Search our Database of Scientific Publications and Authors

I’m looking for a

    2934 results match your criteria Vitamin A Toxicity

    1 OF 59

    A Possible Link Between Pyriproxyfen and Microcephaly.
    PLoS Curr 2017 Nov 27;9. Epub 2017 Nov 27.
    Department of Complex Systems, New England Complex Systems Institute, Cambridge, MA, USA.
    The Zika virus has been the primary suspect in the large increase in incidence of microcephaly in 2015-6 in Brazil. While evidence for Zika being the cause of some of the cases is strong, its role as the primary cause of the large number of cases in Brazil has not been confirmed. Recently, the disparity between the incidences in different geographic locations has led to questions about the virus's role. Read More

    Teratogenic potential of nanoencapsulated vitamin A evaluated on an alternative model organism, the tunicate Ciona intestinalis.
    Int J Food Sci Nutr 2018 Jan 16:1-9. Epub 2018 Jan 16.
    a Department of Environmental Science and Policy , University of Milan , Milan , Italy.
    Nano-encapsulation is a technology used to pack substances in order to enhance their stability and bioavailability, but this packing may interact with living systems, causing unexpected toxicity. Vitamin A (vit A) is a substance that has received attention, because in developed countries, the increasing availability of supplements is leading to its excessive intake. This study aims to compare teratogenic effects caused by exposure to the traditional formulation of vit A versus nano-encapsulated vit A. Read More

    Hypercalcemia and acute renal insufficiency following use of a veterinary supplement.
    J Bras Nefrol 2017 Oct-Dec;39(4):467-469
    Universidade Federal de Santa Catarina, Centro de Ciências da Saúde, Florianópolis - SC, Brazil.
    A previously healthy 24 yo male presented with a two-month history of epigastric pain, nausea, vomiting, fatigue and malaise. He reported abuse of different substances, including an injectable veterinary vitamin compound, which contains high doses of vitamin A, D and E, and an oily vehicle that induces local edema and enhances muscle volume. Serum creatinine was 3. Read More

    Retinoid Expression in Onchocercal Skin Disease: Pilot Study.
    Infect Dis (Auckl) 2017 20;10:1178633617731741. Epub 2017 Sep 20.
    Tukuyu Research Centre, National Institute for Medical Research, Tanzania, Tukuyu, Tanzania.
    Based on the observation that the parasiteselectively absorbs vitamin A from the host, and the known toxicity of vitamin A in higher concentration, it was hypothesized that dying microfilariae (mf) release their stores of vitamin A (retinoids) into the host circulation in toxic concentrations, inducing the signs and symptoms of onchocerciasis. We conducted a pilot study to test the hypothesis in Songea communities in Southern Tanzania, where mass drug administration with ivermectin had not been implemented by the time of the survey. The specific aim was to evaluate the correlation between the diagnosis of onchocerciasis and increased levels of retinoic acid at infection sites. Read More

    All-trans-retinoic acid ameliorates doxorubicin-induced cardiotoxicity: in vivo potential involvement of oxidative stress, inflammation, and apoptosis via caspase-3 and p53 down-expression.
    Naunyn Schmiedebergs Arch Pharmacol 2018 Jan 30;391(1):59-70. Epub 2017 Oct 30.
    Department of Forensic Medicine and Toxicology, Faculty of Veterinary Medicine, Damanhour University, Damanhour, 22511, Egypt.
    The present study aimed to investigate the potential protective effect of all-trans-retinoic acid (ATRA, a natural derivative of vitamin A) against doxorubicin (DOX)-induced in vivo cardiac toxicity and its underlying mechanisms. Forty male albino rats were allocated into control, ATRA (0.5 mg/kg bwt, intraperitoneally daily), DOX (2. Read More

    Excess iron: considerations related to development and early growth.
    Am J Clin Nutr 2017 Dec 25;106(Suppl 6):1600S-1605S. Epub 2017 Oct 25.
    Department of Genetics and Complex Diseases, Harvard T.H. Chan School of Public Health, Boston, MA
    What effects might arise from early life exposures to high iron? This review considers the specific effects of high iron on the brain, stem cells, and the process of erythropoiesis and identifies gaps in our knowledge of what molecular damage may be incurred by oxidative stress that is imparted by high iron status in early life. Specific areas to enhance research on this topic include the following: longitudinal behavioral studies of children to test associations between iron exposures and mood, emotion, cognition, and memory; animal studies to determine epigenetic changes that reprogram brain development and metabolic changes in early life that could be followed through the life course; and the establishment of human epigenetic markers of iron exposures and oxidative stress that could be monitored for early origins of adult chronic diseases. In addition, efforts to understand how iron exposure influences stem cell biology could be enhanced by establishing platforms to collect biological specimens, including umbilical cord blood and amniotic fluid, to be made available to the research community. Read More

