Publications by authors named "Kenichi Nishimura"

Background: Robot-assisted surgery is widely performed for renal cell carcinoma (RCC) with inferior vena cava (IVC) tumor thrombi. Although many chemotherapeutic options are available for the treatment of unresectable RCC, there are very few reports on robot-assisted radical nephrectomy (RARN) with inferior vena cava thrombectomy (IVCT) after presurgical treatment with immune checkpoint inhibitors and tyrosine kinase inhibitors. We believe that pre-surgical treatment can provide minimally invasive surgical benefits to high-risk patients during the perioperative period.

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  • The Briganti nomogram, with a 5% cut-off, is used to decide if pelvic lymph node dissection (PLND) is necessary for prostate cancer patients.
  • A study analyzed data from 1,068 patients who had radical prostatectomy and found no significant oncological benefit of PLND for those with a Briganti score of 5%.
  • High PSA levels and advanced T-stage were linked to worse biochemical recurrence-free survival, while PLND did not have a meaningful impact on recurrence outcomes.
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  • The article aims to update evidence on the effectiveness and safety of DMARDs for rheumatoid arthritis (RA) to inform the 2024 guidelines by the Japan College of Rheumatology.
  • A thorough search included randomized controlled trials published until June 2022, with independent reviews and meta-analyses conducted on 15 clinical questions related to RA treatment.
  • Key findings indicate that subcutaneous methotrexate is as effective as oral, ozoralizumab with methotrexate is more effective than a placebo, and biosimilars are equally effective as their original counterparts in treating RA.
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  • - This systematic review evaluated how effective and safe tumor necrosis factor (TNF) inhibitors are for treating systemic juvenile idiopathic arthritis (JIA) by examining various studies from 2000 to 2021.
  • - The review included one randomized controlled trial (RCT) and 22 observational studies, with the RCT showing that infliximab had moderate efficacy (ACR Pediatric responses of about 63.8% at 14 weeks) but also reported significant side effects like anaphylaxis in 17% of patients.
  • - The findings suggest that while TNF inhibitors appear relatively safe, they are not very effective for systemic JIA, indicating a need for more rigorous research to better evaluate their use in these
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Objectives: This systematic review assessed the efficacy and safety of abatacept in patients with systemic juvenile idiopathic arthritis (JIA).

Methods: Studies published between 2000 and 2021 were searched using PubMed, Embase, Cochrane, Ichushi-Web, and clinical trial registries. The risk of bias was assessed according to the manual for development clinical practice guidelines by Minds, a project to promote evidence-based medicine in Japan.

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  • Vadadustat is being studied for treating anemia in patients with chronic kidney disease (CKD), focusing on factors that affect its effectiveness in both nondialysis-dependent (NDD) and hemodialysis-dependent (HDD) patients.
  • The analysis involved 136 NDD and 140 HDD CKD patients, looking at variables like body weight-adjusted dose and hemoglobin levels to understand responsiveness to vadadustat.
  • Key factors influencing treatment response included baseline hemoglobin, kidney function, ferritin levels, and certain patient characteristics, which could guide future dosing strategies.
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  • The study investigates the clinical features of patients with cryopyrin-associated periodic syndrome (CAPS) in Japan and assesses the effectiveness and safety of the IL-1 inhibitor canakinumab in treating these patients.
  • Out of 101 patients analyzed, a significant majority achieved complete remission with canakinumab, but 23.7% did not respond, experiencing serious complications including deaths and organ damage.
  • The research highlights the importance of early intervention and suggests that combining canakinumab with other therapies can be beneficial for those who don't adequately respond to canakinumab alone.
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Background: Japanese men receiving apalutamide often experience skin-adverse events (AEs), possibly requiring treatment interruption or dose reduction. However, concerns have arisen regarding the impact of these adjustments on the efficacy of apalutamide. Our study evaluated the efficacy, safety, and persistence of apalutamide in men with metastatic castration-sensitive prostate cancer (mCSPC).

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Autoimmune lymphoproliferative syndrome (ALPS) is a disease of lymphocyte homeostasis caused by FAS-mediated apoptotic pathway dysfunction and is characterized by non-malignant lymphoproliferation with an increased number of TCRαβ+CD4-CD8- double-negative T cells (αβDNTs). Conversely, RAS-associated leukoproliferative disease (RALD), which is caused by gain-of-functional somatic variants in KRAS or NRAS, is considered a group of diseases with a similar course. Herein, we present a 7-year-old Japanese female of RALD harboring NRAS variant that aggressively progressed to juvenile myelomonocytic leukemia (JMML) with increased αβDNTs.

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Arthritis is one complication of Kawasaki disease (KD); however, the clinical features of arthritis in KD have not been well clarified. We retrospectively investigated the characteristics of persistent arthritis beyond the subacute phase of KD. In this cohort, 49 of 243 patients (20%) developed arthritis, with 33 patients (14%) experiencing persistent arthritis.

