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https://www.readbyqxmd.com/read/28336971/targeting-to-the-non-genomic-activity-of-retinoic-acid-receptor-gamma-by-acacetin-in-hepatocellular-carcinoma
#1
Wenjun Zeng, Chunyun Zhang, Hongwei Cheng, Yun-Long Wu, Jie Liu, Zekun Chen, Jian-Gang Huang, Russell Erick Ericksen, Liqun Chen, Haiping Zhang, Alice Sze Tsai Wong, Xiao-Kun Zhang, Weiping Han, Jin-Zhang Zeng
We recently demonstrated that retinoic acid receptor-γ (RARγ) is overexpressed and acts as a tumor promoter in hepatocellular carcinoma (HCC). The oncogenic activity of RARγ is mainly attributed to its physiological interaction with p85α regulatory subunit of PI3K leading to constitutive activation of AKT. Here we report RARγ as a negative regulator of p53 signaling and thus extend the oncogenic potential of RARγ to a new role in controlling the balance between AKT and p53. A natural flavonoid acacetin is then identified to be capable of modulating RARγ-dependent AKT-p53 network...
March 23, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28331816/inhibition-of-fat-cell-differentiation-in-3t3-l1-pre-adipocytes-by-all-trans-retinoic-acid-integrative-analysis-of-transcriptomic-and-phenotypic-data
#2
Katharina Stoecker, Steffen Sass, Fabian J Theis, Hans Hauner, Michael W Pfaffl
The process of adipogenesis is controlled in a highly orchestrated manner, including transcriptional and post-transcriptional events. In developing 3T3-L1 pre-adipocytes, this program can be interrupted by all-trans retinoic acid (ATRA). To examine this inhibiting impact by ATRA, we generated large-scale transcriptomic data on the microRNA and mRNA level. Non-coding RNAs such as microRNAs represent a field in RNA turnover, which is very important for understanding the regulation of mRNA gene expression. High throughput mRNA and microRNA expression profiling was performed using mRNA hybridisation microarray technology and multiplexed expression assay for microRNA quantification...
March 2017: Biomolecular Detection and Quantification
https://www.readbyqxmd.com/read/28322443/all-trans-retinoic-acid-ameliorates-hepatic-stellate-cell-activation-via-suppression-of-thioredoxin-interacting-protein-expression
#3
Hiroki Shimizu, Toshiaki Tsubota, Keita Kanki, Goshi Shiota
Activation of hepatic stellate cells (HSCs) is the effector factor of hepatic fibrosis and hepatocellular carcinoma (HCC) development. Accumulating evidence suggests that retinoic acids (RAs), derivatives of vitamin A, contribute to prevention of liver fibrosis and carcinogenesis, however, regulatory mechanisms of RAs still remain exclusive. To elucidate RA signaling pathway, we previously performed a genome-wide screening of RA-responsive genes by in silico analysis of RA-response elements, and identified 26 RA-responsive genes...
March 21, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28322237/characteristics-and-outcome-of-patients-with-therapy-related-acute-promyelocytic-leukemia-front-line-treated-with-or-without-arsenic-trioxide
#4
S Kayser, J Krzykalla, M A Elliott, K Norsworthy, P Gonzales, R K Hills, M R Baer, Z Ráčil, J Mayer, J Novak, P Žák, T Szotkowski, D Grimwade, N H Russell, R B Walter, E H Estey, J Westermann, M Görner, A Benner, A Krämer, B D Smith, A K Burnett, C Thiede, C Röllig, A D Ho, G Ehninger, R F Schlenk, M S Tallman, M J Levis, U Platzbecker
Therapy-related acute promyelocytic leukemia (t-APL) is relatively rare, with limited data on outcome after treatment with arsenic trioxide (ATO) compared to standard intensive chemotherapy (CTX). We evaluated 103 adult t-APL patients undergoing treatment with all-trans retinoic acid (ATRA) alone (n=7) or in combination with ATO (n=24), CTX (n=53), or both (n=19). Complete remissions were achieved after induction therapy in 57% with ATRA, 100% with ATO/ATRA, 78% with CTX/ATRA, and 95% with CTX/ATO/ATRA. Early death rates were 43% for ATRA, 0% for ATO/ATRA, 12% for CTX/ATRA, and 5% for CTX/ATO/ATRA...