    Vitamin A status and its determinants in patients with cystic fibrosis.
    Acta Sci Pol Technol Aliment 2017 Jul-Sep;16(3):345-354
    Department of Pediatric Gastroenterology and Metabolic Diseases, Poznan University of Medical Sciences, Poland.
    Background: Routine administration of vitamin A, recommended in CF patients, can help to prevent its deficiency. However, high vitamin A supplementation may lead to its excessive level and possible toxicity. Therefore, the aim of the present study was to assess the status of vitamin A and the determinants of its body resources in CF patients. Read More

    A transcriptomic approach for evaluating the relative potency and mechanism of action of azoles in the rat Whole Embryo Culture.
    Toxicology 2017 12 29;392:96-105. Epub 2017 Sep 29.
    National Institute of Public Health and the Environment (RIVM), 3720BA Bilthoven, the Netherlands; Institute for Risk Assessment Sciences (IRAS), Utrecht University, 3584CM Utrecht, the Netherlands.
    We evaluated the effect of six azoles on embryonic development in the rat whole embryo culture (WEC). Using the total morphological scoring system (TMS), we calculated the IDconcentration (effective dose for 10% decrease in TMS). For evaluating gene specific responses, we combined previously and newly collected transcriptomics data of rat WEC exposed to a total of twelve azoles at their IDfor 4h. Read More

    Hepatic stellate cell-targeted imatinib nanomedicine versus conventional imatinib: A novel strategy with potent efficacy in experimental liver fibrosis.
    J Control Release 2017 Nov 28;266:226-237. Epub 2017 Sep 28.
    Department of Pharmacology and Toxicology, Faculty of Pharmacy, Cairo University, Cairo, Egypt.
    Liver fibrosis is a global health problem without approved treatment. Imatinib inhibits two key profibrotic pathways; platelet-derived growth factor (PDGF) and transforming growth factor-beta (TGF-β) and thus can be used to treat liver fibrosis. However, conventional imatinib therapy is hampered by low concentration at target tissue and increased toxicity to other tissues especially heart, lung and liver. Read More

    HOXA9 is critical in the proliferation, differentiation, and malignancy of leukaemia cells both in vitro and in vivo.
    Cell Biochem Funct 2017 Oct 29;35(7):433-440. Epub 2017 Sep 29.
    Department of Cardiology, Yishui Center Hospital, Linyi, Shandong Province, China.
    Progress in the understanding of the molecular mechanism for acute myeloid leukaemia is of great significance to generate new potential targets for treatment. Recent studies showed that HOXA9, a homeodomain-containing transcription factor, is commonly deregulated in acute leukaemia. In this study, we elucidated the direct correlation between HoxA9 expression and progression of leukaemia using 2 different types of leukaemia cells HL-60 and MOLT-3. Read More

    Retinoic acid postconsolidation therapy for high-risk neuroblastoma patients treated with autologous haematopoietic stem cell transplantation.
    Cochrane Database Syst Rev 2017 08 25;8:CD010685. Epub 2017 Aug 25.
    Pediatric Oncology and Hematology, Children's Hospital, University of Cologne, Kerpener Str. 62, Cologne, Germany, 50937.
    Background: Neuroblastoma is a rare malignant disease and mainly affects infants and very young children. The tumours mainly develop in the adrenal medullary tissue, with an abdominal mass as the most common presentation. About 50% of patients have metastatic disease at diagnosis. Read More

    Double sex and mab-3 related transcription factor 1 regulates differentiation and proliferation in dairy goat male germline stem cells.
    J Cell Physiol 2018 Mar 13;233(3):2537-2548. Epub 2017 Sep 13.
    College of Veterinary Medicine, Northwest A&F University, Shaanxi Centre of Stem Cells Engineering & Technology, Yangling, Shaanxi, China.
    The protein encoded by double sex and mab-3 related transcription factor 1 (Dmrt1) gene contains a double sex/mab-3 domain, which was considered as one of the most conservative structures in sex determination. However, its effect on spermatogenesis of dairy goat spermatogonial stem cells (SSCs) remains to be clarified. For the first time, the roles of Dmrt1 in spermatogenesis of livestock are highlighted. Read More

