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retinoid investigation

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https://www.readbyqxmd.com/read/29326066/novel-everolimus-loaded-nanocarriers-for-topical-treatment-of-murine-experimental-autoimmune-uveoretinitis-eau
#1
Maren Kasper, Doris Gabriel, Michael Möller, Dirk Bauer, Lena Wildschütz, Herve Courthion, Michael R R Böhm, Martin Busch, Karin Loser, Solon Thanos, Robert Gurny, Arnd Heiligenhaus
In the present study, therapeutic effect of topically applied everolimus (EV)-loaded methoxy-poly(ethylene-glycol)-hexyl substituted poly (lactic acid) (mPEGhexPLA) nanocarriers on experimental autoimmune uveitis (EAU) were investigated. EAU was induced in B10.RIII mice via immunization with human interphotoreceptor retinoid-binding protein peptide 161-180 (hIRBPp161-180) in complete Freund's adjuvant. Everolimus-loaded mPEGhexPLA (EV/mPEGhexPLA) nanocarriers were prepared by using a solvent evaporation method...
January 8, 2018: Experimental Eye Research
https://www.readbyqxmd.com/read/29305858/identification-of-a-candidate-enhancer-for-dmrt3-involved-in-spastic-cerebral-palsy-pathogenesis
#2
Naoto Kubota, Toshifumi Yokoyama, Nobuhiko Hoshi, Mikita Suyama
Cerebral palsy (CP) is a major neuronal disease and the most common movement disorder in children. Although environmental factors leading to CP have been greatly investigated, the genetic mechanism underlying CP is not well understood. Here we focused on two clinical reports that characterized a deletion involving the KANK1 gene locus in the 9p24.3 region. One report shows spastic CP and the other shows no spastic CP phenotype. Based on the epigenetic status and evolutionary conservation, we first found a functional genomic element at the noncoding region that was deleted only in patients with spastic CP...
January 3, 2018: Biochemical and Biophysical Research Communications
https://www.readbyqxmd.com/read/29298821/physiological-and-pathological-implications-of-retinoid-action-in-the-endometrium
#3
Yanwen Jiang, Lu Chen, Robert Taylor, Chunjin Li, Xu Zhou
Retinol (vitamin A) and its derivatives, collectively known as retinoids, are required for maintaining vision, immunity, barrier function, reproduction, embryogenesis, and cell proliferation and differentiation. Despite the fact that most events in the endometrium are predominantly regulated by steroid hormones (estrogens and progesterone), accumulating evidence shows that retinoid signaling is also involved in the development and maintenance of the endometrium, stromal decidualization, and blastocyst implantation...
January 3, 2018: Journal of Endocrinology
https://www.readbyqxmd.com/read/29285097/mir-34a-and-mir-125b-are-upregulated-in-peripheral-blood-mononuclear-cells-from-patients-with-type-2-diabetes-mellitus
#4
Yanxin Shen, Huiling Xu, Xiaoyuan Pan, Weijiang Wu, Hui Wang, Linlin Yan, Miaomiao Zhang, Xia Liu, Sheng Xia, Qixiang Shao
Type 2 diabetes mellitus (T2DM) is a leading cause of blindness, non-traumatic amputation and end-stage renal disease, as well as a major cardiovascular risk factor. To determine whether miR-125b and miR-34a serve an important role in the development of T2DM, the current study investigated the expression profile of two microRNAs (miR-34a and miR-125b) and their relative genes in peripheral blood mononuclear cells from 73 patients with T2DM and 52 healthy donors by reverse transcription-quantitative polymerase chain reaction In addition, the association between miR-34a, miR-125b and their relevant genes expression profile were analyzed with respect to the pathogenesis of T2DM...
December 2017: Experimental and Therapeutic Medicine
https://www.readbyqxmd.com/read/29247416/%C3%AE-carotene-and-retinol-reduce-benzo-a-pyrene-induced-mutagenicity-and-oxidative-stress-via-transcriptional-modulation-of-xenobiotic-metabolizing-enzymes-in-human-hepg2-cell-line
#5
Wageh Sobhy Darwish, Yoshinori Ikenaka, Shouta Nakayama, Hazuki Mizukawa, Lesa A Thompson, Mayumi Ishizuka
Benzo[a]pyrene (B[a]P) is one of the polycyclic aromatic hydrocarbons which is formed due to smoking of foods, incomplete combustion of woods, vehicle exhausts, and cigarettes smokes. B[a]P gets entry into human and animal bodies mainly through their diets. Metabolic activation of B[a]P is required to induce mutagenesis and carcinogenesis in animal and human studies. Carotenoids and retinoids are phytochemicals that if ingested have multiple physiological interferences in the human and animal bodies. In this study, we firstly investigated the protective effects of β-carotene, β-apo-8-carotenal, retinol, and retinoic acid against B[a]P-induced mutagenicity and oxidative stress in human HepG2 cells...
