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prostate cancer methylation

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https://www.readbyqxmd.com/read/29143354/synthesis-and-biological-properties-of-radiohalogenated-%C3%AE-%C3%AE-disubstituted-amino-acids-for-pet-and-spect-imaging-of-amino-acid-transporters-aats
#1
Mark M Goodman, Weiping Yu, Nashwa Jarkas
Fluorine-18 and iodine-123 labeled non-natural alicyclic and methyl branched disubstituted α,α-amino acids are a diverse and useful class of tumor imaging agents suitable for positron emission tomography (PET) and single photon emission computed tomography (SPECT). These tracers target the increased expression of the cell membrane amino acid transporter systems L, ASC and A exhibited by many human tumor cells. The most established clinical use for these radiolabeled amino acids is imaging primary and recurrent gliomas, and primary, recurrent and metastatic prostate cancer...
November 16, 2017: Journal of Labelled Compounds & Radiopharmaceuticals
https://www.readbyqxmd.com/read/29141455/methionine-adenosyltransferases-in-cancers-mechanisms-of-dysregulation-and-implications-for-therapy
#2
Lauren Y Maldonado, Diana Arsene, José M Mato, Shelly C Lu
Methionine adenosyltransferase genes encode enzymes responsible for the biosynthesis of S-adenosylmethionine, the principal biological methyl donor and precursor of polyamines and glutathione. Mammalian cells express three genes - MAT1A, MAT2A, and MAT2B - with distinct expression and functions. MAT1A is mainly expressed in the liver and maintains the differentiated states of both hepatocytes and bile duct epithelial cells. Conversely, MAT2A and MAT2B are widely distributed in non-parenchymal cells of the liver and extrahepatic tissues...
January 1, 2017: Experimental Biology and Medicine
https://www.readbyqxmd.com/read/29137428/pten-loss-is-associated-with-prostate-cancer-recurrence-and-alterations-in-tumor-dna-methylation-profiles
#3
Milan S Geybels, Min Fang, Jonathan L Wright, Xiaoyu Qu, Marina Bibikova, Brandy Klotzle, Jian-Bing Fan, Ziding Feng, Elaine A Ostrander, Peter S Nelson, Janet L Stanford
Background: Prostate cancer (PCa) with loss of the tumor suppressor gene PTEN has an unfavorable prognosis. DNA methylation profiles associated with PTEN loss may provide further insights into the mechanisms underlying these more aggressive, clinically relevant tumors. Methods: The cohort included patients with clinically localized PCa. Samples taken from the primary tumor were used to determine PTEN genomic deletions using FISH, and to analyze epigenome-wide DNA methylation profiles...
October 13, 2017: Oncotarget
https://www.readbyqxmd.com/read/29137265/c-met-creb1-and-egfr-are-involved-in-mir-493-5p-inhibition-of-emt-via-akt-gsk-3%C3%AE-snail-signaling-in-prostate-cancer
#4
Song Wang, Xiao Wang, Jiangfeng Li, Shuai Meng, Zhen Liang, Xin Xu, Yi Zhu, Shiqi Li, Jian Wu, Mingjie Xu, Alin Ji, Yiwei Lin, Ben Liu, Xiangyi Zheng, Bo Xie, Liping Xie
miR-493-5p downregulation has emerged as a critical player in cancer progression yet, the underlying mechanisms of miR-493-5p expression pattern and its function in prostate cancer remains to be elucidated. Here, we illustrate that miR-493-5p is frequently downregulated in prostate cancer, at least partially due to altered DNA methylation. miR-493-5p functions as a tumor suppressor in prostate cancer cells. c-Met, CREB1 and EGFR are downstream target genes of miR-493-5p. miR-493-5p inhibits EMT via AKT/GSK-3β/Snail signaling in prostate cancer...
October 10, 2017: Oncotarget
https://www.readbyqxmd.com/read/29122400/aberrant-promoter-methylation-of-the-paqr3-gene-is-associated-with-prostate-cancer
#5
Kowit Lounglaithong, Andrey Bychkov, Pichet Sampatanukul
Methylation markers are promising tools for diagnosis, prognosis and targeted treatment of cancer. In prostate carcinoma, aberrant promoter hypermethylation occurs earlier in the disease course and more consistently than recurrent somatic mutations. PAQR3, a tumor suppressor gene, was recently found to be downregulated in prostate cancer cell lines. We hypothesized that promoter methylation could be responsible for PAQR3 silencing in prostate cancer tissues. We aimed to investigate PAQR3 promoter methylation in prostate cancer by comparing it to benign prostatic hyperplasia (BPH)...
