Bone remodeling markers and their role in oncology

Abstract

Bone metastases are a common complication of cancer. Patients with bone metastases may have experienced skeletal-related events, such as hypercalcemia, pathological fractures, pain syndrome of varying intensity, spinal cord compression with negative effects on the quality of life. Current diagnostic tools have some limitations, such as high cost and limited availability in the distant areas, as well as falls negative and falls positive results. In this aspect, non-invasive sensitive markers of bone metabolism might give additional valuable information. Bone remodeling markers (N-terminal propeptide of type 1 collagen, osteocalcin, C-terminal telopeptide of type 1 collagen, etc.) have been used for a long time to predict the effectiveness of osteoporosis treatment; as additional risk factors for treatment initiation in patients with osteoporosis, in diagnostic search for secondary forms of osteoporosis; and as predictors of fracture in population studies. This review summarizes the clinically relevant biochemical markers of bone remodeling and the available evidence for their use in the metastatic bone disease in particularly in the diagnosis and prognosis of bone metastases risk and skeletal complications, predicting clinical outcomes, bone disease progression and overall survival. It has been shown that a sufficient suppression of bone remodeling biochemical markers while on treatment with bisphosphonates is associated with an improvement in survival and a decrease in the risk of skeletal complications in patients with bone metastases. New data may become a rational basis for wider use of bone metabolism markers in oncological practice. However, it is necessary to standardize and validate the determination of bone markers and verification of cut-off diagnostic values for their introduction into the routine clinical practice of patients with malignancy.