December 15, 2017: Environmental Science and Pollution Research International
https://www.readbyqxmd.com/read/29208982/peretinoin-an-acyclic-retinoid-inhibits-hepatocarcinogenesis-by-suppressing-sphingosine-kinase-1-expression-in-vitro-and-in-vivo
#6
Masaya Funaki, Juria Kitabayashi, Tetsuro Shimakami, Naoto Nagata, Yuriko Sakai, Kai Takegoshi, Hikari Okada, Kazuhisa Murai, Takayoshi Shirasaki, Takeru Oyama, Taro Yamashita, Tsuguhito Ota, Yoh Takuwa, Masao Honda, Shuichi Kaneko
Sphingosine-1-phospate is a potent bioactive lipid metabolite that regulates cancer progression. Because sphingosine kinase 1 and sphingosine kinase 2 (SPHK 1/2) are both essential for sphingosine-1-phospate production, they could be a therapeutic target in various cancers. Peretinoin, an acyclic retinoid, inhibits post-therapeutic recurrence of hepatocellular carcinoma via unclear mechanisms. In this study, we assessed effects of peretinoin on SPHK expression and liver cancer development in vitro and in vivo...
December 5, 2017: Scientific Reports
https://www.readbyqxmd.com/read/29188497/bexarotene-a-selective-rxr%C3%AE-agonist-reverses-hypotension-associated-with-inflammation-and-tissue-injury-in-a-rat-model-of-septic-shock
#7
Bahar Tunctan, Sefika P Kucukkavruk, Meryem Temiz-Resitoglu, Demet S Guden, Ayse N Sari, Seyhan Sahan-Firat
Peroxisome proliferator-activated receptors (PPARs) are nuclear receptors that can activate or inhibit the expression of many target genes by forming a heterodimer complex with the retinoid X receptor (RXR). The aim of this study was to investigate effects of bexarotene, a selective RXRα agonist, on the changes in renal, cardiac, hepatic, and pulmonary expression/activity of inducible nitric oxide synthase (iNOS) and cytochrome P450 (CYP) 4F6 in relation to PPARα/β/γ-RXRα heterodimer formation in a rat model of septic shock...
November 29, 2017: Inflammation
https://www.readbyqxmd.com/read/29187070/loading-efficacy-and-binding-analysis-of-retinoids-with-milk-proteins-a-short-review
#8
D Agudelo, P Bourassa, J Bariyanga, H A Tajmir-Riahi
In this review, the loading efficacies of retinoids with milk proteins are investigated. It has been shown that milk proteins β-lactoglobulin, α- and β-caseins bind retinol and retinoic acid via hydrophobic, hydrophilic and H-bonding contacts causing minor alterations of protein secondary structure. Hydrophobic contact is predominant in retinoid-protein conjugation and several amino acids are involved in complex formation, stabilized by H-bonding network. Loading efficacy of retinoid was about 30 to 50% with retinol forming more stable protein conjugates...
November 30, 2017: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29169171/mirnas-are-unlikely-to-be-involved-in-retinoid-receptor-gene-regulation-in-pancreatic-cancer-cells
#9
Shuai Yin, Tim Bleul, Yifan Zhu, Orkhan Isayev, Jens Werner, Alexandr V Bazhin
BACKGROUND/AIMS: Retinoid receptors and retinoic acid were reported to be down-regulated in pancreatic duct adenocarcinoma (PDAC) compared to normal pancreas. Yet the mechanism of the down-regulation of retinoid receptors is not well defined. The aim of this study was to find out whether selected dysregulated miRNAs in PDAC are responsible for the decreased level of retinoid receptors. METHODS: Bioinformatics, real-time PCR, western blot analysis as well as molecular manipulation with miRNA in cells of PDAC were carried out...
November 24, 2017: Cellular Physiology and Biochemistry
https://www.readbyqxmd.com/read/29131127/pleiotropic-effects-of-white-willow-bark-and-1-2-decanediol-on-human-adult-keratinocytes
#10
Eleonora Bassino, Franco Gasparri, Luca Munaron
BACKGROUND: Acne vulgaris is a common skin defect, usually occurring during adolescence, but often it can persist in adults leaving permanent face scarring. Acne is usually treated with topical drugs, oral antibiotics, retinoids, and hormonal therapies, but medicinal plants are increasingly employed. OBJECTIVE: To investigate the protective role of white willow bark (WWB) and 1,2-decanediol (DD) on the damage caused by lipopolysaccharides (LPS) on human adult keratinocytes (HaCaT)...
