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https://www.readbyqxmd.com/read/28101583/integrated-analysis-of-microrna-and-transcription-factor-reveals-important-regulators-and-regulatory-motifs-in-adult-b-cell-acute-lymphoblastic-leukemia
#1
Xiao-Cong Lin, Xin-Guang Liu, Yu-Ming Zhang, Ning Li, Zhi-Gang Yang, Wei-Yu Fu, Liu-Bo Lan, Hai-Tao Zhang, Yong Dai
B-cell acute lymphoblastic leukemia (B‑ALL) is an aggressive hematological malignancy and a leading cause of cancer-related mortality in children and young adults. The molecular mechanisms involved in the regulation of its gene expression has yet to be fully elucidated. In the present study, we performed large scale expression profiling of microRNA (miRNA) and transcription factor (TF) by Illumina deep‑sequencing and TF array technology, respectively, and identified 291 differentially expressed miRNAs and 201 differentially expressed TFs in adult B‑ALL samples relative to their controls...
February 2017: International Journal of Oncology
https://www.readbyqxmd.com/read/28101190/ror2-inhibits-the-proliferation-of-gastric-carcinoma-cells-via-activation-of-non-canonical-wnt-signaling
#2
Likun Yan, Qingguo Du, Jianfeng Yao, Ruiting Liu
Gastric carcinoma is one of the most common human cancers and has a poor prognosis. Receptor tyrosine kinase-like orphan receptor 2 (ROR2), which is a non-canonical receptor of the Wnt signaling pathway, has been reported to be deregulated in numerous types of human cancers, including gastric carcinoma. However, the exact role of ROR2 in the regulation of the malignant phenotypes of gastric carcinoma, as well as the underlying molecular mechanism, remains largely unclear. The present study demonstrated that ROR2 was recurrently downregulated in gastric carcinoma tissues, as compared with their matched adjacent normal tissues...
December 2016: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/28100678/modulation-of-naive-cd8-t-cell-response-features-by-ligand-density-affinity-and-continued-signaling-via-internalized-tcrs
#3
Renu Balyan, Rupali Gund, Chitra Ebenezer, Jasneet Kaur Khalsa, Divya Anna Verghese, Thyagarajan Krishnamurthy, Anna George, Vineeta Bal, Satyajit Rath, Ashutosh Chaudhry
T cell response magnitudes increase with increasing antigenic dosage. However, it is unclear whether ligand density only modulates the proportions of responding ligand-specific T cells or also alters responses at the single cell level. Using brief (3 h) exposure of TCR-transgenic mouse CD8 T cells in vitro to varying densities of cognate peptide-MHC ligand followed by ligand-free culture in IL-2, we found that ligand density determined the frequencies of responding cells but not the expression levels of the early activation marker molecule, CD69...
January 18, 2017: Journal of Immunology: Official Journal of the American Association of Immunologists
https://www.readbyqxmd.com/read/28100400/replication-study-bet-bromodomain-inhibition-as-a-therapeutic-strategy-to-target-c-myc
#4
Fraser Aird, Irawati Kandela, Christine Mantis
In 2015, as part of the Reproducibility Project: Cancer Biology, we published a Registered Report (Kandela et al., 2015) that described how we intended to replicate selected experiments from the paper "BET bromodomain inhibition as a therapeutic strategy to target c-Myc" (Delmore et al., 2011). Here we report the results of those experiments. We found that treatment of human multiple myeloma (MM) cells with the small-molecular inhibitor of BET bromodomains, (+)-JQ1, selectively downregulated MYC transcription, which is similar to what was reported in the original study (Figure 3B; Delmore et al...
January 19, 2017: ELife
https://www.readbyqxmd.com/read/28100396/small-molecules-remain-on-target-for-c-myc
#5
Linchong Sun, Ping Gao
Targeting the transcription factor c-Myc via one of its coactivator proteins is a promising strategy for cancer therapy.
January 19, 2017: ELife
https://www.readbyqxmd.com/read/28100038/trim8-regulates-stemness-in-glioblastoma-through-pias3-stat3
#6
Changming Zhang, Subhas Mukherjee, Carol Tucker-Burden, James L Ross, Monica J Chau, Jun Kong, Daniel J Brat
Glioblastoma (GBM) is the most malignant form of primary brain tumor and GBM stem-like cells (GSCs) contribute to the rapid growth, therapeutic resistance and clinical recurrence of these fatal tumors. STAT3 signaling supports the maintenance and proliferation of GSCs, yet regulatory mechanisms are not completely understood. Here we report that tri-partite motif containing protein 8 (TRIM8) activates STAT3 signaling to maintain stemness and self-renewing capabilities of GSCs. TRIM8 (also known as "glioblastoma expressed ring finger protein") is expressed equally in GBM and normal brain tissues, despite its hemizygous deletion in the large majority of GBMs, and its expression is highly correlated with stem cell markers...
