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https://www.readbyqxmd.com/read/28454360/location-of-nls-rar%C3%AE-protein-in-nb4-cell-and-nude-mice
#1
Hui Wang, Rong Yang, Liang Zhong, Xin-Yu Zhu, Peng-Peng Ma, Xiao-Qun Yang, Kai-Ling Jiang, Bei-Zhong Liu
In the majority of acute promyelocytic leukemia (APL) cases, translocons produce a promyelocytic leukemia protein-retinoic acid receptor α (PML-RARα) fusion gene. Studies have reported that neutrophil elastase (NE) cleaves bcr-1-derived PML-RAα in early myeloid cells, leaving only the nuclear localization signal (NLS) of PML attached to RARα. NLS-RARα promotes cell growth and inhibits differentiation in response to ATRA. However, the mechanisms by which NLS-RARα affects cell biological characteristics are yet to be fully elucidated...
April 2017: Oncology Letters
https://www.readbyqxmd.com/read/28446509/inhibition-of-the-all-trans-retinoic-acid-hydroxylases-cyp26a1-and-cyp26b1-results-in-dynamic-tissue-specific-changes-in-endogenous-atra-signaling
#2
Faith Stevison, Cathryn Hogarth, Sasmita Tripathy, Travis Kent, Nina Isoherranen
all-trans-retinoic acid (atRA), the active metabolite of vitamin A, is a ligand for several nuclear receptors and acts as a critical regulator of many physiological processes. The cytochrome P450 family 26 (CYP26) enzymes are responsible for atRA clearance, and are potential drug targets to increase concentrations of endogenous atRA in a tissue-specific manner. Talarozole is a potent inhibitor of CYP26A1 and CYP26B1, and has shown some success in clinical trials. Yet, it is not known what magnitude of change is needed in tissue atRA concentrations to promote atRA signaling changes...
April 26, 2017: Drug Metabolism and Disposition: the Biological Fate of Chemicals
https://www.readbyqxmd.com/read/28446275/-acute-promyelocytic-leukemia-developed-during-imatinib-therapy-for-gastrointestinal-stromal-tumors
#3
Ya-Ping Yu, Ping Song, Jian-Gang Mei, Zhi-Ming An, Xiao-Gang Zhou, Feng Li, Li-Ping Wang, Yu-Mei Tang, Yong-Ping Zhai
OBJECTIVE: To investigate the clinicopathologic and molecular characteristics of acute promyelocytic leukemia(APL) developed during imatinib therapy for gastrointestinal stromal tumors(GIST). METHODS: A 49-year-old woman was hospitalized for abdominal pain. The abdominal CT revealed a gastric mass. Laparoscopic resection of the tumor was performed. The histopathologic analysis showed poorly differentiated malignant cell infiltration with epithelioid features. Immunohistochemistry staining of these cells was positive for CD117 and CD34...
April 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28446274/-efficacy-of-idarubicin-based-stratified-therapy-for-acute-promyelocytic-leukemia
#4
Wei Guan, Wen-Jun Li, Lan Yang, Yu Jing, Li Yu
OBJECTIVE: To investigate the remission rate of all-transretinoic acid (ATRA) combined with arsenics acid(ATO) on acute promyelocytic leukemia, and the efficacy and safety of sequential consolidation therapy with idarubicin, all-trans retinoic acid and arsenic trioxide/compound Huangdai tablet. METHODS: Between January 2011 and January 2016 years 22 patients with newly diagnosed acute promyelocytic leukemia who received ATRA combined with ATO till complete remission in our hospital were retrospectively analyzed...
