The forkhead family members of transcription factors （FoxOs） are expected to be potential cancer-related drug targets and thus are being extremely studied recently. In the present study, FoxO3a, one major member of ...The forkhead family members of transcription factors （FoxOs） are expected to be potential cancer-related drug targets and thus are being extremely studied recently. In the present study, FoxO3a, one major member of this family, was identified to be down-regulated in colorectal cancer through mi- cro-array analysis, which was confirmed by RT-PCR and Western blot in 28 patients. Moreover, immu- nohistochemistry （IHC） showed that the expression levels of FoxO3a were remarkably reduced in 99 cases of primary colorectal cancer, liver metastasis, and even in metaplastic colorectal tissue. IHC also revealed an exclusion of FoxO3a from the nucleus of most cells of tumor-associated tissues. Silencing FoxO3a by siRNA led to elevation of G2-M phase cells. We conclude that the downregulation of FoxO3a may greatly contribute to tumor development, and thus FoxO3a may represent a novel thera- peutic target in colorectal cancer.展开更多
OBJECTIVE:To primarily explore the effect and mechanism of Wenshen Yangxue decoction(温肾养血方)in promoting follicular development in elderly female mice.METHODS:Fifty Institute of Cancer Research mice were randomly ...OBJECTIVE:To primarily explore the effect and mechanism of Wenshen Yangxue decoction(温肾养血方)in promoting follicular development in elderly female mice.METHODS:Fifty Institute of Cancer Research mice were randomly divided into blank,controlled ovarian hyperstimulation(COH),low-dose Wenshen Yangxue decoction,medium-dose Wenshen Yangxue decoction,and high-dose Wenshen Yangxue decoction groups,with 10 mice in each group.The number of ovulations,number of fertilizations,mitochondrial adenosine triphosphate(ATP)level,and mitochondrial DNA(mt DNA)of oocytes in each group were compared.Reverse transcriptionpolymerase chain reaction and Western blotting were used to detect the m RNA and protein expression levels of silent information regulator 3(Sirt3)and forkhead transcription factor O13a(FOXO3a).RESULTS:Wenshen Yangxue decoction significantly increased the number of ovulations in mice(P<0.05)and promoted the formation of fertilized eggs.The ATP level and mt DNA copy number of mice oocytes in the highdose groups were significantly higher than those in the COH group(P<0.05).Wenshen Yangxue decoction significantly increased the m RNA and protein levels of Sirt3 and FOXO3a in mouse oocytes.CONCLUSION:Wenshen Yangxue decoction promoted the development of follicles in elderly female mice,increased the number of ovulations and improved fertility.Its mechanism may be related to increased mitochondrial energy metabolism and regulation of the Sirt3/FOXO3a pathway.展开更多
The forkhead transcription factors FOXO and FOXM1 have pivotal roles in tumorigenesis and in mediating chemotherapy sensitivity and resistance.Recent research shows that the forkhead transcription factor FOXM1 is a di...The forkhead transcription factors FOXO and FOXM1 have pivotal roles in tumorigenesis and in mediating chemotherapy sensitivity and resistance.Recent research shows that the forkhead transcription factor FOXM1 is a direct transcriptional target repressed by the forkhead protein FOXO3a,a vital downstream effector of the PI3K-AKT-FOXO signaling pathway.Intriguingly,FOXM1 and FOXO3a also compete for binding to the same gene targets,which have a role in chemotherapeutic drug action and sensitivity.An understanding of the role and regulation of the FOXO-FOXM1 axis will impact directly on our knowledge of chemotherapeutic drug action and resistance in patients,and provide new insights into the design of novel therapeutic strategy and reliable biomarkers for prediction of drug sensitivity.展开更多
目的观察白斑颗粒Ⅰ号方对白癜风患者Foxp3 m RNA表达的影响,阐明白斑Ⅰ号方治疗白癜风的作用机制。方法白癜风患者60例,随机分为试验组和对照组各30例,健康对照组30例,采用RT-PCR方法检测各组PBMC中Foxp3 m RNA表达变化情况。结果白癜...目的观察白斑颗粒Ⅰ号方对白癜风患者Foxp3 m RNA表达的影响,阐明白斑Ⅰ号方治疗白癜风的作用机制。方法白癜风患者60例,随机分为试验组和对照组各30例,健康对照组30例,采用RT-PCR方法检测各组PBMC中Foxp3 m RNA表达变化情况。结果白癜风患者组Foxp3 m RNA水平低于健康对照组,差异有统计学意义(P<0.05);实验组治疗3个月后Foxp3 m RNA水平高于治疗前,差异有统计学意义(P<0.05);对照组治疗3个月后Foxp3 m RNA水平高于治疗前,差异有统计学意义(P<0.05);治疗3个月后,实验组治疗前后外周血Foxp3 m RNA升高值高于对照组治疗前后外周血Foxp3 m RNA升高值,差异有统计学意义(P<0.05)。结论白斑颗粒Ⅰ号可能通过上调调节T细胞功能,使PBMC Foxp3 m RNA恢复或接近正常水平达到治疗白癜风的目的。展开更多
基金supported by the grants from 973 Program Project from Ministry of Science and Technology in China(No.2009CB521802)National Natural Science Foundation of China(No.30872472,No.30973496,and No.30800569)
文摘The forkhead family members of transcription factors （FoxOs） are expected to be potential cancer-related drug targets and thus are being extremely studied recently. In the present study, FoxO3a, one major member of this family, was identified to be down-regulated in colorectal cancer through mi- cro-array analysis, which was confirmed by RT-PCR and Western blot in 28 patients. Moreover, immu- nohistochemistry （IHC） showed that the expression levels of FoxO3a were remarkably reduced in 99 cases of primary colorectal cancer, liver metastasis, and even in metaplastic colorectal tissue. IHC also revealed an exclusion of FoxO3a from the nucleus of most cells of tumor-associated tissues. Silencing FoxO3a by siRNA led to elevation of G2-M phase cells. We conclude that the downregulation of FoxO3a may greatly contribute to tumor development, and thus FoxO3a may represent a novel thera- peutic target in colorectal cancer.