October 10, 2017: Pathology, Research and Practice
https://www.readbyqxmd.com/read/29108267/beta-catenin-represses-protein-kinase-d1-gene-expression-by-non-canonical-pathway-through-myc-max-transcription-complex-in-prostate-cancer
#6
Bita Nickkholgh, Sivanandane Sittadjody, Michael B Rothberg, Xiaolan Fang, Kunzhao Li, Jeff W Chou, Gregory A Hawkins, K C Balaji
Down regulation of Protein Kinase D1 (PrKD1), a novel serine threonine kinase, in prostate, gastric, breast and colon cancers in humans leads to disease progression. While the down regulation of PrKD1 by DNA methylation in gastric cancer and by nuclear beta-catenin in colon cancer has been shown, the regulatory mechanisms in other cancers are unknown. Because we had demonstrated that PrKD1 is the only known kinase to phosphorylate threonine 120 (T120) of beta-catenin in prostate cancer resulting in increased nuclear beta-catenin, we explored the role of beta-catenin in gene regulation of PrKD1...
October 3, 2017: Oncotarget
https://www.readbyqxmd.com/read/29084195/c10orf116-gene-copy-number-loss-in-prostate-cancer-clinicopathological-correlations-and-prognostic-significance
#7
Jie Meng, Li-Hui Wang, Chun-Lin Zou, Sheng-Ming Dai, Jian Zhang, Yi Lu
BACKGROUND Prostate cancer (PCa) is the second most commonly diagnosed cancer in males worldwide. This study aimed to identify differentially expressed genes and to investigate the potential correlation between gene abnormalities and clinical features in PCa to evaluate disease progression and prognosis. MATERIAL AND METHODS A total of 4 independent microarrays of PCa patients from the Oncomine database were used to identify differences in expression of genes contributing to cancer progression. Quantitative real-time polymerase chain reaction (RT-qPCR) analysis was used to evaluate the mRNA expression of the target in human prostate cancer cells...
October 30, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29081338/effect-of-mono-2-ethyhexyl-phthalate-on-dna-methylation-in-human-prostate-cancer-lncap-cells
#8
Jian Hui Wu, Jiao Chen, Yong Wang, Bin Xia, Rong Wang, Yan Zhao, Qin Xia Wang, Qi Song, Shun Heng Yao, Yun Hui Zhang, Zu Yue Sun
OBJECTIVE: To evaluate whether mono (2-ethylhexyl) phthalate (MEHP) affects genomic DNA methylation and the methylation status of some specific genes such as patched gene (PTCH) and smoothened gene (SMO) in LNCaP cells. METHODS: LNCaP cells were treated with MEHP (0, 1, 5, 10, and 25 μmol/L) for 3 days. An ELISA assay was preformed to detect genomic methylation, including 5-methylcytosine (5-mC) and 5-hydroxymethylcytosine (5-hmC) content. A pyrosequencing assay was applied to assess DNA methylation in PTCH and SMO gene promoters...
September 2017: Biomedical and Environmental Sciences: BES
https://www.readbyqxmd.com/read/29073199/reduced-expression-of-iqgap2-and-higher-expression-of-iqgap3-correlates-with-poor-prognosis-in-cancers
#9
Dinesh Kumar, Md Khurshidul Hassan, Niharika Pattnaik, Nachiketa Mohapatra, Manjusha Dixit
IQGAPs is a family of proteins which comprises three members, in humans. The expression pattern and role of IQGAP1 has been well established in many cancers, whereas those of IQGAP2 and IQGAP3, have mostly remained unexplored. We used available large datasets, to explore the pan-cancer status of these two genes in-silico. Here we have analysed their mRNA expression and correlation with survivability in eight different cancers, including lung, breast, gastric, brain, colorectal, prostate, liver and kidney cancers and, their subtypes...
2017: PloS One
https://www.readbyqxmd.com/read/29066912/identification-of-key-pathways-and-genes-with-aberrant-methylation-in-prostate-cancer-using-bioinformatics-analysis
#10
Anshika N Singh, Neeti Sharma
Prostate cancer (PCa), a multifocal clinically heterogeneous disease, is the most commonly diagnosed non-cutaneous neoplasm in men worldwide. The epigenome of PCa is a typical representation of catastrophic model of epigenetic alterations during tumorigenesis and its progression. Alterations in methylation patterns in tumor suppressors, cell cycle, oncogenes and metabolism-related genes are the most commonly observed epigenetic alterations in PCa. In this study, we have developed a computational strategy to identify methylated biomarker signature panels as potential targets of PCa by screening >160 genes reported to be epigenetically dysregulated, and shortlisted 26 differentially methylated genes (DMGs) that significantly contribute to oncogenesis...