April 2017: Zhongguo Shi Yan Xue Ye Xue za Zhi
https://www.readbyqxmd.com/read/28445844/upregulation-of-mir-142-3p-improves-drug-sensitivity-of-acute-myelogenous-leukemia-through-reducing-p-glycoprotein-and-repressing-autophagy-by-targeting-hmgb1
#5
Yuan Zhang, Yufeng Liu, Xueju Xu
miR-142-3p was reported to be downregulated in acute myelogenous leukemia (AML) and acted as a novel diagnostic marker. However, the regulatory effect of miR-142-3p on drug resistance of AML cells and its underlying mechanism have not been elucidated. Here, we found that miR-142-3p was significantly downregulated and high mobility group box 1 (HMGB1) was dramatically upregulated in AML samples and cells, as well as drug-resistant AML cells. P-gp level and autophagy were markedly enhanced in HL-60/ADR and HL-60/ATRA cells...
April 23, 2017: Translational Oncology
https://www.readbyqxmd.com/read/28436029/wnt4-acts-downstream-of-bmp2-to-mediate-the-regulation-of-atra-signaling-on-runx1-expression-implications-for-terminal-differentiation-of-antler-chondrocytes
#6
Hong-Liang Zhang, Zhan-Qing Yang, Cui-Cui Duan, Shuang Geng, Kai Wang, Hai-Fan Yu, Zhan-Peng Yue, Bin Guo
Although ATRA is involved in regulating the proliferation and differentiation of chondrocytes, its underlying mechanism remains unknown. Here we showed that ATRA could stimulate the proliferation of antler chondrocytes and expression of COL X and MMP13 which were two well-known markers for hypertrophic chondrocytes. Silencing of CRABP2 prevented the induction of ATRA on chondrocyte terminal differentiation, while overexpression of CRABP2 exhibited the opposite effects. CYP26A1 and CYP26B1 weakened the sensitivity of antler chondrocytes to ATRA...
April 24, 2017: Journal of Cellular Physiology
https://www.readbyqxmd.com/read/28426724/cloning-retinoid-and-peroxisome-proliferator-activated-nuclear-receptors-of-the-pacific-oyster-and-in-silico-binding-to-environmental-chemicals
#7
Susanne Vogeler, Tamara S Galloway, Michail Isupov, Tim P Bean
Disruption of nuclear receptors, a transcription factor superfamily regulating gene expression in animals, is one proposed mechanism through which pollution causes effects in aquatic invertebrates. Environmental pollutants have the ability to interfere with the receptor's functions through direct binding and inducing incorrect signals. Limited knowledge of invertebrate endocrinology and molecular regulatory mechanisms, however, impede the understanding of endocrine disruptive effects in many aquatic invertebrate species...
2017: PloS One
https://www.readbyqxmd.com/read/28425567/effect-of-ngf-from-venom-of-chinese-cobra-naja-atra-on-chondrocytes-proliferation-and-metabolism-in-vitro
#8
Jiachang Tan, Zhenhui Lu, Zhikang Miao, Danqing Lei, Li Zheng, Jinmin Zhao
Autologous chondrocyte implantation (ACI) is promising strategy for cartilage repair. However, chondrocyte phenotype is easily lost when expanded in vitro which defined as "dedifferentiation". To ensure successful therapy, an effective pro-chondrogenic agent is necessary to overcome the obstacle of limited cell numbers in the restoration process, and dedifferentiation is a prerequisite. In the present study, we investigated the chondro-protective effect of NGF from Chinese cobra venom on human chondrocytes by determination of its specific effect on cell viability, proliferation, morphology, GAG production and cartilage specific gene expression...
April 20, 2017: Journal of Cellular Biochemistry
https://www.readbyqxmd.com/read/28425042/arsenic-trioxide-induced-rhabdomyolysis-a-rare-but-severe-side-effect-in-an-apl-patient-a-case-report
#9
Haiyan He, Ran An, Jian Hou, Weijun Fu
Arsenic trioxide (ATO), a component of the traditional Chinese medicine arsenic sublimate, promotes apoptosis and induces leukemic cell differentiation. Combined with all-trans-retinotic acid (ATRA), ATO has become the first-line induction therapy in treating acute promyelocytic leukemia (APL). The most common side effects of ATO include hepatotoxicity, gastrointestinal symptoms, water-sodium retention, and nervous system damage. In this report, we present a rare side effect, rhabdomyolysis, in a 68-year-old female APL patient who was treated with ATO...