基金Supported by Grants from the Beijing Natural Science Foundation:Study on the Effect of Wenshen Yangxue Recipe on Improving the Quality of Oocytes in Aged Female Mice based on Sirt3/FoxO3a Pathway(No.7192068)National Natural Science Foundation of China:Research on the Pathogenesis of Methyl Group Deletion Caused by One Novel Mutation of BRCA2 Gene in Patients from Families at Risk of Hereditary Ovarian Cancer and Breast Cancer(No.8972444)
文摘OBJECTIVE:To primarily explore the effect and mechanism of Wenshen Yangxue decoction(温肾养血方)in promoting follicular development in elderly female mice.METHODS:Fifty Institute of Cancer Research mice were randomly divided into blank,controlled ovarian hyperstimulation(COH),low-dose Wenshen Yangxue decoction,medium-dose Wenshen Yangxue decoction,and high-dose Wenshen Yangxue decoction groups,with 10 mice in each group.The number of ovulations,number of fertilizations,mitochondrial adenosine triphosphate(ATP)level,and mitochondrial DNA(mt DNA)of oocytes in each group were compared.Reverse transcriptionpolymerase chain reaction and Western blotting were used to detect the m RNA and protein expression levels of silent information regulator 3(Sirt3)and forkhead transcription factor O13a(FOXO3a).RESULTS:Wenshen Yangxue decoction significantly increased the number of ovulations in mice(P<0.05)and promoted the formation of fertilized eggs.The ATP level and mt DNA copy number of mice oocytes in the highdose groups were significantly higher than those in the COH group(P<0.05).Wenshen Yangxue decoction significantly increased the m RNA and protein levels of Sirt3 and FOXO3a in mouse oocytes.CONCLUSION:Wenshen Yangxue decoction promoted the development of follicles in elderly female mice,increased the number of ovulations and improved fertility.Its mechanism may be related to increased mitochondrial energy metabolism and regulation of the Sirt3/FOXO3a pathway.
基金sponsored by Breast Cancer Campaign,Cancer Research UK,Imperial College NHS Health Trust.
文摘The forkhead transcription factors FOXO and FOXM1 have pivotal roles in tumorigenesis and in mediating chemotherapy sensitivity and resistance.Recent research shows that the forkhead transcription factor FOXM1 is a direct transcriptional target repressed by the forkhead protein FOXO3a,a vital downstream effector of the PI3K-AKT-FOXO signaling pathway.Intriguingly,FOXM1 and FOXO3a also compete for binding to the same gene targets,which have a role in chemotherapeutic drug action and sensitivity.An understanding of the role and regulation of the FOXO-FOXM1 axis will impact directly on our knowledge of chemotherapeutic drug action and resistance in patients,and provide new insights into the design of novel therapeutic strategy and reliable biomarkers for prediction of drug sensitivity.
文摘目的观察白斑颗粒Ⅰ号方对白癜风患者Foxp3 m RNA表达的影响,阐明白斑Ⅰ号方治疗白癜风的作用机制。方法白癜风患者60例,随机分为试验组和对照组各30例,健康对照组30例,采用RT-PCR方法检测各组PBMC中Foxp3 m RNA表达变化情况。结果白癜风患者组Foxp3 m RNA水平低于健康对照组,差异有统计学意义(P<0.05);实验组治疗3个月后Foxp3 m RNA水平高于治疗前,差异有统计学意义(P<0.05);对照组治疗3个月后Foxp3 m RNA水平高于治疗前,差异有统计学意义(P<0.05);治疗3个月后,实验组治疗前后外周血Foxp3 m RNA升高值高于对照组治疗前后外周血Foxp3 m RNA升高值,差异有统计学意义(P<0.05)。结论白斑颗粒Ⅰ号可能通过上调调节T细胞功能,使PBMC Foxp3 m RNA恢复或接近正常水平达到治疗白癜风的目的。
