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https://www.readbyqxmd.com/read/28735889/acute-promyelocytic-leukemia-a-perspective
#1
Farhad Ravandi, Richard Stone
Treatment of patients with acute promyelocytic leukemia has significantly improved with the introduction of target specific agents all-trans retinoic acid (ATRA) and arsenic trioxide (ATO) with long term survival a reality for the majority of patients. This can serve as a paradigm for cancer therapy where with the introduction of more potent target-specific drugs our reliance on the traditional cytotoxic agents is likely to diminish and less toxic and more effective regimens are likely to replace the current intensive chemotherapy regimens...
July 6, 2017: Clinical Lymphoma, Myeloma & Leukemia
https://www.readbyqxmd.com/read/28719273/bungarus-multicinctus-multicinctus-snakebite-in-taiwan
#2
Yan-Chiao Mao, Po-Yu Liu, Liao-Chun Chiang, Shu-Chen Liao, Hung-Yuan Su, Szu-Yin Hsieh, Chen-Chang Yang
AbstractAlthough specific antivenom is available in Taiwan, respiratory failure and general pain frequently accompany Bungarus multicinctus envenomation and there have been few reports on the management of B. multicinctus envenomation. We retrospectively analyzed 44 cases of B. multicinctus bite admitted to Taichung Veterans General Hospital (VGH) or to Taipei VGH. Demographic data, treatment, and outcome of patients with and without respiratory failure were compared. In this study, 20.5% patients had bites without noticeable signs or symptoms of significant envenoming, 27...
June 2017: American Journal of Tropical Medicine and Hygiene
https://www.readbyqxmd.com/read/28716741/inferring-the-shallow-phylogeny-of-true-salamanders-salamandra-by-multiple-phylogenomic-approaches
#3
Ariel Rodríguez, James D Burgon, Mariana Lyra, Iker Irisarri, Denis Baurain, Leon Blaustein, Bayram Göcmen, Sven Künzel, Barbara Mable, Arne W Nolte, Michael Veith, Sebastian Steinfartz, Kathryn R Elmer, Hervé Philippe, Miguel Vences
The rise of high-throughput sequencing techniques provides the unprecedented opportunity to analyse controversial phylogenetic relationships in great depth, but also introduce the risk of being misinterpreted by high node support values influenced by unevenly distributed missing data or unrealistic model assumptions. Here, we use three largely independent phylogenomic data sets to reconstruct the controversial phylogeny of true salamanders of the genus Salamandra. a group of amphibians providing an intriguing model to study the evolution of aposematism and viviparity...
July 14, 2017: Molecular Phylogenetics and Evolution
https://www.readbyqxmd.com/read/28715808/retinoic-acid-facilitates-toll-like-receptor-4-expression-to-improve-intestinal-barrier-function-through-retinoic-acid-receptor-beta
#4
Yingying Li, Yuan Gao, Ting Cui, Ting Yang, Lan Liu, Tingyu Li, Jie Chen
BACKGROUND/AIMS: Vitamin A (VA) protects the intestinal epithelial barrier by improving cell migration and proliferation. Our previous studies demonstrated that VA deficiency (VAD) during pregnancy suppresses the systemic and mucosal immune responses in the intestines of offspring and that VA supplementation (VAS) during early life can increase immune cell counts. However, little is known about the mechanisms by which VA regulates intestinal epithelial barrier function. METHODS: Caco-2 cells were treated with all-trans retinoic acid (ATRA) for 24 hours to determine the optimum ATRA concentration to which the cells in question respond...
