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https://www.readbyqxmd.com/read/28214211/expression-of-bmp-4-in-papillary-thyroid-carcinoma-and-its-correlation-with-tumor-invasion-and-progression
#1
Xiaomei Meng, Peng Zhu, Ning Li, Jinchen Hu, Shaoguang Wang, Shuguang Pang, Jiahui Wang
Bone morphogenetic protein 4 (BMP-4) is a member of the BMP protein family. BMP-4 was reported to induce epithelial-mesenchymal transition (EMT) and promote tumor cell immigration and invasion. This study aimed to investigate the expression of BMP-4 in papillary thyroid carcinoma (PTC) and its correlation with the patients' clinicophathological features and with tumor invasion and metastasis. Surgically resected PTC specimens from 82 patients admitted to the Department of Thyroid Surgery of Yantai Yuhuangding Hospital between Feb 1st and May 31st, 2016 were collected...
January 17, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/28207739/overexpression-of-notch-regulated-ankyrin-repeat-protein-is-associated-with-papillary-thyroid-carcinoma-progression
#2
Mingdi Zhang, Yiyu Qin, Bin Zuo, Wei Gong, Shenglai Zhang, Yurong Gong, Zhiwei Quan, Bingfeng Chu
Papillary thyroid cancer (PTC) is one of the endocrine cancers with high clinical and genetic heterogeneity. NOTCH signaling and its downstream NOTCH-Regulated Ankyrin Repeat Protein (NRARP) have been implicated in oncogenesis of many cancers, but the roles in PTCs are less studied. In this study, we show that NRARP is frequently over-expressed in thyroid carcinoma. The over-activation of NRARP is highly and positively correlated with NOTCH genes. Moreover, we find that the expression of NRARP is highly associated with several epithelial mesenchymal transition (EMT) markers and contributes to poor survival outcomes...
2017: PloS One
https://www.readbyqxmd.com/read/28137980/nelfinavir-inhibits-proliferation-and-induces-dna-damage-in-thyroid-cancer-cells
#3
Kirk Jensen, Athanasios D Bikas, Aneeta Patel, Yevgeniya Kushchayeva, John Costello, Dennis McDaniel, Kenneth Burman, Vasily Vasko
The HIV protease inhibitor Nelfinavir (NFV) inhibits PI3K/AKT and MAPK/ERK signaling pathways, emerging targets in thyroid cancers. We examined the effects of NFV on cancer cells that derived from follicular (FTC), papillary (PTC) and anaplastic (ATC) thyroid cancers. NFV (1-20 μM) was tested in FTC133, BCPAP and SW1736 cell lines. The effects of NFV on cell proliferation were determined in vitro using real-time microscopy and by flow cytometry. DNA damage, apoptotic cell death, and expression of molecular markers of epithelial-mesenchymal transition (EMT) were determined by Western blot and real-time PCR...
January 30, 2017: Endocrine-related Cancer
https://www.readbyqxmd.com/read/28113985/a-novel-approach-to-identify-the-mirna-mrna-causal-regulatory-modules-in-cancer
#4
Jiawei Luo, Wei Huang, Buwen Cao
MicroRNAs (miRNAs) play an essential role in many biological processes by regulating the target genes, especially in the initiation and development of cancers. Therefore, the identification of the miRNA-mRNA regulatory modules is important for understanding the regulatory mechanisms. Most computational methods only used statistical correlations in predicting miRNA-mRNA modules, and neglected the fact there are causal relationships between miRNAs and their target genes. In this paper, we propose a novel approach called CALM(the causal regulatory modules) to identify the miRNA-mRNA regulatory modules through integrating the causal interactions and statistical correlations between the miRNAs and their target genes...
September 21, 2016: IEEE/ACM Transactions on Computational Biology and Bioinformatics
https://www.readbyqxmd.com/read/28042956/n-cadherin-promotes-thyroid-tumorigenesis-through-modulating-major-signaling-pathways
#5
Chenxing Da, Kexia Wu, Chenli Yue, Peisong Bai, Rong Wang, Guanjie Wang, Man Zhao, Yanyan Lv, Peng Hou
Epithelial-mesenchymal transition (EMT), a crucial step in disease progression, plays a key role in tumor metastasis. N-cadherin, a well-known EMT marker, acts as a major oncogene in diverse cancers, whereas its functions in thyroid cancer remains largely unclear. This study was designed to explore the biological roles and related molecular mechanism of N-cadherin in thyroid tumorigenesis. Quantitative RT-PCR (qRT-PCR) and immunohistochemistry assays were used to evaluate N-cadherin expression. A series of in vitro studies such as cell proliferation, colony formation, cell cycle, apoptosis, migration and invasion assays were performed to determine the effect of N-cadherin on malignant behavior of thyroid cancer cells...
