Publications by authors named "Yonsu Son"

Article Synopsis
  • - The study investigates how different biological and targeted synthetic anti-rheumatic drugs (b/tsDMARDs) affect kidney function in patients with rheumatoid arthritis (RA), particularly focusing on the incidence of chronic kidney disease (CKD).
  • - Researchers followed 2,187 patients and evaluated the effects of tumor necrosis factor inhibitors (TNFi), cytotoxic T lymphocyte-associated antigen-4-Ig (CTLA4-Ig), interleukin-6 receptor inhibitors (IL-6Ri), and Janus kinase inhibitors (JAKi) on kidney health. They found that TNFi was linked to a lower CKD risk, while JAKi was associated with a higher risk.
  • - The findings suggest that
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Article Synopsis
  • Psoriasis, a complicated skin condition linked to inflammation, has unclear connections between its severity, related cytokine levels, and heart disease risk.
  • This study aimed to identify serum markers to help monitor cardiovascular disease (CVD) risk in psoriasis patients by examining relationships between cytokines and coronary artery health.
  • Key findings highlight that specific cytokines (IL-17A, IL-19, IL-36) correlate with psoriasis severity, while markers like CD31 and resistin show promise for tracking coronary atherosclerosis progression, particularly in patients with psoriasis vulgaris.
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Data on the safety of Janus kinase inhibitors (JAKis) in patients with renal impairment are lacking. This study aimed to investigate the safety of JAKis compared to biological (b) DMARDs in patients with rheumatoid arthritis (RA) and renal impairment. We used a multi-centre observational registry of patients with RA in Japan (the ANSWER cohort).

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Objectives: To investigate the predictive factors for difficult-to-treat rheumatoid arthritis (D2T RA) and assess the efficacy of biologic DMARDs (bDMARDs) and Janus kinase inhibitors (JAKi).

Methods: Retrospective analysis was conducted on data from the ANSWER cohort comprising 3623 RA patients treated with bDMARDs or JAKi in Japan. Multivariate Cox proportional hazards modelling was used to analyse the hazard ratios (HRs) for treatment retention.

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  • The study aimed to explore how large joint involvement (LJI) impacts disease activity and medication retention in rheumatoid arthritis (RA) patients starting biological therapies or Janus kinase inhibitors.
  • Researchers analyzed data from 1721 patients, finding that LJI led to significant improvements in disease activity at 24 weeks, but patients with LJI had higher overall disease activity levels.
  • Although drug retention rates were similar between patients with and without LJI, the findings suggest that early treatment strategies, particularly using interleukin-6 receptor inhibitors, could benefit those with LJI.
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  • A multicentre, retrospective study analyzed the retention rates and reasons for stopping treatment in elderly patients with rheumatoid arthritis (EORA), comparing Janus kinase inhibitors (JAKi) to biologic disease-modifying drugs.
  • The study found that IL-6 inhibitors had better retention rates than TNF inhibitors, while JAKi showed lower discontinuation due to ineffectiveness but higher rates of discontinuation due to adverse events compared to TNF inhibitors.
  • The conclusions suggest that while IL-6i and JAKi are effective for EORA patients, the increased risk associated with JAKi requires careful consideration and a tailored treatment approach.
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Objectives: The objective of this study was to examine the effectiveness and drug tolerability of biological DMARD (bDMARD) and Janus kinase inhibitor (JAKi) monotherapy in patients with RA in a multicentre cohort study.

Methods: Patients with RA for whom bDMARD/JAKi monotherapy without conventional synthetic DMARDs has been initiated were included. Monotherapy regimens were categorized as IL-6 receptor inhibitors (IL-6Ris), cytotoxic T-lymphocyte-associated protein 4 immunoglobulin (CTLA4Ig), JAKis, or TNF inhibitors (TNFis).