April 19, 2017: Frontiers of Medicine
https://www.readbyqxmd.com/read/28420180/synthesis-and-antiproliferative-activity-of-novel-all-trans-retinoic-acid-podophyllotoxin-conjugate-towards-human-gastric-cancer-cells
#10
Lei Zhang, Jing Wang, Lai Liu, Chengyue Zheng, Yang Wang
With the purpose of creating a multifunctional drug for gastric cancer treatment, a novel all-trans-retinoic acid (ATRA) conjugate with podophyllotoxin (PPT) was designed and synthesized, and its in vitro antiproliferative activity was evaluated against human gastric cancer cell lines using CCK-8 assay. The conjugate, P-A, exhibited significant anticancer activity against MKN-45 and BGC-823 cells with IC50 values of 0.419 ± 0.032 and 0.202 ± 0.055 μM, respectively. Moreover, P-A efficiently triggered cell cycle arrest and induced apoptosis in MKN-45 and BGC-823 cells due to modulation of cell cycle arrest- (CDK1, CDK2, CyclinA and CyclinB1) and apoptosis- (cleaved caspase-3, -8 and -9) related proteins, respectively...
April 17, 2017: Molecules: a Journal of Synthetic Chemistry and Natural Product Chemistry
https://www.readbyqxmd.com/read/28418498/suppression-by-an-rar-%C3%AE-agonist-of-collagen-degradation-mediated-by-corneal-fibroblasts
#11
Kazuhiro Kimura, Hongyan Zhou, Tomoko Orita, Masaaki Kobayashi, Teruo Nishida, Koh-Hei Sonoda
Purpose: To examine the role of retinoic acid receptor (RAR) isoforms in interleukin-1β (IL-1β)-induced collagen degradation by corneal fibroblasts. Methods: Primary rabbit corneal fibroblasts embedded in a three-dimensional collagen gel were incubated with or without all-trans retinoic acid (ATRA), the RAR-α agonist Am580, the RAR-β agonist AC55649, or the RAR-γ agonist R667. Collagen degradation was determined by measurement of hydroxyproline produced in acid hydrolysates of culture supernatants...
April 1, 2017: Investigative Ophthalmology & Visual Science
https://www.readbyqxmd.com/read/28408791/all-trans-retinoic-acid-modulates-tlr4-nf-%C3%AE%C2%BAb-signaling-pathway-targeting-tnf-%C3%AE-and-nitric-oxide-synthase-2-expression-in-colonic-mucosa-during-ulcerative-colitis-and-colitis-associated-cancer
#12
Hayet Rafa, Sarra Benkhelifa, Sonia AitYounes, Houria Saoula, Said Belhadef, Mourad Belkhelfa, Aziza Boukercha, Ryma Toumi, Imene Soufli, Olivier Moralès, Yvan de Launoit, Hassen Mahfouf, M'hamed Nakmouche, Nadira Delhem, Chafia Touil-Boukoffa
Colitis associated cancer (CAC) is the colorectal cancer (CRC) subtype that is associated with bowel disease such as ulcerative colitis (UC). The data on role of NF-κB signaling in development and progression of CAC were derived from preclinical studies, whereas data from human are rare. The aim of this work was to study the contribution of NF-κB pathway during UC and CAC, as well as the immunomodulatory effect of all-trans retinoic acid (AtRA). We analyzed the expression of NOS2, TNF-α, TLR4, and NF-κB, in colonic mucosa...
