目的通过观察香连片对DKK-1 m RNA、β-catenin和PCNA蛋白表达的影响,初步明确香连片预防小鼠溃疡性结肠炎癌变的作用机制。方法 48只BALB/C小鼠随机分为空白组、模型组、香连片用药组和柳氮磺胺嘧啶组,采用DMH/DSS复合法诱导小鼠溃疡...目的通过观察香连片对DKK-1 m RNA、β-catenin和PCNA蛋白表达的影响,初步明确香连片预防小鼠溃疡性结肠炎癌变的作用机制。方法 48只BALB/C小鼠随机分为空白组、模型组、香连片用药组和柳氮磺胺嘧啶组,采用DMH/DSS复合法诱导小鼠溃疡性结肠炎癌变模型,造模时间为18周,用药时间为11周。Real-time PCR检测DKK-1基因的表达,SABC免疫组织化学法检测β-catenin和PCNA蛋白的表达。结果 Real-time PCR检测结果表明香连片可以上调DKK-1 m RNA的表达,与模型组比较,差异有统计学意义(P<0.05);免疫组织化学结果表明香连片可以下调β-catenin和PCNA蛋白的表达,与模型组比较,差异具有统计学意义(P<0.05)。结论香连片预防小鼠溃疡性结肠炎癌变的作用机制与上调DKK-1的表达,阻抑Wnt/β-catenin信号通路有一定的关系。展开更多
BACKGROUND Studies have shown that insulin-like growth factor 2 mRNA-binding protein 1(IGF2BP1)plays critical roles in the genesis and development of human cancers.AIM To investigate the clinical significance and role...BACKGROUND Studies have shown that insulin-like growth factor 2 mRNA-binding protein 1(IGF2BP1)plays critical roles in the genesis and development of human cancers.AIM To investigate the clinical significance and role of IGF2BP1 in pancreatic cancer.METHODS Expression levels of IGF2BP1 and microRNA-494(miR-494)were mined based on Gene Expression Omnibus datasets and validated in both clinical samples and cell lines by quantitative real-time polymerase chain reaction and Western blot.The relationship between IGF2BP1 expression and clinicopathological factors of pancreatic cancer patients was analyzed.The effect and mechanism of IGF2BP1 on pancreatic cancer cell proliferation were investigated in vitro and in vivo.Analyses were performed to explore underlying mechanisms of IGF2BP1 upregulation in pancreatic cancer and assays were carried out to verify the posttranscriptional regulation of IGF2BP1 by miR-494.RESULTS We found that IGF2BP1 was upregulated and associated with a poor prognosis in pancreatic cancer patients.We showed that downregulation of IGF2BP1 inhibited pancreatic cancer cell growth in vitro and in vivo via the AKT signaling pathway.Mechanistically,we showed that the frequent upregulation of IGF2BP1 was attributed to the downregulation of miR-494 expression in pancreatic cancer.Furthermore,we discovered that reexpression of miR-494 could partially abrogate the oncogenic role of IGF2BP1.CONCLUSION Our results revealed that upregulated IGF2BP1 promotes the proliferation of pancreatic cancer cells via the AKT signaling pathway and confirmed that the activation of IGF2BP1 is partly due to the silencing of miR-494.展开更多
目的探讨补肾活血方对多囊卵巢综合征伴不孕症患者卵巢颗粒细胞IGF-1R m RNA的影响。方法选取2010年3月—2014年3月静宁县人民医院诊治多囊卵巢综合征伴不孕症患者70例,随机分为观察组和对照组,每组各35例。对照组患者给予常规促排卵治...目的探讨补肾活血方对多囊卵巢综合征伴不孕症患者卵巢颗粒细胞IGF-1R m RNA的影响。方法选取2010年3月—2014年3月静宁县人民医院诊治多囊卵巢综合征伴不孕症患者70例,随机分为观察组和对照组,每组各35例。对照组患者给予常规促排卵治疗,观察组患者在对照组治疗的基础上给予补肾活血方治疗,疗程为6个月经周期。观察并记录两组患者在相应方法干预后血清雌二醇(E2)、睾酮(T)、黄体生成素/卵泡雌激素(LH/FSH)和中医症候积分的变化情况;测定取卵日卵巢颗粒细胞IGF-1R m RNA的表达情况。结果治疗前,两组患者的上述观察指标相比,差异无统计学意义(P>0.05);治疗后,两组患者的E2升高,T、LH/FSH和中医症候积分下降,其中观察组患者的改善程度优于对照组,差异有统计学意义(P<0.05);观察组患者卵巢颗粒细胞IGF-1R m RNA的表达显著高于对照组,差异有统计学意义(t=3.938,P=0.000)。结论对多囊卵巢综合征伴不孕症患者给予补肾活血方治疗,可以提高IGF-1R m RNA的表达水平,促进卵泡发育,调节机体的黄体功能,提高治疗效果,值得临床推广。展开更多
