Frequency of the cholesteryl ester storage disease common LIPA E8SJM mutation (c.894G>A) in various racial and ethnic groups. Issue 3 (29th July 2013)

• Record Type: Journal Article
• Authors: Scott, Stuart A.; Liu, Benny; Nazarenko, Irina; Martis, Suparna; Kozlitina, Julia; Yang, Yao; Ramirez, Charina; Kasai, Yumi; Hyatt, Tommy; Peter, Inga; Desnick, Robert J.
• Is Part Of: Hepatology. Volume 58:Issue 3(2013:Sep.)
• Page Start: 958
• Page End: 965
• Publication Date: 2013-07-29
• Subjects: Heart -- Diseases -- Nursing -- Periodicals; Lungs -- Diseases -- Nursing -- Periodicals; Intensive care nursing -- Periodicals; Foie -- Maladies -- Périodiques; 616.362
• DOI: 10.1002/hep.26327
• Languages: English
• ISSNs: 0270-9139

Abstract

<abstract abstract-type="main"> <title> <x xml:space="preserve">Abstract</x> </title> <p>Cholesteryl ester storage disease (CESD) and Wolman disease are autosomal recessive later‐onset and severe infantile disorders, respectively, which result from the deficient activity of lysosomal acid lipase (LAL). LAL is encoded by <italic>LIPA</italic> (10q23.31) and the most common mutation associated with CESD is an exon 8 splice junction mutation (c.894G>A; E8SJM), which expresses only ∼3%‐5% of normally spliced LAL. However, the frequency of c.894G>A is unknown in most populations. To estimate the prevalence of CESD in different populations, the frequencies of the c.894G>A mutation were determined in 10, 000 <italic>LIPA</italic> alleles from healthy African‐American, Asian, Caucasian, Hispanic, and Ashkenazi Jewish individuals from the greater New York metropolitan area and 6, 578 <italic>LIPA</italic> alleles from African‐American, Caucasian, and Hispanic subjects enrolled in the Dallas Heart Study. The combined c.894G>A allele frequencies from the two cohorts ranged from 0.0005 (Asian) to 0.0017 (Caucasian and Hispanic), which translated to carrier frequencies of 1 in 1, 000 to ∼1 in 300, respectively. No African‐American heterozygotes were detected. Additionally, by surveying the available literature, c.894G>A was estimated to account for 60% (95% confidence interval [CI]: 51%‐69%) of reported mutations among multiethnic CESD patients. Using this estimate, the predicted prevalence of CESD in the Caucasian and Hispanic populations is ∼0.8 per 100, 000 (∼1 in 130, 000; 95% CI: ∼1 in 90, 000 to 1 in 170, 000). <italic>Conclusion</italic>: These data indicate that CESD may be underdiagnosed in the general Caucasian and Hispanic populations, which is important since clinical trials of enzyme replacement therapy for LAL deficiency are currently being developed. Moreover, future studies on CESD prevalence in African and Asian populations may require full‐gene <italic>LIPA</italic> sequencing to determine heterozygote frequencies, since c.894G>A is not common in these racial groups. (H<sc>EPATOLOGY</sc> 2013;53:958–965)</p> </abstract>