Publications by authors named "Subramaniam A"

The eastern equatorial Atlantic hosts a productive marine ecosystem that depends on upward supply of nitrate, the primary limiting nutrient in this region. The annual productivity peak, indicated by elevated surface chlorophyll levels, occurs in the Northern Hemisphere summer, roughly coinciding with strengthened easterly winds. For enhanced productivity in the equatorial Atlantic, nitrate-rich water must rise into the turbulent layer above the Equatorial Undercurrent.

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Objective: To evaluate the effect of administering postpartum heparin-based pharmacologic thromboprophylaxis on the incidence of postpartum venous thromboembolism (VTE) and complications.

Methods: This was a multicenter retrospective cohort study of all individuals delivering at more than 20 weeks of gestation at four U.S.

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: The COVID-19 pandemic prompted unprecedented vaccine development efforts against SARS-CoV-2. India, which was one of the countries most impacted by COVID-19, developed its indigenous vaccine in addition to utilizing the ones developed by other countries. While antibody levels and neutralizing antibody titres are considered initial correlates of immune protection, long-term protection from the pathogen relies on memory B and T cells and their recall responses.

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Augmenting the portfolio of therapeutics for type 2-driven diseases is crucial to address unmet clinical needs and to design personalized treatment schemes. An attractive therapy for such diseases would consist in targeting the recruitment of T helper 2 (Th2) lymphocytes to inflammatory sites. Herein, we show the degradation of filamins (FLN) a and b by the ASB2α E3 ubiquitin ligase as a mechanism sustaining Th2 lymphocyte functions.

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Self-assembly of dry amphiphilic lipid films on surfaces upon hydration is a crucial step in the formation of cell-like giant unilamellar vesicles (GUVs). GUVs are useful as biophysical models, as soft materials, as chassis for bottom-up synthetic biology, and in biomedical applications. Here combined quantitative measurements of the molar yield and distributions of sizes and high-resolution imaging of the evolution of thin lipid films on surfaces, we report the discovery of a previously unknown pathway of lipid self-assembly which can lead to ultrahigh yields of GUVs of >50%.

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Solar heating of the upper ocean is a primary energy input to the ocean-atmosphere system, and the vertical heating profile is modified by the concentration of phytoplankton in the water, with consequences for sea surface temperature and upper ocean dynamics. Despite the development of increasingly complex modeling approaches for radiative transfer in the atmosphere and upper ocean, the simple parameterizations of radiant heating used in most ocean models can be significantly improved in cases of near-surface stratification. There remains a need for a parameterization that is accurate in the upper meters and contains an explicitly spectral dependence on the concentration of biogenic material, while maintaining the computational simplicity of the parameterizations currently in use.

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Article Synopsis
  • The study investigates how 35 nuclear receptors (NRs) influence the differentiation and maintenance of key immune cells using a method called "Rainbow-CRISPR."
  • It finds that receptors for retinoic acid have significant and specific roles in various immune cell types, particularly in macrophages.
  • Notably, it uncovers a unique function of the retinoic acid receptor gamma (RARγ) in regulating immune cell survival and inflammasome activity, revealing its dual role in promoting health or cell death in macrophages.
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Objectives: Persistent critical illness (PerCI) occurs when the patient's prolonged intensive care unit (ICU) stay results in complications that become the primary drivers of their condition, rather than the initial reason for their admission. Patients with frailty have a higher risk of developing and dying from PerCI. We aimed to investigate the interplay of frailty and PerCI in critically ill patients with COVID-19.

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Objective: Protocol to explore what is known about communication between critical care providers and patients and families from culturally and linguistically diverse backgrounds (defined as people who are either from minority ethnic groups, non-English-speaking backgrounds who may have diverse cultural, linguistic, spiritual and religious affiliations and opinions) about death, dying, end-of-life care and organ donation in the intensive care unit (ICU).

Introduction: Patients from culturally and linguistically diverse backgrounds experience barriers to optimised care when admitted to the ICU. These barriers appear to derive from differences in language, cultural, societal and ethical expectations between patients, their families and healthcare professionals.

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Objective:  Identifying underlying social risk factors for neonatal intensive care unit (NICU) admission is important for designing interventions to reduce adverse outcomes. We aimed to determine whether a patient's exposure to community-level stressors as measured by the social vulnerability index (SVI) is associated with NICU admission.

Study Design:  Retrospective cohort study (2014-2018) of patients delivering a liveborn ≥ 22 weeks' gestation at a quaternary care center.

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The single-celled cyanobacterium, , generates circadian rhythms with exceptional fidelity and synchrony despite their femtoliter volumes. Here, we explore the mechanistic aspects of this fidelity, by reconstituting the KaiABC post-translational oscillator (PTO) in cell-mimetic giant vesicles (GUVs) under well-defined conditions . PTO proteins were encapsulated with a coefficient of variation that closely matched protein variations observed in live cells.

