PMID- 28124760 OWN - NLM STAT- MEDLINE DCOM- 20170807 LR - 20181113 IS - 1434-9949 (Electronic) IS - 0770-3198 (Linking) VI - 36 IP - 4 DP - 2017 Apr TI - Neutrophil extracellular traps in neuropathy with anti-neutrophil cytoplasmic autoantibody-associated microscopic polyangiitis. PG - 913-917 LID - 10.1007/s10067-017-3546-4 [doi] AB - To clarify the roles of neutrophils in anti-neutrophil cytoplasmic autoantibody (ANCA)-associated vasculitic neuropathy, we studied neutrophil extracellular traps (NETs) in peripheral nerve vasculitis. Stored nerve samples from 17 patients with microscopic polyangiitis (MPA) were immunohistochemically analyzed using antibodies for citrullinated histone H3 (citH3) and various neutrophil enzymes. We defined merged citH3 and extracellularly released myeloperoxidase (MPO) as NET formation. We also compared NET formation between MPO-ANCA-positive/negative MPA and rheumatoid arthritis (RA)-associated vasculitic neuropathy. NETs were identified mostly in vasculitic small arterioles of 6 of 12 MPO-ANCA-positive MPA patients, and their frequency was higher (p < 0.05) than in ANCA-negative patients. NETs were not found in vasculitic neuropathy with RA or patients with chronic inflammatory demyelinating polyradiculoneuropathy. NETs were also observed in the peripheral nervous system of MPA patients as well as in the lung and kidney. These results suggest that NETs may be involved in the pathogenesis of MPA neuropathy. FAU - Takeuchi, Hiroki AU - Takeuchi H AD - Department of Neurology, National Hospital Organization Minami-Kyoto National Hospital, Joyo-shi, Kyoto, 610-0113, Japan. bambootakepv@gmail.com. FAU - Kawasaki, Teruaki AU - Kawasaki T AD - Center of Neurological and Cerebrovascular Diseases, Takeda Hospital, Kyoto, Japan. FAU - Shigematsu, Kazuo AU - Shigematsu K AD - Department of Neurology, National Hospital Organization Minami-Kyoto National Hospital, Joyo-shi, Kyoto, 610-0113, Japan. FAU - Kawamura, Kazuyuki AU - Kawamura K AD - Department of Neurology, National Hospital Organization Minami-Kyoto National Hospital, Joyo-shi, Kyoto, 610-0113, Japan. FAU - Oka, Nobuyuki AU - Oka N AD - Department of Neurology, National Hospital Organization Minami-Kyoto National Hospital, Joyo-shi, Kyoto, 610-0113, Japan. LA - eng PT - Comparative Study PT - Journal Article DEP - 20170126 PL - Germany TA - Clin Rheumatol JT - Clinical rheumatology JID - 8211469 RN - 0 (Antibodies, Antineutrophil Cytoplasmic) RN - EC 1.11.1.7 (Peroxidase) SB - IM MH - Aged MH - Anti-Neutrophil Cytoplasmic Antibody-Associated Vasculitis/complications/*diagnosis MH - Antibodies, Antineutrophil Cytoplasmic/*blood MH - Arthritis, Rheumatoid/complications MH - Extracellular Traps/*immunology MH - Female MH - Humans MH - Japan MH - Kidney/pathology MH - Male MH - Microscopic Polyangiitis/*complications MH - Middle Aged MH - Neutrophils/immunology MH - Peripheral Nerves/physiopathology MH - Peripheral Nervous System Diseases/*diagnosis MH - Peroxidase/blood MH - Retrospective Studies OTO - NOTNLM OT - MPO-ANCA OT - Microscopic polyangiitis OT - Neuropathy OT - Neutrophil extracellular traps OT - Peripheral nerve EDAT- 2017/01/27 06:00 MHDA- 2017/08/08 06:00 CRDT- 2017/01/27 06:00 PHST- 2016/11/17 00:00 [received] PHST- 2017/01/14 00:00 [accepted] PHST- 2017/01/12 00:00 [revised] PHST- 2017/01/27 06:00 [pubmed] PHST- 2017/08/08 06:00 [medline] PHST- 2017/01/27 06:00 [entrez] AID - 10.1007/s10067-017-3546-4 [pii] AID - 10.1007/s10067-017-3546-4 [doi] PST - ppublish SO - Clin Rheumatol. 2017 Apr;36(4):913-917. doi: 10.1007/s10067-017-3546-4. Epub 2017 Jan 26.