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Benign nasal septal tumors are rare and exhibit various histologic features. It is necessary to treat them based on a plan that considers the prognosis, functionality, and esthetics. We report two similar and rare cases of nasal septal tumors with different diagnoses that we treated with nasal septal tumor resection. Eosinophilic angiocentric disease was the most likely diagnosis of one of the two cases, but it was not confirmed by the IgG4:IgG ratio. The other case was diagnosed as extranodal Rosai-Dorfman disease based on its histological features. The histological appearance of nasal septal tumors varies widely; therefore, a careful diagnosis based on both clinical and pathological perspectives is required. [ABSTRACT FROM AUTHOR]

Preoperative simulation using a three‐dimensional printer is effective to perform safe surgery by knowing the range limit of drilling in the temporal bone. Moreover, simulations using models are thought to be useful for education of young surgeon. [ABSTRACT FROM AUTHOR]

Sublingual immunotherapy for Japanese cedar pollinosis can improve the symptoms of allergic rhinitis and modify its natural course. However, sublingual immunotherapy requires a long treatment period and some patients do not respond to treatment. In this study, we aimed to identify biomarkers that could predict the efficacy of sublingual immunotherapy at an early stage. In this study, 40 patients from phase III trials were recruited and divided into good and poor response groups. Using peripheral blood mononuclear cells from before and two months after the start of medication, microarray, discriminant analysis, and real-time polymerase chain reaction were performed to extract candidate genes that could be biomarkers. Furthermore, these genes were validated in 30 patients in general clinical practice. Complement factor H was upregulated in the good response group and downregulated in the poor response group. Complement factor H may be a useful biomarker for predicting the efficacy of sublingual immunotherapy for Japanese cedar pollinosis at early time points after treatment initiation. [ABSTRACT FROM AUTHOR]

Allergen exposure chambers (AECs) can be used for controlled exposure to allergenic and non‐allergenic airborne particles in an enclosed environment, in order to (i) characterize the pathological features of respiratory diseases and (ii) contribute to and accelerate the clinical development of pharmacological treatments and allergen immunotherapy for allergic disease of the respiratory tract (such as allergic rhinitis, allergic rhinoconjunctivitis, and allergic asthma). In the guidelines of the European Medicines Agency for the clinical development of products for allergen immunotherapy (AIT), the role of AECs in determining primary endpoints in dose‐finding Phase II trials is emphasized. Although methodologically insulated from the variability of natural pollen exposure, chamber models remain confined to supporting secondary, rather than primary, endpoints in Phase III registration trials. The need for further validation in comparison with field exposure is clearly mandated. On this basis, the European Academy of Allergy and Clinical Immunology (EAACI) initiated a Task Force in 2015 charged to gain a better understanding of how AECs can generate knowledge about respiratory allergies and can contribute to the clinical development of treatments. Researchers working with AECs worldwide were asked to provide technical information in eight sections: (i) dimensions and structure of the AEC, (ii) AEC staff, (iii) airflow, air processing, and operating conditions, (iv) particle dispersal, (v) pollen/particle counting, (vi) safety and non‐contamination measures, (vii) procedures for symptom assessments, (viii) tested allergens/substances and validation procedures. On this basis, a minimal set of technical requirements for AECs applied to the field of allergology is proposed. [ABSTRACT FROM AUTHOR]

If you suspect pulsatile tinnitus from a medical interview, you should check for jugular bulb diverticulum and cortical bone defects on temporal bone CT, in addition to thorough physical examination and contrast‐enhanced imaging. [ABSTRACT FROM AUTHOR]

