Flow cytometry analysis of T-cell subsets in cerebrospinal fluid of narcolepsy type 1 patients with long-lasting disease
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Flow cytometry analysis of T-cell subsets in cerebrospinal fluid of narcolepsy type 1 patients with long-lasting disease. / Moresco, Monica; Lecciso, Mariangela; Ocadlikova, Darina; Filardi, Marco; Melzi, Silvia; Kornum, Birgitte Rahbek; Antelmi, Elena; Pizza, Fabio; Mignot, Emmanuel; Curti, Antonio; Plazzi, Giuseppe.
In: Sleep Medicine, Vol. 44, 2018, p. 53-60.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Flow cytometry analysis of T-cell subsets in cerebrospinal fluid of narcolepsy type 1 patients with long-lasting disease
AU - Moresco, Monica
AU - Lecciso, Mariangela
AU - Ocadlikova, Darina
AU - Filardi, Marco
AU - Melzi, Silvia
AU - Kornum, Birgitte Rahbek
AU - Antelmi, Elena
AU - Pizza, Fabio
AU - Mignot, Emmanuel
AU - Curti, Antonio
AU - Plazzi, Giuseppe
N1 - Copyright © 2017 Elsevier B.V. All rights reserved.
PY - 2018
Y1 - 2018
N2 - BACKGROUND: Type 1 narcolepsy (NT1) is a central hypersomnia linked to the destruction of hypocretin-producing neurons. A great body of genetic and epidemiological data points to likely autoimmune disease aetiology. Recent reports have characterized peripheral blood T-cell subsets in NT1, whereas data regarding the cerebrospinal fluid (CSF) immune cell composition are lacking. The current study aimed to characterize the T-cell and natural killer (NK) cell subsets in NT1 patients with long disease course.METHODS: Immune cell subsets from CSF and peripheral blood mononuclear cell (PBMC) samples were analysed by flow cytometry in two age-balanced and sex-balanced groups of 14 NT1 patients versus 14 healthy controls. The frequency of CSF cell groups was compared with PBMCs. Non-parametric tests were used for statistical analyses.RESULTS: The NT1 patients did not show significant differences of CSF immune cell subsets compared to controls, despite a trend towards higher CD4+ terminally differentiated effector memory T cells. T cells preferentially displayed a memory phenotype in the CSF compared to PBMCs. Furthermore, a reduced frequency of CD4+ terminally differentiated effector memory T cells and an increased frequency of NK CD56bright cells was observed in PBMCs from patients compared to controls. Finally, the ratio between CSF and peripheral CD4+ terminally differentiated effector memory T cells was two-fold increased in NT1 patients versus controls.CONCLUSIONS: Significant differences in PBMCs and in CSF/PBMC ratios of immune cell profile were found in NT1 patients compared to healthy controls. These differences might have arisen from the different HLA status, or be primary or secondary to hypocretin deficiency. Further functional studies in patients close to disease onset are required to understand NT1 pathophysiology.
AB - BACKGROUND: Type 1 narcolepsy (NT1) is a central hypersomnia linked to the destruction of hypocretin-producing neurons. A great body of genetic and epidemiological data points to likely autoimmune disease aetiology. Recent reports have characterized peripheral blood T-cell subsets in NT1, whereas data regarding the cerebrospinal fluid (CSF) immune cell composition are lacking. The current study aimed to characterize the T-cell and natural killer (NK) cell subsets in NT1 patients with long disease course.METHODS: Immune cell subsets from CSF and peripheral blood mononuclear cell (PBMC) samples were analysed by flow cytometry in two age-balanced and sex-balanced groups of 14 NT1 patients versus 14 healthy controls. The frequency of CSF cell groups was compared with PBMCs. Non-parametric tests were used for statistical analyses.RESULTS: The NT1 patients did not show significant differences of CSF immune cell subsets compared to controls, despite a trend towards higher CD4+ terminally differentiated effector memory T cells. T cells preferentially displayed a memory phenotype in the CSF compared to PBMCs. Furthermore, a reduced frequency of CD4+ terminally differentiated effector memory T cells and an increased frequency of NK CD56bright cells was observed in PBMCs from patients compared to controls. Finally, the ratio between CSF and peripheral CD4+ terminally differentiated effector memory T cells was two-fold increased in NT1 patients versus controls.CONCLUSIONS: Significant differences in PBMCs and in CSF/PBMC ratios of immune cell profile were found in NT1 patients compared to healthy controls. These differences might have arisen from the different HLA status, or be primary or secondary to hypocretin deficiency. Further functional studies in patients close to disease onset are required to understand NT1 pathophysiology.
U2 - 10.1016/j.sleep.2017.11.1150
DO - 10.1016/j.sleep.2017.11.1150
M3 - Journal article
C2 - 29530370
VL - 44
SP - 53
EP - 60
JO - Sleep Medicine
JF - Sleep Medicine
SN - 1389-9457
ER -
ID: 196168313