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Carvalho N, Barreira AL, Henriques S, Ferreira M, Cardoso C, Luz C, Costa PM. Compilation of Evidence Supporting the Role of a T Helper 2 Reaction in the Pathogenesis of Acute Appendicitis. Int J Mol Sci 2024; 25:4216. [PMID: 38673802 PMCID: PMC11050072 DOI: 10.3390/ijms25084216] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2024] [Revised: 03/27/2024] [Accepted: 03/31/2024] [Indexed: 04/28/2024] Open
Abstract
Despite being the most common abdominal surgical emergency, the cause of acute appendicitis (AA) remains unclear, since in recent decades little progress has been made regarding its etiology. Obstruction of the appendicular lumen has been traditionally presented as the initial event of AA; however, this is often the exception rather than the rule, as experimental data suggest that obstruction is not an important causal factor in AA, despite possibly occurring as a consequence of the inflammatory process. Type I hypersensitivity reaction has been extensively studied, involving Th2 lymphocytes, and cytokines such as IL-4, IL-5, IL-9 and IL-13, which have well-defined functions, such as a positive-feedback effect on Th0 for differentiating into Th2 cells, recruitment of eosinophils and the release of eosinophilic proteins and the production of IgE with the activation of mast cells, with the release of proteins from their granules. Cytotoxic activity and tissue damage will be responsible for the clinical manifestation of the allergy. AA histological features are similar to those found in allergic reactions like asthma. The intestine has all the components for an allergic immune response. It has contact with hundreds of antigens daily, most of them harmless, but some can potentially induce an allergic response. In recent years, researchers have been trying to assess if allergy is a component of AA, with their latest advances in the understanding of AA as a Th2 reaction shown by the authors of this article.
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Affiliation(s)
- Nuno Carvalho
- Serviço Cirurgia Geral, Hospital Garcia de Orta, 2805-267 Almada, Portugal; (A.L.B.); (S.H.); (M.F.); (C.L.); (P.M.C.)
- Faculdade Medicina, Universidade Lisboa, 1649-028 Lisboa, Portugal
| | - Ana Lúcia Barreira
- Serviço Cirurgia Geral, Hospital Garcia de Orta, 2805-267 Almada, Portugal; (A.L.B.); (S.H.); (M.F.); (C.L.); (P.M.C.)
| | - Susana Henriques
- Serviço Cirurgia Geral, Hospital Garcia de Orta, 2805-267 Almada, Portugal; (A.L.B.); (S.H.); (M.F.); (C.L.); (P.M.C.)
| | - Margarida Ferreira
- Serviço Cirurgia Geral, Hospital Garcia de Orta, 2805-267 Almada, Portugal; (A.L.B.); (S.H.); (M.F.); (C.L.); (P.M.C.)
- Faculdade Medicina, Universidade Lisboa, 1649-028 Lisboa, Portugal
| | - Carlos Cardoso
- Dr. Joaquim Chaves, Laboratório de Análises Clínicas, 1495-068 Algés, Portugal;
| | - Carlos Luz
- Serviço Cirurgia Geral, Hospital Garcia de Orta, 2805-267 Almada, Portugal; (A.L.B.); (S.H.); (M.F.); (C.L.); (P.M.C.)
- Faculdade Medicina, Universidade Lisboa, 1649-028 Lisboa, Portugal
| | - Paulo Matos Costa
- Serviço Cirurgia Geral, Hospital Garcia de Orta, 2805-267 Almada, Portugal; (A.L.B.); (S.H.); (M.F.); (C.L.); (P.M.C.)