    All--retinoic acid-mediated cytoprotection in LLC-PKrenal epithelial cells is coupled to-ERK activation in a ROS-independent manner.
    Am J Physiol Renal Physiol 2017 Dec 2;313(6):F1200-F1208. Epub 2017 Aug 2.
    Southwest Environmental Health Sciences Center, Department of Pharmacology and Toxicology, College of Pharmacy, University of Arizona, Tucson, Arizona; and.
    Although all--retinoic acid (ATRA) provides protection against a variety of conditions in vivo, particularly ischemia, the molecular mechanisms underpinning these effects remain unclear. The present studies were designed to assess potential mechanisms by which ATRA affords cytoprotection against renal toxicants in LLC-PKcells. Pretreatment of LLC-PKcells with ATRA (25 μM) for 24 h afforded cytoprotection against oncotic cell death induced by-aminophenol (PAP), 2-(glutathion--yl)hydroquinone (MGHQ), and iodoacetamide but not against apoptotic cell death induced by cisplatin. Read More

    Malaria, Epstein-Barr virus infection and the pathogenesis of Burkitt's lymphoma.
    Int J Cancer 2017 Nov 24;141(9):1849-1855. Epub 2017 Jul 24.
    Chief, Division of Hematology, Center for Cancer and Blood Disorders, Children's National Medical Center, Associate Professor of Pediatrics, George Washington University School of Medicine and Health Sciences, Washington, DC.
    A geographical and causal connection has long been recognized between malaria, Epstein-Barr virus (EBV) infection and Burkitt's lymphoma (BL), but the underlying mechanisms remain obscure. Potential clues are that the malaria parasite Plasmodium falciparum selectively absorbs vitamin A from the host and depends on it for its biological activities; secondly, alterations in vitamin A (retinoid) metabolism have been implicated in many forms of cancer, including BL. The first author has proposed that the merozoite-stage malaria parasite, emerging from the liver, uses its absorbed vitamin A as a cell membrane destabilizer to invade the red blood cells, causing anemia and other signs and symptoms of the disease as manifestations of an endogenous form of hypervitaminosis A (Mawson AR, Path Global Health 2013;107(3):122-9). Read More

    Comparison of phenotypic and global gene expression changes in Xenopus tropicalis embryos induced by agonists of RAR and RXR.
    Toxicol Appl Pharmacol 2017 09 6;330:40-47. Epub 2017 Jul 6.
    State Key Laboratory of Estuarine and Coastal Research, East China Normal University, Shanghai 200062, China. Electronic address:
    Retinoic acid functions through two classes of receptors, i.e., the retinoic acid receptor (RAR) and the retinoid X receptor (RXR). Read More

    Alterations in vitamin A/retinoic acid homeostasis in diet-induced obesity and insulin resistance.
    Proc Nutr Soc 2017 Nov 27;76(4):597-602. Epub 2017 Jun 27.
    University of Aberdeen,Institute of Medical Sciences,School of Medicine,Medical Sciences and Nutrition,Foresterhill Health Campus,Aberdeen,Scotland AB25 2ZD,UK.
    Vitamin A is an essential micronutrient for life and the phytochemical β-carotene, also known as pro-vitamin A, is an important dietary source of this vitamin. Vitamin A (retinol) is the parent compound of all bioactive retinoids but it is retinoic acid (RA) that is the active metabolite of vitamin A. The plasma concentration of retinol is maintained in a narrow range and its normal biological activities strictly regulated since excessive intake can lead to toxicity and thus also be detrimental to life. Read More

    Synthesis and evaluation of novel dual BRD4/HDAC inhibitors.
    Bioorg Med Chem 2017 07 17;25(14):3677-3684. Epub 2017 May 17.
    Institute of Molecular and Cellular, Biosciences, The University of Tokyo, 1-1-1 Yayoi, Bunkyo-ku, Tokyo 113-0032, Japan. Electronic address:
    Epigenetic regulation of gene expression via histone acetylation modulates many cellular processes, including apoptosis, the cell cycle, cell growth and differentiation, and inhibitors are promising drug candidates. We have previously developed inhibitors of BRD4, which recognizes acetylated lysine residue on histones and recruits transcription elongation factor to the transcription start site, while inhibitors of histone deacetylase (HDAC), which catalyzes the removal of acetyl groups on histones, are already in clinical use for cancer treatment. Based on the idea that polypharmacological agents with multiple targets would have a more robust action, we set out to develop dual BRD4/HDAC inhibitors. Read More

    Retinoic acid pre-treatment down regulates V. cholerae outer membrane vesicles induced acute inflammation and enhances mucosal immunity.
    Vaccine 2017 Jun 22;35(28):3534-3547. Epub 2017 May 22.
    Division of Bacteriology, National Institute of Cholera and Enteric Diseases, Kolkata, India. Electronic address:
    Bacterial outer membrane vesicles have been extensively investigated and considered as a next generation vaccine. Recently, we have demonstrated that the cholera pentavalent outer membrane vesicles (CPMVs) immunogen induced adaptive immunity and had a strong protective efficacy against the circulating V. cholerae strains in a mouse model. Read More

