Related Experiment Video
Updated: Jun 27, 2026
11:20
Site-Directed Immobilization of Bone Morphogenetic Protein 2 to Solid Surfaces by Click Chemistry
Published on: March 29, 2018
A Biomimetic Amelogenin-Fibronectin Fusion Protein with Dual Cell-Adhesive and Osteoinductive Functions for Alveolar
Mengsong Zheng1,2,3,4, Xinyi Jiang1,2,3,4, Minghua Lei1,2,3,4
1Department of Cell Biology, College of Life Science and Technology, Jinan University, Guangzhou 510632, China.
Bioengineering (Basel, Switzerland)
|June 26, 2026
Summary
A new recombinant protein, rtAmR, combining amelogenin and fibronectin
Area of Science:
- Biomaterials Science
- Regenerative Medicine
- Oral Biology
Background:
- Periodontitis causes significant tissue destruction and tooth loss, posing clinical challenges.
- Current periodontal regenerative therapies struggle to effectively promote both cell adhesion and osteogenic differentiation.
- Amelogenin (Am) aids mineralization but has limited cell adhesion, while fibronectin's (FN) RGD domain enhances cell adhesion.
Purpose of the Study:
- To develop and evaluate a novel recombinant fusion protein (rtAmR) combining amelogenin's conserved regions with fibronectin's RGD domain.
- To assess rtAmR's efficacy in promoting human stem cells from the apical papilla (hSCAPs) adhesion and osteogenic differentiation in vitro.
- To investigate rtAmR's potential for promoting alveolar bone regeneration in vivo.
Main Methods:
- Constructed a recombinant fusion protein (rtAmR) by integrating conserved amelogenin regions with the RGD domain of fibronectin.
- Evaluated hSCAP adhesion and spreading on rtAmR in vitro, quantifying cell numbers and spreading area.
- Assessed osteogenic differentiation of hSCAPs using alkaline phosphatase (ALP) activity, collagen type I (COL I) expression, and calcium nodule formation assays.
- Utilized a rat alveolar bone defect model to evaluate rtAmR's bone regeneration capacity, measuring bone volume/total volume (BV/TV).
- Conducted immunohistochemistry to assess rtAmR's biosafety by analyzing inflammatory cell infiltration (neutrophils, mast cells, M2 macrophages).
Main Results:
- rtAmR significantly enhanced hSCAP adhesion and spreading compared to rhAm (1.9-fold and 2.1-fold higher, respectively).
- rtAmR demonstrated comparable or superior osteogenic differentiation activity to rhAm, evidenced by increased ALP activity, COL I expression, and calcium nodule formation.
- In vivo, rtAmR treatment significantly promoted alveolar bone regeneration in rats, outperforming rhAm and rhFN.
- Immunohistochemistry confirmed rtAmR's biosafety, showing no significant increase in inflammatory cells and suggesting M2-independent osteogenesis.
Conclusions:
- The novel rtAmR protein effectively promotes both cell adhesion and osteogenic differentiation.
- rtAmR demonstrates significant potential for enhancing periodontal bone regeneration with good biosafety.
- rtAmR represents a promising bifunctional bioactive protein for addressing challenges in periodontal tissue repair.
More Related Videos
07:14Fabrication of a Biomimetic Nano-Matrix with Janus Base Nanotubes and Fibronectin for Stem Cell Adhesion
Published on: May 10, 2020
09:35Distinctive Capillary Action by Micro-channels in Bone-like Templates can Enhance Recruitment of Cells for Restoration of Large Bony Defect
Published on: September 11, 2015
Related Concept Videos
01:31Bone Remodeling and Repair
Osteoclasts are cells responsible for bone resorption and remodeling. They originate from hematopoietic progenitor cells present in the bone marrow. Numerous progenitor cells fuse to form multinucleated cells, each with 10-20 nuclei. A single osteoclast has a diameter of 150 to 200 µM. These cells have ruffled borders that break down the underlying bone tissue and release minerals such as calcium into the blood in bone resorption. Osteoclasts cling to bones with their ruffled edges during bone...
01:27Fractures: Bone Repair
Treatment for a fracture is based on the type of break, the bone affected, and the patient's age.
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...
Minor fractures with no bone displacement are treated by immobilizing the fractured bone using a cast or splint. However, in the case of fractures with displaced bones, the broken bones are repositioned before immobilization to ensure successful healing without deformation and loss of function. The realignment of fractured bone ends is performed through a process called reduction. If the procedure...