1
|
Kakoti A, Borah J, Sonowal DJ, Devi S, Hazarika UN, Konwer S, Khakhlary P. Solution and gaseous phase sensing of formaldehyde with economical triphenylmethane based sensors: a tool to estimate formaldehyde content in stored fish samples. Analyst 2024; 149:2988-2995. [PMID: 38602359 DOI: 10.1039/d3an02038j] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 04/12/2024]
Abstract
The use of formalin to preserve raw food items such as fish, meat, vegetables etc. is very commonly practiced in the present day. Also, formaldehyde (FA), which is the main constituent of formalin solution, is known to cause serious health issues on exposure. Considering the ill effects of formaldehyde, herein we report synthesis of highly sensitive triphenylmethane based formaldehyde (FA) sensors from a single step reaction of inexpensive reagents namely 4-hydroxy benzaldehyde and 2,6-dimethyl phenol. The synthetic method also provides highly pure product in bulk quantity. The analytical activity of the triphenylmethane sensor 1 with a limit of detection (LOD) value of 2.31 × 10-6 M for FA was significantly enhanced through induced deprotonation and thereafter a LOD value of 1.82 × 10-8 M could be achieved. To the best of our knowledge, the LOD value of the deprotonated form (sensor 2) for FA was superior to those of all the FA optical sensors reported so far. The mechanism of sensing was demonstrated by 1H-NMR titration and recording mass spectra before and after addition of FA to a solution of sensor 2. Both sensor 1 and sensor 2 exhibit quenching in emission upon addition of FA. A fluorescence study also demonstrates enhancement in analytical activity of the sensor upon induced deprotonation. Then the sensor was effectively immobilized into a hydrophilic and biocompatible starch-PVA polymer matrix which enabled detection of FA in a 100% aqueous system reversibly. Again, quick and effective sensing of FA in real food samples (stored fish) with the help of a computational application was demonstrated. The sensors have significant practical applicability as they effectively detect FA in real food samples qualitatively and quantitatively.
Collapse
Affiliation(s)
- Arobinda Kakoti
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam, 786004, India.
| | - Jhorna Borah
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam, 786004, India.
| | | | - Shrutipriya Devi
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam, 786004, India.
| | | | - Surajit Konwer
- Department of Chemistry, Dibrugarh University, Dibrugarh, Assam, 786004, India.
| | | |
Collapse
|
2
|
Vanichkachorn G, Green-McKenzie J, Emmett E. Occupational Health Care. Fam Med 2022. [DOI: 10.1007/978-3-030-54441-6_52] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
|
3
|
Luminescence turn-on response of naphthalene diimide based chemosensor with Formaldehyde: A novel stratagem for estimation of formaldehyde in storage fish samples. Bioorg Med Chem Lett 2021; 49:128287. [PMID: 34311088 DOI: 10.1016/j.bmcl.2021.128287] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/23/2021] [Revised: 07/12/2021] [Accepted: 07/20/2021] [Indexed: 01/25/2023]
Abstract
A new strategy has been developed for selective estimation of toxic Formaldehyde (FA) in storage fish samples by a simple chemosensor (BNDI) based on naphthalene diimide core in aqueous medium at neutral pH. The rapid "lightning-up" fluorescence feature of BNDI has been implied to detect and estimate aqueous FA selectively at very low concentration. The chemosensing properties of BNDI with aqueous FA have been established through a unique interaction pattern which is proven by different spectroscopic and theoretical analysis.
