摘要
目的探讨高浓度葡萄糖对RANKL诱导破骨细胞分化及Notch信号通路的影响。方法高糖(5-40mmol/L)条件下,RANKL刺激小鼠骨髓源性破骨前体细胞向破骨细胞分化,TRAP染色检测破骨细胞分化情况,实时定量PCR检测Notch信号通路相关基因(Notchl、Notch2、Jaggedl)的表达情况。结果RANKL诱导破骨细胞分化过程中,实验组(20mmol/L和40mmol/L葡萄糖)破骨细胞个数分别为(110.3±6.81)和(72.0±8.0);Notchl相对表达量分别为(1.25±0.43)和(1.14±0.45),Notch2相对表达量分别为(1.65±0.23)和(1.1±0.11),Jaggedl相对表达量分别为(1.16±0.38)和(1.09±0.23);对照组(20mmoUL和40mmol/L甘露醇)破骨细胞个数分别为(152.7±7.0)和(157±12.5),Notchl相对表达量分别为(1.84±0.38)和(1.66±0.40),Notch2相对表达量分别为(2.82±0.28)和(2.42±0.27),Jaggedl相对表达量分别为(1.52±0.26)和(1.45±0.34)。其中,破骨细胞数量和Notch2基因表达量在实验组与对照组问差异具有显著统计学意义(P〈O.05)。结论高浓度葡萄糖抑制Notch信号及破骨细胞分化,该结果提示Notch2信号可能参与高糖抑制破骨细胞分化过程。
Objective To study the effect of high concentration of glucose on RANKL-induccd osteoclas- togcncsis and Notch signaling. Methods Prcostcoclasts wcrc exposed to sustained high concentration of glucose (5--40 mmol/L) to mimic diabetic conditions. Ostcoclast formation was analyzed using tartratc resistant acid phospha- tasc (TRAP) assay. Expression levels of Notchl, Notch2, and Jaggcdl wcrc analyzed using real-time PCR. Results The number of ostcoclast with 20 mmol/L and 40 mmolfL glucose wcrc (II0.3±6.81) and (72.0±8.0) in the study group, significantly less those in the control group, (152.7±7.0) and (157±12.5), respectively. The relative gcnc expres- sion of Notchl with 20 mmol/L and 40 mmol/L glucose were (1.25±0.43) and (l. 14±0.45) in the study group, signifi- cantly less than those in the control group, (1.84±0.38) and (1.66±0.40). The relative gcnc expression of Notch2 with 20 mmol/L and 40 mmol/L glucose wcrc (1.65±0.23) and (l.l±0.11) in the study group, significantly less than those in the control group, (2.82±0.28) and (2.42±0.27). The relative gene expression of Jaggedl with 20 mmol/L and 40 mmol/L glucose were (1.16±0.38) and (1.09±0.23) in the study group, significantly less than those in the control group, (1.52±0.26) and (1.45±0.34). Conclusion High concentration of glucose inhibits RANKL-induced osteoelasto- genesis and Notch2 gene expression. Notch2 signaling might play a role in the inhibitory effect of high concentration of glucose on RANKL-induced osteoclastogenesis.
出处
《海南医学》
CAS
2012年第17期1-3,共3页
Hainan Medical Journal
基金
国家自然科学基金(编号:81000460)
海南省自然科学基金(编号:309040)