November 8, 2017: Skin Pharmacology and Physiology
https://www.readbyqxmd.com/read/29128844/a-biodegradable-scaffold-enhances-differentiation-of-embryonic-stem-cells-into-a-thick-sheet-of-retinal-cells
#11
Deepti Singh, Shao-Bin Wang, Tina Xia, Laurel Tainsh, Maryam Ghiassi-Nejad, Tao Xu, Shaomin Peng, Ron A Adelman, Lawrence J Rizzolo
Retinal degeneration is a leading cause of blindness in developed countries. Stem cells can be differentiated into retinal organoids to study mechanisms of retinal degeneration, develop therapeutic agents, and potentially serve as replacement tissues. The spherical nature of these retinoids limits their utility, because the investigator lacks ready access to both sides of the neo-tissue. For tissue-replacement, spherical retinoids are unable to interact simultaneously with the host retinal pigment epithelium and remaining neurosensory retina...
October 31, 2017: Biomaterials
https://www.readbyqxmd.com/read/29128212/liver-proteomic-analysis-of-postpartum-holstein-cows-exposed-to-heat-stress-or-cooling-conditions-during-the-dry-period
#12
Amy L Skibiel, Maya Zachut, Bruno C do Amaral, Yishai Levin, Geoffrey E Dahl
Heat stress negatively affects cow performance, compromises immune function, and increases susceptibility to metabolic disorders, particularly during the dry period and as cows transition from gestation to lactation. Metabolic adaptations of the liver are critical for successful transition, yet it is unclear how heat stress affects metabolic pathways within the liver at the proteomic level. The objective of this study was to investigate the liver proteome of postpartum cows that were cooled or heat stressed during the dry period to gain insight into how protein expression is altered by prior heat stress and may contribute to performance and disease outcomes...
November 8, 2017: Journal of Dairy Science
https://www.readbyqxmd.com/read/29127736/liver-x-receptor-activation-inhibits-sglt2-mediated-glucose-transport-in-human-renal-proximal-tubular-cells
#13
Pattira Chonlaket, Teerasak Wongwan, Sunhapas Soodvilai
Liver X receptors (LXRs) are members of a nuclear receptor family consisting of two isoforms, LXR-α and LXR-β. They play a major role in energy metabolism including lipid and glucose metabolism. Recent studies reported LXRs regulate plasma glucose although the mechanism is still uncertain. The present study investigated whether LXR activation regulates sodium glucose cotransporter2 (SGLT2) in human renal proximal tubular cells. LXR agonists, T0901317 and GW3965, inhibited SGLT2-mediated glucose uptake in concentration-dependent manners...
November 11, 2017: Experimental Physiology
https://www.readbyqxmd.com/read/29113816/hdac2-suppresses-il17a-mediated-airway-remodeling-in-human-and-experimental-modeling-of-copd
#14
Tianwen Lai, Baoping Tian, Chao Cao, Yue Hu, Jiesen Zhou, Yong Wang, Yanping Wu, Zhouyang Li, Xuchen Xu, Min Zhang, Feng Xu, Yuan Cao, Min Chen, Dong Wu, Bin Wu, Chen Dong, Wen Li, Songmin Ying, Zhihua Chen, Huahao Shen
BACKGROUND: Airway remodeling is a central feature of chronic obstructive pulmonary disease (COPD), but the mechanisms underlying its development have not been fully elucidated. OBJECTIVE: To determine whether histone deacetylase (HDAC) 2 protects against cigarette smoke (CS)-induced airway remodeling through IL17A-dependent mechanisms. METHODS: Sputum samples and lung tissues were obtained from control subjects and patients with COPD. The relationships between HDAC2, IL17A, and airway remodeling were investigated...
November 4, 2017: Chest
https://www.readbyqxmd.com/read/29105092/ultraviolet-a-eye-irradiation-ameliorates-atopic-dermatitis-via-p53-and-clock-gene-proteins-in-nc-nga-mice
#15
Keiichi Hiramoto, Yurika Yamate, Satoshi Yokoyama
Atopic dermatitis (AD) is a widespread chronic skin condition that severely affects quality of life and can lead to more serious complications. Although ultraviolet (UV)A eye irradiation can exert various effects on the skin, it is unknown whether UVA can affect AD. To investigate potential associations, we used an NC/Nga mouse model of AD to study the effects of UVA eye irradiation. The eyes of mice were irradiated with a UVA dose of 100 kJ/m(2) using a FL20SBLB-A lamp. Our histological data demonstrated that AD symptoms could be ameliorated by UVA eye irradiation...