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  • Physical activity and social engagement are essential for older adults to prevent functional decline and enhance their quality of life, yet a large percentage are physically inactive, with one in four adults globally not meeting activity guidelines.
  • The study evaluated the physical activity levels, functional status, and quality of life among 100 older patients (over 65) at a Chennai hospital, using several assessment tools to gather data.
  • Results revealed that only 17% of participants engaged in regular activity, with 81% not working on muscle strength or flexibility, and many reported disabilities, leading to challenges in daily tasks, although they had a moderate overall quality of life score.
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  • * A total of 7189 admissions for severe anaphylaxis were analyzed, showing an increase in the percentage of such cases from 0.25% in 2012 to 0.43% in 2022, with very low mortality rates of 0.4% and 0.8% in ICU and hospital settings, respectively.
  • * Factors predicting in-hospital mortality included older age, higher SOFA scores, chronic immunosuppressive conditions, and a respiratory rate above 16
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  • Preterm birth (PTB) is a significant cause of infant health issues in the US, influenced by racial, ethnic, and socioeconomic disparities, indicating a need for further research to understand risk factors.
  • Over the past decade, a study analyzed singleton live births in California to examine PTB rates among various racial and ethnic groups and insurance types, finding notable variations.
  • The overall PTB rate increased from 6.8% to 7.5% between 2011 and 2022, with the rates varying significantly among different racial groups, showing higher rates in Black individuals with public insurance compared to White individuals with nonpublic insurance.
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Article Synopsis
  • * Key questions have emerged regarding differences between COVID-19 and non-COVID-19 respiratory failures, the role of personalized therapy, and alternative respiratory support options to intubation.
  • * The chapter discusses advances in understanding respiratory failure, the significance of international collaboration among medical professionals, and the need for skepticism when evaluating rapidly evolving medical evidence during a pandemic.
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The coronavirus disease 2019 (COVID-19) pandemic has unquestionably transformed the field of intensive care medicine. Never have we witnessed millions of patients develop acute respiratory failure in such a short span of time. This led to extensive resource constraints and difficulty in treating patients.

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  • This study explored the link between fetal fraction (amount of fetal DNA in the mother's blood) and low birth weight in twin pregnancies, aiming to understand how these factors relate, especially in the first trimester.
  • The analysis included 1,041 twin pregnancies and found that no significant differences in fetal fraction existed between twins with low birth weight (<10th percentile) and those with normal birth weight (≥10th percentile).
  • Ultimately, the results indicated no correlation between high or low fetal fractions and low birth weight, suggesting that fetal fraction is not a reliable predictor of adverse birth weight outcomes in twin pregnancies.
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Objective:  Increasing availability of immediate postpartum long-acting reversible contraception (LARC) has added contraceptive alternatives to bilateral tubal ligation (BTL) in the immediate postpartum period. The resultant access to long-term contraception has provided patients with improved control over the timing of pregnancies. Our objective is to evaluate changes in the utilization of immediate postpartum contraceptive methods over a 10-year period and its association with interpregnancy interval (IPI).

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  • Acute hypoxaemic respiratory failure (AHRF) is a significant cause for ICU admissions, comprising over 52% of patients, with differing mortality rates based on severity.
  • A study from 2005 to 2022 revealed that the survival rate has improved overall in ICUs, with in-hospital mortality decreasing from 13.3% to 8.2%, even amidst the high risks associated with severe AHRF.
  • Researchers emphasize the need for better identification of AHRF patients to manage and reduce the risk of deterioration effectively, as the healthcare impact of AHRF may be larger than previously understood.
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The goal of this study was to assess the feasibility of using exome (ES) and genome sequencing (GS) in guiding preconception genetic screening (PCGS) for couples who are planning to conceive by creating a workflow for identifying risk alleles for autosomal recessive (AR) and X-linked (XL) disorders without the constraints of a predetermined, targeted gene panel. There were several limitations and challenges related to reporting and the technical aspects of ES and GS, which are listed in the discussion. We selected 150 couples from a cohort of families (trios) enrolled in a research protocol where the goal was to define the genetic etiology of disease in an affected child.

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Background: Timely goals-of-care (GOC) discussions are essential for end-of-life planning, particularly during acute hospital admissions, where ambiguity often persists. Frailty, prevalent in the ageing population and linked to adverse outcomes, underscores the need to align treatment strategies with quality of life. Recognising frailty as a trigger for GOC discussions during rapid response calls (RRCs) is critical for efficient resource management and improving patient outcomes.

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Background: The global implementation of full-time telework became widespread during the new normal conditions following the pandemic, resulting in reduced physical activity (PA) among teleworkers and young adults. It is vital to comprehend how telehealth interventions favorably impact PA levels and overall well-being of young adults who face increasingly blurred boundaries between work and home life.

Objectives: The aim of this study is to examine the effect of telerehabilitation (TR) on PA levels and quality of life (QoL) in young adult teleworkers.

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Neurological diseases often manifest with psychiatric symptoms, profoundly impacting patients' well-being and treatment outcomes. This comprehensive review examines the psychiatric manifestations associated with Alzheimer's disease, frontotemporal dementia (FTD), Parkinson's disease, multiple sclerosis (MS), stroke, epilepsy, Huntington's disease, amyotrophic lateral sclerosis (ALS), traumatic brain injury (TBI), and multiple system atrophy (MSA). Key psychiatric symptoms include agitation, depression, anxiety, apathy, hallucinations, impulsivity, and aggression across these diseases.

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Purpose: Perioperative in-hospital cardiac arrests (Perioperative IHCAs) may have better outcomes than IHCAs in the ward (Ward IHCAs), due to enhanced monitoring and faster response. However, quantitative comparisons of their long-term outcomes are lacking, posing challenges for prognostication.

Methods: This retrospective multicentre study included adult intensive care unit (ICU) admissions from theatre/recovery or wards with a diagnosis of cardiac arrest between January 2018 and March 2022.

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