Prevalence of the HLA-DQB1*0602 allele in narcolepsy and idiopathic hypersomnia patients seen at a sleep disorders outpatient unit in São Paulo

Revista Brasileira de Psiquiatria

Fernando Morgadinho Santos Coelho¹  Márcia Pradella-hallinan¹  Mario Predazzoli Neto¹  Lia Rita Azeredo Bittencourt¹  Sérgio Tufik¹ 

[1] ,Universidade Federal de São Paulo Psychobiology Department São Paulo SP ,Brazil

关键词: HLA-DQB1*0602 allele;    Narcolepsy;    Hypersomnolence;    idiopathic;    Outpatients;    Diagnosis;    Alelo HLA-DQB1*0602;    Narcolepsia;    Hipersonolência idiopática;    Pacientes ambulatoriais;    Diagnóstico;   

DOI  :  10.1590/S1516-44462009000100004

来源: SciELO

【 摘 要 】

OBJECTIVE: Narcolepsy (with and without cataplexy) and idiopathic hypersomnia, are disorders with common features but with different HLA-DQB1*0602 allele prevalence. The present study describes the prevalence of HLA-DQB1*0602 allele in narcoleptics with and without cataplexy and in patients with idiopathic hypersomnia. METHOD: Subjects comprised 68 patients who were diagnosed for narcolepsy or idiopathic hypersomnia and 23 healthy controls according to the International Classification of Sleep Disorders-2. Subjects comprised 43 patients with narcolepsy and cataplexy, 11 patients with narcolepsy but without cataplexy, 14 patients with idiopathic hypersomnia and 23 healthy controls. Genotyping of HLA-DQB1*0602 allele was performed for all subjects. RESULTS: The prevalence of the HLA-DQB1*0602 allele was increased in idiopathic hypersomnia and in narcoleptic patients with and without cataplexy when compared to healthy subjects (p = 0.04; p = 0.03 and p < 0.0001, respectively). CONCLUSIONS: This finding is in accordance with those of previous studies. The gold standard exam of narcolepsy with cataplexy is Hypocretin-1 dosage, but in patients without cataplexy and idiopathic hypersomnia, there are no specific diagnostic lab findings. The presence of the HLA-DQB1* 0602 allele may be important for the differential diagnosis of situations that resemble those sleep disorders such as secondary changes in sleep structure due to drugs' consumption.

【 授权许可】

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