Linked Life Data

10520966

Source:http://linkedlifedata.com/resource/pubmed/id/10520966

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
10
pubmed:dateCreated
1999-10-28
pubmed:abstractText
Bone resorption is regulated by the cytokines within marrow cells that mediate osteoclast formation and activation. IL-1 and TNF induce bone resorption by stimulating the production of osteoclast-like multinucleated cells and by increasing the bone-resorbing activity of formed osteoclasts. This study was designed to detect IL-1 and TNF in osteoclasts in vitro and to determine whether these cytokines up-regulate osteoclast differentiation and bone resorption. The production of IL-1 alpha, -beta, and TNF alpha, beta in osteoclasts was examined immunohistochemically and by in situ hybridization. In the co-culture of C57BL/6N mouse bone marrow and MC3T3-G2/PA6 cells, a colony of osteoclasts formed, and IL-1 alpha and TNF alpha were detected. However, IL-1 beta and TNF beta were not detected. To investigate the role of IL-1 alpha and TNF alpha from osteoclasts, we enumerated TRAP-positive cells and measured the resorption pit areas in the presence of antibodies against IL-1 alpha and TNF alpha. The addition of antibodies against IL-1 alpha and TNF alpha to the co-culture system decreased the number of TRAP-positive colonies at seven days after incubation (anti-IL-1 alpha, 25.0 +/- 2.3%; anti-TNF alpha, 41.7 +/- 3.7%; anti-IL-1 alpha + anti-TNF alpha, 40.5 +/- 1.3%; and control, 100%), and the ratio of mononuclear to multinuclear cells had changed (anti-IL-1 alpha, 90:10; anti-TNF alpha, 75:25; anti-IL-1 alpha+ anti-TNF alpha, 88:12; and control, 60:40). The total pit areas per dentin slice also decreased with the addition of antibodies (anti-IL-1 alpha, 28,828; anti-TNF alpha, 49,249; anti-IL-1 alpha + anti-TNF alpha, 30,685; and control, 303,139 mm2). These results suggest that local production of IL-1 alpha and TNF alpha by osteoclasts is an important mechanism for regulating the osteoclast differentiation and bone resorptive process.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
D
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0022-0345
pubmed:author
pubmed:issnType
Print
pubmed:volume
78
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
1617-23
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed-meshheading:10520966-Acid Phosphatase, pubmed-meshheading:10520966-Animals, pubmed-meshheading:10520966-Biological Markers, pubmed-meshheading:10520966-Bone Marrow Cells, pubmed-meshheading:10520966-Bone Resorption, pubmed-meshheading:10520966-Cell Differentiation, pubmed-meshheading:10520966-Cell Line, pubmed-meshheading:10520966-Cells, Cultured, pubmed-meshheading:10520966-Coculture Techniques, pubmed-meshheading:10520966-Female, pubmed-meshheading:10520966-Immunohistochemistry, pubmed-meshheading:10520966-In Situ Hybridization, pubmed-meshheading:10520966-Interleukin-1, pubmed-meshheading:10520966-Isoenzymes, pubmed-meshheading:10520966-Mice, pubmed-meshheading:10520966-Mice, Inbred C57BL, pubmed-meshheading:10520966-Osteoclasts, pubmed-meshheading:10520966-Tumor Necrosis Factor-alpha, pubmed-meshheading:10520966-Up-Regulation
pubmed:year
1999
pubmed:articleTitle
Autocrine regulation of osteoclast formation and bone resorption by IL-1 alpha and TNF alpha.
pubmed:affiliation
Department of Operative Dentistry and Endodontics, Kanagawa Dental College, Yokosuka, Japan.
pubmed:publicationType
Journal Article, Research Support, Non-U.S. Gov't