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Molecular Cancer

Lu Cao, Cong Xu, Guomin Xiang, Fang Liu, Xiaozhen Liu, Congying Li, Jing Liu, Qingxiang Meng, Jiao Jiao, Yun Niu
BACKGROUND: Androgen receptor (AR) is expressed in 60%~ 70% oestrogen receptor (ER)-negative breast cancer (BC) cases and promotes the growth of this cancer subtype. Expression of prostate-derived Ets factor (PDEF), a transcription factor, is highly restricted to epithelial cells in hormone-regulated tissues. MYC and its negative regulator MAD1 play an important role in BC progression. Previously, we found that PDEF expression is strongly correlated with AR expression. However, the relationship between AR and PDEF and the function of PDEF in ER-negative BC proliferation are unclear...
September 14, 2018: Molecular Cancer
Fuqing Hu, Haijie Li, Lu Liu, Feng Xu, Senyan Lai, Xuelai Luo, Junbo Hu, Xi Yang
After the publication of this work [1] an error was noticed in Fig. 7e, in which the incorrect information is shown. The updated figure included in this correction now shows the quantification of tumor microvessel density. This correction does not affect the findings or conclusions of the article. Nevertheless, we apologize for the inconvenience.
September 13, 2018: Molecular Cancer
Xiaodong Zhang, Haiying Zhao, Yan Li, Di Xia, Liang Yang, Yingbo Ma, Hangyu Li
In contrast to normal cells, which use the aerobic oxidation of glucose as their main energy production method, cancer cells prefer to use anaerobic glycolysis to maintain their growth and survival, even under normoxic conditions. Such tumor cell metabolic reprogramming is regulated by factors such as hypoxia and the tumor microenvironment. In addition, dysregulation of certain signaling pathways also contributes to cancer metabolic reprogramming. Among them, the Hippo signaling pathway is a highly conserved tumor suppressor pathway...
September 3, 2018: Molecular Cancer
Thomas Simon, Sotiria Pinioti, Pascale Schellenberger, Vinothini Rajeeve, Franz Wendler, Pedro R Cutillas, Alice King, Justin Stebbing, Georgios Giamas
Glioblastoma (GBM) is the most aggressive type of primary brain tumours. Anti-angiogenic therapies (AAT), such as bevacizumab, have been developed to target the tumour blood supply. However, GBM presents mechanisms of escape from AAT activity, including a speculated direct effect of AAT on GBM cells. Furthermore, bevacizumab can alter the intercellular communication of GBM cells with their direct microenvironment. Extracellular vesicles (EVs) have been recently described as main acts in the GBM microenvironment, allowing tumour and stromal cells to exchange genetic and proteomic material...
August 31, 2018: Molecular Cancer
Chi-Keung Cheng, Terry H Y Wong, Thomas S K Wan, Angela Z Wang, Natalie P H Chan, Nelson C N Chan, Chi-Kong Li, Margaret H L Ng
RUNX1 encodes a Runt-related transcription factor that is critical for hematopoiesis. In this study, through a combinatorial molecular approach, we characterized a novel t(5;21)(q13;q22) translocation involving RUNX1 that was acquired during the progression of myelodysplastic syndrome to acute myeloid leukemia (AML) in a pediatric patient. We found that this translocation did not generate RUNX1 fusion but aberrantly upregulated RUNX1. This upregulation was attributed to the disruption of long-range chromatin interactions between the RUNX1 P2 promoter and a silencer in the first intron of the gene...
August 29, 2018: Molecular Cancer
Chengwu Zeng, Sichu Liu, Shuai Lu, Xibao Yu, Jing Lai, Yifan Wu, Shaohua Chen, Liang Wang, Zhi Yu, Gengxin Luo, Yangqiu Li
Chronic myeloid leukemia (CML) is a clonal disease characterized by the presence of the constitutively active tyrosine kinase BCR-ABL oncoprotein. Although BCR-ABL is crucially important for pathogenesis and treatment response, it is thought that some additional factors might be involved in the regulation of these processes. Aberrant expression of long noncoding RNAs (lncRNAs) has recently been identified to be involved in various diseases including cancer, suggesting that lncRNAs may play a role in BCR-ABL-mediated CML...
August 28, 2018: Molecular Cancer
Qiaomei Guo, Junlei Wang, Jianfeng Xiao, Lin Wang, Xiaomeng Hu, Wenjun Yu, Gang Song, Jiatao Lou, JianFeng Chen
Liquid biopsy by genotyping circulating tumor DNA (ctDNA) has provided a non-invasive approach in assessing tumor genomic alterations in clinical oncology. However, emerging evidence in clinical settings has shown significant discordance in the genomic alterations between matched tumor tissue and blood ctDNA samples, and even between the same set of blood samples analyzed on different testing platforms. Thus, it is necessary to study underlying causes of discrepancies in these studies by genotyping tumor tissue and ctDNA in parallel using next generation sequencing (NGS) panels based on the same technology...
