MGF (Mechano-Growth Factor)

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.

Research Applications

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)

Specifications

Storage & Handling

Unopened vials are kept at 2-8°C under standard cold-chain conditions and remain stable for 12+ months. Reconstitution parameters, solvent compatibility, and post-reconstitution stability for MGF (Mechano-Growth Factor) are documented in the published peer-reviewed literature and standard peptide-chemistry references.

Reference Literature

Published clinical and preclinical MGF (Mechano-Growth Factor) literature is available through PubMed, Google Scholar, and other peer-reviewed databases. WWP does not provide protocol design, dosing guidance, or administration parameters. Those decisions rest with the researcher and any applicable institutional review board.

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?

Unopened vials are stored at 2-8°C and stay stable for 12+ months. Once reconstituted with bacteriostatic water, the solution is kept at 2-8°C and used within 28-30 days.

Purity Guarantee

Every batch is ≥99% purity. Send us a COA from any independent test and we’ll issue store credit regardless of what it shows.