- Faculdade Medicina, Universidade Lisboa, 1649-028 Lisboa, Portugal
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Zhang FZ, Tan M, Zeng J, Qi XW, Zhang YT, Che YT, Zhang S, Li BJ. A Supramolecular Assembly of EGCG for Long-Term Treatment of Allergic Rhinitis. ACS Biomater Sci Eng 2024; 10:2282-2298. [PMID: 38526450 DOI: 10.1021/acsbiomaterials.4c00091] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/26/2024]
Abstract
Allergic rhinitis (AR) is a type-I hypersensitivity disease mediated by immunoglobulin E (IgE). Although antihistamines, glucocorticoids, leukotriene receptor antagonists, and other drugs are widely used to treat AR, the various adverse side effects of long-term use of these drugs should not be ignored. Therefore, more effective and safe natural alternative strategies are urgently needed. To this end, this study designed a nanosupramolecular delivery system composed of β-cyclodextrin supramolecular polymer (PCD), thiolated chitosan (TCS), and natural polyphenol epigallocatechin gallate (EGCG) for intranasal topical continuous treatment of AR. The TCS/PCD@EGCG nanocarriers exhibited an excellent performance in terms of retention and permeability in the nasal mucosa and released the vast majority of EGCG responsively in the nasal microenvironment, thus resulting in the significantly high antibacterial and antioxidant capacities. According to the in vitro model, compared with free EGCG, TCS/PCD@EGCG inhibited mast cell activity and abnormal histamine secretion in a more long-term and sustained manner. According to the in vivo model, whether in the presence of continuous or intermittent administration, TCS/PCD@EGCG substantially inhibited the secretion of allergenic factors and inflammatory factors, mitigated the pathological changes of nasal mucosa, alleviated the symptoms of rhinitis in mice, and produced a satisfactory therapeutic effect on AR. In particular, the therapeutic effect of TCS/PCD@EGCG systems were even superior to that of budesonide during intermittent treatment. Therefore, the TCS/PCD@EGCG nanocarrier is a potential long-lasting antiallergic medicine for the treatment of AR.
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Affiliation(s)
- Fu Zhong Zhang
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Min Tan
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Jing Zeng
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Xu-Wei Qi
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Ye-Tao Zhang
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Yu-Ting Che
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
| | - Sheng Zhang
- State Key Laboratory of Polymer Materials Engineering, Polymer Research Institute of Sichuan University, Sichuan University, Chengdu 610065, China
| | - Bang-Jing Li
- Key Laboratory of Mountain Ecological Restoration and Bioresource Utilization, Chengdu Institute of Biology, Chinese Academy of Sciences, Chengdu 610041, China
- University of Chinese Academy of Sciences, Beijing 100049, China
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Wang C, Zhuo JJ, Li WQ, Zhou ML, Cheng KJ. Role of autophagy and mitophagy of group 2 innate lymphoid cells in allergic and local allergic rhinitis. World Allergy Organ J 2024; 17:100852. [PMID: 38298830 PMCID: PMC10827603 DOI: 10.1016/j.waojou.2023.100852] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/04/2023] [Revised: 11/14/2023] [Accepted: 12/07/2023] [Indexed: 02/02/2024] Open
Abstract
Background Roles of ILC2s in allergic rhinitis (AR) and local allergic rhinitis (LAR) are unclear. In this study, we are determined to find the levels of autophagy and mitophagy of ILC2s in allergic nasal inflammation. Methods ELISA was used to detect type 2 inflammatory cytokines. Hematoxylin and eosin (H&E) staining were used to compare the eosinophil (EOS) infiltration of nasal tissue specimens. Flow cytometry was used to detect the levels of ILC2s and Th2 cells. Immunohistochemistry (IHC) and Western blot (WB) were used to detect the levels of Beclin1, LC3, p62, PINK1, Parkin, FUNDC1, and BNIP3 in nasal mucosa. The levels of autophagy related proteins and mitophagy related proteins of the ILC2s were detected by WB. The number of autophagosomes of ILC2s was observed by transmission electron microscopy. The co-localization levels of GFP-LC3 and Mito tracker in ILC2s were observed by confocal microscopy using immunofluorescence. Results We found that the level of type 2 inflammation in AR and LAR mice was significantly increased. The levels of autophagy and mitophagy of AR and LAR mice in nasal mucosa and ILC2s were both increased. Conclusions ILC2s may be associated with the occurrence and development of nasal allergic inflammation. The abnormal increase of autophagy and mitophagy levels in the nose may be associated with the incidence of AR and LAR. Abnormal autophagy and mitophagy levels of ILC2s cells may be one of the causes of allergic nasal inflammation.
