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  • Title: Decreased serum bone specific alkaline phosphatase and increased urinary N-terminal telopeptide of type I collagen as prognostic markers for bone mineral density loss in HIV patients on cART.
    Author: Koga I, Seo K, Yoshino Y, Kitazawa T, Kurahashi I, Ota Y.
    Journal: J Infect Chemother; 2016 Aug; 22(8):543-7. PubMed ID: 27346381.
    Abstract:
    OBJECTIVES: Bone mineral density (BMD) loss is a major chronic complication in HIV patients. We performed a prospective study to determine the time course of BMD changes and to find prognostic factors of BMD loss in HIV patients on combination antiretroviral therapy (cART). PATIENTS AND METHODS: Subjects were 54 male Japanese HIV patients who had been on cART ≥1 year with no therapeutic agents for osteoporosis. Patients were observed for ≥1 year (median 3.1 years) and underwent annual BMD analyses using dual energy X-ray absorptiometry. Changes in BMD at lumbar spine and femoral neck were calculated for each person-year of all the patients. Clinical factors were also collected simultaneously with BMD examinations to determine prognostic factors for BMD loss. RESULTS: In total, 173 person-years in 54 patients were observed. One third (19, 35.2%) and slightly over half (30, 55.6%) patients showed BMD decreases at lumbar spine and femoral neck, respectively. However, the median BMD changes at lumbar spine and femoral neck were 0.0% and -0.52% per year, respectively. Monovariant and mixed model analyses determined that decreased serum bone specific alkaline phosphatase (BAP, p = 0.0047) and increased urinary N-terminal telopeptide (uNTx, p = 0.0011) were prognostic factors for BMD loss at lumbar spine and femoral neck, respectively. CONCLUSIONS: BMD at both lumbar spine and femoral neck changed little on average in HIV patients on cART. Decreased serum BAP or increased uNTx may be helpful to predict progressive BMD loss in the following year and to select patients for BMD follow-up or initiation of anti-osteoporosis treatment.
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