1
|
Viability of cultured human skin cells treated with 1,6-hexamethylene diisocyanate monomer and its oligomer isocyanurate in different culture media. Sci Rep 2021; 11:23804. [PMID: 34893638 PMCID: PMC8664849 DOI: 10.1038/s41598-021-02811-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/01/2021] [Accepted: 11/23/2021] [Indexed: 11/17/2022] Open
Abstract
The isocyanate monomer 1,6-hexamethylene diisocyanate (HDI) and one of its trimers, HDI isocyanurate, are airway and skin sensitizers contained in polyurethane paint. The toxic response of cultured skin cells to these compounds was measured by evaluating the isocyanate concentrations at which 50% of the cells die (i.e., lethal concentration 50%, LC50) because the relative toxicity of each form of HDI should be considered when exposure limits of HDI-based paints are set. By using a luminescent ATP-viability assay, we compared the cytotoxic effects of HDI monomer and HDI isocyanurate on cultured human skin cells (keratinocytes, fibroblasts, and melanocytes) after 4-h isocyanate exposures using culture media with varying levels of nutrients in order to also determine the effects of media composition on isocyanate toxicity. Before analysis, experimental wells were normalized to controls containing cells that were cultured with the same vehicle and media. The measured mean LC50 values ranged from 5 to 200 µM across the experimental conditions, in which HDI isocyanurate in protein-devoid media was the most toxic to cells, producing the lowest LC50 values. For HDI monomer, keratinocytes were the most resistant to its toxicity and melanocytes were the most susceptible. However, when exposed to HDI isocyanurate, the opposite was observed, with melanocytes being the most resilient and the keratinocytes and fibroblasts were more susceptible. Depending on the type of skin cells, dose–response data indicated that HDI isocyanurate was 2–6 times more toxic than HDI monomer when using protein-devoid media whereas HDI isocyanurate was 4–13 times more toxic than HDI monomer when protein-rich media was used. Therefore, if the protein-devoid saline medium alone were used for these experiments, then a significant under-estimation of their relative toxicities in protein-rich environments would have resulted. This difference is because HDI monomer toxicity was more attenuated by the presence of protein in the culture media than HDI isocyanurate toxicity. Thus, conclusions based on comparative toxicity studies and consequent inference applied to potential human toxicity can be affected by in vitro culture media conditions. The physiochemical difference in reactivity of the two forms of HDI to biological molecules most likely explains the observed toxicity differences and may have implications for skin penetration, adverse effects like skin sensitization, and systemic responses like asthma. Future studies are warranted to investigate differences in the biological availability, cellular toxicity, and immunologic sensitization mechanisms for HDI monomer and HDI isocyanurate.
Collapse
|
2
|
Silva A, Oliveira AS, Vaz CV, Correia S, Ferreira R, Breitenfeld L, Martinez-de-Oliveira J, Palmeira-de-Oliveira R, Pereira CMF, Palmeira-de-Oliveira A, Cruz MT. Anti-inflammatory potential of Portuguese thermal waters. Sci Rep 2020; 10:22313. [PMID: 33339881 PMCID: PMC7749128 DOI: 10.1038/s41598-020-79394-9] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/31/2020] [Accepted: 12/08/2020] [Indexed: 11/09/2022] Open
Abstract
In light of Medical Hydrology, thermal waters (TW) are all-natural mineral waters that emerge inside a thermal resort and have therapeutic applications. Their beneficial effect has been empirically recognized for centuries, being indicated for symptom alleviation and/or treatment of several diseases, almost all associated with inflammation. Indeed, an anti-inflammatory effect has been attributed to many different Portuguese TW but there is no scientific validation supporting this empiric knowledge. In the present study, we aimed to investigate the anti-inflammatory properties of 14 TW pertaining to thermal centers located in the Central Region of Portugal, and grouped according to their ionic profile. Mouse macrophage cells stimulated with lipopolysaccharide (LPS), a Toll-like receptor 4 agonist, were exposed to culture medium prepared in TW. Metabolism, nitric oxide (NO) production, inducible nitric oxide synthase (iNOS) expression levels and the scavenging capacity of TW, were investigated in vitro. 11 out of 14 TW reduced NO production and/or iNOS expression, and/or scavenging activity, in macrophages exposed to LPS. The sulphated/calcic TW did not show any effect on at least one of the inflammatory parameters evaluated. Two sulphurous/bicarbonate/sodic TW and the sulphurous/chlorinated/sodic TW promoted an increase in NO production and/or iNOS expression. Our results validate, for the first time, the anti-inflammatory properties of Portuguese TW, supporting their therapeutic use in the treatment of inflammation-related diseases and promoting their putative application in cosmetic products and medical devices.
