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retinoid investigation

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https://www.readbyqxmd.com/read/29169171/mirnas-are-unlikely-to-be-involved-in-retinoid-receptor-gene-regulation-in-pancreatic-cancer-cells
#1
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
#2
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
#3
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
#4
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
#5
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
#6
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
#7
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
#8
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
#9
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
#10
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
#11
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
#12
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
https://www.readbyqxmd.com/read/29034547/refractory-pityriasis-rubra-pilaris-treated-with-etanercept-adalimumab-or-ustekinumab-a-retrospective-investigation
#13
Nolan J Maloney, Lisa D Hisaw, Scott Worswick
Pityriasis rubra pilaris (PRP) is a rare, difficult to treat papulosquamous disorder that responds variably to retinoids and immunosuppression. Successful use of biologics for treating PRP has been described in the literature by case reports and a limited number of case series. To provide additional data, we retrospectively analyzed cases of PRP treated with biologics at our institution. We identified seven patients with a clear diagnosis of PRP treated with adalimumab, etanercept, and/or ustekinumab at our institution from January 1, 2014 to April 1, 2017...
October 15, 2017: Dermatologic Therapy
https://www.readbyqxmd.com/read/29033473/impact-of-atra-on-ovalbumin-and-mold-sensitized-f344-rats-and-reversal-of-health-related-implications-by-citral
#14
Ibrahim O Farah, Carlene Holt-Gray, Joseph A Cameron, Michelle Tucci, Hamed Benghuzzi
The role of retinoic acid (All Trans Retinoic Acid; ATRA) in the development of hypervitaminosis A pathophysiology is not well understood or established in the literature. As well, the role of Citral (inhibitor of retinoid function; a non-toxic chemical that exists in two forms (diethyl; C1 or cis-trans dimethyl; C2).) in the reversal of pathophysiological implications is also not ascertained under an in vivo setting. Therefore, it is hypothesized that ovalbumin exposure will sensitize the body to supra-physiologic levels of retinoic acid leading to a negative pathophysiological impact and that Citrals 1 and 2 will reverse or ameliorate the related damage to the body's pathophysiology...
March 2017: Biomedical Sciences Instrumentation
https://www.readbyqxmd.com/read/29033472/histopathological-analysis-of-the-f344-rat-lung-upon-exposure-to-retenoic-acid-ovalbumin-mold-spores-and-citral
#15
Ibrahim O Farah, Carlene Holt-Gray, Joseph A Cameron, Michelle Tucci, Hamed Benghuzzi
The paradoxical role of retinoic acid (All Trans Retinoic Acid; ATRA) in the development of allergic and/or inflammatory complications in contrast to a therapeutic modality for lung pathology is not well understood or established in the literature. As well, the role of Citral (inhibitor of retinoid function; a non-toxic chemical that exists in two forms (diethyl; C1 or cis-trans dimethyl; C2), in the reversal of retinoic acid, ovalbumin and allergic mold spore pathophysiology is also not well ascertained under an in vivo setting...
March 2017: Biomedical Sciences Instrumentation
https://www.readbyqxmd.com/read/29024079/the-preadolescent-acne-microbiome-a-prospective-randomized-pilot-study-investigating-characterization-and-effects-of-acne-therapy
#16
Carrie C Coughlin, Shane M Swink, Joseph Horwinski, Georgia Sfyroera, Julia Bugayev, Elizabeth A Grice, Albert C Yan
BACKGROUND/OBJECTIVES: Acne, a common pediatric disease, tends to be more comedonal in preadolescents, whereas older individuals are more likely to have inflammatory lesions in addition to comedones. Thus the microbiome of preadolescents may be different. In this pilot study we aimed to characterize the preadolescent acne microbiome, compare the microbiome in preadolescents with and without acne, and investigate changes in the microbiome after topical treatment with benzoyl peroxide or a retinoid in a small cohort of preadolescents...
October 11, 2017: Pediatric Dermatology
https://www.readbyqxmd.com/read/28985805/antigen-specificity-of-antiretinal-antibodies-in-patients-with-noninfectious-uveitis
#17
Ebrima Gibbs, Joanne Matsubara, Sijia Cao, Jing Cui, Farzin Forooghian
OBJECTIVE: Antiretinal antibodies (ARAs) have previously been described in noninfectious uveitis. However, the antigen specificity of these ARAs has not been investigated. The purpose of this study was to identify antigen-specific ARAs in noninfectious uveitis. METHODS: A total of 18 patients with noninfectious uveitis were enrolled. Surface plasmon resonance was used to measure binding responses of patient and control sera against several uveitogenic proteins: recoverin, S-antigen, interphotoreceptor retinoid binding (IRBP), retinal-pigment-epithelium-specific 65-kDa protein (RPE65), tyrosinase-related protein 1 (TRYP1), and tyrosinase-related protein 2 (TRYP2)...
October 2017: Canadian Journal of Ophthalmology. Journal Canadien D'ophtalmologie
https://www.readbyqxmd.com/read/28969887/crying-time-and-ror%C3%AE-foxp3-expression-in-lactobacillus-reuteri-dsm17938-treated-infants-with-colic-a-randomized-trial
#18
Francesco Savino, Maria Garro, Paola Montanari, Ilaria Galliano, Massimiliano Bergallo
OBJECTIVES: To evaluate crying time, retinoid-related orphan receptor-γ (RORγ) and forkhead box P3 (FOXP3) messenger RNA levels (transcription factors that can modulate T cell responses to gut microbes), and to investigate gut microbiota and fecal calprotectin in infants treated with Lactobacillus reuteri for infantile colic. STUDY DESIGN: A double-blind, placebo-controlled randomized trial was conducted in primary care in Torino from August 1, 2015 to September 30, 2016...
September 29, 2017: Journal of Pediatrics
https://www.readbyqxmd.com/read/28934090/adipogenic-effects-and-gene-expression-profiling-of-firemaster%C3%A2-550-components-in-human-primary-preadipocytes
#19
Emily W Y Tung, Vian Peshdary, Remi Gagné, Andrea Rowan-Carroll, Carole L Yauk, Adéle Boudreau, Ella Atlas
BACKGROUND: Exposure to flame retardants has been associated with negative health outcomes including metabolic effects. As polybrominated diphenyl ether flame retardants were pulled from commerce, human exposure to new flame retardants such as Firemaster® 550 (FM550) has increased. Although previous studies in murine systems have shown that FM550 and its main components increase adipogenesis, the effects of FM550 in human models have not been elucidated. OBJECTIVES: The objectives of this study were to determine if FM550 and its components are active in human preadipocytes, and to further investigate their mode of action...
September 14, 2017: Environmental Health Perspectives
https://www.readbyqxmd.com/read/28926927/grim-19-represses-the-proliferation-and-invasion-of-cutaneous-squamous-cell-carcinoma-cells-associated-with-downregulation-of-stat3-signaling
#20
Na Wu, Haiying Hui, Li Cui, Fan Yang
The gene associated with retinoid-interferon-induced mortality-19 (GRIM-19) has been identified as a tumor suppressor in many human cancers. However, little is known about the role of GRIM-19 in cutaneous squamous cell carcinoma (CSCC). Here, we aimed to investigate the potential function of GRIM-19 in CSCC and explore the underlying molecular mechanisms. We found that GRIM-19 protein and transcript levels were significantly decreased in CSCC cell lines. Overexpression of GRIM-19 suppressed the proliferation and invasion of CSCC cells, whereas knockdown of GRIM-19 promoted the proliferation and invasion of CSCC cells...
November 2017: Biomedicine & Pharmacotherapy, Biomédecine & Pharmacothérapie
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