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https://www.readbyqxmd.com/read/28218902/retinoic-acid-directs-breast-cancer-cell-state-changes-through-regulation-of-tet2-pkc%C3%AE-pathway
#1
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
#2
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-aspc1-by-up-regulating-protein-expression-of-deoxycytidine-kinase
#3
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 AsPC1. Screening of 40 prescription drugs identified 35 with no intrinsic cytotoxicity towards AsPC1 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
#4
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
#5
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...
February 14, 2017: Annals of Plastic Surgery
https://www.readbyqxmd.com/read/28194055/treatment-of-acute-promyelocytic-leukemia-with-single-agent-arsenic-trioxide-experience-from-a-tertiary-care-center-in-india
#6
Karthik Udupa, Joseph Thomas, Chethana Babu Udupa, V S Binu, Prahlad Sharan
APML is a highly curable hematological malignancy which is treated with differentiation agents and chemotherapy. The morbidity caused by chemotherapy in the treatment of APML is a great cause of concern. We treated 12 patients with newly diagnosed APML with single agent arsenic trioxide between 2010 and 2014 irrespective of risk stratification. Out of 12 patient 2 patients died during induction. All the ten patients who completed induction, completed their consolidation and maintenance without any delays. One out of these ten patients relapsed 10 months after treatment...
March 2017: Indian Journal of Hematology & Blood Transfusion
https://www.readbyqxmd.com/read/28169240/synergistic-induction-of-apoptosis-in-b-cell-chronic-lymphocytic-leukemia-cells-after-treatment-with-all-trans-retinoic-acid-in-combination-with-interleukin-21-and-rituximab
#7
Kazem Abbaszadeh-Goudarzi, Fazel Shokri, Mostafa Hosseini, Farhad Jadidi-Niaragh, Ghasem Ghalamfarsa, Ali Akbar Saboor-Yaraghi
AIM: B-cell chronic lymphocytic leukemia (B-CLL) is the most common adult leukemia in the Western world and characterized by the progressive expansion of malignant B lymphocytes in peripheral blood. In spite of advances in sciences to recognize the number of effective agents for the treatment of chronic lymphocytic leukemia (CLL), this leukemia is thought as incurable one. Introducing a new therapy that has a direct effect on B-CLL lymphocytes and no cytotoxic effects on the other cells is a great wish...
October 2016: Journal of Cancer Research and Therapeutics
https://www.readbyqxmd.com/read/28157617/all-trans-retinoic-acid-represses-chemokine-expression-in-adipocytes-and-adipose-tissue-by-inhibiting-nf-%C3%AE%C2%BAb-signaling
#8
Esma Karkeni, Lauriane Bonnet, Julien Astier, Charlène Couturier, Julie Dalifard, Franck Tourniaire, Jean-François Landrier
An effect of the Vitamin A metabolite all-trans-retinoic acid (ATRA) on body weight regulation and adiposity has been described, but little is known about its impact on obesity-associated inflammation. Our objective was to evaluate the overall impact of this metabolite on inflammatory response in human and mouse adipocytes, using high-throughput methods, and to confirm its effects in a mouse model. ATRA (2 μM for 24 h) down-regulated the mRNA expression of 17 chemokines in human adipocytes, and limited macrophage migration in a TNFα-conditioned 3 T3-L1 adipocyte medium (73...
January 23, 2017: Journal of Nutritional Biochemistry
https://www.readbyqxmd.com/read/28145501/interactions-of-retinoids-with-the-abc-transporters-p-glycoprotein-and-breast-cancer-resistance-protein
#9
Szabolcs Tarapcsák, Gábor Szalóki, Ágnes Telbisz, Zsuzsanna Gyöngy, Krisztina Matúz, Éva Csősz, Péter Nagy, Imre J Holb, Ralph Rühl, László Nagy, Gábor Szabó, Katalin Goda
Retinoids - derivatives of vitamin A - are important cell permeant signaling molecules that regulate gene expression through activation of nuclear receptors. P-glycoprotein (Pgp) and ABCG2 are plasma membrane efflux transporters affecting the tissue distribution of numerous structurally unrelated lipophilic compounds. In the present work we aimed to study the interaction of the above ABC transporters with retinoid derivatives. We have found that 13-cis-retinoic acid, retinol and retinyl-acetate inhibited the Pgp and ABCG2 mediated substrate transport as well as the substrate stimulated ATPase activity of these transporters...
