Similarities and differences of interstitial lung disease associated with pathogenic variants in SFTPC and ABCA3 in adults
© 2024 The Authors. Respirology published by John Wiley & Sons Australia, Ltd on behalf of Asian Pacific Society of Respirology..
BACKGROUND AND OBJECTIVE: Variants in surfactant genes SFTPC or ABCA3 are responsible for interstitial lung disease (ILD) in children and adults, with few studies in adults.
METHODS: We conducted a multicentre retrospective study of all consecutive adult patients diagnosed with ILD associated with variants in SFTPC or ABCA3 in the French rare pulmonary diseases network, OrphaLung. Variants and chest computed tomography (CT) features were centrally reviewed.
RESULTS: We included 36 patients (median age: 34 years, 20 males), 22 in the SFTPC group and 14 in the ABCA3 group. Clinical characteristics were similar between groups. Baseline median FVC was 59% ([52-72]) and DLco was 44% ([35-50]). An unclassifiable pattern of fibrosing ILD was the most frequent on chest CT, found in 85% of patients, however with a distinct phenotype with ground-glass opacities and/or cysts. Nonspecific interstitial pneumonia and usual interstitial pneumonia were the most common histological patterns in the ABCA3 group and in the SFTPC group, respectively. Annually, FVC and DLCO declined by 1.87% and 2.43% in the SFTPC group, respectively, and by 0.72% and 0.95% in the ABCA3 group, respectively (FVC, p = 0.014 and DLCO , p = 0.004 for comparison between groups). Median time to death or lung transplantation was 10 years in the SFTPC group and was not reached at the end of follow-up in the ABCA3 group.
CONCLUSION: SFTPC and ABCA3-associated ILD present with a distinct phenotype and prognosis. A radiologic pattern of fibrosing ILD with ground-glass opacities and/or cysts is frequently found in these rare conditions.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2024 |
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| Erschienen: |
2024 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:29 |
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| Enthalten in: |
Respirology (Carlton, Vic.) - 29(2024), 4 vom: 19. März, Seite 312-323 |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Diesler, Rémi [VerfasserIn] |
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| Links: |
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| Anmerkungen: |
Date Completed 19.03.2024 Date Revised 19.03.2024 published: Print-Electronic Citation Status MEDLINE |
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| doi: |
10.1111/resp.14667 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| 245 | 1 | 0 | |a Similarities and differences of interstitial lung disease associated with pathogenic variants in SFTPC and ABCA3 in adults |
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| 500 | |a Date Completed 19.03.2024 | ||
| 500 | |a Date Revised 19.03.2024 | ||
| 500 | |a published: Print-Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a © 2024 The Authors. Respirology published by John Wiley & Sons Australia, Ltd on behalf of Asian Pacific Society of Respirology. | ||
| 520 | |a BACKGROUND AND OBJECTIVE: Variants in surfactant genes SFTPC or ABCA3 are responsible for interstitial lung disease (ILD) in children and adults, with few studies in adults | ||
| 520 | |a METHODS: We conducted a multicentre retrospective study of all consecutive adult patients diagnosed with ILD associated with variants in SFTPC or ABCA3 in the French rare pulmonary diseases network, OrphaLung. Variants and chest computed tomography (CT) features were centrally reviewed | ||
| 520 | |a RESULTS: We included 36 patients (median age: 34 years, 20 males), 22 in the SFTPC group and 14 in the ABCA3 group. Clinical characteristics were similar between groups. Baseline median FVC was 59% ([52-72]) and DLco was 44% ([35-50]). An unclassifiable pattern of fibrosing ILD was the most frequent on chest CT, found in 85% of patients, however with a distinct phenotype with ground-glass opacities and/or cysts. Nonspecific interstitial pneumonia and usual interstitial pneumonia were the most common histological patterns in the ABCA3 group and in the SFTPC group, respectively. Annually, FVC and DLCO declined by 1.87% and 2.43% in the SFTPC group, respectively, and by 0.72% and 0.95% in the ABCA3 group, respectively (FVC, p = 0.014 and DLCO , p = 0.004 for comparison between groups). Median time to death or lung transplantation was 10 years in the SFTPC group and was not reached at the end of follow-up in the ABCA3 group | ||
| 520 | |a CONCLUSION: SFTPC and ABCA3-associated ILD present with a distinct phenotype and prognosis. A radiologic pattern of fibrosing ILD with ground-glass opacities and/or cysts is frequently found in these rare conditions | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a ABCA3 | |
| 650 | 4 | |a SFTPC | |
| 650 | 4 | |a adults | |
| 650 | 4 | |a fibrosing interstitial lung disease | |
| 650 | 4 | |a interstitial lung disease | |
| 650 | 4 | |a surfactant | |
| 650 | 7 | |a SFTPC protein, human |2 NLM | |
| 650 | 7 | |a Pulmonary Surfactant-Associated Protein C |2 NLM | |
| 650 | 7 | |a ABCA3 protein, human |2 NLM | |
| 650 | 7 | |a ATP-Binding Cassette Transporters |2 NLM | |
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| 700 | 1 | |a Dominique, Stéphane |e verfasserin |4 aut | |
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| 700 | 1 | |a Amselem, Serge |e verfasserin |4 aut | |
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| 700 | 1 | |a Brudon, Alexandre |e investigator |4 oth | |
| 700 | 1 | |a Cros, Pierrick |e investigator |4 oth | |
| 700 | 1 | |a Delestrain, Céline |e investigator |4 oth | |
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