Background: No comparative study of antihistamines that differ in structural system has been conducted in allergic rhinitis. Objective: This was a randomized, double-blind, crossover comparative study to verify the efficacy of antihistamines that differ in structural system. Methods: A total of 50 patients with moderate or more severe Japanese cedar pollen-induced allergic rhinitis were randomized to receive either placebo, desloratadine 5 mg (a tricyclic), or levocetirizine 5 mg (a piperazine). One dose of the study drug was orally administered at 9 pm on the day before a pollen exposure test, which was performed for 3 h (9 a.m. to 12 p.m.) to assess symptoms in an environmental challenge chamber (ECC). Nasal and ocular symptoms were compared at an airborne pollen level of 8,000 grains/m3. The primary endpoint was mean total nasal symptom score (TNSS) from 120 to 180 min in the ECC. Subjects with a difference of ≥1 in TNSS between 2 drugs were extracted to the relevant drug-responsive group. Results: The difference in TNSS from placebo was –2.42 (p < 0.0001) with levocetirizine and –1.66 (p < 0.01) with desloratadine, showing that both drugs were significantly more effective than placebo in controlling symptoms, but with no statistically significant difference between the 2 drugs. There were 12 subjects in the desloratadine-responsive group and 24 subjects in the levocetirizine-responsive group, with no contributor to response was detected. Conclusion: Levocetirizine tended to control nasal symptoms more effectively than desloratadine. However, the response to each antihistamine varied among individuals and the predictors to the response are unknown. Clinical Trial Registration number: UMIN ID: UMIN000029653. [ABSTRACT FROM AUTHOR]

Background: Due to the strong tumoricidal activities of activated natural killer T (NKT) cells, invariant NKT cell-based immunotherapy has shown promising clinical efficacy. However, suppressive factors, such as regulatory T cells (Tregs), may be obstacles in the use of NKT cell-based cancer immunotherapy for advanced cancer patients. Here, we investigated the suppressive effects of Tregs on NKT cells and the underlying mechanisms with the aim to improve the antitumor activities of NKT cells. Methods: Peripheral blood samples were obtained from healthy donors, patients with benign tumors, and patients with head and neck squamous cell carcinoma (HNSCC). NKT cells, induced with α-galactosylceramide (α-GalCer), and monocyte-derived dendritic cells (DCs) were co-cultured with naïve CD4+ T cell-derived Tregs to investigate the mechanism of the Treg suppressive effect on NKT cell cytotoxic function. The functions and phenotypes of NKT cells were evaluated with flow cytometry and cytometric bead array. Results: Treg suppression on NKT cell function required cell-to-cell contact and was mediated via impaired DC maturation. NKT cells cultured under Treg-enriched conditions showed a decrease in CD4− NKT cell frequency, which exert strong tumoricidal responsiveness upon α-GalCer stimulation. The same results were observed in HNSCC patients with significantly increased effector Tregs. Conclusion: Tregs exert suppressive effects on NKT cell tumoricidal function by inducing more CD4− NKT cell anergy and less CD4+ NKT cell anergy. Both Treg depletion and NKT cell recovery from the anergy state may be important for improving the clinical efficacy of NKT cell-based immunotherapy in patients with advanced cancers. [ABSTRACT FROM AUTHOR]

Background: The severity of symptoms of pollen-induced allergic rhinitis is affected by the amount of scattered pollen. However, the relationships between the pollen dispersal pattern, symptom severity, and treatment efficacy are not clear. Methods: Between 2007 and 2012, we performed 4 randomized, placebo-controlled studies of sublingual immunotherapy (SLIT) on patients with Japanese cedar-induced allergic rhinitis who lived in or around Chiba, Japan. The participants were asked to avoid using rescue medicines during the cedar pollen season as much as possible and to record their nasal symptoms in allergy diaries. The amount of pollen dispersed daily was quantified using the Durham method, and the season was divided into early and late periods based on the pollen count. Results: A total of 721 patients were enrolled in the 4 studies during the 6-year study period. In the placebo group (n = 349), a correlation was observed between the amount of pollen dispersed and the severity of symptoms in the early but not late period of pollen dispersal. Treatment with SLIT (n = 372) significantly improved symptom severity in the late but not early period. Conclusion: For patients with Japanese cedar pollen-induced allergic rhinitis, the fluctuation of daily pollen dispersal had a minimal effect on the severity of symptoms during the late period. SLIT was remarkably effective in alleviating symptoms during this period but not in the early period. [ABSTRACT FROM AUTHOR]