February 1, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28130038/autophagy-contributes-to-4-amino-2-trifluoromethyl-phenyl-retinate-induced-differentiation-in-human-acute-promyelocytic-leukemia-nb4-cells
#10
Yue Li, Ge Li, Ke Wang, Ya-Ya Xie, Ren-Peng Zhou, Yao Meng, Ran Ding, Jin-Fang Ge, Fei-Hu Chen
As a classic differentiation agent, all-trans retinoic acid (ATRA) has been widely used in treatment of acute promyelocytic leukemia (APL). However, clinical application of ATRA has limitations. Our previous studies suggested that 4-Amino-2-Trifluoromethyl-Phenyl Retinate (ATPR), a novel all-trans retinoic acid (ATRA) derivative designed and synthesized by our team, could induce differentiation of APL cells in vivo and in vitro. To explore the underlying mechanism of ATPR, the effect of ATPR on autophagy of APL cells was observed in the present study...
January 25, 2017: Toxicology and Applied Pharmacology
https://www.readbyqxmd.com/read/28129653/rxr%C3%AE-ligand-z-10-induces-pml-rar%C3%AE-cleavage-and-apl-cell-apoptosis-through-disrupting-pml-rar%C3%AE-rxr%C3%AE-complex-in-a-camp-independent-manner
#11
Lin Xu, Zhiping Zeng, Weidong Zhang, Gaoang Ren, Xiaobin Ling, Fengyu Huang, Peizhen Xie, Ying Su, Xiao-Kun Zhang, Hu Zhou
The major oncogenic driver of acute promyelocytic leukemia (APL) is the fusion protein PML-RARα originated from the chromosomal translocation t(15;17). All-trans retinoic acid (ATRA) and arsenic trioxide cure most patients by directly targeting PML-RARα. However, major issues including the resistance of ATRA and arsenic therapy still remain in APL clinical management. Here we showed that compound Z-10, a nitro-ligand of retinoid X receptor α (RXRα), strongly promoted the cAMP-independent apoptosis of both ATRA- sensitive and resistant NB4 cells via the induction of caspase-mediated PML-RARα degradation...
January 25, 2017: Oncotarget
https://www.readbyqxmd.com/read/28122350/transcriptional-suppression-of-microrna-27a-contributes-to-laryngeal-cancer-differentiation-via-gsk-3%C3%AE-involved-wnt-%C3%AE-catenin-pathway
#12
Sheng Chen, Yuan-Yuan Sun, Zhao-Xiong Zhang, Yun-Hui Li, Zhen-Ming Xu, Wei-Neng Fu
miR-27a regulates cell differentiation in a variety of diseases. However, whether and how miR-27a participates in laryngeal cancer cell differentiation remains unknown. Therefore, we explored role and molecular mechanism of miR-27a in laryngeal cancer differentiation in the study. We found that miR-27a expression was inversely correlated with laryngeal cancer differentiation degree based on the clinical pathological diagnosis of each patient. miR-27 asignificantly rescued differentiation and inhibited β-catenin, LEF1, OCT4 and SOX2 in Wnt/β-catenin pathway in all-trans-retinoic acid (ATRA)-induced laryngeal cancer cells...