January 18, 2017: Molecular Oncology
https://www.readbyqxmd.com/read/28100021/identifying-the-biphasic-role-of-calcineurin-nfat-signaling-enables-replacement-of-sox2-in-somatic-cell-reprogramming
#7
Sherif Khodeer, Takumi Era
Induction of pluripotency with defined factors (Oct4, Sox2, Klf4, c-Myc) raises hopes for successful clinical trials. Despite considerable efforts, the molecular mechanism of reprogramming remains poorly understood. The aim of the present study was to identify the role of calcineurin/nuclear factor of activated T cells (NFAT) in reprogramming. Our results demonstrated a biphasic role for calcineurin/NFAT signaling during reprogramming. In the early phase of reprogramming, calcineurin activity is required to maintain proper cell cycle division and for mesenchymal-epithelial transition...
January 18, 2017: Stem Cells
https://www.readbyqxmd.com/read/28099902/anthelmintic-mebendazole-enhances-cisplatin-s-effect-on-suppressing-cell-proliferation-and-promotes-differentiation-of-head-and-neck-squamous-cell-carcinoma-hnscc
#8
Fugui Zhang, Yong Li, Hongmei Zhang, Enyi Huang, Lina Gao, Wenping Luo, Qiang Wei, Jiaming Fan, Dongzhe Song, Junyi Liao, Yulong Zou, Feng Liu, Jianxiang Liu, Jiayi Huang, Dan Guo, Chao Ma, Xue Hu, Li Li, Xiangyang Qu, Liqun Chen, Xinyi Yu, Zhicai Zhang, Tingting Wu, Hue H Luu, Rex C Haydon, Jinlin Song, Tong-Chuan He, Ping Ji
Head and neck squamous cell carcinoma (HNSCC) is one of the most common and aggressive types of human cancers worldwide. Nearly a half of HNSCC patients experience recurrence within five years of treatment and develop resistance to chemotherapy. Thus, there is an urgent clinical need to develop safe and novel anticancer therapies for HNSCC. Here, we investigate the possibility of repurposing the anthelmintic drug mebendazole (MBZ) as an anti-HNSCC agent. Using the two commonly-used human HNSCC lines CAL27 and SCC15, we demonstrate MBZ exerts more potent anti-proliferation activity than cisplatin in human HNSCC cells...
January 16, 2017: Oncotarget
https://www.readbyqxmd.com/read/28098905/cripto-1-promotes-epithelial-mesenchymal-transition-in-prostate-cancer-via-wnt-%C3%AE-catenin-signaling
#9
Yan Liu, Zhenbang Qin, Kuo Yang, Ranlu Liu, Yong Xu
The Cripto-1 (CR-1) derived EGF-CFC family was overexpressed in tumor development enhancing proliferation, epithelial-mesenchymal transition (EMT) and migration of tumor cells. However, correlation between CR-1 and prostate cancer (PCa) remains still unclear. In the present study, we proved that CR-1 was expressed in PCa and its function was in the progression of PCa. Compared with benign prostatic hyperplasia (BPH) tissues, we confirmed that PCa tissues had high expression of CR-1 by immunohistochemistry and statistical data showed that CR-1 promoted properties of EMT in PCa tissues, including the downregulation of the cell adhesion molecules β-catenin (membrane) and E-cadherin while upregulating transcription factors β-catenin...
January 17, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28097464/cdc42-promotes-schwann-cell-proliferation-and-migration-through-wnt-%C3%AE-catenin-and-p38-mapk-signaling-pathway-after-sciatic-nerve-injury
#10
Bin Han, Jun-Ying Zhao, Wu-Tao Wang, Zheng-Wei Li, Ai-Ping He, Xiao-Yang Song
Schwann cells (SCs) are unique glial cells in the peripheral nerve and may secrete multiple neurotrophic factors, adhesion molecules, extracellular matrix molecules to form the microenvironment of peripheral nerve regeneration, guiding and supporting nerve proliferation and migration. Cdc42 plays an important regulatory role in dynamic changes of the cytoskeleton. However, there is a little study referred to regulation and mechanism of Cdc42 on glial cells after peripheral nerve injury. The present study investigated the role of Cdc42 in the proliferation and migration of SCs after sciatic nerve injury...