Allergic rhinitis is a growing problem worldwide. Currently the only treatment that can modify the disease is antigen-specific immunotherapy, but its mechanism of action is not fully understood. We comprehensively investigated the role and changes of antigen-specific T cells before and after sublingual immunotherapy (SLIT) for Japanese cedar pollinosis. We cultured peripheral blood mononuclear cells obtained both before and 1 year after initiating SLIT and used a combination of single-cell RNA sequencing and repertoire sequencing. To investigate biomarkers, we used cells from patients participating a phase 2/3 trial of SLIT tablets for Japanese cedar pollinosis and cells from outpatients with good and poor response. Antigen-stimulated culturing after SLIT led to clonal expansion of T H 2 and regulatory T cells, and most of these CD4+ T cells retained their CDR3 regions before and after treatment, indicating antigen-specific clonal responses and differentiation resulting from SLIT. However, SLIT reduced the number of clonal functional T H 2 cells but increased the trans-type T H 2 cell population that expresses musculin (MSC), TGF-β , and IL-2. Trajectory analysis suggested that SLIT induced clonal differentiation of the trans-type T H 2 cells differentiated into regulatory T cells. Using real-time PCR, we found that the MSC levels increased in the active SLIT group and those with good response after 1 year of treatment. The combination of single-cell RNA sequencing and repertoire analysis helped reveal part of the underlying mechanism: SLIT promotes the expression of MSC on pathogenic T H 2 cells and suppresses their function. MSC may be a potential biomarker of SLIT for allergic rhinitis. [ABSTRACT FROM AUTHOR]

Background: The efficacy of prophylactic treatment before the start of pollen dispersal for prevention of aggravation of symptoms is unclear. The aim of the present study was to examine the efficacy of prophylactic treatment with an antihistamine for seasonal allergic rhinitis (SAR) using an environmental challenge chamber (ECC). Methods: The study was performed in a randomized double-blind manner with a 3-way crossover design. The subjects were 50 patients with SAR caused by Japanese cedar pollen who were randomized for treatment with levocetirizine hydrochloride 5 mg (Xyzal®) or placebo as follows: administration of placebo for 8 days (treatment A), single administration of levocetirizine on day 8 after placebo for 7 days (treatment B) or administration of levocetirizine for 8 days (treatment C). Efficacy in each treatment arm was evaluated based on cedar pollen exposure for 3 h on day 9 in an ECC, following 1-hour exposure on day 8. The primary endpoint was the total nasal symptom score for 12 h on day 9. Other nasal and ocular symptoms were secondary endpoints. Results: The evaluation was performed in 45 subjects. The total nasal symptom score on day 9 was significantly lower with treatment B compared with treatment A. Treatment C did not show superior efficacy compared with treatment B. Conclusions: Our results suggest that early intervention with levocetirizine soon after onset of symptoms may attenuate these symptoms as effectively as prophylactic treatment before pollen dispersal. These results are important from the perspective of patient convenience and reduction of medical costs. Copyright © 2013 S. Karger AG, Basel [ABSTRACT FROM AUTHOR]

The influence of tonsillectomy on allergic airway diseases is not well known. In the present study, the influence of tonsillectomy on perennial allergic rhinitis (PAR) and bronchial asthma (BA) among pediatric subjects was prospectively investigated. The tonsillectomy (surgery group) and the age-matched non-surgical subjects (control group) were examined and followed prospectively. In addition, immunological analysis was conducted. After in vitro allergen stimulation, the production of a small number of allergen-specific Th2 cells was induced in the tonsillar cells, even in sensitized subjects. Flow cytometry analysis detected more effector regulatory T cells (Tregs) in the tonsils than in peripheral blood. Clinically, after surgery, the PAR and BA symptoms improved in the surgery group but not in the control group. The total IgE in the surgery group was significantly lower than in the control group; after surgery, IgE levels slightly increased but remained lower. The postoperative Dermatophagoides farina (Der f)-specific IgE level increased in the sensitized subjects but not in the non-sensitized subjects. Tonsillectomy did not improve the underlying mechanisms of the allergy, however the decreased risk of infection and upper airway obstruction could lead to improved symptoms of allergic airway diseases. [ABSTRACT FROM AUTHOR]

