Rheumatoid arthritis (RA) is a chronic, progressive, autoimmune disease characterized primarily by inflammation of synovial joints and tendon sheaths of synovial nature.
Sleep disturbance in RA patients has a negative impact on their quality of life in addition to their mental and physical health. Exercise has been identified as an important non-pharmacological factor in improving sleep quality and mood in patients with rheumatoid arthritis.
Irisin is a myokine and adipokine that has anti-inflammatory effects and can help regulate energy expenditure. It is secreted from skeletal muscles after exercise, as well as from other tissues such as the liver, nerves, heart, kidneys and skin. It has been observed that serum irisin levels are decreased in RA patients with poor sleep quality compared to RA patients with good sleep quality.
BDNF, one of the biochemical parameters evaluating sleep, is a signal protein encoded by the BDNF gene located on chromosome 11. It belongs to the neurotrophin family, which regulates the survival, development and function of neurons. Neuronal activity is a powerful stimulant that elicits BDNF production. Thus, activation of brain areas associated with motor control during exercise contributes to increased BDNF production in the brain and additionally in plasma. During acute exercise, irisin stimulates BDNF expression in the hippocampus of the brain. In addition to the circadian variation of plasma BDNF, the blood concentration of BDNF has been shown to increase acutely in response to aerobic exercise that does not include resistance exercise. Moreover, it has been reported that people with higher basal serum BDNF concentrations have lower REM sleep and therefore less sleep disturbances.
This investigation was designed as prospective randomized controlled study. Participants were randomized into 3 groups; RA patients receiving aerobic and home exercise, RA patients receiving only home exercise and healthy control group.
As evaluation parameters, DAS28 Score, SF (Short form) -36 Quality of Life Scale, Pittsburgh Sleep Quality Index (PSQI), Fatigue Severity Scale (FSS), Beck Depression Inventory (BDI), 6 Minute Walk Test and Borg Scale will be evaluated with. It was planned that the evaluations were made and recorded by a blinded physician to the all patients with rheumatoid arthritis at the beginning of the treatment and at the end of the treatment.In the healthy control group, the evaluation parameters will be examined only once at the beginning of the study.
At the beginning of the treatment and at the end of the treatment (4th week), serum BDNF and irisin levels will be tested using the ELISA kit, with blood samples taken from the RA patients in the early morning. It will be checked whether there is a difference between the basal serum BDNF and irisin levels of rheumatoid arthritis patients with the blood sample taken only once in the early morning from the healthy control group.