Publications by authors named "Joo Song"

Respiratory viral infections are a major cause of asthma exacerbations. However, studies examining the association between symptoms, signs, treatments, outcomes of asthma exacerbations, and various respiratory viruses in children are limited. This study aims to investigate the association between respiratory viral infections and clinical symptoms and signs, treatment, and hospital admission in children with asthma exacerbations visiting the pediatric emergency department.

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Selective targeting of the functionally exhausted malignant T cells in cutaneous T-cell lymphoma (CTCL) and distinct cells within the tumor microenvironment (TME) via PD1/PD-L1 blockade (durvalumab) may restore an anti-tumor immune response. The oral immunomodulator lenalidomide, which has activity in CTCL, may enhance durvalumab immune checkpoint blockade. Our phase 1/2 clinical trial of durvalumab and lenalidomide in patients with refractory/advanced CTCL (NCT03011814) sought to assess safety and tolerability and identify the maximum tolerated dose/recommended phase 2 dose (RP2D) of lenalidomide plus fixed-dose durvalumab.

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Objective: Primary effusion lymphoma (PEL) is a rare non-Hodgkin lymphoma (NHL) subtype caused by Kaposi sarcoma (KS) herpesvirus. We describe PEL incidence and survival in people with HIV (PWH) and people without HIV in the US.

Design: Retrospective cohort study of PEL people with and without HIV.

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Most diffuse large B-cell lymphoma (DLBCL) patients treated with immunotherapies such as bispecific antibodies (BsAb) or chimeric antigen receptor (CAR) T cells fail to achieve durable treatment responses, underscoring the need for a deeper understanding of mechanisms that regulate the immune environment and response to treatment. Here, an integrative, multi-omic approach was applied to multiple large independent datasets in order to characterize DLBCL immune environments, and to define their association with tumor cell-intrinsic genomic alterations and outcomes to CD19-directed CAR T-cell and CD20 x CD3 BsAb therapies. This approach effectively segregated DLBCLs into four immune quadrants (IQ) defined by cell-of-origin and immune-related gene set expression scores.

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Background/aims: Although incidence and prevalence of inflammatory bowel disease (IBD) have been gradually increasing throughout Asia, incidence of venous thromboembolism (VTE) in Asia is relatively lower than that in Western and is not well known. This study aimed to evaluate incidence of VTE in Asian IBD patients using a systematic review and meta-analysis.

Methods: Studies were identified through literature search of the PubMed, Embase, and Cochrane databases (from inception inclusive April 2024) for English studies.

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One of the major difficulties in practical hematopathology is to accurately assign cell lineage and thus ensure proper classification of lymphomas. The lineage-specific markers of lymphoma are detected by immunohistochemistry or flow cytometry immunophenotypic methods. However, aberrant gain or loss of these markers is occasionally encountered during daily practice, which often creates diagnostic challenges.

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Background And Aim: The impact of different anti-thrombotic agents on patients with suspected small bowel bleeding (SSBB) who underwent balloon-assisted enteroscopy (DAE) is unclear. We aimed to examine the clinical effects and predictive factors of DAE based on the thromboembolic agents used.

Methods: We enrolled 399 patients with SSBB from a web-based DAE registry across 30 medical centers in South Korea.

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Background: Predose trough concentrations (C) of intravenous infliximab (IV-IFX) during maintenance therapy are associated with therapeutic outcomes in patients with Crohn's disease (CD). A subcutaneous formulation of infliximab (SC-IFX) has shown high C values due to its favourable pharmacokinetics.

Aims: To evaluate the association of C of SC-IFX with therapeutic outcomes and the threshold of SC-IFX C for achieving mucosal healing (MH) and transmural healing (TH) in patients with CD.

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Article Synopsis
  • High-grade B-cell lymphoma not otherwise specified (HGBCL, NOS) shares similarities with diffuse large B-cell lymphoma (DLBCL) and Burkitt lymphoma (BL), which complicates its diagnosis and treatment.
  • A study on a cohort of 55 patients revealed that about 60% of HGBCL, NOS cases don't express the BL gene signature and instead display characteristics aligned with DLBCL, while showing significant genetic diversity and changes in critical regulatory genes.
  • Pediatric HGBCL, NOS cases exhibited gene expressions typical of GCB-DLBCL and also showed key mutations seen in pediatric BL; the research highlighted PIM1 mutations in adults as a potential target for new therapies.
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  • Understanding the phenotypes and endotypes of atopic dermatitis (AD) is crucial for creating tailored treatments, and recent research highlights the connection between gut health and skin conditions.
  • The study analyzed data from a large cohort of children to identify five distinct AD phenotypes and their risk factors, particularly focusing on the early-onset persistent and late-onset types.
  • Multiomics analyses revealed specific gut microbiome and metabolic characteristics associated with these phenotypes, suggesting that early-life gut health may influence the development and severity of AD in children.
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Peripheral T-cell lymphoma (PTCL) is a heterogeneous group of neoplasms, with many cases remaining unclassifiable and categorized as PTCL-not otherwise specified (PTCL-NOS). Gene expression profiling (GEP) has delineated 2 prognostic subtypes within PTCL-NOS, PTCL-TBX21 and PTCL-GATA3, characterized by distinctive transcriptomes and a different prognosis. To further evaluate the pathologic features of these subgroups, 101 PTCL cases that did not meet specific criteria for well-defined T-cell lymphoma entities underwent detailed pathologic, immunophenotypic (including T follicular helper [T] biomarkers), and GEP analyses, separating them into PTCL-NOS (n = 63) and PTCL-TFH (also known as nodal PTCL-TFH, NOS, and TFH lymphoma, NOS) (n = 38).