Allergic diseases arise from a complex interplay between immune system and environmental factors. A link between the pathogenesis of allergic diseases and type 2 immune responses has become evident, with conventional and pathogenic type 2 helper T (Th2) cells involved in both. Recently, there has been a significant development in therapeutic agents for allergic diseases: IL-5 and IL-5 receptor antagonists, Janus kinase (JAK) inhibitors, and sublingual immunotherapy (SLIT). Mepolizumab, an IL-5, and Benralizumab, an IL-5 receptor antagonist, modulate eosinophilic inflammation mediated by IL-5-producing Th2 cells. Delgocitinib shows that JAK-associated signaling is essential for the inflammatory reaction in atopic dermatitis, one of the common allergic diseases. SLIT has a significant effect on allergic rhinitis by reducing pathogenic Th2 cell numbers. More recently, novel molecules that are involved in pathogenic Th2 cell-mediated allergic diseases have been identified. These include calcitonin gene-related peptide (CGRP), reactive oxygen species (ROS) scavenging machinery regulated by the Txnip-Nrf2-Blvrb axis, and myosin light chain 9 (Myl9), which interacts with CD69. This review provides an updated view of the recent research on treatment of allergic diseases and their cause: conventional and pathogenic Th2 cells. [ABSTRACT FROM AUTHOR]

Uncontrolled type 2 immunity by type 2 helper T (Th2) cells causes intractable allergic diseases; however, whether the interaction of CD4 + T cells shapes the pathophysiology of allergic diseases remains unclear. We identified a subset of Th2 cells that produced the serine proteases granzyme A and B early in differentiation. Granzymes cleave protease-activated receptor (Par)-1 and induce phosphorylation of p38 mitogen-activated protein kinase (MAPK), resulting in the enhanced production of IL-5 and IL-13 in both mouse and human Th2 cells. Ubiquitin-specific protease 7 (USP7) regulates IL-4-induced phosphorylation of STAT3, resulting in granzyme production during Th2 cell differentiation. Genetic deletion of Usp7 or Gzma and pharmacological blockade of granzyme B ameliorated allergic airway inflammation. Furthermore, PAR-1 + and granzyme + Th2 cells were colocalized in nasal polyps from patients with eosinophilic chronic rhinosinusitis. Thus, the USP7-STAT3-granzymes-Par-1 pathway is a potential therapeutic target for intractable allergic diseases., Competing Interests: Competing interests statement:The authors declare no competing interest.

Background: Allergic rhinitis is a growing problem worldwide. Currently the only treatment that can modify the disease is antigen-specific immunotherapy, but its mechanism of action is not fully understood., Objective: We comprehensively investigated the role and changes of antigen-specific T cells before and after sublingual immunotherapy (SLIT) for Japanese cedar pollinosis., Methods: We cultured peripheral blood mononuclear cells obtained both before and 1 year after initiating SLIT and used a combination of single-cell RNA sequencing and repertoire sequencing. To investigate biomarkers, we used cells from patients participating a phase 2/3 trial of SLIT tablets for Japanese cedar pollinosis and cells from outpatients with good and poor response., Results: Antigen-stimulated culturing after SLIT led to clonal expansion of T H 2 and regulatory T cells, and most of these CD4 + T cells retained their CDR3 regions before and after treatment, indicating antigen-specific clonal responses and differentiation resulting from SLIT. However, SLIT reduced the number of clonal functional T H 2 cells but increased the trans-type T H 2 cell population that expresses musculin (MSC), TGF-β, and IL-2. Trajectory analysis suggested that SLIT induced clonal differentiation of the trans-type T H 2 cells differentiated into regulatory T cells. Using real-time PCR, we found that the MSC levels increased in the active SLIT group and those with good response after 1 year of treatment., Conclusion: The combination of single-cell RNA sequencing and repertoire analysis helped reveal part of the underlying mechanism: SLIT promotes the expression of MSC on pathogenic T H 2 cells and suppresses their function. MSC may be a potential biomarker of SLIT for allergic rhinitis., (Copyright © 2022 The Authors. Published by Elsevier Inc. All rights reserved.)

Background: Although there are many asymptomatic patients, one of the problems of COVID-19 is early recognition of the disease. COVID-19 symptoms are polymorphic and may include upper respiratory symptoms. However, COVID-19 symptoms may be mistaken with the common cold or allergic rhinitis. An ARIA-EAACI study group attempted to differentiate upper respiratory symptoms between the three diseases., Methods: A modified Delphi process was used. The ARIA members who were seeing COVID-19 patients were asked to fill in a questionnaire on the upper airway symptoms of COVID-19, common cold and allergic rhinitis., Results: Among the 192 ARIA members who were invited to respond to the questionnaire, 89 responded and 87 questionnaires were analysed. The consensus was then reported. A two-way ANOVA revealed significant differences in the symptom intensity between the three diseases (p < .001)., Conclusions: This modified Delphi approach enabled the differentiation of upper respiratory symptoms between COVID-19, the common cold and allergic rhinitis. An electronic algorithm will be devised using the questionnaire., (© 2021 European Academy of Allergy and Clinical Immunology and John Wiley & Sons Ltd.)

