What is MGF (C-terminal)?

MGF (C-terminal) is the C-terminal peptide fragment derived from Mechano Growth Factor (MGF), a splice variant of IGF-1 expressed in skeletal muscle following mechanical loading or injury. MGF has been investigated for roles in repair, remodeling, and local anabolic signaling. The C-terminal fragment is used in research to probe region-specific contributions of MGF to muscle adaptation and regeneration pathways.

Provided as a 2mg lyophilized vial, this peptide is intended solely for controlled laboratory studies.

Mechanism of Interest

Endogenous MGF is upregulated in response to muscle stretch or damage, where it is linked to activation of satellite cells and early phases of myogenesis. Studying the isolated C-terminal region helps researchers examine sequence-dependent effects on receptor cross-talk, extracellular matrix (ECM) remodeling, and downstream signaling that differs from systemic IGF-1 activity.

• Focus on local, injury-responsive IGF-1 isoform signaling
• Early repair cues and progenitor cell activation
• Differential effects vs. full-length IGF-1 and other isoforms

Key Research Applications

• Muscle injury and recovery timelines in skeletal muscle
• In vitro myoblast proliferation and differentiation models
• ECM remodeling and angiogenesis markers in repair phases
• Comparative studies vs. PEG-MGF and IGF-1 variants
• Exercise/loading-induced adaptation paradigms

Because the C-terminal region may emphasize local signaling, protocols often measure satellite-cell markers, myogenic regulatory factors, and functional recovery indices.

Chemical Profile & Handling

Form: Lyophilized peptide (2mg per vial) for reconstitution in appropriate research-grade diluent.
Notes: Sequence length and composition are specific to the C-terminal region of MGF and may exhibit distinct physicochemical properties vs. native MGF or IGF-1.

Researchers typically optimize concentration to align with target endpoints (e.g., satellite cell activation, ECM markers). Document buffer composition, pH, and any carrier proteins used to maintain stability and reproducibility.

Study Design Considerations

• Define primary endpoints (e.g., Pax7+, MyoD/MyoG expression, fiber CSA, force recovery).
• Use time-course sampling to capture early (inflammatory) vs. mid-phase (regenerative) signals.
• Contrast localized MGF signaling with systemic IGF-1 to delineate pathway specificity.
• Include proper controls and document storage/handling to minimize peptide degradation.

Comparison to Related Compounds

PEG MGF: Pegylation extends circulation time and is useful when sustained exposure is desired; the non-PEG C-terminal fragment can help isolate short-window, region-specific effects.
IGF-1 (systemic): Broader metabolic actions; often used as a comparator to highlight local vs. systemic outcomes in regeneration research.
Repair-focused peptides: Studies may include TB-500/Tβ4 and BPC-157 for mechanistic contrasts (actin dynamics, angiogenesis, ECM remodeling).

Storage & Stability

Store dry vials at −20°C, protected from light and moisture. After reconstitution, keep at 2–8°C and use within a protocol-appropriate timeframe. Avoid repeated freeze–thaw cycles. Handle using aseptic technique and appropriate PPE.

For Research Use Only

MGF (C-terminal) 2mg is intended exclusively for laboratory research by qualified personnel. Not for human or veterinary use. Users are responsible for compliance with all applicable regulations and institutional policies.

• Mechano Growth Factor – Wikipedia
• IGF-1 – Wikipedia
• Satellite Cell – Wikipedia
• Skeletal Muscle – Wikipedia
• Myogenesis – Wikipedia