Collapse
Affiliation(s)
- A Silva
- Faculty of Medicine, Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, Polo I, 1st Floor, 3004-504, Coimbra, Portugal. .,Faculty of Medicine, Center for Neuroscience and Cell Biology, University of Coimbra, Polo 3, IBILI 3rd Floor, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.
| | - A S Oliveira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal
| | - C V Vaz
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal
| | - S Correia
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal
| | - R Ferreira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal.,Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal
| | - L Breitenfeld
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal.,Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal
| | - J Martinez-de-Oliveira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal.,Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal
| | - R Palmeira-de-Oliveira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal.,Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal.,Labfit-Health Products Research and Development Lda, Ubimedical, Covilhã, Portugal
| | - C M F Pereira
- Centre for Innovative Biomedicine and Biotechnology (CIBB), University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal
| | - A Palmeira-de-Oliveira
- Health Sciences Research Centre (CICS-UBI), University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal.,Faculty of Health Sciences, University of Beira Interior, Av. Infante D. Henrique, 6200-506, Covilhã, Portugal.,Labfit-Health Products Research and Development Lda, Ubimedical, Covilhã, Portugal
| | - M T Cruz
- Faculty of Medicine, Center for Neuroscience and Cell Biology, University of Coimbra, Rua Larga, Polo I, 1st Floor, 3004-504, Coimbra, Portugal. .,Faculty of Pharmacy, University of Coimbra, Pólo das Ciências da Saúde, Azinhaga de Santa Comba, 3000-548, Coimbra, Portugal.
| |
Collapse
|
3
|
Ferreira I, Silva A, Martins JD, Neves BM, Cruz MT. Nature and kinetics of redox imbalance triggered by respiratory and skin chemical sensitizers on the human monocytic cell line THP-1. Redox Biol 2018; 16:75-86. [PMID: 29477863 PMCID: PMC5842329 DOI: 10.1016/j.redox.2018.02.002] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2017] [Revised: 01/30/2018] [Accepted: 02/04/2018] [Indexed: 11/16/2022] Open
Abstract
Low molecular weight reactive chemicals causing skin and respiratory allergies are known to activate dendritic cells (DC), an event considered to be a key step in both pathologies. Although generation of reactive oxygen species (ROS) is considered a major danger signal responsible for DC maturation, the mechanisms leading to cellular redox imbalance remain poorly understood. Therefore, the aim of this study was to unveil the origin and kinetics of redox imbalance elicited by 1-fluoro-2,4-dinitrobenzene (DNFB) and trimellitic anhydride chloride (TMAC), two golden standards of skin and chemical respiratory allergy, respectively. To track this goal, we addressed the time course modifications of ROS production and cellular antioxidant defenses as well as the modulation of MAPKs signaling pathways and transcription of pathophysiological relevant genes in THP-1 cells. Our data shows that the thiol-reactive sensitizer DNFB directly reacts with cytoplasmic glutathione (GSH) causing its rapid and marked depletion which results in a general increase in ROS accumulation. In turn, TMAC, which preferentially reacts with amine groups, induces a delayed GSH depletion as a consequence of increased mitochondrial ROS production. These divergences in ROS production seem to be correlated with the different extension of intracellular signaling pathways activation and, by consequence, with distinct transcription kinetics of genes such as HMOX1, IL8, IL1B and CD86. Ultimately, our observations may help explain the distinct DC phenotype and T-cell polarizing profile triggered by skin and respiratory sensitizers. Distinctive ROS origin and kinetics elicited by skin and respiratory sensitizers. ROS production elicited by DNFB results primarily from direct GSH haptenation. Distinct expression of genes involved in DC maturation and T-cell polarizing capacity.
