TY - JOUR AB - Hepatitis B virus (HBV) infection is associated with the risk of osteoporosis and bone mineral density (BMD) loss. Tenofovir alafenamide (TAF) is associated with a slightly lower degree of BMD loss compared with tenofovir disoproxil, without loss of the excellent anti‑HBV effects. The aim of the present study was to verify the effect of bone metabolism in patients with HBV treated with TAF. A total of 87 patients were treated with TAF. Of these, 32 patients were treatment naïve, and 55 patients were treated with entecavir (ETV) for at least 1 year, after which ETV was switched to TAF. At the start of TAF and after 1 year, BMD in the lumbar and neck of the femur, tartrate‑resistant acid phosphatase isoform 5b (TRACP‑5b) levels as a marker of bone metabolism and serum inorganic phosphorus (P) were compared to estimate bone metabolism. Serum creatinine (Cr), cystatin C, urine protein and β2 microglobulin levels were evaluated to estimate kidney function. Treatment with TAF for 1 year decreased TRACP‑5b levels, particularly in patients with bone disease, except for a minimal significant change (MSC; decrease of 12.4%) in TRACP‑5b levels. The change in rate of TRACP‑5b levels were positively associated with changes in P, Cr‑estimated glomerular filtration rate and TRACP‑5b levels at the start of TAF. Logistic regression analysis showed that increased BMD in the lumbar region contributed to the switch from ETV to TAF. TAF induced a decrease in TRACP‑5b levels in patients with HBV. Bone disease was a contributing factor for MSC. Since TRACP‑5b can be used as a marker of bone metabolism and fractures, TAF may exhibit potential in preventing fractures in patients with HBV. AD - Department of Gastroenterology, Nagasaki Harbor Medical Center, Nagasaki 850‑8555, Japan Department of Gastroenterology and Hepatology, Graduate School of Biomedical Sciences, Nagasaki University, Nagasaki 852‑8501, Japan Innovation and Translational Research Center, Nagasaki Harbor Medical Center, Nagasaki 850‑8555, Japan AU - Okamura,Takuma AU - Ichikawa,Tatsuki AU - Miyaaki,Hisamitsu AU - Miuma,Satoshi AU - Motoyoshi,Yasuhide AU - Yamashima,Mio AU - Yamamichi,Shinobu AU - Koike,Makiko AU - Nakano,Yusuke AU - Honda,Tetsurou AU - Yajima,Hiroyuki AU - Miyazaki,Osamu AU - Kuribayashi,Yasutaka AU - Ikeda,Tomonari AU - Taura,Naota AU - Nakao,Kazuhiko DA - 2022/01/01 DO - 10.3892/br.2021.1489 IS - 1 JO - Biomed Rep KW - bone mineral density hepatitis B virus tenofovir alafenamide tartrate‑resistant acid phosphatase isoform 5b PY - 2022 SN - 2049-9434 2049-9442 SP - 6 ST - Change in tartrate‑resistant acid phosphatase isoform 5b levels, a marker of bone metabolism, in patients with chronic hepatitis B treated with tenofovir alafenamide T2 - Biomedical Reports TI - Change in tartrate‑resistant acid phosphatase isoform 5b levels, a marker of bone metabolism, in patients with chronic hepatitis B treated with tenofovir alafenamide UR - https://doi.org/10.3892/br.2021.1489 VL - 16 ER -