[Retracted] Pin2/TRF1­binding protein X1 inhibits colorectal cancer cell migration and invasion in vitro and metastasis in vivo via the nuclear factor­κB signaling pathway.

Following the publication of the above article, an interested reader drew to the authors' attention that Figs. 3C and E in the paper appeared to contain instances of duplicated data. The authors were able to consult their original data files, and realized that these figures had indeed been assembled incorrectly; subsequently, they requested that a corrigendum be published to take account of the errors that were made during the compilation of these figures. Having investigated this matter in the Editorial Office, however, additional panels of overlapping data were identified, comparing between Figs. 3 and 5; specifically, overlapping data panels were also identified in panels in Figs. 3C, E and F, and 5C and D. The Editor of Oncology Reports has considered the authors' request to publish a corrigendum, but has decided to decline this request on account of the large number of errors that have been identified; rather, the article is to be be retracted from the Journal on the basis of an overall lack of confidence in the presented data. The Editor apologizes to the readership of the Journal for any inconvenience caused. [Oncology Reports 40: 1533­1544, 2018; DOI: 10.3892/or.2018.6570].

Pin2/TRF1­binding protein X1 inhibits colorectal cancer cell migration and invasion in vitro and metastasis in vivo via the nuclear factor­κB signaling pathway.

Pin2/TRF1­binding protein X1 (PinX1) functioned as a potent inhibitor of telomerase, which was also widely considered to be a sufficient tumor suppressor. Previous studies have demonstrated that PinX1 expression was reduced in several types of cancer and was associated with poor overall survival. However, little is known regarding the role of PinX1 in colorectal cancer (CRC). The present study investigated PinX1 expression via immunostaining of CRC tissue microarrays consisting of tumor and adjacent non­cancerous tissues (ANCT) from 568 patients. PinX1 expression was significantly lower in CRC tissues than in ANCT. Decreased PinX1 expression was revealed to be associated with lymph node metastasis, distant metastasis and advanced Tumor­Node­Metastasis stage, as well as a poorer overall and disease­free survival. Furthermore, Cox regression analysis determined that a decreased PinX1 expression was an independent prognostic marker for patients with CRC. In an in vitro assay, PinX1 markedly restricted CRC cell migration and invasion. Additionally, the present study revealed that PinX1 could hinder the activity of matrix metalloproteinase 2 (MMP2) through nuclear factor (NF)­κB­dependent transcription to further suppress the migration and invasion ability of CRC cells through western blot analysis and a gelatin zymography assay. In vivo studies verified that PinX1 could suppress CRC metastasis, as well as the expression of MMP2 and NF­κB p65. These results suggested that PinX1 can serve as an independent prognostic factor for patients with CRC and that it may function as a tumor metastasis suppressor in the progression of CRC though negatively regulating the NF­κB/MMP2 signaling pathway.

DKC1 serves as a potential prognostic biomarker for human clear cell renal cell carcinoma and promotes its proliferation, migration and invasion via the NF­κB pathway.

DKC1, an X­linked gene encoding dyskerin at Xq28, is a crucial component of the telomerase complex and is indispensable for normal telomere function and the post­-transcriptional modification of precursor rRNA. It has been revealed to exert diverse biological functions and prognostic values in numerous types of cancers. Our present study was aimed at examining DKC1 expression in normal renal tissues and clear cell renal cell carcinoma (ccRCC) samples and the prognostic value of DKC1 in ccRCC. We examined DKC1 protein expression levels in tissue microarrays including 307 cases of ccRCC tissues and in 75 pairs of ccRCC and paracancerous tissues with immunohistochemistry. The percentage of DKC1 expression in ccRCC (61.3%) was markedly higher than that in paracancerous tissues (34.7%) (P=0.001). Positive DKC1 expression tends to significantly be associated with unfavorable clinicopathological characteristics such as tumor diameter >7 cm (P=0.002) and tumor­node­metastasis (TNM) stage III or IV (P<0.001). Multivariate COX analysis revealed that positive DKC1 expression was an independent unfavorable factor for prognosis of ccRCC patients [hazard ratio (HR)=1.932, 95% CI, 1.290­2.893, P=0.001 for 5­year overall survival; HR=1.778, 95% CI,1.150­2.748, P=0.010 for disease­free survival]. In the PROGgeneV2 platform, we also found that ccRCC patients with high DKC1 mRNA expression had a poorer prognosis than patients with low DKC1 expression in The Cancer Genome Atlas (TCGA). Furthermore, we found that knockdown of DKC1 inhibited proliferation, migration and invasion of ccRCC through regulation of the NF­κB/MMP­2 signaling pathway in vitro. We also demonstrated that DKC1 regulated ccRCC proliferation and the expression of NF­κB­p65 and MMP­2 in vivo. In summary, the expression of DKC1 was upregulated in ccRCC, which was associated with unfavorable clinicopathological characteristics and DKC1 may act as an independent prognostic indicator of ccRCC patients.

Embedding ultrafine ZnSnO3 nanoparticles into reduced graphene oxide composites as high-performance electrodes for lithium ion batteries.

Ultrafine ZnSnO3 nanoparticles, with an average diameter of 45 nm, homogeneously grown on reduced graphene oxide (rGO) have been successfully fabricated via methods of low temperature coprecipitation, colloid electrostatic self-assembly, and hydrothermal treatment. The uniformly distributed ZnSnO3 nanocrystals could inhibit the restacking of rGO sheets. In turn, the existence of rGO could hinder the growth and aggregation of ZnSnO3 nanoparticles in the synthesis process, increase the conductivity of the composite, and buffer the volume expansion of the ZnSnO3 nanocrystals upon lithium ion insertion and extraction. The obtained ZnSnO3/rGO exhibited superior cycling stability with a discharge/charge capacity of 718/696 mA h g-1 after 100 cycles at a current density of 0.1 A g-1.

Involvement of EZH2 in aerobic glycolysis of prostate cancer through miR-181b/HK2 axis.

Recent studies suggest that several types of tumors preferentially metabolize glucose through aerobic glycolysis, a phenomenon known as the Warburg effect. However, it remains largely unexplored whether metabolic reprogramming is involved in prostate cancer (PCa) progression. In this study, we found that histone methyltransferase enhancer of zeste homolog 2 (EZH2) dysregulated in PCa development regulated cellular growth and aerobic glycolysis through miR-181b/hexokinase 2 (HK2) axis. Aberrant expression profiles of coding RNA and microRNA were examined by two large, independent clinical prostate cancer data sets. The results indicated that EZH2 expression was elevated followed by PCa development. A set of glycometabolism-related genes were positively correlated with EZH2 expression such as HK2.The depletion of EZH2 in cell experiments inhibited PCa cell growth and aerobic glycolysis accompanying the up-regulation of miR-181b. Western blot and luciferase reporter assays showed that miR-181b inversely modulated HK2 by directly targeting the binding site within 3'-untranslated regions. Moreover, decreased miR-181b expression largely abrogated the effect of sh-EZH2 on HK2 expression and HK2-induced glucose metabolism process. Immunohistochemistry (IHC) and in situ hybridisation (ISH) analysis further revealed a significant correlation in EZH2, miR-181b and HK2 expression in nude mouse tumor xenograft. Taken together, these findings provide the first evidence that EZH2/miR-181b/HK2 pathway plays a positive role in PCa development. Targeting this aberrantly activated pathway may provide a new therapeutic strategy against PCa.