January 17, 2017: Neurochemical Research
https://www.readbyqxmd.com/read/28097162/antioxidant-activity-of-polyphenolic-myricetin-in-vitro-cell-free-and-cell-based-systems
#11
Abolfazl Barzegar
Myricetin (Myc) is one of the most important flavonoids in diet due to its abundance in foods with the highest antioxidant activity. The antioxidant activity of Myc was studied in cell-free and cell-based systems to evaluate the ROS protection efficiency of Myc. The studies were based on the assessment of reducing power of Myc according to ferric ion reduction and intracellular ROS level measurement by assaying the cellular fluorescence intensity using dichlorodihydrofluorescein (DCF) probe as an indicator for ROS in cells...
June 2016: Molecular Biology Research Communications
https://www.readbyqxmd.com/read/28096969/dendrosomal-nanocurcumin-and-p53-overexpression-synergistically-trigger-apoptosis-in-glioblastoma-cells
#12
Reihaneh Keshavarz, Babak Bakhshinejad, Sadegh Babashah, Narges Baghi, Majid Sadeghizadeh
OBJECTIVES: Glioblastoma is the most lethal tumor of the central nervous system. Here, we aimed to evaluate the effects of exogenous delivery of p53 and a nanoformulation of curcumin called dendrosomal curcumin (DNC), alone and in combination, on glioblastoma tumor cells. MATERIALS AND METHODS: MTT assay was exploited to measure the viability of U87-MG cells against DNC treatment. Cells were separately subjected to DNC treatment and transfected with p53-containing vector and then were co-exposed to DNC and p53 overexpression[A GA1][B2]...
December 2016: Iranian Journal of Basic Medical Sciences
https://www.readbyqxmd.com/read/28096698/burkitt-lymphoma-in-adolescents-and-young-adults-management-challenges
#13
REVIEW
Massimo Dozzo, Francesca Carobolante, Pietro Maria Donisi, Annamaria Scattolin, Elena Maino, Rosaria Sancetta, Piera Viero, Renato Bassan
About one-half of all Burkitt lymphoma (BL) patients are younger than 40 years, and one-third belong to the adolescent and young adult (AYA) subset, defined by an age between 15 and 25-40 years, based on selection criteria used in different reports. BL is an aggressive B-cell neoplasm displaying highly characteristic clinico-diagnostic features, the biologic hallmark of which is a translocation involving immunoglobulin and c-MYC genes. It presents as sporadic, endemic, or epidemic disease. Endemicity is pathogenetically linked to an imbalance of the immune system which occurs in African children infected by malaria parasites and Epstein-Barr virus, while the epidemic form strictly follows the pattern of infection by HIV...
2017: Adolescent Health, Medicine and Therapeutics
https://www.readbyqxmd.com/read/28096236/inhibitory-effects-of-%C3%AE-and-%C3%AE-tocopherols-on-estrogen-stimulated-breast-cancer-in-vitro-and-in-vivo
#14
Min Ji Bak, Soumyasri Das Gupta, Joseph Wahler, Hong Jin Lee, Xiaowei Li, Mao-Jung Lee, Chung S Yang, Nanjoo Suh
Estrogens have been implicated as complete carcinogens for breast and other tissues through mechanisms involving increased cell proliferation, oxidative stress and DNA damage. Because of their potent antioxidant activity and other effects, tocopherols have been shown to exert anti-tumor activities in various cancers. However, limited information is available on the effect of different forms of tocopherols in estrogen-mediated breast cancer. To address this, we examined the effects of α-, γ- and δ-tocopherols as well as a natural γ-tocopherol rich mixture of tocopherols, γ-TmT, on estrogen-stimulated MCF-7 cells in vitro and in vivo...
January 17, 2017: Cancer Prevention Research
https://www.readbyqxmd.com/read/28094768/bcl-w-has-a-fundamental-role-in-b-cell-survival-and-lymphomagenesis
#15
Clare M Adams, Annette S Kim, Ramkrishna Mitra, John K Choi, Jerald Z Gong, Christine M Eischen
Compromised apoptotic signaling is a prerequisite for tumorigenesis. The design of effective therapies for cancer treatment depends on a comprehensive understanding of the mechanisms that govern cell survival. The antiapoptotic proteins of the BCL-2 family are key regulators of cell survival and are frequently overexpressed in malignancies, leading to increased cancer cell survival. Unlike BCL-2 and BCL-XL, the closest antiapoptotic relative BCL-W is required for spermatogenesis, but was considered dispensable for all other cell types...
