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Abu SL, Hehar NK, Chigbu DI. Novel therapeutic receptor agonists and antagonists in allergic conjunctivitis. Curr Opin Allergy Clin Immunol 2024; 24:380-389. [PMID: 39079155 DOI: 10.1097/aci.0000000000001010] [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: 08/30/2024]
Abstract
PURPOSE OF REVIEW Allergic conjunctivitis is characterized by the development of pathophysiological changes to the ocular surface, which occurs when pro-allergic and pro-inflammatory mediators interact with their cognate receptors expressed on immune and nonimmune cells. Traditional treatments with antihistamines and corticosteroids provide relief, but there is a need for more efficacious and tolerable long-term therapy with a better safety profile. This article aims to provide an overview of the mode of action and clinical application of agonist therapies targeting glucocorticoid, melanocortin, and toll-like receptors, as well as antagonist therapies targeting cytokine, chemokine, integrin, and histamine receptors. RECENT FINDINGS There has been considerable advancement in immunology and pharmacology, as well as a greater understanding of the cellular and molecular mechanisms of allergic conjunctivitis. Recent research advancing therapy for allergic conjunctivitis has focused on developing synthetic molecules and biologics that can interfere with the process of the allergic immune reaction. SUMMARY This review discusses novel therapeutic receptors being explored agonistically or antagonistically to develop alternative treatment options for allergic conjunctivitis. These novel approaches hold promise for improving the management of allergic eye diseases, offering patients hope for more effective and safer treatment options in the future.
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Affiliation(s)
- Sampson L Abu
- Pennsylvania College of Optometry, Salus at Drexel University, Elkins Park, Pennsylvania, USA
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Lin YJ, Zimmermann J, Schülke S. Novel adjuvants in allergen-specific immunotherapy: where do we stand? Front Immunol 2024; 15:1348305. [PMID: 38464539 PMCID: PMC10920236 DOI: 10.3389/fimmu.2024.1348305] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/02/2023] [Accepted: 02/05/2024] [Indexed: 03/12/2024] Open
Abstract
Type I hypersensitivity, or so-called type I allergy, is caused by Th2-mediated immune responses directed against otherwise harmless environmental antigens. Currently, allergen-specific immunotherapy (AIT) is the only disease-modifying treatment with the potential to re-establish clinical tolerance towards the corresponding allergen(s). However, conventional AIT has certain drawbacks, including long treatment durations, the risk of inducing allergic side effects, and the fact that allergens by themselves have a rather low immunogenicity. To improve AIT, adjuvants can be a powerful tool not only to increase the immunogenicity of co-applied allergens but also to induce the desired immune activation, such as promoting allergen-specific Th1- or regulatory responses. This review summarizes the knowledge on adjuvants currently approved for use in human AIT: aluminum hydroxide, calcium phosphate, microcrystalline tyrosine, and MPLA, as well as novel adjuvants that have been studied in recent years: oil-in-water emulsions, virus-like particles, viral components, carbohydrate-based adjuvants (QS-21, glucans, and mannan) and TLR-ligands (flagellin and CpG-ODN). The investigated adjuvants show distinct properties, such as prolonging allergen release at the injection site, inducing allergen-specific IgG production while also reducing IgE levels, as well as promoting differentiation and activation of different immune cells. In the future, better understanding of the immunological mechanisms underlying the effects of these adjuvants in clinical settings may help us to improve AIT.