An expert workshop in collaboration of the German Society of Allergy and Clinical Immunology (DGAKI) and the Japanese Society of Allergy (JSA) provided a platform for key opinion leaders of both countries aimed to join expertise and to highlight current developments and achievements in allergy research. Key domains of the meeting included the following seven main sections and related subchapters: 1) basic immunology, 2) bronchial asthma, 3) prevention of allergic diseases, 4) food allergy and anaphylaxis, 5) atopic dermatitis, 6) venom allergy, and 7) upper airway diseases. This report provides a summary of panel discussions of all seven domains and highlights unmet needs and project possibilities of enhanced collaborations of scientific projects., (© Dustri-Verlag Dr. K. Feistle.)

Digital anamorphosis is used to define a distorted image of health and care that may be viewed correctly using digital tools and strategies. MASK digital anamorphosis represents the process used by MASK to develop the digital transformation of health and care in rhinitis. It strengthens the ARIA change management strategy in the prevention and management of airway disease. The MASK strategy is based on validated digital tools. Using the MASK digital tool and the CARAT online enhanced clinical framework, solutions for practical steps of digital enhancement of care are proposed., (© 2020 EAACI and John Wiley and Sons A/S. Published by John Wiley and Sons Ltd.)

Allergen immunotherapy (AIT) is a proven therapeutic option for the treatment of allergic rhinitis and/or asthma. Many guidelines or national practice guidelines have been produced but the evidence-based method varies, many are complex and none propose care pathways. This paper reviews care pathways for AIT using strict criteria and provides simple recommendations that can be used by all stakeholders including healthcare professionals. The decision to prescribe AIT for the patient should be individualized and based on the relevance of the allergens, the persistence of symptoms despite appropriate medications according to guidelines as well as the availability of good-quality and efficacious extracts. Allergen extracts cannot be regarded as generics. Immunotherapy is selected by specialists for stratified patients. There are no currently available validated biomarkers that can predict AIT success. In adolescents and adults, AIT should be reserved for patients with moderate/severe rhinitis or for those with moderate asthma who, despite appropriate pharmacotherapy and adherence, continue to exhibit exacerbations that appear to be related to allergen exposure, except in some specific cases. Immunotherapy may be even more advantageous in patients with multimorbidity. In children, AIT may prevent asthma onset in patients with rhinitis. mHealth tools are promising for the stratification and follow-up of patients., (© 2019 EAACI and John Wiley and Sons A/S. Published by John Wiley and Sons Ltd.)

