PEG MGF, also known as PEGylated Mechano Growth Factor, is a polyethylene glycol conjugated synthetic peptide derived from the C-terminal E-domain of IGF-1Ec, an alternative splicing isoform of insulin-like growth factor 1. Native unmodified MGF is locally expressed within skeletal muscle tissue when muscle suffers mechanical loading, strain or injury. However, the native MGF peptide exhibits extremely short circulating half-life, only several minutes, which greatly limits its application in systemic preclinical research. PEGylation modification is adopted to covalently attach a methoxy polyethylene glycol chain to the N-terminal of the MGF peptide backbone. This PEG chain forms a protective hydration shell around the peptide molecule, shielding it from rapid enzymatic degradation and renal clearance, which drastically extends its effective duration in biological models.

The primary research target of PEG MGF lies in the activation of muscle satellite cells, which are dormant resident stem cells located between muscle fiber and basement membrane. Upon stimulation by PEG MGF, these quiescent satellite cells get activated, start proliferation and differentiation, fuse into damaged muscle fibers, and trigger the cascade of muscle protein synthesis. This biological pathway makes PEG MGF a valuable research reagent for investigating skeletal muscle regeneration, muscle injury repair and sarcopenia, the age-related muscle wasting condition. Beyond skeletal muscle research, abundant preclinical laboratory projects also explore its potential protective effects on cardiac muscle tissue after ischemic injury, bone remodeling and nerve tissue repair.

Distinct from IGF-1 itself, the MGF E-peptide fragment has its unique receptor interaction profile, enabling it to trigger satellite cell activation independent of the classic IGF-1 signaling pathway. This property provides researchers with a separate research model to dissect the divergent biological functions of different IGF-1 splice variants.

Our PEG MGF is manufactured via solid-phase peptide synthesis to assemble the full 24-amino-acid peptide chain, followed by site-selective PEGylation reaction and multi-step preparative HPLC purification. The purification workflow effectively removes unmodified raw MGF peptide, truncated fragments, residual protecting groups and unreacted PEG reagents. Each batch undergoes comprehensive quality control testing, including HPLC purity detection, mass spectrometry verification of PEG-peptide conjugate molecular identity, moisture test and visual appearance inspection. COA, HPLC chromatogram and MS spectrum documents can be provided for each shipment to meet strict laboratory record and audit requirements. Lyophilization technology is applied to lock molecular stability, minimizing conjugate degradation risk during international shipment and long-term cold storage. This product is widely supplied to university laboratories, biotech R&D centers and preclinical research institutes for skeletal muscle regeneration experiments, muscle injury recovery models, stem cell activation research, cardiac tissue protection and musculoskeletal aging related studies.