Related Experiment Video
Updated: Feb 7, 2026

Evaluating the Impact of Hydraulic Fracturing on Streams using Microbial Molecular Signatures
Published on: April 4, 2021
Molecular pathogenesis of fracture nonunion
Zi-Chuan Ding1, Yi-Kai Lin1, Yao-Kai Gan1
1Shanghai Key Laboratory of Orthopaedic Implants, Department of Orthopaedic Surgery, Shanghai Ninth People's Hospital, Shanghai Jiao Tong University School of Medicine, 200011, 639 Zhizaoju Road, Shanghai, China.
Abstract:
Fracture nonunion, a serious bone fracture complication, remains a challenge in clinical practice. Although the molecular pathogenesis of nonunion remains unclear, a better understanding may provide better approaches for its prevention, diagnosis and treatment at the molecular level. This review tries to summarise the progress made in studies of the pathogenesis of fracture nonunion. We discuss the evidence supporting the concept that the development of nonunion is related to genetic factors. The importance of several cytokines that regulate fracture healing in the pathogenesis of nonunion, such as tumour necrosis factor-α, interleukin-6, bone morphogenetic proteins, insulin-like growth factors, matrix metalloproteinases and vascular endothelial growth factor, has been proven in vitro, in animals and in humans. Nitric oxide and the Wnt signalling pathway also play important roles in the development of nonunion. We present potential strategies for the prevention, diagnosis and treatment of nonunion, and the interaction between genetic alteration and abnormal cytokine expression warrants further investigation.
The Translational Potential Of This Article:
A better understanding of nonunion molecular pathogenesis may provide better approaches for its prevention, diagnosis and treatment in clinical practice.
Insights
Understanding fracture nonunion molecular pathogenesis is key. This review summarizes genetic factors, cytokines, nitric oxide, and Wnt signaling, offering insights into prevention and treatment strategies for this complex bone healing complication.
Area of Science:
- Orthopedics
- Molecular Biology
- Biochemistry
Background:
- Fracture nonunion is a significant clinical challenge with unclear molecular pathogenesis.
- Understanding the molecular basis of nonunion is crucial for developing effective prevention, diagnosis, and treatment strategies.
Purpose of the Study:
- To review and summarize current knowledge on the molecular pathogenesis of fracture nonunion.
- To highlight the roles of genetic factors, cytokines, and signaling pathways in nonunion development.
Main Methods:
- Literature review of studies on fracture nonunion pathogenesis.
- Analysis of evidence from in vitro, animal, and human studies.
- Synthesis of findings on genetic factors, cytokines, and signaling pathways.
Main Results:
- Fracture nonunion development is linked to genetic factors.
- Key cytokines (TNF-α, IL-6, BMPs, IGFs, MMPs, VEGF) and pathways (nitric oxide, Wnt) are implicated.
- Evidence supports the role of these molecular factors in nonunion across different study models.
Conclusions:
- Molecular pathogenesis of fracture nonunion involves genetic predisposition and dysregulated cytokine signaling.
- Further investigation into the interplay between genetic alterations and cytokine expression is warranted.
- This understanding can guide the development of novel therapeutic strategies for fracture nonunion.
Related Concept Videos
Pulmonary Hypertension: Classification and Pathogenesis
There are various classifications for PH, each relating to different underlying causes and also...
Asthma: Pathogenesis and Management
Asthma is classified as allergic and non-allergic. Allergens such as dust mites, pollen, and pet dander trigger allergic asthma, while factors like cold air, intense emotions, or exercise can induce non-allergic asthma.
Cystic Fibrosis: Pathogenesis
CF is primarily caused by a genetic mutation in a chromosome 7 gene coding for the cystic fibrosis transmembrane conductance regulator (CFTR) protein. The most common gene mutation leading to CF is the ΔF508 mutation,...
Fractures: Bone Repair
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...
COPD: Pathogenesis and Clinical Features
The primary cause for the onset of COPD is cigarette smoking and exposure to air pollution. These hazardous factors initiate a chain reaction within the lungs, resulting in chronic inflammation, damage to the airways, and a...
Molecular Models

