Cytotoxic lymphocytes in COPD airways: increased NK cells associated with disease, iNKT and NKT-like cells with current smoking
Abstract Background Cytotoxic lymphocytes are increased in the airways of COPD patients. Whether this increase is driven primarily by the disease or by smoking is not clear, nor whether it correlates with the rate of decline in lung function. Methods Bronchoscopy with BAL was performed in 52 subject...
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| Format: | Article |
| Language: | English |
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BMC
2018-12-01
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| Series: | Respiratory Research |
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| Online Access: | http://link.springer.com/article/10.1186/s12931-018-0940-7 |
| _version_ | 1829487457439055872 |
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| author | Jonas Eriksson Ström Jamshid Pourazar Robert Linder Anders Blomberg Anne Lindberg Anders Bucht Annelie F. Behndig |
| author_facet | Jonas Eriksson Ström Jamshid Pourazar Robert Linder Anders Blomberg Anne Lindberg Anders Bucht Annelie F. Behndig |
| author_sort | Jonas Eriksson Ström |
| collection | DOAJ |
| description | Abstract Background Cytotoxic lymphocytes are increased in the airways of COPD patients. Whether this increase is driven primarily by the disease or by smoking is not clear, nor whether it correlates with the rate of decline in lung function. Methods Bronchoscopy with BAL was performed in 52 subjects recruited from the longitudinal OLIN COPD study according to pre-determined criteria; 12 with COPD and a rapid decline in lung function (loss of FEV1 ≥ 60 ml/year), 10 with COPD and a non-rapid decline in lung function (loss of FEV1 ≤ 30 ml/year), 15 current and ex-smokers and 15 non-smokers with normal lung function. BAL lymphocyte subsets were determined using flow cytometry. Results In BAL fluid, the proportions of NK, iNKT and NKT-like cells all increased with pack-years. Within the COPD group, NK cells – but not iNKT or NKT-like cells – were significantly elevated also in subjects that had quit smoking. In contrast, current smoking was associated with a marked increase in iNKT and NKT-like cells but not in NK cells. Rate of lung function decline did not significantly affect any of the results. Conclusions In summary, increased proportions of NK cells in BAL fluid were associated with COPD; iNKT and NKT-like cells with current smoking but not with COPD. Interestingly, NK cell percentages did not normalize in COPD subjects that had quit smoking, indicating that these cells might play a role in the continued disease progression seen in COPD even after smoking cessation. Trial registration Clinicaltrials.gov identifier NCT02729220. |
| first_indexed | 2024-12-14T23:29:01Z |
| format | Article |
| id | doaj.art-23d3171e324041318f29df5c5e84fe89 |
| institution | Directory Open Access Journal |
| issn | 1465-993X |
| language | English |
| last_indexed | 2024-12-14T23:29:01Z |
| publishDate | 2018-12-01 |
| publisher | BMC |
| record_format | Article |
| series | Respiratory Research |
| spelling | doaj.art-23d3171e324041318f29df5c5e84fe892022-12-21T22:43:44ZengBMCRespiratory Research1465-993X2018-12-0119111010.1186/s12931-018-0940-7Cytotoxic lymphocytes in COPD airways: increased NK cells associated with disease, iNKT and NKT-like cells with current smokingJonas Eriksson Ström0Jamshid Pourazar1Robert Linder2Anders Blomberg3Anne Lindberg4Anders Bucht5Annelie F. Behndig6Department of Public Health and Clinical Medicine, Division of Medicine, Umeå UniversityDepartment of Public Health and Clinical Medicine, Division of Medicine, Umeå UniversityDepartment of Public Health and Clinical Medicine, Division of Medicine, Umeå UniversityDepartment of Public Health and Clinical Medicine, Division of Medicine, Umeå UniversityDepartment of Public Health and Clinical Medicine, Division of Medicine, Umeå UniversitySwedish Defence Research Agency, Division of CBRN Defence and SecurityDepartment of Public Health and Clinical Medicine, Division of Medicine, Umeå UniversityAbstract Background Cytotoxic lymphocytes are increased in the airways of COPD patients. Whether this increase is driven primarily by the disease or by smoking is not clear, nor whether it correlates with the rate of decline in lung function. Methods Bronchoscopy with BAL was performed in 52 subjects recruited from the longitudinal OLIN COPD study according to pre-determined criteria; 12 with COPD and a rapid decline in lung function (loss of FEV1 ≥ 60 ml/year), 10 with COPD and a non-rapid decline in lung function (loss of FEV1 ≤ 30 ml/year), 15 current and ex-smokers and 15 non-smokers with normal lung function. BAL lymphocyte subsets were determined using flow cytometry. Results In BAL fluid, the proportions of NK, iNKT and NKT-like cells all increased with pack-years. Within the COPD group, NK cells – but not iNKT or NKT-like cells – were significantly elevated also in subjects that had quit smoking. In contrast, current smoking was associated with a marked increase in iNKT and NKT-like cells but not in NK cells. Rate of lung function decline did not significantly affect any of the results. Conclusions In summary, increased proportions of NK cells in BAL fluid were associated with COPD; iNKT and NKT-like cells with current smoking but not with COPD. Interestingly, NK cell percentages did not normalize in COPD subjects that had quit smoking, indicating that these cells might play a role in the continued disease progression seen in COPD even after smoking cessation. Trial registration Clinicaltrials.gov identifier NCT02729220.http://link.springer.com/article/10.1186/s12931-018-0940-7Chronic obstructive pulmonary diseaseDisease mechanismsLung function declineSmoking habitsBronchoalveolar lavage |
| spellingShingle | Jonas Eriksson Ström Jamshid Pourazar Robert Linder Anders Blomberg Anne Lindberg Anders Bucht Annelie F. Behndig Cytotoxic lymphocytes in COPD airways: increased NK cells associated with disease, iNKT and NKT-like cells with current smoking Respiratory Research Chronic obstructive pulmonary disease Disease mechanisms Lung function decline Smoking habits Bronchoalveolar lavage |
| title | Cytotoxic lymphocytes in COPD airways: increased NK cells associated with disease, iNKT and NKT-like cells with current smoking |
| title_full | Cytotoxic lymphocytes in COPD airways: increased NK cells associated with disease, iNKT and NKT-like cells with current smoking |
| title_fullStr | Cytotoxic lymphocytes in COPD airways: increased NK cells associated with disease, iNKT and NKT-like cells with current smoking |
| title_full_unstemmed | Cytotoxic lymphocytes in COPD airways: increased NK cells associated with disease, iNKT and NKT-like cells with current smoking |
| title_short | Cytotoxic lymphocytes in COPD airways: increased NK cells associated with disease, iNKT and NKT-like cells with current smoking |
| title_sort | cytotoxic lymphocytes in copd airways increased nk cells associated with disease inkt and nkt like cells with current smoking |
| topic | Chronic obstructive pulmonary disease Disease mechanisms Lung function decline Smoking habits Bronchoalveolar lavage |
| url | http://link.springer.com/article/10.1186/s12931-018-0940-7 |
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