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  • The study aimed to understand how pediatric rheumatologists treat systemic juvenile idiopathic arthritis (s-JIA) that leads to macrophage activation syndrome (MAS), and to evaluate the effectiveness of dexamethasone palmitate (DEX-P) in this context.
  • Conducted across 13 centers in Japan, the research involved 28 patients and assessed treatment methods and any adverse effects observed.
  • Findings showed that the most common first-line treatments were methylprednisolone (mPSL) and Cyclosporine A (CsA), with DEX-P used successfully as a second-line treatment for those unresponsive to corticosteroids, without serious side effects reported.
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Objectives: The objective of the study was to report the efficacy and safety of canakinumab treatment in Japanese patients with systemic juvenile idiopathic arthritis (sJIA) over a 48-week study period.

Methods: Patients were administered canakinumab 4 mg/kg (maximum dose 300 mg) every 4 weeks, with no dose adjustments. The key outcome measures included adapted American College of Rheumatology paediatric (aACR pedi) 30/50/70/90/100 response, proportion of patients with inactive disease, and corticosteroid (CS) tapering.

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Immune checkpoint inhibitor (ICI) therapy increases the risk of immune-related adverse events (irAEs). In particular, combination checkpoint blockade (CCB) targeting inhibitory CTLA-4 and PD-1 receptors could lead to irAEs at a higher rate than ICI monotherapy. Management of irAEs is important while using ICIs.

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  • A study investigated skin adverse events in Japanese patients with advanced prostate cancer undergoing treatment with apalutamide, finding that 46.2% experienced these events.
  • The median time for the onset and resolution of these skin issues was approximately 62 days and 30 days, respectively, with a notable percentage (12.6%) suffering from severe (grade 3) reactions.
  • The research concluded that no specific clinical risk factors were identified for these skin events, but the duration until treatment discontinuation was longer for patients whose adverse events worsened.
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Hypertrophic pachymeningitis (HP) is a rare inflammatory disorder characterised by local or diffuse thickening of the cranial and spinal dura mater. HP occurs owing to idiopathic or secondary causes, including autoimmune disease, infection, and trauma. HP has mainly been reported in adults, with few reported cases in children.

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Objective: Systemic juvenile idiopathic arthritis (sJIA) is characterized by fever, arthritis, rash, hepatosplenomegaly, and macrophage activation syndrome; however, its pathogenesis is still unclear. Elevated serum interleukin (IL)-18 concentrations and decreased natural killer (NK) cell activity are characteristic of active disease; thus, we examined IL-18 signaling in NK cells from sJIA.

Methods: We analyzed mitogen-activated protein kinase (MAPK) p38 and nuclear factor κ light chain enhancer of activated B cells (NFκB) p65 phosphorylation in NK cells after in vitro recombinant IL-18 (rIL-18) stimulation in 31 patients with sJIA.

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Introduction: Haploinsufficiency of A20 (HA20) is a form of inborn errors of immunity (IEI). IEIs are genetically occurring diseases, some of which cause intestinal dysbiosis. Due to the dysregulation of regulatory T cells (Tregs) observed in patients with HA20, gut dysbiosis was associated with Tregs in intestinal lamina propria.

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Background: Heparin-induced thrombocytopenia (HIT) is a serious adverse effect of heparin. Additionally, although heparin can affect kidney transplantation, there only have been a few reports on this condition. Here, we report a case wherein surgery was safely performed with preoperative plasmapheresis in a patient with HIT.

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Objective: We compared the contrast-enhancement effects of the coronary arterial phase and the aortic phase in coronary and aorta computed tomography angiography (CA-CTA) using the bolus-tracking technique-based single-peak contrast medium injection (BT-SPI) method and the bolus-tracking technique-based dual-peak contrast medium injection (BT-DPI) method.

Method: CA-CTA images were acquired from 30 patients, using BT-SPI and BT-DPI. Regions of interest were selected in the right ventricle and ascending aorta during the coronary arterial phase, and in the aorta during the aortic phase to obtain mean CT values.

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Background: Patients with very-high-risk prostate cancer (VHRPCa) have earlier biochemical recurrences (BCRs) and higher mortality rates. It remains unknown whether extended robot-assisted laparoscopic prostatectomy (eRALP) without neoadjuvant or adjuvant therapy can improve the outcomes of VHRPCa patients. We aimed to determine the feasibility and efficacy of eRALP as a form of monotherapy for VHRPCa.

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Background: Currently, immunotherapy is indicated for patients with metastatic RCC or unresectable RCC, but there is no indication for immunotherapy in the neoadjuvant setting. We report a case in which the combined use of nivolumab and ipilimumab and sequential TKI therapy enabled surgical treatment.

Case Presentation: A 71-year-old female was diagnosed with a metastatic clear-cell renal cell carcinoma with a level IV tumor thrombus.

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The transcription factor IRF5 has been implicated as a therapeutic target for the autoimmune disease systemic lupus erythematosus (SLE). However, IRF5 activation status during the disease course and the effects of IRF5 inhibition after disease onset are unclear. Here, we show that SLE patients in both the active and remission phase have aberrant activation of IRF5 and interferon-stimulated genes.

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The management of blood pressure is a significant concern for surgeons and anesthesiologists performing adrenalectomy for pheochromocytoma. We evaluated clinical factors in pheochromocytoma patients to identify the predictors of postoperative hypotension. The medical records of patients who underwent adrenalectomy for pheochromocytoma between 2001 and 2017 were retrospectively reviewed and clinical and biochemical data were evaluated.

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