    RNA-sequencing and pathway analysis reveal alteration of hepatic steroid biosynthesis and retinol metabolism by tributyltin exposure in male rare minnow (Gobiocypris rarus).
    Aquat Toxicol 2017 Jul 8;188:109-118. Epub 2017 Apr 8.
    Henan Open Laboratory of Key Subjects of Environmental and Animal Products Safety, College of Animal Science and Technology, Henan University of Science and Technology, Henan, China.
    Tributyltin (TBT) is widely spread in aquatic ecosystems. Although adverse effects of TBT on reproduction and lipogenesis are observed in fishes, the underlying mechanisms, especially in livers, are still scarce and inconclusive. Thus, RNA-sequencing runs were performed on the hepatic libraries of adult male rare minnow (Gobiocypris rarus) after TBT exposure for 60d. Read More

    A Protocol for In Vitro High-Throughput Chemical Susceptibility Screening in Differentiating NT2 Stem Cells.
    Methods Mol Biol 2017 ;1601:61-70
    Friedrich-Alexander University (FAU) Erlangen-Nürnberg, Institute of Medical Biotechnology, Paul-Gordan-Street 3, 91052, Erlangen, Germany.
    The incidence of neurological diseases including learning and developmental disorders has increased in recent years. Concurrently, the number and volume of worldwide registered and traded chemicals have also increased. There is a broad consensus that the developing brain is particularly sensitive to damage by chemicals and that evaluation of chemicals for developmental toxicity or neurotoxicity is critical to human health. Read More

    All-Trans Retinoic Acid Ameliorates Arsenic-Induced Oxidative Stress and Apoptosis in the Rat Uterus by Modulating MAPK Signaling Proteins.
    J Cell Biochem 2017 Nov 30;118(11):3796-3809. Epub 2017 May 30.
    Department of Zoology, University of Calcutta, 35 Ballygunge Circular Road, Kolkata 700 019, India.
    Exposure to arsenic leads to inhibition of the anti-oxidant defense mechanism of the body. Reactive oxygen species generated in response to arsenic causes reproductive failures in exposed females and also acts as an inducer of apoptosis. As a prospective remedial agent, all-trans retinoic acid (ATRA) was assessed for reversing arsenic-induced oxidative stress and apoptosis. Read More

    Ameliorated Effects of (-)-Epigallocatechin Gallate Against Toxicity Induced by Vanadium in the Kidneys of Wistar Rats.
    Biol Trace Elem Res 2017 Dec 29;180(2):239-245. Epub 2017 Mar 29.
    Laboratory of Animal Ecophysiology, Department of Life Science, Faculty of Science, University of Sfax, PB 802, 3018, Sfax, Tunisia.
    The aim of the study was to assess the protective effect of (-)-epigallocatechin gallate (EGCG), a flavonoid abundant in green tea, against ammonium metavanadate (AMV)-induced oxidative stress in male Wistar rats. Four groups of animals have been used, a control group and three test groups. In the first test group, AMV was intra-peritoneally (i. Read More

    Inhibition of gap junction intercellular communication is involved in silica nanoparticles-induced H9c2 cardiomyocytes apoptosis via the mitochondrial pathway.
    Int J Nanomedicine 2017 20;12:2179-2188. Epub 2017 Mar 20.
    Department of Toxicology, Shandong Academy of Occupational Health and Occupational Medicine, Shandong Academy of Medical Sciences.
    Gap junction intercellular communication (GJIC) between cardiomyocytes is essential for synchronous heart contraction and relies on connexin-containing channels. Connexin 43 (Cx43) is a major component involved in GJIC in heart tissue, and its abnormal expression is closely associated with various cardiac diseases. Silica nanoparticles (SNPs) are known to induce cardiovascular toxicity. Read More

    Lower concentrations of receptor for advanced glycation end products and epiregulin in amniotic fluid correlate to chemically induced cleft palate in mice.
    Environ Toxicol Pharmacol 2017 Apr 28;51:45-50. Epub 2017 Feb 28.
    The State Key Laboratory Breeding Base of Basic Science of Stomatology & Key Laboratory of Oral Biomedicine Ministry of Education, School and Hospital of Stomatology, Wuhan University, Wuhan, PR China. Electronic address:
    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. Read More

