Urine N-telopeptide excretion in dogs with appendicular osteosarcoma

Area of Science:

• Veterinary Oncology
• Biochemistry
• Bone Metabolism

Background:

• Canine appendicular osteosarcoma (OSA) is a common bone cancer.
• OSA can cause pathological bone remodeling.
• Markers of bone metabolism can aid in managing bone malignancies.

Purpose of the Study:

• To evaluate urinary N-terminal telopeptide (NTx) as a marker of bone resorption in dogs with appendicular OSA.
• To assess changes in urinary NTx excretion following treatment for OSA.

Main Methods:

• Compared urinary NTx excretion in 63 dogs with appendicular OSA to 29 healthy controls.
• Correlated baseline urinary NTx with serum bone alkaline phosphatase (bALP) and tumor length.
• Monitored urinary NTx in 17 dogs with OSA undergoing amputation or palliative therapy.

Main Results:

• Dogs with OSA exhibited significantly higher baseline urinary NTx excretion than controls (P < .0001).
• Urinary NTx excretion decreased significantly after treatment in dogs with OSA.
• No significant correlation was found between baseline urinary NTx and bALP or tumor length.

Conclusions:

• Elevated urinary NTx may support the diagnosis of focal skeletal osteolysis in dogs with OSA.
• Reduced urinary NTx after treatment suggests a decrease in pathological bone resorption.
• Urinary NTx shows potential as a diagnostic and therapeutic monitoring tool for canine osteosarcoma.