AIM: To investigate whether Tg737 is regulated by micro RNA-548a-5p(mi R-548a-5p), and correlates with hepatocellular carcinoma(HCC) cell proliferation and apoptosis.METHODS: Assays of loss of function of Tg737 were p...AIM: To investigate whether Tg737 is regulated by micro RNA-548a-5p(mi R-548a-5p), and correlates with hepatocellular carcinoma(HCC) cell proliferation and apoptosis.METHODS: Assays of loss of function of Tg737 were performed by the colony formation assay, CCK assay and cell cycle assay in HCC cell lines. The interaction between mi R-548a-5p and its downstream target, Tg737, was evaluated by a dual-luciferase reporter assay and quantitative real-time polymerase chain reaction. Tg737 was then up-regulated in HCC cells to evaluate its effect on mi R-548a-5p regulation. Hep G2 cells stably overexpressing mi R-548a-5p or mi R-control were also subcutaneously inoculated into nude mice to evaluate the effect of mi R-548a-5p up-regulation on in vivo tumor growth. As the final step, the effect of mi R-548a-5p on the apoptosis induced by cisplatin was evaluated by flow cytometry.RESULTS: Down-regulation of Tg737, which is a target gene of mi R-548a-5p, accelerated HCC cell proliferation, and mi R-548a-5p promoted HCC cell proliferation in vitro and in vivo. Like the downregulation of Tg737, overexpression of mi R-548a-5p in HCC cell lines promoted cell proliferation, increased colony forming ability and hampered cell apoptosis. In addition, mi R-548a-5p overexpression increased HCC cell growth in vivo. Mi R-548a-5p downregulated Tg737 expression through direct contact with its 3' untranslated region(UTR), and mi R-548a-5p expression was negatively correlated with Tg737 levels in HCC specimens. Restoring Tg737(without the 3'UTR) significantly hampered mi R-548a-5p induced cell proliferation, and rescued the mi R-548a-5p induced cell proliferation inhibition and apoptosis induced by cisplatin.CONCLUSION: Mi R-548a-5p negatively regulates the tumor inhibitor gene Tg737 and promotes tumorigenesis in vitro and in vivo, indicating its potential as a novel therapeutic target for HCC.展开更多
Phosphorus(P)is essential for living plants,and P deficiency is one of the key factors limiting the yield in rapeseed production worldwide.As the most important organ for plants,root morphology traits(RMTs)play a key ...Phosphorus(P)is essential for living plants,and P deficiency is one of the key factors limiting the yield in rapeseed production worldwide.As the most important organ for plants,root morphology traits(RMTs)play a key role in P absorption.To investigate the genetic variability of RMT under low P availability,we dissected the genetic structure of RMTs by genome-wide association studies(GWAS),linkage mapping and candidate gene association studies(CGAS).A total of 52 suggestive loci were associated with RMTs under P stress conditions in 405 oilseed rape accessions.The purple acid phosphatase gene BnPAP17 was found to control the lateral root number(LRN)and root dry weight(RDW)under low P stress.The expression of BnPAP17 was increased in shoot tissue in P-efficient cultivars compared to root tissue and P-inefficient cultivars in response to low P stress.Moreover,the haplotype of BnPAP17^(Hap3)was detected for the selective breeding of P efficiency in oilseed rape.Over-expression of the BnPAP17^(Hap3)could promote the shoot and root growth with enhanced tolerance to low P stress and organic phosphorus(Po)utilization in oilseed rape.Collectively,these findings increase our understanding of the mechanisms underlying BnPAP17-mediated low P stress tolerance in oilseed rape.展开更多
Objective:To provide new insights for the evaluation and diagnosis of chronic neck pain(CNP).Methods:22 patients with CNP and 22 healthy individuals were recruited from South China Normal University,who were all colle...Objective:To provide new insights for the evaluation and diagnosis of chronic neck pain(CNP).Methods:22 patients with CNP and 22 healthy individuals were recruited from South China Normal University,who were all college students.The subjects'neck extensor muscle strength in the head neutral position,the natural anteversion position,and the maximum forward flexion position were measured by an isometric muscle strength tester respectively.The neck extensor strength of CNP patients and healthy subjects were compared.Results:In the neutral position,the maximum isometric muscle strength of neck extensor muscles was 12.31 kg for CNP patients and 15.16 kg for healthy individuals,resulting in a ratio of 81%strength in patients compared to healthy subjects.This difference was highly significant(P<0.000).In the natural anteversion position,the respective values were 12.6 kg for CNP patients and 15.05 kg for healthy individuals,with a ratio of 83%,and a significant difference between groups(P<0.001).In the maximum forward flexion position of the head,the values were 13.36 kg for CNP patients and 16.15 kg for healthy individuals,with a ratio of 82%,and a highly significant difference(P<0.000).Conclusion:The neck extensor muscle strength levels in college students with CNP were significantly lower compared to healthy college students across all measured positions.展开更多
