Extracellular matrix proteins involved in bone induction are vitamin D dependent

T. K. Sampath, S. Wientroub, A Hari Reddi

Research output: Contribution to journalArticle

19 Scopus citations

Abstract

Subcutaneous implantation of demineralized diaphyseal bone matrix into allogeneic rats results in local formation of cartilage and bone. However, implantation of demineralized bone matrix obtained from rachitic rats did not induce bone. Rachitic bone matix was therefore dissociatively extracted with 4 M guanidine HCl and then reconstituted with an inactive collagenous residue of control as carrier. Such reconstituted materials also lacked bone inductive potential. On the other hand, reconstitution of guanidine HCl extracts of control bone matrix with inactive vitamin D deficient matrix did result in bone induction. Partial purification (fractions containing proteins (< 50,000 daltons) of the guanidine HCl extract from rachitic rats on Sepharose CL-6B followed by reconstitution with inactive collagenous residues resulted in a weak (25% of control) inductive response. These observations imply that bone inductive proteins are vitamin D dependent and are reduced in matrix obtained from rachitic rats.

Original languageEnglish (US)
Pages (from-to)829-835
Number of pages7
JournalBiochemical and Biophysical Research Communications
Volume124
Issue number3
DOIs
StatePublished - Nov 14 1984
Externally publishedYes

ASJC Scopus subject areas

  • Biochemistry
  • Biophysics
  • Molecular Biology

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