Do bone turnover markers reflect changes in bone microarchitecture during treatment of patients with thyroid...

Area of Science:

• Endocrinology
• Bone Metabolism
• Medical Imaging

Background:

• Thyroid dysfunction significantly impacts bone metabolism.
• Bone microarchitecture changes are crucial in assessing fracture risk.
• Bone turnover markers (BTMs) offer insights into bone remodeling processes.

Purpose of the Study:

• To compare changes in BTMs (CTX-I and PINP) with bone microarchitecture alterations during thyroid dysfunction treatment.
• To assess the utility of HR-pQCT in evaluating bone changes alongside BTMs.
• To differentiate the roles of CTX-I and PINP in monitoring bone health in thyroid disease.

Main Methods:

• Prospective study involving women with newly diagnosed hypo- or hyperthyroidism.
• High-resolution peripheral quantitative computed tomography (HR-pQCT) assessed bone microarchitecture in the tibia and radius.
• Bone turnover markers (BTMs), including CTX-I and PINP, were measured at diagnosis and after achieving euthyroidism.

Main Results:

• In hyperthyroid patients, BTM changes correlated with cortical variables and bone mineral density (BMD) from HR-pQCT.
• Correlations were also observed between BTMs and estimated bone strength in hyperthyroid individuals.
• In hypothyroidism, significant correlations were less evident; however, tibial BMD changes varied based on CTX-I and PINP trends post-treatment.

Conclusions:

• Changes in CTX-I and PINP reflect bone microarchitecture restoration in thyroid dysfunction.
• CTX-I appears more sensitive for initial detection in treatment-naïve thyroid diseases.
• PINP demonstrates greater utility in monitoring bone health during the treatment of thyroid dysfunction.