Competing Interests: Conflicts of Interest: Dr. Ansotegui reports personal fees from Mundipharma, Roxall, Sanofi, MSD, Faes Farma, Hikma, UCB, Astra Zeneca, outside the submitted work. Dr. Bachert reports personal fees from ALK, Stallergen, during the conduct of the study; personal fees from ALK, Stallergen, outside the submitted work. Dr. Bousquet reports personal fees from Chiesi, Cipla, Hikma, Menarini, Mundipharma, Mylan, Novartis, Purina, Sanofi-Aventis, Takeda, Teva, Uriach, other from KYomed-Innov, outside the submitted work. Dr. Calderon reports personal fees from ALK-Abello, ALK-US, Stallergenes Greer, HAL-Allergy, Allergopharma, ASIT-Biotech, outside the submitted work. Dr. Canonica reports grants from ALK ABELLO, Allergy Therapeutics, Anallergo, Hal Allergy, Stallergenes Greer, outside the submitted work. Dr. Cardona reports personal fees from ALK, Allergopharma, Allergy Therapeutics, Diater, LETI, Thermofisher, Stallergenes, outside the submitted work. Dr. Cecchi reports personal fees from Menarini, Malesci ALK, outside the submitted work. Dr. Cruz reports grants from National Institutes for Health Research (UK), National Institutes of Health (USA), grants and other from National Research Council (Brazil), other from Federal University of Bahia (Brazil), non-financial support from Fundacao ProAR, grants and personal fees from GSK, personal fees from AstraZeneca, Boehringer Ingelheim, CHIESI, Eurofarma, MEDA Pharma. Dr. Durham reports personal fees from Adiga, personal fees from ALK, personal fees from Allergopharma, MedicalUpdate GmBC, UCB, outside the submitted work. Dr. Ebisawa reports personal fees from Mylan, DBV Technologies, Thermofisher, outside the submitted work. Dr. Fokkens reports grants from Mylan, Allergy Therapeutics, GSK, ALK. Dr. Fonseca being a partner in a company developing mobile technologies for monitoring airways diseases. Dr. Klimek reports grants and personal fees from ALK Abelló, Denmark, grants and personal fees from Novartis, Switzerland, Allergopharma, Germany, Bionorica, Sweden, GSK, Great Britain, Lofarma, Italy, personal fees from MEDA, Sweden, Boehringer Ingelheim, Germany, grants from Biomay, Austria, grants from HAL, Netherlands, grants from LETI, Spain, Roxall, Germany, Bencard, Great Britain, outside the submitted work. Dr. Kuna reports personal fees from Adamed, AstraZeneca, Boehringer Ingelheim, Hal, Chiesi, Novartis, Berlin Chemie Menarini, outside the submitted work. Dr. Kvedariene reports personal fees from GSK, non-financial support from StallergenGreer, Mylan, AstraZeneca, Dimuna, Norameda, outside the submitted work. D Larenas Linnemann reports personal fees from GSK, Astrazeneca, MEDA, Boehringer Ingelheim, Novartis, Grunenthal, UCB, Amstrong, Siegfried, DBV Technologies, MSD, Pfizer. grants from Sanofi, Astrazeneca, Novartis, UCB, GSK, TEVA, Chiesi, Boehringer Ingelheim, outside the submitted work. Dr. MULLOL reports personal fees from SANOFI-GenzymeRegeneron, ALK-Abelló A/S, Menarini Group, MSD, GlaxoSmithKline, Novartis, GENENTECH-Roche, grants and personal fees from UCB Pharma, MYLAN-MEDA Pharma, URIACH Group, outside the submitted work. Y Okamoto reports personal fees from Shionogi Co. Ltd., Torii Co. Ltd., GSK, MSD, Kyowa Co. Ltd., from Eizai Co. Ltd., grants and personal fees from Kyorin Co. Ltd., Tiho Co. Ltd., grants from Yakuruto Co. Ltd., Yamada Bee Farm, outside the submitted work. N Papadopoulos reports personal fees from Novartis, Faes Farma, BIOMAY, HAL, Nutricia Research, Menarini, Novartis, MEDA, Abbvie, Novartis, MSD, Omega Pharma Danone, grants from Menarini outside the submitted work. O Pfaar reports grants and personal fees from ALK-Abelló, Allergopharma, Stallergenes Greer, HAL Allergy Holding B.V./HAL Allergie GmbH, Bencard Allergie GmbH/Allergy Therapeutics, Lofarma, Biotech Tools S.A, LETI/LETI Pharma, Anergis S.A. grants from Biomay, Nuvo, Circassia, Glaxo Smith Kline, personal fees from Novartis Pharma, MEDA Pharma, Mobile Chamber Experts (a GA2LEN Partner), Pohl-Boskamp, Indoor Biotechnologies, grants from, outside the submitted work. Dr. Samolinski reports non-financial support from Mylan, during the conduct of the study. Dr. Shamji reports grants and personal fees from ALK, ASIT Biotech, sa, Allergopharma, grants from Regeneron, Merck, Immune Tolerance Network, outside the submitted work. Dr. Tsiligianni reports personal fees from Novartis, GSK, Boehringer Ingelheim, Astra Zeneca, grants from GSK Hellas, outside the submitted work. Dr. Wallace is co-chair of the Joint Task Force on Practice Parameters of the AAAAI/ACAAI. However, it does not feel that this causes any conflict of interest in the writing/review of the document. Zuberbier reports fees from Bayer Health Care, FAES, Novartis, Henkel, Astra Zeneca, AbbVie, ALK, Almirrall, Astellas, Bayer Health Care, Bencard, Berlin Chemie, HAL, Leti, Meda, Menarini, Merck, MSD, Pfizer, Sanofi, Stallergenes, Takeda, Teva, UCB, Henkel, Kryolan, l’Oreal; Commitee member: WHO-Initiative “Allergic Rhinitis and Its Impact on Asthma” (ARIA). Member of the Board: German Society for Allergy and Clinical Immunology (DGAKI). Head: European Centre for Allergy Research Foundation (ECARF). Secretary General: Global Allergy and Asthma European Network (GA2LEN). Member: Committee on Allergy Diagnosis and Molecular Allergology, World Allergy Organization (WAO). The other authors have no conflicts of interest to declare.