January 31, 2017: Oncotarget
https://www.readbyqxmd.com/read/28030816/down-regulation-of-14q32-encoded-mirnas-and-tumor-suppressor-role-for-mir-654-3p-in-papillary-thyroid-cancer
#6
Murilo Vieira Geraldo, Helder Imoto Nakaya, Edna Teruko Kimura
Papillary thyroid carcinoma (PTC) is the most prevalent malignant neoplasia of the thyroid gland. A fraction of PTC cases show loss of differentiation and aggressive behavior, with radioiodine therapy resistance and metastasis. Although microRNAs (miRNAs) emerged as promising molecular markers for PTC, their role in the loss of differentiation observed during PTC progression remains to be fully understood. We performed the large-scale analysis of miRNA expression during PTC progression in BRAFT1799A-transgenic animals (Tg-Braf) and thyroid cancer cell lines and identified the marked downregulation of several miRNAs from the region 14q32...
February 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28011713/germline-compound-heterozygous-poly-glutamine-deletion-in-usf3-may-be-involved-in-predisposition-to-heritable-and-sporadic-epithelial-thyroid-carcinoma
#7
Ying Ni, Spencer Seballos, Benjamin Fletcher, Todd Romigh, Lamis Yehia, Jessica Mester, Leigha Senter, Farshad Niazi, Motoyasu Saji, Matthew D Ringel, Thomas LaFramboise, Charis Eng
Cowden syndrome (CS) is an autosomal dominant disorder that predisposes to breast, thyroid, and other epithelial cancers. Differentiated thyroid carcinoma (DTC), as one of the major component cancers of CS, is the fastest rising incident cancer in the USA, and the most familial of all solid tumours. To identify additional candidate genes of CS and potentially DTC, we analysed a multi-generation CS-like family with papillary thyroid cancer (PTC), applying a combined linkage-based and whole-genome sequencing strategy and identified an in-frame germline compound heterozygous deletion, p...
December 22, 2016: Human Molecular Genetics
https://www.readbyqxmd.com/read/27983916/silencing-of-a-kinase-anchor-protein-4-akap4-inhibits-proliferation-and-progression-of-thyroid-cancer
#8
Jiakai Han, Wei Gao, Dongyue Su, Yang Liu
A-kinase anchor protein 4 (AKAP4), a member of the A-kinase anchor proteins, plays a role in tumor development and progression. However, its expression pattern and function in human thyroid cancer remain obscure. Here, we examined AKAP4 expression in thyroid cancer cell lines. Additionally, the effects of AKAP4 on the proliferation and metastasis of thyroid cancer cells was examined. Finally, we explored the molecular mechanism by which AKAP4 mediates the metastatic potential of thyroid cancer cells. Our results revealed that the transcript and protein levels of AKAP4 were significantly up-regulated in thyroid cancer cell lines...
November 8, 2016: Oncology Research
https://www.readbyqxmd.com/read/27966519/combretastatin-a4-regulates-proliferation-migration-invasion-and-apoptosis-of-thyroid-cancer-cells-via-pi3k-akt-signaling-pathway
#9
Weixin Liang, Yongqiang Lai, Mingzhang Zhu, Shangshu Huang, Weizhao Feng, Xiaoyu Gu
BACKGROUND Combretastatin A4 (CA4) is a potential therapeutic candidate for a variety of human cancer treatments. However, the inhibitive effects of CA4 on thyroid cancer cells are still not well-clarified. This study aimed to investigate the potential effect of CA4 on thyroid cancer cells, as well as underlying mechanism. MATERIAL AND METHODS Human thyroid papillary carcinoma cell line TPC1 was pre-treated with 5 concentrations of CA4 (0, 1, 2, 5, or 10 μM) for 2 h. Cell proliferation was determined by 3-(4, 5-dimethyl-2- thiazolyl)-2, 5-diphenyl -2-H-tetrazolium bromide (MTT) assay...
December 14, 2016: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/27880942/acquired-resistance-to-braf-inhibition-induces-epithelial-to-mesenchymal-transition-in-braf-v600e-mutant-thyroid-cancer-by-c-met-mediated-akt-activation
#10
Hyung Kwon Byeon, Hwi Jung Na, Yeon Ju Yang, Sooah Ko, Sun Och Yoon, Minhee Ku, Jaemoon Yang, Jae Wook Kim, Myung Jin Ban, Ji-Hoon Kim, Da Hee Kim, Jung Min Kim, Eun Chang Choi, Chang-Hoon Kim, Joo-Heon Yoon, Yoon Woo Koh
Previously, the authors have identified that c-Met mediates reactivation of the PI3K/AKT pathway following BRAF inhibitor treatment in BRAF (V600E) mutant anaplastic thyroid cancer, thereby contributing to the acquired drug resistance. Therefore dual inhibition of BRAF and c-Met led to sustained treatment response, thereby maximizing the specific anti-tumor effect of targeted therapy. The present study goes one step further and aims to investigate the effect of acquired resistance of BRAF inhibitor on epithelial-to-mesenchymal transition (EMT) in BRAF mutant thyroid cancer cells and the effect of dual inhibition from combinatorial therapy...
