The Effect of Lipid Peroxide on Osteoblasts and Vascular Endothelial Cells : The Possible Role of Ischemia-Reperfusion in the Progression of Avascular Necrosis of the Femoral Head
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概要
- 論文の詳細を見る
Many patients undergo operations of the hip joint for avascular necrosis of the femoral head (ANF). Abnormal lipid metabolism in thought to play a certain role in the pathogenesis of ANF. In the present study we have detected the abnormal lipid from the necrotic area of the femoral heads suffering from ANF by gas chromatography-mass spectrometry (GC/MS). This abnormal lipid was supposed to be cholesterol epoxide, because its peak was observed at one oxygen molecular weight larger position than that of cholesterol. However, this abnormal lipid was not found in the femoral heads with osteoarthritis (OA). We also investigated the effect of the lipids (cholesterol and cholesterol epoxide) and corticosteroid (prednisolone) on proliferation of osteoblastic cell line (MC3T3-E1) cells and vascular endothelial cells (EC) derived from human umbilical vein using 3H-thymidine (3H-TdR) incorporation. Cholesterol has no effect on osteoblast proliferation up to 100 micrograms/ml, while cholesterol epoxide inhibited the 3H-TdR incorporation in a dose dependent fashion and a significant suppression was attained at the concentration of 10 micrograms/ml. In contrast, both cholesterol and cholesterol epoxide had suppressive effect on the EC proliferation. DNA synthesis of the osteoblasts was suppressed by prednisolone and additive inhibitory effect was observed in the combination of cholesterol epoxide and prednisolone. None of the free radical scavengers such as mannitol, dimethylsulfoxide (DMSO), super oxide dismutase (SOD) and catalase had significant recovery effect on the suppressed 3H-TdR incorporation of both MC3T3-E1 cells and EC. Only alpha-tocopherol restored the suppressed incorporation of 3H-TdR. These results suggest that lipid peroxide has an important role in the progression of ANF by suppressing the proliferation of osteoblasts and EC.
- 神戸大学の論文
著者
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ITO HIROKO
Department of Medicine, Yokohama Rosai Hospital
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SAEGUSA Yasuhiro
Department of Orthopedic Surgery, Kohnan Hospital
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MIZUNO Kosaku
Department of Orthopaedic Surgery, Kobe University School of Medicine
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Saegusa Yasuhiro
Department Of Orthopaedic Surgery Kobe University Graduate School Of Medicine
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Saegusa Yasuhiro
Department Of Orthopaedic Surgery Kobe University School Of Medicine
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Saegusa Y
Yamanouchi Pharmaceutical Co. Ltd. Tokyo Jpn
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Ito Hiroko
Department Of Endocrinology & Metabolism Yokohama Rosai Hospital
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Mizuno Kosaku
Department Of Orthopaedic Surgery Kobe University School Of Medicine
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Ake Yasushi
Department of Orthopaedic Surgery,Kobe University School of Medicine
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Ake Y
Department Of Orthopaedic Surgery Kobe University School Of Medicine
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Ito Hiroko
Department Of Orthopaedic Surgery Kobe University School Of Medicine
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