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Affiliation(s)
- Yen-Ju Lin
- Section Molecular Allergology, Paul-Ehrlich-Institut, Langen, Germany
| | | | - Stefan Schülke
- Section Molecular Allergology, Paul-Ehrlich-Institut, Langen, Germany
- Section Research Allergology (ALG 5), Division of Allergology, Paul-Ehrlich-Institut, Langen, Germany
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Starchenka S, Oluwayi K, Heath M, Armfield O, Shamji M, Layhadi J, Lis K, Cadavez L, Rusyn O, Skinner M, De Kam PJ. Peripheral blood mononuclear cell transcriptome profile in a clinical trial with subcutaneous, grass pollen allergoid immunotherapy. Clin Exp Allergy 2024; 54:130-142. [PMID: 38169056 DOI: 10.1111/cea.14432] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/14/2023] [Revised: 11/08/2023] [Accepted: 11/13/2023] [Indexed: 01/05/2024]
Abstract
INTRODUCTION Allergen-specific immunotherapy (AIT) is the only disease-modifying treatment in allergic airway diseases. Underlying immunological mechanisms and candidate biomarkers, which may be translated into predictive/surrogate measures of clinical efficacy, remain an active area of research. The aim of this study was to evaluate Pollinex Quattro (PQ) Grass AIT induced immunomodulatory mechanisms, based on transcriptome profiling of peripheral blood mononuclear cells. METHODS 119 subjects with grass pollen induced seasonal allergic rhinitis (SAR) were randomized in a 2:2:1:1 ratio to receive a cumulative dose of PQ Grass as a conventional or extended pre-seasonal regimen, placebo, or placebo with MicroCrystalline Tyrosine. Gene expression analysis was an exploratory endpoint evaluated in a subgroup of 30 subjects randomly selected from the four treatment arms. Samples were collected at three time points: screening (baseline), before the start of the grass pollen season and at the end of the season. This study was funded by the manufacturer of PQ. RESULTS Transcriptome analysis demonstrated that the most significant changes in gene expression, for both treatment regimens, were at the end of the grass pollen season, with the main Th1 candidate molecules (IL-12A, IFNγ) upregulated and Th2 signature cytokines downregulated (IL-4, IL-13, IL-9) (p < .05). Canonical pathways analysis demonstrated Th1, Th2, Th17 and IL-17 as the most significantly enriched pathways based on absolute value of activation z-score (IzI score ≥ 2, p < .05). Upstream regulator analysis showed pronounced inhibition of pro-inflammatory allergic molecules IgE, IL-17A, IL-17F, IL-25 (IL-17E) (IzI score ≥ 2, FDR < 0.05) and activation of pro-tolerogenic molecules IL-12A, IL-27, IL-35 (EBI3) at the end of the grass pollen season. CONCLUSION Peripheral blood mononuclear cells transcriptome profile showed an inhibition of Th2, Th17 pro-inflammatory allergic responses and immune deviation towards Th1 responses. PQ Grass extended regimen exhibited a superior mechanistic efficacy profile in comparison with PQ conventional regimen.
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Affiliation(s)
| | | | | | | | - Mohamed Shamji
- Immunomodulation and Tolerance Group, Allergy and Clinical Immunology, Department of National Heart and Lung Institute, Imperial College London, London, UK
- Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, UK
| | - Janice Layhadi
- Immunomodulation and Tolerance Group, Allergy and Clinical Immunology, Department of National Heart and Lung Institute, Imperial College London, London, UK
- Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, UK
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Pfaar O, Sager A, Mösges R, Worm M. A high-dose, depigmented polymerized birch pollen extract for subcutaneous allergen immunotherapy has a favourable efficacy/safety ratio. Clin Transl Allergy 2023; 13:e12315. [PMID: 38006380 PMCID: PMC10646866 DOI: 10.1002/clt2.12315] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/21/2023] [Revised: 10/19/2023] [Accepted: 10/28/2023] [Indexed: 11/27/2023] Open
Abstract
BACKGROUND Subcutaneous allergen immunotherapy (SCIT) with depigmented, polymerized (DPP) birch pollen extract has been marketed at doses of up to 1000 DPP units/mL since 2001. We sought to determine the dose-dependent efficacy of a DPP birch pollen extract formulation in patients suffering from birch-pollen-induced allergic rhinitis or rhinoconjunctivitis with or without intermittent asthma. METHODS A titrated conjunctival provocation test (CPT) was applied as a surrogate marker. This Phase II randomized, double-blind, parallel-group, dose-ranging clinical trial was performed at 39 centres in Germany, Lithuania and Poland. After randomization to four dose-level groups (100, 1000, 5000 and 10,000 DPP units/mL) and up-dosing, participants received maintenance SCIT with five monthly subcutaneous injections. The primary endpoint was the proportion of patients in whom a higher concentration of birch pollen (vs. baseline) was needed to elicit a positive CPT. RESULTS Three hundred forty-three patients were included (mean (range) age: 42.6 (19-70)). The highest CPT responder rates were seen in the higher dose-level groups. In the intention-to-treat analysis, the difference between the 100 and 10,000 groups was statistically significant (p = 0.0118). Although the proportion of patients with ≥1 treatment-emergent adverse events increased with the dose, almost all these events were mild (65.6%) or moderate (18.5%). CONCLUSION Judging by the results of a CPT, the efficacy/safety ratio in SCIT appears to be favourable for a high-dose-level preparation of a DPP birch pollen extract.