Collapse
|
4
|
Sholapuri P, Chintha V, Matcha B, Pradeepkiran J. Beneficial effects of polyherbal formulation (Bronco-T) on formaldehyde-induced lung toxicity in male Wistar rats. Toxicol Res (Camb) 2021; 9:798-807. [PMID: 33447364 DOI: 10.1093/toxres/tfaa083] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 10/05/2020] [Accepted: 10/15/2020] [Indexed: 11/12/2022] Open
Abstract
Polyherbal compound (Bronco-T) has been extensively used as a traditional medicine for various therapies. However, very few report studies on anti-inflammatory and lung regeneration properties are evidenced. In the present study, we evaluated the beneficial actions and anti-inflammatory properties of polyherbal medicine, Bronco-T, exhibited by treating the lungs of rats exposed to formaldehyde to evaluate the beneficial properties. For this study, we divided into five groups': i.e. Group-I served as a control and the other four groups such as II, III, IV, and V are experimental. All animals maintained by regular feed and water ad libitum during the study. Formaldehyde vapors exposure at a single period of time (1 hour) daily (40%formaldehyde at room temperature) for 21 days period exposed all groups. The Bronco-T extracts about 50 mg/kg BW administered to experimental groups and group IV rats treated with 500μ grams/Kg BW salbutamol. To understand the impact of formaldehyde exposure on the beneficial effects of Bronco-T, we evaluated hematological parameters, bronchoalveolar lavage (BAL), histamine levels, and histological alterations of lung architecture. Formaldehyde-induced adverse effects in lung and increased histamine levels in BAL compared to Bronco-T-treated rats act as a preventive immunological role in blood toxicity and recovery of lung architecture in Bronco-T-treated rats. This study showed the evaluation of antihistamine levels through HPLC analysis. Bronco-T has antioxidant and anti-histamine properties as the widest therapeutic window, and we continue to evaluate the pharmacological evaluations needed in our further studies.
Collapse
Affiliation(s)
- Payani Sholapuri
- Department of Zoology, SVU College of Sciences, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India
| | - Venkataramaiah Chintha
- Department of Zoology, SVU College of Sciences, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India
| | - Bhaskar Matcha
- Department of Zoology, SVU College of Sciences, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India
| | - JangampalliAdi Pradeepkiran
- Department of Zoology, SVU College of Sciences, Sri Venkateswara University, Tirupati 517 502, Andhra Pradesh, India
| |
Collapse
|
5
|
Occupational Health Care. Fam Med 2020. [DOI: 10.1007/978-1-4939-0779-3_52-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
|
6
|
Yang X, He L, Xu K, Yang Y, Lin W. The development of an ICT-based formaldehyde-responsive fluorescence turn-on probe with a high signal-to-noise ratio. NEW J CHEM 2018. [DOI: 10.1039/c8nj02467g] [Citation(s) in RCA: 27] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
An ICT-based formaldehyde fluorescence turn-on probe (PBD-FA) with a high signal-to-noise ratio was judiciously constructed for bio-applications.
Collapse
Affiliation(s)
- Xueling Yang
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Materials Science and Engineering
- University of Jinan
- Jinan
| | - Longwei He
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Materials Science and Engineering
- University of Jinan
- Jinan
| | - Kaixin Xu
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Materials Science and Engineering
- University of Jinan
- Jinan
| | - Yunzhen Yang
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Materials Science and Engineering
- University of Jinan
- Jinan
| | - Weiying Lin
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Materials Science and Engineering
- University of Jinan
- Jinan
| |
Collapse
|
7
|
Murta GL, Campos KKD, Bandeira ACB, Diniz MF, Costa GDP, Costa DC, Talvani A, Lima WG, Bezerra FS. Oxidative effects on lung inflammatory response in rats exposed to different concentrations of formaldehyde. ENVIRONMENTAL POLLUTION (BARKING, ESSEX : 1987) 2016; 211:206-213. [PMID: 26774767 DOI: 10.1016/j.envpol.2015.12.054] [Citation(s) in RCA: 26] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/04/2015] [Revised: 12/22/2015] [Accepted: 12/23/2015] [Indexed: 06/05/2023]
Abstract
The formaldehyde (FA) is a crosslinking agent that reacts with cellular macromolecules such as proteins, nucleic acids and molecules with low molecular weight such as amino acids, and it has been linked to inflammatory processes and oxidative stress. This study aimed to analyze the oxidative effects on pulmonary inflammatory response in Fischer rats exposed to different concentrations of FA. Twenty-eight Fischer rats were divided into 4 groups (N = 7). The control group (CG) was exposed to ambient air and three groups were exposed to different concentrations of FA: 1% (FA1%), 5% (FA5%) and 10% (FA10%). In the Bronchoalveolar Lavage Fluid (BALF), the exposure to a concentration of 10% promoted the increase of inflammatory cells compared to CG. There was also an increase of macrophages and lymphocytes in FA10% and lymphocytes in FA5% compared to CG. The activity of NADPH oxidase in the blood had been higher in FA5% and FA10% compared to CG. The activity of superoxide dismutase enzyme (SOD) had an increase in FA5% and the activity of the catalase enzyme (CAT) showed an increase in FA1% compared to CG. As for the glutathione system, there was an increase in total glutathione (tGSH), reduced glutathione (GSH) and oxidized glutathione (GSSG) in FA5% compared to CG. The reduced/oxidized glutathione ratio (GSH/GSSG) had a decrease in FA5% compared to CG. There was an increase in lipid peroxidation compared to all groups and the protein carbonyl formation in FA10% compared to CG. We also observed an increase in CCL2 and CCL5 chemokines in the treatment groups compared to CG and in serum there was an increase in CCL2, CCL3 and CCL5 compared to CG. Our results point out to the potential of formaldehyde in promoting airway injury by increasing the inflammatory process as well as by the redox imbalance.
