Read by QxMD icon Read


Peng Guo, Xiangpeng Xiong, Sainan Zhang, Dongxian Peng
Epithelial ovarian cancer (EOC) is one of the malignant tumors that seriously affects women's health and chemotherapy resistance is an important reason for the poor prognosis. The present study was conducted to investigate whether microRNA-100 (miR-100) can be used to modulate the tolerance to cisplatin in EOC. Expression of miR-100 was compared between ovarian cancer cells tolerant and not tolerant to cisplatin. Mimic and antisense were used to study the roles and related mechanisms of miR-100 in cisplatin sensitivity in EOC...
October 3, 2016: Oncology Reports
W Bruinsma, M Aprelia, I García-Santisteban, J Kool, Y J Xu, R H Medema
When cells in G2 phase are challenged with DNA damage, several key mitotic regulators such as Cdk1/Cyclin B, Aurora A and Plk1 are inhibited to prevent entry into mitosis. Here we have studied how inhibition of Plk1 is established after DNA damage. Using a Förster resonance energy transfer (FRET)-based biosensor for Plk1 activity, we show that inhibition of Plk1 after DNA damage occurs with relatively slow kinetics and is entirely dependent on loss of Plk1-T210 phosphorylation. As T210 is phosphorylated by the kinase Aurora A in conjunction with its co-factor Bora, we investigated how they are affected by DNA damage...
October 10, 2016: Oncogene
Andreas Ritter, Alexandra Friemel, Nina-Naomi Kreis, Frank Louwen, Juping Yuan
Polo-like kinase 1 (Plk1) has been established as one of the most promising targets for molecular anticancer intervention. In fact, various Plk1 inhibitors have been identified and characterized. While the data derived from the bench are prospective, the clinical outcomes are less encouraging by showing modest efficacy. One of the explanations for this discrepancy could be unintendedly targeting of non-malignant cells by Plk1 inhibitors. In this work, we have addressed the effect of Plk1 inhibition in adipose tissue-derived mesenchymal stem cells (ASCs)...
October 5, 2016: Oncotarget
Arancha Cebrián, Teresa Gómez Del Pulgar, Maria Jesús Fernández-Aceñero, Aurea Borrero-Palacios, Laura Del Puerto-Nevado, Javier Martínez-Useros, Juan Pablo Marín-Arango, Cristina Caramés, Ricardo Vega-Bravo, María Rodríguez-Remírez, Felix Manzarbeitia, Jesús García-Foncillas
AIM: Polo-like kinase 1 (Plk1) plays a key role in mitotic cell division and DNA damage repair. It has been observed that either up-regulated or down-regulated Plk1 could induce mitotic defects that results in aneuploidy and tumorigenesis, probably depending on the context. Few previous reports have associated Plk1 expression with prognosis and response to radiotherapy in rectal carcinomas. The aim of this study is to investigate the prognostic impact of Plk1 expression and its role in predicting response to neoadjuvant cheomoradiotherapy in rectal cancer...
September 22, 2016: Pathology, Research and Practice
Dongzhi Wang, Renan Chang, Gang Wang, Baoying Hu, Yong Qiang, Zhong Chen
BACKGROUND: Recent investigations have implicated that Chitosan-nucleotide nanoparticles might be useful non-viral carriers in gene therapy. Polo-like kinase 1 (PLK1) has been reported to be an important oncogene that exerted considerable therapeutic value in hepatocellular carcinoma (HCC). OBJECTIVE: We explored whether Galactosylated chitosan-graft-poly(ethylene glycol) (GCP) nanoparticle-mediated delivery of PLK1 siRNA nucleotides could serve as an effective anti-cancer agent for HCC therapy...
September 26, 2016: Anti-cancer Agents in Medicinal Chemistry
Jia Li, Ruping Wang, Olivia J Gannon, Alyssa C Rezey, Sixin Jiang, Brennan D Gerlach, Guoning Liao, Dale D Tang
Polo-like kinase 1 (Plk1) is a serine/threonine protein kinase that has been implicated in mitosis, cytokinesis and smooth muscle cell proliferation. The role of Plk1 in smooth muscle contraction has not been investigated. Here, stimulation with acetylcholine induced Plk1 phosphorylation at Thr-210 (an indication of Plk1 activation) in smooth muscle. Contractile stimulation also activated Plk1 in live smooth muscle cells as evidenced by changes in fluorescence resonance energy transfer signal of a Plk1 sensor...
September 23, 2016: Journal of Biological Chemistry
Jawaid Akhtar, Ahsan Ahmed Khan, Zulphikar Ali, Rafi Haider, M Shahar Yar
The present review article offers a detailed account of the design strategies employed for the synthesis of nitrogen-containing anticancer agents. The results of different studies describe the N-heterocyclic ring system is a core structure in many synthetic compounds exhibiting a broad range of biological activities. Benzimidazole, benzothiazole, indole, acridine, oxadiazole, imidazole, isoxazole, pyrazole, triazoles, quinolines and quinazolines including others drugs containing pyridazine, pyridine and pyrimidines are covered...
