Role of chemical composition and redox modification of poorly soluble nanomaterials on their ability to enhance allergic airway sensitisation in mice

Abstract Background Engineered nanoparticles (NPs) have been shown to enhance allergic airways disease in mice. However, the influence of the different physicochemical properties of these particles on their adjuvant properties is largely unknown. Here we investigate the effects of chemical composition and redox activity of poorly soluble NPs on their adjuvant potency in a mouse model of airway hypersensitivity. Results NPs of roughly similar sizes with different chemical composition and redox activity, including CeO2, Zr-doped CeO2, Co3O4, Fe-doped Co3O4(using Fe2O3 or Fe3O4) and TiO2 NPs, all showed adjuvant activity. OVA induced immune responses following intranasal exposure of BALB/c mice to 0.02% OVA in combination with 200 μg NPs during sensitization (on day 1, 3, 6 and 8) and 0.5% OVA only during challenge (day 22, 23 and 24) were more pronounced compared to the same OVA treatment regime without NPs. Changes in OVA-specific IgE and IgG1 plasma levels, differential cell count and cytokines in bronchoalveolar lavage fluid (BALF), and histopathological detection of mucosa cell metaplasia and eosinophil density in the conducting airways were observed. Adjuvant activity of the CeO2 NPs was primarily mediated via the Th2 response, while that of the Co3O4 NPs was characterised by no or less marked increases in IgE plasma levels, BALF IL-4 and IL-5 concentrations and percentages of eosinophils in BALF and more pronounced increases in BALF IL-6 concentrations and percentages of lymphocytes in BALF. Co-exposure to Co3O4 NPs with OVA and subsequent OVA challenge also induced perivascular and peribronchiolar lymphoid cell accumulation and formation of ectopic lymphoid tissue in lungs. Responses to OVA combined with various NPs were not affected by the amount of doping or redox activity of the NPs. Conclusions The findings indicate that chemical composition of NPs influences both the relative potency of NPs to exacerbate allergic airway sensitization and the type of immune response. However, no relation between the acellular redox activity and the observed adjuvant activity of the different NPs was found. Further research is needed to pinpoint the precise physiological properties of NPs and biological mechanisms determining adjuvant activity in order to facilitate a safe-by-design approach to NP development.

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Co-exposure to lipopolysaccharide and desert dust causes exacerbation of ovalbumin-induced allergic lung inflammation in mice via TLR4/MyD88-dependent and -independent pathways

Allergy Asthma & Clinical Immunology ◽

10.1186/s13223-019-0396-4 ◽

2019 ◽

Vol 15 (1) ◽

Author(s):

Yahao Ren ◽

Takamichi Ichinose ◽

Miao He ◽

Seiichi Youshida ◽

Masataka Nishikawa ◽

...

Keyword(s):

Airway Inflammation ◽

Immune Cell ◽

Adaptor Protein ◽

Lavage Fluid ◽

Specific Ige ◽

Pathological Changes ◽

Th2 Response ◽

Lung Eosinophilia ◽

High Concentrations

Abstract Background Lipopolysaccharide (LPS) often presents in high concentrations in particulate matter (PM), few studies have reported the enhancing effects of both LPS and PM on airway inflammation in mice and the role of toll-like receptors (TLRs) in this process. Asian sand dust (ASD) is observed most frequently during the spring. This study aimed to clarify the role of TLRs in murine lung eosinophilia exacerbated by ASD and LPS. Methods The effects of LPS and ASD co-treatment on ovalbumin (OVA)-induced lung eosinophilia were investigated using wild-type (WT), TLR2−/−, TLR4−/−, and adaptor protein myeloid differentiation factor 88 (MyD88)−/− BALB/c mice. ASD was heated (H-ASD) to remove the toxic organic substances. WT, TLR2−/−, TLR4−/− and MyD88−/− BALB/c mice were intratracheally instilled with four different combinations of LPS, H-ASD and OVA treatment. Subsequently, the pathological changes in lungs, immune cell profiles in bronchoalveolar lavage fluid (BALF), inflammatory cytokines/chemokines levels in BALF and OVA-specific immunoglobulin (Ig) in serum were analyzed. Results In WT mice, H-ASD + LPS exacerbated OVA-induced lung eosinophilia. This combination of treatments increased the proportion of eosinophils and the levels of IL-5, IL-13, eotaxin in BALF, as well as the production of OVA-specific IgE and IgG1 in serum compared to OVA treatment alone. Although these effects were stronger in TLR2−/− mice than in TLR4−/− mice, the expression levels of IL-5, IL-13, eotaxin were somewhat increased in TLR4−/− mice treated with OVA + H-ASD + LPS. In MyD88−/− mice, this pro-inflammatory mediator-induced airway inflammation was considerably weak and the pathological changes in lungs were negligible. Conclusions These results suggest that LPS and H-ASD activate OVA-induced Th2 response in mice, and exacerbate lung eosinophilia via TLR4/MyD88, TLR4/TRIF and other TLR4-independent pathways.