Collapse
Affiliation(s)
- Giselle Luciane Murta
- Laboratory of Experimental Pathophysiology (LAFEx), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil
| | - Keila Karine Duarte Campos
- Laboratory of Experimental Pathophysiology (LAFEx), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil
| | - Ana Carla Balthar Bandeira
- Laboratory of Metabolic Biochemistry (LBM), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil
| | - Mirla Fiuza Diniz
- Laboratory of Morphopathology (LMP), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil
| | - Guilherme de Paula Costa
- Laboratory of Immunobiology of Inflammation (LABIIN), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil
| | - Daniela Caldeira Costa
- Laboratory of Metabolic Biochemistry (LBM), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil
| | - André Talvani
- Laboratory of Immunobiology of Inflammation (LABIIN), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil
| | - Wanderson Geraldo Lima
- Laboratory of Morphopathology (LMP), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil
| | - Frank Silva Bezerra
- Laboratory of Experimental Pathophysiology (LAFEx), Department of Biological Sciences (DECBI), Center of Research in Biological Sciences(NUPEB), Federal University of OuroPreto (UFOP), Ouro Preto, MG, Brazil.
| |
Collapse
|
8
|
He L, Yang X, Ren M, Kong X, Liu Y, Lin W. An ultra-fast illuminating fluorescent probe for monitoring formaldehyde in living cells, shiitake mushrooms, and indoors. Chem Commun (Camb) 2016; 52:9582-5. [DOI: 10.1039/c6cc04254f] [Citation(s) in RCA: 77] [Impact Index Per Article: 9.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/05/2023]
Abstract
An ultra-fast illuminating fluorescent formaldehyde probe (R6-FA) was engineered for tracing formaldehyde in living cells, shiitake mushrooms and indoors.
Collapse
Affiliation(s)
- Longwei He
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Xueling Yang
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Mingguang Ren
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Xiuqi Kong
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Yong Liu
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| | - Weiying Lin
- Institute of Fluorescent Probes for Biological Imaging
- School of Chemistry and Chemical Engineering
- School of Biological Science and Technology
- University of Jinan
- Jinan
| |
Collapse
|
9
|
Latex sensitization and risk factors in female nurses in Thai governmental hospitals. Int J Occup Med Environ Health 2015; 27:93-103. [PMID: 24464443 DOI: 10.2478/s13382-014-0230-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
OBJECTIVES Exposure to latex allergens in latex gloves can cause occupational health problems in nurses, yet latex gloves are still widely used in Thai hospitals. Therefore, we conducted a study to determine the prevalence of latex sensitization in nurses and identify risk factors associated with sensitization. MATERIALS AND METHODS A questionnaire, providing information on personal characteristics, ill-health, working conditions and symptoms related to latex product use, was administered to 363 female nurses working in two tertiary hospitals in southern Thailand. Latex sensitization was confirmed using a solid phase immunoassay to detect anti-latex IgE antibodies. Total glove protein levels were determined by using a modified Lowry method and latex aeroallergens by a competitive inhibition immunoassay. RESULTS The overall prevalence of latex sensitization was 4.4%. Respiratory symptoms related to latex glove use were significantly associated with latex sensitization (OR = 5.5, 95% CI: 1.57-19). Total glove protein levels ranged 87.8-250.8 μg protein/dm(2). The prevalence of latex sensitization was higher (6.6% vs. 2.2%) in the hospital where gloves with higher protein levels (82-438 μg/g vs. 86-170 μg/g) were used. Furthermore, latex sensitization prevalence increased from 3% to 5% with increased average departmental aeroallergen concentrations. CONCLUSIONS Latex sensitization prevalence in Thai nurses was higher than previously reported. Respiratory exposure seems to play an important role, in addition to dermal exposure. If latex gloves cannot be replaced by non-latex alternatives, replacement with gloves with lower protein content should be considered.
