Sodium fluoride induces hypercalcemia resulting from the upregulation of both osteoblastic and osteoclastic activities in goldfish, Carassius auratus

• Sato, Masayuki

• Hanmoto, Taizo

• Yachiguchi, Koji

• Tabuchi, Yoshiaki

• Kondo, Takashi

• Endo, Masato

• Kitani, Yoichiro

• Sekiguchi, Toshio

• Urata, Makoto

• Hai, Tran Ngoc

• Srivastav, Ajai Kumar

• Mishima, Hiroyuki

• Hattori, Atsuhiko

• Suzuki, Nobuo

抄録

The influence of sodium fluoride (NaF) on calcium metabolism was examined in goldfish (fresh water teleost). At 2days after administration of NaF (500ng/g body weight; 5μg/g body weight) (around 10−5 to 10−4M in goldfish), we indicated that plasma calcium levels upregulated in both doses of NaF-treated goldfish. To examine the mechanism of hypercalcemia by NaF treatments, therefore, direct effects of NaF on osteoblasts and osteoclasts in goldfish were investigated by an original assay system using teleost scale which has osteoblasts, osteoclasts and bone matrix. Alkaline phosphatase activity in the scales increased with the treatment of NaF (10−6 and 10−5M) during 6h of incubation. Also, tartrate-resistant acid phosphatase activity increased after exposure to NaF (10−5M) at the 6h of incubation. To investigate the osteoclastic activation, the mRNA expression of osteoclastogenesis related factors were examined. The receptor activator of the nuclear factor-κB ligand (RANKL) which is known as a factor for osteoclastogenesis, increased in the NaF-treated scales after 6h of incubation. The ratio of RANKL/osteoprotegerin (osteoclastogenesis inhibitory factor) significantly increased after 6h of incubation. Resulting from the increase of RANKL mRNA level, the expression of transcription-regulating factors was significantly increased. Furthermore, the expression of functional genes, cathepsin K and matrix metalloproteinase-9 mRNA, was significantly increased. In our knowledge, this is the first report concerning the effects of NaF on osteoblasts and osteoclasts in teleosts. We concluded that NaF influences calcium metabolism via osteoclastic activation in goldfish. © 2016 Elsevier Inc.

Embargo Period 12 months

収録刊行物

• Comparative Biochemistry and Physiology Part - C: Toxicology and Pharmacology

  Comparative Biochemistry and Physiology Part - C: Toxicology and Pharmacology 189 54-60, 2016-11-01

  Elsevier Inc.

キーワード

• Calcium metabolism
• Goldfish
• OPG
• Osteoblasts
• Osteoclasts
• RANKL
• Scales
• Sodium fluoride

詳細情報

• CRID: 1050282810963631360
• NII論文ID: 120005851367
• NII書誌ID: AA11504679
• ISSN: 15320456
• Web Site: http://hdl.handle.net/2297/46167
• 本文言語コード: en
• 資料種別: journal article
• データソース種別:
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