March 21, 2017: Leukemia: Official Journal of the Leukemia Society of America, Leukemia Research Fund, U.K
https://www.readbyqxmd.com/read/28293819/characteristics-features-and-factors-influencing-early-death-in-acute-promyelocytic-leukemia-experience-from-united-arab-emirates-uae
#5
Inaam Bashir Hassan, Mariam R Al Zaabi, Arif Alam, Mohammed Jawad Hashim, Martin S Tallman, Jorgen Kristensen
Although acute promyelocytic leukemia (APL) is a curable hematologic malignancy, early death (ED) remains a significant cause of treatment failure especially in developing countries. In a retrospective data analysis of 67 adult APL patients diagnosed in United Arab Emirates we report an ED rate of 11.9% which is comparable to that reported from more developed countries. We identified the following parameters at presentation as significant predictor of increased ED: Age >40 years (P = 0.015), fever (P = 0...
March 14, 2017: International Journal of Hematology
https://www.readbyqxmd.com/read/28291070/florid-neovascularization-of-the-retina-in-a-diabetic-patient-undergoing-induction-and-consolidation-therapy-for-acute-promyelocytic-leukemia
#6
John R Rocke, J Ben Clark, Philip J Campbell, Emil Kurniawan
PURPOSE: To report on a 39-year-old gentleman with a background of Type 2 diabetes mellitus who was diagnosed with acute promyelocytic leukemia (APL), which was treated by all-trans retinoic acid (ATRA), and subsequently developed bilateral neovascularization of the disk (NVD). METHODS: Ophthalmic examination and investigation including fundus photography and fluorescein angiography. RESULTS: Three months after commencement of ATRA therapy, the patient was found to have florid bilateral NVD with adjacent preretinal and intraretinal hemorrhages...
March 13, 2017: Retinal Cases & Brief Reports
https://www.readbyqxmd.com/read/28282589/lower-concentrations-of-receptor-for-advanced-glycation-end-products-and-epiregulin-in-amniotic-fluid-correlate-to-chemically-induced-cleft-palate-in-mice
#7
Xinhuan Wang, Jingjing Zhu, Yanjun Fang, Zhuan Bian, Liuyan Meng
This study investigated the correlation between differentially expressed proteins in amniotic fluid (AF) and cleft palate induced by all-trans retinoic acid (atRA), and 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in mice. Seven proteins were differentially expressed at embryonic day (E) 16.5 in atRA and control groups as revealed by label-based mouse antibody array. Enzyme-linked immunosorbent assay was further used to detect the expression levels of these proteins in AF from E13.5 to E16.5 in atRA, TCDD, and control groups...
February 28, 2017: Environmental Toxicology and Pharmacology
https://www.readbyqxmd.com/read/28276286/arsenic-trioxide-and-all-trans-retinoic-acid-selectively-exert-synergistic-cytotoxicity-against-flt3-itd-aml-cells-via-co-inhibition-of-flt3-signaling-pathways
#8
Li-Na Wang, Yan-Lai Tang, Yin-Chuan Zhang, Zu-Han Zhang, Xiao-Jian Liu, Zhi-Yong Ke, Yu Li, Hui-Zhen Tan, Li-Bin Huang, Xue-Qun Luo
FLT3-ITD mutations occur in approximately 30% of acute myeloid leukemia (AML) and are associated with a poor outcome. Currently available FLT3 inhibitors have in vitro but limited clinical activity in FLT3-ITD AML. Reports have shown that an arsenic trioxide (ATO)/all-trans-retinoic acid (ATRA) combination improves prognosis in acute promyelocytic leukemia, especially with FLT3-ITD, and ATO or ATRA alone enhances apoptosis in FLT3-ITD AML cells treated with FLT3 inhibitors, providing a rationale to investigate the role of ATO/ATRA in FLT3-ITD AML...