September 9, 2016: European Journal of Medicinal Chemistry
Melanie Schwermer, Sabine Dreesmann, Angelika Eggert, Kristina Althoff, Laura Steenpass, Alexander Schramm, Johannes H Schulte, Petra Temming
BACKGROUND: Retinoblastoma is the most common malignant cancer of the eye in children. While metastatic retinoblastoma is rare, cure rates for this advanced disease remain below 50%. High-level PLK1 expression in retinoblastomas has previously been shown to be correlated with adverse outcome parameters. PLK1 is a serine/threonine kinase involved in cell cycle regulation at the G2/M transition. PLK1 inhibition has been demonstrated to have anti-tumour effects in preclinical models of several paediatric tumours...
September 19, 2016: Clinical & Experimental Ophthalmology
Jiafeng Li, Jinsheng Zhao, Yue Li
Overexpression of the nucleoporin NUP88 has been observed in a large number of tumors and has been experimentally proven to promote tumorigenesis. However, the mechanism underlying the tumor-promoting activity of overexpressed NUP88 is not clear. To investigate the potential pathways that drive tumorigenesis under NUP88 overexpressed condition, we applied a proteomic approach to identify NUP88-associated proteins at a subcellular compartment level. Gene ontology analysis revealed significant associations between NUP88 interactome and biological processes that are related to nuclear transport, RNA processing, cell cycle progression, metabolic regulation, and viral infection...
September 16, 2016: Genes, Chromosomes & Cancer
Himanshu Arora, Rehana Qureshi, M A Rizvi, Sharad Shrivastava, Mordhwaj S Parihar
Abnormalities in apoptotic functions contribute to the pathogenesis of colorectal cancer. In this study, molecular interactions behind the apoptotic regulation have been explored. For this purpose, enrichment analysis was performed considering microRNAs (miRNAs) that putatively target TP53 and altered during colon cancer. This revealed gene associated with both TP53 and miRNAs. Further analysis showed that a significant molecular interaction between the shortlisted candidates (TP53, miR-143, KRAS, BCL2, and PLK1) exists...
September 15, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Qingqing Mo, Yu Zhang, Xin Jin, Yue Gao, Yuan Wu, Xing Hao, Qinglei Gao, Pingbo Chen
Paclitaxel is a mitotic inhibitor used in ovarian cancer chemotherapy. Unfortunately, due to the rapid genetic and epigenetic changes in adaptation to stress induced by anticancer drugs, cancer cells are often able to become resistant to single or multiple anticancer agents. However, it remains largely unknown how paclitaxel resistance happens. In this study, we generated a cell line of acquired resistance to paclitaxel therapy, A2780T, which is cross-resistant to other antimitotic drugs, such as PLK1 inhibitor or AURKA inhibitor...
September 15, 2016: Tumour Biology: the Journal of the International Society for Oncodevelopmental Biology and Medicine
Xue Zhi Zhao, David Hymel, Terrence R Burke
By a process involving initial screening of a set of 87 aldehydes using an oxime ligation-based strategy, we were able to achieve a several-fold affinity enhancement over one of the most potent previously known polo-like kinase 1 (Plk1) polo-box domain (PBD) binding inhibitors. This improved binding may result by accessing a newly identified auxiliary region proximal to a key hydrophobic cryptic pocket on the surface of the protein. Our findings could have general applicability to the design of PBD-binding antagonists...
October 15, 2016: Bioorganic & Medicinal Chemistry Letters
Warapen Treekitkarnmongkol, Hiroshi Katayama, Kazuharu Kai, Kaori Sasai, Jennifer Carter Jones, Jing Wang, Li Shen, Aysegul A Sahin, Mihai Gagea, Naoto T Ueno, Chad J Creighton, Subrata Sen
Recent data from The Cancer Genome Atlas analysis have revealed that Aurora kinase A (AURKA) amplification and overexpression characterize a distinct subset of human tumors across multiple cancer types. Although elevated expression of AURKA has been shown to induce oncogenic phenotypes in cells in vitro, findings from transgenic mouse models of Aurora-A overexpression in mammary glands have been distinct depending on the models generated. In the present study, we report that prolonged overexpression of AURKA transgene in mammary epithelium driven by ovine β-lactoglobulin promoter, activated through multiple pregnancy and lactation cycles, results in the development of mammary adenocarcinomas with alterations in cancer-relevant genes and epithelial-to-mesenchymal transition...
