PMID- 32430566 OWN - NLM STAT- MEDLINE DCOM- 20200911 LR - 20200911 IS - 1435-1250 (Electronic) IS - 0340-1855 (Linking) VI - 79 IP - 6 DP - 2020 Aug TI - [Pathogenesis of large vessel vasculitides]. PG - 505-515 LID - 10.1007/s00393-020-00809-z [doi] AB - Large vessel vasculitides comprise two distinct entities, giant cell arteritis (GCA) and Takayasu arteritis (TAK). GCA is the most common vasculitis in central Europe, becoming manifested at an age over 50 years. In contrast, the much rarer TAK affects almost exclusively young adults and mostly women. Both vasculitides are granulomatous arteritides affecting mainly the aorta and its major arterial branches. GCA and TAK are associated with different major histocompatibility complex genes. Infections possibly play a role in the initiation of large vessel vasculitides. Activation of dendritic cells in the adventitia induces chemokine and cytokine-mediated recruitment and maturation of T‑helper (Th)1 and Th17 cells and macrophages producing cytokines, growth factors and matrix metalloproteinases. In GCA, CD4+ T‑helper cells and macrophages are predominantly found in the inflammatory infiltrate. In TAK, the infiltrate also contains cytotoxic CD8+ T‑cells and gammadelta T‑cells. This could indicate different antigenic triggers in GCA and TAK. Inflammatory infiltration with T‑cells and macrophages and activation of myofibroblasts and smooth muscular cells induce vascular remodeling with intimal hyperplasia and destruction of the media. Remodeling is histologically characterized by progressive arterial wall fibrosis, vascular stenosis and obstruction. In summary, GCA and TAK represent two different entities with a distinct human leukocyte antigen (HLA) and potentially etiopathogenetic background. Clinically, inflammation-related general symptoms and signs of ischemia are encountered, accompanied by increased levels of serological markers of inflammation. FAU - Arnold, S AU - Arnold S AD - Klinik fur Rheumatologie und klinische Immunologie, Universitat zu Lubeck, Ratzeburger Allee 160, 23538, Lubeck, Deutschland. FAU - Holl Ulrich, K AU - Holl Ulrich K AD - Pathologie - Hamburg, Labor Lademannbogen MVZ GmbH, Hamburg, Deutschland. FAU - Lamprecht, P AU - Lamprecht P AD - Klinik fur Rheumatologie und klinische Immunologie, Universitat zu Lubeck, Ratzeburger Allee 160, 23538, Lubeck, Deutschland. peter.lamprecht@uksh.de. LA - ger PT - Journal Article PT - Review TT - Pathogenese der Grossgefassvaskulitiden. PL - Germany TA - Z Rheumatol JT - Zeitschrift fur Rheumatologie JID - 0414162 RN - 0 (Cytokines) SB - IM MH - Adult MH - Cytokines MH - Europe MH - Female MH - *Giant Cell Arteritis/immunology/pathology MH - Humans MH - Macrophages MH - Male MH - *Takayasu Arteritis/immunology/pathology MH - Young Adult OTO - NOTNLM OT - Giant cell arteritis OT - Granulomatous arteritis OT - Infections OT - Inflammation OT - Takayasu arteritis EDAT- 2020/05/21 06:00 MHDA- 2020/09/12 06:00 CRDT- 2020/05/21 06:00 PHST- 2020/05/21 06:00 [pubmed] PHST- 2020/09/12 06:00 [medline] PHST- 2020/05/21 06:00 [entrez] AID - 10.1007/s00393-020-00809-z [pii] AID - 10.1007/s00393-020-00809-z [doi] PST - ppublish SO - Z Rheumatol. 2020 Aug;79(6):505-515. doi: 10.1007/s00393-020-00809-z.