March 9, 2017: Leukemia & Lymphoma
https://www.readbyqxmd.com/read/28275201/physiologically-based-pharmacokinetic-model-of-all-trans-retinoic-acid-with-application-to-cancer-populations-and-drug-interactions
#9
Jing Jing, Cara Nelson, Jisun Paik, Yoshiyuki Shirasaka, John K Amory, Nina Isoherranen
All-trans retinoic acid (atRA) is a front-line treatment for acute promyelocytic leukemia (APL). Due to its activity in regulating the cell cycle, it has also been evaluated for the treatment of other cancers. However, the efficacy of atRA has been limited by atRA inducing its own metabolism during therapy, resulting in a decrease of atRA exposure during continuous dosing. Frequent relapse occurs in patients receiving atRA monotherapy. In an attempt to combat therapy resistance, inhibitors of atRA metabolism have been developed...
March 8, 2017: Journal of Pharmacology and Experimental Therapeutics
https://www.readbyqxmd.com/read/28264352/the-jumping-plant-lice-of-the-neotropical-genus-i-tainarys-i-hemiptera-psylloidea-associated-with-anacardiaceae
#10
Daniel Burckhardt, Dalva L Queiroz
The Neotropical psyllid genus Tainarys Brèthes, 1920 is revised to include 14 extant and one fossil species from Dominican amber. Eight species are described as new, viz. Tainarys aroeira sp. nov., T. atra sp. nov., T. hapla sp. nov., T. myracrodrui sp. nov., T. nigricornis sp. nov., T. didyma sp. nov. and T. orientalis sp. nov. from Brazil, the last two also from Uruguay, as well as T. lozadai sp. nov. from Peru. The fifth instar immatures are described for nine species. †Vicinilura Klimaszewski, 1996, erected for the fossil †V...
February 20, 2017: Zootaxa
https://www.readbyqxmd.com/read/28263888/combined-venomics-antivenomics-and-venom-gland-transcriptome-analysis-of-the-monocoled-cobra-naja-kaouthia-from-china
#11
Ning Xu, Hong-Yan Zhao, Yin Yin, Shan-Shan Shen, Lin-Lin Shan, Chuan-Xi Chen, Yan-Xia Zhang, Jian-Fang Gao, Xiang Ji
We conducted an omics-analysis of the venom of Naja kaouthia from China. Proteomics analysis revealed six protein families [three-finger toxins (3-FTx), phospholipase A2 (PLA2), nerve growth factor, snake venom metalloproteinase (SVMP), cysteine-rich secretory protein and ohanin], and venom-gland transcriptomics analysis revealed 28 protein families from 79 unigenes. 3-FTx (56.5% in proteome/82.0% in transcriptome) and PLA2 (26.9%/13.6%) were identified as the most abundant families in venom proteome and venom-gland transcriptome...
March 3, 2017: Journal of Proteomics
https://www.readbyqxmd.com/read/28262728/chemical-or-genetic-pin1-inhibition-exerts-potent-anticancer-activity-against-hepatocellular-carcinoma-by-blocking-multiple-cancer-driving-pathways
#12
Xin-Hua Liao, Arina Li Zhang, Min Zheng, Mei-Qing Li, Champ Peng Chen, Huijuan Xu, Qing-Song Chu, Dayun Yang, Wenxian Lu, Ting-Fen Tsai, Hekun Liu, Xiao Zhen Zhou, Kun Ping Lu
Hepatocellular carcinoma (HCC) is one of the most prevalent and malignant cancers with high inter- and intra-tumor heterogeneity. A central common signaling mechanism in cancer is proline-directed phosphorylation, which is further regulated by the unique proline isomerase Pin1. Pin1 is prevalently overexpressed in human cancers including ~70% of HCC, and promotes tumorigenesis by activating multiple cancer-driving pathways. However, it was challenging to evaluate the significance of targeting Pin1 in cancer treatment until the recent identification of all-trans retinoic acid (ATRA) as a Pin1 inhibitor...