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Affiliation(s)
- Oliver Pfaar
- Department of Otorhinolaryngology, Head and Neck Surgery, Section of Rhinology and AllergyUniversity Hospital MarburgPhilipps‐Universität MarburgMarburgGermany
| | | | - Ralph Mösges
- ClinCompetence Cologne GmbHCologneGermany
- Institute of Medical Statistics and Computational BiologyFaculty of MedicineUniversity of CologneCologneNorth Rhine‐WestphaliaGermany
| | - Margitta Worm
- Division of Allergy and ImmunologyDepartment of Dermatology, Venereology and AllergyCharité‐Universitätsmedizin BerlinBerlinGermany
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de Kam PJ, Zielen S, Bernstein JA, Berger U, Berger M, Cuevas M, Cypcar D, Fuhr-Horst A, Greisner WA, Jandl M, Laßmann S, Worm M, Matz J, Sher E, Smith C, Steven GC, Mösges R, Shamji MH, DuBuske L, Borghese F, Oluwayi K, Zwingers T, Seybold M, Armfield O, Heath MD, Hewings SJ, Kramer MF, Skinner MA. Short-course subcutaneous treatment with PQ Grass strongly improves symptom and medication scores in grass allergy. Allergy 2023; 78:2756-2766. [PMID: 37366581 DOI: 10.1111/all.15788] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/17/2023] [Revised: 05/05/2023] [Accepted: 06/04/2023] [Indexed: 06/28/2023]
Abstract
BACKGROUND A modified grass allergen subcutaneous immunotherapy (SCIT) product with MicroCrystalline Tyrosine and monophosphoryl lipid-A as an adjuvant system (Grass MATA MPL [PQ Grass]) is being developed as short-course treatment of grass-pollen allergic rhinitis (SAR) and/or rhinoconjunctivitis. We sought to evaluate the combined symptom and medication score (CSMS) of the optimized cumulative dose of 27,600 standardized units (SU) PQ Grass in a field setting prior to embarking on a pivotal Phase III trial. METHODS In this exploratory, randomized, double-blind, placebo-controlled trial subjects were enrolled across 14 sites (Germany and the United States of America). Six pre-seasonal subcutaneous injections of PQ Grass (using conventional or extended regimens) or placebo were administered to 119 subjects (aged 18-65 years) with moderate-to-severe SAR with or without asthma that was well-controlled. The primary efficacy endpoint was CSMS during peak grass pollen season (GPS). Secondary endpoints included Rhinoconjunctivitis Quality of Life Questionnaire standardized (RQLQ-S) and allergen-specific IgG4 response. RESULTS The mean CSMS compared to placebo was 33.1% (p = .0325) and 39.5% (p = .0112) for the conventional and extended regimens, respectively. An increase in IgG4 was shown for both regimens (p < .01) as well as an improvement in total RQLQ-S for the extended regimen (mean change -0.72, p = .02). Both regimens were well-tolerated. CONCLUSIONS This trial demonstrated a clinically relevant and statistically significant efficacy response to PQ Grass. Unprecedented effect sizes were reached for grass allergy of up to ≈40% compared to placebo for CSMS after only six PQ Grass injections. Both PQ Grass regimens were considered equally safe and well-tolerated. Based on enhanced efficacy profile extended regime will be progressed to the pivotal Phase III trial.