Collapse
Affiliation(s)
- Isabel Ferreira
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, 3000- 548 Coimbra, Portugal.
| | - Ana Silva
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, 3000- 548 Coimbra, Portugal
| | - João Demétrio Martins
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, 3000- 548 Coimbra, Portugal
| | - Bruno Miguel Neves
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, 3000- 548 Coimbra, Portugal; Department of Medical Sciences and Institute of Biomedicine - iBiMED, University of Aveiro, 3810-193 Aveiro, Portugal
| | - Maria Teresa Cruz
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-504 Coimbra, Portugal; Faculty of Pharmacy, University of Coimbra, 3000- 548 Coimbra, Portugal.
| |
Collapse
|
4
|
Respiratory sensitization: toxicological point of view on the available assays. Arch Toxicol 2017; 92:803-822. [DOI: 10.1007/s00204-017-2088-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/08/2017] [Accepted: 10/05/2017] [Indexed: 12/22/2022]
|
5
|
Sullivan KM, Enoch SJ, Ezendam J, Sewald K, Roggen EL, Cochrane S. An Adverse Outcome Pathway for Sensitization of the Respiratory Tract by Low-Molecular-Weight Chemicals: Building Evidence to Support the Utility ofIn VitroandIn SilicoMethods in a Regulatory Context. ACTA ACUST UNITED AC 2017. [DOI: 10.1089/aivt.2017.0010] [Citation(s) in RCA: 32] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Affiliation(s)
- Kristie M. Sullivan
- Physicians Committee for Responsible Medicine, Washington, District of Columbia
| | - Steven J. Enoch
- School of Pharmacy and Biomolecular Sciences, Liverpool John Moores University, Liverpool, England
| | - Janine Ezendam
- National Institute for Public Health and the Environment (RIVM), Centre for Health Protection, Bilthoven, The Netherlands
| | - Katherina Sewald
- Fraunhofer Institute for Toxicology and Experimental Medicine ITEM, Hannover, Germany
| | - Erwin L. Roggen
- 3Rs Management & Consulting ApS (3RsMC ApS), Lyngby, Denmark
| | | |
Collapse
|
6
|
Zou Z, Zou R, Zong D, Shi Y, Chen J, Huang J, Zhu J, Chen L, Bao X, Liu Y, Liu W, Huang W, Hu J, Chen Z, Lao X, Chen C, Huang X, Lu Y, Ni X, Fang D, Wu D, Lu S, Jiang M, Qiu C, Wu Y, Qiu Q, Dong Y, Su Y, Zhao C, Zhong Z, Cai J, Liang Y. miR-495 sensitizes MDR cancer cells to the combination of doxorubicin and taxol by inhibiting MDR1 expression. J Cell Mol Med 2017; 21:1929-1943. [PMID: 28411377 PMCID: PMC5571520 DOI: 10.1111/jcmm.13114] [Citation(s) in RCA: 46] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2016] [Accepted: 01/04/2017] [Indexed: 12/18/2022] Open
Abstract
MDR1 is highly expressed in MDR A2780DX5 ovarian cancer cells, MDR SGC7901R gastric cancer cells and recurrent tumours. It pumps cytoplasmic agents out of cells, leading to decreased drug accumulation in cells and making cancer cells susceptible to multidrug resistance. Here, we identified that miR-495 was predicted to target ABCB1, which encodes protein MDR1. To reduce the drug efflux and reverse MDR in cancer cells, we overexpressed a miR-495 mimic in SGC7901R and A2780DX cells and in transplanted MDR ovarian tumours in vivo. The results indicated that the expression of MDR1 in the above cells or tumours was suppressed and that subsequently the drug accumulation in the MDR cells was decreased, cell death was increased, and tumour growth was inhibited after treatment with taxol-doxorubicin, demonstrating increased drug sensitivity. This study suggests that pre-treatment with miR-495 before chemotherapy could improve the curative effect on MDR1-based MDR cancer.
