Objective:To explore the genetic changes in the progression of castration-resistant prostate cancer(CRPC)and neuroendocrine prostate cancer(NEPC)and the reason why these cancers resist existing therapies.Methods:We em...Objective:To explore the genetic changes in the progression of castration-resistant prostate cancer(CRPC)and neuroendocrine prostate cancer(NEPC)and the reason why these cancers resist existing therapies.Methods:We employed our CRPC cell line microarray and other CRPC or NEPC datasets to screen the target gene NEIL3.Lentiviral transfection and RNA interference were used to construct overexpression and knockdown cell lines.Cell and animal models of radiotherapy were established by using a medical electron linear accelerator.Flow cytometry was used to detect apoptosis or cell cycle progression.Western blot and qPCR were used to detect changes in the protein and RNA levels.Results:TCGA and clinical patient datasets indicated that NEIL3 was downregulated in CRPC and NEPC cell lines,and NEIL3 was correlated with a high Gleason score but a good prognosis.Further functional studies demonstrated that NEIL3 had no effect on the proliferation and migration of PCa cells.However,cell and animal radiotherapy models revealed that NEIL3 could facilitate the radiotherapy sensitivity of PCa cells,while loss of NEIL3 activated radiotherapy resistance.Mechanistically,we found that NEIL3 negatively regulated the expression of ATR,and higher NEIL3 expression repressed the ATR/CHK1 pathway,thus regulating the cell cycle.Conclusions:We demonstrated that NEIL3 may serve as a diagnostic or therapeutic target for therapy-resistant patients.展开更多
MicroRNAs(miRNAs) are endogenous short non-coding RNAs,and play a pivotal role in regulating a variety of cellular processes,including proliferation and apoptosis,both of which are cellular responses to radiation trea...MicroRNAs(miRNAs) are endogenous short non-coding RNAs,and play a pivotal role in regulating a variety of cellular processes,including proliferation and apoptosis,both of which are cellular responses to radiation treatment.In response to radiation,multiple miRNAs show altered expression,which act as oncogenes or tumor suppressors.Recent evidence has also shown that some miRNAs have radiotherapy sensitization or radiation resistance role in malignant tumors.This review focuses on analysis of these characteristics and mechanisms of miRNAs,and will provide some insight into the therapeutic application of radiation.展开更多
基金supported by the National Natural Science Foundation of China(Grant Nos.81672550 and 81974395)Guangdong Basic and Applied Basic Research Foundation(Grant No.2019A1515011437)+4 种基金Guangzhou Science and Technology Cooperation Program(Foreign Research and Development Cooperation)(Grant No.201807010087)Clinical Research 5010 Program of Sun Yat-sen University(Grant No.2019005)Sun Yat-Sen Clinical Research and Cultivation Project of Sun Yat Sen University(Grant No.201702)to Hai Huangsupported by the National Natural Science Foundation of China(Grant No.81702527)supported by the China Scholarship Council(Grant No.201906380075).
文摘Objective:To explore the genetic changes in the progression of castration-resistant prostate cancer(CRPC)and neuroendocrine prostate cancer(NEPC)and the reason why these cancers resist existing therapies.Methods:We employed our CRPC cell line microarray and other CRPC or NEPC datasets to screen the target gene NEIL3.Lentiviral transfection and RNA interference were used to construct overexpression and knockdown cell lines.Cell and animal models of radiotherapy were established by using a medical electron linear accelerator.Flow cytometry was used to detect apoptosis or cell cycle progression.Western blot and qPCR were used to detect changes in the protein and RNA levels.Results:TCGA and clinical patient datasets indicated that NEIL3 was downregulated in CRPC and NEPC cell lines,and NEIL3 was correlated with a high Gleason score but a good prognosis.Further functional studies demonstrated that NEIL3 had no effect on the proliferation and migration of PCa cells.However,cell and animal radiotherapy models revealed that NEIL3 could facilitate the radiotherapy sensitivity of PCa cells,while loss of NEIL3 activated radiotherapy resistance.Mechanistically,we found that NEIL3 negatively regulated the expression of ATR,and higher NEIL3 expression repressed the ATR/CHK1 pathway,thus regulating the cell cycle.Conclusions:We demonstrated that NEIL3 may serve as a diagnostic or therapeutic target for therapy-resistant patients.
文摘MicroRNAs(miRNAs) are endogenous short non-coding RNAs,and play a pivotal role in regulating a variety of cellular processes,including proliferation and apoptosis,both of which are cellular responses to radiation treatment.In response to radiation,multiple miRNAs show altered expression,which act as oncogenes or tumor suppressors.Recent evidence has also shown that some miRNAs have radiotherapy sensitization or radiation resistance role in malignant tumors.This review focuses on analysis of these characteristics and mechanisms of miRNAs,and will provide some insight into the therapeutic application of radiation.
