Injectable Hydrogel Releases Hydrogen to Heal Bone Defects in Diabetes
- Authors
- Mengyu Pei, Peizhe Li, Xueqiang Guo, Mengnan Wen, Yan Gong, Pei Wang, Zhenlin Fan, Lei Wang, Xiansong Wang, Wenjie Ren
- Journal
- ACS Biomaterials Science & Engineering
- Year
- 2024
- DOI
- 10.1021/acsbiomaterials.4c00162
- Study Type
- Cell Culture
- Outcome
- Positive
- Peer Reviewed
- Yes
- Country
- China
- Health Condition
- Diabetes
- Body System
- Musculoskeletal
TL;DR
Researchers developed a new injectable material that helps heal bone damage in diabetics by reducing inflammation and stress, and promoting the growth of new blood vessels and bone tissue.
Key Finding
An injectable scaffold that releases hydrogen gas and magnesium ions reduced oxidative stress and inflammation markers in cell cultures, and promoted the type of immune cell activity associated with tissue repair.
Summary
Researchers developed a new injectable material designed to help repair bone damage in people with diabetes. The material contains magnesium hydride and releases both hydrogen gas and magnesium ions as it breaks down in the body. These released substances are intended to reduce inflammation and oxidative stress (cellular damage from harmful molecules), while also promoting the growth of new blood vessels and bone tissue. This study tested the concept in cell cultures, not in animals or humans.
Practical Takeaway
This is very early-stage research conducted only in cell cultures, so it cannot yet tell us whether this approach would work in actual bone healing or in people with diabetes. While the mechanism is theoretically promising, many years of animal and human testing would be needed before any clinical use. This study does not provide evidence that hydrogen water or magnesium supplements would have similar effects.
Abstract
Diabetic bone defects, exacerbated by hyperglycemia-induced inflammation and oxidative stress, present significant therapeutic challenges. This study introduces a novel injectable scaffold, MgH2@PLGA/F-GM, consisting of foamed gelatin-methacryloyl (GelMA) and magnesium hydride (MgH2) microspheres encapsulated in poly(lactic-co-glycolic acid) (PLGA). This scaffold is uniquely suited for diabetic bone defects, conforming to complex shapes and fostering an environment conducive to tissue regeneration. As it degrades, Mg(OH)2 is released and dissolved by PLGA's acidic byproducts, releasing therapeutic Mg2+ ions. These ions are instrumental in macrophage phenotype modulation, inflammation reduction, and angiogenesis promotion, all vital for diabetic bone healing. Additionally, hydrogen (H2) released during degradation mitigates oxidative stress by diminishing reactive oxygen species (ROS). This multifaceted approach not only reduces ROS and inflammation but also enhances M2 macrophage polarization and cell migration, culminating in improved angiogenesis and bone repair. This scaffold presents an innovative strategy for addressing the complexities of diabetic bone defect treatment.