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https://www.readbyqxmd.com/read/28544358/the-expression-pattern-of-bcl11a-mdm2-and-pten-genes-in-b-cell-acute-lymphoblastic-leukemia
#1
Ling Xu, Hong Wu, Xiuli Wu, Yangqiu Li, Dongmei He
AIM: Bcl11a is closely associated with B-cell lymphoma and B-cell chronic lymphocytic leukemia. However, little is known about the expression character of Bcl11a gene in B-cell acute lymphoblastic leukemia (B-ALL). In previous study, our results showed there was a clear dysregulation in the global gene expression of the Bcl11a-suppressed B lymphoma cells. The aim of the study is to further evaluate the role of Bcl11a and the expression level of its related genes Mdm2, Pten in B-ALL patients...
May 24, 2017: Asia-Pacific Journal of Clinical Oncology
https://www.readbyqxmd.com/read/28544069/cd38-enhances-the-proliferation-and-inhibits-the-apoptosis-of-cervical-cancer-cells-by-affecting-the-mitochondria-functions
#2
Shan Liao, Songshu Xiao, Hongxiang Chen, Manying Zhang, Zhifang Chen, Yuehua Long, Lu Gao, Guangchao Zhu, Junyu He, Shuping Peng, Wei Xiong, Zhaoyang Zeng, Zheng Li, Ming Zhou, Xiaoling Li, Jian Ma, Minghua Wu, Juanjuan Xiang, Guiyuan Li, Yanhong Zhou
Cervical cancer is one of the most common malignant tumors in women all over the world. The exact mechanism of occurrence and development of cervical cancer has not been fully elucidated. CD38 is a type II transmembrane glycoprotein, which was found to mediate diverse activities, including signal transduction, cell adhesion, and cyclic ADP-ribose synthesis. Here, we reported that CD38 promoted cell proliferation and inhibited cell apoptosis in cervical cancer cells by affecting the mitochondria functions. We established stable cervical cancer cell lines with CD38 over-expressed...
May 23, 2017: Molecular Carcinogenesis
https://www.readbyqxmd.com/read/28542136/pak4-regulates-g6pd-activity-by-p53-degradation-involving-colon-cancer-cell-growth
#3
Xiumei Zhang, Xia Zhang, Yang Li, Yangguang Shao, Jianying Xiao, Ge Zhu, Feng Li
The p21-activated kinase 4 (PAK4) is overexpressed in different cancers and promotes proliferation of cancer cells. Reprogramming of glucose metabolism is found in most cancer cells which in turn supports rapid proliferation. However, the relationship between PAK4 and glucose metabolism in cancer cells has not been explored. In this study, we reported that PAK4 promoted glucose intake, NADPH production and lipid biosynthesis, leading to an increased proliferation of colon cancer cells. Mechanistically, PAK4 interacted with glucose-6-phosphate dehydrogenase (G6PD), a rate-limiting enzyme of the pentose phosphate pathway and increased G6PD activity via enhancing Mdm2-mediated p53 ubiquitination degradation...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28542129/adar1-mediated-3-utr-editing-and-expression-control-of-antiapoptosis-genes-fine-tunes-cellular-apoptosis-response
#4
Chang-Ching Yang, Yi-Tung Chen, Yi-Feng Chang, Hsuan Liu, Yu-Ping Kuo, Chieh-Tien Shih, Wei-Chao Liao, Hui-Wen Chen, Wen-Sy Tsai, Bertrand Chin-Ming Tan
Adenosine-to-inosine RNA editing constitutes a crucial component of the cellular transcriptome and critically underpins organism survival and development. While recent high-throughput approaches have provided comprehensive documentation of the RNA editome, its functional output remains mostly unresolved, particularly for events in the non-coding regions. Gene ontology analysis of the known RNA editing targets unveiled a preponderance of genes related to apoptosis regulation, among which proto-oncogenes XIAP and MDM2 encode two the most abundantly edited transcripts...
May 25, 2017: Cell Death & Disease
https://www.readbyqxmd.com/read/28539160/phosphorylation-of-p53-at-threonine-155-is-required-for-jab1-mediated-nuclear-export-of-p53
#5
Eun-Woo Lee, Wonkyung Oh, Hosung Paul Song, Won Kon Kim
The Jun activation-domain binding protein 1 (Jab1) induces p53 nuclear export and cytoplasmic degradation. However, the underlying mechanism is not clearly addressed. Here, we identify that phosphorylation at threonine 155 residue is indispensable for Jab1-mediated p53 nuclear export. Jab1 stimulated phosphorylation of p53 at T155, which was inhibited by curcumin, an inhibitor of COP9 signalosome (CSN)-associated kinases. T155E mutant, which mimics phosphorylated p53, exhibited spontaneous cytoplasmic localization in the absence of Jab1...