January 17, 2017: Journal of Clinical Investigation
https://www.readbyqxmd.com/read/28093659/clinical-and-molecular-relevance-of-mutant-allele-tumor-heterogeneity-in-breast-cancer
#16
Ding Ma, Yi-Zhou Jiang, Xi-Yu Liu, Yi-Rong Liu, Zhi-Ming Shao
PURPOSE: Intra-tumor heterogeneity (ITH) plays a pivotal role in driving breast cancer progression and therapeutic resistance. We used a mutant-allele tumor heterogeneity (MATH) algorithm to measure ITH and explored its correlation with clinical parameters and multi-omics data. METHODS: We assessed 916 female breast cancer patients from The Cancer Genome Atlas. We calculated the MATH values from whole-exome sequencing data and further investigated their correlation with clinical characteristics, somatic mutations, somatic copy number alterations (SCNAs), and gene enrichment...
January 16, 2017: Breast Cancer Research and Treatment
https://www.readbyqxmd.com/read/28093228/ndrg2-suppressed-expression-associates-with-poor-prognosis-in-pancreatic-cancer-is-hypermethylated-in-the-second-promoter-in-human-gastrointestinal-cancers
#17
Akihiro Yamamura, Koh Miura, Hideaki Karasawa, Fuyuhiko Motoi, Yasuhiko Mizuguchi, Yuriko Saiki, Shinichi Fukushige, Makoto Sunamura, Chikashi Shibata, Michiaki Unno, Akira Horii
Although N-myc downstream regulated gene 2 (NDRG2) is frequently downregulated in various cancers and is considered to be a candidate tumor suppressor gene, molecular mechanisms of the expressional suppression that lead to cancers are largely unknown. Recent studies indicated that epigenetic suppression of NDRG2 involved carcinogenesis and progression in several tumor types, and we demonstrated positive association with NDRG2 suppression and poor prognosis in pancreatic cancer. In this study, we analyzed mRNA and protein expressions of NDRG2 in 26 cancer cell lines (20 colorectal and 6 gastric cancers) and found that many cell lines showed variously reduced NDRG2 expressions...
January 13, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28093199/effect-of-different-cryo-devices-on-in-vitro-maturation-and-development-of-vitrified-warmed-immature-buffalo-oocytes
#18
Yelisetti Uma Mahesh, Henderson Rose Winnie Gibence, Sisinthy Shivaji, Brahmasani Sambasiva Rao
The aim of the study was to identify a cryo-device that would be best suited for the vitrification of buffalo immature cumulus-oocyte complexes (COCs) as judged by viability and meiotic competence of the vitrified-warmed oocytes and their development ability following in vitro fertilization (IVF). The expression of oocyte secreting factors and their receptors (GDF9, BMP15, BMPR2, TGFBR1) and apoptosis related genes (BCL2, BAX, P53, C-MYC) were compared in vitrified-warmed oocytes after in vitro maturation. COCs from the ovaries of slaughtered buffaloes were vitrified in a combination of dimethyl sulfoxide, ethylene glycol, and sucrose using either a conventional straw (CS), open pulled straw (OPS), cryoloop (CL), hemistraw (HS) or cryotop (CT)...
January 13, 2017: Cryobiology
https://www.readbyqxmd.com/read/28092679/genome-wide-analysis-of-p53-regulated-transcription-in-myc-driven-lymphomas
#19
C Tonelli, M J Morelli, A Sabò, A Verrecchia, L Rotta, T Capra, S Bianchi, S Campaner, B Amati
The tumour suppressor p53 is a transcription factor that controls cellular stress responses. Here, we dissected the transcriptional programmes triggered upon restoration of p53 in Myc-driven lymphomas, based on the integrated analysis of p53 genomic occupancy and gene regulation. p53 binding sites were identified at promoters and enhancers, both characterized by the pre-existence of active chromatin marks. Only a small fraction of these sites showed the 20 base-pair p53 consensus motif, suggesting that p53 recruitment to genomic DNA was primarily mediated through protein-protein interactions in a chromatin context...
January 16, 2017: Oncogene
https://www.readbyqxmd.com/read/28092674/a-targetable-hb-egf-cited4-axis-controls-oncogenesis-in-lung-cancer
#20
C-H Hsieh, Y-T Chou, M-H Kuo, H-P Tsai, J-L Chang, C-W Wu
Aberrant epidermal growth factor (EGF) receptor (EGFR) signaling contributes to neoplastic initiation and progression in lung. Mutated EGFR has become as an important therapeutic target in lung cancer, whereas targeted treatment is not available for wild-type EGFR or its ligands. In this study, we found that heparin-binding (HB)-EGF, a member of the EGF family, was highly expressed in a subset of lung cancer, proliferation of which was dependent on HB-EGF signaling. Silencing of HB-EGF with RNA interference inhibited cell cycle progression in lung cancer cells...
January 16, 2017: Oncogene
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