Publications by authors named "Ho V"

The use of haploidentical donor hematopoietic cell transplantation (haploHCT) has expanded, but recent reports raise concern for increased rates of infectious complications. The incidence and risk factors for invasive fungal disease (IFD) after haploHCT have not been well elucidated. This study aimed to evaluate the incidence and risk factors for IFD after haploHCT.

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CD6 is a co-stimulatory receptor expressed on T cells that binds activated leukocyte cell adhesion molecule (ALCAM), expressed on antigen presenting cells, epithelial and endothelial tissues. The CD6-ALCAM pathway plays an integral role in modulating T-cell activation, proliferation, and trafficking. In this study we examined expression of CD6 by reconstituting T cells in 95 patients after allogeneic cell transplantation and evaluated the effects of itolizumab, an anti- CD6 monoclonal antibody, on T-cell activation.

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Importance: Although nearly 1 million older patients are admitted for emergency general surgery (EGS) conditions yearly, long-term survival after these acute diseases is not well characterized. Many older patients with EGS conditions have preexisting complex multimorbidity defined as the co-occurrence of at least 2 of 3 key domains: chronic conditions, functional limitations, and geriatric syndromes. The hypothesis was that specific multimorbidity domain combinations are associated with differential long-term mortality after patient admission with EGS conditions.

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Chronic graft-versus-host disease (cGVHD) remains a frequent cause of nonrelapse morbidity and mortality after allogeneic hematopoietic stem cell transplantation. Despite recent advances, options for steroid-refractory (SR) cGVHD are limited. In previous trials of low-dose interleukin-2 (LD IL-2), the immunomodulatory properties of regulatory T cells (Tregs) have been harnessed to treat SR-cGVHD safely and effectively.

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Many patients with severe traumatic brain injuries (TBIs) undergo withdrawal of life-sustaining therapies (WLSTs) or transition to comfort measures, but noninjury factors that influence this decision have not been well characterized. We hypothesized that WLST would be associated with institutional and geographic noninjury factors. All patients with a head Abbreviated Injury Scale score ≥3 were identified from 2016 Trauma Quality Improvement Program data.

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Article Synopsis
  • - Hemophagocytic lymphohistiocytosis (HLH) is a serious syndrome caused by excessive immune activity, which can lead to severe inflammation and can be life-threatening if not treated quickly; treatment often involves reducing inflammation and, for severe cases, stem cell transplantation.
  • - A study at Dana-Farber Cancer Institute examined the outcomes of adult HLH patients who underwent allogeneic hematopoietic stem cell transplantation from 2010 onward, finding a 75% overall survival rate and 71% progression-free survival rate after three years.
  • - The research indicated that a reduced intensity conditioning approach with early alemtuzumab administration was effective, showing that allogeneic transplantation can offer a potentially curative
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Background: Exposure to polycyclic aromatic hydrocarbons (PAH) occurs widely in occupational settings. We investigated the association between occupational exposure to PAH and lung cancer risk and joint effects with smoking within the SYNERGY project.

Methods: We pooled 14 case-control studies with information on lifetime occupational and smoking histories conducted between 1985 and 2010 in Europe and Canada.

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Raman thermometry based on surface-enhanced Raman scattering has been developed using nanopipettes in cancer cell photothermal therapy (PTT). Gold nanorods (AuNRs) are robustly epoxied on glass pipettes with a high surface coverage of ∼95% and less than 10 nm-wide nanogaps for intracellular thermometry and photothermal cancer therapy. The temperature changes could be estimated from the N≡C band shifts of 4-fluorophenyl isocyanide (FPNC)-adsorbed AuNRs on the Raman thermometry nanopipette (RTN) surfaces.

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Hepatitis B virus (HBV) reactivation in allogeneic hematopoietic cell transplantation (HCT) recipients with evidence of pretransplantation resolved HBV infection is an important cause of morbidity, usually occurring 1 year or later after HCT. We retrospectively studied a cohort of allogeneic HCT recipients with resolved HBV infection, some of whom were vaccinated for HBV following transplantation, to understand whether post-HCT HBV vaccination influenced the risk of HBV reactivation. The study included all patients with resolved HBV who underwent allogeneic HCT at our institution between January 1, 2000, and December 31, 2015, where HBV vaccination starting at 1 year after HCT became standard in 2012 and antiviral prophylaxis is not used.

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Article Synopsis
  • The study aims to create a core outcome set specifically for male infertility research to standardize data collection and enhance research quality.
  • Existing challenges in male infertility research include inconsistencies in outcome measures and lack of participant perspectives, which the new core set will address.
  • An international steering group will use systematic reviews and consensus methods, like the modified Delphi method, to gather input from various stakeholders and determine prioritized outcomes.
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Background: Although nearly 1 million older adults are admitted for emergency general surgery conditions yearly, the extent to which baseline health influences the development and treatment of emergency general surgery conditions is unknown. We evaluated baseline health and older patients with and without emergency general surgery conditions.

Methods: We used the prospectively collected Medicare Current Beneficiary Survey with Medicare claims and 2 validated health frameworks: (1) Deficit Accumulation Frailty Score and (2) Complex Multimorbidity.

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Although private equity acquisition of short-term acute care hospitals purportedly improves efficiency and cost-effectiveness, financial performance after acquisition remains unexamined. We compared changes in the financial performance of 176 hospitals acquired during 2005-14 versus changes in matched control hospitals. Acquisition was associated with a $432 decrease in cost per adjusted discharge and a 1.

