Autoimmune Disease and Fatigue
Primary Pathophysiologic Mechanisms
- Pro-inflammatory cytokines directly induce central nervous system changes that generate fatigue, independent of peripheral disease activity 1
- The immune system, central and autonomic nervous systems, and neuroendocrine system all contribute to fatigue induction and maintenance in autoimmune conditions 2
Secondary Contributing Factors
- Anemia significantly contributes to fatigue and requires thorough investigation and treatment 4, 5
- Patients with autoimmune disease are at high risk for multiple nutrient deficiencies due to chronic inflammation, malabsorption, and impaired muscle strength 3, 4, 5
- Low serum vitamin D, IGF-1, and magnesium specifically correlate with muscle fatigue and self-reported fatigue severity 7
- All nutrient deficiencies should be corrected with dietitian referral when appropriate 3, 6
Clinical Characteristics
- Fatigue in autoimmune disease is typically chronic, irreversible, not alleviated by rest, and not related to exertion 3, 4
- Fatigue can persist even during clinical remission, affecting over 40% of patients with inactive disease 7, 6
- Fatigue does not necessarily correlate with disease activity and can persist when gastrointestinal or other organ-specific symptoms are controlled 6