Zeolite a inhibits osteoclast‐mediated bone resorption in vitro

N. Schütze, M. J. Oursler, J. Nolan, B. L. Riggs, T. C. Spelsberg

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31 Scopus citations


The effects of Zeolite A on Bone resorbing activity of highly purified avian osteoclasts were analyzed. The present study demonstrates that when 100 pg/ml of acid‐treated Zeolite A is added to the media the number of pits per osteoclast is reduced 3‐fold at 24h after treatment. Secreted cathepsin B enzyme activity was also reduced 3‐fold. A similar reduction in pit number per osteoclast was measured following 48 h of treatment with Zeolite A but there appeared to be less reduction of cathepsin B enzyme activity. The effects on pit number and cathepsin B Protein activity were Zeolit dose dependent. The structure of the compound seemed to be responsible for the effects measured since compounds used to represent constituents of Zeolite A (silicon dioxide and aluminum cholride) failed to inhibit bone resorption or reduce the level of secreted cathepsin B enzyme activity. Thus the molicular architecture of Zeolite A or a derivative there of appears to be inportant. In conclusion, the data indicate that Zeolite A can inhibit bone resorption. Together with previous data on osteoblasts, this might suggest a potential positive activity of intact Zeolite A or a partial substructure of Zeolite A on bone turnover. © Wiley‐Liss, Inc.

Original languageEnglish (US)
Pages (from-to)39-46
Number of pages8
JournalJournal of cellular biochemistry
Issue number1
StatePublished - May 1995


  • Cathepsins
  • Qsteoclasts
  • Silicon deoxide
  • Zeolite A
  • aluminum chloride
  • osteoporosis
  • resorption

ASJC Scopus subject areas

  • Biochemistry
  • Molecular Biology
  • Cell Biology


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