Combined evaluation of FeNO and b-EOS can identify patients with frequent exacerbations and stratify the appropriate therapy for type 2 inflammation-predominant severe asthma.

No abstract

11525 Background: Antibody blockade of programmed death 1 (PD-1), has led to durable responses and significant prolongation of overall survival in metastatic cancers including non-small cell lung cancer (NSCLC). However, in clinical trials, response rates were as low as 20 %, and approximately 50 % of the patients did not achieve benefits to prolong progression free survival. These results bring us a hypothesis that there are subgroups with distinct pre-existing anti-tumor immunity resulting in different responses to anti-PD-1 therapy. We reported that effector T cells, which are capable of mediating antitumor reactivity, are primed in LNs draining growing tumors and that these T cells exclusively belong to the T cells that down-regulated CD62L (CD62Llow) subpopulation. In the absence of purified tumor antigenic proteins or peptides on many tumors, the expression of the homing molecule CD62L on T cells may serve as a surrogate marker for identifying tumor-specific immune cells. Methods: We analyzed the peripheral blood mononuclear cells (PBMC) of 50 consecutive NSCLC patients who were planned to be treated with anti-PD-1 Ab, Nivolumab after obtaining written informed consent. The patients received Nivolumab at a dose of 3 mg per kilogram of body weight every 2 weeks. Tumor response was assessed with the use of the Response Evaluation Criteria in Solid Tumors (RECIST), version 1.1, at week 8 and every 8 weeks thereafter. Results: The NSCLC patients who achieved partial response (PR) or stable disease (SD) had significantly (p = 4.1x10-7) more CD62Llow CD4+ T cells in PBMC than progressive disease (PD) patients. The percentages of CD62Llow in CD4+ T cells provided sensitivity 92.9 %, and specificity 96.7 % to predict the patients who had PD. Moreover, SD patients had significantly (p = 0.0067) less regulatory T cell subpopulation than PR patients, thus, it was possible to predict PR from SD. Conclusions: These results show that the major differences in pre-existing immunity among PR, SD, and PD patients to anti-PD-1 Ab existed in CD4+ T cell balance between primed effector and regulatory T cells. Further characterization of CD62Llow CD4+ T cells including mRNA microarray, checkpoint molecules, and chemokine receptors is going on.

Table of ContentsA1 Pirfenidone inhibits TGF-b1-induced extracellular matrix production in nasal polyp-derived fibroblastsJae-Min Shin, Heung-Man Lee, Il-Ho ParkA2 The efficacy of a 2-week course of oral steroid in the treatment of chronic spontaneous urticaria refractory to antihistaminesHyun-Sun Yoon, Gyeong Yul ParkA3 The altered distribution of follicular t helper cells may predict a more pronounced clinical course of primary sjögren’s syndromeMargit ZeherA4 Betamethasone suppresses Th2 cell development induced by langerhans cell like dendritic cellsKatsuhiko Matsui, Saki Tamai, Reiko IkedaA5 An evaluation of variousallergens in cases of allergic bronchial asthma at lucknow and neighbouring districts by intradermal skintestDrsushil Suri, Dranu SuriA6 Evaluation ferqency of ADHD in childhood asthmaMarzieh Heidarzadeh AraniA7 Steven johnson syndrome caused by typhoid fever in a childAzwin Lubis, Anang EndaryantoA8 Chronic Bronchitis with Radio Contrast Media Hypersensitivity: A Case with Hypothesized GINA Step 1 AsthmaShinichiro KogaA9 The association between asthma and depression in Korean adult : An analysis of the fifth korea national health and nutrition examination survey (2010-2012)Lee Ju SukA10 Management of allergic disease exacerbations in pregnancyYasunobu TsuzukiA11 Subcutaneous immunotherapy mouse model for atopic dermatitisSeo Hyeong Kim, Jung U Shin, Ji Yeon Noh, Shan Jin, Shan Jin, Hemin Lee, Jungsoo Lee, Chang Ook Park, Kwang Hoon Lee, Kwang Hoon LeeA12 Atopic disease and/or atopy are risk factors for local anesthetic allergy in patients with history of hypersensitivity reactions to drugs?Fatma Merve TepetamA13 Food hypersensitivity in patients with atopic dermatitis in KoreaChun Wook Park, Jee Hee Son, Soo Ick Cho, Yong Se Cho, Yun Sun Byun, Yoon Seok Yang, Bo Young Chung, Hye One Kim, Hee Jin ChoA14 Anaphylaxis caused by an ant (Brachyponera chinensis) in JapanYoshinori Katada, Toshio Tanaka, Akihiko Nakabayashi, Koji Nishida, Kenichi Aoyagi, Yuki Tsukamoto, Kazushi Konma, Motoo Matsuura, Jung-Won Park, Yoshinori Harada, Kyoung Yong Jeong, Akiko Yura, Maiko YoshimuraA15 Anti-allergic effect of anti-IL-33 by suppression of immunoglobulin light chain and inducible nitric oxide synthaseTae-Suk Kyung, Young Hyo Kim, Chang-Shin Park, Tae Young Jang, Min-Jeong Heo, Ah-Yeoun Jung, Seung-Chan YangA16 Food hypersensitivity in patients with chronic urticaria in KoreaHye One Kim, Yong Se Cho, Yun Sun Byun, Yoon Seok Yang, Bo Young Chung, Jee Hee Son, Chun Wook Park, Hee Jin ChoA17 Dose optimizing study of a depigmented polymerized allergen extract of phleum pollen by means of conjunctival provocation test (CPT)Angelika Sager, Oliver PfaarA18 Correlation of cutaneous sensitivity and cytokine response in children with asthmaAmit Agarwal, Meenu Singh, Bishnupda Chatterjee, Anil ChauhanA19 Colabomycin E, a Streptomycete-Derived Secondary Metabolite, Inhibits Proinflammatory Cytokines in Human Monocytes/MacrophagesIlja Striz, Eva Cecrdlova, Katerina Petrickova, Libor Kolesar, Alena Sekerkova, Veronika Svachov...

Background Symptoms of rhinitis and asthma can be exacerbated during Japanese cedar pollen (JCP)-scattering season, even in subjects who are not sensitized to JCP, suggesting that innate immune responses may contribute to this process. We previously reported that house dust mite directly activates the effector functions of eosinophils. Similar mechanisms may play roles in the JCP-related aggravation of allergic diseases. Objective To investigate whether JCP or Cry j 1, a major allergen of JCP, can modify the effector functions of eosinophils. Methods Eosinophils isolated from the peripheral blood of healthy donors were stimulated with either JCP or Cry j 1, and their adhesion to human intercellular adhesion molecule-1 was measured using eosinophil peroxidase assays. The generation of eosinophil superoxide anion (O 2 − ) was measured based on the superoxide dismutase-inhibitable reduction of cytochrome C. Concentrations of eosinophil-derived neurotoxin in the cell media were measured by enzyme-linked immunosorbent assay as a marker of degranulation. Results Both JCP and Cry j 1 directly induced eosinophil adhesiveness, generation of O 2 − , and release of eosinophil-derived neurotoxin. Both anti-αM and anti-β2 integrin antibodies blocked all of these eosinophil functions induced by JCP and Cry j 1. Similarly, PAR-2 antagonists also partially suppressed all of these effector functions induced by JCP and Cry j 1. Conclusion JCP and Cry j 1 directly activate the functions of eosinophils, and both αMβ2 integrin and partly PAR-2 are contributed to this activation. Therefore, JCP-induced eosinophil activation may play a role in the aggravation of allergic airway diseases in nonsensitized patients as well as in JCP-sensitized patients.