July 17, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/28715585/retinoic-acid-engineered-amniotic-membrane-used-as-graft-or-homogenate-positive-effects-on-corneal-alkali-burns
#5
Romain Joubert, Estelle Daniel, Nicolas Bonnin, Aurélie Comptour, Christelle Gross, Corinne Belville, Frédéric Chiambaretta, Loïc Blanchon, Vincent Sapin
Purpose: Alkali burns are the most common, severe chemical ocular injuries, their functional prognosis depending on corneal wound healing efficiency. The purpose of our study was to compare the benefits of amniotic membrane (AM) grafts and homogenates for wound healing in the presence or absence of previous all-trans retinoic acid (atRA) treatment. Methods: Fifty male CD1 mice with reproducible corneal chemical burn were divided into five groups, as follows: group 1 was treated with saline solution; groups 2 and 3 received untreated AM grafts or grafts treated with atRA, respectively; and groups 4 and 5 received untreated AM homogenates or homogenates treated with atRA, respectively...
July 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28713967/involvement-of-notch2-in-all%C3%A2-trans-retinoic-acid%C3%A2-induced-inhibition-of-mouse-embryonic-palate-mesenchymal-cell-proliferation
#6
Yadong Zhang, Shiyi Dong, Jianning Wang, Miao Wang, Mu Chen, Hongzhang Huang
Cleft palate is among the most common congenital disorders, and can be induced by exposure to all‑trans retinoic acid (atRA) during mice and human embryogenesis. However, the mechanism underlying the implication of atRA in the development of cleft palate has yet to be elucidated. In the present study, atRA administered by gavage resulted in formation of a cleft palate in 99% of treated C57BL/6 mice. Notch2 was revealed to be upregulated in mouse embryonic palate mesenchymal (MEPM) cells in the atRA‑treated group compared with untreated control mice between embryonic day (E)12...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28712407/-detection-and-clinical-significance-of-pml-protein-expression-of-acute-promyelocytic-leukemia-cells
#7
Mei Song, Xiumei Wu, Mei Zhang, Pengcheng He
Objective To study the expression patterns of promyelocytic leukemia (PML) protein at different stages of acute promyelocytic leukemia (APL) and investigate the effects that the arsenical, all-trans retinoic acid (ATRA) and chemotherapeutic drugs on PML protein expression patterns. Methods The bone marrow cells of 42 APL patients, NB4 cells and MR2 cells were collected and treated separately with 1 μmol/L arsenic trioxide (As2O3), 1 μmol/L tetra-arsenic tetra-sulfide (As4S4), 1 μmol/L ATRA, 10 mg/L cytosine arabinoside, and 1 mg/L homoharringtonine...
July 2017: Xi Bao Yu Fen Zi Mian Yi Xue za Zhi, Chinese Journal of Cellular and Molecular Immunology
https://www.readbyqxmd.com/read/28696354/a-case-of-aml-characterized-by-a-novel-t-4-15-q31-q22-translocation-that-confers-a-growth-stimulatory-response-to-retinoid-based-therapy
#8
Justin M Watts, Aymee Perez, Lutecia Pereira, Yao-Shan Fan, Geoffrey Brown, Francisco Vega, Kevin Petrie, Ronan T Swords, Arthur Zelent
Here we report the case of a 30-year-old woman with relapsed acute myeloid leukemia (AML) who was treated with all-trans retinoic acid (ATRA) as part of investigational therapy (NCT02273102). The patient died from rapid disease progression following eight days of continuous treatment with ATRA. Karyotype analysis and RNA-Seq revealed the presence of a novel t(4;15)(q31;q22) reciprocal translocation involving the TMEM154 and RASGRF1 genes. Analysis of primary cells from the patient revealed the expression of TMEM154-RASGRF1 mRNA and the resulting fusion protein, but no expression of the reciprocal RASGRF1-TMEM154 fusion...
July 11, 2017: International Journal of Molecular Sciences
https://www.readbyqxmd.com/read/28694088/enhanced-expression-of-tumour-suppressor-rar-%C3%AE-by-dspc-nano-formulated-lipo-atra-in-the-lung-of-b16f10-cell-implanted-c57bl6-mice-and-in-a549-cells
#9
V M Berlin Grace, Reshma Mahima Reji, Viswanathan Sundaram
AIM: All Trans Retinoic acid (ATRA) is an efficient drug for leukemia, but is not efficient therapy for solid cancers. Hence we have used 1,2-distearoyl-sn-glycero-3-phosphocholine (DSPC) and cholesterol lipo-ATRA to investigate its molecular therapeutic effect on lung cancer. The objective was to find whether it could enhance ATRA receptor, RAR-β expression in lung cells as it was lost in majority of cancers including lung cancer. MATERIALS AND METHODS: The study was made in an experimental C57BL/6 mice model developed by tail vein injection of B16F10 cells and in A549 human lung cancer cells...