    Serum Folate, Vitamin B-12, Vitamin A, γ-Tocopherol, α-Tocopherol, and Carotenoids Do Not Modify Associations between Cadmium Exposure and Leukocyte Telomere Length in the General US Adult Population.
    J Nutr 2017 04 8;147(4):538-548. Epub 2017 Mar 8.
    Department of Environmental and Occupational Health, Milken Institute School of Public Health, George Washington University, Washington, DC.
    Leukocyte telomere length (LTL) is a biomarker of the aging process and is associated with the risk of chronic disease. Higher exposure to cadmium may be associated with shorter LTL, and adequate nutrient concentrations may be associated with longer LTL; however, the potential interaction between metals and nutrients on LTL has yet to be examined.The objective of this study was to evaluate whether serum concentrations of vitamins and carotenoids were associated with LTL, and whether they modified the association between blood cadmium and LTL in the US NHANES (1999-2002). Read More

    Inorganic mercury prevents the differentiation of SH-SY5Y cells: Amyloid precursor protein, microtubule associated proteins and ROS as potential targets.
    J Trace Elem Med Biol 2017 May 6;41:119-128. Epub 2017 Feb 6.
    Departmento de Fisiología, Biofísica y Neurociencias, Centro de Investigación y de Estudios Avanzados del IPN, Mexico City, 07360, Mexico. Electronic address:
    Exposure to mercury (Hg) occurs through different pathways and forms including methylmecury (MeHg) from seafood and rice, ethylmercury (EtHg), and elemental Hg (Hg) from dental amalgams and artisanal gold mining. Once in the brain all these forms are transformed to inorganic Hg (I-Hg), where it bioaccumulates and remains for long periods. Hg is a well-known neurotoxicant, with its most damaging effects reported during brain development, when cellular key events, such as cell differentiation take place. Read More

    Carotenoid glycosides from cyanobacteria are teratogenic in the zebrafish (Danio rerio) embryo model.
    Chemosphere 2017 May 31;174:478-489. Epub 2017 Jan 31.
    Department of Chemistry and Biochemistry, Marine Science Program, Florida International University, 3000 NE 151st Street, North Miami, FL 33181, USA. Electronic address:
    Toxigenicity of cyanobacteria is widely associated with production of several well-described toxins that pose recognized threats to human and ecosystem health as part of both freshwater eutrophication, and episodic blooms in freshwater and coastal habitats. However, a preponderance of evidence indicates contribution of additional bioactive, and potentially toxic, metabolites. In the present study, the zebrafish (Danio rerio) embryo was used as a model of vertebrate development to identify, and subsequently isolate and characterize, teratogenic metabolites from two representative strains of C. Read More

    β-N-Methylamino-L-alanine (BMAA) perturbs alanine, aspartate and glutamate metabolism pathways in human neuroblastoma cells as determined by metabolic profiling.
    Amino Acids 2017 May 4;49(5):905-919. Epub 2017 Feb 4.
    Department of Pharmaceutical Biosciences, Uppsala University, Box 591, 751 23, Uppsala, Sweden.
    β-Methylamino-L-alanine (BMAA) is a non-proteinogenic amino acid that induces long-term cognitive deficits, as well as an increased neurodegeneration and intracellular fibril formation in the hippocampus of adult rodents following short-time neonatal exposure and in vervet monkey brain following long-term exposure. It has also been proposed to be involved in the etiology of neurodegenerative disease in humans. The aim of this study was to identify metabolic effects not related to excitotoxicity or oxidative stress in human neuroblastoma SH-SY5Y cells. Read More

    Hepatic Detoxification of Bisphenol A is Retinoid-Dependent.
    Toxicol Sci 2017 05;157(1):141-155
    Department of Medicine, Columbia University, New York, NY, USA.
    Bisphenol A (BPA, 2,2-bis(4-hydroxyphenyl) propane) is a widely used industrial chemical. The extensive distribution of BPA in the environment poses risks to humans. However, the molecular mechanisms underlying BPA toxicity as well as its effective detoxification and elimination are not well understood. Read More

    [Very Severe Differentiation Syndrome in Low Risk Acute Promyelocytic Leukemia - A Peril of Differentiating Therapy].
    Dtsch Med Wochenschr 2017 Jan 23;142(2):111-114. Epub 2017 Jan 23.
    Universitätsmedizin Mannheim, III. Medizinische Klinik, Hämatologie und internistische Onkologie, Mannheim.
     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). During the combination therapy with ATRA and ATO, the patient developed a severe differentiation syndrome and hyperleukocytosis. Read More

    Excess Retinoic Acid Induces Fusion of Centra by Degenerating Intervertebral Ligament Cells in Japanese flounder, Paralichthys olivaceus.
    J Exp Zool B Mol Dev Evol 2016 Dec 18;326(8):464-473. Epub 2017 Jan 18.
    Laboratory of Marine Life Science and Genetics, Graduate School of Agricultural Science, Tohoku University, Sendai, Japan.
    In marine aquaculture fish, excessive supplement of vitamin A (VA) to zooplanktons for larval culture and experimental exposure of larvae to retinoic acid (RA: active form of VA) have been known to cause vertebral deformity. However, the tissues in the developing vertebral column that are affected by RA and the progression of vertebral deformity remain undetermined. To examine these questions, we histologically traced the progress of vertebral deformity induced by RA in Japanese flounder (Paralichthys olivaceus). Read More

