Zinc finger of the cerebellum 5 promotes colorectal cancer cell proliferation and cell cycle progression through enhanced CDK1/CDC25c signaling

IntroductionColorectal cancer (CRC), mostly caused by external or environmental factors, is the third most common and lethal cancer worldwide. Although a large number of investigations have been carried out to reveal the evolution of CRC, the underlying mechanisms of CRC remain unclear.Material and methodsExpression of zinc finger of the cerebellum 5 (ZIC5) in CRC tissues and cell models was measured by qRT-PCR and IHC. Cell transfection was carried out for ZIC5 overexpression or knockdown. The MTT assay was applied to examine the capacity of glioma cell proliferation. Wound healing assay and tumor invasion assay were used to test the capacity of glioma cell migration and invasion respectively. Cell cycle analysis and western blot were used to verify the apoptosis rates of CRC cells upon ZIC5 overexpression or downregulation. A further tumor Xenograft study was used to examine the effects of ZIC5 on tumor malignancy in vivo.ResultsCell models using HCT116 and SW620 cells were established to study the ZIC5 function upon ZIC5 overexpression of knockdown. Consistently, we discovered that ZIC5 also significantly increased in Chinese CRC patients. In addition, ZIC5 promoted CRC cell proliferation through increasing the proportion of cells maintained in the S phase. ZIC5 overexpression facilitated the capacity of CRC cell migration and invasion. Inhibition of ZIC5 mitigated such malignant effects.ConclusionsCollectively, investigations of the ZIC5 in CRC provided a new insight into CRC diagnosis, treatment, prognosis and next-step translational therapeutic developments from bench to clinic.     

转化生长因子-1和基质金属蛋白酶抑制因子-1在肝硬化组织中的表达及其临床意义

目的了解转化生长因子-1（TGFβ1）和基质金属蛋白酶组织抑制因子-1（TIMP1）在肝硬化组织中的表达和分布状态。方法采用免疫组化法（S—P）。检测10例对照肝组织,57例肝硬化患者肝组织中TGFβ1、TIMP1的表达。结果57例肝硬化患者肝组织中TGFβ1、TIMP1蛋白表达的阳性率分别为90．38％、100％,而正常肝组织未见阳性表达,差异有统计学意义（P〈0．01）。TGFβ1、TIMP1表达的阳性信号均位于肝细胞胞浆中,细胞核中无表达。结论（1）肝硬化患者肝细胞中存在TGFβ1、TIMP1的表达,其表达强度与肝组织病理改变相关。提示TGFβ1与TIMP1的表达与肝纤维化活动状态密切相关,在肝纤维化的形成和发展中具有重要意义。（2）检测TGFβ1、TIMP1的表达可对肝硬化病变从分子水平进行评估,也可作为早期诊断及临床治疗和判断预后的分子病理学指标。     

妊娠期糖尿病患者血清脂联素和内脂素水平与并发子痫前期的相关性

目的 观察妊娠期糖尿病患者血清脂联素、内脂素表达情况,探讨其与妊娠期糖尿病患者发生子痫前期的关系.方法 已分娩的369例妊娠期糖尿病患者为妊娠期糖尿病组,已分娩的363例健康孕妇为对照组,检测2组血清脂联素、内脂素水平.妊娠期糖尿病组根据是否并发子痫前期分为子痫前期组34例和无子痫前期组335例,比较2组血清脂联素、内...