July 7, 2017: Life Sciences
https://www.readbyqxmd.com/read/28690160/polymer-conjugated-retinoids-for-controlled-transdermal-delivery
#10
Steven A Castleberry, Mohiuddin A Quadir, Malak Abu Sharkh, Kevin E Shopsowitz, Paula T Hammond
All-trans retinoic acid (ATRA), a derivative of vitamin A, is a common component in cosmetics and commercial acne creams as well as being a first-line chemotherapeutic agent. Today, formulations for the topical application of ATRA rely on creams and emulsions to incorporate the highly hydrophobic ATRA drug. These strategies, when applied to the skin, deliver ATRA as a single bolus, which is immediately taken up into the skin and contributes to many of the known adverse side effects of ATRA treatment, including skin irritation and hair loss...
July 6, 2017: Journal of Controlled Release: Official Journal of the Controlled Release Society
https://www.readbyqxmd.com/read/28688117/serologic-evidence-of-west-nile-virus-and-usutu-virus-infections-in-eurasian-coots-in-the-netherlands
#11
S M Lim, M Geervliet, J H Verhagen, G J D M Müskens, F A Majoor, A D M E Osterhaus, B E E Martina
West Nile virus (WNV) and Usutu virus (USUV) are arboviruses that are maintained in enzootic transmission cycles between mosquitoes and birds and are occasionally transmitted to mammals. As arboviruses are currently expanding their geographic range and emerging in often unpredictable locations, surveillance is considered an important element of preparedness. To determine whether sera collected from resident and migratory birds in the Netherlands as part of avian influenza surveillance would also represent an effective source for proactive arbovirus surveillance, a random selection of such sera was screened for WNV antibodies using a commercial ELISA...
July 7, 2017: Zoonoses and Public Health
https://www.readbyqxmd.com/read/28687976/annexin-a2-s100a10-heterotetramer-is-upregulated-by-pml-rar%C3%AE-fusion-protein-and-promotes-plasminogen-dependent-fibrinolysis-and-matrix-invasion-in-acute-promyelocytic-leukemia
#12
Dan Huang, Yan Yang, Jian Sun, Xiaorong Dong, Jiao Wang, Hongchen Liu, Chengquan Lu, Xueyu Chen, Jing Shao, Jinsong Yan
Aberrant expression of annexin A2-S100A10 heterotetramer (AIIt) associated with PML/RARα fusion protein causes lethal hyperfibrinolysis in acute promyelocytic leukemia (APL), but the mechanism is unclear. To facilitate the investigation of regulatory association between ANXA2 and promyelocytic leukemia/retinoic acid receptor α (PML/RARα) fusion protein, this work was performed to determine the transcription start site of ANXA2 promoter with rapid amplification of 5'-cDNA ends analysis. Zinc-induced U937/PR9 cells expressed PML/RARα fusion protein, and resultant increases in ANXA2 transcripts and translational expressions of both ANXA2 and S100A10, while S100A10 transcripts remained constitutive...
July 8, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28682499/high-dose-dexamethasone-or-all-trans-retinoic-acid-restores-the-balance-of-macrophage-toward-m2-in-immune-thrombocytopenia
#13
Q Feng, M Xu, Y Y Yu, Y Hou, X Mi, Y X Sun, S Ma, X Y Zuo, L L Shao, M Hou, X H Zhang, J Peng
Immune thrombocytopenia (ITP) is an autoimmune disorder. Deficiency of immune-tolerance in antigen-presenting cells (APCs) and cross-communication between APCs and T cells are involved in the pathogenesis of ITP. Macrophages can polarize into pro-inflammatory M1 or anti-inflammatory M2 phenotypes in response to different environmental stimuli, and possess diverse immunological functions OBJECTIVES: To investigate the imbalance of M1/M2 in ITP and whether high-dose dexamethasone (HD-DXM) or all-trans retinoic acid (ATRA) could restore this imbalance METHODS: Numbers of M1 and M2 in the spleens of ITP patients and patients with traumatic spleen rupture were analyzed by immunofluorescence...
