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Ball BK, Kuhn MK, Fleeman RM, Proctor EA, Brubaker DK. Differential responses of primary neuron-secreted MCP-1 and IL-9 to type 2 diabetes and Alzheimer's disease-associated metabolites. BIORXIV : THE PREPRINT SERVER FOR BIOLOGY 2023:2023.11.17.567595. [PMID: 38014333 PMCID: PMC10680853 DOI: 10.1101/2023.11.17.567595] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 11/29/2023]
Abstract
Type 2 diabetes (T2D) is implicated as a risk factor for Alzheimer's disease (AD), the most common form of dementia. In this work, we investigated neuroinflammatory responses of primary neurons to potentially circulating, blood-brain barrier (BBB) permeable metabolites associated with AD, T2D, or both. We identified nine metabolites associated with protective or detrimental properties of AD and T2D in literature (lauric acid, asparagine, fructose, arachidonic acid, aminoadipic acid, sorbitol, retinol, tryptophan, niacinamide) and stimulated primary mouse neuron cultures with each metabolite before quantifying cytokine secretion via Luminex. We employed unsupervised clustering, inferential statistics, and partial least squares discriminant analysis to identify relationships between cytokine concentration and disease-associations of metabolites. We identified MCP-1, a cytokine associated with monocyte recruitment, as differentially abundant between neurons stimulated by metabolites associated with protective and detrimental properties of AD and T2D. We also identified IL-9, a cytokine that promotes mast cell growth, to be differentially associated with T2D. Indeed, cytokines, such as MCP-1 and IL-9, released from neurons in response to BBB-permeable metabolites associated with T2D may contribute to AD development by downstream effects of neuroinflammation.
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Affiliation(s)
- Brendan K. Ball
- Weldon School of Biomedical Engineering, Purdue University, West Lafayette, IN, USA
| | - Madison K. Kuhn
- Department of Neurosurgery, Penn State College of Medicine, Hershey, PA, USA
- Department of Pharmacology, Penn State College of Medicine, Hershey, PA, USA
- Department of Biomedical Engineering, Penn State University, State College, PA, USA
- Center for Neural Engineering, Penn State University, State College, PA, USA
| | - Rebecca M. Fleeman
- Department of Neurosurgery, Penn State College of Medicine, Hershey, PA, USA
- Department of Pharmacology, Penn State College of Medicine, Hershey, PA, USA
| | - Elizabeth A. Proctor
- Department of Neurosurgery, Penn State College of Medicine, Hershey, PA, USA
- Department of Pharmacology, Penn State College of Medicine, Hershey, PA, USA
- Department of Biomedical Engineering, Penn State University, State College, PA, USA
- Center for Neural Engineering, Penn State University, State College, PA, USA
- Department of Engineering Science & Mechanics, Penn State University, State College, PA, USA
| | - Douglas K. Brubaker
- Center for Global Health & Diseases, Department of Pathology, School of Medicine, Case Western Reserve University School of Medicine, Cleveland, OH, USA
- Blood Heart Lung Immunology Research Center, University Hospitals, Cleveland, OH, USA
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Exploring the potential of antioxidants from fruits and vegetables and strategies for their recovery. INNOV FOOD SCI EMERG 2022. [DOI: 10.1016/j.ifset.2022.102974] [Citation(s) in RCA: 12] [Impact Index Per Article: 6.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/20/2022]
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Zhao H, Jin X. Causal associations between dietary antioxidant vitamin intake and lung cancer: A Mendelian randomization study. Front Nutr 2022; 9:965911. [PMID: 36118777 PMCID: PMC9479338 DOI: 10.3389/fnut.2022.965911] [Citation(s) in RCA: 11] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2022] [Accepted: 08/08/2022] [Indexed: 11/13/2022] Open
Abstract
