Effect of Risedronate on Osteoblast Differentiation, Expression of Receptor Activator of NF‐κB Ligand and Apoptosis in Mesenchymal Stem Cells

:  Nitrogen‐containing bisphosphonates (BPs) are antiresorptive drugs used for the treatment of metabolic bone diseases. Bone marrow stromal cells such as mesenchymal stem cells (MSCs) and MSC‐derived osteoblasts that originate from MSCs are known to regulate osteoclast differentiation and activatio...

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Veröffentlicht in:Basic & clinical pharmacology & toxicology 2011-08, Vol.109 (2), p.78-84
Hauptverfasser: Fujita, Hirofumi, Kurokawa, Kazuko, Ogino, Tetsuya, Ono, Mio, Yamamoto, Masanao, Oka, Takashi, Nakanishi, Tohru, Kobayashi, Naoya, Tanaka, Noriaki, Ogawa, Tomohiro, Suzaki, Etsuko, Utsumi, Kozo, Sasaki, Junzo
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container_title Basic & clinical pharmacology & toxicology
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creator Fujita, Hirofumi
Kurokawa, Kazuko
Ogino, Tetsuya
Ono, Mio
Yamamoto, Masanao
Oka, Takashi
Nakanishi, Tohru
Kobayashi, Naoya
Tanaka, Noriaki
Ogawa, Tomohiro
Suzaki, Etsuko
Utsumi, Kozo
Sasaki, Junzo
description :  Nitrogen‐containing bisphosphonates (BPs) are antiresorptive drugs used for the treatment of metabolic bone diseases. Bone marrow stromal cells such as mesenchymal stem cells (MSCs) and MSC‐derived osteoblasts that originate from MSCs are known to regulate osteoclast differentiation and activation via the expression of receptor activator of NF‐κB ligand (RANKL). Although the effects of nitrogen‐containing BPs on osteoclasts and osteoblasts have been well investigated, their effects in MSCs have not been clarified. In this study, we investigated the effects of risedronate (RIS), a nitrogen‐containing BP, on osteoblast differentiation, RANKL expression and apoptosis in human and rat MSCs. RIS suppressed the formation of mineralized nodules and mRNA expression of differentiation marker genes such as bone sialoprotein and osteocalcin in MSC‐derived osteoblasts. The RANKL expression induced by 1,25‐(OH)2 vitamin D3 was not affected by RIS in human MSC‐derived osteoblasts. In addition, treatment with high‐concentration RIS induced chromatin condensation, an apoptosis feature, in MSCs. RIS‐induced chromatin condensation was suppressed by a pan‐caspase inhibitor zVAD‐FMK and a cell‐permeable isoprenoid analogue geranylgeraniol. These results indicate that RIS suppressed osteoblast differentiation and induced caspase‐ and isoprenoid depletion‐dependent apoptosis and suggest that the antiresorptive effect of RIS is not mediated by a decrease in the RANKL expression in MSC‐derived osteoblasts.
doi_str_mv 10.1111/j.1742-7843.2011.00685.x
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Bone marrow stromal cells such as mesenchymal stem cells (MSCs) and MSC‐derived osteoblasts that originate from MSCs are known to regulate osteoclast differentiation and activation via the expression of receptor activator of NF‐κB ligand (RANKL). Although the effects of nitrogen‐containing BPs on osteoclasts and osteoblasts have been well investigated, their effects in MSCs have not been clarified. In this study, we investigated the effects of risedronate (RIS), a nitrogen‐containing BP, on osteoblast differentiation, RANKL expression and apoptosis in human and rat MSCs. RIS suppressed the formation of mineralized nodules and mRNA expression of differentiation marker genes such as bone sialoprotein and osteocalcin in MSC‐derived osteoblasts. The RANKL expression induced by 1,25‐(OH)2 vitamin D3 was not affected by RIS in human MSC‐derived osteoblasts. In addition, treatment with high‐concentration RIS induced chromatin condensation, an apoptosis feature, in MSCs. RIS‐induced chromatin condensation was suppressed by a pan‐caspase inhibitor zVAD‐FMK and a cell‐permeable isoprenoid analogue geranylgeraniol. 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Bone marrow stromal cells such as mesenchymal stem cells (MSCs) and MSC‐derived osteoblasts that originate from MSCs are known to regulate osteoclast differentiation and activation via the expression of receptor activator of NF‐κB ligand (RANKL). Although the effects of nitrogen‐containing BPs on osteoclasts and osteoblasts have been well investigated, their effects in MSCs have not been clarified. In this study, we investigated the effects of risedronate (RIS), a nitrogen‐containing BP, on osteoblast differentiation, RANKL expression and apoptosis in human and rat MSCs. RIS suppressed the formation of mineralized nodules and mRNA expression of differentiation marker genes such as bone sialoprotein and osteocalcin in MSC‐derived osteoblasts. The RANKL expression induced by 1,25‐(OH)2 vitamin D3 was not affected by RIS in human MSC‐derived osteoblasts. In addition, treatment with high‐concentration RIS induced chromatin condensation, an apoptosis feature, in MSCs. 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RIS‐induced chromatin condensation was suppressed by a pan‐caspase inhibitor zVAD‐FMK and a cell‐permeable isoprenoid analogue geranylgeraniol. These results indicate that RIS suppressed osteoblast differentiation and induced caspase‐ and isoprenoid depletion‐dependent apoptosis and suggest that the antiresorptive effect of RIS is not mediated by a decrease in the RANKL expression in MSC‐derived osteoblasts.</abstract><cop>Oxford, UK</cop><pub>Blackwell Publishing Ltd</pub><pmid>21332944</pmid><doi>10.1111/j.1742-7843.2011.00685.x</doi><tpages>7</tpages><oa>free_for_read</oa></addata></record>
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subjects Animals
Apoptosis - drug effects
Biological and medical sciences
Bone Density Conservation Agents - pharmacology
Cell Differentiation - drug effects
Cells, Cultured
Etidronic Acid - analogs & derivatives
Etidronic Acid - pharmacology
Humans
Medical sciences
Mesenchymal Stromal Cells - cytology
Mesenchymal Stromal Cells - drug effects
Osteoblasts - cytology
Osteoblasts - drug effects
Pharmacology. Drug treatments
RANK Ligand - analysis
Rats
Risedronate Sodium
title Effect of Risedronate on Osteoblast Differentiation, Expression of Receptor Activator of NF‐κB Ligand and Apoptosis in Mesenchymal Stem Cells
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