Root knot nematodes are top priority nematode pests that significantly constrain agricultural productivity globally especially in developing countries. However, expressing double stranded RNA (dsRNA) of essential nema...Root knot nematodes are top priority nematode pests that significantly constrain agricultural productivity globally especially in developing countries. However, expressing double stranded RNA (dsRNA) of essential nematode genes in susceptible plants is known to confer protection against these pests via RNA silencing. This molecular-based strategy is called host induced gene silencing (HIGS) and the selection of appropriate target nematode gene is critical to its success. In this study, therefore, we focused on root knot nematode PolA1, an essential single copy nuclear gene encoding the largest subunit of RNA polymerase I enzyme and evaluated its effectiveness as a target in conferring nematode resistance on Agrobacterium-mediated transformed tobacco plants. Transgenic tobacco expressing Meloidogyne incognita-specific (MiS) dsRNA of PolA1 gene showed significant reduction in nematode fecundity and multiplication compared to wild type plants in both T0 and T1 generations. T0 plants showed varying degrees of agronomic vigorover WT plants possibly due to varying levels of processed siRNA. However, production of MiS siRNAs in the transgenic plants coupled with significant reduction of PolA1 transcript expression in nematodes feeding on roots of transgenic plants provided evidence of HIGS. Taken together, our results show that PolA1 is a potentially effective target for HIGS-mediated reduction of root knot nematode damage on transgenic tobacco. Given the homology of our target sequence among Meloidogyne species, this protection could be broad range against other root knot nematodes aside M. incognita.展开更多
文摘目的通过观察香连片对DKK-1 m RNA、β-catenin和PCNA蛋白表达的影响,初步明确香连片预防小鼠溃疡性结肠炎癌变的作用机制。方法 48只BALB/C小鼠随机分为空白组、模型组、香连片用药组和柳氮磺胺嘧啶组,采用DMH/DSS复合法诱导小鼠溃疡性结肠炎癌变模型,造模时间为18周,用药时间为11周。Real-time PCR检测DKK-1基因的表达,SABC免疫组织化学法检测β-catenin和PCNA蛋白的表达。结果 Real-time PCR检测结果表明香连片可以上调DKK-1 m RNA的表达,与模型组比较,差异有统计学意义(P<0.05);免疫组织化学结果表明香连片可以下调β-catenin和PCNA蛋白的表达,与模型组比较,差异具有统计学意义(P<0.05)。结论香连片预防小鼠溃疡性结肠炎癌变的作用机制与上调DKK-1的表达,阻抑Wnt/β-catenin信号通路有一定的关系。
基金Supported by the National Natural Science Foundation of China,No.61802350
文摘BACKGROUND Studies have shown that insulin-like growth factor 2 mRNA-binding protein 1(IGF2BP1)plays critical roles in the genesis and development of human cancers.AIM To investigate the clinical significance and role of IGF2BP1 in pancreatic cancer.METHODS Expression levels of IGF2BP1 and microRNA-494(miR-494)were mined based on Gene Expression Omnibus datasets and validated in both clinical samples and cell lines by quantitative real-time polymerase chain reaction and Western blot.The relationship between IGF2BP1 expression and clinicopathological factors of pancreatic cancer patients was analyzed.The effect and mechanism of IGF2BP1 on pancreatic cancer cell proliferation were investigated in vitro and in vivo.Analyses were performed to explore underlying mechanisms of IGF2BP1 upregulation in pancreatic cancer and assays were carried out to verify the posttranscriptional regulation of IGF2BP1 by miR-494.RESULTS We found that IGF2BP1 was upregulated and associated with a poor prognosis in pancreatic cancer patients.We showed that downregulation of IGF2BP1 inhibited pancreatic cancer cell growth in vitro and in vivo via the AKT signaling pathway.Mechanistically,we showed that the frequent upregulation of IGF2BP1 was attributed to the downregulation of miR-494 expression in pancreatic cancer.Furthermore,we discovered that reexpression of miR-494 could partially abrogate the oncogenic role of IGF2BP1.CONCLUSION Our results revealed that upregulated IGF2BP1 promotes the proliferation of pancreatic cancer cells via the AKT signaling pathway and confirmed that the activation of IGF2BP1 is partly due to the silencing of miR-494.