May 25, 2017: BMB Reports
https://www.readbyqxmd.com/read/28535015/the-circadian-clock-gene-per2-plays-an-important-role-in-tumor-suppression-through-regulating-tumor-associated-genes-in-human-oral-squamous-cell-carcinoma
#6
Xiaoli Su, Dan Chen, Kai Yang, Qin Zhao, Dan Zhao, Xiaoqiang Lv, Yiran Ao
Low expression of the clock gene PER2 is closely related to carcinogenesis and the development of cancer; however, the mechanism of the low expression of PER2 that led to cell malignant transformation remains unclear. This study used RNA interference (RNAi) technology to silence PER2 in SCC15 human oral squamous cell carcinoma (OSCC) cells. Then it was found that the ability of cancer cell proliferation, migration, and invasion were markedly increased (P<0.05), and the ability of cancer cell apoptosis and the number of cells in G1/G0 phase were markedly reduced (P<0...
May 19, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28533414/manipulating-dna-damage-response-signaling-for-the-treatment-of-immune-mediated-diseases
#7
Jonathan P McNally, Scott H Millen, Vandana Chaturvedi, Nora Lakes, Catherine E Terrell, Eileen E Elfers, Kaitlin R Carroll, Simon P Hogan, Paul R Andreassen, Julie Kanter, Carl E Allen, Michael M Henry, Jay N Greenberg, Stephan Ladisch, Michelle L Hermiston, Michael Joyce, David A Hildeman, Jonathan D Katz, Michael B Jordan
Antigen-activated lymphocytes undergo extraordinarily rapid cell division in the course of immune responses. We hypothesized that this unique aspect of lymphocyte biology leads to unusual genomic stress in recently antigen-activated lymphocytes and that targeted manipulation of DNA damage-response (DDR) signaling pathways would allow for selective therapeutic targeting of pathological T cells in disease contexts. Consistent with these hypotheses, we found that activated mouse and human T cells display a pronounced DDR in vitro and in vivo...
May 22, 2017: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/28511869/markers-of-the-p53-pathway-further-refine-molecular-profiling-in-high-risk-endometrial-cancer-a-transportec-initiative
#8
R J Edmondson, E J Crosbie, M Nickkho-Amiry, A Kaufmann, E Stelloo, H W Nijman, A Leary, A Auguste, L Mileshkin, P Pollock, H J MacKay, M E Powell, T Bosse, C L Creutzberg, H C Kitchener
BACKGROUND: The morphological classification of high-risk endometrial cancer is of limited prognostic value. Recent attempts to stratify tumours according to molecular signatures have shown considerable promise. Here we attempted to further refine molecular classifications using markers of the p53 pathway. METHODS: We analysed the expression of p53 as well as three downstream markers of the p53 pathway, p21, mdm2 and phospho-p63 (pp63), by immunohistochemistry in a series of 114 endometrial cancers (86 endometrioid, 28 non-endometrioid subtype) with high-risk features (such as high tumour grade and deep myometrial invasion) and correlated results with clinical outcome...
May 13, 2017: Gynecologic Oncology
https://www.readbyqxmd.com/read/28508227/the-mdm2-promoter-t309g-polymorphism-was-associated-with-preeclampsia-susceptibility
#9
Saeedeh Salimi, Abbas Mohammadpour-Gharehbagh, Mahnaz Rezaei, Mojtaba Sajadian, Batool Teimoori, Atefeh Yazdi, Mojgan Mokhtari, Minoo Yaghmaei
PURPOSE: Preeclampsia (PE) is a hypertensive disorder of pregnancy in which abnormal proliferation and apoptosis of placenta trophoblast has a pivotal role in its pathophysiology. The aim of the current study was to examine the association between Mouse Double Minute 2 (MDM2) T309G and 40 bp insertion/deletion (I/D) polymorphisms and PE risk. METHODS: A case-control study was conducted on 208 PE women and 164 healthy pregnant women matching age, sex, and ethnicity...
May 15, 2017: Journal of Assisted Reproduction and Genetics
https://www.readbyqxmd.com/read/28507478/melatonin-regulates-the-aging-mouse-hippocampal-homeostasis-via-the-sirtuin1-foxo1-pathway
#10
Anorut Jenwitheesuk, Parichart Boontem, Prapimpun Wongchitrat, Jiraporn Tocharus, Sujira Mukda, Piyarat Govitrapong
Sirtuin1 (SIRT1) and forkhead box transcription factor O subfamily 1 (FOXO1) play vital roles in the maintenance of hippocampal neuronal homeostasis during aging. Our previous study showed that melatonin, a hormone mainly secreted by the pineal gland, restored the impaired memory of aged mice. Age-related neuronal energy deficits contribute to the pathogenesis of several neurodegenerative disorders. An attempt has been made to determine whether the effect of melatonin is mediated through the SIRT1-FOXO1 pathways...