March 6, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28244006/neurogenesis-in-response-to-synthetic-retinoids-at-different-temporal-scales
#13
Hesham Haffez, Thabat Khatib, Peter McCaffery, Stefan Przyborski, Christopher Redfern, Andrew Whiting
All-trans retinoic acid (ATRA) plays key roles in neurogenesis mediated by retinoic acid receptors (RARs). RARs are important targets for the therapeutic regulation of neurogenesis but effective drug development depends on modelling-based strategies to design high-specificity ligands in combination with good biological assays to discriminate between target-specificity and off-target effects. Using neuronal differentiation as a model, the aim of this study was to test the hypothesis that responses across different temporal scales and assay platforms can be used as comparable measures of retinoid activity...
February 27, 2017: Molecular Neurobiology
https://www.readbyqxmd.com/read/28242222/topographic-and-geomorphologic-controls-on-the-distribution-of-vegetation-formations-in-elephant-point-livingston-island-maritime-antarctica
#14
Jesús Ruiz-Fernández, Marc Oliva, Cristina García-Hernández
This article focuses on the spatial distribution of vegetation formations in Elephant Point, an ice-free area of 1.16km(2) located in Livingston Island (South Shetland Islands, Antarctica). Fieldwork carried out in January 2014 consisted of floristic surveys and designation of a vegetation map. We have examined these data in a GIS environment together with topographical and geomorphological features existing in the peninsula in order to infer the factors controlling vegetation distribution. This has allowed quantifying the total area covered by the four different vegetation formations distributed across the peninsula, proliferating mainly on bedrock plateaus and Holocene raised beaches...
February 24, 2017: Science of the Total Environment
https://www.readbyqxmd.com/read/28228611/anti-diabetic-action-of-all-trans-retinoic-acid-and-the-orphan-g-protein-coupled-receptor-gprc5c-in-pancreatic-%C3%AE-cells
#15
Stefan Amisten, Israa Mohammad Al-Amily, Arvind Soni, Ross Hawkes, Patricio Atanes, Shanta Jean Persaud, Patrik Rorsman, Albert Salehi
Pancreatic islets express high levels of the orphan G-protein coupled receptor C5C (GPRC5C), the function of which remains to be established. Here we have examined the role of GPRC5C in the regulation of insulin secretion and β-cell survival and proliferation using human and mouse pancreatic islets. The expression of GPRC5C was analysed by RNA-sequencing, qPCR, western blotting and confocal microscopy. Insulin secretion and cell viability were determined by RIA and MTS assays, respectively. GPRC5C mRNA expression and protein level were reduced in the islets from type-2 diabetic donors...
February 22, 2017: Endocrine Journal
https://www.readbyqxmd.com/read/28218902/retinoic-acid-directs-breast-cancer-cell-state-changes-through-regulation-of-tet2-pkc%C3%AE-pathway
#16
M-J Wu, M R Kim, Y-S Chen, J-Y Yang, C-J Chang
The key molecular mechanism governing the cancer cell state (stem cell-like state vs differentiation state) to control the cancer stem cell (CSC) pool remains elusive. This study provides the first evidence showing that all-trans retinoic acid (ATRA) induces the interaction and chromatin recruitment of a novel RARβ-TET2 complex to epigenetically activate a specific cohort of gene targets, including MiR-200c. TET2-activated miR-200c further targets and suppresses PKCζ, a cell polarity protein that has a pivotal role in directing asymmetric division of mammalian stem cells to sustain the stem cell pool...