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Article Synopsis
  • Conventional donor lymphocyte infusion has low effectiveness for treating relapses after hematopoietic cell transplantation, prompting a trial of cytokine-induced memory-like (CIML) NK cell therapy in patients with myeloid malignancies.
  • In a phase I trial, 6 patients received donor-derived NK cells, resulting in rapid and sustained expansion of these cells post-infusion without serious adverse effects, although mild fever and pancytopenia were noted.
  • The successful expansion and long-term presence of CIML NK cells indicate their potential for treating relapses after transplantation, and further research is needed to understand their interactions with other immune cells and the tumor environment.
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Background: Ribosomal DNAs (rDNAs) are arranged in purely tandem repeats, preventing them from being reliably assembled onto chromosomes during generation of genome assembly. The uncertainty of rDNA genomic structure presents a significant barrier for studying their function and evolution.

Results: Here we generate ultra-long Oxford Nanopore Technologies (ONT) and short NGS reads to delineate the architecture and variation of the 5S rDNA cluster in the different strains of C.

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This cross-sectional study examines whether the expansion of level I and II trauma centers in Texas was associated with higher prices or more trauma activation fees.

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Background: With the COVID-19 pandemic, telehealth has been increasingly used to offset the negative outcomes of social isolation and functional decline in older adults. Crucial to the success of telehealth is end user adoption.

Objective: This study aims to investigate perception and acceptability of digital technology among Asian older adults.

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Objectives: Large-scale generation of universal red blood cells (RBCs) from O-negative (O-ve) human induced pluripotent stem cells (hiPSCs) holds the potential to alleviate worldwide shortages of blood and provide a safe and secure year-round supply. Mature RBCs and reticulocytes, the immature counterparts of RBCs generated during erythropoiesis, could also find important applications in research, for example in malaria parasite infection studies. However, one major challenge is the lack of a high-density culture platform for large-scale generation of RBCs in vitro.

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With its excellent mechanical and thermal properties, bilayer graphane is a promising material for realizing future nanoelectromechanical systems. In this study, we focus on the auxetic behavior of bilayer graphane under external loading along various directions through atomistic simulations. We numerically and theoretically reveal the mechanism of the auxeticity in terms of intrinsic interactions between carbon atoms by constructing bilayer graphane.

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Older patients with acute myeloid leukemia (AML) have high relapse risk and poor survival after allogeneic hematopoietic cell transplantation (HCT). Younger patients may receive myeloablative conditioning to mitigate relapse risk associated with high-risk genetics or measurable residual disease (MRD), but older adults typically receive reduced-intensity conditioning (RIC) to limit toxicity. To identify factors that drive HCT outcomes in older patients, we performed targeted mutational analysis (variant allele fraction ≥2%) on diagnostic samples from 295 patients with AML aged ≥60 years who underwent HCT in first complete remission, 91% of whom received RIC, and targeted duplex sequencing at remission in a subset comprising 192 patients.

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Background: While Society for Vascular Surgery guidelines recommend computed tomography angiography (CTA) or ultrasound for surveillance following infrarenal endovascular aortic repair (EVAR), there is a lack of consensus regarding optimal timing and modalities. We hypothesized that ultrasound-based approaches would be more cost-effective and developed a cost-effectiveness analysis to estimate the lifetime costs and outcomes of various strategies.

Methods: We developed a decision tree with nested Markov models to compare five surveillance strategies: yearly CTA, yearly CDU, yearly CEU, CTA at first year followed by CDU, and CTA at first year followed by CEU.

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Myxofibrosarcoma (MFS) is a rare mesenchymal soft tissue sarcoma type, with a high local recurrence (LR) rate. Robust epidemiological data on MFS are lacking. We, therefore, aimed to identify prognostic factors and describe real-life outcomes of a large cohort of 908 MFS patients obtained from the nationwide database of the Netherlands Cancer Registry and diagnosed between 2002 and 2019.

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Objectives: To compare the exposure data generated by using the Canadian job-exposure matrix (CANJEM) with data generated by expert assessment, for jobs held by women.

Methods: We selected 69 occupational agents that had been assessed by experts for each of 3403 jobs held by 998 women in a population-based case-control study of lung cancer. We then assessed the same agents among the same jobs by linking their occupation codes to CANJEM and thereby derived probability of exposure to each of the agents in each job.

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Article Synopsis
  • - This text discusses a patient with pericardial amyloidosis linked to lymphoplasmacytic lymphoma, experiencing ongoing shortness of breath and coughing.
  • - It emphasizes the diverse ways cardiac amyloidosis can present in patients, showcasing that symptoms can differ widely.
  • - Additionally, it points out the uncommon but significant instances of light-chain and heavy-chain amyloidosis affecting the pericardium, which is the fibrous sac surrounding the heart.
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Objective: Incompetent perforator veins (IPVs) contribute to venous pathology and are surgically treated based on hemodynamic measurements, size, and the CEAP (Clinical, Etiological, Anatomical, and Pathophysiological) classification. The objective of the present study was to systematically review and synthesize the current literature regarding the surgical management of IPVs, including open ligation, subfascial endoscopic perforator surgery (SEPS), endovascular laser ablation, ultrasound-guided sclerotherapy, and radiofrequency ablation.

Methods: English-language literature reported before November 2021 was reviewed from the PubMed, EMBASE, and MEDLINE databases for primary studies reporting safety and efficacy outcomes in the surgical treatment of IPVs.

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Background: The use of mediated learning in cognitive training has been shown to be effective in enhancing students' cognitive development. Nonetheless, its effects on language development are less explored.

Aims: This study examined the effects of an early cognitive intervention (Think Bright program) in enhancing the cognitive and language development of Hong Kong preschoolers with developmental delay.

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