January 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/27829234/a-regulatory-loop-involving-mir-29c-and-sp1-elevates-the-tgf-%C3%AE-1-mediated-epithelial-to-mesenchymal-transition-in-lung-cancer
#11
Hai-Wei Zhang, En-Wen Wang, Li-Xian Li, Shou-Hui Yi, Lu-Chun Li, Fa-Liang Xu, Dong-Lin Wang, Yong-Zhong Wu, Wei-Qi Nian
Specificity protein1 (Sp1) is required for TGF-β-induced epithelial-to-mesenchymal transition (EMT) which has been demonstrated to aggravate the progression of cancer including lung cancer. microRNA-29c (miR-29c) is identified to inhibit EMT, but the correlation between miR-29c and Sp1 in human lung cancer remain incompletely clarified. Here, we confirmed decreased expression of miR-29c and enhanced expression of Sp1 in lung cancer tissues (n = 20) and found that Sp1 could be targeted and inhibited by miR-29c...
November 5, 2016: Oncotarget
https://www.readbyqxmd.com/read/27712597/knockdown-of-latent-transforming-growth-factor-tgf-beta-binding-protein-2-ltbp2-inhibits-invasion-and-tumorigenesis-in-thyroid-carcinoma-cells
#12
Fuqiang Wan, Li Peng, ChaoYu Zhu, XinFa Zhang, FangWen Chen, Tao Liu
Latent transforming growth factor (TGF) beta-binding protein 2 (LTBP2) is one of four proteins in the LTBP family of proteins (LTBP-1-4) and was shown to play a vital role in tumorigenesis. However, little is known regarding the functional role of LTBP2 in thyroid carcinoma. Therefore, the current study aimed to evaluate the effect of LTBP2 expression on the proliferation, invasion, and tumorigenesis in thyroid carcinoma cells, and to explore the molecular mechanism of LTBP2 in tumor progression. Our results showed that the expression of LTBP2 is upregulated in human thyroid carcinoma and cell lines...
October 5, 2016: Oncology Research
https://www.readbyqxmd.com/read/27696303/malat1-long-non-coding-rna-expression-in-thyroid-tissues-analysis-by-in-situ-hybridization-and-real-time-pcr
#13
Ranran Zhang, Heather Hardin, Wei Huang, Jidong Chen, Sofia Asioli, Alberto Righi, Francesca Maletta, Anna Sapino, Ricardo V Lloyd
Long non-coding RNAs (lncRNAs) are important for transcription and for epigenetic or posttranscriptional regulation of gene expression and may contribute to carcinogenesis. Metastasis-associated lung adenocarcinoma transcript 1 (MALAT1), an lncRNA involved in the regulation of the cell cycle, cell proliferation, and cell migration, is known to be deregulated in multiple cancers. Here, we analyzed the expression of MALAT1 on 195 cases of benign and malignant thyroid neoplasms by using tissue microarrays for RNA in situ hybridization (ISH) and real-time PCR...
March 2017: Endocrine Pathology
https://www.readbyqxmd.com/read/27683118/induction-of-epithelial-mesenchymal-transition-emt-by-beclin-1-knockdown-via-posttranscriptional-upregulation-of-zeb1-in-thyroid-cancer-cells
#14
Si Li, Hai-Yan Zhang, Zhen-Xian Du, Chao Li, Ming-Xin An, Zhi-Hong Zong, Bao-Qin Liu, Hua-Qin Wang
Beclin 1 has emerged as a haploinsufficient tumor suppression gene in a variety of human carcinomas. In order to clarify the role of Beclin 1 in thyroid cancer, Beclin 1 was knockdown in thyroid cancer cell lines. The current study demonstrated that knockdown of Beclin 1 resulted in morphological and molecular changes of thyroid cancer cells consistent with epithelial-mesenchymal transition (EMT), a morphogenetic procedure during which cells lose their epithelial characteristics and acquire mesenchymal properties concomitantly with gene expression reprogramming...
September 23, 2016: Oncotarget
https://www.readbyqxmd.com/read/27662682/a-novel-approach-to-identify-the-mirna-mrna-causal-regulatory-modules-in-cancer
#15
Jiawei Luo, Wei Huang, Buwen Cao
MicroRNAs (miRNAs) play an essential role in many biological processes by regulating the target genes, especially in the initiation and development of cancers. Therefore, the identification of the miRNA-mRNA regulatory modules is important for understanding the regulatory mechanisms. Most computational methods only used statistical correlations in predicting miRNA-mRNA modules, and neglected the fact there are causal relationships between miRNAs and their target genes. In this paper, we propose a novel approach called CALM(the causal regulatory modules) to identify the miRNA-mRNA regulatory modules through integrating the causal interactions and statistical correlations between the miRNAs and their target genes...