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Objective: The aim of this study was to investigate the association between blood levels of tumor necrosis factor-α (TNF-α) and interleukin-6 (IL-6) and cognitive impairments among elderly individuals.

Methods: Peripheral concentration of TNF-α and IL-6 were measured in all subjects. To assess individual cognitive function, the Consortium to Establish a Registry for Alzheimer's Disease Neuropsychological Assessment Battery (CERAD-NP) was used, and standardized scores (z-scores) were calculated for each test.

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Article Synopsis
  • Brentuximab vedotin has been shown to improve outcomes in treating advanced classic Hodgkin's lymphoma, but it also causes more toxic side effects in adults, while many pediatric patients still need radiation therapy and face challenges with relapse.
  • A phase 3 trial involving patients aged 12 and older tested two treatment combinations: brentuximab vedotin with standard chemotherapy (BV+AVD) versus nivolumab with standard chemotherapy (N+AVD), aiming to assess progression-free survival.
  • Results indicated that N+AVD significantly enhances progression-free survival compared to BV+AVD, with a 2-year survival rate of 92% for N+AVD versus 83% for BV
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Tumor draining lymph nodes (TDLN) represent a key component of the tumor-immunity cycle. There are few studies describing how TDLNs impact lymphocyte infiltration into tumors. Here we directly compare tumor-free TDLNs draining "cold" and "hot" human triple negative breast cancers (TDLN and TDLN).

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  • Epstein-Barr Virus (EBV) positive primary cutaneous marginal zone lymphoma (PCMZL) is rare and can transform into more aggressive forms, like plasmablastic lymphoma (PBL), which is often fatal.
  • The case discussed involves a patient with multifocal PCMZL who experienced a sequence of transformations, eventually leading to disease progression and death, despite various treatments, with genetic mutations similar across lymphomas indicating a common origin.
  • A review of 18 cases shows that nearly half of patients with transformed PCMZL succumbed to the disease, particularly those diagnosed with multiple disease sites, highlighting the poor prognosis associated with this transformation.
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  • Doctors studied 88 patients who got a medicine called blinatumomab to see how it affected their spinal fluid (CSF) and if it caused pleocytosis, which means there are more white blood cells in the CSF.
  • They found that about half of the patients had pleocytosis (51%) and it happened more often after two weeks of treatment.
  • Even though pleocytosis was common, it didn't seem to change how well the treatment worked or cause extra problems, except it may have lowered the chances of cancer spreading outside the brain and spinal cord.
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  • IL1RAP is selectively expressed on AML cells and leukemic stem cells, making it a promising target for treatment without affecting normal blood stem cells.
  • BIF002, a novel anti-IL1RAP/CD3 T cell engager, showed strong anti-leukemic effects in laboratory tests and patient samples, significantly activating T cells and leading to the destruction of AML cells.
  • In animal models, BIF002 demonstrated a marked reduction in leukemic cells and extended survival rates, with no observable safety issues, indicating its potential effectiveness in treating AML.
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Lymphoplasmacytic lymphoma (LPL) is an incurable low-grade lymphoma with no standard therapy. Nine asymptomatic patients treated with a first-in-human, neoantigen DNA vaccine experienced no dose limiting toxicities (primary endpoint, NCT01209871). All patients achieve stable disease or better, with one minor response, and median time to progression of 72+ months.

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Article Synopsis
  • - Richter's transformation (RT) is when chronic lymphocytic leukemia (CLL) progresses to a more aggressive lymphoma type; the gene involved in this process is mutated more frequently in RT (36%) compared to CLL (3%).
  • - Researchers created a mouse model for RT using CRISPR-Cas9 to knock out this gene, finding that RT cells showed mitochondrial issues and increased oxidative phosphorylation (OXPHOS).
  • - By studying RNA sequences, the team identified a potential target that drives RT through OXPHOS modulation, suggesting that combining therapies to inhibit both MYC and a key electron transport chain component could improve survival for RT-infected mice.
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Peripheral T-cell lymphomas (PTCLs) have a poor prognosis with current treatments. High-dose chemotherapy followed by autologous hematopoietic cell transplant (AHCT) is used as a consolidation strategy after achieving clinical remission with first-line therapy, as well as in chemotherapy-sensitive relapse if allogeneic transplant is not an option. CD25 is a targetable protein often highly expressed in PTCLs.

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According to the current guidelines, additional surgery is performed for endoscopically resected specimens of early colorectal cancer (CRC) with a high risk of lymph node metastasis (LNM). However, the rate of LNM is 2.1-25.

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Background/aims: Despite advances in imaging and endoscopic technology, diagnostic modalities for small bowel tumors are simultaneously performed. We investigated the discrepancy rate between each modality and predictive factors of discrepancy in patients with definite small bowel tumors.

Methods: Data of patients with definite small bowel tumors who underwent both device-assisted enteroscopy (DAE) and computed tomography (CT) were retrieved from web-based enteroscopy registry database in Korea.

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