September 13, 2016: Carcinogenesis
Yuuki Kozakai, Rui Kamada, Junya Furuta, Yuhei Kiyota, Yoshiro Chuman, Kazuyasu Sakaguchi
An increase of nucleolar number and size has made nucleoli essential markers for cytology and tumour development. However, the underlying basis for their structural integrity and abundance remains unclear. Protein phosphatase PPM1D was found to be up-regulated in different carcinomas including breast cancers. Here, we demonstrate for the first time that PPM1D regulates nucleolar formation via inducing an increased phosphorylation of the nucleolar protein NPM. We show that PPM1D overexpression induces an increase in the nucleolar number regardless of p53 status...
2016: Scientific Reports
Ying Mao, Xigui Chen, Min Xu, Kyota Fujita, Kazumi Motoki, Toshikazu Sasabe, Hidenori Homma, Miho Murata, Kazuhiko Tagawa, Takuya Tamura, Julia Kaye, Steven Finkbeiner, Giovanni Blandino, Marius Sudol, Hitoshi Okazawa
Neuronal cell death in neurodegenerative diseases is not fully understood. Here we report that mutant huntingtin (Htt), a causative gene product of Huntington's diseases (HD) selectively induces a new form of necrotic cell death, in which endoplasmic reticulum (ER) enlarges and cell body asymmetrically balloons and finally ruptures. Pharmacological and genetic analyses revealed that the necrotic cell death is distinct from the RIP1/3 pathway-dependent necroptosis, but mediated by functional deficiency of TEAD/YAP-dependent transcription...
September 12, 2016: Human Molecular Genetics
Hung-Chuan Chiu, Wei-Ru Huang, Tsai-Ling Liao, Hung-Yi Wu, Muhammad Munir, Wing-Ling Shih, Hung-Jen Liu
The p17 protein of avian reovirus (ARV) causes cell cycle retardation in a variety of cell lines; however, the underlying mechanism(s) by which p17 regulates the cell cycle remains largely unknown. We demonstrate for the first time that p17 interacts with CDK1 and vimentin as revealed by reciprocal co-immunoprecipitation and GST pull-down assays. Both in vitro and in vivo studies indicated that direct interaction of p17 and CDK1/vimentin was mapped within the amino terminus (aa 1-60) of p17 and central region (aa 27-118) of CDK1/vimentin...
2016: PloS One
Piotr Donizy, Agnieszka Halon, Pawel Surowiak, Maciej Kaczorowski, Cyprian Kozyra, Rafal Matkowski
Polo-like kinase 1 (PLK1) is a serine-threonine kinase that plays a crucial role in the regulation of cell division. In addition, it acts as a modulator of the DNA damage response and as a novel factor in the maintenance of genome stability during DNA replication. The present study aimed to reveal the associations between PLK1 expression and clinicopathological features of patients with breast cancer (BC), particularly patient survival at 5-, 10- and 15-year follow-up. PLK1 expression was evaluated immunohistochemically in routine diagnostic tissue specimens from 83 patients treated radically for stage II BC...
September 2016: Oncology Letters
Taikangxiang Yun, Tan Qin, Ying Liu, Luhua Lai
Thiourea derivatives have drawn much attention for their latent capacities of biological activities. In this study, we designed acylthiourea compounds as polo-like kinase 1 (Plk1) polo-box domain (PBD) inhibitors. A series of acylthiourea derivatives without pan assay interference structure (PAINS) were synthesized. Four compounds with halogen substituents exhibited binding affinities to Plk1 PBD in low micromole range. The most potent compound (3v) showed selectivity over other subtypes of Plk PBDs and inhibited the kinase activity of full-length Plk1...
August 22, 2016: European Journal of Medicinal Chemistry
Maria Teresa Bengoechea-Alonso, Johan Ericsson
The SREBP transcription factors are major regulators of lipid metabolism. Disturbances in lipid metabolism are at the core of several health issues facing modern society, including cardiovascular disease, obesity and diabetes. In addition, the role of lipid metabolism in cancer cell growth is receiving increased attention. Transcriptionally active SREBP molecules are unstable and rapidly degraded in a phosphorylation-dependent manner by Fbw7, a ubiquitin ligase that targets several cell cycle regulatory proteins for degradation...
October 17, 2016: Cell Cycle
Lan Yu, Zeng-Fu Shang, Salim Abdisalaam, Kyung-Jong Lee, Arun Gupta, Jer-Tsong Hsieh, Aroumougame Asaithamby, Benjamin P C Chen, Debabrata Saha
Defects in kinetochore-microtubule (KT-MT) attachment and the spindle assembly checkpoint (SAC) during cell division are strongly associated with chromosomal instability (CIN). CIN has been linked to carcinogenesis, metastasis, poor prognosis and resistance to cancer therapy. We previously reported that the DAB2IP is a tumor suppressor, and that loss of DAB2IP is often detected in advanced prostate cancer (PCa) and is indicative of poor prognosis. Here, we report that the loss of DAB2IP results in impaired KT-MT attachment, compromised SAC and aberrant chromosomal segregation...
October 14, 2016: Nucleic Acids Research
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"