Benito GE, Sánchez ML, del Pino-Montes J, Calvo JJ, Menéndez P, García-Marcos MA, Osdoby P, Orfao A. A new cytometric method for the immunophenotypic characterization of bone-derived human osteoclasts.
CYTOMETRY 2002;
50:261-6. [PMID:
12360576 DOI:
10.1002/cyto.10139]
[Citation(s) in RCA: 6] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Abstract
BACKGROUND
Osteoclast cell function relates to bone resorption. Isolation and characterization of these cells from in vivo sources remain difficult. The aim of this study was to show the feasibility of using flow cytometry to identify and characterize human mature osteoclasts obtained from bone tissues.
METHODS
Bone femoral heads obtained as discarded surgical material were used. To check the nature of 121F(+) (a monoclonal antibody specific for human osteoclasts) cells by flow cytometry, we used laser scanning cytometry to analyze simultaneously the immunophenotype and DNA cell content of osteoclast-like cell-enriched bone samples.
RESULTS
Results were compared with conventional morphologic and cytochemical studies. The percentage of cells that showed both cytochemical (tartrate-resistant acid phosphatase [TRAP](+)) and immunophenotypic (121F(+)) osteoclast-associated characteristics was very similar (12.5 +/- 6.2 versus 14.7 +/- 11.7; P = 0.46). Laser scanning cytometry showed that 121F(+) cells were bigger (P = 0.04) and they had a higher DNA cell content (P = 0.04) and more nuclei per cell (P = 0.04) than the 121F(-) cells present in the same sample.
DISCUSSION
This study relied on the combined use of the 121F(+) antibody and different cytometry-based techniques to characterize the osteoclast populations from human bone.
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