Competing Interests: Conflicts of Interest: Dr. Ansotegui reports personal fees from Mundipharma, Roxall, Sanofi, MSD, Faes Farma, Hikma, UCB, Astra Zeneca, outside the submitted work. Dr. Bachert reports personal fees from ALK, Stallergen, during the conduct of the study; personal fees from ALK, Stallergen, outside the submitted work. Dr. Bousquet reports personal fees from Chiesi, Cipla, Hikma, Menarini, Mundipharma, Mylan, Novartis, Purina, Sanofi-Aventis, Takeda, Teva, Uriach, other from KYomed-Innov, outside the submitted work. Dr. Calderon reports personal fees from ALK-Abello, ALK-US, Stallergenes Greer, HAL-Allergy, Allergopharma, ASIT-Biotech, outside the submitted work. Dr. Canonica reports grants from ALK ABELLO, Allergy Therapeutics, Anallergo, Hal Allergy, Stallergenes Greer, outside the submitted work. Dr. Cardona reports personal fees from ALK, Allergopharma, Allergy Therapeutics, Diater, LETI, Thermofisher, Stallergenes, outside the submitted work. Dr. Cecchi reports personal fees from Menarini, Malesci ALK, outside the submitted work. Dr. Cruz reports grants from National Institutes for Health Research (UK), National Institutes of Health (USA), grants and other from National Research Council (Brazil), other from Federal University of Bahia (Brazil), non-financial support from Fundacao ProAR, grants and personal fees from GSK, personal fees from AstraZeneca, Boehringer Ingelheim, CHIESI, Eurofarma, MEDA Pharma. Dr. Durham reports personal fees from Adiga, personal fees from ALK, personal fees from Allergopharma, MedicalUpdate GmBC, UCB, outside the submitted work. Dr. Ebisawa reports personal fees from Mylan, DBV Technologies, Thermofisher, outside the submitted work. Dr. Fokkens reports grants from Mylan, Allergy Therapeutics, GSK, ALK. Dr. Fonseca being a partner in a company developing mobile technologies for monitoring airways diseases. Dr. Klimek reports grants and personal fees from ALK Abelló, Denmark, grants and personal fees from Novartis, Switzerland, Allergopharma, Germany, Bionorica, Sweden, GSK, Great Britain, Lofarma, Italy, personal fees from MEDA, Sweden, Boehringer Ingelheim, Germany, grants from Biomay, Austria, grants from HAL, Netherlands, grants from LETI, Spain, Roxall, Germany, Bencard, Great Britain, outside the submitted work. Dr. Kuna reports personal fees from Adamed, AstraZeneca, Boehringer Ingelheim, Hal, Chiesi, Novartis, Berlin Chemie Menarini, outside the submitted work. Dr. Kvedariene reports personal fees from GSK, non-financial support from StallergenGreer, Mylan, AstraZeneca, Dimuna, Norameda, outside the submitted work. D Larenas Linnemann reports personal fees from GSK, Astrazeneca, MEDA, Boehringer Ingelheim, Novartis, Grunenthal, UCB, Amstrong, Siegfried, DBV Technologies, MSD, Pfizer. grants from Sanofi, Astrazeneca, Novartis, UCB, GSK, TEVA, Chiesi, Boehringer Ingelheim, outside the submitted work. Dr. MULLOL reports personal fees from SANOFI-Genzyme-Regeneron, ALK-Abelló A/S, Menarini Group, MSD, GlaxoSmithKline, Novartis, GENENTECH-Roche, grants and personal fees from UCB Pharma, MYLAN-MEDA Pharma, URIACH Group, outside the submitted work. Y Okamoto reports personal fees from Shionogi Co. Ltd., Torii Co. Ltd., GSK, MSD, Kyowa Co. Ltd., from Eizai Co. Ltd., grants and personal fees from Kyorin Co. Ltd., Tiho Co. Ltd., grants from Yakuruto Co. Ltd., Yamada Bee Farm, outside the submitted work. N Papadopoulos reports personal fees from Novartis, Faes Farma, BIOMAY, HAL, Nutricia Research, Menarini, Novartis, MEDA, Abbvie, Novartis, MSD, Omega Pharma Danone, grants from Menarini outside the submitted work. O Pfaar reports grants and personal fees from ALK-Abelló, Allergopharma, Stallergenes Greer, HAL Allergy Holding B.V./HAL Allergie GmbH, Bencard Allergie GmbH/Allergy Therapeutics, Lofarma, Biotech Tools S.A, LETI/LETI Pharma, Anergis S.A. grants from Biomay, Nuvo, Circassia, Glaxo Smith Kline, personal fees from Novartis Pharma, MEDA Pharma, Mobile Chamber Experts (a GA2LEN Partner), Pohl-Boskamp, Indoor Biotechnologies, grants from, outside the submitted work. Dr. Samolinski reports non-financial support from Mylan, during the conduct of the study. Dr. Shamji reports grants and personal fees from ALK, ASIT Biotech, sa, Allergopharma, grants from Regeneron, Merck, Immune Tolerance Network, outside the submitted work. Dr. Tsiligianni reports personal fees from Novartis, GSK, Boehringer Ingelheim, Astra Zeneca, grants from GSK Hellas, outside the submitted work. Dr. Wallace is co-chair of the Joint Task Force on Practice Parameters of the AAAAI/ACAAI. However, it does not feel that this causes any conflict of interest in the writing/review of the document. Zuberbier reports fees from Bayer Health Care, FAES, Novartis, Henkel, Astra Zeneca, AbbVie, ALK, Almirrall, Astellas, Bayer Health Care, Bencard, Berlin Chemie, HAL, Leti, Meda, Menarini, Merck, MSD, Pfizer, Sanofi, Stallergenes, Takeda, Teva, UCB, Henkel, Kryolan, l’Oreal; Commitee member: WHO-Initiative “Allergic Rhinitis and Its Impact on Asthma” (ARIA). Member of the Board: German Society for Allergy and Clinical Immunology (DGAKI). Head: European Centre for Allergy Research Foundation (ECARF). Secretary General: Global Allergy and Asthma European Network (GA2LEN). Member: Committee on Allergy Diagnosis and Molecular Allergology, World Allergy Organization (WAO). The other authors have no conflicts of interest to declare.