Collapse
|
10
|
Maiellaro M, Correa-Costa M, Vitoretti LB, Gimenes Júnior JA, Câmara NOS, Tavares-de-Lima W, Farsky SHP, Lino-dos-Santos-Franco A. Exposure to low doses of formaldehyde during pregnancy suppresses the development of allergic lung inflammation in offspring. Toxicol Appl Pharmacol 2014; 278:266-74. [PMID: 24844129 DOI: 10.1016/j.taap.2014.05.003] [Citation(s) in RCA: 27] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2014] [Revised: 05/02/2014] [Accepted: 05/05/2014] [Indexed: 01/08/2023]
Abstract
Formaldehyde (FA) is an environmental and occupational pollutant, and its toxic effects on the immune system have been shown. Nevertheless, no data are available regarding the programming mechanisms after FA exposure and its repercussions for the immune systems of offspring. In this study, our objective was to investigate the effects of low-dose exposure of FA on pregnant rats and its repercussion for the development of allergic lung inflammation in offspring. Pregnant Wistar rats were assigned in 3 groups: P (rats exposed to FA (0.75 ppm, 1 h/day, 5 days/week, for 21 days)), C (rats exposed to vehicle of FA (distillated water)) and B (rats non-manipulated). After 30 days of age, the offspring was sensitised with ovalbumin (OVA)-alum and challenged with aerosolized OVA (1%, 15 min, 3 days). After 24 h the OVA challenge the parameters were evaluated. Our data showed that low-dose exposure to FA during pregnancy induced low birth weight and suppressed the development of allergic lung inflammation and tracheal hyperresponsiveness in offspring by mechanisms mediated by reduced anaphylactic antibodies synthesis, IL-6 and TNF-alpha secretion. Elevated levels of IL-10 were found. Any systemic alteration was detected in the exposed pregnant rats, although oxidative stress in the uterine environment was evident at the moment of the delivery based on elevated COX-1 expression and reduced cNOS and SOD-2 in the uterus. Therefore, we show the putative programming mechanisms induced by FA on the immune system for the first time and the mechanisms involved may be related to oxidative stress in the foetal microenvironment.
Collapse
Affiliation(s)
- Marília Maiellaro
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Matheus Correa-Costa
- Department of Immunology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Luana Beatriz Vitoretti
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | | | | | - Wothan Tavares-de-Lima
- Department of Pharmacology, Institute of Biomedical Sciences, University of São Paulo, São Paulo, Brazil
| | - Sandra Helena Poliselli Farsky
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil
| | - Adriana Lino-dos-Santos-Franco
- Department of Clinical and Toxicological Analyses, Faculty of Pharmaceutical Sciences, University of São Paulo, São Paulo, Brazil.
