Publications by authors named "Vickineshwari Kunasegaran"

This study aims to evaluate the rice husk (EE-R) and lemongrass (EE-L) derived-eco-enzymes (EE) as alternatives to chemical-based disinfectants. The EE-R and EE-L's antimicrobial activity were tested against Pseudomonas aeruginosa, Salmonella Typhimurium, and Staphylococcus aureus using a broth microdilution method. The antibiofilm activities of EE were determined using crystal violet staining.

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The study addressed a significant gap in the profiling and understanding of the gut microbiota's influence on Malaysian Malay women with gestational diabetes mellitus (GDM). This prospective cohort study aimed to explore the intricate relationship between gut microbiota, dietary choices, and lifestyle factors among Malay women, both with and without GDM. The research specifically focused on participants during the second (T0) and third (T1) trimesters of pregnancy in Johor Bahru, Malaysia.

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Article Synopsis
  • * The reduced T-cell response in these patients correlates with their ability to clear SARS-CoV-2 following breakthrough infections, highlighting the clinical significance of their immunosuppressed state.
  • * To address these immune deficiencies, researchers developed engineered T-cells that are less affected by common SARS-CoV-2 variants, presenting a promising new treatment option for SOT patients battling COVID-19.
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Mental fatigue has shown to be one of the root causes of decreased productivity and overall cognitive performance, by decreasing an individual's ability to inhibit responses, process information and concentrate. The effects of mental fatigue have led to occupational errors and motorway accidents. Early detection of mental fatigue can prevent the escalation of symptoms that may lead to chronic fatigue syndrome and other disorders.

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Plant-based diets have grown increasingly popular across the globe, mainly for their health and environmental benefits. Several studies have identified a link between plant-based diets and the decreased risk of developing cardiovascular diseases, obesity, and other health issues. We systematically reviewed human interventions to identify the relationship between various plant-based food items and the gut microbiome, alongside the biochemical and anthropometric measurements as secondary findings.

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Purpose Of Review: Although gut microbiota have been associated with the etiology of some diseases, the influence of foods on gut microbiota, especially among pregnant women, remains unclear. Hence, a systematic review was performed to investigate the association between diet and gut microbiota and their influence on metabolic health in pregnant women.

Recent Findings: We performed the systematic review using the Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) 2020 protocol to investigate the association between diet and gut microbiota and their influence on metabolic role in pregnant women.

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Patients receiving CD19 CAR T-cell therapy for relapsed/refractory lymphoma experience prolonged and profound B-cell aplasia and hypogammaglobulinemia, placing them at a higher risk for severe COVID-19. Independently, Oh et al and Atanackovic et al demonstrate that despite attenuated humoral response to mRNA-based vaccines, patients demonstrate normal or heightened functional T-cell responses, including antiviral T-cell activity against SARS-CoV-2 variants including Omicron. Collectively, these data reinforce the importance of COVID-19 vaccination following CD19 CAR T-cell therapy, despite long-term B-cell aplasia.

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Article Synopsis
  • - The study examined the immune responses to SARS-CoV-2 over time in 994 healthy South Asian men with mild COVID-19, focusing on both antibody (humoral) and T cell (cellular) responses.
  • - Findings showed that while antibody levels declined over time, T cell responses remained stable for up to nine months after infection, indicating a longer-lasting immune response from T cells.
  • - The research highlights significant variability in the strength of both immune responses within the study group, which could inform COVID-19 monitoring, vaccination approaches, and future health planning post-pandemic.
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General gut microbial dysbiosis in diabetes mellitus, including gestational diabetes mellitus (GDM), has been reported in a large body of literature. However, evidence investigating the association between specific taxonomic classes and GDM is lacking. Thus, we performed a systematic review of peer-reviewed observational studies and trials conducted among women with GDM within the last ten years using standard methodology.