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Affiliation(s)
| | - S Zielen
- Children and Adolescents Department, Allergology, Pulmonology & Cystic Fibrosis, Goethe University, Frankfurt, Germany
| | - J A Bernstein
- Bernstein Clinical Research Center, LLC, Cincinnati, Ohio, USA
| | - U Berger
- Aerobiology and Pollen Research Unit, Department of Oto-Rhino-Laryngology, Medical University Vienna, Vienna, Austria
| | - M Berger
- Department of Otorhinolaryngology, Wiener Gesundheitsverbund, Hospital Hietzing, Vienna, Austria
| | - M Cuevas
- Clinic and Polyclinic of Otorhinolaryngology, University Clinic Carl Gustav Carus, Dresden, Germany
| | - D Cypcar
- Allergy Partners of Western North Carolina, Asheville, North Carolina, USA
| | - A Fuhr-Horst
- ENT Research- Institut für klinische Studien, Essen, Germany
| | - W A Greisner
- Bluegrass Allergy Research, Lexington, Kentucky, USA
| | - M Jandl
- Hamburger Institut für Therapieforschung GmbH, Hamburg, Germany
| | - S Laßmann
- Studienzentrum Dr. Sabine Laßmann, Saalfeld, Germany
| | - M Worm
- Department of Dermatology and Allergy-Charite Campus Mitte, Universitätsmedizin Berlin, Berlin, Germany
| | - J Matz
- Chesapeake Clinical Research, Inc, White Marsh, Maryland, USA
| | - E Sher
- Allergy Partners of New Jersey, Ocean Township, New Jersey, USA
| | - C Smith
- Certified Research Associates, Cortland, New York, USA
| | - G C Steven
- Allergy Asthma & Sinus Center, S.C., Greenfield, Wisconsin, USA
| | - R Mösges
- IMSB (Institute of Computational Biology and Medical Statistics), University at Cologne, Cologne, Germany
- ClinCompetence, Cologne, Germany
| | - M H Shamji
- Immunomodulation and Tolerance Group, Allergy and Clinical Immunology, Department of National Heart and Lung Institute, Imperial College London, London, UK
- Asthma UK Centre in Allergic Mechanisms of Asthma, Imperial College London, London, UK
| | - L DuBuske
- Division of Allergy and Immunology, Department of Internal Medicine, George Washington University Hospital, Washington, DC, USA
| | | | - K Oluwayi
- Allergy Therapeutics PLC, Worthing, UK
| | | | - M Seybold
- Allergy Therapeutics PLC, Worthing, UK
| | | | - M D Heath
- Allergy Therapeutics PLC, Worthing, UK
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Wenger M, Grosse-Kathoefer S, Kraiem A, Pelamatti E, Nunes N, Pointner L, Aglas L. When the allergy alarm bells toll: The role of Toll-like receptors in allergic diseases and treatment. Front Mol Biosci 2023; 10:1204025. [PMID: 37426425 PMCID: PMC10325731 DOI: 10.3389/fmolb.2023.1204025] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2023] [Accepted: 06/08/2023] [Indexed: 07/11/2023] Open
Abstract
Toll-like receptors of the human immune system are specialized pathogen detectors able to link innate and adaptive immune responses. TLR ligands include among others bacteria-, mycoplasma- or virus-derived compounds such as lipids, lipo- and glycoproteins and nucleic acids. Not only are genetic variations in TLR-related genes associated with the pathogenesis of allergic diseases, including asthma and allergic rhinitis, their expression also differs between allergic and non-allergic individuals. Due to a complex interplay of genes, environmental factors, and allergen sources the interpretation of TLRs involved in immunoglobulin E-mediated diseases remains challenging. Therefore, it is imperative to dissect the role of TLRs in allergies. In this review, we discuss i) the expression of TLRs in organs and cell types involved in the allergic immune response, ii) their involvement in modulating allergy-associated or -protective immune responses, and iii) how differential activation of TLRs by environmental factors, such as microbial, viral or air pollutant exposure, results in allergy development. However, we focus on iv) allergen sources interacting with TLRs, and v) how targeting TLRs could be employed in novel therapeutic strategies. Understanding the contributions of TLRs to allergy development allow the identification of knowledge gaps, provide guidance for ongoing research efforts, and built the foundation for future exploitation of TLRs in vaccine design.
