Melissa L Mehalick, Karen B Schmaling, Daniel E Sabath, Dedra S Buchwald
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引用次数: 5
Abstract
Background: Chronic fatigue syndrome (CFS) is characterized by prolonged fatigue and other physical and neurocognitive symptoms. Some studies suggest that CFS is accompanied by disruptions in the number and function of various lymphocytes. However, it is not clear which lymphocytes might influence CFS symptoms.
Purpose: To determine if patient reported fatigue symptoms and physical functioning scores significantly changed across time with lymphocyte counts as evidence of a relation among chronic fatigue symptoms and the immune response.
Methods: The current longitudinal, naturalistic study assessed the cellular expression of three lymphocyte subtypes -- natural killer (NK) cells (CD3-CD16+ and CD3-CD56+) and naïve T cells (CD4+CD45RA+) -- to determine whether changes in lymphocytes at 4 time points across 18 months were associated with clinical outcomes, including CFS symptoms, physical functioning, and vitality, among patients with chronic fatigue.. Latent growth curve models were used to examine the longitudinal relationship between lymphocytes and clinical outcomes.
Results: Ninety-three patients with Fukuda-based CFS and seven with non-CFS fatigue provided study data. Results indicated that higher proportions of naïve T cells and lower proportions of NK cells were associated with worse physical functioning, whereas higher proportions of NK cells (CD3-CD16+) and lower proportions of naïve T cells were associated with fewer CFS symptoms.
Conclusion: These findings suggest that lymphocytes are modestly related to clinical outcomes over time.
期刊介绍：
Fatigue: Biomedicine, Health and Behavior is an international, interdisciplinary journal that addresses the symptom of fatigue in medical illnesses, behavioral disorders, and specific environmental conditions. These broadly conceived domains, all housed in one journal, are intended to advance research on causation, pathophysiology, assessment, and treatment. The list of topics covered in Fatigue will include fatigue in diseases including cancer, autoimmune diseases, multiple sclerosis, pain conditions, mood disorders, and circulatory diseases. The journal will also publish papers on chronic fatigue syndrome, fibromyalgia and related illnesses. In addition, submissions on specific issues involving fatigue in sleep, aging, exercise and sport, and occupations are welcomed. More generally, the journal will publish on the biology, physiology and psychosocial aspects of fatigue. The Editor also welcomes new topics such as clinical fatigue education in medical schools and public health policy with respect to fatigue.
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