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Affiliation(s)
- Chen Wang
- Department of Otolaryngology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Jin-Jing Zhuo
- Department of Otolaryngology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Wen-Qian Li
- Department of Otolaryngology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Min-Li Zhou
- Department of Otolaryngology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
| | - Ke-Jia Cheng
- Department of Otolaryngology, The First Affiliated Hospital, School of Medicine, Zhejiang University, Hangzhou, China
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Guthikonda MR, Manimala D, Aryasomayajula S, Gude A, Singhal M. Nasal and Serum Immunoglobulin E Levels in Symptomatic Allergic Rhinitis Patients: A Case-Control Study. Indian J Otolaryngol Head Neck Surg 2024; 76:503-507. [PMID: 38440571 PMCID: PMC10908889 DOI: 10.1007/s12070-023-04196-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/23/2023] [Accepted: 08/24/2023] [Indexed: 03/06/2024] Open
Abstract
Allergic Rhinitis (AR) is an inflammatory condition of the nasal mucosa triggered by Immunoglobulin E (IgE) mediated response to exposure to allergens. The most common symptoms are nasal obstruction, sneezing, runny nose and these in addition to swollen, itchy, red and watery eyes. Recent studies have shown highly elevated immunoglobulin E levels in the airway mucosa independently of serum IgE levels and atopic status. Nasal mucosa has intrinsic capability to produce IgE in allergic rhinitis. The study was conducted to explore the levels of nasal total IgE and serum total IgE and their correlation in symptomatic AR patients. This was a case control-study and two groups participated in the study. The first group included 203 symptomatic patients who were diagnosed in the otorhinolaryngology clinic as cases of AR, known as AR group. The second group was control group and included 203 apparently healthy volunteers without any history suggestive of AR. The associated risk factors for severe allergic symptoms were assessed by logistic regression model. The mean differences between nasal total IgE and serum total IgE levels of both groups were compared by t-test. A correlation was investigated between nasal IgE and serum IgE in both the groups. The mean level of nasal total IgE and serum total IgE was found to be 103.9 and 291.4 IU/ml in AR group, respectively, and 17.5 and 67.5 IU/ml in the control group, respectively. Levels of nasal total IgE and serum total IgE were significantly higher in the nasal fluids and serum of symptomatic allergic rhinitis patients than in controls (p < 0.001 and < 0.001 respectively). A logistic regression model showed severity of allergic rhinitis was significantly associated with nasal total IgE levels. The correlation of nasal total IgE levels with serum total IgE levels in the control group was found to be statistically insignificant. However a statistically positive correlation was observed between nasal total IgE and serum total IgE levels in the AR group. It is possible that nasal IgE and serum IgE interact in the pathogenesis of AR and this is evident in the current study. Nasal IgE levels should be evaluated in severe symptomatic allergic rhinitis patients. The interaction between nasal IgE to serum IgE levels should be further investigated in AR patients for other possible prevalent endotypes of AR.
