scholarly journals Climate Change Influences the Japanese Cedar (Cryptomeria japonica) Pollen Count and Sensitization Rate in South Korea

2018 ◽  
Author(s):  
Jung-Kook Song ◽  
Ju wan Kang ◽  
Sung-Chul Hong ◽  
Jeong Hong Kim ◽  
Dahee Park ◽  
...  
Keyword(s):  
Climate Change ◽  
South Korea ◽  
Global Climate ◽  
Japanese Cedar ◽  
Common Disease ◽  
Temperature Dependent ◽  
Sensitization Rate ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen ◽  
Increasing Temperature

AbstractBackgroundJapanese cedar pollen (JCP) is the major outdoor allergen for spring pollinosis and seasonal allergic rhinitis (SAR) caused by JCP is the most common disease in Jeju Island, South Korea and in Japan. Prior to our research, JCP counts were strongly temperature dependent and were significantly associated with the JCP sensitization rate and JC pollinosis. This event may still be ongoing due to the effects of global climate change, such as increasing temperature.Methods and FindingFor these reasons, we are studying the correlation among increasing temperatures, the JCP counts in the atmosphere and the JCP sensitization rate.ConclusionsIn this study, our data show that increasing temperatures in January and April might lead to earlier and longer JCP seasons and that earlier and longer JCP seasons lead to an increase in the JCP sensitization rate, which influences the prevalence of JC pollinosis.

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.

Specific IgE and IgG4 antibodies to Japanese cedar pollen and total IgE antibody in lumbermen

Aerobiologia ◽  
1998 ◽  
Vol 14 (4) ◽  
pp. 321-324 ◽  
Author(s):  
Kensei Naito ◽  
G. Ishii ◽  
T. Ogawa ◽  
N. Yokoyama ◽  
S. Iwata
Keyword(s):  
Japanese Cedar ◽  
Specific Ige ◽  
Total Ige ◽  
Ige Antibody ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen

Thl/Th2 response profiles to the major allergens Cry j 1 and Cry j 2 of Japanese cedar pollen

Allergy ◽  
1996 ◽  
Vol 51 (10) ◽  
pp. 732-740 ◽  
Author(s):  
K. Sugimura ◽  
S. Hashiguchi ◽  
Y. Takahashi ◽  
K. Hino ◽  
Y. Taniguchi ◽  
...  
Keyword(s):  
Japanese Cedar ◽  
Th2 Response ◽  
Response Profiles ◽  
Japanese Cedar Pollen ◽  
Major Allergens ◽  
Cedar Pollen ◽  
Cry J 2

Preclinical evaluation of an immunotherapeutic peptide comprising 7 T-cell determinants of Cry j 1 and Cry j 2, the major Japanese cedar pollen allergens

2001 ◽  
Vol 108 (1) ◽  
pp. 94-100 ◽  
Author(s):  
Kazuki Hirahara ◽  
Toru Tatsuta ◽  
Toshiro Takatori ◽  
Masahiko Ohtsuki ◽  
Hideyo Kirinaka ◽  
...  
Keyword(s):  
T Cell ◽  
Japanese Cedar ◽  
Pollen Allergens ◽  
Preclinical Evaluation ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen ◽  
Cry J 2

scholarly journals Epitope specificity of IgE antibodies to a major allergen (Cry j 1) of Japanese cedar pollen in sera of humans and monkeys with pollinosis

Immunology ◽  
1997 ◽  
Vol 91 (2) ◽  
pp. 161-166 ◽  
Author(s):  
M. SAKAGUCHI ◽  
M. HASHIMOTO ◽  
H. NIGI ◽  
H. YASUEDA ◽  
Y. TAKAHASHI ◽  
...  
Keyword(s):  
Japanese Cedar ◽  
Major Allergen ◽  
Ige Antibodies ◽  
Epitope Specificity ◽  
Japanese Cedar Pollen ◽  
Cedar Pollen
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