Background Oxidative stress is currently considered to be closely related to the occurrence of respiratory tumors, especially lung cancer. Many observational studies have shown that increased antioxidant intake can reduce the risk of lung cancer, but the results are still controversial. Therefore, we performed a two-sample Mendelian randomized (MR) analysis to clarify the causal relationship between antioxidant vitamins and lung cancer. Methods To assess the causal effect of dietary antioxidant vitamin intake on lung cancer, we conducted a two-sample MR analysis and we extracted single-nucleotide polymorphisms (SNPs) that are associated with antioxidants from genome-wide association studies (GWASs) of the UK biobank. We gathered summary data for lung cancer from the International Lung Cancer Consortium (ILCCO), including 11,348 cases and 15,861 controls, and applied the inverse-variance weighted (IVW) method as the primary MR analysis, and performed a sensitivity analysis to verify the results. Results The results showed that higher dietary retinol intake was causally associated with lung cancer overall [odds ratio (OR) = 1.844, 95% CI, 1.359-2.502, p = 0.00009], squamous cell lung cancer (OR = 2.162, 95% CI, 1.117-4.183, p = 0.022), and lung adenocarcinoma (OR = 1.706, 95% CI, 1.084-2.685, p = 0.021). Additionally, carotene was positively correlated with lung adenocarcinoma (OR = 1.510, 95% CI, 1.002-2.276, p = 0.049). However, there was a non-significant relationship between the intake of other dietary antioxidants (vitamin C and vitamin E) and lung cancer. Conclusion Our research showed that dietary retinol intake has an adverse impact on lung cancer, and carotene might increase the risk of adenocarcinoma. This highlights the importance of revealing the underlying mechanisms of dietary antioxidant vitamins in lung cancer and delivers an important health message that dietary antioxidant vitamin intake may not be necessary for the prevention of lung cancer. It also provides a basis for future research.
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Affiliation(s)
- Hang Zhao
- Peking University China-Japan Friendship School of Clinical Medicine, Beijing, China.,Department of Urology, China-Japan Friendship Hospital, Beijing, China
| | - Xiaolin Jin
- Department of International Physical Examination Center, The First Affiliated Hospital of China Medical University, Shengyang, China
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Rosa-Silva HTD, Panzenhagen AC, Schmidtt V, Alves Teixeira A, Espitia-Pérez P, de Oliveira Franco Á, Mingori M, Torres-Ávila JF, Schnorr CE, Hermann PRS, Moraes DP, Almeida RF, Moreira JCF. Hepatic and neurobiological effects of foetal and breastfeeding and adulthood exposure to methylmercury in Wistar rats. CHEMOSPHERE 2020; 244:125400. [PMID: 31809933 DOI: 10.1016/j.chemosphere.2019.125400] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/21/2019] [Revised: 10/20/2019] [Accepted: 11/17/2019] [Indexed: 06/10/2023]
Abstract
Methylmercury (MeHg) is an organic bioaccumulated mercury derivative that strongly affects the environment and represents a public health problem primarily to riparian communities in South America. Our objective was to investigate the hepatic and neurological effects of MeHg exposure during the phases foetal and breast-feeding and adult in Wistar rats. Wistar rats (n = 10) were divided into 3 groups. Control group received mineral oil; The simple exposure (SE) group was exposed only in adulthood (0.5 mg/kg/day); and double exposure (DE) was pre-exposed to MeHg 0.5 mg/kg/day during pregnancy and breastfeeding (±40 days) and re-exposed to MeHg for 45 days from day 100. After, we evaluated possible abnormalities. Behavioral and biochemical parameters in liver and occipital cortex (CO), markers of liver injury, redox and AKT/GSK3β/mTOR signaling pathway. Our results showed that both groups treated with MeHg presented significant alterations, such as decreased locomotion and exploration and impaired visuospatial perception. The rats exposed to MeHg showed severe liver damage and increased hepatic glycogen concentration. The MeHg groups showed significant impairment in redox balance and oxidative damage to liver macromolecules and CO. MeHg upregulated the AKT/GSK3β/mTOR pathway and the phosphorylated form of the Tau protein. In addition, we found a reduction in NeuN and GFAP immunocontent. These results represent the first approach to the hepatotoxic and neural effects of foetal and adult MeHg exposure.
