Abstract
Background: Fatty acid oxidation (FAO) disorders are a heterogeneous group of inborn errors in the transportation and oxidation of fatty acids. FAO disorders were thought to be very rare in the Chinese population. Newborn screening for FAO disorders beginning in 2002 in Taiwan may have increased the diagnosis of this group of diseases.
Materials and Methods: Till 2012, the National Taiwan University Hospital Newborn Screening Center screened more than 800,000 newborns for FAO disorders. Both patients diagnosed through screening and patients detected after clinical manifestations were included in this study.
Results: A total of 48 patients with FAO disorders were identified during the study period. The disorders included carnitine palmitoyltransferase I deficiency, carnitine acylcarnitine translocase deficiency, carnitine palmitoyltransferase II deficiency, very long-chain acyl-CoA dehydrogenase deficiency, medium-chain acyl-CoA dehydrogenase deficiency, multiple acyl-CoA dehydrogenase deficiency, short-chain defects, and carnitine uptake defect. Thirty-nine patients were diagnosed through newborn screening. Five false-negative newborn screening cases were noted during this period, and four patients who were not screened were diagnosed based on clinical manifestations. The ages of all patients ranged from 6 months to 22.9 years (mean age 6.6 years). Except for one case of postmortem diagnosis, there were no other mortalities.
Conclusions: The combined incidence of FAO disorders estimated by newborn screening in the Chinese population in Taiwan is 1 in 20,271 live births. Newborn screening also increases the awareness of FAO disorders and triggers clinical diagnoses of these diseases.
Competing interests: None declared
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Abbreviations
- CACT:
-
Carnitine acylcarnitine translocase
- CPT I:
-
Carnitine palmitoyltransferase 1
- CPT II:
-
Carnitine palmitoyltransferase 2
- CUD:
-
Systemic carnitine uptake defect
- FAO:
-
Fatty acid oxidation
- LCHAD/mTFP:
-
Long-chain 3-hydroxy acyl-CoA dehydrogenase/mitochondrial trifunctional protein
- MAD deficiency/GA II:
-
Multiple acyl-CoA dehydrogenase deficiency/glutaric aciduria type II (synonym)
- MCAD:
-
Medium-chain acyl-CoA dehydrogenase
- MS/MS:
-
Tandem mass spectrometry
- NBS:
-
Newborn screening
- SCAD:
-
Short-chain acyl-CoA dehydrogenase
- VLCAD:
-
Very-long-chain acyl-CoA dehydrogenase
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Acknowledgment
We thank Dr. Nicola Longo from the University of Utah for performing the mutation analysis for patients of CPT I deficiency and CPT II deficiency. This study was partially support by grants (DOH94-HP-2203, DOH95-HP-2207) from the Department of Health, Taiwan.
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Chien, YH. et al. (2013). Fatty Acid Oxidation Disorders in a Chinese Population in Taiwan. In: Zschocke, J., Gibson, K., Brown, G., Morava, E., Peters, V. (eds) JIMD Reports - Volume 11. JIMD Reports, vol 11. Springer, Berlin, Heidelberg. https://doi.org/10.1007/8904_2013_236
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DOI: https://doi.org/10.1007/8904_2013_236
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