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Jiang S, Xie S, Tang Q, Zhang H, Xie Z, Zhang J, Jiang W. Evaluation of Intralymphatic Immunotherapy in Allergic Rhinitis Patients: A Systematic Review and Meta-analysis. Mediators Inflamm 2023; 2023:9377518. [PMID: 37197570 PMCID: PMC10185423 DOI: 10.1155/2023/9377518] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2022] [Revised: 11/22/2022] [Accepted: 03/18/2023] [Indexed: 05/19/2023] Open
Abstract
Background Intralymphatic immunotherapy (ILIT) is short-course administration of allergen-specific immunotherapy (AIT). This study is aimed at assessing the clinical efficacy and safety of ILIT in patients with allergic rhinitis (AR). Methods MEDLINE, PUBMED, and Cochrane Library were used to conduct electronic searches for clinical trials comparing ILIT and placebo in patients with AR. The final search took place on August 24, 2022. Cochrane Handbook for Systematic Reviews of Interventions was used to assess the risk of bias in the included studies. The outcomes included combined symptom and medication scores (CSMS), visual analog scale (VAS), allergic rhinoconjunctivitis quality of life (RQLQ), Skin-prick test (SPT), and adverse events (AEs). Data were synthesized as mean difference (MD)/standard mean difference (SMD) or risk difference (RD) and 95% confidence interval (CI). Results Thirteen studies (454 participants) were included in this study. The ILIT group had better clinical improvement on the CSMS (random effects model, SMD-0.85, 95% CI [-1.58, -0.11], P = 0.02) and RQLQ (fixed-effects model, MD-0.42, 95% CI [0.69, 0.15], P = 0.003) than the placebo group. The booster injection was beneficial for CSMS (P < 0.0001), and the 4-week injection interval was superior to the 2-week injection period for improving VAS (P < 0.0001). Local swelling or erythema was the main AE following injection (random effects model, RD 0.16, 95% CI [0.05, 0.27], P = 0.005). Discussion. For individuals with AR, ILIT is safe and effective. ILIT alleviates clinical symptoms and reduces pharmaceutical consumption without causing severe AEs. However, the validity of this study is compromised by the substantial heterogeneity and risk of bias in the included researches. RegistrationCRD42022355329.
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Affiliation(s)
- Sijie Jiang
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital of Central South University, Changsha, China
- Hunan Province Key Laboratory of Otolaryngology Critical Diseases, Xiangya Hospital of Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, China
| | - Shaobing Xie
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital of Central South University, Changsha, China
- Hunan Province Key Laboratory of Otolaryngology Critical Diseases, Xiangya Hospital of Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, China
| | - Qingping Tang
- Department of Rehabilitation, Brain Hospital of Hunan Province, Hunan University of Chinese Medicine, Changsha, China
| | - Hua Zhang
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital of Central South University, Changsha, China
- Hunan Province Key Laboratory of Otolaryngology Critical Diseases, Xiangya Hospital of Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, China
| | - Zhihai Xie
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital of Central South University, Changsha, China
- Hunan Province Key Laboratory of Otolaryngology Critical Diseases, Xiangya Hospital of Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, China
| | - Junyi Zhang
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital of Central South University, Changsha, China
- Hunan Province Key Laboratory of Otolaryngology Critical Diseases, Xiangya Hospital of Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, China
| | - Weihong Jiang
- Department of Otolaryngology Head and Neck Surgery, Xiangya Hospital of Central South University, Changsha, China
- Hunan Province Key Laboratory of Otolaryngology Critical Diseases, Xiangya Hospital of Central South University, Changsha, China
- National Clinical Research Center for Geriatric Disorders, Xiangya Hospital of Central South University, Changsha, China
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Allergen challenge tests in allergen immunotherapy: State of the art. Allergol Select 2023; 7:25-32. [PMID: 36925996 PMCID: PMC10012425 DOI: 10.5414/alx02322e] [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: 01/31/2022] [Accepted: 01/13/2023] [Indexed: 03/05/2023] Open
Abstract
INTRODUCTION Treatment effects in allergen immunotherapy (AIT) studies are based on symptomatic improvement, and evaluations of naturally exposed patients do often show weak efficacy. Allergen challenge tests, such as conjunctival (CAC), nasal (NAC), or bronchial (BAC) challenge tests, or challenges in allergen exposure chambers (AEC) are accepted by regulators for AIT phase II studies only. MATERIALS AND METHODS This review aims to describe different allergen challenge test methods, summarizes safety and limitations for each, and discusses their potential for use in AIT trials. RESULTS Organ-specific allergen challenges provide information about individual reactivity, reaction threshold, and organ-specific efficacy of AIT. AECs, targeting all affected organs simultaneously, were developed to investigate disease mechanisms and treatment effects under controlled and reproducible conditions. CONCLUSION A high level of standardization is existing for NAC only; in CAC and BAC, the toolbox is limited to subjective symptom scoring with no validated objective parameters identified yet. AECs are complex and heterogenous; correlation of systems and comparability of study data is claimed. All challenge methods are safe when conducted by experienced staff.
