In vitro cytocompatibility evaluation of MGF-Ct24E chemically grafted and physically blended with maleic anhydride modified poly(D, L-lactic acid).
Li. Yuxiao Y; Wang. Yuanliang Y; Wang. Pinpin P; Zhang. Bingbing B; Yan. Weiwei W; Sun. Jiaoxia J; Pan. Jun J
Key Findings
- Chemically grafted MGF‑Ct24E on modified PDLLA improves osteoblast adhesion, spreading, and proliferation versus control polymer.
- Both grafted and blended MGF‑Ct24E enhance osteoblast differentiation and mineralization, with the grafted version showing a longer‑lasting effect.
- Physical blending of the peptide is less effective over time compared to chemical grafting.
Practical Outcomes
- The findings are relevant for developing bone‑repair implants, not for personal supplementation or performance enhancement. Biohackers won’t get dosage or usage guidance from this study, so it has no direct actionable value for self‑directed health optimization.
Summary
Scientists attached a bone‑growth peptide (MGF‑Ct24E) to a biodegradable plastic and tested it with rat bone cells in the lab. The peptide‑coated material helped the cells stick, spread, multiply, and later form bone‑like mineral, especially when the peptide was chemically bonded rather than just mixed in. However, this work is about a lab‑made scaffold, not a supplement or protocol you can use yourself.
Abstract
As a growth repair factor, mechano-growth factor (MGF) and its 24 amino acid peptide analogs corresponding to the unique C-terminal E-domain (MGF-Ct24E) positively regulate bone regeneration. MGF-Ct24E was introduced into the poly(D, L-lactic acid) (PDLLA) to improve bone regeneration in our previous study. MGF-Ct24E-grafted PDLLA was chemically characterized and showed potential as a biofunctional polymer. In this study, we evaluated the cytocompatibility of MGF-Ct24E chemically grafted and physically blended with maleic anhydride modified PDLLA, relative to maleic anhydride modified PDLLA (MPLA) as the control. The surface properties of these three polymer films were characterized with scanning electron microscopy and X-ray photoelectron spectroscopy. Rat calvarial osteoblasts were seeded on the three polymer films, and cell adhesion, spreading, and proliferation were assessed with an inverted microscope, laser scanning confocal microscope, and a cell counting kit-8, respectively. The alkaline phosphatase activity and extracellular calcium production were exploited to characterize the differentiation and mineralization of rat calvarial osteoblasts on various polymer films. The results revealed that compared with MPLA, MGF-Ct24E-MPLA, and MGF-Ct24E/MPLA blends promoted adhesion, spreading, proliferation, and the later differentiation and mineralization process of rat calvarial osteoblasts. In addition, the positive effect of MGF-Ct24E-MPLA on rat calvarial osteoblasts was maintained longer than the MGF-Ct24E/MPLA blends. In conclusion, MGF-Ct24E-MPLA synthesized chemically might be a promising biomaterial for bone tissue engineering.
Study Information
pubmed
2012
2012-09-11T00:00:00.000Z
10.1080/09205063.2012.723957
5
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