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Effect of high-dose fluticasone propionate on bone density and metabolism in children with asthma
Amanda L Griffiths1, Derrick Sim, Boyd Strauss
1Department of Respiratory and Sleep Medicine, Monash Medical Centre, Clayton, and Centre for Heart and Chest Research, Monash University, Melbourne, Australia. agriffiths@paed.uwa.edu.au
Insights
High-dose inhaled fluticasone propionate (FP) did not significantly impact bone metabolism markers in children with asthma. Bone age-corrected bone mineral density also showed no significant reduction with prolonged FP use.
Area of Science:
- Pediatric Pulmonology
- Pediatric Endocrinology
- Bone Metabolism
Background:
- Long-term side effects of inhaled corticosteroids (ICS) are a significant concern.
- High-dose inhaled fluticasone propionate (FP) is commonly used for persistent asthma in children.
Purpose of the Study:
- To evaluate the effect of high-dose FP on biochemical markers of bone metabolism.
- To assess bone mineral density (BMD) in children with asthma using high-dose FP.
Main Methods:
- Cross-sectional study comparing children with asthma on high-dose FP (> 1,000 mcg/day) with healthy controls.
- Analysis of serum bone formation markers and urine bone resorption markers.
- Dual-energy X-ray absorptiometry (DEXA) for bone density assessment in a subgroup.
Main Results:
- No significant differences in biochemical markers of bone metabolism between asthmatic children and controls.
- A subgroup of asthmatic children showed lumbar spine density more than one standard deviation below the mean, which normalized after bone age correction.
- Prolonged high-dose FP use did not lead to significant reductions in bone metabolism or bone age-corrected BMD.
Conclusions:
- High-dose inhaled fluticasone propionate (FP) appears safe concerning bone metabolism and bone mineral density in children with asthma.
- Bone age correction is crucial when interpreting BMD in pediatric populations.
- Further longitudinal studies may be warranted to confirm these findings.
Abstract:
Significant concern remains over the long-term side effects of inhaled steroids. This cross-sectional study evaluates the effect of high-dose inhaled fluticasone propionate (FP) on biochemical markers of bone metabolism and bone density in children with asthma. Children with chronic asthma using FP >/= 1,000 mcg daily for at least 6 months, and healthy controls, were entered in the study. No children had taken oral prednisolone within the previous month. Fasting morning serum was analyzed for bone formation markers, and spot urine for bone resorption markers. Dual-energy X-ray absorptiometry (DEXA) results were reviewed in a subgroup of patients. Forty-nine children with asthma and 32 controls were recruited. The mean FP dose was 771.2 +/- 253.35 mcg/m2/day. Unpaired t-test analysis revealed no significant difference in biochemical markers studied. In subjects with asthma; 13 of 37 (35.1%) had lumbar spine density more than one standard deviation below the mean (P = 0.001). This fell to 6/37 (16.2%) with bone age correction (NS). In conclusion, no significant reduction in bone metabolism or bone age-corrected bone mineral density was observed in children with asthma on prolonged high doses of inhaled FP.
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