Symptom flares of atopic dermatitis during the Japanese cedar pollen season – a Website questionnaire study

2010 ◽  
Vol 20 (4) ◽  
pp. 537-538 ◽  
Author(s):  
Haruko Nishie ◽  
Mariko Kato ◽  
Masutaka Furue
Keyword(s):  
Atopic Dermatitis ◽  
Pollen Season ◽  
Japanese Cedar ◽  
Questionnaire Study ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen

scholarly journals Changes of Micro-RNAs in Asymptomatic Subjects Sensitized to Japanese Cedar Pollen after Prophylactic Sublingual Immunotherapy

2015 ◽  
Vol 6 (1) ◽  
pp. ar.2015.6.0107 ◽  
Author(s):  
Bo Hou ◽  
Mariko Murata ◽  
Ahmad Shah Said ◽  
Hiroshi Sakaida ◽  
Sawako Masuda ◽  
...  
Keyword(s):  
Placebo Group ◽  
Pollen Season ◽  
Sublingual Immunotherapy ◽  
Quantitative Polymerase Chain Reaction ◽  
Japanese Cedar ◽  
Pollen Extract ◽  
Micro Rnas ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen ◽  
Asymptomatic Subjects

Japanese cedar pollinosis is the predominant seasonal allergic rhinitis in Japan, and it has increased in prevalence during the past 10 years. Sublingual immunotherapy (SLIT) is considered a safe and effective treatment for pollinosis. Micro-RNAs (miRNAs) are a class of short single-stranded RNA molecules that posttranscriptionally silence gene expression and may mediate allergic immune responses. The aim of this study was to investigate the miRNA alteration in asymptomatic subjects sensitized to Japanese cedar pollen under prophylactic SLIT under part of a randomized, double-blind, placebo-controlled, multiple-center trial. Analysis was undertaken in 15 asymptomatic subjects sensitized to Japanese cedar pollen–specific IgE (ImmunoCAP class ≥2) who participated in 2013. The SLIT group (n = 6) received standardized Japanese cedar pollen extract and the placebo group (n = 9) received an inactive placebo for 5 months covering the cedar pollen season. Changes in serum miRNAs were measured by real-time quantitative polymerase chain reaction to determine whether SLIT had effects on profiles of circulating miRNA. Seven subjects in the placebo group developed pollinosis symptoms, whereas no subjects in the SLIT group did (p = 0.007). Serum hsa-miR-223 was significantly up-regulated in postseason compared with preseason samples. The hsa-let-7b was significantly more down-regulated in postseason than in preseason samples from the placebo group; however, no significant differences were observed in those from the SLIT group. A significant decrease in circulating let-7b was also observed in the subjects who developed symptoms. Prophylactic SLIT was effective in preventing the development of pollinosis. Alterations in miRNA expression occurred in asymptomatic, sensitized subjects during cedar pollen season.

Changes in Plasma TARC Levels during Japanese Cedar Pollen Season and Relationships with Symptom Development

2007 ◽  
Vol 144 (2) ◽  
pp. 123-127 ◽  
Author(s):  
Jin-zhong Xiao ◽  
Shizuki Kondo ◽  
Noritoshi Takahashi ◽  
Toshitaka Odamaki ◽  
Noriyuki Iwabuchi ◽  
...  
Keyword(s):  
Pollen Season ◽  
Japanese Cedar ◽  
Symptom Development ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen

Japanese Cedar Pollen–Specific IgA in Nasal Secretions and Nasal Allergy Symptoms

2019 ◽  
Vol 128 (4) ◽  
pp. 330-337
Author(s):  
Motohiko Suzuki ◽  
Makoto Yokota ◽  
Shinya Ozaki ◽  
Tamami Matsumoto ◽  
Yoshihisa Nakamura
Keyword(s):  
Pollen Season ◽  
Japanese Cedar ◽  
Specific Ige ◽  
Nasal Allergy ◽  
Serum Samples ◽  
Protein Levels ◽  
Carbon Coated ◽  
Nasal Secretions ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen

Objective: IgA-dependent degranulation of eosinophils and positive correlation between IgA and eosinophil cytotoxic protein levels in nasal secretions have been reported. However, the association between IgA and allergic reactions remains unclear. Therefore, we evaluated the changes in Japanese cedar–specific IgA levels and allergy symptoms after Japanese cedar pollen scattering in symptomatic and asymptomatic individuals sensitized to Japanese cedar pollen. Methods: Nasal secretion and serum samples were collected from 31 participants (21 symptomatic and 10 asymptomatic participants) in January (preseason) and March (peak season). Japanese cedar–specific IgA or IgE levels were measured using ELISA with diamond-like carbon-coated chips. Results: The ratio of Japanese cedar pollen–specific IgA to total IgA (rIgA) in the nasal secretions of symptomatic participants increased significantly in March compared with that in January ( P < .01); however, the ratio of specific IgE to total IgE (rIgE) in nasal secretions did not. rIgA in nasal secretions among asymptomatic participants also did not increase during pollen season. rIgA in nasal secretions was significantly correlated with nasal allergic symptoms (r = 0.82; P < .0001) with no significant correlation between rIgE and symptoms. Conclusions: To our knowledge, this is the first study to show an association between nasal symptoms and rIgA in nasal secretions, suggesting that rIgA is useful as an antigen-specific biomarker for allergic rhinitis or pollinosis. Furthermore, rIgA values in nasal secretions do not increase in asymptomatic participants sensitized to Japanese cedar during the pollen season.