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Affiliation(s)
| | - Danda Manimala
- Department of Pathology, Gayatri Institute of Health Care & Medical Technology, GVP Medical College, Maridi Valley, Marikavalasa, Visakhapatnam, Andhra Pradesh 530048 India
| | - Sirish Aryasomayajula
- Department of Pathology, Gayatri Institute of Health Care & Medical Technology, GVP Medical College, Maridi Valley, Marikavalasa, Visakhapatnam, Andhra Pradesh 530048 India
| | - Aswini Gude
- Department of Pathology, Gayatri Institute of Health Care & Medical Technology, GVP Medical College, Maridi Valley, Marikavalasa, Visakhapatnam, Andhra Pradesh 530048 India
| | - Megha Singhal
- INHS Kalyani, Gandhigram, Visakhapatnam, Andhra Pradesh 530005 India
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Bliss A, Sheehan C, Erwin E, Jatana K, Elmaraghy CA. Local Allergen-Specific IgE Production in Turbinate Tissue of Pediatric Patients. Ann Otol Rhinol Laryngol 2023; 132:1216-1221. [PMID: 36541625 DOI: 10.1177/00034894221141769] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/23/2023]
Abstract
OBJECTIVES The objective of this study is to compare serum allergen-specific IgE to IgE levels in nasal tissue taken from the inferior turbinates of pediatric patients undergoing turbinate reduction. METHODS Twenty-six pediatric patients were recruited at the time of turbinate reduction surgery. At the time of recruitment, parents of patients completed the validated 22 item Sinonasal Outcome Test (SNOT-22) to describe symptoms prior to surgery. A sample of turbinate tissue was taken during turbinate reduction and blood was collected. Tissue and serum IgE were measured and differences in the group characteristics were evaluated using Chi-square tests for binary variables and Wilcoxon-Mann-Whitney tests for continuous variables. Student's t test was used to assess differences in means of total SNOT-22 scoring between the groups, and Wilcoxon-Mann-Whitney tests were used again for the rest of the SNOT-22 analysis. RESULTS Levels of IgE in the serum were compared to levels in the turbinate tissue from all patients for each individual allergen. Every allergen except Alternaria displayed significant correlation between the serum and turbinate IgE levels. Additionally, each allergen except Alternaria and oak tree resulted in a strong correlation (r > .7) based on the correlation coefficients. Levels of Alternaria were found to be poorly correlative between serum and turbinate tissue, and significance was not achieved (r = -.346, P = .11). CONCLUSION Certain allergen-specific IgE antibodies in the nasal mucosa seem to be highly associated with those in the serum, based upon the significant correlations we found between the two.
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Affiliation(s)
- Alessandra Bliss
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University, Wexner Medical Center, Columbus, OH, USA
| | - Cameron Sheehan
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University, Wexner Medical Center, Columbus, OH, USA
| | - Elizabeth Erwin
- Department of Pediatrics, Division of Allergy and Immunology, Nationwide Children's Hospital, Columbus, OH, USA
| | - Kris Jatana
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University, Wexner Medical Center, Columbus, OH, USA
- Department of Pediatric Otolaryngology-Head and Neck Surgery, Nationwide Children's Hospital, Columbus, OH, USA
| | - Charles A Elmaraghy
- Department of Otolaryngology-Head and Neck Surgery, The Ohio State University, Wexner Medical Center, Columbus, OH, USA
- Department of Pediatric Otolaryngology-Head and Neck Surgery, Nationwide Children's Hospital, Columbus, OH, USA
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Liu D, Wang X, Zhang H. Efficacy and safety of gastrointestinal microbiome supplementation for allergic rhinitis: A systematic review and meta-analysis with trial sequential analysis. PHYTOMEDICINE : INTERNATIONAL JOURNAL OF PHYTOTHERAPY AND PHYTOPHARMACOLOGY 2023; 118:154948. [PMID: 37418839 DOI: 10.1016/j.phymed.2023.154948] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 04/12/2023] [Revised: 06/07/2023] [Accepted: 07/01/2023] [Indexed: 07/09/2023]
Abstract