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Abstract
PURPOSE OF REVIEW The purpose of this article is to provide an overview of the literature pertaining to the use of MicroCrystalline Tyrosine (MCT) in the immunotherapy with an emphasis on recent developments. RECENT FINDINGS In addition to significant effectiveness and safety profiles, additional aspects of interest such as booster immunotherapy concepts, sustained clinical effects, long-term efficacy and disease-modifying effects are being focused on in the recently published studies. The depot adjuvant MCT also shows potential in promising disease-challenge models such as for malaria and melanoma. SUMMARY MCT-adsorbed immunotherapy products have been shown to provide convincing overall safety, tolerability and efficacy outcomes, as well in vulnerable groups such as children and asthmatic patients.
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Affiliation(s)
- Helal Al Saleh
- Department of Otolaryngology, Faculty of Medicine, University of Damascus, Damascus, Syria
| | - Ralph Mösges
- Institute of Medical Statistics and Computational Biology, University of Cologne, Cologne, Germany
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Tie K, Miller C, Zanation AM, Ebert CS. Subcutaneous Versus Sublingual Immunotherapy for Adults with Allergic Rhinitis: A Systematic Review with Meta-Analyses. Laryngoscope 2021; 132:499-508. [PMID: 33929726 DOI: 10.1002/lary.29586] [Citation(s) in RCA: 12] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/25/2021] [Revised: 04/13/2021] [Accepted: 04/14/2021] [Indexed: 11/11/2022]
Abstract
OBJECTIVES To determine whether subcutaneous immunotherapy (SCIT) or sublingual immunotherapy (SLIT) better improves patient outcomes and quality of life for adults with allergic rhinitis or rhinoconjunctivitis (AR/C) with or without mild to moderate asthma. METHODS Systematic review methodology was based on the Cochrane Collaboration handbook and Preferred Reporting Items for Systematic Reviews and Meta-analyses. Four databases (PubMed, Cochrane Library, EMBASE, and Web of Science) were queried from inception to July 30, 2020. Two independent reviewers screened potentially relevant studies and assessed risk of bias. Outcomes of interest were symptom score (SS), medication score (MS), combined symptom medication score (CSMS), and Rhinoconjunctivitis Quality of Life Questionnaire (RQLQ). Meta-analyses with an adjusted indirect comparison were conducted in RevMan 5.4.1. RESULTS Seven SCIT versus SLIT randomized controlled trials (RCTs) demonstrated no significant differences for any outcomes, but insufficient data precluded direct meta-analysis. For the adjusted indirect comparison, 46 RCTs over 39 studies were included for SCIT versus placebo (n = 13) and SLIT versus placebo (n = 33). Statistically significant results favoring SCIT were found for SS (standardized mean difference [SMD] = 0.40; 95% confidence interval [CI] = 0.31-0.49), MS (SMD = 0.26; 95% CI = 0.14-0.39), CSMS (SMD = 0.42; 95% CI = 0.17-0.67), and RQLQ (MD = 0.24; 95% CI = 0.04-0.44). Statistically significant results favoring SLIT were found for SS (SMD = 0.42; 95% CI = 0.32-0.53), MS (SMD = 0.40; 95% CI = 0.28-0.53), CSMS (SMD = 0.37; 95% CI = 0.29-0.45), and RQLQ (MD = 0.32; 95% CI = 0.20-0.43). No significant differences were found between SCIT and SLIT for SS (SMD = -0.02; 95% CI = -0.15 to 0.11), MS (SMD = -0.14; 95% CI = -0.31 to 0.03), CSMS (SMD = 0.05; 95% CI = -0.21 to 0.31), or RQLQ (MD = -0.08; 95% CI = -0.31 to 0.15). CONCLUSION SCIT and SLIT are comparably effective treatments for adults with AR/C. More RCTs analyzing SCIT versus SLIT are needed to directly compare the two. Laryngoscope, 2021.