January 20, 2017: Oncotarget
https://www.readbyqxmd.com/read/28114716/-very-severe-differentiation-syndrome-in-low-risk-acute-promyelocytic-leukemia-a-peril-of-differentiating-therapy
#13
Anna Hecht, Joerg Mezger, Martina Gnadler, Eva Lengfelder
History, examinations and diagnosis A young patient consulted the hospital because of spontaneous hematomas. The combination of pancytopenia and coagulopathy in the blood and the proving cytogenetic and moleculargenetic examinations of the bone marrow lead to the diagnosis of low-risk acute promyelocytic leukemia (APL). Therapy and clinical course During the combination therapy with ATRA and ATO, the patient developed a severe differentiation syndrome and hyperleukocytosis. Management of the condition was only possible due to clinical expertise and massive substitution of blood products and clotting factors...
January 2017: Deutsche Medizinische Wochenschrift
https://www.readbyqxmd.com/read/28111878/first-experience-of-the-aml-berlin-frankfurt-m%C3%A3-nster-group-in-pediatric-patients-with-standard-risk-acute-promyelocytic-leukemia-treated-with-arsenic-trioxide-and-all-trans-retinoid-acid
#14
Ursula Creutzig, Michael N Dworzak, Konrad Bochennek, Jörg Faber, Christian Flotho, Norbert Graf, Udo Kontny, Claudia Rossig, Irene Schmid, Arend von Stackelberg, Jans-Enno Mueller, Christine von Neuhoff, Dirk Reinhardt, Nils von Neuhoff
Recently, studies in adults with acute promyelocytic leukemia (APL) showed high cure rates in low-risk patients treated with all-trans retinoid acid (ATRA) and arsenic trioxide (ATO), while toxicities were significantly reduced compared to the standard treatment with ATRA and chemotherapy. Here we report about first experience with 11 pediatric patients with low-risk APL treated with ATRA and ATO. All patients stayed in molecular remission. All suffered from hyperleukocytosis. Two patients experienced reversible severe side effects...
January 23, 2017: Pediatric Blood & Cancer
https://www.readbyqxmd.com/read/28099588/dobutamine-stress-echocardiography-safety-in-chagas-disease-patients
#15
Daniela do Carmo Rassi, Marcelo Luiz Campos Vieira, Rogerio Gomes Furtado, Fabio de Paula Turco, Luciano Henrique Melato, Viviane Tiemi Hotta, Colandy Godoy de Oliveira Nunes, Luiz Rassi, Salvador Rassi
Background: A few decades ago, patients with Chagas disease were predominantly rural workers, with a low risk profile for obstructive coronary artery disease (CAD). As urbanization has increased, they became exposed to the same risk factors for CAD of uninfected individuals. Dobutamine stress echocardiography (DSE) has proven to be an important tool in CAD diagnosis. Despite being a potentially arrhythmogenic method, it is safe for coronary patients without Chagas disease. For Chagas disease patients, however, the indication of DSE in clinical practice is uncertain, because of the arrhythmogenic potential of that heart disease...
January 16, 2017: Arquivos Brasileiros de Cardiologia
https://www.readbyqxmd.com/read/28098786/retinoic-acid-and-its-role-in-modulating-intestinal-innate-immunity
#16
REVIEW
Paulo Czarnewski, Srustidhar Das, Sara M Parigi, Eduardo J Villablanca
Vitamin A (VA) is amongst the most well characterized food-derived nutrients with diverse immune modulatory roles. Deficiency in dietary VA has not only been associated with immune dysfunctions in the gut, but also with several systemic immune disorders. In particular, VA metabolite all-trans retinoic acid (atRA) has been shown to be crucial in inducing gut tropism in lymphocytes and modulating T helper differentiation. In addition to the widely recognized role in adaptive immunity, increasing evidence identifies atRA as an important modulator of innate immune cells, such as tolerogenic dendritic cells (DCs) and innate lymphoid cells (ILCs)...