BACKGROUND Allergic rhinitis (AR) is a non-infective chronic inflammatory disease of nasal mucosa. PURPOSE To evaluate the efficacy and safety of gastrointestinal microbiome supplementation (GMS) for patients with allergic rhinitis (AR), concerning improvement on symptoms and signs, laboratory outcomes, quality of life, and medication scores. METHODS Five English databases were searched up to Dec 12th, 2022. Probiotics, prebiotics, and synbiotics were main therapies or adjuvants in experimental groups. Systematic reviews and meta-analyses were conducted based on the Cochrane systematic review method by using RevMan 5.4 Software, with meta-influence analyses, subgroup-analyses, meta-regression, and publication bias performed for exploration of heterogeneity by Stata V.14. Trial sequential analyses were performed by TSA 0.9, and quality of the results was accessed through the GRADE-pro GDT. RESULTS Finally, extracted from 53 articles, 65 RCTs involving 3,634 participants with sound worldwide representativeness were included. Primary results showed better improvement in GMS groups on TNSS (WMD=1.05, P for WMD=0.004, 95%CI:0.34 to 1.76), overall nasal condition (WMD=1.25, P for WMD<0.001, 95%CI:0.90 to 1.61), overall quality of life (WMD=6.16, P for WMD<0.001, 95%CI:4.92 to 7.40) and medication score (WMD=0.42, P for WMD=0.42, 95%CI:-0.06 to 0.90).However, GMS groups were inferior than the controls concerning reduction on serum total IgE (WMD=-1.81) and ratios of serum Th1/Th2 (WMD=-1.06). Meta-regressions suggested significant (p<0.05) variations of the effects in some comparisons. In addition, results of sub-group analyses firstly revealed potential influence between final results and the variables above. Instantly after intervention, the GRADE levels of evidence were sound, including "High ⨁⨁⨁⨁" in 10, "Moderate ⨁⨁⨁◯" in 33, and "Low ⨁⨁◯◯" in nine comparisons. However, overall certainties decreased obviously during follow-ups. CONCLUSION Overall, our pooled results firstly revealed that GMS yielded acceptable benefits for patients with AR compared with controls with sound certainties, after balancing the benefits and harms.
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Affiliation(s)
- Dongliang Liu
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, PR China
| | - Xilu Wang
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, PR China
| | - Hang Zhang
- Department of Otolaryngology Head and Neck Surgery, Shengjing Hospital of China Medical University, 36 Sanhao Street, Shenyang 110004, PR China.
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Zhang X, Xie L, Fang X. Cell division cycle 42 reflects disease risk, symptoms, Th1/Th2 disproportion, and its short-term variation indicates symptom amelioration after treatment in allergic rhinitis patients. J Clin Lab Anal 2022; 36:e24684. [PMID: 36045593 PMCID: PMC9550962 DOI: 10.1002/jcla.24684] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2022] [Revised: 08/17/2022] [Accepted: 08/19/2022] [Indexed: 11/11/2022] Open
Abstract
BACKGROUND Cell division cycle 42 (CDC42) modulates the pathogenesis of allergic rhinitis (AR) through regulating immunity, allergic response, and T-helper (Th)1/Th2 imbalance. This study aimed to evaluate the potential of CDC42 to reflect disease risk, symptom scores, and Th1/Th2 axis of AR and the correlation of its vertical change with symptom amelioration after treatment. METHODS CDC42, Th1 cells, and Th2 cells in the peripheral blood mononuclear cells (PBMCs) and interferon-γ and interleukin-4 in the serum were determined in 200 AR patients. Simultaneously, PBMC CDC42 was detected in 50 non-atopic obstructive snoring patients [as disease controls (DCs)] and 50 healthy controls (HCs). RESULTS CDC42 was increased in AR patients compared with DCs and HCs (both p < 0.001) but showed no difference between DCs and HCs (p = 0.054). In AR patients, CDC42 was positively linked to rhinorrhea, itching, sneezing, and total nasal symptom scores (TNSS) (all p < 0.05), but not congestion score (p = 0.052). Meanwhile, CDC42 showed positive correlations with Th2 cells (p < 0.001) and interleukin-4 (p = 0.005), a negative correlation with Th1/Th2 axis (p = 0.001), but no correlation with Th1 cells (p = 0.095) or interferon-γ (p = 0.174). Notably, CDC42 at week 4 after treatment (W4) was reduced compared with that at enrollment (W0) (p < 0.001) and positively correlated with TNSS at W4 (p < 0.001); from W0 to W4, CDC42 change also positively correlated with TNSS change (p = 0.004). CONCLUSION CDC42 is elevated and positively correlates with symptom scores and Th2 cells, whose short-term reduction reflects symptom alleviation in AR patients.