July 6, 2017: Journal of Thrombosis and Haemostasis: JTH
https://www.readbyqxmd.com/read/28680753/efficacy-of-vaccination-with-tumor-exosome-loaded-dendritic-cells-combined-with-cytotoxic-drug-treatment-in-pancreatic-cancer
#14
Li Xiao, Ulrike Erb, Kun Zhao, Thilo Hackert, Margot Zöller
Pancreatic cancer (PaCa) has a dismal prognosis and adjuvant immunotherapy frequently is of low efficacy due to immunosuppressive features of PaCa and PaCa-stroma. We here explored, whether the efficacy of vaccination with tumor-exosome (TEX)-loaded dendritic cells (DC) can be improved by combining with drugs affecting myeloid-derived suppressor cells (MDSC). Experiments were performed with the UNKC6141 PaCa line. UNKC6141 TEX-loaded DC were weekly intravenously injected, mice additionally receiving Gemcitabine (GEM) and/or ATRA and/or Sunitinib (Sun)...
2017: Oncoimmunology
https://www.readbyqxmd.com/read/28680330/differentiated-all-trans-retinoic-acid-response-of-naive-cd4-cd25-cells-isolated-from-rats-with-collagen-induced-arthritis-and-healthy-ones-under-in-vitro-conditions
#15
Isaura Felcenloben, Edyta Żyromska, Tomasz Piasecki, Joanna Rossowska, Anna Kędzierska, Marcin Nowak, Marcin Żyromski, Anna Chełmońska-Soyta
AIM O THE STUDY: To compare the potential of CD4+CD25- cells, isolated from both healthy rats and rats with CIA (Collagen-Induced Arthritis), for differentiation into regulatory T cells in the presence of all-trans retinoic acid in order to learn more about the activation mechanisms and therapeutic potential of regulatory T cells. MATERIAL AND METHODS: Sorted CD4+CD25- cells were cultured in vitro with/without ATRA, and then the frequency of regulatory T cells and their ability to secrete IL-10 by CD4+ FOXP3+ cells was examined...
2017: Central-European Journal of Immunology
https://www.readbyqxmd.com/read/28679652/long-noncoding-rna-expression-profile-in-cytogenetically-normal-acute-myeloid-leukemia-identifies-a-distinct-signature-and-a-new-biomarker-in-npm1-mutated-patients
#16
Etienne De Clara, Morgane Gourvest, Hanjing Ma, François Vergez, Marie Tosolini, Sébastien Dejean, Cécile Demur, Eric Delabesse, Christian Recher, Christian Touriol, Maria Paola Martelli, Brunangelo Falini, Pierre Brousset, Marina Bousquet
Long noncoding RNAs are defined as transcripts larger than 200 nucleotides but without protein-coding potential. Cumulative evidence points towards an important role of long noncoding RNAs in cancer initiation, development and progression. In this study we sought to evaluate the long noncoding RNA expression profile of patients with cytogenetically normal acute myeloid leukemia. RNA-sequencing of forty cytogenetically normal acute myeloid leukemia patients allowed us to quantify 11036 long noncoding RNAs. Among them more than 8000 were previously-undescribed long noncoding RNAs...