文摘目的探讨补肾活血方对多囊卵巢综合征伴不孕症患者卵巢颗粒细胞IGF-1R m RNA的影响。方法选取2010年3月—2014年3月静宁县人民医院诊治多囊卵巢综合征伴不孕症患者70例,随机分为观察组和对照组,每组各35例。对照组患者给予常规促排卵治疗,观察组患者在对照组治疗的基础上给予补肾活血方治疗,疗程为6个月经周期。观察并记录两组患者在相应方法干预后血清雌二醇(E2)、睾酮(T)、黄体生成素/卵泡雌激素(LH/FSH)和中医症候积分的变化情况;测定取卵日卵巢颗粒细胞IGF-1R m RNA的表达情况。结果治疗前,两组患者的上述观察指标相比,差异无统计学意义(P>0.05);治疗后,两组患者的E2升高,T、LH/FSH和中医症候积分下降,其中观察组患者的改善程度优于对照组,差异有统计学意义(P<0.05);观察组患者卵巢颗粒细胞IGF-1R m RNA的表达显著高于对照组,差异有统计学意义(t=3.938,P=0.000)。结论对多囊卵巢综合征伴不孕症患者给予补肾活血方治疗,可以提高IGF-1R m RNA的表达水平,促进卵泡发育,调节机体的黄体功能,提高治疗效果,值得临床推广。
文摘Root knot nematodes are top priority nematode pests that significantly constrain agricultural productivity globally especially in developing countries. However, expressing double stranded RNA (dsRNA) of essential nematode genes in susceptible plants is known to confer protection against these pests via RNA silencing. This molecular-based strategy is called host induced gene silencing (HIGS) and the selection of appropriate target nematode gene is critical to its success. In this study, therefore, we focused on root knot nematode PolA1, an essential single copy nuclear gene encoding the largest subunit of RNA polymerase I enzyme and evaluated its effectiveness as a target in conferring nematode resistance on Agrobacterium-mediated transformed tobacco plants. Transgenic tobacco expressing Meloidogyne incognita-specific (MiS) dsRNA of PolA1 gene showed significant reduction in nematode fecundity and multiplication compared to wild type plants in both T0 and T1 generations. T0 plants showed varying degrees of agronomic vigorover WT plants possibly due to varying levels of processed siRNA. However, production of MiS siRNAs in the transgenic plants coupled with significant reduction of PolA1 transcript expression in nematodes feeding on roots of transgenic plants provided evidence of HIGS. Taken together, our results show that PolA1 is a potentially effective target for HIGS-mediated reduction of root knot nematode damage on transgenic tobacco. Given the homology of our target sequence among Meloidogyne species, this protection could be broad range against other root knot nematodes aside M. incognita.
基金This work was supported by the USTC Research Funds of the Double First-Class Initiative(YD9100002009,YD9100002037)the Fundamental Research Funds for the Central Universities(WK9100000016,WK9100000037).