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Apigenin Attenuates Allergic Responses of Ovalbumin-Induced Allergic Rhinitis Through Modulation of Th1/Th2 Responses in Experimental Mice

Dose-Response ◽

10.1177/1559325820904799 ◽

2020 ◽

Vol 18 (1) ◽

pp. 155932582090479 ◽

Cited By ~ 1

Author(s):

Feng Chen ◽

Dongyun He ◽

Bailing Yan

Keyword(s):

Allergic Rhinitis ◽

Messenger Rna ◽

Immunoglobulin E ◽

Elevated Serum ◽

Lavage Fluid ◽

Specific Ige ◽

Cytokine Signaling ◽

Nuclear Factor ◽

Th2 Response ◽

Ifn Γ

Background: Allergic rhinitis (AR) is an immunoglobulin E (IgE)-mediated immune-inflammatory response mainly affecting nasal mucosa. Apigenin, a flavonoid, has been documented to possess promising anti-allergic potential. Aim: To determine the potential mechanism of action of apigenin against ovalbumin (OVA)-induced AR by assessing various behavioral, biochemical, molecular, and ultrastructural modifications. Materials and Methods: Allergic rhinitis was induced in BALB/c mice (18-22 grams) by sensitizing it with OVA (5%, 500 μL, intraperitoneal [IP] on each consecutive day, for 13 days) followed by intranasal challenge with OVA (5%, 5 μL per nostril on day 21). Animals were treated with either vehicle (distilled water, 10 mg/kg, IP) or apigenin (5, 10, and 20 mg/kg, IP). Results: Intranasal challenge of OVA resulted in significant induction ( P < .05) of AR reflected by an increase in nasal symptoms (sneezing, rubbing, and discharge), which were ameliorated significantly ( P < .05) by apigenin (10 and 20 mg/kg) treatment. It also significantly inhibited ( P < .05) OVA-induced elevated serum histamine, OVA-specific IgE, total IgE, and IgG1 and β-hexosaminidase levels. Ovalbumin-induced increased levels of interleukin (IL)-4, IL-5, IL-13, and interferon (IFN)-γ in nasal lavage fluid were significantly decreased ( P < .05) by apigenin. Ovalbumin-induced alterations in splenic GATA binding protein 3 (ie, erythroid transcription factor) (GATA3), T-box protein expressed in T cells (T-bet), signal transducer and activator of transcription-6 (STAT6), suppressor of cytokine signaling 1 (SOCS1), nuclear factor-kappa B (NF-κB), and nuclear factor of kappa light polypeptide gene enhancer in B-cells inhibitor-alpha messenger RNA, as well as protein expressions were significantly inhibited ( P < .05) by apigenin. It also significantly ameliorated ( P < .05) nasal and spleen histopathologic and ultrastructure aberration induced by OVA. Conclusion: Apigenin regulates Th1/Th2 balance via suppression in expressions of Th2 response (IgE, histamine, ILs, GATA3, STAT6, SOCS1, and NF-κB) and activation of Th1 response (IFN-γ and T-bet) to exert its anti-allergic potential in a murine model of OVA-induced AR.

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MicroRNA-29 mediates anti-inflammatory effects and alleviation of allergic responses and symptoms in mice with allergic rhinitis

Allergy Asthma & Clinical Immunology ◽

10.1186/s13223-021-00527-4 ◽

2021 ◽

Vol 17 (1) ◽

Author(s):

Jia Wang ◽

Jinshu Yin ◽

Hong Peng ◽

Aizhu Liu

Keyword(s):

