Circulation Journal
Online ISSN : 1347-4820
Print ISSN : 1346-9843
ISSN-L : 1346-9843
Plasma Globotriaosylsphingosine Level as a Primary Screening Target for Fabry Disease in Patients With Left Ventricular Hypertrophy
Satoshi YamashitaMasao SaotomeHiroshi SatohJun KajiharaYusaku MochizukiKimito MizunoMamoru NobuharaKeisuke MiyajimaAzumi KumazawaHiromutsu TominagaHiroyuki TakaseKei TawaraharaNobuyuki WakaharaMasaki MatsunagaYasushi WakabayashiYuji MatsumotoHajime TeradaMakoto SanoHayato OhtaniTsuyoshi UrushidaHideharu HayashiSatoshi IshiiHiroki MaruyamaYuichiro Maekawa
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Article ID: CJ-19-0110

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Abstract

Background:Although previous studies have suggested a certain prevalence of Fabry disease (FD) in left ventricular hypertrophy (LVH) patients, the screening of FD is difficult because of its wide-ranging clinical phenotypes. We aimed to clarify the utility of combined measurement of plasma globotriaosylsphingosine (lyso-Gb3) concentration and α-galactosidase A activity (α-GAL) as a primary screening of FD in unexplained LVH patients.

Methods and Results:Between 2014 and 2016, both lyso-Gb3 and α-GAL were measured in 277 consecutive patients (male 215, female 62, age 25–79 years) with left ventricular wall thickness >12 mm on echocardiogram: 5 patients (1.8%) screened positive (2 (0.7%) showed high lyso-Gb3 and 4 (1.4%) had low α-GAL levels). Finally, 2 patients (0.7%) were diagnosed with clinically significant FD. In 1 case, a female heterozygote with normal α-GAL levels had genetic variants of unknown significance and was diagnosed as FD by endomyocardial biopsy. The other case was a male chronic renal failure patient requiring hemodialysis, and he had a p.R112H mutation. In both cases there were high lyso-Gb3 levels.

Conclusions:The serum lyso-Gb3 level can be relevant for clinically significant FD, and combined measurement of lyso-Gb3 and α-GAL can provide better screening of FD in unexplained LVH patients.

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© 2019 THE JAPANESE CIRCULATION SOCIETY
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