Salbutamol Worsens the Autonomic Nervous System Dysfunction of Children With Sickle Cell Disease.

Abstract:

Background:Sickle cell disease (SCD) patients with asthma have an increased rate of vaso-occlusive crisis (VOC) and acute chest syndrome (ACS) episodes when compared to those without asthma. We hypothesized that either asthma diagnosis or bronchodilator treatment might aggravate SCD via their modulating effect on the autonomic nervous system (ANS). Methods:Cross-sectional evaluation of heart rate variability (HRV) during pulmonary function tests, including salbutamol administration, in children with SCD receiving asthma treatment or not when compared to asthmatic children without SCD matched for ethnicity. Results:SCD children with asthma (n = 30, median age of 12.9 years old) were characterized by a reduced FEV1/FVC ratio, an increased bronchodilator response, and a greater incidence of VOC and ACS when compared to SCD children without asthma (n = 30, 12.7 years). Children with asthma without SCD (n = 29, 11.4 years) were characterized by a higher exhaled NO fraction than SCD children. SCD children when compared to non-SCD children showed reduced HRV [total power, low (LF) and high (HF, vagal tone) frequencies], which was further worsened by salbutamol administration in all the groups: reduction in total power and HF with an increase in LF/HF ratio. After salbutamol, the LF/HF ratio of the SCD children was higher than that of the non-SCD children. The two groups of SCD children were similar, suggesting that asthma diagnosis per se did not modify ANS functions. Conclusion:SCD children are characterized by impaired parasympathetic control and sympathetic overactivity that is worsened by salbutamol administration. Clinical Trial Registration:www.ClinicalTrials.gov, identifier NCT04062409.

journal_name

Front Physiol

journal_title

Frontiers in physiology

authors

Bokov P,El Jurdi H,Denjoy I,Peiffer C,Medjahdi N,Holvoet L,Benkerrou M,Delclaux C

doi

10.3389/fphys.2020.00031

subject

Has Abstract

pub_date

2020-02-26 00:00:00

pages

31

issn

1664-042X

journal_volume

11

pub_type

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