August 28, 2018: Molecular Cancer
Liang Wang, Ying Li, Xin Guan, Jingyuan Zhao, Liming Shen, Jing Liu
Pheochromocytomas (PCCs) and paragangliomas (PGLs) are the most heritable endocrine tumors. Genetic testing for 12 driver susceptibility genes is recommended in all PCC and PGL cases. However, detection of somatic mutations in PCC and PGL remains unrealizable for genetic diagnosis and preoperative assessment. We compared the serum exosomal DNA and tumor tissue DNA from patients or mice with PCC or PGL and found double-stranded DNA (dsDNA) fragments in the circulating exosomes of patients with PCC or PGL. Exosomal dsDNA shared the same mutations in the susceptibility genes with that of the parent tumor cells...
August 23, 2018: Molecular Cancer
Ming Yi, Dechao Jiao, Hanxiao Xu, Qian Liu, Weiheng Zhao, Xinwei Han, Kongming Wu
Programmed cell death protein 1/programmed cell death ligand 1 (PD-1/PD-L1) is a negative modulatory signaling pathway for activation of T cell. It is acknowledged that PD-1/PD-L1 axis plays a crucial role in the progression of tumor by altering status of immune surveillance. As one of the most promising immune therapy strategies, PD-1/PD-L1 inhibitor is a breakthrough for the therapy of some refractory tumors. However, response rate of PD-1/PD-L1 inhibitors in overall patients is unsatisfactory, which limits the application in clinical practice...
August 23, 2018: Molecular Cancer
Lin-Yu Sun, Xiao-Juan Li, Yu-Meng Sun, Wei Huang, Ke Fang, Cai Han, Zhen-Hua Chen, Xue-Qun Luo, Yue-Qin Chen, Wen-Tao Wang
The long noncoding RNA ANRIL has been found to be abnormally expressed and play important roles in different cancers. However, the expression and function of ANRIL in acute myeloid leukemia (AML) remain to be declared. In this study, we found that ANRIL is up-regulated in AML patients at diagnosis and down-regulated in patients after complete remission (CR). Functional studies showed that knockdown of ANRIL expression resulted in a decline in glucose uptake and inhibition of AML cell maintenance in vitro and in vivo...
August 22, 2018: Molecular Cancer
Xian-Zi Yang, Tian-Tian Cheng, Qing-Jun He, Zi-Ying Lei, Jun Chi, Zhen Tang, Quan-Xing Liao, Hong Zhang, Li-Si Zeng, Shu-Zhong Cui
BACKGROUND: Gastric cancer (GC) is a common malignancy and frequent cause of cancer-related death. Long non-coding RNAs (lncRNAs) have emerged as important regulators and tissue-specific biomarkers of multiple cancers, including GC. Recent evidence has indicated that the novel lncRNA LINC01133 plays an important role in cancer progression and metastasis. However, its function and molecular mechanism in GC remain largely unknown. METHODS: LINC01133 expression was detected in 200 GC and matched non-cancerous tissues by quantitative reverse transcription PCR...
August 22, 2018: Molecular Cancer
Weimin Zhang, Ruoxi Hong, Lin Li, Yan Wang, Peina Du, Yunwei Ou, Zitong Zhao, Xuefeng Liu, Wenchang Xiao, Dezuo Dong, Qingnan Wu, Jie Chen, Yongmei Song, Qimin Zhan
BACKGROUND: The prognosis for esophageal squamous cell carcinoma (ESCC) patients with lymph node metastasis (LNM) is still dismal. Elucidation of the LNM associated genomic alteration and underlying molecular mechanisms may provide clinical therapeutic strategies for ESCC treatment. METHODS: Joint analysis of ESCC sequencing data were conducted to comprehensively survey SCNAs and identify driver genes which significantly associated with LNM. The roles of miR-548k in lymphangiogensis and lymphatic metastasis were validated both in vitro and in vivo...
August 21, 2018: Molecular Cancer
Khalid Amine Timani, Balázs Győrffy, Ying Liu, Khalid S Mohammad, Johnny J He
Tip110, an important regulator of several oncogenic proteins, was significantly downregulated in human metastatic melanoma cells exposed to a hypoxic condition. Therefore, in this study, we set to determine whether differential expression of Tip110 could be an important indicator for melanoma tumorigenesis and metastasis. We found that in melanoma, but not in other cancer types, Tip110 knockdown enhanced significant expression and secretion of IL-8 and melanoma cells invasions. This induction was further potentiated under hypoxia and by inflammatory cytokine and found independent of TNF-α autocrine signaling...
August 17, 2018: Molecular Cancer
Virgínea de Araujo Farias, Francisco O'Valle, Santiago Serrano-Saenz, Per Anderson, Eduardo Andrés, Jesús López-Peñalver, Isabel Tovar, Ana Nieto, Ana Santos, Francisco Martín, José Expósito, F Javier Oliver, José Mariano Ruiz de Almodóvar
BACKGROUND: We have recently shown that radiotherapy may not only be a successful local and regional treatment but, when combined with MSCs, may also be a novel systemic cancer therapy. This study aimed to investigate the role of exosomes derived from irradiated MSCs in the delay of tumor growth and metastasis after treatment with MSC + radiotherapy (RT). METHODS: We have measured tumor growth and metastasis formation, of subcutaneous human melanoma A375 xenografts on NOD/SCID-gamma mice, and the response of tumors to treatment with radiotherapy (2 Gy), mesenchymal cells (MSC), mesenchymal cells plus radiotherapy, and without any treatment...
