Open Access

Effect of vitamin K2 on the development of stress‑induced osteopenia in a growing senescence‑accelerated mouse prone 6 strain

  • Authors:
    • Hironobu Katsuyama
    • Shigeko Fushimi
    • Kunikazu Yamane
    • Yoko Watanabe
    • Koichiro Shimoya
    • Toshiko Okuyama
    • Midori Katsuyama
    • Kiyofumi Saijoh
    • Masafumi Tomita
  • View Affiliations

  • Published online on: July 7, 2015     https://doi.org/10.3892/etm.2015.2621
  • Pages: 843-850
  • Copyright: © Katsuyama et al. This is an open access article distributed under the terms of Creative Commons Attribution License.

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Abstract

Vitamin K2 (VK2) has been used as a therapeutic agent for osteoporosis, since it has been suggested to be able to reduce the frequency of fractures by improving bone quality; however, bone turnover is strictly regulated by various cytokines and hormones. In the present study, the effect of menaquinone‑4 (MK‑4) on bone turnover was investigated using the senescence‑accelerated mouse prone 6 (SAMP6) strain. Since water‑immersion restraint stress (WRS) causes a significant decrease in bone mineral density (BMD), WRS was used as the bone resorption model in the SAMP6 strain. Six‑week‑old SAMP6 male mice were divided into the following three groups: Control, WRS and WRS + MK‑4. WRS was performed for 6 h per day, 5 times a week, for 4 weeks. Following WRS, MK‑4 (30 mg/kg) was injected subcutaneously 3 times a week for 4 weeks. No growth retardation was observed in the WRS groups as compared with the control group. In the WRS groups, the BMD was significantly lower than that in the control group. The levels of bone formation and resorption markers were increased in the WRS groups, indicating that WRS reduced the BMD by promoting high bone turnover. A bone histomorphometrical examination showed that the trabecular (Tb) bone mass in the secondary spongiosa at the distal femur was significantly reduced in the WRS mice, and this reduction was abrogated by MK‑4 treatment. Specifically, the Tb bone reduction was caused by the activation of osteoclasts (Ocs), and Oc activity was suppressed by MK‑4. The number of osteoblasts and the mineral apposition rate were significantly increased in the WRS and WRS + MK‑4 mice, suggesting that WRS triggered a significantly higher mineral apposition rate. These results indicate that MK‑4 can induce recovery from the bone mineral loss caused by WRS treatment. Further studies are required to clarify the association between bone quality and MK‑4.
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September-2015
Volume 10 Issue 3

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

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Spandidos Publications style
Katsuyama H, Fushimi S, Yamane K, Watanabe Y, Shimoya K, Okuyama T, Katsuyama M, Saijoh K and Tomita M: Effect of vitamin K2 on the development of stress‑induced osteopenia in a growing senescence‑accelerated mouse prone 6 strain. Exp Ther Med 10: 843-850, 2015.
APA
Katsuyama, H., Fushimi, S., Yamane, K., Watanabe, Y., Shimoya, K., Okuyama, T. ... Tomita, M. (2015). Effect of vitamin K2 on the development of stress‑induced osteopenia in a growing senescence‑accelerated mouse prone 6 strain. Experimental and Therapeutic Medicine, 10, 843-850. https://doi.org/10.3892/etm.2015.2621
MLA
Katsuyama, H., Fushimi, S., Yamane, K., Watanabe, Y., Shimoya, K., Okuyama, T., Katsuyama, M., Saijoh, K., Tomita, M."Effect of vitamin K2 on the development of stress‑induced osteopenia in a growing senescence‑accelerated mouse prone 6 strain". Experimental and Therapeutic Medicine 10.3 (2015): 843-850.
Chicago
Katsuyama, H., Fushimi, S., Yamane, K., Watanabe, Y., Shimoya, K., Okuyama, T., Katsuyama, M., Saijoh, K., Tomita, M."Effect of vitamin K2 on the development of stress‑induced osteopenia in a growing senescence‑accelerated mouse prone 6 strain". Experimental and Therapeutic Medicine 10, no. 3 (2015): 843-850. https://doi.org/10.3892/etm.2015.2621