A novel assay for improved detection of sputum periostin in patients with asthma.
<h4>Background</h4>Serum periostin associates with type-2 inflammation in asthmatic airways, but also reflects whole body periostin levels originating from multiple sources. Less is known about sputum periostin as a biomarker in asthma as detection levels are low using currently availabl...
| Main Authors: | , , , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
Public Library of Science (PLoS)
2023-01-01
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| Series: | PLoS ONE |
| Online Access: | https://doi.org/10.1371/journal.pone.0281356 |
| _version_ | 1797904223093915648 |
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| author | Junya Ono Masayuki Takai Ayami Kamei Shoichiro Ohta Parameswaran Nair Kenji Izuhara Sven-Erik Dahlén Anna James BIOAIR consortium |
| author_facet | Junya Ono Masayuki Takai Ayami Kamei Shoichiro Ohta Parameswaran Nair Kenji Izuhara Sven-Erik Dahlén Anna James BIOAIR consortium |
| author_sort | Junya Ono |
| collection | DOAJ |
| description | <h4>Background</h4>Serum periostin associates with type-2 inflammation in asthmatic airways, but also reflects whole body periostin levels originating from multiple sources. Less is known about sputum periostin as a biomarker in asthma as detection levels are low using currently available periostin assays. We aimed to investigate detection of sputum periostin using ELISA assays targeting different periostin epitopes and relate levels to clinical characteristics.<h4>Methods</h4>Two ELISA systems were developed using antibodies detecting whole periostin or cleavage products, the molecular weight and amino acid sequences of which were confirmed. The ELISA assays were applied to sputum from 80 patients with mild-to-moderate and severe asthma enrolled in the European, multi-center study BIOAIR. Results were related to clinical characteristics.<h4>Results</h4>Sputum was found to contain smaller periostin fragments, possibly due to proteolytic cleavage at a C-terminal site. Comparing ELISA methodology using antibodies against cleaved versus whole periostin revealed detectable levels in 90% versus 44% of sputum samples respectively. Sputum periostin showed associations with blood and sputum eosinophils. Furthermore, sputum, but not serum, periostin correlated with reduced lung function and sputum IL-13 and was reduced by oral corticosteroid treatment.<h4>Conclusions</h4>We present an ELISA method for improved analysis of sputum periostin by detecting cleavage products of the periostin protein. Using this assay, sputum periostin was detectable and associated with more disease-relevant parameters in asthma than serum periostin. Sputum periostin is worth considering as a phenotype-specific biomarker in asthma as its proximity to the airways may eliminate some of the confounding factors known to affect serum periostin. |
| first_indexed | 2024-04-10T09:45:25Z |
| format | Article |
| id | doaj.art-73e5495b5d73470397acc18523927def |
| institution | Directory Open Access Journal |
| issn | 1932-6203 |
| language | English |
| last_indexed | 2024-04-10T09:45:25Z |
| publishDate | 2023-01-01 |
| publisher | Public Library of Science (PLoS) |
| record_format | Article |
| series | PLoS ONE |
| spelling | doaj.art-73e5495b5d73470397acc18523927def2023-02-17T05:32:21ZengPublic Library of Science (PLoS)PLoS ONE1932-62032023-01-01182e028135610.1371/journal.pone.0281356A novel assay for improved detection of sputum periostin in patients with asthma.Junya OnoMasayuki TakaiAyami KameiShoichiro OhtaParameswaran NairKenji IzuharaSven-Erik DahlénAnna JamesBIOAIR consortium<h4>Background</h4>Serum periostin associates with type-2 inflammation in asthmatic airways, but also reflects whole body periostin levels originating from multiple sources. Less is known about sputum periostin as a biomarker in asthma as detection levels are low using currently available periostin assays. We aimed to investigate detection of sputum periostin using ELISA assays targeting different periostin epitopes and relate levels to clinical characteristics.<h4>Methods</h4>Two ELISA systems were developed using antibodies detecting whole periostin or cleavage products, the molecular weight and amino acid sequences of which were confirmed. The ELISA assays were applied to sputum from 80 patients with mild-to-moderate and severe asthma enrolled in the European, multi-center study BIOAIR. Results were related to clinical characteristics.<h4>Results</h4>Sputum was found to contain smaller periostin fragments, possibly due to proteolytic cleavage at a C-terminal site. Comparing ELISA methodology using antibodies against cleaved versus whole periostin revealed detectable levels in 90% versus 44% of sputum samples respectively. Sputum periostin showed associations with blood and sputum eosinophils. Furthermore, sputum, but not serum, periostin correlated with reduced lung function and sputum IL-13 and was reduced by oral corticosteroid treatment.<h4>Conclusions</h4>We present an ELISA method for improved analysis of sputum periostin by detecting cleavage products of the periostin protein. Using this assay, sputum periostin was detectable and associated with more disease-relevant parameters in asthma than serum periostin. Sputum periostin is worth considering as a phenotype-specific biomarker in asthma as its proximity to the airways may eliminate some of the confounding factors known to affect serum periostin.https://doi.org/10.1371/journal.pone.0281356 |
| spellingShingle | Junya Ono Masayuki Takai Ayami Kamei Shoichiro Ohta Parameswaran Nair Kenji Izuhara Sven-Erik Dahlén Anna James BIOAIR consortium A novel assay for improved detection of sputum periostin in patients with asthma. PLoS ONE |
| title | A novel assay for improved detection of sputum periostin in patients with asthma. |
| title_full | A novel assay for improved detection of sputum periostin in patients with asthma. |
| title_fullStr | A novel assay for improved detection of sputum periostin in patients with asthma. |
| title_full_unstemmed | A novel assay for improved detection of sputum periostin in patients with asthma. |
| title_short | A novel assay for improved detection of sputum periostin in patients with asthma. |
| title_sort | novel assay for improved detection of sputum periostin in patients with asthma |
| url | https://doi.org/10.1371/journal.pone.0281356 |
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