| |
Collapse
|
11
|
Prakash P, Singh V, Jain M, Rana M, Khanna V, Barthwal MK, Dikshit M. Silymarin ameliorates fructose induced insulin resistance syndrome by reducing de novo hepatic lipogenesis in the rat. Eur J Pharmacol 2014; 727:15-28. [DOI: 10.1016/j.ejphar.2014.01.038] [Citation(s) in RCA: 37] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/23/2013] [Revised: 01/14/2014] [Accepted: 01/22/2014] [Indexed: 02/07/2023]
|
12
|
Sanguanchaiyakrit N, Povey AC, de Vocht F. Personal exposure to inhalable dust and the specific latex aero-allergen, Hev b6.02, in latex glove manufacturing in Thailand. ACTA ACUST UNITED AC 2014; 58:542-50. [PMID: 24569810 DOI: 10.1093/annhyg/meu013] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/14/2022]
Abstract
OBJECTIVES Latex product manufacturing is an important industry in south-east Asia but has the potential for considerable occupational exposure of workers to latex allergens. Although exposure to latex allergens can result in adverse health reactions, few studies to characterize this exposure have been conducted to date. This study therefore aimed to characterize current airborne inhalable dust and the specific allergen, Hev b 6.02, exposures in this industry in Thailand. METHODS Workers were recruited from three factories in the southern part of Thailand. Full-shift inhalable dust personal air sampling was conducted using IOM sampling heads equipped with polytetrafluoroethylene filters at a 2.0 l min(-1) flowrate. After weighing to determine inhalable dust levels, filters were extracted and analysed for Hev b 6.02 using an enzyme immunometric assay. RESULTS Two hundred and seventy-five workers agreed to participate, resulting in a total of 292 measurements. Geometric mean (GM) personal exposure to inhalable dust was 0.88 mg m(-3), but individual exposures up to 12.34 mg m(-3) were measured. The pattern of exposure was similar across factories, with highest exposures in the stripping (GM 2.08-4.05 mg m(-3) for the 3 factories) and tumbling departments (1.11-2.17 mg m(-3)). Within-worker (day-to-day) variability contributed 92% to total variability. The Hev b 6.02 exposure pattern was similar with time-weighted average GM exposure levels in the oldest factory ranging from 8.7 mg m(-3) in the laboratory to 30.2mg m(-3) in the stripping department. In contrast to inhalable dust exposure, total exposure variability was primary driven by variability between workers (67%). CONCLUSIONS Workers in these latex product factories get routinely exposed to measurable Hev b 6.02 levels, which may give rise to increased incidence of allergic symptoms and occupational asthma. Also, in this measurement campaign a 10mg m(-3), but not 15 mg m(-3), occupational exposure limit for inhalable dust was occasionally exceeded. Highest Hev b 6.02 exposures were found in the stripping and tumbling departments, which would be natural targets for interventions aimed at reducing exposure.
Collapse
Affiliation(s)
- Nuthchyawach Sanguanchaiyakrit
- 1.Centre for Occupational and Environmental Health, Centre for Epidemiology, Institute of Population Health, University of Manchester, Manchester Academic Health Sciences Centre, Oxford Road, Manchester M13 9PL, UK 2.Occupational Safety and Health Standard Development Group, Occupational Safety and Health Bureau, Department of Labour protection and Welfare, Bangkok, Thailand
| | - Andrew C Povey
- 1.Centre for Occupational and Environmental Health, Centre for Epidemiology, Institute of Population Health, University of Manchester, Manchester Academic Health Sciences Centre, Oxford Road, Manchester M13 9PL, UK
| | - Frank de Vocht
- 1.Centre for Occupational and Environmental Health, Centre for Epidemiology, Institute of Population Health, University of Manchester, Manchester Academic Health Sciences Centre, Oxford Road, Manchester M13 9PL, UK
| |
Collapse
|
13
|
Formaldehyde inhalation reduces respiratory mechanics in a rat model with allergic lung inflammation by altering the nitric oxide/cyclooxygenase-derived products relationship. Food Chem Toxicol 2013; 59:731-8. [PMID: 23871789 DOI: 10.1016/j.fct.2013.07.027] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2013] [Revised: 05/20/2013] [Accepted: 07/11/2013] [Indexed: 11/23/2022]
Abstract
Bronchial hyperresponsiveness is a hallmark of asthma and many factors modulate bronchoconstriction episodes. A potential correlation of formaldehyde (FA) inhalation and asthma has been observed; however, the exact role of FA remains controversial. We investigated the effects of FA inhalation on Ovalbumin (OVA) sensitisation using a parameter of respiratory mechanics. The involvement of nitric oxide (NO) and cyclooxygenase-derived products were also evaluated. The rats were submitted, or not, to FA inhalation (1%, 90 min/day, 3 days) and were OVA-sensitised and challenged 14 days later. Our data showed that previous FA exposure in allergic rats reduced bronchial responsiveness, respiratory resistance (Rrs) and elastance (Ers) to methacholine. FA exposure in allergic rats also increased the iNOS gene expression and reduced COX-1. L-NAME treatment exacerbated the bronchial hyporesponsiveness and did not modify the Ers and Rrs, while Indomethacin partially reversed all of the parameters studied. The L-NAME and Indomethacin treatments reduced leukotriene B₄ levels while they increased thromboxane B₂ and prostaglandin E₂. In conclusion, FA exposure prior to OVA sensitisation reduces the respiratory mechanics and the interaction of NO and PGE₂ may be representing a compensatory mechanism in order to protect the lung from bronchoconstriction effects.