Recent decades have witnessed a rapid worldwide increase in chronic inflammatory disorders such as asthma. CD4 + T helper 2 cells play critical roles in the pathogenesis of allergic airway inflammation, and CD69 expression on activated CD4 T cells is required to induce allergic inflammation in tissues. However, how CD69 mechanistically controls allergic inflammation remains poorly defined. In lymphoid tissues, CD69 regulates cellular retention through inhibition of S1P1 expression and requires no specific ligands to function. In contrast, we show herein that myosin light chain (Myl) 9 and Myl12 are new functional ligands for CD69. Blockade of CD69-Myl9/12 interaction ameliorates allergic airway inflammation in ovalbumin-induced and house dust mite-induced mouse models of asthma. Within the inflamed mouse airways, we found that the expression of Myl9/12 was increased and that platelet-derived Myl9/12 localized to the luminal surface of blood vessels and formed intravascular net-like structures. Analysis of nasal polyps of eosinophilic chronic rhinosinusitis patients revealed that Myl9/12 expression was increased in inflammatory lesions and was distributed within net-like structures in the intravascular space. In addition, we detected Myl9/12 in perivascular spaces where many CD69 + cells were positioned within Myl9/12 structures. Thus, CD69-Myl9/12 interaction is a key event in the recruitment of activated CD69 + T cells to inflamed tissues and could be a therapeutic target for intractable airway inflammatory diseases., (Copyright © 2016, American Association for the Advancement of Science.)