Linked Life Data

9028530

Source:http://linkedlifedata.com/resource/pubmed/id/9028530

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
2
pubmed:dateCreated
1997-5-9
pubmed:abstractText
We have recently cloned cathepsin K from a human bone cDNA library. Since cathepsins are proposed to be involved in the degradation of mineralized bone matrix, we have investigated, by in situ hybridization and immunocytochemistry, the expression of the cathepsin K mRNA transcripts and protein in sections of bone and giant cell tumor to determine which cells express this enzyme. Within all tissues studied, cathepsin K was highly expressed in osteoclasts. Furthermore, the expression of cathepsin K mRNA in giant cell tumor tissue appeared to be confined to the periphery of the osteoclast indicating a compartmentalization of the mRNA. Immunohistochemistry confirmed the specific localization of cathepsin K to the osteoclast. In actively resorbing osteoclasts, the immunostaining was localized at the ruffled border, whereas in osteoclasts in sections of giant cell tumor, staining was observed in lysosomal vacuoles, which in some cases were seen to fuse with the cell membrane. Other cells within the bone, such as osteoblasts and osteocytes, did not express either the cathepsin K transcript or protein. However, there were very low levels of cathepsin K detected in a population of mononuclear cells, possibly representing osteoclast progenitor cells, within the marrow/stromal layer. The specific localization of cathepsin K within osteoclasts would therefore indicate the potential role of this enzyme in the bone resorptive process.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Feb
pubmed:issn
8756-3282
pubmed:author
pubmed:issnType
Print
pubmed:volume
20
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
81-6
pubmed:dateRevised
2009-11-19
pubmed:meshHeading
pubmed:year
1997
pubmed:articleTitle
Localization of cathepsin K in human osteoclasts by in situ hybridization and immunohistochemistry.
pubmed:affiliation
Pharma Research, Ciba-Geigy Ltd., Basel, Switzerland. littlam1@fmi.ch
pubmed:publicationType
Journal Article