satellite cell activation and myogenic proliferation endpoints
• Load-induced local muscle repair and hypertrophy models
• E-peptide signaling and IGF-1Ec-specific pathways
• Comparative isoform research (MGF vs systemic IGF-1)
• Age-related muscle regenerative-capacity decline
• Cardiac-muscle repair research (MGF is also expressed in cardiomyocytes)

Technische Daten

Rekonstitution

MGF arrives as a freeze-dried powder and is reconstituted with bacteriostatic water:

Gesamtmenge in mg im Fläschchen ÷ hinzugefügte Wassermenge in ml = mg pro ml

Example: a 2mg vial + 2mL of bacteriostatic water = 1mg per mL.

Once reconstituted, store at 2-8°C and use within 28-30 days. Native MGF has a notoriously short plasma half-life – the PEG-MGF variant was developed to extend it, but non-PEGylated MGF remains the reference unmodified splice variant in comparative research.

Anmerkungen zum Protokoll

The following values are reference points extracted from published MGF research – not instructions. Because MGF acts locally and has a short circulating half-life, published protocols typically use site-specific or post-load-window administration rather than systemic long-interval dosing.

• Dose range reported in the literature: 100-400mcg per administration
• Administration frequency in published studies: Administered near the mechanical-load window; typically daily for short loading periods
• Study durations reported: 2-6 week windows aligned with muscle-repair endpoint studies

Common Questions About MGF Research

What is MGF used for in research?

It is studied as the reference IGF-1Ec splice variant. Published work covers satellite cell activation, load-induced local muscle repair and hypertrophy, E-peptide-specific signaling, and comparative isoform research against systemic IGF-1.

What is the difference between MGF and IGF-1?

MGF (IGF-1Ec) and IGF-1 (IGF-1Ea) are splice variants of the same gene. They share the IGF-1 core but have different C-terminal E-peptides. MGF is produced locally inside muscle fibers in response to mechanical load and activates satellite cells. Systemic IGF-1 is liver-secreted and drives longer-term anabolic endpoints. The splice-variant distinction is the reason the two are studied as separate compounds despite sharing a common receptor.

What is the difference between MGF and PEG-MGF?

PEG-MGF is a polyethylene-glycol-conjugated variant of MGF engineered to extend its plasma half-life. Non-PEGylated MGF has a very short circulating half-life (on the order of minutes) because it is designed for local action, not systemic signaling. PEG-MGF research addresses that PK limitation; native MGF remains the reference unmodified IGF-1Ec variant.

Is MGF FDA approved?

No. MGF is not an FDA-approved drug product. It is a research peptide. Every vial WWP ships is labeled and sold strictly for laboratory and research use only.

How is MGF stored?

Ungeöffnete Fläschchen werden bei 2–8 °C gelagert und sind mindestens 12 Monate haltbar. Nach der Rekonstitution mit bakteriostatischem Wasser wird die Lösung bei 2–8 °C aufbewahrt und innerhalb von 28–30 Tagen verbraucht.

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