Publications by authors named "Chan I"

Article Synopsis
  • Fibrosis contributes to serious damage in organs, but treatments targeting specific activators have often failed, leading researchers to focus on the leukemia inhibitory factor receptor (LIFR) as a key player in fibrotic diseases like idiopathic pulmonary fibrosis (IPF).
  • In IPF, myofibroblasts highly express LIF, and fibroblasts in key fibrotic areas coexpress LIF and LIFR, demonstrating LIFR's role in amplifying signals from other fibrotic drivers like TGFβ1, IL-4, and IL-13.
  • Blocking LIFR reduces the activation of profibrotic genes and highlights LIFR's function as a master amplifier of harmful signals
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  • Bullous emphysema is a chronic lung disease marked by the presence of large air spaces called bullae, with giant bullae being particularly significant and often requiring surgical removal known as bullectomy.
  • A 35-year-old man with a history of COVID-19 experienced chest pain and difficulty breathing, leading to the discovery of a giant bulla in his left lung on imaging scans.
  • Remarkably, after monitoring over several months, the giant bulla spontaneously resolved without surgery, suggesting that infectious processes may play a role in this phenomenon, highlighting the importance of careful imaging and follow-up in similar cases.
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Aim: To investigate the long-term quality of life and surgical outcome of female patients with congenital adrenal hyperplasia (CAH).

Methods: Questionnaires for health-related quality of life (HRQoL) outcome (WHO-5, SF-36), lower urinary tract symptoms (ICIQ-FLUTS) and sexual outcome (ICIQ-FLUTSsex) were administered to adult CAH patients. Paediatric CAH patients and their parents were invited to complete WHO-5, PedsQL-4.

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  • Sleep deprivation is linked to significant health risks, including an increased likelihood of influenza, particularly following acute sleep deprivation events (ASDEs) identified in a large population study.
  • The study used data from Fitbit users to analyze sleep patterns and health outcomes, revealing a correlation between political/non-political events and instances of decreased sleep.
  • Genetic factors related to sleep duration were found to influence both the severity of sleep deprivation and the risk of subsequent health issues, emphasizing the need for awareness of health impacts during major national events.
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Background: Mental health and substance use disorders are common among people living with HIV and are associated with high-risk sexual behaviors, such as unprotected sex and multiple sexual partners, but Asia-Pacific data are limited.

Methods: Adult PLHIV in care at five Asia-Pacific HIV clinics were enrolled at routine clinic visits between July 2019 and June 2020. Depression, substance use, sexual practice and socio-demographic data were collected using PHQ-9, ASSIST, and a study-specific questionnaire.

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Introduction: The study aims to predict tooth extraction decision based on four machine learning methods and analyze the feature contribution, so as to shed light on the important basis for experts of tooth extraction planning, providing reference for orthodontic treatment planning.

Methods: This study collected clinical information of 192 patients with malocclusion diagnosis and treatment plans. This study used four machine learning strategies, including decision tree, random forest, support vector machine (SVM) and multilayer perceptron (MLP) to predict orthodontic extraction decisions on clinical examination data acquired during initial consultant containing Angle classification, skeletal classification, maxillary and mandibular crowding, overjet, overbite, upper and lower incisor inclination, vertical growth pattern, lateral facial profile.

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Purpose: Mutations in hematopoietic progenitor cells accumulate with age leading to clonal expansion, termed clonal hematopoiesis (CH). CH in the general population is associated with hematopoietic neoplasms and reduced overall survival (OS), predominantly through cardiovascular adverse events (CVAE). Because androgen receptor pathway inhibitors (ARPI) used in metastatic castration-resistant prostate cancer (mCRPC) are also associated with CVAEs and because CH negatively impacted survival in an advanced solid tumor cohort, we hypothesized that CH in mCRPC may be associated with increased CVAEs and inferior survival.

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Purpose: The advent of new therapeutic modalities highlighted deficiencies in the traditional maximum tolerated dose approach for oncology drug dose selection and prompted the Food and Drug Administration (FDA)'s initiative, which suggests that sponsors take a holistic approach, including efficacy, safety, and pharmacokinetic (PK) and pharmacodynamic data, in conjunction with integrated exposure-response (ER) analyses. However, this method comes with an inherent challenge of the collation of the multisource data. To address this issue, an ER-based clinical utility score (CUS) framework, combining benefit and risk into a single measurement, was developed.

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Background: Risk factors including smoking, alcohol intake, physical activity (PA), and sleep patterns have been associated with cancer risk. Clonal hematopoiesis (CH), including mosaic chromosomal alterations and clonal hematopoiesis of indeterminate potential, is linked to increased hematopoietic cancer risk and could be used as common preclinical intermediates for the better understanding of associations of risk factors with rare hematologic malignancies.

Methods: We analyzed cross-sectional data from 478,513 UK Biobank participants without hematologic malignancies using multivariable-adjusted analyses to assess the associations between lifestyle factors and CH types.

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Article Synopsis
  • Family caregivers (FCs) are crucial for home-based end-of-life care, but their experiences in this role are not well understood.
  • The integrated community end-of-life support team (ICEST) model in Hong Kong was evaluated to see how it affects FCs, particularly spouses and adult children, regarding caregiving strain, psychological distress, and support.
  • The study found that ICEST effectively reduced caregiving strain and depression across all FCs, though spouses reported more negative perceptions and adult children had more intimacy with patients, highlighting the need for tailored interventions for both groups.
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Introduction:  Intra-abdominal testis (IAT) remains a challenging and controversial subset within the management of cryptorchidism. While Fowler-Stephens orchidopexy (FSO) is still being advocated as the gold standard for the treatment of this entity, there is new and conflicting evidence on the comparative outcomes between single- or two-stage laparoscopic FSO (LFSO). The aim of the study is to investigate whether staging has benefits in children receiving LFSO.