Allergic Rhinitis ◽

Nasal Mucosa ◽

Immunoglobulin E ◽

Underlying Mechanism ◽

Lavage Fluid ◽

Specific Ige ◽

Ar Model ◽

Protein Levels ◽

Mucosa Cell

Abstract Background To investigate the role of microRNA-29 (miR-29) in mice with allergic rhinitis (AR) and its underlying mechanism. Methods AR model was established in BALB/c mice by intraperitoneal sensitization and intranasal challenge with ovalbumin (OVA). miRNA expression was examined in the nasal mucosa tissues of mice and patients with AR, and miRNA-29 was found to be downregulated. To unveil the role of miRNA-29 in AR, it was overexpressed in the nasal mucosa of AR mice by intranasal administration of miRNA-29 agomir. The symptoms of nasal rubbing and sneezing were recorded and evaluated. miR-29 expression, OVA-specific immunoglobulin E (IgE) concentration, pro-inflammatory cytokines levels, eosinophils number, and cleaved caspase-3 and CD276 expression were examined in nasal mucosa tissues and nasal lavage fluid (NALF) by qRT-PCR, ELISA, hematoxylin and eosin staining, western blotting, or immunohistochemistry, respectively. TUNEL assay was used to analyze nasal mucosa cells apoptosis. Results Decreased expression of miR-29 was observed in AR, the symptoms of which were alleviated by overexpressing miR-29. In addition, overexpression of miR-29 markedly reduced the concentration of OVA-specific IgE, the levels of IL-4, IL-6, IL-10, and IFN-γ, the pathological alterations and eosinophils infiltration in the nasal mucosa. Furthermore, restoration of miR-29 expression reduced nasal mucosa cell apoptosis. Moreover, overexpression of miR-29 significantly attenuated CD276 mRNA and protein levels in nasal mucosa cells. Conclusion MiR-29 mediated antiallergic effects in OVA-induced AR mice by decreasing inflammatory response, probably through targeting CD276. MiRNA-29 may serve as a potential novel therapeutic target for the treatment of AR.

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MicroRNA-182-5p relieves murine allergic rhinitis via TLR4/NF-κB pathway

Open Medicine ◽

10.1515/med-2020-0198 ◽

2020 ◽

Vol 15 (1) ◽

pp. 1202-1212

Author(s):

Aichun Zhang ◽

Yangzi Jin

Keyword(s):

Allergic Rhinitis ◽

Inflammatory Cells ◽

Lavage Fluid ◽

Specific Ige ◽

Inflammatory Factors ◽

Pcr Analysis ◽

Reverse Transcription Pcr ◽

Pathway Activation ◽

Nasal Lavage Fluid

AbstractAllergic rhinitis (AR) is one of the most common chronic diseases. This study examined whether microRNA (miR)-182-5p plays a role in AR by regulating toll-like receptor 4 (TLR4). First, data demonstrated that TLR4 was a target of miR-182-5p. Subsequently, AR mouse model was established to explore the role of miR-182-5p and TLR4 in AR in vivo. Initially, quantitative reverse transcription-PCR (qRT-PCR) analysis indicated that miR-182-5p was downregulated, while TLR4 expression was upregulated in AR mice. Then we found that miR-182-5p mimic reduced the frequency of sneezing and nose rubbing of the AR mice. In addition, miR-182-5p mimic significantly increased ovalbumin (OVA)-specific IgE and leukotriene C4 expression levels in nasal lavage fluid (NLF) and serum of AR mice. miR-182-5p mimic decreased the number of inflammatory cells in NLF of AR mice. It also reduced the levels of inflammatory factors in the serum of AR mice, such as interleukin (IL)-4, IL-5, IL-13, IL-17 and tumor necrosis factor (TNF)-α, while increasing the release of IFN-γ and IL-2. Finally, miR-182-5p mimic inhibited NF-κB signaling pathway activation in AR mice. However, all effects of miR-182-5p mimic on AR mice were reversed by TLR4-plasmid. In conclusion, miR-182-5p/TLR4 axis may represent a novel therapeutic target for AR.

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SERPINB10 contributes to asthma by inhibiting the apoptosis of allergenic Th2 cells

Respiratory Research ◽

10.1186/s12931-021-01757-1 ◽

2021 ◽

Vol 22 (1) ◽

Author(s):

Yuqing Mo ◽

Ling Ye ◽

Hui Cai ◽

Guiping Zhu ◽

Jian Wang ◽

...

