Sleep disorders of acute thalamic stroke and its influence on plasma IL-17.

The aim of this study was to investigate the relationship between sleep disorders in acute thalamus stroke patients and plasma IL-17 levels and the mechanism through which inflammatory reactions develop in stroke. The study included two groups of patients: an experimental group consisting of 30 patients with thalamus stroke who received treatment at the Affiliated Hong Qi Hospital of Mu Dan Jiang Medical University during October 2015 to October 2016 and a control group consisting of 15 healthy volunteers. All the subjects included in the study were biochemically monitored for blood glucose, blood fats and IL-17 plasma levels. The sleep quality of all the subjects included in the study was evaluated [Epwort, Pittsburgh Sleep Quality Index (PSQI)] with 8-hour Polysonmography (PSG) monitoring. The experimental group was divided into 3 subgroups according to the part of the brain affected by stroke: anterior thalamus nucleus group, lateral thalamus nucleus group and medial thalamus nucleus group. The differences were analyzed between the experimental group and the control group in sleep quality scores, sleep structural changes, and plasma IL-17 levels. The differences in sleep structural scores were also analyzed according to different parts of the brain affected by stroke. The experimental group had a higher PSQI score compared with the control group, but this difference had no statistical significance (p>0.05). Compared with the control group, the N1 phase of the experimental group was longer while the N2 and N3 phases were shorter (p<0.05). There were no differences in sleep structure between the three regions of the brain affected by stroke (anterior thalamus nucleus group, lateral thalamus nucleus group and medial thalamus nucleus group) (p > 0.05). The plasma levels of IL-17 in the experimental group was higher compared to the control group (p<0.05). In the experimental group, the patients with hypersomnia had higher IL-17 levels than patients without hypersomnia (p<0.01). We can conclude that PSG can be used as an electrophysiology index for early detection of sleep disorders in thalamus stroke patients. Sleep disorders in patients with thalamus stroke persist a long time after the incident, therefore monitoring their sleep structure may become an important index to predict the prognosis of the disease. The increased level of IL-17 level in the experimental group shows its implication in appearance of sleep disorders of acute thalamus stroke through inflammatory mechanism.