September 21, 2016: IEEE/ACM Transactions on Computational Biology and Bioinformatics
https://www.readbyqxmd.com/read/27648147/poly-r-c-binding-protein-pcbp-1-is-a-negative-regulator-of-thyroid-carcinoma
#16
Mingpeng Zhang, Xin Wang, Jin Tan, Minghui Zhao, Linjuan Lian, Weisan Zhang
Poly r(C) binding protein (PCBP) 1 or heterogeneous ribonucleoprotein (hnRNP) E1 is a RNA binding protein functional in multiple biological processes. PCBP1 has been shown to function as a tumor suppressor by negatively regulating translation of EMT inducer proteins in different cancers. Loss of PCBP1 expression or its Akt2-mediated phosphorylation at serine residue 43 has both been indicated to de-repress its regulation of EMT inducer proteins. However, its role in thyroid carcinoma has not been elucidated...
2016: American Journal of Translational Research
https://www.readbyqxmd.com/read/27586674/the-role-of-notch1-signaling-in-anaplastic-thyroid-carcinoma
#17
Hyeon Jin Kim, Min-Jung Kim, Areumnuri Kim, Chang Won Jung, Sunhoo Park, Jae Soo Koh, Jae Kyung Myung
Purpose: The Notch signaling pathway is widely expressed in normal, reactive, and neoplastic tissues; however, its role in thyroid tissues has not been fully elucidated. Therefore, this study was conducted to characterize the expression of the Notch signaling pathway in papillary thyroid cancer (PTC) cells and anaplastic thyroid cancer (ATC) cells. Materials and Methods: Expression of activated Notch1 in ATC and PTC paraffin-embedded tissues was determined by immunohistochemistry...
September 1, 2016: Cancer Research and Treatment: Official Journal of Korean Cancer Association
https://www.readbyqxmd.com/read/27487122/interleukin-11-promotes-epithelial-mesenchymal-transition-in-anaplastic-thyroid-carcinoma-cells-through-pi3k-akt-gsk3%C3%AE-signaling-pathway-activation
#18
Zhaoming Zhong, Zedong Hu, Yue Jiang, Ruimei Sun, Xue Chen, Hongying Chu, Musheng Zeng, Chuanzheng Sun
Metastasis is the major cause of treatment failure in anaplastic thyroid carcinoma (ATC) patients. In the preliminary study, we demonstrated that interleukin (IL)-11 expression is positively correlated with distant metastasis in ATC. However, the mechanisms underlying remain largely unknown. Here, we found that cobalt chloride (a hypoxia mimetic) promoted IL-11 expression via HIF-1α activation. Furthermore, the resultant increase in IL-11 expression significantly induced epithelial-mesenchymal transition (EMT) in ATC cells, accompanied by Akt/GSK3β pathway activation and increased invasive and migratory abilities...
September 13, 2016: Oncotarget
https://www.readbyqxmd.com/read/27384483/%C3%AE-catenin-signaling-is-required-for-ras-driven-thyroid-cancer-through-pi3k-activation
#19
Ana Sastre-Perona, Garcilaso Riesco-Eizaguirre, Miguel A Zaballos, Pilar Santisteban
Mutations in β-catenin are traditionally described as late events in thyroid cancer progression. However, the functional implications of β-catenin dysregulation in the context of tumor initiating events remain unclear. The aim of this work was to investigate whether the two main oncogenic drivers in thyroid cancer, RAS and BRAF, could activate the Wnt/β-catenin pathway. Expression of HRASV12 but not BRAFV600E in thyroid cells induced β-catenin nuclear localization, increased β-catenin-dependent transcriptional activity and inhibited GSK3β...
August 2, 2016: Oncotarget
https://www.readbyqxmd.com/read/27375021/cadherin-6-promotes-emt-and-cancer-metastasis-by-restraining-autophagy
#20
M Gugnoni, V Sancisi, G Gandolfi, G Manzotti, M Ragazzi, D Giordano, I Tamagnini, M Tigano, A Frasoldati, S Piana, A Ciarrocchi
The transdifferentiation of epithelial cells toward a mesenchymal condition (EMT) is a complex process that allows tumor cells to migrate to ectopic sites. Cadherins are not just structural proteins, but they act as sensors of the surrounding microenvironment and as signaling centers for cellular pathways. However, the molecular mechanisms underlying these signaling functions remain poorly characterized. Cadherin-6 (CDH6) is a type 2 cadherin, which drives EMT during embryonic development and it is aberrantly re-activated in cancer...
July 4, 2016: Oncogene
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