Abstract
Bone marrow stromal cells (MSCs) and osteoblasts are the two main non-haematopoietic cellular components of human bone tissue. To identify novel osteoblast-related molecules, we performed a gene expression profiling analysis comparing MSCs and osteoblasts isolated from the same donors. Genes differentially overexpressed in osteoblasts were mainly related to the negative control of cell proliferation, pro-apoptotic processes, protein metabolism and bone remodelling. Notably, we also identified the collagen XV (COL15A1) gene as the most up-regulated gene in osteoblasts compared with MSCs, previously described as being expressed in the basement membrane in other cell types. The expression of collagen type XV was confirmed at the protein level on isolated osteoblasts and we demonstrated that it significantly increases during the osteogenic differentiation of MSCs in vitro and that free ionised extracellular calcium significantly downmodulates its expression. Moreover, light and electron microscopy showed that collagen type XV is expressed in bone tissue biopsies mainly by working osteoblasts forming new bone tissue or lining bone trabeculae. To our knowledge, these data represent the first evidence of the expression of collagen type XV in human osteoblasts, a calcium-regulated protein which correlates to a specific functional state of these cells.
| Original language | English |
|---|---|
| Pages (from-to) | 401-409 |
| Number of pages | 9 |
| Journal | Journal of Cellular Physiology |
| Volume | 220 |
| Issue number | 2 |
| DOIs | |
| Publication status | Published - Aug 2009 |
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ASJC Scopus subject areas
- Clinical Biochemistry
- Cell Biology
- Physiology
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Gene array profile identifies collagen type XV as a novel human osteoblast-secreted matrix protein. / Lisignoli, Gina; Codeluppi, Katia; Todoerti, Katia; Manferdini, Cristina; Piacentini, Anna; Zini, Nicoletta; Grassi, Francesco; Cattini, Luca; Piva, Roberta; Rizzoli, Vittorio; Facchini, Andrea; Giuliani, Nicola; Neri, Antonino.
In: Journal of Cellular Physiology, Vol. 220, No. 2, 08.2009, p. 401-409.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Gene array profile identifies collagen type XV as a novel human osteoblast-secreted matrix protein
AU - Lisignoli, Gina
AU - Codeluppi, Katia
AU - Todoerti, Katia
AU - Manferdini, Cristina
AU - Piacentini, Anna
AU - Zini, Nicoletta
AU - Grassi, Francesco
AU - Cattini, Luca
AU - Piva, Roberta
AU - Rizzoli, Vittorio
AU - Facchini, Andrea
AU - Giuliani, Nicola
AU - Neri, Antonino
PY - 2009/8
Y1 - 2009/8
N2 - Bone marrow stromal cells (MSCs) and osteoblasts are the two main non-haematopoietic cellular components of human bone tissue. To identify novel osteoblast-related molecules, we performed a gene expression profiling analysis comparing MSCs and osteoblasts isolated from the same donors. Genes differentially overexpressed in osteoblasts were mainly related to the negative control of cell proliferation, pro-apoptotic processes, protein metabolism and bone remodelling. Notably, we also identified the collagen XV (COL15A1) gene as the most up-regulated gene in osteoblasts compared with MSCs, previously described as being expressed in the basement membrane in other cell types. The expression of collagen type XV was confirmed at the protein level on isolated osteoblasts and we demonstrated that it significantly increases during the osteogenic differentiation of MSCs in vitro and that free ionised extracellular calcium significantly downmodulates its expression. Moreover, light and electron microscopy showed that collagen type XV is expressed in bone tissue biopsies mainly by working osteoblasts forming new bone tissue or lining bone trabeculae. To our knowledge, these data represent the first evidence of the expression of collagen type XV in human osteoblasts, a calcium-regulated protein which correlates to a specific functional state of these cells.
AB - Bone marrow stromal cells (MSCs) and osteoblasts are the two main non-haematopoietic cellular components of human bone tissue. To identify novel osteoblast-related molecules, we performed a gene expression profiling analysis comparing MSCs and osteoblasts isolated from the same donors. Genes differentially overexpressed in osteoblasts were mainly related to the negative control of cell proliferation, pro-apoptotic processes, protein metabolism and bone remodelling. Notably, we also identified the collagen XV (COL15A1) gene as the most up-regulated gene in osteoblasts compared with MSCs, previously described as being expressed in the basement membrane in other cell types. The expression of collagen type XV was confirmed at the protein level on isolated osteoblasts and we demonstrated that it significantly increases during the osteogenic differentiation of MSCs in vitro and that free ionised extracellular calcium significantly downmodulates its expression. Moreover, light and electron microscopy showed that collagen type XV is expressed in bone tissue biopsies mainly by working osteoblasts forming new bone tissue or lining bone trabeculae. To our knowledge, these data represent the first evidence of the expression of collagen type XV in human osteoblasts, a calcium-regulated protein which correlates to a specific functional state of these cells.
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UR - http://www.scopus.com/inward/citedby.url?scp=67649354589&partnerID=8YFLogxK
U2 - 10.1002/jcp.21779
DO - 10.1002/jcp.21779
M3 - Article
C2 - 19365806
AN - SCOPUS:67649354589
VL - 220
SP - 401
EP - 409
JO - Journal of cellular and comparative physiology
JF - Journal of cellular and comparative physiology
SN - 0021-9541
IS - 2
ER -