February 20, 2017: Oncogene
https://www.readbyqxmd.com/read/28216044/radiolabeling-and-initial-biological-evaluation-of-18-f-kbm-1-for-imaging-rar-%C3%AE-receptors-in-neuroblastoma
#17
Kiran Kumar Solingapuram Sai, Bhaskar C Das, Anirudh Sattiraju, Frankis G Almaguel, Suzanne Craft, Akiva Mintz
Retinoic acid receptor alpha (RAR-α) plays a significant role in a number of diseases, including neuroblastoma. Children diagnosed with high-risk neuroblastoma are treated13-cis-retinoic acid, which reduces risk of cancer recurrence. Neuroblastoma cell death is mediated via RAR-α, and expression of RAR-α is upregulated after treatment. A molecular imaging probe that binds RAR-α will help clinicians to diagnose and stratify risk for patients with neuroblastoma, who could benefit from retinoid-based therapy...
February 1, 2017: Bioorganic & Medicinal Chemistry Letters
https://www.readbyqxmd.com/read/28215943/all-trans-retinoic-acid-enhances-gemcitabine-cytotoxicity-in-human-pancreatic-cancer-cell-line-aspc-1-by-up-regulating-protein-expression-of-deoxycytidine-kinase
#18
Hiroki Kuroda, Masanori Tachikawa, Yasuo Uchida, Koetsu Inoue, Hideo Ohtsuka, Sumio Ohtsuki, Michiaki Unno, Tetsuya Terasaki
We previously showed that gemcitabine resistance in pancreatic cancer chemotherapy correlates with suppressed expression of deoxycytidine kinase (dCK), which catalyzes the rate-limiting step of gemcitabine activation. The purpose of the present study was to find a drug that might be useful to enhance the cytotoxicity of gemcitabine by increasing dCK expression in gemcitabine-resistant human pancreatic cancer cell line AsPC-1. Screening of 40 prescription drugs identified 35 with no intrinsic cytotoxicity towards AsPC-1 cells...
February 12, 2017: European Journal of Pharmaceutical Sciences
https://www.readbyqxmd.com/read/28211306/ex-vivo-all-trans-retinoic-acid-modulates-no-production-and-regulates-il-6-effect-during-rheumatoid-arthritis-a-study-in-algerian-patients
#19
Amina Arroul-Lammali, Fadia Rahal, Radia Chetouane, Zineb Djeraba, Oussama Medjeber, Aicha Ladjouze-Rezig, Chafia Touil-Boukoffa
Rheumatoid arthritis (RA) is a chronic autoimmune disease. The pathophysiology of RA implicates several mediators such as nitric oxide (NO) and cytokines such as interleukin-6 (IL-6), which is deeply involved in the main characteristics of RA. Furthermore, all-trans retinoic acid (ATRA) is an active vitamin A derivative well-known to have diverse immunomodulatory actions. In our study, we investigated first, the ex vivo immunomodulatory potential of ATRA on NO pathway by peripheral blood mononuclear cells (PBMCs) from Algerian RA patients...
April 2017: Immunopharmacology and Immunotoxicology
https://www.readbyqxmd.com/read/28195896/contributing-factors-for-complications-and-outcomes-in-patients-with-snakebite-experience-in-a-medical-center-in-southern-taiwan
#20
Yu-Hsuan Hsieh, Jung-Hua Hsueh, Wen-Chung Liu, Kuo-Chung Yang, Kuei-Chang Hsu, Cheng-Ta Lin, Yen-Yi Ho, Lee-Wei Chen
OBJECTIVES: Snakebite usually results in various complications, such as significant soft tissue damage, infection, hematological, and neurological deficit. Surgical intervention, usually, is indicated in patients with tissue necrosis, infection, and compartment syndrome. To identify the contributing factors for complications and outcomes in different patients with snakebite so that outcomes can be evaluated and treatment of such patients can be initiated at the earliest. METHODS: Information was collected regarding age, sex, underlying disease, species of snake, and the course of treatment of the victims of snakebite who visited the emergency department of a medical center in southern Taiwan between 2004 and 2014...
March 2017: Annals of Plastic Surgery
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