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Article Synopsis
  • The study aimed to assess changes in disease activity among elderly RA patients over 75 years old in Japan from 2014 to 2021.
  • Data showed an increase in the percentage of elderly patients achieving remission and low disease activity (LDA), with rates rising from 62.2% to 78.2% during that time.
  • Factors that positively influenced remission and LDA included the use of methotrexate, while glucocorticoid use and previous b/tsDMARDs treatments negatively impacted these outcomes.
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Objectives: This multicentre retrospective study in Japan aimed to assess the retention of biological disease-modifying antirheumatic drugs and Janus kinase inhibitors (JAKi), and to clarify the factors affecting their retention in a real-world cohort of patients with rheumatoid arthritis.

Methods: The study included 6666 treatment courses (bDMARD-naïve or JAKi-naïve cases, 55.4%; tumour necrosis factor inhibitors (TNFi) = 3577; anti-interleukin-6 receptor antibodies (aIL-6R) = 1497; cytotoxic T lymphocyte-associated antigen-4-Ig (CTLA4-Ig) = 1139; JAKi=453 cases).

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Objectives: Anaemia, a common comorbidity of RA, is related to high disease activity and poor prognosis. It is unknown which biologic/targeted synthetic (b/ts)-DMARDs are optimal for patients with anaemia and RA in regulating anaemia and controlling disease activity.

Methods: We investigated the change in haemoglobin (Hb) levels, drug retention rates and disease activities after the administration of b/ts-DMARDs with different modes of action [TNF inhibitors (TNFis), immunoglobulin fused with cytotoxic T-lymphocyte antigen (CTLA-4-Ig), IL-6 receptor inhibitors (IL-6Ris) and Janus kinase inhibitors (JAKis)] in patients with RA stratified by baseline Hb levels using the multicentre observational registry for patients with RA in Japan (ANSWER cohort).

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This multicenter retrospective study aimed to clarify the prognostic factors for mortality and changes in treatment modalities and disease activities after the onset of pneumonia (PCP) in patients with rheumatoid arthritis (RA). Data regarding the clinical background, treatment modalities, and disease activity indicators of RA at the onset of PCP (baseline), and 6 months and 12 months after treatment were extracted. Of the 37 patients with RA-PCP (median age, 69 years; 73% female), chemical prophylaxis was administered to 8.

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Psoriasis is known as an independent risk factor for cardiovascular disease due to its chronic inflammation. Studies have been conducted to evaluate the progress of atherosclerotic plaques in psoriasis. However, inadequate efforts have been made to clarify the relationship between atherosclerosis progress in coronary arteries and other important blood vessels.

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The aim of this multi-centre retrospective study was to clarify the prognostic factors for respiratory-related death in patients with interstitial lung disease (ILD) complicated rheumatoid arthritis (RA). Patient background data, treatment regimen, and disease activity indicators of RA and ILD at baseline, 6 months after the diagnosis of ILD, and at the last follow-up visit were extracted. A total of 312 patients with RA-ILD (17 patients who died from respiratory-related causes and 295 survivors) were included.

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Anti-melanoma differentiation-associated gene 5 (MDA-5) antibody-positive dermatomyositis is a disease with a poor prognosis associated with rapid progressive interstitial pneumonia. Autoimmune diseases have occasionally been reported to occur after hematopoietic stem cell transplantation (HSCT). We experienced a case of anti-MDA-5 antibody-positive dermatomyositis after HSCT.

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Objectives: This multicenter, retrospective study evaluated the effectiveness of add-on methotrexate (MTX) or iguratimod (IGU) in patients with rheumatoid arthritis exhibiting an inadequate response to Janus kinase inhibitors (JAKis).

Methods: Forty-five patients were treated with new additional MTX (n = 22) or IGU (n = 23) and followed for 6 months. Patients' background is as follows: age, 59.