Keyword(s):

T Cells ◽

Allergic Asthma ◽

Cd4 T Cells ◽

Quantitative Polymerase Chain Reaction ◽

Allergic Inflammation ◽

Specific Ige ◽

Th2 Cells ◽

Th1 Cells ◽

Th2 Response ◽

Th1 And Th2

Abstract Background Serine peptidase inhibitor, clade B, member 10 (SERPINB10) contributes to allergic inflammation in asthma. However, its role in the T-helper type 2 (Th2) response of allergic asthma is not known. The goal of this study was to unveil the function of SERPINB10 in the Th2 response of allergic asthma and the mechanism by which SERPINB10 affects the viability of Th2 cells. Methods Th2 cytokines and serum levels of house dust mite (HDM)-specific IgE in bronchoalveolar lavage fluid were examined by ELISA in an HDM-induced asthma model. The number and apoptosis of Th1 and Th2 cells in mouse lungs were measured by flow cytometry. Naïve CD4 T cells from patients with asthma were cultured under appropriate polarizing conditions to generate Th1 and Th2 cells. SERPINB10 expression in polarized Th1 and Th2 cells was quantified by real-time reverse transcription-quantitative polymerase chain reaction. SERPINB10 expression was knocked down in human CD4 T cells with lentivirus. Results Knockdown of SERPINB10 expression significantly diminished HDM-induced Th2 cytokine secretion and level of HDM-specific IgE. After HDM exposure, SERPINB10-knockdown mice had diminished numbers of Th2 cells, but similar numbers of Th1 cells, compared with those in negative-control mice. Th2 cells of SERPINB10-knockdown mice were more susceptible to apoptosis than that of control mice. Stimulating T-cell receptors (TCRs) with anti-CD3 antibody caused upregulation of SERPINB10 expression in polarized Th2 cells, but not polarized Th1 cells. Knockdown of SERPINB10 expression resulted in fewer numbers and greater apoptosis of polarized Th2 cells. Conclusion Our results suggest that SERPINB10 may contribute to allergic inflammation and the Th2 response of asthma by inhibiting the apoptosis of Th2 cells.

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Oral N-acetylcysteine protects against perfluoroisobutene toxicity in rats

Human & Experimental Toxicology ◽

10.1177/096032719701600410 ◽

1997 ◽

Vol 16 (4) ◽

pp. 212-216 ◽

Cited By ~ 13

Author(s):

Alison F Lailey

Keyword(s):

Oral Administration ◽

Pulmonary Oedema ◽

Plasma Levels ◽

Pyrolysis Product ◽

Lavage Fluid ◽

Lethal Effects ◽

Duration Of Protection ◽

Gas Exposure

1 Perfluoroisobutene, a pyrolysis product of polytetra fluoroethene may cause pulmonary oedema and death when inhaled. Oral N-acetylcysteine has shown protection against inhalation of perfluoroisobutene and in this study we have tried to elucidate the mechanism by which protection is mediated. 2 Protection against the lethal effects of inhaled per fluoroisobutene has been shown when N-acetylcys teine has been orally administered 4, 6 or 8 h before gas exposure. 3 Plasma levels of cysteine, glutathione and N-acetylcys teine were increased for up to 7 h following oral administration of Nac. 4 N-acetylcysteine was not detected in the bronchio alveolar lavage fluid following oral administration. 5 Duration of protection in vivo has been related to the duration of increased thiol levels in the plasma.

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Tidal midexpiratory flow as a measure of airway hyperresponsiveness in allergic mice

AJP Lung Cellular and Molecular Physiology ◽

10.1152/ajplung.2001.280.3.l565 ◽

2001 ◽

Vol 280 (3) ◽

pp. L565-L573 ◽

Cited By ~ 61

Author(s):

Thomas Glaab ◽

Angelika Daser ◽

Armin Braun ◽

Ulrich Neuhaus-Steinmetz ◽

Helmut Fabel ◽

...

Keyword(s):

Airway Hyperresponsiveness ◽

Bronchoalveolar Lavage Fluid ◽

Dynamic Compliance ◽

Lavage Fluid ◽

Specific Ige ◽

Significant Decline ◽

Interleukin 4 ◽

Body Plethysmography ◽

Interleukin 5 ◽

Baseline Values

A method for the noninvasive measurement of airway responsiveness was validated in allergic BALB/c mice. With head-out body plethysmography and the decrease in tidal midexpiratory flow (EF50) as an indicator of airway obstruction, responses to inhaled methacholine (MCh) and the allergen ovalbumin were measured in conscious mice. Allergen-sensitized and -challenged mice developed airway hyperresponsiveness as measured by EF50 to aerosolized MCh compared with that in control animals. This response was associated with increased allergen-specific IgE and IgG1 production, increased levels of interleukin-4 and interleukin-5 in bronchoalveolar lavage fluid and eosinophilic lung inflammation. Ovalbumin aerosol challenge elicited no acute bronchoconstriction but resulted in a significant decline in EF50 baseline values 24 h after challenge in allergic mice. The decline in EF50 to MCh challenge correlated closely with simultaneous decreases in pulmonary conductance and dynamic compliance. The decrease in EF50 was partly inhibited by pretreatment with the inhaled β2-agonist salbutamol. We conclude that measurement of EF50 to inhaled bronchoconstrictors by head-out body plethysmography is a valid measure of airway hyperresponsiveness in mice.