July 4, 2017: Haematologica
https://www.readbyqxmd.com/read/28677722/regulation-of-retinoic-acid-synthetic-enzymes-by-wt1-and-hdac-inhibitors-in-293-cells
#17
Yifan Li, Lei Wang, Weipeng Ai, Nianhui He, Lin Zhang, Jihui Du, Yong Wang, Xingjian Mao, Junqi Ren, Dan Xu, Bei Zhou, Rong Li, Liwen Mai
All-trans retinoic acid (atRA), which is mainly generated endogenously via two steps of oxidation from vitamin A (retinol), plays an indispensible role in the development of the kidney and many other organs. Enzymes that catalyze the oxidation of retinol to generate atRA, including aldehyde dehydrogenase 1 family (ALDH1)A1, ALDH1A2 and ALDH1A3, exhibit complex expression patterns at different stages of renal development. However, molecular triggers that control these differential expression levels are poorly understood...
July 3, 2017: International Journal of Molecular Medicine
https://www.readbyqxmd.com/read/28665981/ha117-endows-hl60-cells-with-a-stem-like-signature-by-inhibiting-the-degradation-of-dnmt1-via-its-ability-to-down-regulate-expression-of-the-ggl-domain-of-rgs6
#18
Shuangshuang Li, Xianqing Jin, Huan Wu, Yi Wang, Xiaoqing Li, Yuxia Guo, Shaoyan Liang
All-trans retinoic acid (ATRA) induces complete remission in almost all patients with acute promyelocytic leukemia (APL) via its ability to induce the in vivo differentiation of APL blasts. However, prolonged ATRA treatment can result in drug resistance. In previous studies, we generated a multi-drug-resistant HL60/ATRA cell line and found it to contain a new drug resistance-related gene segment, HA117. In this study, we demonstrate that ATRA induces multi-drug-resistant subpopulations of HL60 cells with a putative stem-like signature by up-regulating the expression of the new gene segment HA117...
2017: PloS One
https://www.readbyqxmd.com/read/28656276/lentivirus%C3%A2-mediated-rig%C3%A2-i-knockdown-relieves-cell-proliferation-inhibition-cell-cycle-arrest-and-apoptosis-in-atra%C3%A2-induced-nb4-cells-via-the-akt%C3%A2-foxo3a-signaling-pathway-in-vitro
#19
Lei Chen, Ya-Bin Cui, Yu-Ling Si, Wei-Dong Su, Xin-Chao Wang, Hua Pang, Li-Jun Qiu
Retinoic acid inducible gene I (RIG‑I) is upregulated during all‑trans retinoic acid (ATRA)‑induced terminal granulocytic differentiation of NB4 acute promyelocytic leukemia (APL) cells. However, the function and mechanism of RIG‑I in NB4 cells remains to be fully elucidated. In the present study, lentivirus‑mediated RIG‑I‑knockdown was used to investigate the proliferation, cell cycle and apoptotic processes of ATRA‑induced NB4 cells in vitro using an MTT assay and flow cytometry, respectively...
September 2017: Molecular Medicine Reports
https://www.readbyqxmd.com/read/28655097/-efficacy-of-combination-of-atra-ato-and-anthracyclines-induction-therapy-in-patients-with-acute-promyelocytic-leukemia
#20
R J Ma, Z M Zhu, X L Yuan, L Jiang, S W Yang, J Yang, J M Guo, L Zhang, P C Lei, Z Wang, Y Z Zang, Y Q Chen, T B Wang, D Kong, K Sun, Y Zhang
Objective: To explore the efficacies of regimens of three-drug induction therapy (ATRA+ATO+anthracyclines) versus two-drug induction therapy (ATRA+ATO) in patients with acute promyelocytic leukemia (APL). Methods: Of 184 patients diagnosed with APL from January 2009 to March 2016, 58 patients underwent three-drug induction therapy, while the rest were treated with two-drug induction therapy. Three-drug induction therapy was of ATRA (20 mg·m(-2)·d(-1), d(1-28)) + ATO (0.16 mg·kg(-1)·d(-1), d(1-28)) + Idarubicin (8 mg·m(-2)·d(-1), d(3-5)) /daunorubicin (40 mg·m(-2)·d(-1), d(3-5)) , while two-drug induction therapy ATRA+ATO with the same doses and methods as above...
June 14, 2017: Zhonghua Xue Ye Xue za Zhi, Zhonghua Xueyexue Zazhi
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