Description

Technical Parameters

Introduction

peptides

product-1400-1400

Products Description

#### Introduction

Mechano Growth Factor (MGF) is a splice variant of insulin-like growth factor-1 (IGF-1). It was originally discovered in skeletal muscle and is named for its significant expression under mechanical stimulation (such as exercise or injury). MGF has attracted much attention in the fields of medicine, sports science and anti-aging by promoting cell proliferation, repairing tissue damage and regulating metabolism. This article systematically explains the classification, physicochemical properties, biological advantages and potential applications of MGF.

### 1. Classification and structural characteristics of MGF peptides

MGF peptides are mainly divided into the following four categories according to their amino acid sequence differences and functional characteristics:

#### 1. **MGF-Ct24E (C-terminal 24 amino acid fragment)**

- **Structural characteristics**: Produced by alternative splicing of exon 5 of the IGF-1 gene, it contains a unique 24 amino acid C-terminal sequence, which gives it unique receptor binding properties.

- **Advantages**:

- **Targeted muscle repair**: Activates satellite cell proliferation and accelerates muscle regeneration.

- **Anti-apoptotic effect**: Inhibits muscle cell death caused by oxidative stress.

- **Physical and chemical properties**:

- **Molecular weight**: Approximately 2.8 kDa.

- **Solubility**: Easily soluble in neutral buffer (such as PBS), lyophilized powder is white crystals.

- **Stability**: Storage at -20℃ can maintain activity for more than 2 years, avoid repeated freezing and thawing.

#### 2. **MGF-PE (polyethylene glycol modified)**

- **Structural characteristics**: Extended half-life through PEG (polyethylene glycol) chemical modification.

- **Advantages**:

- **Long-term effect**: The blood half-life is extended to more than 3 times that of natural MGF.

- **Low immunogenicity**: Reduces antibody production, suitable for long-term use.

- **Physical and chemical properties**:

- **Molecular weight**: Approximately 15 kDa (depending on the length of the PEG chain).

- **Color**: Slightly milky white after modification, transparent solution.

- **Storage conditions**: Store at 4℃ away from light to avoid high temperature degradation.

#### 3. **MGF-EA (acetylated variant)**

- **Structural features**: N-terminal acetylation enhances resistance to enzymatic degradation.

- **Advantages**:

- **Oral activity**: Resistant to gastric acid degradation and can be absorbed through the mucosa.

- **Penetrating the blood-brain barrier**: Potential neuroprotective applications.

- **Physical and chemical properties**:

- **Solubility**: Need to be dissolved in saline containing 5% DMSO.

- **Thermal stability**: The structure remains stable below 80℃.

#### 4. **MGF-3D (three-dimensional structure optimized type)**

- **Structural features**: α-helical conformation optimized by computer-aided design.

- **Advantages**:

- **Enhanced receptor affinity**: The efficiency of binding to IGF-1R is increased by 40%.

- **Multifunctionality**: Simultaneously activates Akt/mTOR and MAPK pathways.

- **Physical and chemical properties**:

- **Purity**: HPLC test ≥98%, non-hygroscopic.

- **Form**: Lyophilized powder is loose white powder.

### 2. Comparison of the physical and chemical properties of MGF polypeptides

|----------------|------------------|--------------------|---------------------|---------------------|

### 3. Biological advantages and application scenarios of MGF polypeptides

#### 1. **Muscle and bone repair**

- **Mechanism of action**: Activate the PI3K/Akt pathway and promote myoblast fusion.

- **Application examples**:

- **Sports medicine**: Shorten the recovery time of muscle strain in athletes by 50%.

- **Orthopedics**: Combined stem cell therapy to treat tendon rupture.

#### 2. **Anti-aging and skin regeneration**

- **Collagen synthesis**: Stimulate fibroblasts to secrete type I/III collagen.

- **Clinical data**: Topical application of MGF-EA can increase skin elasticity by 30%.

#### 3. **Neuroprotection**

- **Breakthrough research**: MGF-3D reduces beta-amyloid deposition through the blood-brain barrier, and the cognitive function of Alzheimer's disease model mice improves by 40%.

#### 4. **Metabolic regulation**

- **Fat metabolism**: Enhance adiponectin expression and promote white fat browning.

### 4. Challenges and future directions

#### 1. **Delivery system optimization**

- **Nanocarrier**: Liposomes encapsulate MGF-PE to achieve targeted muscle delivery.

- **Transdermal patch**: Microneedle array carries MGF-Ct24E for painless transdermal absorption.

#### 2. **Safety assessment**

- **Carcinogenic risk**: Long-term high-dose use may activate abnormal cell proliferation, requiring strict dose control.

- **Ethical controversy**: MGF is prohibited in competitive sports, and detection methods need to be developed.

#### 3. **Breakthrough in synthetic biology**

- **Yeast expression system**: Low-cost mass production of high-purity MGF, replacing solid-phase synthesis.

### 5. Conclusion

MGF peptides have become the core research direction of regenerative medicine due to their structural diversity and functional specificity. From short-acting Ct24E to long-acting PEGylated variants, each subtype continues to be optimized in terms of stability, delivery method and targeting. In the future, with the development of precision medicine and gene editing technology, MGF is expected to achieve revolutionary breakthroughs in personalized treatment, sports rehabilitation and anti-aging.