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Affiliation(s)
- Kevin Tie
- University of North Carolina School of Medicine, Chapel Hill, North Carolina, U.S.A
| | - Craig Miller
- Department of Otolaryngology-Head & Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, North Carolina, U.S.A
| | - Adam M Zanation
- Department of Otolaryngology-Head & Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, North Carolina, U.S.A
| | - Charles S Ebert
- Department of Otolaryngology-Head & Neck Surgery, University of North Carolina School of Medicine, Chapel Hill, North Carolina, U.S.A
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11
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Heath MD, Mohsen MO, de Kam PJ, Carreno Velazquez TL, Hewings SJ, Kramer MF, Kündig TM, Bachmann MF, Skinner MA. Shaping Modern Vaccines: Adjuvant Systems Using MicroCrystalline Tyrosine (MCT ®). Front Immunol 2020; 11:594911. [PMID: 33324411 PMCID: PMC7721672 DOI: 10.3389/fimmu.2020.594911] [Citation(s) in RCA: 11] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/14/2020] [Accepted: 10/19/2020] [Indexed: 12/13/2022] Open
Abstract
The concept of adjuvants or adjuvant systems, used in vaccines, exploit evolutionary relationships associated with how the immune system may initially respond to a foreign antigen or pathogen, thus mimicking natural exposure. This is particularly relevant during the non-specific innate stage of the immune response; as such, the quality of this response may dictate specific adaptive responses and conferred memory/protection to that specific antigen or pathogen. Therefore, adjuvants may optimise this response in the most appropriate way for a specific disease. The most commonly used traditional adjuvants are aluminium salts; however, a biodegradable adjuvant, MCT®, was developed for application in the niche area of allergy immunotherapy (AIT), also in combination with a TLR-4 adjuvant-Monophosphoryl Lipid A (MPL®)-producing the first adjuvant system approach for AIT in the clinic. In the last decade, the use and effectiveness of MCT® across a variety of disease models in the preclinical setting highlight it as a promising platform for adjuvant systems, to help overcome the challenges of modern vaccines. A consequence of bringing together, for the first time, a unified view of MCT® mode-of-action from multiple experiments and adjuvant systems will help facilitate future rational design of vaccines while shaping their success.
