Publications by authors named "Roger Sik Yin Foo"

Background & Aims: Plant sterols (PS) have been shown to lower blood lipid-lipoproteins concentrations and may serve as a potential functional ingredient for cardiovascular disease (CVD) risk management. However, there are limited studies examining this effect in individuals with metabolic syndrome (MetS). The aim of this study was to evaluate the effects of PS-enriched food consumption as part of a healthy dietary pattern (HDP) on blood pressure and endothelial function in Singaporean adults with MetS.

View Article and Find Full Text PDF
Article Synopsis
  • - The study aimed to determine how long it takes for intensive lipid-lowering therapy to reduce major adverse cardiovascular events (MACE) in people with established cardiovascular disease (CVD), particularly before and after 2010 when new treatments like PCSK9 inhibitors and ezetimibe were introduced.
  • - Researchers reviewed seven randomized controlled trials involving over 92,000 adults and found that it takes about 19.6 months of intensive therapy to prevent one MACE per 100 patients, with variations based on the treatment used.
  • - Results showed that before 2010, high-intensity statin therapy required a TTB of 15.2 months, while PCSK9i and ezetimibe therapies had longer TTB
View Article and Find Full Text PDF
Article Synopsis
  • * Researchers utilized a fine-mapping approach blending data from a diverse genome-wide association study and expression analysis from different ancestry groups to identify 14 potential causal genes linked to AF.
  • * By silencing a major AF-related gene using CRISPR in heart cells, the study revealed disruptions in pathways crucial for heart tissue and conduction system development.
View Article and Find Full Text PDF
Article Synopsis
  • Hepatocellular carcinoma (HCC) is a dangerous type of cancer that is different inside each tumor, making it hard to treat.
  • Researchers studied over 600 samples from 123 patients to understand how this cancer develops and progresses.
  • They discovered that the most aggressive cells in a tumor are the best way to predict how well a patient will do, not just by looking at how different the tumor cells are from each other.
View Article and Find Full Text PDF

Background & Aims: Lifestyle and environmental-related exposures are important risk factors for hepatocellular carcinoma (HCC), suggesting that epigenetic dysregulation significantly underpins HCC. We profiled 30 surgically resected tumours and the matched adjacent normal tissues to understand the aberrant epigenetic events associated with HCC.

Methods: We identified tumour differential enhancers and the associated genes by analysing H3K27 acetylation (H3K27ac) chromatin immunoprecipitation sequencing (ChIP-seq) and Hi-C/HiChIP data from the resected tumour samples of 30 patients with early-stage HCC.

View Article and Find Full Text PDF

Objective: Gastric cancer (GC) is a leading cause of cancer mortality, with being the second most frequently mutated driver gene in GC. We sought to decipher -specific GC regulatory networks and examine therapeutic vulnerabilities arising from loss.

Design: Genomic profiling of GC patients including a Singapore cohort (>200 patients) was performed to derive mutational signatures of inactivation across molecular subtypes.

View Article and Find Full Text PDF

Background And Aims: Single nucleotide polymorphism rs6903956 has been identified as one of the genetic risk factors for coronary artery disease (CAD). However, rs6903956 lies in a non-coding locus on chromosome 6p24.1.

View Article and Find Full Text PDF

Objective: Gastric cancer (GC) comprises multiple molecular subtypes. Recent studies have highlighted mesenchymal-subtype GC (Mes-GC) as a clinically aggressive subtype with few treatment options. Combining multiple studies, we derived and applied a consensus Mes-GC classifier to define the Mes-GC enhancer landscape revealing disease vulnerabilities.

View Article and Find Full Text PDF

Objective: Adrenal vein sampling (AVS) is recommended to subtype primary aldosteronism, but it is technically challenging. We compared 11C-Metomidate-PET-computed tomography (PET-CT) and AVS for subtyping of primary aldosteronism.

Methods: Patients with confirmed primary aldosteronism underwent both AVS and 11C-Metomidate PET-CT (post-dexamethasone).

View Article and Find Full Text PDF

Vascular dementia (VaD) is the second most common cause of dementia worldwide. The increasing contribution of lifestyle-associated risk factors to VaD has pointed towards gene-environment interactions (i.e.

View Article and Find Full Text PDF

Doxorubicin is an anthracycline widely used for the treatment of various cancers; however, the drug has a common deleterious side effect, namely a dose-dependent cardiotoxicity. Doxorubicin treatment increases the generation of reactive oxygen species, which leads to oxidative stress in the cardiac cells and ultimately DNA damage and cell death. The most common DNA lesion produced by oxidative stress is 7,8-dihydro-8-oxoguanine (8-oxoguanine), and the enzyme responsible for its repair is the 8-oxoguanine DNA glycosylase (OGG1), a base excision repair enzyme.

