| Full text | |
| Author(s): |
Fernando Morgadinho Santos Coelho
[1]
;
Márcia Pradella-Hallinan
[2]
;
Gabriela Rodrigues Alves
[3]
;
Lia Rita Azeredo Bittencourt
[4]
;
Mário Pedrazzoli Neto
[5]
;
Fábio Moreira
[6]
;
Sérgio Tufik
[7]
Total Authors: 7
|
| Affiliation: | [1] UNIFESP. EPM. Sleep Disorders Institute - Brasil
[2] UNIFESP. EPM. Sleep Disorders Institute - Brasil
[3] UNIFESP. EPM. Sleep Disorders Institute - Brasil
[4] UNIFESP. EPM. Sleep Disorders Institute - Brasil
[5] UNIFESP. EPM. Sleep Disorders Institute - Brasil
[6] UNIFESP. EPM. Sleep Disorders Institute - Brasil
[7] UNIFESP. EPM. Sleep Disorders Institute - Brasil
Total Affiliations: 7
|
| Document type: | Journal article |
| Source: | Arquivos de Neuro-Psiquiatria; v. 65, p. 423-427, 2007-06-00. |
| Abstract | |
Narcolepsy is characterized by excessive daytime sleep and cataplexy. Little is known about the possible difference in pathophysiology between patients with or without cataplexy. OBJECTIVE: To quantify T CD4, T CD8 and B lymphocytes in subgroups of patients with narcolepsy and the presence or absence of the HLA-DQB1*0602 allele between groups. METHOD: Our study was prospective and controlled (transversal) with 22 narcoleptic patients and 23 health control subjects. Patients underwent an all-night polysomnographic recording (PSG) and a multiple sleep latency Test (MSLT). The histocompatibility antigen allele (HLA-DQB1*0602), T CD4, CD8 and B lymphocytes were quantified in control subjects and in narcoleptics. RESULTS: The HLA-DQB1*0602 allele was identified in 10 (62.5%) of our 16 cataplexic subjects and in 2 (33.3%) of the 6 patients without cataplexy (p=0.24). In control subjects, HLA-DQB1*0602 allele was identified in 5 (20%). A significant decrease in T CD4 and B lymphocytes was found in narcoleptic patients with recurrent cataplexy when compared with our patients without cataplexy. CONCLUSION: Autoimmune diseases such as systemic lupus erythematosus and rheumatoid arthritis were associated with a decrease in sub-group of T CD4 and B lymphocytes. A drop in B lymphocytes count in reumathoid arthritis might, it is posited, be correlated to the presence of HLA-DRB1 allele along with an overall worsened outcome of the affliction. The theory of an increase in consumption of B lymphocytes over the maturation phase has likewise been put forward. Our study reinforces the view that narcolepsy should be considered from an immunological perspective. (AU) | |
| FAPESP's process: | 98/14303-3 - Center for Sleep Studies |
| Grantee: | Sergio Tufik |
| Support Opportunities: | Research Grants - Research, Innovation and Dissemination Centers - RIDC |