基金Supported by National Natural Science Foundation of ChinaNo.81272648
文摘AIM: To investigate whether Tg737 is regulated by micro RNA-548a-5p(mi R-548a-5p), and correlates with hepatocellular carcinoma(HCC) cell proliferation and apoptosis.METHODS: Assays of loss of function of Tg737 were performed by the colony formation assay, CCK assay and cell cycle assay in HCC cell lines. The interaction between mi R-548a-5p and its downstream target, Tg737, was evaluated by a dual-luciferase reporter assay and quantitative real-time polymerase chain reaction. Tg737 was then up-regulated in HCC cells to evaluate its effect on mi R-548a-5p regulation. Hep G2 cells stably overexpressing mi R-548a-5p or mi R-control were also subcutaneously inoculated into nude mice to evaluate the effect of mi R-548a-5p up-regulation on in vivo tumor growth. As the final step, the effect of mi R-548a-5p on the apoptosis induced by cisplatin was evaluated by flow cytometry.RESULTS: Down-regulation of Tg737, which is a target gene of mi R-548a-5p, accelerated HCC cell proliferation, and mi R-548a-5p promoted HCC cell proliferation in vitro and in vivo. Like the downregulation of Tg737, overexpression of mi R-548a-5p in HCC cell lines promoted cell proliferation, increased colony forming ability and hampered cell apoptosis. In addition, mi R-548a-5p overexpression increased HCC cell growth in vivo. Mi R-548a-5p downregulated Tg737 expression through direct contact with its 3' untranslated region(UTR), and mi R-548a-5p expression was negatively correlated with Tg737 levels in HCC specimens. Restoring Tg737(without the 3'UTR) significantly hampered mi R-548a-5p induced cell proliferation, and rescued the mi R-548a-5p induced cell proliferation inhibition and apoptosis induced by cisplatin.CONCLUSION: Mi R-548a-5p negatively regulates the tumor inhibitor gene Tg737 and promotes tumorigenesis in vitro and in vivo, indicating its potential as a novel therapeutic target for HCC.
基金financially supported by the National Natural Science Foundation of China(32201868 and 32001575)。
文摘Phosphorus(P)is essential for living plants,and P deficiency is one of the key factors limiting the yield in rapeseed production worldwide.As the most important organ for plants,root morphology traits(RMTs)play a key role in P absorption.To investigate the genetic variability of RMT under low P availability,we dissected the genetic structure of RMTs by genome-wide association studies(GWAS),linkage mapping and candidate gene association studies(CGAS).A total of 52 suggestive loci were associated with RMTs under P stress conditions in 405 oilseed rape accessions.The purple acid phosphatase gene BnPAP17 was found to control the lateral root number(LRN)and root dry weight(RDW)under low P stress.The expression of BnPAP17 was increased in shoot tissue in P-efficient cultivars compared to root tissue and P-inefficient cultivars in response to low P stress.Moreover,the haplotype of BnPAP17^(Hap3)was detected for the selective breeding of P efficiency in oilseed rape.Over-expression of the BnPAP17^(Hap3)could promote the shoot and root growth with enhanced tolerance to low P stress and organic phosphorus(Po)utilization in oilseed rape.Collectively,these findings increase our understanding of the mechanisms underlying BnPAP17-mediated low P stress tolerance in oilseed rape.
文摘Objective:To provide new insights for the evaluation and diagnosis of chronic neck pain(CNP).Methods:22 patients with CNP and 22 healthy individuals were recruited from South China Normal University,who were all college students.The subjects'neck extensor muscle strength in the head neutral position,the natural anteversion position,and the maximum forward flexion position were measured by an isometric muscle strength tester respectively.The neck extensor strength of CNP patients and healthy subjects were compared.Results:In the neutral position,the maximum isometric muscle strength of neck extensor muscles was 12.31 kg for CNP patients and 15.16 kg for healthy individuals,resulting in a ratio of 81%strength in patients compared to healthy subjects.This difference was highly significant(P<0.000).In the natural anteversion position,the respective values were 12.6 kg for CNP patients and 15.05 kg for healthy individuals,with a ratio of 83%,and a significant difference between groups(P<0.001).In the maximum forward flexion position of the head,the values were 13.36 kg for CNP patients and 16.15 kg for healthy individuals,with a ratio of 82%,and a highly significant difference(P<0.000).Conclusion:The neck extensor muscle strength levels in college students with CNP were significantly lower compared to healthy college students across all measured positions.
