Publications by authors named "S-G Tan"

Blood-based biomarkers have been revolutionizing the detection, diagnosis and screening of Alzheimer's disease. Specifically, phosphorylated-tau variants (p-tau, p-tau and p-tau) are promising biomarkers for identifying Alzheimer's disease pathology. Antibody-based assays such as single molecule arrays immunoassays are powerful tools to investigate pathological changes indicated by blood-based biomarkers and have been studied extensively in the Alzheimer's disease research field.

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Background: Covered stent correction for a sinus venosus atrial septal defect (SVASD) was first performed in 2009. This innovative approach was initially viewed as experimental and was reserved for highly selected patients with unusual anatomic variants. In 2016, increasing numbers of procedures began to be performed, and in several centers, it is now offered as a standard of care option alongside surgical repair.

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Solid tumors vary by the immunogenic potential of the tumor microenvironment (TME) and the likelihood of response to immunotherapy. The emerging literature has identified key immune cell populations that significantly impact immune activation or suppression within the TME. This study investigated candidate T-cell populations and their differential infiltration within different tumor types as estimated from mRNA co-expression levels of the corresponding cellular markers.

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Radiotherapy showed synergy with immunotherapy, yet the comparative effectiveness of combining immunotherapy (iRT) or chemotherapy (CRT) after platinum therapy failure in advanced non-small cell lung cancer (NSCLC) remains unexplored. We analyzed 163 patients (iRT:  = 120 vs. CRT:  = 43) eligible for combination radiotherapy.

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  • BamA is a crucial part of the β-barrel assembly machine (BAM) that helps insert proteins into the outer membrane of Gram-negative bacteria like E. coli.
  • Researchers used in vitro selection techniques to find peptide macrocycles that can disrupt BamA's function by binding to different conformational states, specifically Peptide Targeting BamA-1 (PTB1) and Peptide Targeting BamA-2 (PTB2).
  • These findings are important for developing new antibiotics targeting BamA and could also be applied to discover modulators for other similar proteins in the future.
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Underrepresented populations' participation in clinical trials remains limited, and the potential impact of genomic variants on drug metabolism remains elusive. This study aimed to assess the pharmacokinetics (PK) and pharmacogenomics (PGx) of ribociclib in self-identified Black women with hormone receptor-positive (HR+)/human epidermal growth factor receptor 2-negative (HER2) advanced breast cancer. LEANORA (NCT04657679) was a prospective, observational, multicenter cohort study involving 14 Black women.

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  • * Data from 670 patients revealed that while IVT may improve some outcomes, such as higher chances of achieving a modified Rankin Scale score of 0-2 in univariable analysis, this benefit was not consistently observed in more rigorous multivariable analyses.
  • * Overall, the findings suggest that adjunctive IVT may not significantly enhance clinical outcomes or safety compared to MT alone for this patient population.
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  • The study investigates the relationship between body mass index (BMI) and Parkinson's disease (PD) using a method called Mendelian randomization to determine if higher genetically predicted BMI is linked to a lower incidence of PD.
  • Researchers analyzed genetic data from large groups of individuals, including over 800,000 for BMI and nearly 29,000 for PD, focusing on factors like age, disease duration, and gender to examine the associations.
  • Results indicated an inverse relationship between genetically predicted BMI and PD, particularly among younger participants and women, suggesting that lower BMI may be associated with a higher risk of developing Parkinson's disease.
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  • Limited evidence exists about how much wheezing in young children is linked to respiratory syncytial virus (RSV) infections in their early years.
  • A study tracked 2-year-olds in 8 countries until they turned six, assessing wheeze occurrences and calculating the population attributable risk (PAR) for those with previous RSV lower respiratory tract infections.
  • Results showed that children with RSV-LRTI had significantly higher incidences of wheezing, suggesting that preventing RSV infections in early childhood could reduce wheezing episodes in later years.
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  • Researchers sequenced the genomes of 822 families with suspected rare monogenic diseases that were previously undiagnosed through standard genetic tests, including exome sequencing.
  • They found that genome sequencing provided a molecular diagnosis for 29.3% of the initial families, with 8.2% requiring genome sequencing to identify variants that exome sequencing missed.
  • The study showed that both research and clinical approaches could benefit from genome sequencing, demonstrating its importance in uncovering previously undetected genetic variations.
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Chronic kidney disease (CKD) is a major contributor to morbidity and mortality in sickle cell disease (SCD). Anemia, induced by chronic persistent hemolysis, is associated with the progressive deterioration of renal health, resulting in CKD. Moreover, patients with SCD experience acute kidney injury (AKI), a risk factor for CKD, often during vaso-occlusive crisis associated with acute intravascular hemolysis.

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B-cell maturation antigen (BCMA)-targeting therapeutics have dramatically improved outcomes in relapsed/refractory multiple myeloma (RRMM). However, whether the mechanisms of resistance between these therapies are shared and how the identification of such mechanisms before therapy initiation could refine clinical decision-making remains undefined. We analyzed outcomes for 72 RRMM patients treated with teclistamab, a CD3 × BCMA bispecific antibody, 42% (30/72) of whom had prior BCMA-directed therapy exposure.