August 15, 2018: Molecular Cancer
Xianglun Cui, Jianxun Wang, Zongjun Guo, Mengyang Li, Mingyu Li, Si Liu, Haoran Liu, Wenjing Li, Xunhua Yin, Jiaping Tao, Wenhua Xu
As a novel class of endogenous RNAs, circRNAs, have a covalently closed continuous loop, with neither a 5'to 3'polarity, nor a polyadenylated tail. Numerous circRNAs have been characterized by abundance, stabilization, conservation, and exhibit tissue/developmental stage-specific expression. Furthermore, circRNAs play vital roles in tumorigenesis and metastasis, such as functioning as a ceRNA or miRNA sponge, interacting with protein and encoding protein. Increasing evidence has revealed that it potentially serves as a required novel biomarker for cancer diagnosis...
August 15, 2018: Molecular Cancer
Jie Cao, Jianchang Wei, Ping Yang, Tong Zhang, Zhuanpeng Chen, Feng He, Fang Wei, Huacui Chen, He Hu, Junbin Zhong, Zhi Yang, Wensong Cai, Wanglin Li, Qiang Wang
Genome-scale CRISPR-Cas9 Knockout Screening was applied to investigate novel targets in imatinib-resistant gastrointestinal stromal tumor (GIST). 20 genes and 2 miRNAs have been selected by total reads of sgRNA and sgRNA diversity, which has been further validated in imatinib-resistant GIST cells by CCK8 and qPCR analysis. Our study has finally revealed 9 genes (DBP, NR3C1, TCF12, TP53, ZNF12, SOCS6, ZFP36, ACYP1, and DRD1) involved in imatinib-resistant GIST-T1 cells. TP53 and SOCS6 may be the most promising candidate genes for imatinib-resistance due to the possible signaling pathway, such as apoptosis pathway and Wnt signaling pathway, JAK-STAT signaling pathway...
August 13, 2018: Molecular Cancer
Chuchu Shao, Fengming Yang, Suyu Miao, Weitao Liu, Chaoshan Wang, Yongqian Shu, Hua Shen
PURPOSE: Hypoxia is a major regulator of angiogenesis and always influences the release of exosomes in various types of tumors. The present review aimed to assess the role of hypoxia-induced exosomes in the tumor biology. METHODS: The relevant publications were retrieved from PubMed using keywords such as hypoxia, exosome, extracellular vesicles, tumor, cancer, and other similar terms. RESULTS: Recent studies have shown that cancer cells produce more exosomes under hypoxic conditions than do parental cells under normoxic conditions...
August 11, 2018: Molecular Cancer
Haihai Liang, Tong Yu, Yue Han, Hua Jiang, Chengyu Wang, Tianyi You, Xiaoguang Zhao, Huitong Shan, Rui Yang, Lida Yang, Hongli Shan, Yunyan Gu
BACKGROUND: Ovarian cancer (OvCa) is one of the most common malignant diseases of the female reproductive system in the world. The majority of OvCa is diagnosed with metastasis in the abdominal cavity. Epithelial-to-mesenchymal transition (EMT) plays a key role in tumor cell metastasis. However, it is still unclear whether long non-coding RNA (lncRNA) is implicated in EMT and influences cell invasion and metastasis in OvCa. RESULTS: In this study, using bioinformatcis analysis, we constructed a lncRNA-mediated competing endogenous RNA (ceRNA) network for mesenchymal OvCa and identified lncRNA AP000695...
August 11, 2018: Molecular Cancer
Tianyou Liu, Zhiyang Han, Huanyu Li, Yuekun Zhu, Ziquan Sun, Anlong Zhu
BACKGROUND: Accumulating evidences show that long noncoding RNAs (lncRNA) play essential roles in the development and progression of various malignancies. However, their functions remains poorly understood and many lncRNAs have not been defined in colorectal cancer (CRC). In this study, we investigated the role of DLEU1 in CRC. METHODS: Quantitative real-time PCR was used to detect the expression of DLEU1 and survival analysis was adopted to explore the association between DLEU1 expression and the prognosis of CRC patients...
August 11, 2018: Molecular Cancer
Natalia Pstrąg, Katarzyna Ziemnicka, Hans Bluyssen, Joanna Wesoły
In recent years, thyroid malignances have become more prevalent, especially among women. The most common sporadic types of thyroid tumors of follicular origin include papillary, follicular and anaplastic thyroid carcinomas. Although modern diagnosis methods enable the identification of tumors of small diameter, tumor subtype differentiation, which is imperative for the correct choice of treatment, is still troublesome. This review discusses the recent advances in the field of molecular marker identification via next-generation sequencing and microarrays...
August 8, 2018: Molecular Cancer
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