Affiliation:
1. Neuromuscular and Neuroimmunology Unit IRCCS Humanitas Research Hospital Milan Italy
2. Neurology Residency Program Milan University Milan Italy
3. Department of Biomedical Sciences Humanitas University Milan Italy
4. Division of Rheumatology and Clinical Immunology IRCCS Humanitas Research Hospital Milan Italy
5. Department of Medicine, Surgery and Pharmacy Sassari University Sassari Italy
6. Department of Medical Biotechnology and Translational Medicine Milan University Milano Italy
Abstract
AbstractAdvances in the understanding of cytokines have revolutionized mechanistic treatments for chronic inflammatory and autoimmune diseases, as exemplified by rheumatoid arthritis. We conducted a systematic literature review on the role of cytokines and chemokines in chronic inflammatory demyelinating polyradiculoneuropathy (CIDP) and multifocal motor neuropathy (MMN). Ovid Medline, EMBASE and Web of Science were searched until August 31, 2022 for human studies investigating cytokines levels in CIDP or MMN. Fifty‐five articles on 1061 CIDP patients and 86 MMN patients were included, with a median of 18 patients per study (range 3–71). Studies differed in the inclusion criteria, type of assay, manufacturer, control subjects, and tested biological material. Only a minority of studies reported data on disease activity. Interleukin (IL)‐6, IL‐17, CXCL10, and tumor necrosis factor alpha (TNF‐α), were elevated in CIDP compared to controls in most of the studies. IL‐6 and TNF‐α levels are also correlated with disability. In MMN patients, IL‐1Ra was elevated in the majority of the reports. While acknowledging the challenges in comparing studies and the various limitations of the studies, including small patient numbers, particularly in MMN, our review suggests that IL‐6, IL‐17, CXCL10, and TNF‐α might play a role in CIDP pathogenesis. Larger studies are needed in MMN.
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