    Congenital insensitivity to pain with anhidrosis in Sudanese children.
    Sudan J Paediatr 2016 ;16(2):80-85
    Sea Ports Corporation Hospital and Red Sea University , Port Sudan , Sudan.
    Congenital insensitivity to pain with anhidrosis (CIPA), also called hereditary sensory and autonomic neuropathy type IV (HSAN-IV), is an extremely rare autosomal recessive disease. It is characterized by insensitivity to pain, inability to sweat, episodes of hyperpyrexia, and intellectual disability. These factors render the affected persons to repeatedly injure and traumatise themselves to the degree that they become disabled. Read More

    All-Trans Retinoic Acid supplementation prevents cardiac fibrosis and cytokines induced by Methylglyoxal.
    Glycoconj J 2017 Apr 14;34(2):255-265. Epub 2017 Jan 14.
    Department of Biotechnology, School of Chemical & Biotechnology, SASTRA University, Thanjavur, 613 401, Tamil Nadu, India.
    Methylglyoxal (MG), a metabolic intermediate of glycolysis is a precursor for endogeneous production of advanced glycation end-products. The increased production of MG have negative influence over the structure and function of different biomolecules and thus plays an important role in the pathogenesis of diabetic cardiac complications. Retinoic acid (RA), an active metabolite of vitamin A, has a major role in preventing cardiac remodeling and ventricular fibrosis. Read More

    ApoSOD1 lacking dismutase activity neuroprotects motor neurons exposed to beta-methylamino-L-alanine through the Ca/Akt/ERK1/2 prosurvival pathway.
    Cell Death Differ 2017 Mar 13;24(3):511-522. Epub 2017 Jan 13.
    Division of Pharmacology, Department of Neuroscience, Reproductive and Odontostomatological Sciences, School of Medicine, "Federico II" University of Naples, Via Sergio Pansini 5, Naples, Italy.
    Amyotrophic lateral sclerosis (ALS) is a severe human adult-onset neurodegenerative disease affecting lower and upper motor neurons. In >20% of cases, the familial form of ALS is caused by mutations in the gene encoding Cu,Zn-superoxide dismutase (SOD1). Interestingly, administration of wild-type SOD1 to SOD1transgenic rats ameliorates motor symptoms through an unknown mechanism. Read More

    Retinoic Acid Protects and Rescues the Development of Zebrafish Embryonic Retinal Photoreceptor Cells from Exposure to Paclobutrazol.
    Int J Mol Sci 2017 Jan 11;18(1). Epub 2017 Jan 11.
    Department of Biological Sciences, National Sun Yat-Sen University, Kaohsiung City 80424, Taiwan.
    Paclobutrazol (PBZ) is a widely used fungicide that shows toxicity to aquatic embryos, probably through rain-wash. Here, we specifically focus on its toxic effect on eye development in zebrafish, as well as the role of retinoic acid (RA), a metabolite of vitamin A that controls proliferation and differentiation of retinal photoreceptor cells, in this toxicity. Embryos were exposed to PBZ with or without RA from 2 to 72 h post-fertilization (hpf), and PBZ-treated embryos (2-72 hpf) were exposed to RA for additional hours until 120 hpf. Read More

    Hyperbaric Oxygen Prevents Cognitive Impairments in Mice Induced by D-Galactose by Improving Cholinergic and Anti-apoptotic Functions.
    Neurochem Res 2017 Apr 11;42(4):1240-1253. Epub 2017 Jan 11.
    Department of Cardiology, The People's Hospital of Guangxi Zhuang Autonomous Region, 6 Taoyuan Road, Nanning, 530021, Guangxi, People's Republic of China.
    Our previous study demonstrated that hyperbaric oxygen (HBO) improved cognitive impairments mainly by regulating oxidative stress, inflammatory responses and aging-related gene expression. However, a method for preventing cognitive dysfunction has yet to be developed. In the present study, we explored the protective effects of HBO on the cholinergic system and apoptosis in D-galactose (D-gal)-treated mice. Read More

    Modulation of Benzo[a]Pyrene Induced Anxiolytic-Like Behavior by Retinoic Acid in Zebrafish: Involvement of Oxidative Stress and Antioxidant Defense System.
    Neurotox Res 2017 May 6;31(4):493-504. Epub 2017 Jan 6.
    Neurobiology Laboratory, Department of Zoology, School of Life Sciences, Ravenshaw University, College Square, Cuttack, Odisha, 753003, India.
    Benzo[a]pyrene (B[a]P) is commonly associated with oxidative stress-induced neurotoxicity. Retinoic acid (RA) has been shown to exhibit neuroprotection in brain, and disruption of RA signaling via excess or deficient RA can lead to oxidative stress. B[a]P contamination in aquatic environment has been shown to lower the internal RA level. Read More