2017: OncoTargets and Therapy
https://www.readbyqxmd.com/read/29048620/dna-methylation-and-histone-modifications-as-epigenetic-regulation-in-prostate-cancer-review
#11
Maria Nowacka-Zawisza, Ewelina Wiśnik
Prostate cancer is the second most commonly diagnosed cancer in men in Poland after lung cancer and the third leading cause of cancer-related mortality after lung and colon cancer. The etiology of most cases of prostate cancer are not fully known, and therefore it is essential to search for the molecular basis of prostate cancer and markers for the early diagnosis of this type of cancer. Epigenetics deals with changes in gene expression that are not determined by changes in the DNA sequence. Epigenetic changes refer to changes in the structure of DNA, which are the result of DNA modification after replication and/or post-translational modification of proteins associated with DNA...
September 20, 2017: Oncology Reports
https://www.readbyqxmd.com/read/29039785/prospective-comparison-of-f-18-choline-pet-ct-scan-versus-axial-mri-for-detecting-bone-metastasis-in-biochemically-relapsed-prostate-cancer-patients
#12
Wouter Huysse, Frédéric Lecouvet, Paolo Castellucci, Piet Ost, Valerie Lambrecht, Carlos Artigas, Marie-Laurence Denis, Kathia De Man, Louke Delrue, Lennart Jans, Aurélie De Bruycker, Filip De Vos, Gert De Meerleer, Karel Decaestecker, Valerie Fonteyne, Bieke Lambert
We compared fluor-18 choline positron emission tomography/computed tomography (PET/CT) and axial skeleton magnetic resonance imaging (MRI) prospectively obtained for the detection of bone metastases in non-castrated patients with biochemically recurrent prostate cancer following primary treatment. PET/CT was performed 45 min post-injection of 3-4 MBq/kg F-18 methyl choline. MRI included T1- and fluid sensitive T2-weighted images of the spine and pelvis. Readers were initially blinded from other results and all scans underwent independent double reading...
October 17, 2017: Diagnostics
https://www.readbyqxmd.com/read/29031200/oleanolic-acid-methyl-ester-a-novel-cytotoxic-mitocan-induces-cell-cycle-arrest-and-ros-mediated-cell-death-in-castration-resistant-prostate-cancer-pc-3-cells
#13
Noha Abdelmageed, Samy A F Morad, Ashraf A Elghoneimy, Tatiana Syrovets, Thomas Simmet, Hesham El-Zorba, Hossney A El-Banna, Myles Cabot, Magdy I Abdel-Aziz
Oleanolic acid derivatives exhibit potent anticancer activities against numerous types of cancer. However, the antitumor activity of oleanolic acid methylester (OAME), an oleanolic acid derivative, against prostate cancer has not been studied. Hence, the present work was conducted to study the anticancer activities of OAME. Viability assay showed that treatment of cancer cells with OAME induced a significant cell death in concentration- and time-dependent manner. Of note, OAME displayed a selective cytotoxicity against cancer cells compared to normal epithelial cells...
October 11, 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
https://www.readbyqxmd.com/read/29026066/aberrant-promoter-methylation-of-protocadherin8-pcdh8-in-serum-is-a-potential-prognostic-marker-for-low-gleason-score-prostate-cancer
#14
Ying-Li Lin, Yan-Li Li, Jian-Guo Ma
BACKGROUND PCDH8 is a newly-discovered suppressor gene that is frequently inactivated by aberrant methylation in several human cancers, including prostate cancer. The identification of PCDH8 methylation can be used as a potential predictive biomarker. Prostate cancer patients with high Gleason score are considered as being at high risk for tumor recurrence and progression, and adjuvant therapy is often routinely performed in clinical practice. In the present study, we did not measure the methylation of PCDH8 in these patients...
October 13, 2017: Medical Science Monitor: International Medical Journal of Experimental and Clinical Research
https://www.readbyqxmd.com/read/29017567/impairment-of-igf2-gene-expression-in-prostate-cancer-is-triggered-by-epigenetic-dysregulation-of-igf2-dmr0-and-its-interaction-with-klf4
#15
Undraga Schagdarsurengin, Angela Lammert, Natalie Schunk, Diana Sheridan, Stefan Gattenloehner, Klaus Steger, Florian Wagenlehner, Temuujin Dansranjavin
BACKGROUND: Human cancer cells often exhibit impaired IGF2 expression and the underlying mechanisms are multifaceted and complex. Besides the well-known imprinting control region IGF2/H19-ICR, the involvement of a differentially methylated region in the promoter P0 of IGF2 gene (IGF2-DMR0) has been suggested. Here, we evaluate several mechanisms potentially leading to up- and/or down-regulation of IGF2 expression in prostate cancer and present a novel role of Kruppel-like factor 4 (KLF4) as a transcriptional regulator of IGF2 binding in IGF2-DMR0...