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Maintaining wound moisture and monitoring of infection are crucial aspects of chronic wound treatment. The development of a pH-sensitive functional hydrogel dressing is an effective approach to monitor, protect, and facilitate wound healing. In this study, beet red pigment extract (BRPE) served as a native and efficient pH indicator by being grafted into silane-modified bacterial nanocellulose (BNC) to prepare a pH-sensitive wound hydrogel dressing (S-g-BNC/BRPE).

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  • The global population is aging rapidly, leading to a need for effective methods to promote physical activity among older adults, with active video games (AVGs) being explored as a potential solution.
  • A review of 24 randomized controlled trials involving 1,428 older adults showed that AVGs significantly improve muscular strength and cardiorespiratory fitness, although they don’t significantly affect body composition or flexibility.
  • The positive effects of AVGs were more pronounced when sessions lasted 60 minutes or more and when the training duration exceeded 12 weeks, suggesting that longer and more intense engagement yields better fitness outcomes.
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Background: A major obstacle faced by families with rare diseases is obtaining a genetic diagnosis. The average "diagnostic odyssey" lasts over five years and causal variants are identified in under 50%, even when capturing variants genome-wide. To aid in the interpretation and prioritization of the vast number of variants detected, computational methods are proliferating.

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Outcomes for patients with relapsed/refractory multiple myeloma (R/RMM) have dramatically improved after the development and now growing utilization of B-cell maturation antigen-targeted chimeric antigen receptor (CAR) T-cell therapy and bispecific antibody (BsAb) therapy. However, health care utilization as a quality-of-life metric in these growing populations has not been thoroughly evaluated. We performed a retrospective cohort study evaluating the frequency and cause of unscheduled health care interactions (UHIs) among patients with R/RMM responding to B-cell maturation antigen-targeted BsAb and CAR T-cell therapies (N = 46).

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Increasing evidence suggests a considerable role of pre-movement beta bursts for motor control and its impairment in Parkinson's disease. However, whether beta bursts occur during precise and prolonged movements and if they affect fine motor control remains unclear. To investigate the role of within-movement beta bursts for fine motor control, we here combine invasive electrophysiological recordings and clinical deep brain stimulation in the subthalamic nucleus in 19 patients with Parkinson's disease performing a context-varying task that comprised template-guided and free spiral drawing.

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Background: Tofacitinib is an oral Janus kinase inhibitor for the treatment of ulcerative colitis (UC). This analysis assessed the impact of cigarette smoking on tofacitinib efficacy and safety in the UC clinical program.

Methods: Efficacy endpoints and adverse events (AEs) were evaluated by smoking status (ever smokers [current and ex-smokers] and never smokers) in the phase (P)2 induction study (baseline demographics and safety only), P3 studies (OCTAVE Induction 1&2, OCTAVE Sustain, OCTAVE Open), and P3/4b RIVETING study.

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The emergence and mutation of pathogenic viruses have been occurring at an unprecedented rate in recent decades. The coronavirus disease 2019 (COVID-19) pandemic caused by severe acute respiratory syndrome coronavirus 2 (SARS-CoV-2) has developed into a global public health crisis due to extensive viral transmission. In situ RNA mapping has revealed angiotensin-converting enzyme 2 (ACE2) expression to be highest in the nose and lower in the lung, pointing to nasal susceptibility as a predominant route for infection and the cause of subsequent pulmonary effects.

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Over 75% of malaria-attributable deaths occur in children under the age of 5 years. However, the first malaria vaccine recommended by the World Health Organization (WHO) for pediatric use, RTS,S/AS01 (Mosquirix), has modest efficacy. Complementary strategies, including monoclonal antibodies, will be important in efforts to eradicate malaria.

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The limited availability of cytokines in solid tumours hinders maintenance of the antitumour activity of chimeric antigen receptor (CAR) T cells. Cytokine receptor signalling pathways in CAR T cells can be activated by transgenic expression or injection of cytokines in the tumour, or by engineering the activation of cognate cytokine receptors. However, these strategies are constrained by toxicity arising from the activation of bystander cells, by the suboptimal biodistribution of the cytokines and by downregulation of the cognate receptor.

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Background: Recent clinical trials have demonstrated that sodium-glucose cotransporter 2 inhibitors (SGLT2i), which were previously only indicated in treatment of type 2 diabetes mellitus (T2DM), can markedly reduce heart failure hospitalisation (HFH), with less striking potential reductions in acute coronary syndromes and cardiac arrhythmias. To evaluate the impact of SGLT2i on cardiovascular outcomes in real-world practice, we performed a retrospective cohort analysis on South Australian (SA) data.

Methods: A total of 842 individuals with T2DM receiving SGLT2i were identified from SA public hospitals between 2011 and 2019.

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