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Affiliation(s)
- Helen Tais da Rosa-Silva
- Centro de Estudos em Estresse Oxidativo, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil.
| | - Alana Castro Panzenhagen
- Centro de Estudos em Estresse Oxidativo, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Victória Schmidtt
- Centro de Estudos em Estresse Oxidativo, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Alexsander Alves Teixeira
- Centro de Estudos em Estresse Oxidativo, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Pedro Espitia-Pérez
- Facultad de Ciencias de la Salud, Laboratorio de Investigación Biomédica y Biología Molecular, Universidad del Sinú, Córdoba, Colombia
| | - Álvaro de Oliveira Franco
- Centro de Estudos em Estresse Oxidativo, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Moara Mingori
- Centro de Estudos em Estresse Oxidativo, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - José F Torres-Ávila
- Unit for Development and Innovation in Genetics and Molecular Biology, Universidad Simón Bolívar, Barranquilla, Atlántico, Colombia
| | - Carlos Eduardo Schnorr
- Departamento de Civil y Ambiental, Programa de Ingeniería Ambiental, Universidad de la Costa, Barranquilla, Atlántico, Colombia
| | - Paolla Rissi Silva Hermann
- Instituto de Química, Sala 103, Campus do Vale, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Diogo Pompéu Moraes
- Instituto de Química, Sala 103, Campus do Vale, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
| | - Roberto Farina Almeida
- Departamento de Ciências Biológicas, Instituto de Ciências Exatas e Biológicas, Universidade Federal de Ouro Preto, Ouro Preto, Minas Gerais, Brazil
| | - José Cláudio Fonseca Moreira
- Centro de Estudos em Estresse Oxidativo, Programa de Pós-Graduação em Ciências Biológicas: Bioquímica, Instituto de Ciências Básicas da Saúde, Universidade Federal do Rio Grande do Sul, Porto Alegre, Rio Grande do Sul, Brazil
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Girardi CS, Rostirolla DC, Lini FJM, Brum PO, Delgado J, Ribeiro CT, Teixeira AA, Peixoto DO, Heimfarth L, Kunzler A, Moreira JCF, Gelain DP. Nuclear RXRα and RXRβ receptors exert distinct and opposite effects on RA-mediated neuroblastoma differentiation. BIOCHIMICA ET BIOPHYSICA ACTA-MOLECULAR CELL RESEARCH 2018; 1866:317-328. [PMID: 30529222 DOI: 10.1016/j.bbamcr.2018.11.014] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/17/2018] [Revised: 11/12/2018] [Accepted: 11/30/2018] [Indexed: 12/30/2022]
Abstract
Retinoic acid (RA) promotes differentiation in multiple neurogenic cell types by promoting gene reprogramming through retinoid receptors and also by inducing cytosolic signaling events. The nuclear RXR receptors are one of the main mediators of RA cellular effects, classically by joining the direct receptors of RA, the nuclear RAR receptors, in RAR/RXR dimers which act as transcription factors. Distinct RXR genes lead to RXRα, RXRβ and RXRγ subtypes, but their specific roles in neuronal differentiation remain unclear. We firstly investigated both RXRs and RARs expression profiles during RA-mediated neuronal differentiation of human neuroblastoma cell line SH-SY5Y, and found varying levels of retinoid receptors transcript and protein contents along the process. In order to understand the roles of the expression of distinct RXR subtypes to RA signal transduction, we performed siRNA-mediated silencing of RXRα and RXRβ during the first stages of SH-SY5Y differentiation. Our results showed that RXRα is required for RA-induced neuronal differentiation of SH-SY5Y cells, since its silencing compromised cell cycle arrest and prevented the upregulation of neuronal markers and the adoption of neuronal morphology. Besides, silencing of RXRα affected the phosphorylation of ERK1/2. By contrast, silencing of RXRβ improved neurite extension and led to increased expression of tau and synaptophysin, suggesting that RXRβ may negatively regulate neuronal parameters related to neurite outgrowth and function. Our results indicate distinct functions for RXR subtypes during RA-dependent neuronal differentiation and reveal new perspectives for studying such receptors as clinical targets in therapies aiming at restoring neuronal function.
