Poor Bone Quality in Patients With Amyotrophic Lateral Sclerosis

Area of Science:

• Orthopedics
• Neurology
• Endocrinology

Background:

• Amyotrophic lateral sclerosis (ALS) is linked to increased bone fractures due to musculoskeletal deterioration.
• Understanding bone quality in ALS patients is crucial for managing associated health risks.
• Investigating the influence of sex and ALS type on bone health is important.

Purpose of the Study:

• To compare bone quality between ALS patients and healthy controls.
• To evaluate the impact of sex and ALS type on bone health in ALS.
• To analyze the relationship between clinical status, metabolic parameters, and bone health in ALS patients.

Main Methods:

• Quantitative ultrasound (QUS) of the calcaneus was used to assess bone mass quality in 33 ALS patients and 66 healthy controls.
• Measurements included ultrasonic broadband attenuation (BUA), speed of sound (SOS), stiffness index, and T-score.
• Clinical data (ALSFRS-R, Barthel index, FVC, MRC scale) and metabolic parameters (Vitamin D, TSH, calcium, ALP) were analyzed.

Main Results:

• ALS patients exhibited significantly lower bone parameters (BUA, SOS, stiffness, T-score) than healthy controls.
• ALS females showed poorer bone parameters compared to healthy females; 75.8% of ALS patients had an osteoporotic profile.
• Vitamin D and TSH levels positively correlated with bone parameters, while clinical status showed no correlation.

Conclusions:

• ALS patients, particularly females, demonstrate significantly deteriorated bone health compared to healthy individuals.
• Structural bone changes in ALS are independent of ALS subtype and clinical status.
• Bone health in ALS appears to be associated with metabolic factors, specifically Vitamin D and TSH levels.