目的探讨巨噬细胞炎症蛋白⁃1α(MIP⁃1α)拮抗剂联合硼替佐米通过抑制Erk1/2/Bax促进骨髓瘤骨病(myeloma bone disease,MBD)成骨作用。方法采用皮下注射骨髓瘤细胞株方法构建MBD小鼠模型,按药物给予分为对照组、硼替佐米(Bor)组、Bx471(M...目的探讨巨噬细胞炎症蛋白⁃1α(MIP⁃1α)拮抗剂联合硼替佐米通过抑制Erk1/2/Bax促进骨髓瘤骨病(myeloma bone disease,MBD)成骨作用。方法采用皮下注射骨髓瘤细胞株方法构建MBD小鼠模型,按药物给予分为对照组、硼替佐米(Bor)组、Bx471(MIP⁃1α拮抗剂)组、硼替佐米(Bor)联合Bx471(MIP⁃1α拮抗剂)组;ELISA检测MIP⁃1α、SOST、IL⁃6、BALP、RANKL、OPG水平,Western blot检测Erk、Bax、Caspase 3、Caspase 9表达水平,X线评估骨质破坏程度。结果X线显示荷瘤小鼠(对照组)出现病理性骨折,Bor组、Bx471组及Bor联合Bx471组骨质破坏程度低于对照组。对照组的MIP⁃1α、SOST、RANKL、IL⁃6水平高于Bor组及Bx471组(P<0.05),明显高于Bor联合Bx471组(P<0.001),而OPG、BALP的表达明显低于Bor联合Bx471组(P<0.001)。对照组的Erkl/2、Bax、Caspase 3、Caspase 9蛋白表达高于Bor组及Bx471组(P<0.05),且明显高于Bor联合Bx471组(P<0.001)。结论MIP⁃1ɑ拮抗剂联合硼替佐米可能抑制Erk1/2/Bax信号通路促进MBD成骨作用。展开更多
Rice tillering is one of the most important agronomic traits that determine grain yields.Our previous study has demonstrated that the MONOCULM1 （MOC1） gene is a key component that controls the formation of rice till...Rice tillering is one of the most important agronomic traits that determine grain yields.Our previous study has demonstrated that the MONOCULM1 （MOC1） gene is a key component that controls the formation of rice tiller buds.To further elucidate the molecular mechanism of MOC1 involved in the regulation of rice tillering,we performed a yeast-two-hybrid screening to identify MOC1 interacting proteins （MIPs）.Here we reported that MIP1 interacted with MOC1 both in vitro and in vivo.The overexpression of MIP1 resulted in enhanced tillering and reduced plant height.In-depth characterization of the context of MIP1 and MOC1 would further our understanding of molecular regulatory mechanisms of rice tillering.展开更多
基金supported by the grant from the Ministry of Science and Technology of China (No. 2005CB1208)
文摘Rice tillering is one of the most important agronomic traits that determine grain yields.Our previous study has demonstrated that the MONOCULM1 （MOC1） gene is a key component that controls the formation of rice tiller buds.To further elucidate the molecular mechanism of MOC1 involved in the regulation of rice tillering,we performed a yeast-two-hybrid screening to identify MOC1 interacting proteins （MIPs）.Here we reported that MIP1 interacted with MOC1 both in vitro and in vivo.The overexpression of MIP1 resulted in enhanced tillering and reduced plant height.In-depth characterization of the context of MIP1 and MOC1 would further our understanding of molecular regulatory mechanisms of rice tillering.