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Affiliation(s)
- Carolina Saibro Girardi
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil.
| | - Diana Carolina Rostirolla
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Fernanda Janini Mota Lini
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Pedro Ozorio Brum
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Jeferson Delgado
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Camila Tiefensee Ribeiro
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Alexsander Alves Teixeira
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Daniel Oppermann Peixoto
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Luana Heimfarth
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Alice Kunzler
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - José Cláudio Fonseca Moreira
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
| | - Daniel Pens Gelain
- Centro de Estudos em Estresse Oxidativo, Departamento de Bioquímica, Universidade Federal do Rio Grande do Sul (UFRGS), Rua Ramiro Barcelos, 2600 - Anexo, Porto Alegre, RS CEP 90035-003, Brazil
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Schröder HC, Tolba E, Diehl-Seifert B, Wang X, Müller WEG. Electrospinning of Bioactive Wound-Healing Nets. PROGRESS IN MOLECULAR AND SUBCELLULAR BIOLOGY 2017; 55:259-290. [PMID: 28238041 DOI: 10.1007/978-3-319-51284-6_8] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/06/2023]
Abstract
The availability of appropriate dressings for treatment of wounds, in particular chronic wounds, is a task that still awaits better solutions than provided by currently applied materials. The method of electrospinning enables the fabrication of novel materials for wound dressings due to the high surface area and porosity of the electrospun meshes and the possibility to include bioactive ingredients. Recent results show that the incorporation of biologically active inorganic polyphosphate microparticles and microspheres and synergistically acting retinoids into electrospun polymer fibers yields biocompatible and antibacterial mats for potential dressings with improved wound-healing properties. The underlying principles and the mechanism of these new approaches in the therapy wounds, in particular wounds showing impaired healing, as well as for further applications in skin regeneration/repair, are summarized.
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Affiliation(s)
- Heinz C Schröder
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany.
- NanotecMARIN GmbH, Duesbergweg 6, 55128, Mainz, Germany.
| | - Emad Tolba
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany
| | - Bärbel Diehl-Seifert
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany
- NanotecMARIN GmbH, Duesbergweg 6, 55128, Mainz, Germany
| | - Xiaohong Wang
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany
- NanotecMARIN GmbH, Duesbergweg 6, 55128, Mainz, Germany
| | - Werner E G Müller
- ERC Advanced Investigator Group, Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, 55128, Mainz, Germany.
- NanotecMARIN GmbH, Duesbergweg 6, 55128, Mainz, Germany.