2017: EXCLI journal
https://www.readbyqxmd.com/read/28504589/analysis-of-saliva-gene-expression-during-head-and-neck-cancer-radiotherapy-a-pilot-study
#11
Jerome Lacombe, Carla Brooks, Chengcheng Hu, Emmanuel Menashi, Ronald Korn, Farley Yang, Frederic Zenhausern
Saliva, a biological fluid, is a promising candidate for novel approaches to prognosis, clinical diagnosis, monitoring and management of patients with both oral and systemic diseases. However, to date, saliva has not been widely investigated as a biomarker for radiation exposure. Since white blood cells are also present in saliva, it should theoretically be possible to investigate the transcriptional biomarkers of radiation exposure classically studied in whole blood. Therefore, we collected whole blood and saliva samples from eight head and neck cancer patients before the start of radiation treatment, at mid-treatment and after treatment...
May 15, 2017: Radiation Research
https://www.readbyqxmd.com/read/28499267/a-novel-germline-tp53-mutation-p-pro190arg-detected-in-a-patient-with-lung-and-bilateral-breast-cancers
#12
Małgorzata Krześniak, Dorota Butkiewicz, Jadwiga Rachtan, Iwona Matuszczyk, Ewa Grzybowska, Marek Rusin
PURPOSE: Li-Fraumeni syndrome (LFS) is a rare genetic disease with strong predispositions to multiple early-onset neoplasms, mostly sarcomas, breast cancers, brain tumors and adrenocortical carcinomas (LFS core cancers). In most LFS families the germline mutations of TP53 tumor suppressor gene were found. Lung cancer does not belong to the core cancers of LFS, however its higher incidence is observed in families with TP53 mutations. Our aim was to search for TP53 mutations in female lung cancer patients whose clinico-demographic characteristics suggested a probable genetic predisposition to the disease...
May 9, 2017: Advances in Medical Sciences
https://www.readbyqxmd.com/read/28498808/restoration-of-p53-using-the-novel-mdm2-p53-antagonist-apg115-suppresses-dedifferentiated-papillary-thyroid-cancer-cells
#13
Haibo Chen, Dingyuan Luo, Lin Zhang, Xiaofeng Lin, Qiuyun Luo, Hanjie Yi, Jing Wang, Xianglei Yan, Baoxia Li, Yuelei Chen, Xingguang Liu, Hong Zhang, Sheng Liu, Miaozhen Qiu, Dajun Yang, Ningyi Jiang
Dedifferentiated papillary thyroid cancer (DePTC) is characterized by aggressive growth, recurrence, distant metastasis, and resistance to radioactive iodine (RAI) therapy. DePTC is also accompanied by poor prognosis and high early-mortality. Nevertheless, most DePTC cells show intact p53 downstream functionality. In cells with wild-type p53, the murine double minute2 (MDM2) protein interacts with p53 and abrogates its activity. Inhibition of the MDM2-p53 interaction restores p53 activity and leads to cell cycle arrest and apoptosis...
April 24, 2017: Oncotarget
https://www.readbyqxmd.com/read/28498468/microrna-379-5p-plays-a-tumor-suppressive-role-in-human-bladder-cancer-growth-and-metastasis-by-directly-targeting-mdm2
#14
Deyao Wu, Xiaobing Niu, Jun Tao, Pengchao Li, Qiang Lu, Aiming Xu, Wei Chen, Zengjun Wang
Bladder cancer is the second most common urological malignancy in the US and is the most frequently diagnosed urological malignancy in China. An increasing amount of evidence indicates that microRNAs perform extremely important functions in many biological processes related to the formation and progression of cancers, including bladder cancer. Previous studies have reported that microRNA‑379-5p (miR-379-5p) is involved in tumour initiation and development in human cancers. However, the expression pattern, biological functions and the underlying mechanisms of miR-379-5p in bladder cancer remain unknown...
April 27, 2017: Oncology Reports
https://www.readbyqxmd.com/read/28496125/enhancing-specific-disruption-of-intracellular-protein-complexes-by-hydrocarbon-stapled-peptides-using-lipid-based-delivery
#15
D Thean, J S Ebo, T Luxton, Xue'Er Cheryl Lee, T Y Yuen, F J Ferrer, C W Johannes, D P Lane, C J Brown
Linear peptides can mimic and disrupt protein-protein interactions involved in critical cell signaling pathways. Such peptides however are usually protease sensitive and unable to engage with intracellular targets due to lack of membrane permeability. Peptide stapling has been proposed to circumvent these limitations but recent data has suggested that this method does not universally solve the problem of cell entry and can lead to molecules with off target cell lytic properties. To address these issues a library of stapled peptides was synthesized and screened to identify compounds that bound Mdm2 and activated cellular p53...