Collapse
MESH Headings
- ATP Binding Cassette Transporter, Subfamily B, Member 1/genetics
- ATP Binding Cassette Transporter, Subfamily B, Member 1/metabolism
- Animals
- Base Sequence
- Cell Line, Tumor
- Down-Regulation/drug effects
- Doxorubicin/pharmacology
- Drug Resistance, Multiple/drug effects
- Drug Resistance, Multiple/genetics
- Drug Resistance, Neoplasm/drug effects
- Drug Resistance, Neoplasm/genetics
- Gene Expression Regulation, Neoplastic/drug effects
- Humans
- Mice, Inbred BALB C
- MicroRNAs/genetics
- MicroRNAs/metabolism
- Paclitaxel/pharmacology
- RNA Interference
- Rifampin/pharmacology
Collapse
Affiliation(s)
- Zhenyou Zou
- Tumor InstituteTaizhou UniversityTaizhouZJChina
- Biochemistry Department of Purdue UniversityWest LafayetteINUSA
| | - Ruyi Zou
- Chemistry Department of Shangrao Normal UniversityShangraoJXChina
| | - Dan Zong
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Yonghong Shi
- Life science College of Nanjing Agricultural UniversityNanjingJSChina
| | - Jinyao Chen
- Radiology Department of Taizhou HospitalTaizhouZJChina
| | - Jie Huang
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Jiahui Zhu
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Liguan Chen
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Xiaoyan Bao
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Yuan Liu
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Weihao Liu
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | | | - Jingsang Hu
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Zhi Chen
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Xiaojie Lao
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | | | | | - Yao Lu
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Xueyin Ni
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | | | | | | | | | | | - Yuya Wu
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Qisha Qiu
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | | | - Yangyang Su
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | | | - Zhihe Zhong
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Jing Cai
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| | - Yong Liang
- Tumor InstituteTaizhou UniversityTaizhouZJChina
| |
Collapse
|
7
|
Guedes S, Neves B, Vitorino R, Domingues R, Cruz MT, Domingues P. Contact dermatitis: in pursuit of sensitizer's molecular targets through proteomics. Arch Toxicol 2016; 91:811-825. [PMID: 27129696 DOI: 10.1007/s00204-016-1714-y] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Accepted: 04/14/2016] [Indexed: 10/21/2022]
Abstract
Protein haptenation, i.e., the modification of proteins by small reactive chemicals, is the key step in the sensitization phase of allergic contact dermatitis (ACD). Despite the research effort in past decades, the identification of immunogenic hapten-protein complexes that trigger a relevant pathogenic immune response in ACD, as well as the haptenation reaction molecular site, and the elements of a potentially conditioning environment during each of these stages, remain poorly understood. These questions led us to employ a proteomics-based approach to identify modified proteins in the dendritic-like cell line THP-1 sensitized with fluorescein isothiocyanate (FITC), through a combination of 2D-gel electrophoresis, nano-LC and mass spectrometry. A specific set of 39 targeted proteins was identified and comprised proteins from various cellular locations and biological functions. One of FITC targets was identified as MLK, a member of the mixed-lineage kinase family known to act as a mitogen-activated protein kinase kinase kinase and to control the activity of specific mitogen-activated protein kinase pathways, namely p38 and JNK pathways. Haptenated in the vicinity of its active site, our results point to MLK being a relevant target due to a consistent non-activation at early time points of these pathways upon FITC sensitization in THP-1 cells. Moreover, FITC pre-treatment significantly decrease phospho-p38 and phospho-JNK levels induced upon exposure to a classical activator such as lipopolysaccharide or to the sensitizer 2,4-dinitrofluorobenzene. Overall, our data point to specific amino acid residues haptenation within critical proteins as the key step in the subsequent signaling pathways modulation responsible for DC activation and maturation events.
Collapse
Affiliation(s)
- Sofia Guedes
- Department of Chemistry, Mass Spectrometry Center, QOPNA, University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal.
| | - Bruno Neves
- Department of Chemistry, Mass Spectrometry Center, QOPNA, University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal.,Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Rui Vitorino
- Department of Medical Sciences, Institute for Biomedicine - iBiMED, University of Aveiro, Aveiro, Portugal.,Department of Physiology and Cardiothoracic Surgery, Faculty of Medicine, University of Porto, Porto, Portugal
| | - Rosário Domingues
- Department of Chemistry, Mass Spectrometry Center, QOPNA, University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal
| | - Maria Teresa Cruz
- Center for Neuroscience and Cell Biology, University of Coimbra, 3004-517, Coimbra, Portugal.,Faculty of Pharmacy, University of Coimbra, 3000-548, Coimbra, Portugal
| | - Pedro Domingues
- Department of Chemistry, Mass Spectrometry Center, QOPNA, University of Aveiro, Campus Universitario de Santiago, 3810-193, Aveiro, Portugal.
