IGF-1 DES (2 mg) – Research Peptide

IGF-1 DES (Insulin-Like Growth Factor-1 Des(1-3)) is a truncated analog of human IGF-1 lacking the first three N-terminal amino acids. This modification significantly reduces IGF-binding-protein affinity, increasing its bioavailability and potency at the IGF-1 receptor (IGF-1R).
In research settings, IGF-1 DES is widely used to study muscle hypertrophy, cellular proliferation, tissue repair, and growth-factor signaling dynamics.

Specifications

Synonyms: Des(1-3) IGF-1, truncated IGF-1 analog
Molecular Formula: C319H552N98O101S7
Molecular Weight: ~9,200 Da
Class: IGF-1 receptor agonist / growth-factor analog
Sequence: TFAED… (full human-analog sequence minus first 3 amino acids)

Mechanism of Action

IGF-1 DES displays ~10× higher receptor affinity than native IGF-1 due to its reduced interaction with IGF-binding proteins (IGFBPs).
Key experimental mechanisms include:

1. Potent IGF-1R Activation

IGF-1 DES binds IGF-1R, triggering:

• PI3K → Akt → mTOR pathway activation

• Protein synthesis

• Myoblast differentiation

• Satellite cell proliferation

Florini et al. showed enhanced myogenic differentiation and accelerated muscle-fiber maturation in vitro.

2. Reduced IGFBP Binding = Higher Local Potency

Removing the first three amino acids lowers IGFBP-3 affinity by ~90%, resulting in:

• Greater free IGF-1 activity

• Increased receptor activation at the injection site

• Shorter systemic half-life but more potent localized effects

3. Synergy With Mechanical Load

Experimental data shows IGF-1 DES amplifies mechano-growth signaling in skeletal muscle:

• Satellite cell activation

• Increased muscle fiber cross-sectional area

• Enhanced collagen remodeling in tendons

IGF-1 DES and Muscle Biology

Skeletal Muscle Hypertrophy

In rodent studies, muscle fiber diameter increased significantly following localized IGF-1 DES administration (Adams et al.).

Myoblast Proliferation

IGF-1 DES stimulates:

• MyoD expression

• Myogenin transcription

• Enhanced fusion of myocytes into mature fibers

Recovery From Injury

Experimental models show accelerated repair after:

• Muscle laceration

• Denervation injury

• Mechanical overload

Neural & Cognitive Research

Though not a cognitive peptide per se, IGF-1 signaling is involved in:

• Neurogenesis

• CNS repair

• Synaptic survival

• Anti-apoptotic pathways (Akt-dependent)

Rodent models demonstrated improved neuronal survival after ischemic or oxidative injury when IGF-1 DES was used locally.

IGF-1 DES and Collagen / Tendon Remodeling

Experimental use suggests:

• Increased fibroblast proliferation

• Enhanced type-I collagen deposition

• Faster tendon healing after mechanical stress

These effects appear mediated through IGF-1R-Akt-mTOR pathways within tendon fibroblasts.

Metabolic Effects

In vitro and in vivo studies indicate IGF-1 DES may:

• Increase glucose uptake via Akt signaling

• Enhance glycogen storage

• Improve insulin sensitivity in skeletal muscle

However, its short half-life limits systemic metabolic impact.

Other Experimental Applications

Bone Biology

IGF-1 DES promotes osteoblast proliferation and bone-matrix deposition in culture models.

Tissue Engineering

Used experimentally in:

• Bioengineered muscle grafts

• Collagen scaffold enhancement

• Stem-cell differentiation trials

Cellular Growth & Repair Models

Because of its potency, IGF-1 DES is widely used in laboratories studying:

• Anabolism

• Wound healing

• Growth-factor signaling

• Cell-cycle progression

Research Use Only – Important Notice

This IGF-1 DES 2 mg product is supplied exclusively for laboratory research purposes.

• Not for human or veterinary use

• Not for diagnostic, therapeutic, or cosmetic applications

• Intended for in vitro studies and/or controlled experimental animal research

• All descriptions summarize preclinical findings only

• Not to be interpreted as medical guidance or claims

References

1. Florini JR, Ewton DZ, Coolican SA. Growth hormone and the insulin-like growth factor system in myogenesis. Endocrine Reviews.
   https://doi.org/10.1210/edrv-17-5-481

2. Adams GR, Haddad F. The relationships among IGF-1, IGF binding proteins, and muscle mass in resistance-trained humans. Growth Horm IGF Res.
   https://doi.org/10.1016/S1096-6374(96)80354-2

3. Shavlakadze T, Grounds MD. Impact of IGF-1 on recovery from skeletal muscle injury. BMC Musculoskeletal Disorders.
   https://doi.org/10.1186/1471-2474-7-41

4. Duan C. Role of IGF system in muscle growth and development. General and Comparative Endocrinology.
   https://doi.org/10.1016/j.ygcen.2015.10.011

5. Carro E et al. Circulating IGF-1 regulates brain neurogenesis and neuroprotection. Nature Neuroscience.
   https://doi.org/10.1038/nn733

6. Yakar S et al. The role of the GH/IGF axis in skeletal development. Endocrinology.
   https://doi.org/10.1210/en.2008-0632

7. Steinbacher P, Eckl P. IGF-1 signaling in skeletal muscle repair. Journal of Muscle Research & Cell Motility.
   https://doi.org/10.1007/s10974-016-9450-6