Level of serum undercarboxylated osteocalcin correlates with bone quality assessed by calcaneal quantitative ultrasound sonometry in young Japanese females

  • Authors:
    • Yoshio Suzuki
    • Asako Maruyama‑Nagao
    • Keishoku Sakuraba
    • Sachio Kawai
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  • Published online on: March 9, 2017     https://doi.org/10.3892/etm.2017.4206
  • Pages: 1937-1943
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Abstract

The diagnostic criteria of osteoporosis were established based on bone mineral density (BMD). Therefore, BMD measured by dual energy X‑ray absorptiometry has been recognized as the gold standard to diagnose osteoporosis. However, discrepancies between fracture risk and BMD have been recognized. Bone is composed of collagen scaffold reinforced by hydroxyapatite. Both protein scaffold and hydroxyapatite are involved in bone quality. BMD may indicate bone mineralization but potentially fail to assess the protein scaffold. Vitamin K contributes to bone mineralization and as a protein scaffold. A deficiency of vitamin K upregulates the level of serum undercarboxylated osteocalcin (ucOC), and serum ucOC correlates with fracture risk. However, direct association of ucOC and bone quality has not been demonstrated. For the present study, a total of 49 healthy young Japanese female college students underwent calcaneal; quantitative ultrasound sonometry (QUS) and determination of serological bone metabolic markers. QUS parameters were significantly correlated with serum 25‑hydroxyvitamin D (25‑OH‑D) concentrations (P<0.05). A significant negative correlation was also identified between log transformed serum ucOC concentrations [Ln(ucOC)] and a QUS parameter, speed of sound (SOS) (P<0.05). Stepwise multiple regression analysis indicated that Ln(ucOC) was an independent determinant of SOS, and 25-OH-D was an independent determinant of the other two QUS parameters, transmission index (TI) and synthetic parameter osteo‑sono‑assessment index. As vitamin D is involved in bone mineralization, TI may reflect the mineralization. Correlation of vitamin K status, indicated by ucOC, with SOS may clarify the correlation between vitamin K status and bone quality, although the material factors that connect them have not been identified.
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May-2017
Volume 13 Issue 5

Print ISSN: 1792-0981
Online ISSN:1792-1015

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Spandidos Publications style
Suzuki Y, Maruyama‑Nagao A, Sakuraba K and Kawai S: Level of serum undercarboxylated osteocalcin correlates with bone quality assessed by calcaneal quantitative ultrasound sonometry in young Japanese females. Exp Ther Med 13: 1937-1943, 2017
APA
Suzuki, Y., Maruyama‑Nagao, A., Sakuraba, K., & Kawai, S. (2017). Level of serum undercarboxylated osteocalcin correlates with bone quality assessed by calcaneal quantitative ultrasound sonometry in young Japanese females. Experimental and Therapeutic Medicine, 13, 1937-1943. https://doi.org/10.3892/etm.2017.4206
MLA
Suzuki, Y., Maruyama‑Nagao, A., Sakuraba, K., Kawai, S."Level of serum undercarboxylated osteocalcin correlates with bone quality assessed by calcaneal quantitative ultrasound sonometry in young Japanese females". Experimental and Therapeutic Medicine 13.5 (2017): 1937-1943.
Chicago
Suzuki, Y., Maruyama‑Nagao, A., Sakuraba, K., Kawai, S."Level of serum undercarboxylated osteocalcin correlates with bone quality assessed by calcaneal quantitative ultrasound sonometry in young Japanese females". Experimental and Therapeutic Medicine 13, no. 5 (2017): 1937-1943. https://doi.org/10.3892/etm.2017.4206