| |
Collapse
|
8
|
Martins JD, Maciel EA, Silva A, Ferreira I, Ricardo F, Domingues P, Neves BM, Domingues MRM, Cruz MT. Phospholipidomic Profile Variation on THP-1 Cells Exposed to Skin or Respiratory Sensitizers and Respiratory Irritant. J Cell Physiol 2016; 231:2639-51. [PMID: 26946329 DOI: 10.1002/jcp.25365] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/14/2015] [Accepted: 03/01/2016] [Indexed: 11/08/2022]
Abstract
Occupational exposure to low molecular weight reactive chemicals often leads to development of allergic reactions such as allergic contact dermatitis and respiratory allergies. Further insights into the interaction of these chemicals with physiopathological relevant cellular models might provide the foundations for novel non-animal approaches to safety assessment. In this work we used the human THP-1 cell line to determine phospholipidome changes induced by the skin sensitizer 1-fluoro-2,4-dinitrobenzene (DNFB), the respiratory allergen hexamethylene diisocyanate (HDI), and the irritant methyl salicylate (MESA). We detected that these chemicals differently induce lipid peroxidation and modulate THP-1 IL-1β, IL-12B, IL-8, CD86, and HMOX1 transcription. Decreased phosphatidylethanolamine content was detected in cells exposed to MESA, while profound alterations in the relative abundance of cardiolipin species were observed in cells exposed to DNFB. All chemicals tested induced a decrease in the relative abundance of plasmanyl phosphatidylcholine species PC (O-16:0e/18:1) and phosphatidylinositol species PI (34:1), while increasing PI (38:4). An increased abundance of oleic acid was observed in the phospholipids of cells exposed to DNFB while a decreased abundance of palmitic acid was detected in cells treated with MESA or DNFB. We conclude that both specific and common alterations at phospholipidome levels are triggered by the different chemicals, while not allowing a complete distinction between them using a Canonical Analysis of Principal Coordinates (CAP). The common effects observed at phospholipids level with all the chemicals tested might be related to unspecific cell cytotoxic mechanisms that nevertheless may contribute to the elicitation of specific immune responses. J. Cell. Physiol. 231: 2639-2651, 2016. © 2016 Wiley Periodicals, Inc.
Collapse
Affiliation(s)
- João D Martins
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.,Center for Neuroscience and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
| | - Elisabete A Maciel
- Department of Chemistry, Mass Spectrometry Centre, University of Aveiro, Aveiro, Portugal.,Departament of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Ana Silva
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
| | - Isabel Ferreira
- Center for Neuroscience and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
| | - Fernando Ricardo
- Departament of Biology and CESAM, University of Aveiro, Campus Universitário de Santiago, Aveiro, Portugal
| | - Pedro Domingues
- Department of Chemistry, Mass Spectrometry Centre, University of Aveiro, Aveiro, Portugal
| | - Bruno M Neves
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.,Center for Neuroscience and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal.,Department of Chemistry, Mass Spectrometry Centre, University of Aveiro, Aveiro, Portugal
| | | | - Maria Teresa Cruz
- Faculty of Pharmacy, University of Coimbra, Coimbra, Portugal.,Center for Neuroscience and Cell Biology (CNC), University of Coimbra, Coimbra, Portugal
| |
Collapse
|
9
|
Wisnewski AV, Liu J, Colangelo CM. Glutathione reaction products with a chemical allergen, methylene-diphenyl diisocyanate, stimulate alternative macrophage activation and eosinophilic airway inflammation. Chem Res Toxicol 2015; 28:729-37. [PMID: 25635619 DOI: 10.1021/tx5005002] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Abstract
Isocyanates have been a leading chemical cause of occupational asthma since their utility for generating polyurethane was first recognized over 60 years ago, yet the mechanisms of isocyanate asthma pathogenesis remain unclear. The present study provides in vivo evidence that a GSH mediated pathway underlies asthma-like eosinophilic inflammatory responses to respiratory tract isocyanate exposure. In naïve mice, a mixture of GSH reaction products with the chemical allergen, methylene-diphenyl diisocyanate (MDI), induced innate immune responses, characterized by significantly increased airway levels of Chitinase YM-1 and IL-12/IL-23β (but not α) subunit. However, in mice immunologically sensitized to MDI via prior skin exposure, identical GSH-MDI doses induced substantially greater inflammatory responses, including significantly increased airway eosinophil numbers and mucus production, along with IL-12/IL-23β, chitinases, and other indicators of alternative macrophage activation. The "self"-protein albumin in mouse airway fluid was uniquely modified by GSH-MDI at position (414)K, a preferred site of MDI reactivity on human albumin. The (414)K-MDI conjugation appears to covalently cross-link GSH to albumin via GSH's NH2-terminus, a unique conformation possibly resulting from cyclized mono(GSH)-MDI or asymmetric (S,N'-linked) bis(GSH)-MDI conjugates. Together, the data support a possible thiol mediated transcarbamoylating mechanism linking MDI exposure to pathogenic eosinophilic inflammatory responses.
Collapse
|