Molecular target inhibitors have been regularly approved by Food and Drug Administration(FDA)for tumor treatment,and most of them intervene in tumor cell proliferation and metabolism.The RAS-RAF-MEK-ERK pathway is a c...Molecular target inhibitors have been regularly approved by Food and Drug Administration(FDA)for tumor treatment,and most of them intervene in tumor cell proliferation and metabolism.The RAS-RAF-MEK-ERK pathway is a conserved signaling pathway that plays vital roles in cell proliferation,survival,and differentiation.The aberrant activation of the RAS-RAF-MEK-ERK signaling pathway induces tumors.About 33%of tumors harbor RAS mutations,while 8%of tumors are driven by RAF mutations.Great efforts have been dedicated to targeting the signaling pathway for cancer treatment in the past decades.In this review,we summarized the development of inhibitors targeting the RAS-RAF-MEK-ERK pathway with an emphasis on those used in clinical treatment.Moreover,we discussed the potential combinations of inhibitors that target the RAS-RAF-MEK-ERK signaling pathway and other signaling pathways.The inhibitors targeting the RAS-RAF-MEK-ERK pathway have essentially modified the therapeutic strategy against various cancers and deserve more attention in the current cancerresearchandtreatment.展开更多
Abnormal activation of the Ras/Raf/Mek/Erk signaling cascade plays an important role in glioma. Inhibition of this aberrant activity could effectively hinder glioma cell proliferation and promote cell apoptosis. To in...Abnormal activation of the Ras/Raf/Mek/Erk signaling cascade plays an important role in glioma. Inhibition of this aberrant activity could effectively hinder glioma cell proliferation and promote cell apoptosis. To investigate the mechanism of gJioblastoma treatment by neural stem ceiJ trans- plantation with respect to the Ras/Raf/Mek/Erk pathway, C6 glioma cells were prepared in sus- pension and then infused into the rat brain to establish a glioblastoma model. Neural stem cells isolated from fetal rats were then injected into the brain of this glioblastoma model. Results showed that Raf-1, Erk and Bcl-2 protein expression significantly increased, while Caspase-3 protein expression decreased. After transplantation of neural stem cells, Raf-1, Erk and Bcl-2 protein expression significantly decreased, while Caspase-3 protein expression significantly in-creased. Our findings indicate that transplantation of neural stem cells may promote apoptosis of glioma cells by inhibiting Ras/Raf/Mek/Erk signaling, and thus may represent a novel treatment approach for glioblastoma.展开更多
基金This work is supported by the Key R&D Project of Sichuan Province,China(No.2020YFS0553)the National Science Fund for Excellent Young Scholars,China(No.32122052)the National Natural Science Foundation Regional Innovation and Development,China(No.U19A2003).
文摘Molecular target inhibitors have been regularly approved by Food and Drug Administration(FDA)for tumor treatment,and most of them intervene in tumor cell proliferation and metabolism.The RAS-RAF-MEK-ERK pathway is a conserved signaling pathway that plays vital roles in cell proliferation,survival,and differentiation.The aberrant activation of the RAS-RAF-MEK-ERK signaling pathway induces tumors.About 33%of tumors harbor RAS mutations,while 8%of tumors are driven by RAF mutations.Great efforts have been dedicated to targeting the signaling pathway for cancer treatment in the past decades.In this review,we summarized the development of inhibitors targeting the RAS-RAF-MEK-ERK pathway with an emphasis on those used in clinical treatment.Moreover,we discussed the potential combinations of inhibitors that target the RAS-RAF-MEK-ERK signaling pathway and other signaling pathways.The inhibitors targeting the RAS-RAF-MEK-ERK pathway have essentially modified the therapeutic strategy against various cancers and deserve more attention in the current cancerresearchandtreatment.
文摘Abnormal activation of the Ras/Raf/Mek/Erk signaling cascade plays an important role in glioma. Inhibition of this aberrant activity could effectively hinder glioma cell proliferation and promote cell apoptosis. To investigate the mechanism of gJioblastoma treatment by neural stem ceiJ trans- plantation with respect to the Ras/Raf/Mek/Erk pathway, C6 glioma cells were prepared in sus- pension and then infused into the rat brain to establish a glioblastoma model. Neural stem cells isolated from fetal rats were then injected into the brain of this glioblastoma model. Results showed that Raf-1, Erk and Bcl-2 protein expression significantly increased, while Caspase-3 protein expression decreased. After transplantation of neural stem cells, Raf-1, Erk and Bcl-2 protein expression significantly decreased, while Caspase-3 protein expression significantly in-creased. Our findings indicate that transplantation of neural stem cells may promote apoptosis of glioma cells by inhibiting Ras/Raf/Mek/Erk signaling, and thus may represent a novel treatment approach for glioblastoma.