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Changes in Cell Cycle and Up-Regulation of Neuronal Markers During SH-SY5Y Neurodifferentiation by Retinoic Acid are Mediated by Reactive Species Production and Oxidative Stress. Mol Neurobiol 2016; 54:6903-6916. [PMID: 27771902 DOI: 10.1007/s12035-016-0189-4] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2016] [Accepted: 09/30/2016] [Indexed: 12/17/2022]
Abstract
Human neuroblastoma SH-SY5Y cells have been used as an in vitro model for neurodegenerative disorders such as Parkinson's disease and can be induced to a mature neuronal phenotype through retinoic acid (RA) differentiation. However, mechanisms of RA-induced differentiation remain unclear. Here, we investigate the role of reactive species (RS) on SH-SY5Y neuroblastoma cells under RA differentiation, using the antioxidant Trolox® as co-treatment. We found that RA treatment for 7 days reduced the cell number and proliferative capacity and induced the expression of adult catecholaminergic/neuronal markers such as tyrosine hydroxylase (TH), β-III tubulin, and enolase-2. Evaluation of intracellular RS production by DCFH oxidation assay and quantification of cell non-enzymatic antioxidant activity by TRAP demonstrated that RA increases RS production. Furthermore, mitochondrial NADH oxidation showed to be inhibited under differentiation with RA. Cells subjected to co-treatment with antioxidant Trolox® demonstrated a remaining proliferative capacity and a decrease in the pro-oxidant state and RS production. Besides, antioxidant treatment restores the mitochondrial NADH oxidation. Importantly, Trolox® co-treatment inhibited the appearance of morphological characteristics such as neurite extension and branching, and decreased the expression of TH, β-III tubulin, and enolase-2 after a seven-day differentiation with RA, indicating that RS production is a necessary step in this process. Trolox® also inhibited the phosphorylation of Akt and ERK1/2, which are involved in differentiation and survival, respectively, of these cells. Altogether, these data indicate the presence of a redox-dependent mechanism in SH-SY5Y RA-differentiation process and can be a useful insight to improve understanding of neuronal differentiation signaling.
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Müller WE, Tolba E, Dorweiler B, Schröder HC, Diehl-Seifert B, Wang X. Electrospun bioactive mats enriched with Ca-polyphosphate/retinol nanospheres as potential wound dressing. Biochem Biophys Rep 2015; 3:150-160. [PMID: 29124179 PMCID: PMC5668879 DOI: 10.1016/j.bbrep.2015.08.007] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/10/2015] [Revised: 07/24/2015] [Accepted: 08/07/2015] [Indexed: 11/18/2022] Open
Abstract
Background While electrospun materials have been frequently used in tissue engineering no wound dressings exist that significantly improved wound healing effectively. Methods We succeeded to fabricate three-dimensional (3D) electrospun poly(D,l-lactide) (PLA) fiber mats into which nanospheres, formed from amorphous calcium polyphosphate (polyP) nanoparticles (NP) and encapsulated retinol (“retinol/aCa-polyP-NS” nanospheres [NS]), had been incorporated. Results Experiments with MC3T3-E1 cells revealed that co-incubation of the cells with Ca-polyP together with retinol (or incubation with retinol/aCa-polyP-NS) resulted in a significant synergistic effect on cell growth compared with particle-free polyP complexed with Ca2+ or amorphous Ca-polyP NPs and retinol alone. Incubation of the cells in the presence of the retinol/aCa-polyP NSs also caused a significant increase of the expression levels of the genes encoding for the fatty acid binding protein 4 (FABP4), as well as of the genes encoding for leptin and the leptin receptor. In contrast, the single components, soluble Na-polyP, complexed to Ca2+, or retinol-free aCa-polyP NPs, and retinol, had no significant effect on the expression of these genes. Conclusions These results indicate that the PLA fibers, supplemented with aCa-polyP-NP or retinol/aCa-polyP-NS, elicit morphogenetic activity, suggesting that these fiber mats, along with the antibacterial effect of polyP, have a beneficial potential as wound dressings combining antimicrobial and regenerative (wound healing) properties. General significance The PLA-based fiber mats, containing retinol and polyP nanoparticles, provide promising bioactive meshes that are urgently needed as dressings for chronic wounds. • Effect of PLA fiber mats with polyphosphate/retinol nanospheres on gene expression. • Increased expression of FABP4, leptin and leptin receptor in MC3T3-E1 cells. • Application as wound dressings, combining antimicrobial and regenerative properties.
