Synthesis of membrane‐ and matrix‐bound colony‐stimulating factor‐1 by cultured osteoblasts
Identifieur interne : 002628 ( Istex/Curation ); précédent : 002627; suivant : 002629Synthesis of membrane‐ and matrix‐bound colony‐stimulating factor‐1 by cultured osteoblasts
Auteurs : Rolf Felix [Suisse] ; Judit Halasy-Nagy [Suisse] ; Antoinette Wetterwald [Suisse] ; Marco G. Cecchini [Suisse] ; Herbert Fleisch [Suisse] ; Willy Hofstetter [Suisse]Source :
- Journal of Cellular Physiology [ 0021-9541 ] ; 1996-02.
English descriptors
- KwdEn :
- Antiserum, Antonioli corboz, Ascorbate, Biol, Bone resorption, Cecchini, Cell layer, Cell layers, Cell line, Cell lines, Cell membrane, Cell number, Confluence, Control serum, Cydmet, Cytokine, Encoding, Exon, Exposure time, Extracellular matrix, Fleisch, Glycosaminoglycan chain, Growth factor, Hofstetter, Human cells, Hybridization, Macrophage, Macrophage cell line, Macrophage colony, Macrophage factor, Matrix, Mature osteoclasts, Membrane, Membrane fractions, Molecular forms, Murine, Nacl, Nonreducing, Nonreducing conditions, Ohtsuki, Oplop mouse, Osteoblast, Osteoblastic, Osteoblastic cells, Osteoclast, Osteoclast formation, Precursor, Present study, Primary osteoblasts, Primer, Primer pairs, Proteoglycan, Proteoglycan form, Receptor, Resorption, Rettenmier, Southern hybridization, Stromal cells, Supernatant, Suzu, Transcript, Transcripts encoding, Trypsin.
- Teeft :
- Antiserum, Antonioli corboz, Ascorbate, Biol, Bone resorption, Cecchini, Cell layer, Cell layers, Cell line, Cell lines, Cell membrane, Cell number, Confluence, Control serum, Cydmet, Cytokine, Encoding, Exon, Exposure time, Extracellular matrix, Fleisch, Glycosaminoglycan chain, Growth factor, Hofstetter, Human cells, Hybridization, Macrophage, Macrophage cell line, Macrophage colony, Macrophage factor, Matrix, Mature osteoclasts, Membrane, Membrane fractions, Molecular forms, Murine, Nacl, Nonreducing, Nonreducing conditions, Ohtsuki, Oplop mouse, Osteoblast, Osteoblastic, Osteoblastic cells, Osteoclast, Osteoclast formation, Precursor, Present study, Primary osteoblasts, Primer, Primer pairs, Proteoglycan, Proteoglycan form, Receptor, Resorption, Rettenmier, Southern hybridization, Stromal cells, Supernatant, Suzu, Transcript, Transcripts encoding, Trypsin.
Abstract
Colony‐stimulating factor‐1 (CSF‐1) is synthesized as a secreted or membrane‐bound molecule. We investigated whether osteoblastic cells produce these forms of CSF‐1. Glutaraldehyde‐fixed cell layers supported proliferation of the macrophage cell line BAC1.2F5, suggesting the presence of membrane‐ or/and matrix‐associated CSF‐1. Furthermore, CSF‐1 activity could be either extracted from the matrix or released from the cell membrane. A neutralizing antiserum against CSF‐1 inhibited these activities. After labeling the cellular proteins with [35S] met/cys or [35S] SO2−4, CSF‐1 was immunoprecipitated and analyzed by SDS‐PAGE. Under nonreducing conditions, bands with MW more than 200, 200, 100, and 50 kd were detected. These bands shifted to lower MW under reducing conditions. Treatment with chondroitin lyase ABC decreased the MW of the 200 kd monomer, proving the proteoglycan structure. Much smaller quantities of CSF‐1 were found in the matrix extract than in the conditioned medium. Transforming growth factor β (TGF‐β) increased both the synthesis of CSF‐1 and its accumulation in the matrix. CSF‐1 released with trypsin from the membrane fraction yielded on SDS‐PAGE a band with MW of 60 and 30 kd under nonreducing and reducing conditions, respectively. Transcripts encoding both the secreted and the membrane‐associated forms of the cytokine were detected in osteoblasts by reverse transcription polymerase chain reaction. These data indicate that osteoblastic cells produce the secreted forms, either remaining in the culture supernatant, or being associated to the matrix, and the membrane associated form of CSF‐1. © 1996 Wiley‐Liss, Inc.