October 10, 2017: Cell Communication and Signaling: CCS
https://www.readbyqxmd.com/read/28993410/pace4-undergoes-an-oncogenic-alternative-splicing-switch-in-cancer
#16
Frédéric Couture, Robert Sabbagh, Anna Kwiatkowska, Roxane Desjardins, Simon-Pierre Guay, Luigi Bouchard, Robert Day
Inhibition of PACE4, a proprotein convertase that is overexpressed in prostate cancer, has been shown to block cancer progression in an androgen-independent manner. However, the basis for its overexpression and how its growth inhibitory effects are mitigated and uncertain. Here we report that PACE4 pre-mRNA undergoes DNA methylation-sensitive alternative splicing of its terminal exon 3' untranslated region, generating an oncogenic, C-terminally modified isoform (PACE4-altCT). We found this isoform to be strongly expressed in prostate cancer cells, where it displayed an enhanced auto-activating process and a distinct intracellular routing that prevented its extracellular secretion...
October 9, 2017: Cancer Research
https://www.readbyqxmd.com/read/28977898/decreased-expression-of-mt1e-is-a-potential-biomarker-of-prostate-cancer-progression
#17
Rita Demidenko, Kristina Daniunaite, Arnas Bakavicius, Rasa Sabaliauskaite, Aiste Skeberdyte, Donatas Petroska, Arvydas Laurinavicius, Feliksas Jankevicius, Juozas R Lazutka, Sonata Jarmalaite
Differentiation of indolent and aggressive prostate carcinoma (PCa) at the time of diagnosis is currently one of the major challenges. This study aimed at identification of prognostic biomarkers to aid in predicting biochemical recurrence (BCR) of the disease. Microarray-based gene expression profiling in tissues of 8 BCR and 8 No-BCR cases revealed expression differences of 455 genes, most of which were down-regulated in BCR cases. Eleven genes were selected for validation by real-time PCR in the first PCa cohort (N = 55), while seven of them were further validated in the second, independent, PCa cohort (N = 53)...
September 22, 2017: Oncotarget
https://www.readbyqxmd.com/read/28968981/structure-based-design-synthesis-and-activity-studies-of-small-hybrid-molecules-as-hdac-and-g9a-dual-inhibitors
#18
Lanlan Zang, Shukkoor M Kondengaden, Qing Zhang, Xiaobo Li, Dilep K Sigalapalli, Shameer M Kondengadan, Kenneth Huang, Keqin Kathy Li, Shanshan Li, Zhongying Xiao, Liuqing Wen, Hailiang Zhu, Bathini N Babu, Lijuan Wang, Fengyuan Che, Peng George Wang
Aberrant enzymatic activities or expression profiles of epigenetic regulations are therapeutic targets for cancers. Among these, histone 3 lysine 9 methylation (H3K9Me2) and global de-acetylation on histone proteins are associated with multiple cancer phenotypes including leukemia, prostatic carcinoma, hepatocellular carcinoma and pulmonary carcinoma. Here, we report the discovery of the first small molecule capable of acting as a dual inhibitor targeting both G9a and HDAC. Our structure based design, synthesis, and screening for the dual activity of the small molecules led to the discovery of compound 14 which displays promising inhibition of both G9a and HDAC in low micro-molar range in cell based assays...
September 8, 2017: Oncotarget
https://www.readbyqxmd.com/read/28967902/a-regulatory-circuit-hp1%C3%AE-mir-451a-c-myc-promotes-prostate-cancer-progression
#19
C Chang, J Liu, W He, M Qu, X Huang, Y Deng, L Shen, X Zhao, H Guo, J Jiang, X Y Fu, R Huang, D Zhang, J Yan
Heterochromatin protein 1γ (HP1γ) has been implicated in carcinogenesis of various cancer types. However, the role of HP1γ in prostate cancer (PCa) progression and the underlying molecular mechanisms remain largely unknown. We found that HP1γ is upregulated in PCa and elevated levels of HP1γ in PCa predict poor outcome. In addition, depletion of HP1γ in PCa cells not only repressed proliferation and induced apoptosis but also impaired tumorigenicity. We also found that c-Myc was capable of upregulating HP1γ by directly binding to the E-box element in the first intron of HP1γ gene, and the upregulated HP1γ, in turn, repressed the expression of miR-451a by enhancing H3K9 methylation at the promoter region of miR-451a...
October 2, 2017: Oncogene
https://www.readbyqxmd.com/read/28952292/triptolide-promotes-senescence-of-prostate-cancer-cells-through-histone-methylation-and-heterochromatin-formation
#20
Ousman Tamgue, Ming Lei
Background: Triptolide is a medicinal herb-derived diterpene triepoxide with potent anti-tumor activity, mainly ,correlated with its ability to inhibit and inactivate subunits of RNA polymerase II, thereby suppressing global gene transcription. Epigenetic imbalance including histone methylation are well known to play important roles in prostate cancer (PCa) onset and progression. The goal of this study was to investigate whether triptolide might exert anti-PCa influence by reshaping the histone methylation landscape...
September 27, 2017: Asian Pacific Journal of Cancer Prevention: APJCP
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