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Chronic Intermittent Ethanol Vapor Exposure Paired with Two-Bottle Choice to Model Alcohol Use Disorder
Published on: June 23, 2023
Impaired osteoinduction in a rat model for chronic alcohol abuse
C H Trevisiol1, R T Turner, J E Pfaff
1Department of Chemical Engineering, Oregon State University, Corvallis, OR 97331, USA.
Bone
|June 15, 2007
Summary
Chronic alcohol abuse impairs bone fracture healing by reducing new bone formation. This study found alcohol significantly decreased bone volume and structural integrity in implants, suggesting reduced osteoinduction contributes to poor healing in alcoholics.
Area of Science:
- Orthopedics
- Bone Biology
- Toxicology
Background:
- Alcohol abuse is a known risk factor for bone fractures.
- Individuals with alcohol use disorder exhibit higher rates of impaired fracture healing.
- The precise mechanisms of alcohol's detrimental effects on bone healing remain unclear.
Purpose of the Study:
- To investigate the impact of chronic alcohol consumption on osteoinduction, the process of new bone formation.
- To determine if alcohol affects the early stages of bone healing.
Main Methods:
- Utilized a rat model of chronic alcohol abuse, where ethanol comprised 35% of caloric intake.
- Implanted demineralized allogeneic bone matrix (DABM) cylinders to assess osteoinduction.
- Analyzed implants after 6 weeks using histology, micro-computed tomography (microCT), and chemical analysis.
- Controlled for food intake between alcohol-fed and control groups.
Main Results:
- Control rats demonstrated robust bone formation and mature ossicle development within DABM implants.
- Alcohol consumption led to significant reductions in bone volume, bone volume/original cylinder weight, connectivity density, and trabecular bone parameters.
- No alterations were observed in the volumetric density or the mineral composition (calcium, magnesium, zinc, etc.) of the bone within the implants.
- Ash weight and percentage of ash weight were also significantly reduced in alcohol-fed rats.
Conclusions:
- Chronic alcohol abuse significantly reduces new bone formation (osteoinduction) in a bone healing model.
- The observed decrease in bone formation, rather than impaired mineralization, is a key defect induced by alcohol.
- Reduced osteoinduction is a likely contributor to the impaired fracture healing observed in individuals with alcohol use disorder.