scholarly journals Clinical Efficacy of Sublingual Immunotherapy with Japanese Cedar Pollen During the Cypress Pollen Season

2017 ◽  
Vol 120 (6) ◽  
pp. 833-840 ◽  
Author(s):  
Atsushi Yuta ◽  
Yukiko Ogawa ◽  
Hitomi Ogihara ◽  
Yusuke Suzuki ◽  
Nobuo Ohta ◽  
...  
Keyword(s):  
Clinical Efficacy ◽  
Pollen Season ◽  
Sublingual Immunotherapy ◽  
Japanese Cedar ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen

scholarly journals Possibility of Japanese Cedar Pollen Causing False Positives in the Deep Mycosis Test

2021 ◽  
Vol 22 (4) ◽  
pp. 2135
Author(s):  
Takashi Kanno ◽  
Changmin Kim ◽  
Daisuke Yamanaka ◽  
Ken-ichi Ishibashi ◽  
Hiroshi Tanaka ◽  
...  
Keyword(s):  
Quantitative Methods ◽  
Japanese Cedar ◽  
False Positives ◽  
Affinity Column ◽  
Deep Mycosis ◽  
Specific Affinity ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen ◽  
Positive Factor ◽  
Lal Assay

Because Japanese cedar pollen (JCP) contains beta-1,3-d-glucan (BG), there is concern that its lingering presence in the atmosphere, especially during its scattering period, may cause false positives in the factor-G-based Limulus amebocyte lysate (LAL) assay used to test for deep mycosis (i.e., G-test). Hence, we examined whether the LAL assay would react positively with substances contained in JCP by using the G-test to measure JCP particles and extracts. BG was purified from the JCP extract on a BG-specific affinity column, and the percentage extractability was measured using three different BG-specific quantitative methods. The G-test detected 0.4 pg BG in a single JCP particle and 10 fg from a single particle in the extract. The percentage extractability of JCP-derived BG was not significantly different among the three quantitative methods. As the JCP particles should technically have been removed during serum separation, they should be less likely to be a direct false-positive factor. However, given that the LAL-assay-positive substances in the JCP extract were not distinguishable by the three BG-specific quantitative methods, we conclude that they may cause the background to rise. Therefore, in Japan false positives arising from JCP contamination should be considered when testing patients for deep mycosis.

Regulation of the Expression of SARS-CoV-2 Receptor Angiotensin-Converting Enzyme 2 in Nasal Mucosa

2021 ◽  
pp. 194589242110277
Author(s):  
Tetsuji Takabayashi ◽  
Kanako Yoshida ◽  
Yoshimasa Imoto ◽  
Robert P. Schleimer ◽  
Shigeharu Fujieda
Keyword(s):  
Epithelial Cells ◽  
Angiotensin Converting Enzyme ◽  
Nasal Mucosa ◽  
Japanese Cedar ◽  
Airway Epithelial Cells ◽  
Airway Epithelial ◽  
Converting Enzyme ◽  
Angiotensin Converting Enzyme 2 ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen

Background Coronavirus disease 2019 (COVID-19) has caused a global pandemic. Higher expression of the virus receptor angiotensin-converting enzyme 2 (ACE2) in the nasal mucosa may be associated with high transmissibility and asymptomatic infection. In COVID-19, the elucidation of the determinants of ACE2 expression at nasal tissue level is crucial. The development of strategies to downregulate ACE2 expression in nasal epithelial cells might reduce transmission and be useful as a novel therapeutic approach. Objective To verify ACE2 expression in the nasal mucosa of patients with seasonal allergic rhinitis induced by Japanese cedar pollen (SAR-JCP) and chronic rhinosinusitis with nasal polyp (CRSwNP) and to examine the effects of short-chain fatty acids (SCFAs) on ACE2 expression in airway epithelial cells. Methods We assessed ACE2 expression in the nasal mucosa of control subjects, patients with SAR-JCP, and those with CRSwNP using real-time polymerase chain reaction. We also quantified ACE2 gene expression in cultured airway epithelial cells. Results Although ACE2 expression was greatly increased in a few patients with SAR-JCP during the Japanese cedar pollen season, mean levels were not significantly increased. ACE2 mRNA expression was significantly decreased in nasal polyp tissue from patients with chronic rhinosinusitis compared with the expression in that from control subjects. SCFAs generated by gastrointestinal microbiota significantly reduced resting ACE2 expression in cultured airway epithelial cells. SCFAs also significantly suppressed the dsRNA-dependent upregulation of ACE2 expression in airway epithelial cells. Conclusion Inflammatory endotype affects ACE2 expression in the nasal mucosa and influences susceptibility to severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) infection. In particular, type 2 inflammation could downregulate ACE2 expression in the nasal mucosa and reduces susceptibility to SARS-CoV-2 in patients with CRSwNP. Although in vivo experiments are required, administration of SCFAs to the nasal cavity might be worthy of consideration as a preventative or therapeutic strategy for the early-stage COVID-19.

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