2017: Mediators of Inflammation
https://www.readbyqxmd.com/read/28404959/inhibition-of-the-prolyl-isomerase-pin1-enhances-the-ability-of-sorafenib-to-induce-cell-death-and-inhibit-tumor-growth-in-hepatocellular-carcinoma
#13
Min Zheng, Huijuan Xu, Xin-Hua Liao, Champ Peng Chen, Arina Li Zhang, Wenxian Lu, Long Wang, Dayun Yang, Jichuang Wang, Hekun Liu, Xiao Zhen Zhou, Kun Ping Lu
Hepatocellular carcinoma (HCC) is the sixth most common cancer, but is the second leading cause of cancer deaths, partially due to its heterogeneity and drug resistance. Sorafenib is the only medical treatment with a proven efficacy against advanced HCC, but its overall clinical efficacy is still modest. Therefore, a major challenge is how to improve its therapeutic efficacy. The unique prolyl isomerase Pin1 regulates numerous cancer-driving pathways. Notably, Pin1 is overexpressed in about 70% HBV-positive HCC patients and contributes to HCC tumorigenesis...
March 7, 2017: Oncotarget
https://www.readbyqxmd.com/read/28404891/hmgb1-promotes-differentiation-syndrome-by-inducing-hyperinflammation-via-mek-erk-signaling-in-acute-promyelocytic-leukemia-cells
#14
Lanlan Tang, Wenwen Chai, Fanghua Ye, Yan Yu, Lizhi Cao, Minghua Yang, Min Xie, Liangchun Yang
Differentiation therapy based on all-trans-retinoic acid (ATRA) and arsenic trioxide (ATO) for the treatment of acute promyelocytic leukemia (APL) is complicated by the development of differentiation syndrome (DS), which can be fatal. We examined the role of HMGB1 (high-mobility group box 1) in DS using both in vitro and in vivo models. HMGB1 and the pro-inflammatory cytokines IL-1β and TNF-α were gradually released from NB4 and HL-60 cells treated with ATRA and/or ATO. Similarly, higher serum HMGB1 levels positively correlated with the clinical status of DS patients...
February 17, 2017: Oncotarget
https://www.readbyqxmd.com/read/28403785/apoptotic-effects-of-some-tetrahydronaphthalene-derivatives-on-k562-human-chronic-myelogenous-leukemia-cell-line
#15
Aslı Koç, Tulin Ozkan, Arzu Zeynep Karabay, Yalda Hekmatshoar, Ayse Selen Gurkan-Alp, Fugen Aktan, Zeliha Buyukbingol, Asuman Sunguroglu, Erdem Buyukbingol
BACKGROUND: Retinoids are synthetic and naturally occurring derivatives of vitamin A (retinol) which have been suggested to mediate inhibition of cancer cell growth and apoptosis. It has been reported that all trans retinoic acid (ATRA) exhibited suppressive effects on different types of leukemia including chronic myelogenous leukemia. OBJECTIVE: In the present study, we aim to find out the effects of 6 synthetic N-(3,5,5,8,8-pentamethyl-5,6,7,8-tetrahydronaphthalene-2-yl)-carboxamide derivatives (compound 6-12) on cell viability and apoptotic pathways in K562 human chronic myelogenous leukemia cell line...
April 12, 2017: Anti-cancer Agents in Medicinal Chemistry
https://www.readbyqxmd.com/read/28396683/preparation-and-neutralization-efficacy-of-igy-antibodies-raised-against-deinagkistrodon-acutus-venom
#16
Jinhua Liu, Qiyi He, Wenwen Wang, Bin Zhou, Bo Li, Yingfeng Zhang, Cong Luo, Diancheng Chen, Jia Tang, Xiaodong Yu
BACKGROUND: The five-paced pit viper (Deinagkistrodon acutus), endemic to China and northern Vietnam, is responsible for most snakebites in the Chinese territory. Antivenom produced from horses is the main treatment for snakebites, but it may cause numerous clinical side effects and have other disadvantages involved in their production such as the welfare of animals. The present study was conducted aiming to develop an alternative antibody (IgY) from the egg yolk of leghorn chickens immunized with snake venom...