May 11, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28494701/spindle-cell-lipoma-in-dogs
#16
Giancarlo Avallone, Valeria Pellegrino, Luisa V Muscatello, Giuseppe Sarli, Paola Roccabianca
Spindle cell lipoma (SCL) is a benign neoplasm of the adipose tissue that may resemble an undifferentiated soft tissue sarcoma (STS). This report describes the histopathological features of 6 SCLs in dogs. All SCLs were located in the subcutis and were composed of bland, occasionally vacuolated spindle cells intermixed with ropey collagen and myxoid matrix. Sudan IV stain performed in 1 case demonstrated the lipid content of vacuoles. Mature adipocytes represented less than 10% of the neoplasm in 3 cases and were absent in the remaining 3...
January 1, 2017: Veterinary Pathology
https://www.readbyqxmd.com/read/28490664/inhibiting-the-oncogenic-translation-program-is-an-effective-therapeutic-strategy-in-multiple-myeloma
#17
Salomon Manier, Daisy Huynh, Yu J Shen, Jia Zhou, Timur Yusufzai, Karma Z Salem, Richard Y Ebright, Jiantao Shi, Jihye Park, Siobhan V Glavey, William G Devine, Chia-Jen Liu, Xavier Leleu, Bruno Quesnel, Catherine Roche-Lestienne, John K Snyder, Lauren E Brown, Nathanael Gray, James Bradner, Luke Whitesell, John A Porco, Irene M Ghobrial
Multiple myeloma (MM) is a frequently incurable hematological cancer in which overactivity of MYC plays a central role, notably through up-regulation of ribosome biogenesis and translation. To better understand the oncogenic program driven by MYC and investigate its potential as a therapeutic target, we screened a chemically diverse small-molecule library for anti-MM activity. The most potent hits identified were rocaglate scaffold inhibitors of translation initiation. Expression profiling of MM cells revealed reversion of the oncogenic MYC-driven transcriptional program by CMLD010509, the most promising rocaglate...
May 10, 2017: Science Translational Medicine
https://www.readbyqxmd.com/read/28484902/the-molecular-mechanisms-of-protective-role-of-se-on-the-g2-m-phase-arrest-of-jejunum-caused-by-afb1
#18
Jing Fang, Heng Yin, Zhixiang Zheng, Panpan Zhu, Xi Peng, Zhicai Zuo, Hengmin Cui, Yi Zhou, Ping Ouyang, Yi Geng, Junliang Deng
Aflatoxin B1 (AFB1) is the most toxic among the mycotoxins and causes detrimental health effects on human and animals. Selenium (Se) plays an important role in chemopreventive, antioxidant, anticarcinogen, and detoxification and involved in cell cycle regulation. The aim of this study was to explore the molecular mechanisms of selenium involved in inhibition of G2/M cell cycle arrest of broiler's jejunum. A total of 240 one-day-old healthy Cobb broilers were randomly divided into four groups and fed with basal diet (control group), 0...
May 9, 2017: Biological Trace Element Research
https://www.readbyqxmd.com/read/28484602/ppimpred-a-web-server-for-high-throughput-screening-of-small-molecules-targeting-protein-protein-interaction
#19
Tanmoy Jana, Abhirupa Ghosh, Sukhen Das Mandal, Raja Banerjee, Sudipto Saha
PPIMpred is a web server that allows high-throughput screening of small molecules for targeting specific protein-protein interactions, namely Mdm2/P53, Bcl2/Bak and c-Myc/Max. Three different kernels of support vector machine (SVM), namely, linear, polynomial and radial basis function (RBF), and two other machine learning techniques including Naive Bayes and Random Forest were used to train the models. A fivefold cross-validation technique was used to measure the performance of these classifiers. The RBF kernel of SVM outperformed and/or was comparable with all other methods with accuracy values of 83%, 79% and 90% for Mdm2/P53, Bcl2/Bak and c-Myc/Max, respectively...
April 2017: Royal Society Open Science
https://www.readbyqxmd.com/read/28483982/akt3-is-responsible-for-the-survival-and-proliferation-of-embryonic-stem-cells
#20
Ling Wang, Delun Huang, Zongliang Jiang, Yan Luo, Carol Norris, Ming Zhang, Xiuchun Tian, Young Tang
The phosphatidylinositol 3-kinase (PI3K)/protein kinase B (PKB/Akt) pathway plays an important role in regulating cell proliferation, metabolism, and survival. However, the distinct roles of Akt isoforms - Akt1, Akt2, and Akt3 in pluripotent stem cell maintenance are not fully defined. Using mouse embryonic stem cells (ESCs), we show that direct inhibition of Akt activity leads to ESC apoptosis. The Akt3, but not Akt1 or Akt2 activity specifically regulates this effect. Inhibiting Akt3 also leads to a cell cycle arrest at G1 phase...
May 8, 2017: Biology Open
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