Mechano Growth Factor (MGF)
Preclinical ResearchMechano Growth Factor (MGF)
A splice variant of IGF-1 that is locally produced in muscle tissue following exercise-induced damage. Researched for muscle repair and growth.
Dose
100-200 mcg
Route
SubQ injection, Intramuscular
Cycle
4-8 weeks
Storage
Refrigerated (2-8°C / 36-46°F) away from light
What is Mechano Growth Factor (MGF)?
Mechano Growth Factor (MGF) is a splice variant of Insulin-like Growth Factor-1 (IGF-1) that is expressed in muscle tissue in response to mechanical stress and damage, such as that induced by exercise. It plays a localized role in muscle repair and growth, primarily through the activation of muscle satellite cells (muscle stem cells) and promotion of protein synthesis. Unlike systemic IGF-1, MGF is thought to act more locally and transiently, particularly focusing on the initial stages of muscle regeneration and hypertrophy. Research often distinguishes between the rapidly degraded standard MGF and PEGylated MGF (PEG-MGF), where the addition of polyethylene glycol significantly extends its half-life, allowing for less frequent administration in research protocols.
Key Benefits
- Muscle satellite cell activation
- Local muscle repair
- Post-exercise recovery
- Muscle hypertrophy support
Mechanism of Action
- Activates muscle stem cells locally
- Promotes protein synthesis in damaged muscle
- Different signaling pathway from systemic IGF-1
Best For
- Muscle repair research
- Post-workout recovery research
Body Systems
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Molecular Information
Molecular weight
2867.2 g/mol (for human MGF E peptide)
Length
24 amino acids (MGF E peptide)
Type
Peptide
Amino acid sequence
YQPPSTNKNTKSQ
This sequence represents the MGF E peptide, which is the C-terminal portion of the IGF-1Ec splice variant. The full IGF-1Ec sequence is longer.
Pharmacokinetics
Half-life
0.05 h
Standard MGF has a very short half-life (minutes), whereas PEGylated MGF can extend this to days.
Research Indications
Localized Muscle Repair
Research indicates MGF's role in facilitating local muscle repair processes following exercise-induced damage by stimulating satellite cell activation and proliferation.
Muscle Satellite Cell Activation
Studies have shown MGF's ability to activate quiescent muscle stem cells, crucial for muscle regeneration and growth.
Protein Synthesis
MGF is commonly researched for its direct effect on promoting protein synthesis within damaged muscle tissue, contributing to muscle rebuilding.
Research Protocols
| Goal | Dose | Frequency | Route |
|---|---|---|---|
| Localized Muscle Hypertrophy (Standard MGF) | 100-200 mcg per target muscle | 1-2 times per week (post-workout) into specific muscle groups | Intramuscular |
| Enhanced Systemic Muscle Growth (PEG-MGF) | 200-500 mcg | 1-2 times per week | Subcutaneous |
| Acute Muscle Repair & Recovery (Standard MGF) | 100-150 mcg per target muscle | Immediately post-workout for the specific muscle trained | Intramuscular |
| Extended Recovery and Growth Support (PEG-MGF) | 200-300 mcg | Every 3-4 days | Subcutaneous |
Due to its localized and transient nature, MGF is commonly discussed in research contexts for targeted application post-workout to specific muscle groups, aiming to capitalize on the acute recovery and growth processes.
Peptide Interactions
- Synergistic
IGF-1 LR3
Some research protocols combine MGF with IGF-1 LR3, theorizing that MGF initiates satellite cell activation, while IGF-1 LR3 supports later stages of muscle growth and differentiation, though specific interaction mechanisms are still under investigation.
- Compatible
Growth Hormone (GH) Secretagogues (e.g., GHRPs, GHRH analogues)
These compounds increase systemic GH levels, which in turn can influence IGF-1 production. MGF acts locally, so a combined approach might provide both systemic and local anabolic effects without direct interaction concerns, but research is limited.
- Monitor Combination
Insulin
Both MGF and insulin can influence nutrient partitioning and cellular growth. While not a direct contraindication, close monitoring of metabolic parameters is advisable if combining due to potential additive effects on cell signaling pathways.
- Use Caution
Corticosteroids
Corticosteroids generally have catabolic effects on muscle tissue and can impair healing. This might counteract the anabolic and regenerative actions of MGF, making combined research less effective or potentially antagonistic.
How to Reconstitute
- 1Gather materials: MGF vial, bacteriostatic water vial, sterile syringes (one for reconstitution, one for administration), alcohol wipes.
- 2Wipe the rubber stoppers of both the MGF vial and the bacteriostatic water vial with alcohol wipes and allow to air dry.
- 3Using a sterile syringe, draw the desired amount of bacteriostatic water (commonly 1-2 ml) from its vial.
- 4Slowly inject the bacteriostatic water into the MGF vial, directing the water to the sides of the vial rather than directly onto the lyophilized powder.
- 5Do not shake the vial. Gently swirl the vial to facilitate dissolution of the powder. If necessary, allow it to sit in a refrigerator for 15-30 minutes and swirl again.
- 6Once fully dissolved, the solution should be clear and free of particles. Store reconstituted solution as recommended.
Always reconstitute with bacteriostatic water. The peptide vial should be allowed to reach room temperature before reconstitution.
What to Expect
- Weeks 1-2: Initial observations may include enhanced recovery from training and slight increases in muscle fullness in targeted areas.
- Weeks 3-4: More noticeable improvements in muscle repair and potentially localized growth in specific muscle groups researched.
- Weeks 5-6: Consistent observations of improved recovery, increased muscle mass, and strength gains in targeted musculature.
- Weeks 7-8: Peak effects of localized muscle hypertrophy and repair processes may be observed, depending on the research protocol.
- Post-cycle: Any observed gains are generally maintained through continued training and proper nutrition, though some transient effects may diminish.
Side Effects & Safety
| Effect | Frequency | Severity |
|---|---|---|
| Injection site pain | Common | Mild |
| Headache | Uncommon | Mild |
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Open CalculatorPeptides discussed here are for research purposes only. Nothing on this page is medical advice. Always consult a qualified professional before making health decisions.