2017: Journal of Venomous Animals and Toxins Including Tropical Diseases
https://www.readbyqxmd.com/read/28396148/dok1-ppargamma-pathway-mediates-anti-tumor-ability-of-all-trans-retinoic-acid-in-breast-cancer-mcf-7%C3%A2-cells
#17
Xiaojun Ding, Wenjie Wang, Min Wang, Jiao Wu, Yao Feng
Previous studies have showed the anticancer effect of the all-trans retinoic acid (ATRA) in many tumors including breast cancer; however, the underlying molecular mechanism is still poorly understood. This study experimentally revealed that ATRA treatment inhibited MCF-7 cell proliferation and promoted its apoptosis, along with an enhanced expression of docking protein 1 (DOK1). ATRA's effects on cell proliferation and apoptosis were prevented by DOK1 knockdown. In addition, the genetic silence of DOK1 can inhibit PPARγ expression and its activity...
April 7, 2017: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/28394339/nspc1-promotes-cancer-stem-cell-self-renewal-by-repressing-the-synthesis-of-all-trans-retinoic-acid-via-targeting-rdh16-in-malignant-glioma
#18
P-S Hu, Q-S Xia, F Wu, D-K Li, Y-J Qi, Y Hu, Z-Z Wei, S-S Li, N-Y Tian, Q-F Wei, L-J Shen, B Yin, T Jiang, J-G Yuan, B-Q Qiang, W Han, X-Z Peng
Polycomb group (PcG) proteins play an important role in development and stem cell maintenance, and their dysregulation have been closely linked to oncogenesis and cancer stem cell phenotypes. Here, we found that nervous system polycomb 1 (NSPc1) was highly expressed in stem cell-like glioma cells (SLCs). Knockdown of NSPc1 in SLCs resulted in impaired neurosphere formation and self-renewal abilities, down-regulated expression of stemness markers such as NESTIN, CD133 and SOX2, and decreased capacity to propagate subcutaneous xenografts...
April 10, 2017: Oncogene
https://www.readbyqxmd.com/read/28387360/regulatory-role-of-g9a-and-lsd1-in-the-transcription-of-olfactory-receptors-during-leukaemia-cell-differentiation
#19
Hyeonsoo Jung, Yun-Cheol Chae, Ji-Young Kim, Oh-Seok Jeong, Hoon Kook, Sang-Beom Seo
Recent studies have reported the ectopic expression of olfactory receptors (ORs) in non-olfactory tissues, however, their physiological roles were not well elucidated. ORs are expressed in and function in different types of cancers. Here, we identified that the H3K9me2 levels of several OR promoters decreased during differentiation in the HL-60, human myeloid leukaemia cell line, by all-trans-retinoic acid (ATRA). We found that the differential OR promoters H3K9me2 levels were regulated by G9a and LSD1, resulting in the decrease of ORs transcription during HL-60 differentiation...
April 7, 2017: Scientific Reports
https://www.readbyqxmd.com/read/28375930/retinoic-acid-receptor-%C3%AE-a-potential-therapeutic-target-in-retinoic-acid-treatment-of-endometrial-cancer
#20
Keita Tsuji, Hiroki Utsunomiya, Yasuhiro Miki, Mayu Hanihara, Misaki Fue, Kiyoshi Takagi, Mitsuo Nishimoto, Fumihiko Suzuki, Nobuo Yaegashi, Takashi Suzuki, Kiyoshi Ito
OBJECTIVE: Several studies have reported that retinoic acid (RA) might be used to treat malignancies. The effects of RA are mediated by the RA receptor (RAR), and RARα/RARβ especially acts as a tumor suppressor. However, little is known about its role in human endometrial cancer. MATERIALS AND METHODS: In this study, we examined the effects of all-trans RA (ATRA) on progression of human endometrial cancer cell line, RL95-2 and Hec1A. We then examined the expression of RARα and RARβ in 50 endometrial cancer tissues by using immunohistochemistry...
May 2017: International Journal of Gynecological Cancer
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