    Role of vitamin A metabolism in IIH: Results from the idiopathic intracranial hypertension treatment trial.
    J Neurol Sci 2017 Jan 10;372:78-84. Epub 2016 Nov 10.
    Neurology, University of Iowa School of Medicine, Iowa City, IA, United States.
    Introduction: Vitamin A and its metabolites (called retinoids) have been thought to play a role in the development of idiopathic intracranial hypertension (IIH). The IIH Treatment Trial (IIHTT) showed the efficacy of acetazolamide (ACZ) in improving visual field function, papilledema grade, quality of life and cerebrospinal fluid (CSF) pressure. We postulated that IIH patients would demonstrate elevated measures of vitamin A metabolites in the serum and CSF. Read More

    Marginal Vitamin A Deficiency Exacerbates Memory Deficits Following Aβ1-42 Injection in Rats.
    Curr Alzheimer Res 2017 ;14(5):562-570
    No.136 Zhongshan Er Road, Yuzhong District, Chongqing, 400014, China.
    Background: Although clinical vitamin A deficiency (VAD), which is a public health problem developing throughout the world, has been well controlled, marginal vitamin A deficiency (MVAD) is far more prevalent, especially among pregnant women and preschool children in China. Increasing evidence suggests that VAD is involved in the pathogenesis of Alzheimer's disease (AD). However, whether MVAD, beginning early in life, increases the risk of developing AD has yet to be determined. Read More

    Different doses of dexmedetomidine reduce plasma cytokine production, brain oxidative injury, PARP and caspase expression levels but increase liver oxidative toxicity in cerebral ischemia-induced rats.
    Brain Res Bull 2017 Apr 19;130:1-9. Epub 2016 Dec 19.
    Unit of Anesthesiology and Reanimation, Department of Oral and Maxillofacial Surgery, Faculty of Dentistry, Suleyman Demirel University, Isparta, Turkey.
    Cerebral ischemia-induced progression of brain, liver, and erythrocyte oxidative injuries might be modulated by dexmedetomidine (DEX) as a potent antioxidant and anti-inflammatory drug. The present study was conducted to explore whether two different doses of DEX protect against plasma cytokine and brain, liver and erythrocyte oxidative toxicity and apoptosis in cerebral ischemia-induced rats. Forty-two rats were equally divided into 7 groups. Read More

    Network-guided modeling allows tumor-type independent prediction of sensitivity to all-trans-retinoic acid.
    Ann Oncol 2017 03;28(3):611-621
    Laboratory of Molecular Biology, IRCCS-Istituto di Ricerche Farmacologiche Mario Negri, Milano.
    Background: All-trans-retinoic acid (ATRA) is a differentiating agent used in the treatment of acute-promyelocytic-leukemia (APL) and it is under-exploited in other malignancies despite its low systemic toxicity. A rational/personalized use of ATRA requires the development of predictive tools allowing identification of sensitive cancer types and responsive individuals.

    Materials And Methods: RNA-sequencing data for 10 080 patients and 33 different tumor types were derived from the TCGA and Leucegene datasets and completely re-processed. Read More

    Retinoid-like compounds produced by phytoplankton affect embryonic development of Xenopus laevis.
    Ecotoxicol Environ Saf 2017 Apr 22;138:32-38. Epub 2016 Dec 22.
    RECETOX - Research Centre for Toxic Compounds in the Environment, Masaryk University, Faculty of Science, Brno, Czech Republic.
    Teratogenic effects, which were remarkably similar to those induced by retinoic acids, have been seen in wild frogs indicating possible source of retinoids in the environment. Recent studies indicate that some cyanobacterial species can contain teratogenic retinoic acids (RAs) and their analogues. Retinoids are known to regulate important processes such as differentiation, development, and embryogenesis. Read More

    Modulation of urinary siderophores by the diet, gut microbiota and inflammation in mice.
    J Nutr Biochem 2017 Mar 2;41:25-33. Epub 2016 Dec 2.
    Department of Nutritional Sciences, The Pennsylvania State University, University Park, PA 16802; Department of Medicine, The Pennsylvania State University Medical Center, Hershey, PA 17033. Electronic address:
    Mammalian siderophores are believed to play a critical role in maintaining iron homeostasis. However, the properties and functions of mammalian siderophores have not been fully clarified. In this study, we have employed Chrome Azurol S (CAS) assay which is a well-established method for bacterial siderophores study, to detect and quantify mammalian siderophores in urine samples. Read More

