Publications by authors named "Ragavandran Ranganathan"

Purpose: Spinal chordomas are aggressive tumors that rarely occur in the pediatric population. Demographics and post-treatment outcomes in this select group of patients is poorly studied. We hence aimed to analyze the clinical characteristics, demographics, and survival outcomes of pediatric patients with spinal chordomas, in contrast to the adult population.

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Background: Health technology assessment (HTA) is a valuable tool for informing the efficient allocation of resources in healthcare. However, the resource-intensive nature of HTA can limit its application, especially in low-resource settings. Adapting HTA processes by assessing the available international evidence offers a pragmatic approach to provide evidence for decision-making where resources are constrained.

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Proteases are promising biomarkers for cancer early detection. Their enzymatic activity against peptide substrates allows for their straightforward detection using low-cost tests. However, the complexity of the human proteome makes it challenging to develop sensitive and selective tests against a specific protease biomarker.

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Nanoparticles have been of significant interest in various biomedical domains such as drug delivery, gene delivery, cytotoxicity analysis, and imaging. Despite the synthesis of a variety of nanoparticles, their cellular uptake efficiency remains a substantial obstacle, with only a small fraction of delivered nanoparticles (NPs) have been reported to traverse the cell membrane within 24 h. Consequently, higher doses are often necessitated, leading to increased toxicity concerns.

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Fetuin-A, also known as alpha-2-Heremans-Schmid-glycoprotein (Ahsg), is a multifunctional molecule with diverse roles in biological processes such as mineralization, tumor growth, and inflammation. This review explores the involvement of Ahsg in various cancers, including liver, breast, prostate, colorectal, brain, osteosarcoma, and lung cancers. In many cancer types, Ahsg promotes tumor growth, invasion, and metastasis through various mechanisms, including cellular adhesion, spreading, chemotaxis, and modulation of cell-growth signaling pathways.

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  • Cytokines play a crucial role in childhood diseases' inflammation, but testing is mostly confined to research, and there are no standard reference ranges for healthy children.
  • The study aimed to create an accessible dataset of cytokine levels in the airways and blood of healthy children aged 1 to 16, analyzing how these levels change with age.
  • The researchers identified a core set of cytokines that can help evaluate inflammation and address the need for reference ranges to improve disease diagnosis and monitoring treatment effects.
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Caspase-1 is a sought-after therapeutic target for inflammatory conditions due to its role in activation and release of pro-inflammatory cytokines, but there has been little success getting drugs into the clinic. We have previously shown triaminopyrimidines such as CK-1-41 are potent, reversible small molecule inhibitors of caspase-1, likely binding in an allosteric site within the enzyme. A series of analogs of CK-1-41 were synthesized and tested against caspase-1 to develop a more robust structure-activity relationship profile.

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  • Craniosynostosis (CS) is a condition where cranial sutures fuse prematurely, affecting 1 in 2,000-2,500 children, and can be categorized as syndromic or nonsyndromic based on the affected sutures.
  • An 8-year-old girl displayed signs of CS, and genetic testing identified a mutation linked to craniosynostosis-4, while her dental evaluation revealed unerupted teeth and cavities.
  • Treatment involved addressing dental issues, and the significance of CS includes its genetic basis, often involving new mutations, with associated complications like facial changes and developmental delays.
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  • The text discusses a new framework called BioM3 that allows for the design of proteins using natural language prompts, integrating text and protein representation in a novel way.
  • This framework operates in three stages: aligning protein and text representations, refining text embeddings, and generating protein sequences using a specific model.
  • BioM3 has shown impressive results in various protein-related tasks and successfully generates proteins with characteristics similar to naturally occurring ones, validated through experimental tests.
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  • The study was a retrospective cohort analysis aimed at assessing the impact of gabapentinoids on opioid use after anterior lumbar interbody fusion surgery.
  • While gabapentinoid treatment led to a slight 2.9% reduction in daily opioid consumption, it paradoxically increased the total duration and amount of opioids prescribed significantly (37.1% and 41.7%, respectively).
  • Additionally, the use of gabapentinoids was linked to higher risks of pain-related readmissions and potential drug abuse.
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  • This article is part of a series focused on different elements of biomedical research, including planning and interpretation.
  • It highlights various tools and resources specifically designed for health and biomedical researchers.
  • The aim is to aid researchers in effectively conducting their studies.
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Insects rely on odorant receptors (ORs) to detect and respond to volatile environmental cues, so the ORs are attracting increasing interest as potential targets for pest control. However, experimental analysis of their structures and functions faces significant challenges. Computational methods such as template-based modeling (TBM) and AlphaFold3 (AF3) could facilitate the structural characterisation of ORs.

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Background: Respiratory diseases are a common cause of morbidity and hospitalization for children. Despite this, treatment options are limited and are often ineffective. The development of curative or disease-modifying treatments for children relies on a better understanding of underlying immunity in the early airway.

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Objectives: Dysregulation of Epstein-Barr virus (EBV)-specific cellular immunity has been hypothesised as one of the contributing factors in the pathogenesis of systemic lupus erythematosus (SLE). Lupus nephritis is a major risk factor for overall morbidity in SLE. Immune-based strategies directed to EBV have been proposed as potential therapeutic strategy for SLE and lupus nephritis.

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Oversensing of extra-cardiac noise may inhibit delivery of subcutaneous cardiac implantable defibrillator (S-ICD) therapy. We report a case of diaphragmatic tetany resulting in the inhibition of S-ICD therapy at the time of defibrillator testing without the use of muscle relaxants. Clinicians should be aware of this phenomenon.

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Background: Pregnancies in women on dialysis remain rare but are increasing in numbers.

Methods: Retrospective observational audit of seven cases from 1977 to 2022 of all women who conceived prior to dialysis or conceived whilst on dialysis.

Results: Of a total of seven women, three were referred from regional centres in Australia, between the 6 and 20 weeks of gestation, generally without any opportunity for pre-conception counselling.

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Introduction: Spinal low-grade gliomas (sLGGs) are a group of tumors that arise from glial cells in the spinal cord. Current evidence supporting the use of adjuvant radiotherapy for the management of sLGG is lacking. We hence aimed to compare overall survival rates in patients receiving surgery alone with those receiving surgery with adjuvant radiotherapy.

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Objective: To evaluate the association of CPR quality metrics with survival outcomes in children with and without congenital heart disease experiencing in-hospital cardiac arrest.

Design: Retrospective cohort study of data from the Pediatric Resuscitation Quality (pediRES-Q) Collaborative.

Setting: 28 participating sites.

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Helicobacter pylori cells undergo chemotaxis toward several small molecules, called chemo-attractants, including urea produced by the epithelial cells of the stomach. The biophysical mechanisms of chemotaxis are not well understood in H. pylori.

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Background: The ability to relearn a lost skill is critical to motor recovery after a stroke. Previous studies indicate that stroke typically affects the processes underlying motor control and execution but not the learning of those skills. However, these studies could be confounded by the presence of significant motor impairments.

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  • Heavy metal ions like thallium(I) and lead(II) are harmful environmental pollutants that pose risks to human health and ecosystems.
  • The study developed innovative biosensors and paper-based assays using aptamers and an intercalating agent (berberine) for detecting these toxic metals, achieving impressive sensitivity with detection limits as low as 1.1 nM for Tl(I) and 1.6 nM for Pb(II).
  • The new assays were able to effectively identify these metal ions even in contaminated river water samples, highlighting their potential for fast and cost-efficient screening methods.
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