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Article Synopsis
  • Rheumatoid factor (RF) can bind to the Fc portion of anti-TNF inhibitors, potentially reducing their effectiveness in treating rheumatoid arthritis (RA).
  • A study using data from the Kansai Consortium analyzed the therapeutic efficacy of two types of TNF inhibitors—those with Fc and those without Fc—among RA patients classified by RF titres.
  • Results showed that patients treated with TNFi without Fc experienced a significantly lower disease activity score (DAS28-ESR) after 12 months compared to those treated with TNFi with Fc, indicating that TNFi without Fc may be more effective for RA patients with high RF levels.
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  • This study analyzed factors affecting the retention of Janus kinase inhibitors (JAKi) like baricitinib (BAR) and tofacitinib (TOF) in rheumatoid arthritis (RA) patients across multiple centers.
  • It found that the main reasons for discontinuation were ineffectiveness (22.3%), toxic adverse events (13.3%), non-toxic reasons (7.2%), with no discontinuations due to remission.
  • Key risk factors for discontinuation included a history of anti-IL-6R ineffectiveness, age (≥ 75 years), high doses of prednisone (≥ 5 mg/day), and being female; while prior treatments and the type of JAKi did not significantly impact discontinu
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Objectives: Rheumatoid arthritis (RA) is a chronic inflammatory disease characterized by localized and generalized bone loss. The risk of fractures is doubled in patients with RA. Denosumab, an anti-RANKL monoclonal antibody, is used for those with osteoporosis at high risk fracture and it has inhibitory effect of progressive bone erosion in patients with RA.

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Psoriasis is a systemic inflammatory disease known to affect survival in the presence of cerebral or cardiovascular comorbidities. However, no clear guidelines have been defined regarding the extent of vascular lesion testing that should be performed in patients with psoriasis. We therefore performed coronary computed tomography angiography (CCTA) in 88 Japanese patients with psoriasis who visited Kansai Medical University Hospital between 2015 and 2019 and determined the ankle-brachial pressure index (ABI) for 44 of these patients.

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Objective: We aimed to investigate the efficacy of anti-IL-6 receptor antibody (aIL-6) and other biologic disease-modifying antirheumatic drugs (bDMARDs), such as TNF inhibitor and CTLA4-Ig in the treatment of rheumatoid arthritis (RA) in patients with knee joint involvement.

Methods: We retrospectively analyzed 1059 treatment courses of patients with RA who visited our hospitals and were treated with bDMARDs. We categorized them into two groups, with or without knee joint involvement.

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Background: This multi-center, retrospective study aimed to clarify retention rates and reasons for discontinuation of either tumor necrosis factor inhibitors (TNFi) or interleukin-6 inhibitors (IL-6i) in patients with elderly-onset rheumatoid arthritis (EORA).

Methods: Patients with rheumatoid arthritis (RA) enrolled in a Japanese multicenter observational registry between 2011 and 2020 were included. EORA was defined as RA with onset at 60 or over.

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Objectives: The aim of this multicenter, retrospective study was to clarify the retention rates of sarilumab (SAR), baricitinib (BAR), and tofacitinib (TOF) in patients with rheumatoid arthritis (RA).

Methods: Patients treated with either SAR (n = 62), BAR (n = 166), or TOF (n = 185) (females, 80.9%; age, 61.

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Background: Both humoral and cellular immune mechanisms are involved in the onset and progression of autoimmune responses in systemic lupus erythematosus (SLE). Plasmacytoid dendritic cells (pDCs) play a central role in the pathogenesis of SLE via the dysregulation of type I interferon (IFN) production; these cells act together with activated myeloid DCs (mDCs) to amplify the vicious pathogenic spiral of autoimmune disorders. Therefore, control of aberrant DC activation in SLE may provide an alternative treatment strategy against this disease.

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The objective of the study was to compare the efficacy and safety of biological disease-modifying antirheumatic drugs (bDMARDs) between elderly-onset rheumatoid arthritis (EORA) and young-onset rheumatoid arthritis (YORA) patients. Patients with rheumatoid arthritis (RA) aged ≧18 years enrolled in a Japanese multicenter observational registry between 2009 and 2018 who had moderate or high disease activity when initiating bDMARDs were included. EORA was defined as RA with onset at 60 or over.

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