    Effectiveness and safety of nutritional supplements in the treatment of hereditary retinal dystrophies: a systematic review.
    Eye (Lond) 2017 Feb 9;31(2):273-285. Epub 2016 Dec 9.
    Red de Investigación en Servicios de Salud en Enfermedades Crónicas (REDISSEC), Madrid, Spain.
    The hereditary retinal dystrophies (HRDs) are a group of genetically determined disorders that result in loss of the visual function. There is a lack of standard pharmacological treatments or widely accepted nutritional recommendations. The objective of this review is to summarise the scientific evidence on the effectiveness and safety of nutritional supplements for the treatment of HRDs. Read More

    Inhibition of IKKβ by celastrol and its analogues - an in silico and in vitro approach.
    Pharm Biol 2017 Dec;55(1):368-373
    a Department of Biochemistry , VRR Institute of Biomedical Science (Affiliated to University of Madras) , Chennai , Tamilnadu , India.
    Context: Alzheimer's disease (AD) is the most common form of dementia affecting the aged population and neuroinflammation is one of the most observed AD pathologies. NF-κB is the central regulator of inflammation and inhibitor κB kinase (IKK) is the converging point in NF-κB activation. Celastrol is a natural triterpene used as a treatment for inflammatory conditions. Read More

    Vitamin A and Vision.
    Subcell Biochem 2016 ;81:231-259
    Departments of Ophthalmology and Biochemistry, School of Medicine, University of Washington, 98195, Seattle, WA, USA.
    Visual systems detect light by monitoring the effect of photoisomerization of a chromophore on the release of a neurotransmitter from sensory neurons, known as rod and cone photoreceptor cells in vertebrate retina. In all known visual systems, the chromophore is 11-cis-retinal complexed with a protein, called opsin, and photoisomerization produces all-trans-retinal. In mammals, regeneration of 11-cis-retinal following photoisomerization occurs by a thermally driven isomerization reaction. Read More

    Functions of Intracellular Retinoid Binding-Proteins.
    Subcell Biochem 2016;81:21-76
    Graduate Program in Metabolic Biology, Department of Nutritional Sciences and Toxicology, University of California, 119 Morgan Hall, 94720, Berkeley, CA, USA.
    Multiple binding and transport proteins facilitate many aspects of retinoid biology through effects on retinoid transport, cellular uptake, metabolism, and nuclear delivery. These include the serum retinol binding protein sRBP (aka Rbp4), the plasma membrane sRBP receptor Stra6, and the intracellular retinoid binding-proteins such as cellular retinol-binding proteins (CRBP) and cellular retinoic acid binding-proteins (CRABP). sRBP transports the highly lipophilic retinol through an aqueous medium. Read More

    All-trans retinoic acid (ATRA) prevents lipopolysaccharide-induced neuroinflammation, amyloidogenesis and memory impairment in aged rats.
    J Neuroimmunol 2016 11 8;300:21-29. Epub 2016 Oct 8.
    University of Sciences and Technology Houari Boumediene (USTHB), Faculty of Biological Sciences, Cellular and Molecular Biology Laboratory, Cytokines and NO Synthases, Immunity and Pathogeny Team, Algiers, Algeria. Electronic address:
    We aimed to investigate preventive effects of All-trans retinoic acid (ATRA) on a lipopolysaccharide (LPS)-induced aged neuroinflammation model. We analyzed behavior, systemic nitric oxide (NO) production, cerebral NO synthase (NOS2) and β-amyloid (Aβ) 1-42 expression and tissue integrity in the neuroinflammation model pretreated with ATRA (150μg/ml/rat/day) for 30days. Our results showed that LPS treatment (500μg/kg/day) for 7days disturbed memory, enhanced systemic NO production, NOS2 and Aβ 1-42 cerebral expression and generated an Alzheimer's disease (AD)-like neuronal degeneration. Read More

    NRF2 Mediates Neuroblastoma Proliferation and Resistance to Retinoic Acid Cytotoxicity in a Model of In Vitro Neuronal Differentiation.
    Mol Neurobiol 2016 Nov 5;53(9):6124-6135. Epub 2015 Nov 5.
    Departamento de Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Ramiro Barcelos, 2600, Porto Alegre, RS, 90035-035, Brazil.
    Retinoic acid (RA) morphogenetic properties have been used in different kinds of therapies, from neurodegenerative disorders to some types of cancer such as promyelocytic leukemia and neuroblastoma. However, most of the pathways responsible for RA effects remain unknown. To investigate such pathways, we used a RA-induced differentiation model in the human neuroblastoma cells, SH-SY5Y. Read More

    1 OF 59