November 4, 2017: Photochemistry and Photobiology
https://www.readbyqxmd.com/read/29094450/management-of-pediatric-psoriasis-with-acitretin-a-review
#16
REVIEW
Smriti Subedi, Qian Yu, Zeyu Chen, Yuling Shi
Psoriasis is a chronic inflammatory disease of the skin which can occur at any age-group. Psoriasis in childhood is not uncommon and has genetic susceptibility but usually, an environmental trigger such as infection is thought to initiate the disease process. Pediatric psoriasis has profound effects on both physical and psychosocial health of the patient. Treatment of mild psoriasis can be done with topical therapies but those which do not respond to topical therapies can be treated with phototherapy and systemic therapies...
November 1, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/29074558/mir-6743-5p-as-a-direct-upstream-regulator-of-grim-19-enhances-proliferation-and-suppresses-apoptosis-in-glioma-cells
#17
Fang Cao, Qiang Zhang, Wei Chen, Feng Zheng, Qishan Ran, Yang He, Yang Gao, Shengtao Yao
Gene associated with retinoid-interferon-induced mortality-19 (GRIM-19) has been recognized as a tumor suppressor protein, which regulates cell growth, apoptosis and migration by signal transducer and activator of transcription 3 (STAT3) signaling pathway and non-STAT3 pathway in glioma cells. Here, we investigated the molecular mechanisms that regulated GRIM-19 expression in glioma cells. By the TargetScan algorithm, four microRNAs (miRNAs), hsa-miR-17-3p, hsa-miR-423-5p, hsa-miR-3184-5p and hsa-miR-6743-5p, were identified with the potential to bind with 3'-untranslated regions (UTR) of GRIM-19...
October 26, 2017: Bioscience Reports
https://www.readbyqxmd.com/read/29054136/combined-methylome-and-transcriptome-analysis-during-rat-hepatic-stellate-cell-activation
#18
Eva Schumacher, Silke Götze, Claus Kordes, Vladimir Benes, Dieter Häussinger
Hepatic stellate cells (HSC) are mesenchymal stem cells (MSC) of the liver. They are unique among MSC, since HSC remain in a quiescent, retinoid-storing state in the normal liver but become activated after liver injury and contribute to tissue repair. The epigenetic mechanisms accompanying the transition of HSC from a quiescent to an activated state are in the focus of the present study. We investigated the methylome and transcriptome during this process and observed profound changes. While the promoter methylation correlated negatively with gene expression, the gene body methylation revealed no clear correlation...
October 20, 2017: Stem Cells and Development
https://www.readbyqxmd.com/read/29050312/non-alcoholic-steatohepatitis-related-liver-tumorigenesis-is-suppressed-in-mice-lacking-hepatic-retinoid-storage
#19
Takayasu Ideta, Yohei Shirakami, Masaya Ohnishi, Akinori Maruta, Koki Obara, Tsuneyuki Miyazaki, Takahiro Kochi, Hiroyasu Sakai, Hiroyuki Tomita, Takuji Tanaka, William S Blaner, Masahito Shimizu
Non-alcoholic fatty liver disease has become one of the most common causes of chronic liver disease that can develop into a more serious form, non-alcoholic steatohepatitis, leading to liver cirrhosis and hepatocellular carcinoma. Although hepatic retinoid stores are progressively lost during the development of liver disease, how this affects steatohepatitis and its related hepatocarcinogenesis is unknown. In order to investigate these, we used subcutaneous injection of streptozotocin (0.2 mg/body) and high-fat diet to induce steatohepatitis and hepatic tumorigenesis in lecithin:retinol acyltransferase -deficient mice (n = 10), which lack stored retinoid in the liver, and control mice (n = 12)...
September 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29042966/effects-of-rpe-conditioned-medium-on-the-differentiation-of-hadscs-into-rpe-cells-and-their-proliferation-and-migration
#20
Yi Zhang, Dandan Zhang, Wei Wei, Bingqiao Shen, Yuyao Wang, Yingjie Zhang, Yidan Zhang, Jing Ji, Hao Sun, Min Luo, Ping Gu
Age-related macular degeneration (AMD) is associated with the dysfunction and death of the retinal pigment epithelium (RPE). Recently, there has been increasing interest in stem cell-derived RPE cells for cell replacement therapies, such as those for AMD. The present study investigated whether RPE-conditioned medium (RPECM) could promote the differentiation of human adipose tissue-derived mesenchymal stromal cells (hADSCs) into RPE cells, and enhance the proliferation and migration of these cells. Reverse-transcription quantitative polymerase chain reaction analysis demonstrated that RPECM induced hADSCs to differentiate into cells expressing RPE markers, including retinoid isomerohydrolase (RPE65), cytokeratin (CK8) and Bestrophin, which were identified to be significantly upregulated by ~10-fold, 3...
October 2017: Experimental and Therapeutic Medicine
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