biostudies-literatureLiu CHMinistry of Science and TechnologyAcademia SinicaTaipei Tzu Chi Hospital441-449https://www.ebi.ac.uk/biostudies/studies/S-EPMC11896190biostudies-literatureUnknown36(6)Although human leucocyte antigen (HLA)-B27 is strongly associated with ankylosing spondylitis (AS), the association of unfolded protein response (UPR) induced by HLA-B27 misfolding in AS remains controversial. Since dendritic cells (DCs) are crucial in induction of AS in HLA-B27-transgenic rats, and plasmacytoid DCs (pDCs) belong to one type of DCs, we here aim to study the relevance of pDCs and UPR in AS. Peripheral pDCs were isolated from 27 HLA-B27(+) AS patients and 37 controls. The bone marrow (BM) and synovium of inflamed hips from AS patients and controls were obtained. We found a significantly higher frequency of pDCs in the peripheral blood, BM, or inflamed synovium of hips, which is associated with the enhanced expression of pDC trafficking molecules, CCR6 and CCL20 in the synoviThe Kaohsiung journal of medical sciencesAberrant distribution and function of plasmacytoid dendritic cells in patients with ankylosing spondylitis are associated with unfolded protein response.PMC11896190108-2321-B-400 -018TCRD-TPE-106-41108‐2321‐B‐400 ‐018AS‐VTA‐108‐05TCRD‐TPE‐106‐41AS-VTA-108-05Liu CHWu YTTzeng ISLin KILiu FCTsai WCYang SYChen CHChou CTHung SCYue CTKo YAWang CCfalseAberrant distribution and function of plasmacytoid dendritic cells in patients with ankylosing spondylitis are associated with unfolded protein response.Although human leucocyte antigen (HLA)-B27 is strongly associated with ankylosing spondylitis (AS), the association of unfolded protein response (UPR) induced by HLA-B27 misfolding in AS remains controversial. Since dendritic cells (DCs) are crucial in induction of AS in HLA-B27-transgenic rats, and plasmacytoid DCs (pDCs) belong to one type of DCs, we here aim to study the relevance of pDCs and UPR in AS. Peripheral pDCs were isolated from 27 HLA-B27(+) AS patients and 37 controls. The bone marrow (BM) and synovium of inflamed hips from AS patients and controls were obtained. We found a significantly higher frequency of pDCs in the peripheral blood, BM, or inflamed synovium of hips, which is associated with the enhanced expression of pDC trafficking molecules, CCR6 and CCL20 in the synovi2020-01-01T00:00:00Z2020 Jun2025-07-26T03:06:45.178Z2025-07-26T03:06:45.178ZS-EPMC118961903196105510.1002/kjm2.12184