View Article and Find Full Text PDF
Article Synopsis
  • * A study involving 67 patients with hepatocellular carcinoma (HCC) revealed that while genetic variations remained stable across different cancer stages, phenotypic variations quickly increased, especially in stage II patients, often showing multiple transcriptomic subtypes within a single tumor.
  • * The findings indicate that phenotypic ITH is a critical factor for predicting patient outcomes and explains why single-target therapies are often ineffective in HCC, stressing the need for more comprehensive studies on phenotypic evolution in various cancers.
View Article and Find Full Text PDF

Intermittent fasting (IF) remains the most effective intervention to achieve robust anti-aging effects and attenuation of age-related diseases in various species. Epigenetic modifications mediate the biological effects of several environmental factors on gene expression; however, no information is available on the effects of IF on the epigenome. Here, we first found that IF for 3 months caused modulation of H3K9 trimethylation (H3K9me) in the cerebellum, which in turn orchestrated a plethora of transcriptomic changes involved in robust metabolic switching processes commonly observed during IF.

View Article and Find Full Text PDF

Background: Enhancers are distal cis-regulatory elements required for cell-specific gene expression and cell fate determination. In cancer, enhancer variation has been proposed as a major cause of inter-patient heterogeneity-however, most predicted enhancer regions remain to be functionally tested.

Methods: We analyzed 132 epigenomic histone modification profiles of 18 primary gastric cancer (GC) samples, 18 normal gastric tissues, and 28 GC cell lines using Nano-ChIP-seq technology.

View Article and Find Full Text PDF

Much has been written about gene modifying technologies (GMTs), with a particularly strong focus on human germline genome editing (HGGE) sparked by its unprecedented clinical research application in 2018, shocking the scientific community. This paper applies political, ethical, and social lenses to aspects of HGGE to uncover previously underexplored considerations that are important to reflect on in global discussions. By exploring 4 areas-(1) just distribution of HGGE benefits through a realist lens; (2) HGGE through a national interest lens; (3) "broad societal consensus" through a structural injustice lens; and (4) HGGE through a scientific trustworthiness lens-a broader perspective is offered, which ultimately aims to enrich further debates and inform well-considered solutions for developments in this field.

View Article and Find Full Text PDF

Aims: Direct cardiac reprogramming represents an attractive way to reversing heart damage caused by myocardial infarction because it removes fibroblasts, while also generating new functional cardiomyocytes. Yet, the main hurdle for bringing this technique to the clinic is the lack of efficacy with current reprogramming protocols. Here, we describe our unexpected discovery that DMSO is capable of significantly augmenting direct cardiac reprogramming in vitro.

View Article and Find Full Text PDF
Article Synopsis
  • The study investigates how altering the biomechanical environment of zebrafish embryonic hearts affects their development and function, focusing on the use of a drug called BDM over 72 hours.
  • Results showed that treated hearts had significantly reduced contractility, abnormal shapes (like disrupted cardiac looping), and poor function, alongside changes in gene expression related to inflammation and tissue remodeling.
  • The findings suggest that prolonged disruption of biomechanical stimuli leads to serious developmental issues and provides insights into the specific genes involved in these effects.
View Article and Find Full Text PDF

Background: The consumption of wolfberry (Lycium barbarum), a rich source of carotenoids and bioactive polysaccharides, may serve as a potential dietary strategy for cardiovascular disease (CVD) risk management although limited studies examined its effects as whole fruits.

Objectives: To investigate the impact of wolfberry consumption as part of a healthy dietary pattern on vascular health-related outcomes and classical CVD risk factors in middle-aged and older adults in Singapore.

Methods: This is a 16-week, parallel design, randomized controlled trial.

View Article and Find Full Text PDF

How diet is related with cognition and health has not been systematically examined in Asians whose eating habits are very different from their counterparts in the West and the biological mechanisms underlying such links are not well known yet. The diet and healthy aging (DaHA) study is a community-based longitudinal study conducted to examine the role of diet and nutrition in promoting cognitive, emotional, and physical health among community-living elderly Singaporeans. The first wave of DaHA, conducted from 2011 to 2017, provided detailed information on diet and baseline cognitive function and health from 1010 community-living elderly in Singapore.

View Article and Find Full Text PDF

Recent reporting found that a number of scientists internationally knew about the experiment resulting in the birth of the first gene-edited babies well before the news broke. Because scientists have a responsibility to reveal such activities, an international governance mechanism for reporting unethical gene editing experiments should be established.

View Article and Find Full Text PDF