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Affiliation(s)
- Matthew D. Heath
- Allergy Therapeutics (UK) Ltd, Worthing, United Kingdom
- Bencard Adjuvant Systems [a Division of Allergy Therapeutics (UK) Ltd], Worthing, United Kingdom
| | - Mona O. Mohsen
- Interim Translational Research Institute “iTRI”, National Center for Cancer Care and Research (NCCCR), Doha, Qatar
- Department of BioMedical Research, Immunology RIA, University of Bern, Bern, Switzerland
| | | | | | - Simon J. Hewings
- Allergy Therapeutics (UK) Ltd, Worthing, United Kingdom
- Bencard Adjuvant Systems [a Division of Allergy Therapeutics (UK) Ltd], Worthing, United Kingdom
| | - Matthias F. Kramer
- Bencard Adjuvant Systems [a Division of Allergy Therapeutics (UK) Ltd], Worthing, United Kingdom
- Bencard Allergie (GmbH), München, Germany
| | | | - Martin F. Bachmann
- Department of BioMedical Research, Immunology RIA, University of Bern, Bern, Switzerland
- Jenner Institute, Nuffield Department of Medicine, University of Oxford, Oxford, United Kingdom
| | - Murray A. Skinner
- Allergy Therapeutics (UK) Ltd, Worthing, United Kingdom
- Bencard Adjuvant Systems [a Division of Allergy Therapeutics (UK) Ltd], Worthing, United Kingdom
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Starchenka S, Heath MD, Lineberry A, Higenbottam T, Skinner MA. Transcriptome analysis and safety profile of the early-phase clinical response to an adjuvanted grass allergoid immunotherapy. World Allergy Organ J 2019; 12:100087. [PMID: 31768216 PMCID: PMC6872854 DOI: 10.1016/j.waojou.2019.100087] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2019] [Revised: 10/11/2019] [Accepted: 10/23/2019] [Indexed: 12/24/2022] Open
Abstract
Background Specific immunotherapy is the only type of disease-modifying treatment, which induces rapid desensitization and long-term sustained unresponsiveness in patients with seasonal allergic rhinoconjunctivitis. The safety and tolerability of a new cumulative dose regimen of 35600 SU Grass MATA MPL for subcutaneous immunotherapy were assessed in pre-seasonal, single-blind, placebo controlled Phase I clinical study. Underlying immunological mechanisms were explored using transcriptome analysis of peripheral blood mononuclear cells. Methods Study subjects with a history of moderate to severe seasonal allergic rhinitis and/or conjunctivitis (SAR) due to grass (Pooideae) pollen exposure were randomized on a 1:1 ratio to receive either six 1.0 mL injections of cumulative dose regimen 35600 SU of Grass MATA MPL or placebo. The study consisted of three periods: screening, randomization and treatment and End of Study period. Blood samples were taken for clinical safety laboratory assessments and for the assessment of gene expression analysis during screening visit and End of Study visit. The safety statistics was calculated using Fisher's exact test. Delta Delta Ct method analysis of RT2 Profiler PCR Array gene expression results was used to calculate changes in gene expression level. Genes with the absolute value of log2 fold change greater than ±1.1 and p-value less than 0.05 were identified as differentially expressed and underwent IPA data analysis. Results The results of the study indicated that the higher cumulative dose regimen of the immunotherapy was well-tolerated. Changes in gene expression profile were associated with early immune responses implicating innate and adaptive immune mechanisms. Pathways and mechanistic network analysis via IPA mapped differentially expressed genes onto canonical pathways related to T cell differentiation, cytokine signalling and Th1/Th2 activation pathways. The transcriptome findings of the study could be further verified in large-scale field studies in order to explore their potential as predictive markers of successful immunotherapy. Conclusions The higher dose cumulative regime 35600 SU of Grass MATA MPL vaccine was well tolerated and safe. Molecular markers IL-27, IL-10, IL-4, TNF, IFNγ, TGFβ and TLR4 were the main predicted molecular drivers of the observed gene expression changes following early stages of SIT with Grass MATA MPL immunotherapy.
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Key Words
- ADRs, adverse drug reactions
- AE, adverse events
- AIT, allergen mmunotherapy
- ARC, adverse reaction complex
- Allergen immunotherapy
- Allergoid
- DC, dendritic cell
- EAACI, European Academy of Allergy and Clinical Immunology
- FEV, forced expiratory volume
- FVC, forced vital capacity
- Grass pollen
- IPA, Ingenuity Pathway Analysis
- MATA, modified allergen tyrosine adsorbate
- MCT, microcrystalline tyrosine
- MPL, monophosphoryl lipid A
- SAEs, serious adverse events
- SAR, seasonal allergic rhinoconjunctivitis
- SD, standard deviation
- SIT, specific immunotherapy
- SU, standardized units
- Safety
- TEAEs, treatment-emergent adverse events
- TLR, toll-like receptor
- TSS, total symptom score
- Transcriptome
- URA, Upstream Regulator Analysis
- mRNA, messenger ribosomal nucleic acid
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Affiliation(s)
- Sviatlana Starchenka
- Corresponding author. Allergy Therapeutics (UK) Ltd, Worthing, BN14 8SA, United Kingdom.
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