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Chemical composition and redox activity of PM0.25 near Los Angeles International Airport and comparisons to an urban traffic site

The Science of The Total Environment ◽

10.1016/j.scitotenv.2017.08.239 ◽

2018 ◽

Vol 610-611 ◽

pp. 1336-1346 ◽

Cited By ~ 11

Author(s):

Farimah Shirmohammadi ◽

Christopher Lovett ◽

Mohammad Hossein Sowlat ◽

Amirhosein Mousavi ◽

Vishal Verma ◽

...

Keyword(s):

Chemical Composition ◽

Los Angeles ◽

Urban Traffic ◽

Redox Activity ◽

International Airport ◽

Traffic Site

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Antibodies to Der p 1 and Der p 2 in allergic patients

Allergologia et Immunopathologia ◽

10.15586/aei.v49i2.59 ◽

2021 ◽

Vol 49 (2) ◽

pp. 46-52

Author(s):

Renata Harumi Cruz ◽

Leandro Hideki Ynoue ◽

Carolina Sanchez Aranda ◽

Dirceu Solé ◽

Antonio Condino Neto

Keyword(s):

Serum Levels ◽

Specific Ige ◽

Protective Mechanism ◽

Healthy Controls ◽

Healthy Individuals ◽

Serum Samples ◽

Th2 Response ◽

Iga Antibodies ◽

Der P 1 ◽

Der P 2

Introduction and objectives: Atopic individuals are characterized by increased IgE production and Th2 response if exposed to certain antigens. It is known that the mother transfers antimite antibodies to the fetus and newborn, IgG thru the placenta, and IgA thru breastfeeding, but it is not clear whether there is a protective mechanism mediated by them concerning the development of future allergies. This study aimed to compare the levels of IgA, IgG, and IgE antibodies specific to Der p 1 and Der p 2 between atopic and healthy individuals.Methods: Serum samples of 98 patients and 44 healthy controls were subjected to quantification for specific IgE, IgG, and IgA antibodies against Der p 1 and Der p 2 by ImmunoCap® and ELISA, and subjected to statistical analysis as indicated.Results: Atopic patients had higher serum levels of IgE, IgG, and IgA specific to Der p 1 and Der p 2. The correlation was more robust between IgE and IgG antibodies.Conclusions: Allergic patients produce higher levels of antibodies against Der p 1 and Der p 2 compared with healthy individuals. The mechanisms involved still require detailed studies.

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Allergic Inflammation Caused by Dimerized Translationally Controlled Tumor Protein is Attenuated by Cardamonin

Frontiers in Pharmacology ◽

10.3389/fphar.2021.765521 ◽

2021 ◽

Vol 12 ◽

Author(s):

Haejun Pyun ◽

Joo-Won Nam ◽

Hyunsoo Cho ◽

Jiyoung Park ◽

Eun Kyoung Seo ◽

...

Keyword(s):

Bronchoalveolar Lavage Fluid ◽

Allergic Inflammation ◽

Inflammatory Cells ◽

Allergic Diseases ◽

Lavage Fluid ◽

Specific Ige ◽

Translationally Controlled Tumor Protein ◽

Dimeric Form ◽

Allergic Mouse ◽

Inflammatory Effect

We demonstrated in our previous reports that dimeric form of translationally controlled tumor protein (dTCTP) initiates a variety of allergic phenomena. In the present study, we examined whether and how dTCTP’s role in allergic inflammation can be modulated or negated. The possible potential of cardamonin as an anti-allergic agent was assessed by ELISA using BEAS-2B cells and OVA-challenged allergic mouse model. The interaction between cardamonin and dTCTP was confirmed by SPR assay. Cardamonin was found to reduce the secretion of IL-8 caused by dTCTP in BEAS-2B cells by interacting with dTCTP. This interaction between dTCTP and cardamonin was confirmed through kinetic analysis (KD = 4.72 ± 0.07 μM). Also, cardamonin reduced the migration of various inflammatory cells in the bronchoalveolar lavage fluid (BALF), inhibited OVA specific IgE secretion and bronchial remodeling. In addition, cardamonin was observed to have an anti-allergic response by inhibiting the activity of NF-κB. Cardamonin exerts anti-allergic anti-inflammatory effect by inhibiting dTCTP, suggesting that it may be useful in the therapy of allergic diseases.

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