Effects of inorganic mmercury on osteoclasts and osteoblasts of the goldfish scales in vitro

Nobuo Suzuki, Koji Yachiguchi, Kazuichi Hayakawa, Katsunori Omori, Koji Takada, Makoto J. Tabata, Kei Ichiro Kitamura, Masato Endo, Shigehito Wada, Ajai K. Srivastav, Vishwajit S. Chowdhury, Yuji Oshima, Atsuhiko Hattori

Research output: Contribution to journalArticle

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Abstract

The fish scales are the major source of internal calcium requirement due to having a higher internal calcium reservoir than the body skeleton during the periods of drastic calcium demand, such as sexual maturation. Therefore, we developed original in vitro assay system using goldfish scales that contain osteoclasts and osteoblasts, and examined the direct effect of inorganic mercury (HgCl2) on osteoclasts and osteoblasts. In this assay system, we measured the activities of tartrate-resistant acid phosphatase (TRAP) and alkaline phosphatase (ALP) as respective indicators of each activity in osteoclasts and osteoblasts. TRAP activity in the scales significantly decreased by the treatment of HgCl2 (10-5 to 10-3M) during 6 hrs of incubation. In addition, mRNA expressions of osteoclastic markers: TRAP and cathepsin K significantly decreased compared with control. In our knowledge, this is the first report of a direct effect of inorganic mercury on osteoclasts. On the other hand, ALP activity decreased after exposures of HgCl2 at a concentration of 10-6, 10-5 or 10-4M for 36 and 64 hrs, although its activity did not change after 6 and 18 hrs. The mRNA expression of metallothionein (MT) which is a metal-binding-protein that protects the organism from heavy metal, significantly increased by HgCl2 (10-4M) although insulin-like growth factor-I (osteoblastic marker) was less than those of control scales by treatment with HgCl2 (10-4M). These results suggests that osteoblasts may synthesize MT and protect from mercury until 18 hrs incubation. Thus, the scale in vitro assay system would be a useful means for analysis of heavy metal on bone metabolism.

Original languageEnglish
Pages (from-to)47-51
Number of pages5
JournalJournal of the Faculty of Agriculture, Kyushu University
Volume56
Issue number1
Publication statusPublished - Feb 1 2011

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Mercuric Chloride
Goldfish
osteoclasts
osteoblasts
goldfish
Osteoclasts
Osteoblasts
acid phosphatase
mercury
Mercury
metallothionein
calcium
Metallothionein
alkaline phosphatase
Heavy Metals
Calcium
heavy metals
assays
cathepsin K
Alkaline Phosphatase

All Science Journal Classification (ASJC) codes

  • Biotechnology
  • Agronomy and Crop Science

Cite this

Suzuki, N., Yachiguchi, K., Hayakawa, K., Omori, K., Takada, K., Tabata, M. J., ... Hattori, A. (2011). Effects of inorganic mmercury on osteoclasts and osteoblasts of the goldfish scales in vitro. Journal of the Faculty of Agriculture, Kyushu University, 56(1), 47-51.

Effects of inorganic mmercury on osteoclasts and osteoblasts of the goldfish scales in vitro. / Suzuki, Nobuo; Yachiguchi, Koji; Hayakawa, Kazuichi; Omori, Katsunori; Takada, Koji; Tabata, Makoto J.; Kitamura, Kei Ichiro; Endo, Masato; Wada, Shigehito; Srivastav, Ajai K.; Chowdhury, Vishwajit S.; Oshima, Yuji; Hattori, Atsuhiko.

In: Journal of the Faculty of Agriculture, Kyushu University, Vol. 56, No. 1, 01.02.2011, p. 47-51.

Research output: Contribution to journalArticle

Suzuki, N, Yachiguchi, K, Hayakawa, K, Omori, K, Takada, K, Tabata, MJ, Kitamura, KI, Endo, M, Wada, S, Srivastav, AK, Chowdhury, VS, Oshima, Y & Hattori, A 2011, 'Effects of inorganic mmercury on osteoclasts and osteoblasts of the goldfish scales in vitro', Journal of the Faculty of Agriculture, Kyushu University, vol. 56, no. 1, pp. 47-51.
Suzuki N, Yachiguchi K, Hayakawa K, Omori K, Takada K, Tabata MJ et al. Effects of inorganic mmercury on osteoclasts and osteoblasts of the goldfish scales in vitro. Journal of the Faculty of Agriculture, Kyushu University. 2011 Feb 1;56(1):47-51.
Suzuki, Nobuo ; Yachiguchi, Koji ; Hayakawa, Kazuichi ; Omori, Katsunori ; Takada, Koji ; Tabata, Makoto J. ; Kitamura, Kei Ichiro ; Endo, Masato ; Wada, Shigehito ; Srivastav, Ajai K. ; Chowdhury, Vishwajit S. ; Oshima, Yuji ; Hattori, Atsuhiko. / Effects of inorganic mmercury on osteoclasts and osteoblasts of the goldfish scales in vitro. In: Journal of the Faculty of Agriculture, Kyushu University. 2011 ; Vol. 56, No. 1. pp. 47-51.
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