Collapse
|
14
|
|
15
|
Lino-dos-Santos-Franco A, Amemiya RM, Ligeiro de Oliveira AP, Breithaupt-Faloppa AC, Damazo AS, Oliveira-Filho RM, Tavares-de-Lima W. Differential effects of female sex hormones on cellular recruitment and tracheal reactivity after formaldehyde exposure. Toxicol Lett 2011; 205:327-35. [DOI: 10.1016/j.toxlet.2011.06.023] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/20/2011] [Revised: 06/16/2011] [Accepted: 06/17/2011] [Indexed: 10/18/2022]
|
16
|
Connective tissue mast cells are the target of formaldehyde to induce tracheal hyperresponsiveness in rats: Putative role of leukotriene B4 and nitric oxide. Toxicol Lett 2010; 192:85-90. [DOI: 10.1016/j.toxlet.2009.10.006] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/23/2009] [Revised: 10/05/2009] [Accepted: 10/06/2009] [Indexed: 11/17/2022]
|
17
|
Green-McKenzie J, Pak VM, Crawford GH. Thiuram allergy--a potential dermal allergy among health care workers. AAOHN JOURNAL : OFFICIAL JOURNAL OF THE AMERICAN ASSOCIATION OF OCCUPATIONAL HEALTH NURSES 2009; 57:139-141. [PMID: 19438079 DOI: 10.3928/08910162-20090401-08] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/27/2023]
Abstract
Occupational health nurses should be cognizant of the myriad exposures that can result in dermal reactions among health care workers.
Collapse
Affiliation(s)
- Judith Green-McKenzie
- Division of Occupational Medicine, Department of Emergency Medicine, University of Pennsylvania Medical Center, USA
| | | | | |
Collapse
|
18
|
Lino dos Santos Franco A, Damazo AS, Beraldo de Souza HR, Domingos HV, Oliveira-Filho RM, Oliani SM, Costa SKP, Tavares de Lima W. Pulmonary neutrophil recruitment and bronchial reactivity in formaldehyde-exposed rats are modulated by mast cells and differentially by neuropeptides and nitric oxide. Toxicol Appl Pharmacol 2006; 214:35-42. [PMID: 16427670 DOI: 10.1016/j.taap.2005.11.014] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/26/2005] [Revised: 11/25/2005] [Accepted: 11/28/2005] [Indexed: 10/25/2022]
Abstract
We have used a pharmacological approach to study the mechanisms underlying the rat lung injury and the airway reactivity changes induced by inhalation of formaldehyde (FA) (1% formalin solution, 90 min once a day, 4 days). The reactivity of isolated tracheae and intrapulmonary bronchi were assessed in dose-response curves to methacholine (MCh). Local and systemic inflammatory phenomena were evaluated in terms of leukocyte countings in bronchoalveolar lavage (BAL) fluid, blood, bone marrow lavage and spleen. Whereas the tracheal reactivity to MCh did not change, a significant bronchial hyporesponsiveness (BHR) was found after FA inhalation as compared with naive rats. Also, FA exposure significantly increased the total cell numbers in BAL, in peripheral blood and in the spleen, but did not modify the counts in bone marrow. Capsaicin hindered the increase of leukocyte number recovered in BAL fluid after FA exposure. Both compound 48/80 and indomethacin were able to prevent the lung neutrophil influx after FA, but indomethacin had no effect on that of mononuclear cells. Following FA inhalation, the treatment with sodium cromoglycate (SCG), but not with the nitric oxide (NO) synthase inhibitor L-NAME, significantly reduced the total cell number in BAL. Compound 48/80, L-NAME and SCG significantly prevented BHR to MCh after FA inhalation, whereas capsaicin was inactive in this regard. On the other hand, indomethacin exacerbated BHR. These data suggest that after FA inhalation, the resulting lung leukocyte influx and BHR may involve nitric oxide, airway sensory fibers and mast cell-derived mediators. The effect of NO seemed to be largely restricted to the bronchial tonus, whereas neuropeptides appeared to be linked to the inflammatory response, therefore indicating that the mechanisms responsible for the changes of airway responsiveness caused by FA may be separate from those underlying its inflammatory lung effects.
Collapse
|