Url:
DOI: 10.1002/(SICI)1097-4652(199602)166:2<311::AID-JCP9>3.0.CO;2-S
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<term>Antonioli corboz</term>
<term>Ascorbate</term>
<term>Biol</term>
<term>Bone resorption</term>
<term>Cecchini</term>
<term>Cell layer</term>
<term>Cell layers</term>
<term>Cell line</term>
<term>Cell lines</term>
<term>Cell membrane</term>
<term>Cell number</term>
<term>Confluence</term>
<term>Control serum</term>
<term>Cydmet</term>
<term>Cytokine</term>
<term>Encoding</term>
<term>Exon</term>
<term>Exposure time</term>
<term>Extracellular matrix</term>
<term>Fleisch</term>
<term>Glycosaminoglycan chain</term>
<term>Growth factor</term>
<term>Hofstetter</term>
<term>Human cells</term>
<term>Hybridization</term>
<term>Macrophage</term>
<term>Macrophage cell line</term>
<term>Macrophage colony</term>
<term>Macrophage factor</term>
<term>Matrix</term>
<term>Mature osteoclasts</term>
<term>Membrane</term>
<term>Membrane fractions</term>
<term>Molecular forms</term>
<term>Murine</term>
<term>Nacl</term>
<term>Nonreducing</term>
<term>Nonreducing conditions</term>
<term>Ohtsuki</term>
<term>Oplop mouse</term>
<term>Osteoblast</term>
<term>Osteoblastic</term>
<term>Osteoblastic cells</term>
<term>Osteoclast</term>
<term>Osteoclast formation</term>
<term>Precursor</term>
<term>Present study</term>
<term>Primary osteoblasts</term>
<term>Primer</term>
<term>Primer pairs</term>
<term>Proteoglycan</term>
<term>Proteoglycan form</term>
<term>Receptor</term>
<term>Resorption</term>
<term>Rettenmier</term>
<term>Southern hybridization</term>
<term>Stromal cells</term>
<term>Supernatant</term>
<term>Suzu</term>
<term>Transcript</term>
<term>Transcripts encoding</term>
<term>Trypsin</term>
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<term>Ascorbate</term>
<term>Biol</term>
<term>Bone resorption</term>
<term>Cecchini</term>
<term>Cell layer</term>
<term>Cell layers</term>
<term>Cell line</term>
<term>Cell lines</term>
<term>Cell membrane</term>
<term>Cell number</term>
<term>Confluence</term>
<term>Control serum</term>
<term>Cydmet</term>
<term>Cytokine</term>
<term>Encoding</term>
<term>Exon</term>
<term>Exposure time</term>
<term>Extracellular matrix</term>
<term>Fleisch</term>
<term>Glycosaminoglycan chain</term>
<term>Growth factor</term>
<term>Hofstetter</term>
<term>Human cells</term>
<term>Hybridization</term>
<term>Macrophage</term>
<term>Macrophage cell line</term>
<term>Macrophage colony</term>
<term>Macrophage factor</term>
<term>Matrix</term>
<term>Mature osteoclasts</term>
<term>Membrane</term>
<term>Membrane fractions</term>
<term>Molecular forms</term>
<term>Murine</term>
<term>Nacl</term>
<term>Nonreducing</term>
<term>Nonreducing conditions</term>
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<term>Oplop mouse</term>
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<term>Osteoblastic cells</term>
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<term>Osteoclast formation</term>
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<term>Present study</term>
<term>Primary osteoblasts</term>
<term>Primer</term>
<term>Primer pairs</term>
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<term>Proteoglycan form</term>
<term>Receptor</term>
<term>Resorption</term>
<term>Rettenmier</term>
<term>Southern hybridization</term>
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<term>Supernatant</term>
<term>Suzu</term>
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<front><div type="abstract" xml:lang="en">Colony‐stimulating factor‐1 (CSF‐1) is synthesized as a secreted or membrane‐bound molecule. We investigated whether osteoblastic cells produce these forms of CSF‐1. Glutaraldehyde‐fixed cell layers supported proliferation of the macrophage cell line BAC1.2F5, suggesting the presence of membrane‐ or/and matrix‐associated CSF‐1. Furthermore, CSF‐1 activity could be either extracted from the matrix or released from the cell membrane. A neutralizing antiserum against CSF‐1 inhibited these activities. After labeling the cellular proteins with [35S] met/cys or [35S] SO2−4, CSF‐1 was immunoprecipitated and analyzed by SDS‐PAGE. Under nonreducing conditions, bands with MW more than 200, 200, 100, and 50 kd were detected. These bands shifted to lower MW under reducing conditions. Treatment with chondroitin lyase ABC decreased the MW of the 200 kd monomer, proving the proteoglycan structure. Much smaller quantities of CSF‐1 were found in the matrix extract than in the conditioned medium. Transforming growth factor β (TGF‐β) increased both the synthesis of CSF‐1 and its accumulation in the matrix. CSF‐1 released with trypsin from the membrane fraction yielded on SDS‐PAGE a band with MW of 60 and 30 kd under nonreducing and reducing conditions, respectively. Transcripts encoding both the secreted and the membrane‐associated forms of the cytokine were detected in osteoblasts by reverse transcription polymerase chain reaction. These data indicate that osteoblastic cells produce the secreted forms, either remaining in the culture supernatant, or being associated to the matrix, and the membrane associated form of CSF‐1. © 1996 Wiley‐Liss, Inc.</div>
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