Summary
Background:
Anderson–Fabry disease (AFD) is an X-linked disorder caused by deficient activity of enzyme α-galactosidase A, resulting in the accumulation of glycosphingolipids within lysosomes. Pulmonary involvement in AFD has previously been documented, but until now has been studied only in a few series of patients without any longitudinal follow-up. The aim of this study was to compare spirometric changes in AFD patients with a matched control population and to follow the subsequent progression of the disease.
Materials and methods:
Fifty individuals (27 women, 23 men, mean age 40±14 years) with AFD from 14 families underwent a static spirometric examination under standard conditions. A set of indices was compared with that of the control population. Out of this cohort, 39 individuals not receiving enzyme replacement therapy were longitudinally evaluated (median follow-up time 24 months).
Results:
A clinically significant reduction in spirometric parameters, corresponding to mild to severe airway obstruction, was observed in 26% of women and 61% of men. During the serial follow-up, a significant (p<0.05) age-dependent reduction of predicted %FVC and %FEV1 values was observed in male patients, while the influence of age was not seen in female patients. The %FEF25–75 values decreased by similar degrees in men and women and in older and younger patients, indicating that progressive bronchial disease affects the small airways first.
Conclusions:
We have demonstrated a clinically relevant age- and sex-dependent progressive pulmonary involvement in AFD patients. The effects of enzyme replacement therapy on pulmonary involvement remain to be demonstrated.
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Communicating editor: Ed Wraith
Competing interests: None declared
References to electronic databases: Fabry disease: OMIM 301500.
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Magage, S., Lubanda, JC., Susa, Z. et al. Natural history of the respiratory involvement in Anderson–Fabry disease. J Inherit Metab Dis 30, 790–799 (2007). https://doi.org/10.1007/s10545-007-0616-9
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DOI: https://doi.org/10.1007/s10545-007-0616-9