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Many toxic animals display bright colour patterns to warn predators about their toxicity. This sometimes leads other sympatric palatable organisms to evolve mimetic colour patterns to also evade predation. These mimics, however, are often imperfect, and it is unclear how much their colour patterns can vary away from the model before they become ineffective.

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Background: Advanced heart failure (AHF) secondary to myxomatous mitral valve disease (MMVD) in dogs has unclear predictive variables and survival time.

Methods: This retrospective study included 38 dogs with AHF and 38 with stable congestive heart failure (CHF), both due to MMVD. Predictive variables for AHF were analysed, and survival times were calculated using logistic regression and the Kaplan-Meier method.

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Purpose: This study examines the diagnostic accuracy of brain perfusion SPECT for mild traumatic brain injury (mTBI).

Patients And Methods: A systematic review and meta-analysis was performed according to PRISMA guidelines (PROSPERO: CRD42023484636). Five databases were searched for studies evaluating brain perfusion SPECT in adult patients with mTBI (GCS 13-15).

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How does the brain translate sensory information into complex behaviors? With relatively small neuronal numbers, readable behavioral outputs, and an unparalleled genetic toolkit, the mushroom body (MB) offers an excellent model to address this question in the context of associative learning and memory. Recent technological breakthroughs, such as the freshly completed full-brain connectome, multiomics approaches, CRISPR-mediated gene editing, and machine learning techniques, led to major advancements in our understanding of the MB circuit at the molecular, structural, physiological, and functional levels. Despite significant progress in individual MB areas, the field still faces the fundamental challenge of resolving how these different levels combine and interact to ultimately control the behavior of an individual fly.

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An extensive literature shows that race information can impact cognitive performance. Two key findings include an attentional bias to Black racial cues in U.S.

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Exposure to cancer therapies is associated with an increased risk of clonal hematopoiesis (CH). The objective of our study was to investigate the genesis and evolution of CH after cancer therapy. In this prospective study, we undertook error-corrected duplex DNA sequencing in blood samples collected before and at 2 time points after chemoradiation in patients with esophageal or lung cancer recruited from 2013 to 2018.

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Breast cancer metastases exhibit many different genetic alterations, including copy number amplifications (CNA). CNA are genetic alterations that are increasingly becoming relevant to breast oncology clinical practice. Here we identify CNA in metastatic breast tumor samples using publicly available datasets and characterize their expression and function using a metastatic mouse model of breast cancer.

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Background: Thoracoscopy, which has an increasing role in the treatment of indexed neonatal surgical conditions, requires adequate training. To support this, the current study aimed to evaluate the feasibility and effectiveness of using live rabbit models in neonatal thoracoscopic skills training among paediatric surgeons.

Methods: Following didactic lectures and demonstrations, the participants were given hands-on opportunities to perform thoracoscopic procedures.

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This article examines the leadership challenges of prison healthcare, specifically focusing on the ageing inmate population. It highlights the distinct health burdens faced by this demographic, including higher disease prevalence and an accelerated ageing process. The concept of prison activities of daily living is central to addressing these challenges, emphasizing the need to tailor health assessments and care plans to the unique prisoner-environment interactions.

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Article Synopsis
  • Metastatic disease, a major cause of death in advanced breast cancer, involves tumor cells spreading from their original site to distant organs, highlighting the importance of studying these processes.
  • Researchers have developed a new murine breast tumor cell line, NT2.5-LM, that shows a much faster spread of metastases after implantation, making it a valuable tool for understanding cancer progression and treatment.
  • The NT2.5-LM cell line displays characteristics of enhanced metastatic potential, responds well to HER2-targeted therapies, and offers advantages over previous models, enabling better exploration of therapeutic strategies and mechanisms of metastasis.
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  • The study examines the roles of PD-L1 expression and tumor mutational burden (TMB) in various metastatic sites of breast cancer, focusing on differences in the tumor microenvironment (TME).
  • Analysis of 3076 patient biopsies revealed that liver metastases (LvMs) have high TMB but lower PD-L1 expression and adaptive immune cell infiltration compared to primary breast tumors (BrTs).
  • The findings suggest that the metastatic site affects immune characteristics and biomarker expression, indicating the need for tailored approaches in immune checkpoint inhibitor treatments based on biopsy locations.
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  • The Inspiration4 mission was the first all-civilian orbital flight that explored how short-duration spaceflight affects human physiology, using a multi-omic approach to study various challenges like microgravity, immune response, and radiation exposure.
  • Researchers collected dried blood samples before, during, and after the flight to analyze DNA and telomere lengths, track genomic stability, and monitor immune adaptations using advanced bioinformatics.
  • Findings revealed that while telomeres lengthened during the flight and then shortened after return, there were notable changes in immune cell gene expression that persisted for months, providing important insights for future space missions and astronaut health.
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We present an integrated single-cell RNA sequencing atlas of the primary breast tumor microenvironment (TME) containing 236,363 cells from 119 biopsy samples across eight datasets. In this study, we leverage this resource for multiple analyses of immune and cancer epithelial cell heterogeneity. We define natural killer (NK) cell heterogeneity through six subsets in the breast TME.

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Background: Previous evidence informed by the toxic stress model suggests that higher cortisol causes anxiety and major depression, but clinical success is lacking. To clarify the role of cortisol, we used Mendelian randomization to estimate its associations with anxiety, major depression, and neuroticism, leveraging the largest available genome-wide association studies including from the Psychiatric Genomics Consortium, the UK Biobank, and FinnGen.

Methods: After meta-analyzing 2 genome-wide association studies on morning plasma cortisol ( = 32,981), we selected single nucleotide polymorphisms (SNPs) at < 5 × 10 and < 0.

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