January 13, 2017: Nutrients
https://www.readbyqxmd.com/read/28094608/surveillance-for-avian-influenza-virus-in-wild-birds-in-poland-2008-2015
#17
Edyta Świętoń, Krzysztof Wyrostek, Michał Jóźwiak, Monika Olszewska-Tomczyk, Katarzyna Domańska-Blicharz, Włodzimierz Meissner, Radosław Włodarczyk, Piotr Minias, Tomasz Janiszewski, Zenon Minta, Krzysztof Śmietanka
We tested wild birds in Poland during 2008-2015 for avian influenza virus (AIV). We took 10,312 swabs and feces samples from 6,314 live birds representing 12 orders and 84 bird species, mostly from orders Anseriformes and Charadriiformes, for testing and characterization by various PCR methods. From PCR-positive samples, we attempted to isolate and subtype the virus. The RNA of AIV was detected in 1.8% (95% confidence interval, 1.5%-2.1%) of birds represented by 48 Mallards ( Anas platyrhynchos ), 11 Mute Swans ( Cygnus olor ), 48 Common Teal ( Anas crecca ), three Black-headed Gulls (Chroicocephalus ridibundus), one Common Coot ( Fulica atra ), one Garganey (Spatula querquedula), and one unidentified bird species...
January 17, 2017: Journal of Wildlife Diseases
https://www.readbyqxmd.com/read/28094291/differential-effects-of-vitamins-a-and-d-on-the-transcriptional-landscape-of-human-monocytes-during-infection
#18
Tilman E Klassert, Julia Bräuer, Martin Hölzer, Magdalena Stock, Konstantin Riege, Cristina Zubiría-Barrera, Mario M Müller, Silke Rummler, Christine Skerka, Manja Marz, Hortense Slevogt
Vitamin A and vitamin D are essential nutrients with a wide range of pleiotropic effects in humans. Beyond their well-documented roles in cellular differentiation, embryogenesis, tissue maintenance and bone/calcium homeostasis, both vitamins have attracted considerable attention due to their association with-immunological traits. Nevertheless, our knowledge of their immunomodulatory potential during infection is restricted to single gene-centric studies, which do not reflect the complexity of immune processes...
January 17, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28090317/all-trans-retinoic-acid-enhances-cytotoxic-effect-of-t-cells-with-an-anti-cd38-chimeric-antigen-receptor-in-acute-myeloid-leukemia
#19
Tetsumi Yoshida, Keichiro Mihara, Yoshifumi Takei, Kazuyoshi Yanagihara, Takanori Kubo, Joyeeta Bhattacharyya, Chihaya Imai, Tatsuji Mino, Yoshihiro Takihara, Tatsuo Ichinohe
We reported that T cells with anti-CD38-chimeric antigen receptors (CAR) eliminated B-cell lymphoma cells expressing CD38. To employ anti-CD38-CAR against acute myeloid leukemia (AML) blasts not expressing CD38, it is necessary to induce or increase the intensity of CD38 expression. A lactate dehydrogenase (LDH)-releasing assay and flow cytometry showed that anti-CD38-CAR T cells were cytotoxic against AML lines (THP-1 and CMK) expressing high CD38 levels (>99%), in time- and number of effector-dependent manners...
December 2016: Clinical & Translational Immunology
https://www.readbyqxmd.com/read/28089489/long-non-coding-rnas-are-associated-with-spatiotemporal-gene-expression-profiles-in-the-marine-gastropod-tegula-atra
#20
Camille Détrée, Gustavo Núñez-Acuña, Fabian Tapia, Cristian Gallardo-Escárate
Increasing evidence suggests that long non-coding RNAs (lncRNAs) play diverse roles in cellular processes, including in the regulation of embryogenesis and growth. However, little is known about the role of lncRNAs in marine invertebrates inhabiting changing environments. Therefore, the aim of this study was to present the first characterization of lncRNAs in an intertidal marine gastropod. Specifically, Tegula atra individuals were sampled in four sites of the central-northern Chilean coastline (28-31°) during summer and winter...
January 12, 2017: Marine Genomics
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