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Affiliation(s)
- Werner E.G. Müller
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, d-55128 Mainz, Germany
- Corresponding authors. Fax: +49 6131 39 25243ERC Advanced Investigator Grant Research Group at Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University MainzDuesbergweg 6MainzD-55128Germany
| | - Emad Tolba
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, d-55128 Mainz, Germany
| | - Bernhard Dorweiler
- Division of Vascular Surgery, Department of Cardiothoracic and Vascular Surgery, University Medical Center of the Johannes Gutenberg University, Langenbeckstraße 1, d-55131 Mainz, Germany
| | - Heinz C. Schröder
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, d-55128 Mainz, Germany
| | | | - Xiaohong Wang
- ERC Advanced Investigator Grant Research Group at the Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University, Duesbergweg 6, d-55128 Mainz, Germany
- Corresponding authors. Fax: +49 6131 39 25243ERC Advanced Investigator Grant Research Group at Institute for Physiological Chemistry, University Medical Center of the Johannes Gutenberg University MainzDuesbergweg 6MainzD-55128Germany
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Schnorr CE, Bittencourt LDS, Petiz LL, Gelain DP, Zeidán-Chuliá F, Moreira JCF. Chronic retinyl palmitate supplementation to middle-aged Wistar rats disrupts the brain redox homeostasis and induces changes in emotional behavior. Mol Nutr Food Res 2015; 59:979-90. [DOI: 10.1002/mnfr.201400637] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/10/2014] [Revised: 01/29/2015] [Accepted: 01/30/2015] [Indexed: 01/02/2023]
Affiliation(s)
- Carlos Eduardo Schnorr
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Leonardo da Silva Bittencourt
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Lyvia Lintzmaier Petiz
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Daniel Pens Gelain
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - Fares Zeidán-Chuliá
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
| | - José Cláudio Fonseca Moreira
- Centro de Estudos de Estresse Oxidativo; Departamento de Bioquímica; Instituto de Ciências Básicas da Saúde; Universidade Federal do Rio Grande do Sul; Porto Alegre RS Brazil
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Vitamin A (retinol) downregulates the receptor for advanced glycation endproducts (RAGE) by oxidant-dependent activation of p38 MAPK and NF-kB in human lung cancer A549 cells. Cell Signal 2013; 25:939-54. [PMID: 23333461 DOI: 10.1016/j.cellsig.2013.01.013] [Citation(s) in RCA: 39] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2012] [Accepted: 01/10/2013] [Indexed: 12/24/2022]
Abstract
As an essential component of the diet, retinol supplementation is often considered harmless and its application is poorly controlled. However, recent works demonstrated that retinol may induce a wide array of deleterious effects, especially when doses used are elevated. Controlled clinical trials have demonstrated that retinol supplementation increased the incidence of lung cancer and mortality in smokers. Experimental works in cell cultures and animal models showed that retinol may induce free radical production, oxidative stress and extensive biomolecular damage. Here, we evaluated the effect of retinol on the regulation of the receptor for advanced glycation end-products (RAGE) in the human lung cancer cell line A549. RAGE is constitutively expressed in lungs and was observed to be down-regulated in lung cancer patients. A549 cells were treated with retinol doses reported as physiologic (2 μM) or therapeutic (5, 10 or 20 μM). Retinol at 10 and 20 μM increased free radical production, oxidative damage and antioxidant enzyme activity in A549 cells. These doses also downregulated RAGE expression. Antioxidant co-treatment with Trolox®, a hydrophilic analog of α-tocopherol, reversed the effects of retinol on oxidative parameters and RAGE downregulation. The effect of retinol on RAGE was mediated by p38 MAPK activation, as blockade of p38 with PD169316 (10 μM), SB203580 (10 μM) or siRNA to either p38α (MAPK14) or p38β (MAPK11) reversed the effect of retinol on RAGE. Trolox also inhibited p38 phosphorylation, indicating that retinol induced a redox-dependent activation of this MAPK. Besides, we observed that NF-kB acted as a downstream effector of p38 in RAGE downregulation by retinol, as NF-kB inhibition by SN50 (100 μg/mL) and siRNA to p65 blocked the effect of retinol on RAGE, and p38 inhibitors reversed NF-kB activation. Taken together, our results indicate a pro-oxidant effect of retinol on A549 cells, and suggest that modulation of RAGE expression by retinol is mediated by the redox-dependent activation of p38/NF-kB signaling pathway.
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