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Affiliation(s)
- Xiaote Zhang
- Department of Otolaryngology Head and Neck Surgery, Ningbo Yinzhou No.2 Hospital, Ningbo, China
| | - Lujie Xie
- Department of Otolaryngology, Health Center of Maoshan, Ningbo Yinzhou No.2 Hospital Community, Ningbo, China
| | - Xiaoyun Fang
- Department of Otolaryngology Head and Neck Surgery, Ningbo Yinzhou No.2 Hospital, Ningbo, China
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Awad R, Avital A, Sosnik A. Polymeric nanocarriers for nose-to-brain drug delivery in neurodegenerative diseases and neurodevelopmental disorders. Acta Pharm Sin B 2022; 13:1866-1886. [DOI: 10.1016/j.apsb.2022.07.003] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/04/2022] [Revised: 06/07/2022] [Accepted: 06/10/2022] [Indexed: 11/01/2022] Open
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Morsy MA, Patel SS, Bakrania A, Kandeel M, Nair AB, Shah JN, Akrawi SH, El-Daly M. Ameliorative Effect of a Neoteric Regimen of Catechin plus Cetirizine on Ovalbumin-Induced Allergic Rhinitis in Rats. Life (Basel) 2022; 12:life12060820. [PMID: 35743851 PMCID: PMC9225010 DOI: 10.3390/life12060820] [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: 04/22/2022] [Revised: 05/25/2022] [Accepted: 05/28/2022] [Indexed: 11/30/2022] Open
Abstract
Allergic rhinitis (AR) affects 20–50% of the global population. Available treatments are limited by their adverse effects. We investigated the anti-allergic effects of catechin alone and combined with cetirizine against ovalbumin-induced AR. Rats were sensitized with ovalbumin and received catechin (14 days) and then challenged with aerosolized ovalbumin (1%) to determine AR clinical scores. Histamine, histamine release, and histidine decarboxylase (HDC) activity were determined in blood, peritoneal mast cells, and stomachs, respectively. Vascular permeability and safety were assessed using Evans blue leakage and barbiturate-induced sleeping-time assays, respectively. Catechin and cetirizine binding with HDC was investigated by docking and binding energy analyses. The clinical scores of the combination regimen were superior to either drug alone. All treatments reduced vascular leakage, with no effect on barbiturate-induced sleeping time. Only the catechin-treated rats showed reduced histamine levels and HDC activity. Docking studies revealed that catechin has a 1.34-fold higher extra-precision docking score than L-histidine. The binding energy scores for catechin-HDC, L-histidine-HDC, and histamine-HDC were −50.86, −37.64, and −32.27 kcal/mol, respectively. The binding pattern of catechin was comparable to the standard HDC inhibitor, histidine methyl ester, but with higher binding free energy. Catechin binds the catalytic residue S354, unlike cetirizine. The anti-allergic effects of catechin can be explained by HDC inhibition and possible antihistaminic activity.
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Affiliation(s)
- Mohamed A. Morsy
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (A.B.N.); (S.H.A.)
- Department of Pharmacology, Faculty of Medicine, Minia University, El-Minia 61511, Egypt
- Correspondence: (M.A.M.); (S.S.P.)
| | - Snehal S. Patel
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Ahmedabad 382481, Gujarat, India;
- Correspondence: (M.A.M.); (S.S.P.)
| | - Anita Bakrania
- Department of Pharmacology, Institute of Pharmacy, Nirma University, Ahmedabad 382481, Gujarat, India;
| | - Mahmoud Kandeel
- Department of Biomedical Sciences, College of Veterinary Medicine, King Faisal University, Al-Ahsa 31982, Saudi Arabia;
- Department of Pharmacology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh 33516, Egypt
| | - Anroop B. Nair
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (A.B.N.); (S.H.A.)
| | - Jigar N. Shah
- Department of Pharmaceutics, Institute of Pharmacy, Nirma University, Ahmedabad 382481, Gujarat, India;
| | - Sabah H. Akrawi
- Department of Pharmaceutical Sciences, College of Clinical Pharmacy, King Faisal University, Al-Ahsa 31982, Saudi Arabia; (A.B.N.); (S.H.A.)
| | - Mahmoud El-Daly
- Department of Pharmacology & Toxicology, Faculty of Pharmacy, Minia University, El-Minia 61511, Egypt;
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