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  • The study focuses on assessing T cell responses to SARS-CoV-2 through a new, simple test that measures cytokines after stimulating whole blood with spike protein peptides.
  • The test was evaluated in various groups, including vaccinated individuals and COVID-19 patients, and showed sensitivity comparable to traditional methods.
  • Results indicated that T cell responses were similar in vaccinated and convalescent individuals, but varied widely among individuals, highlighting the need to measure both antibody and T cell immunity for better understanding vaccine effectiveness.
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  • The study investigates how neutralising antibodies specific to SARS-CoV-2 change over time in recovered COVID-19 patients, exploring their impact on long-term immunity.
  • Researchers monitored 164 patients for up to 180 days post-symptom onset, analyzing serum samples to categorize the dynamics of antibody waning into five distinct patterns.
  • Key findings revealed that a significant portion of participants experienced varying rates of antibody decline, highlighting the complexity of immune responses post-infection and the need for further investigation into the longevity of immunity.
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The efficacy of virus-specific T cells in clearing pathogens involves a fine balance between antiviral and inflammatory features. SARS-CoV-2-specific T cells in individuals who clear SARS-CoV-2 without symptoms could reveal nonpathological yet protective characteristics. We longitudinally studied SARS-CoV-2-specific T cells in a cohort of asymptomatic (n = 85) and symptomatic (n = 75) COVID-19 patients after seroconversion.

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A rapid increase in the prevalence of gestational diabetes mellitus (GDM) has been associated with various factors such as urbanization, lifestyle changes, adverse hyperglycemic intrauterine environment, and the resulting epigenetic changes. Despite this, the burden of GDM has not been well-assessed in Southeast Asia. We comprehensively reviewed published Southeast Asian studies to identify the current research trend in GDM in this region.

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Article Synopsis
  • Virus-specific immunity, both humoral (antibodies) and cellular (T cells), works together to protect against viral infections.
  • The study examines 12 patients with acute SARS-CoV-2 infection, tracking their immune responses and viral loads from early illness to recovery or death.
  • Findings suggest that rapid antibody responses link to severe disease, while early T cell responses are associated with milder disease and faster viral clearance, highlighting the potential for T cells in vaccine development and monitoring immune responses.
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  • Previous infections can shape how the immune system responds to new viruses, but little is known about memory T cells reacting to SARS-CoV-2.
  • In a study with COVID-19 survivors, researchers found specific T cells targeting the nucleocapsid protein of SARS-CoV-2 and discovered long-lasting memory T cells from individuals who recovered from SARS that recognized this same protein 17 years later.
  • They also identified SARS-CoV-2-specific T cells in people with no prior infections, suggesting cross-reactivity and diverse immune responses to related coronaviruses, highlighting the need to understand how existing T cell immunity influences COVID-19 outcomes.
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Background & Aims: Chronic hepatitis B virus (HBV) infection is characterized by the presence of defective viral envelope proteins (hepatitis B surface antigen [HBsAg]) and the duration of infection-most patients acquire the infection at birth or during the first years of life. We investigated the effects of these factors on patients' lymphocyte and HBV-specific T-cell populations.

Methods: We collected blood samples and clinical data from 243 patients with HBV infection (3-75 years old) in the United Kingdom and China.

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Article Synopsis
  • CD8 T cells can respond differently to hepatitis B, either becoming dysfunctional or differentiating into effective cells, but the reasons for these varied responses are not well understood.
  • Research shows that when Kupffer cells prime CD8 T cells, they develop into immotile effector cells forming clusters in the liver; however, priming by hepatocytes leads to activated but not differentiated cells, resulting in motile clusters.
  • Analysis reveals that the dysfunctional CD8 T cells primed by hepatocytes have distinct characteristics and do not respond to anti-PD-L1 treatment, but can be stimulated with IL-2, suggesting new immunotherapy approaches for chronic hepatitis B.
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Type 2 diabetes is becoming common among people in their 20s and 30s. Glycaemic control is suboptimal in this group and is associated with poor medication adherence. We studied medication adherence over a 24-month period in all diabetes clinic registrants (n = 266) between the ages of 18 and 39 years.

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Background: The clinical management of chronic hepatitis B virus (HBV) patients is based exclusively on virological parameters that cannot independently determine in which patients nucleos(t)ide-analogue (NUC) therapy can be safely discontinued. NUCs efficiently suppress viral replication, but do not eliminate HBV. Thus, therapy discontinuation can be associated with virological and biochemical relapse and, consequently, therapy in the majority is life-long.

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A 23-year-old man presenting with florid Cushing's syndrome was found to have high plasma ACTH and very high serum prolactin. Pituitary MRI showed a large invasive macroadenoma. Low-dose cabergoline promptly suppressed both ACTH and prolactin levels within 2 weeks, with unexpected clinical and biochemical hypocortisolism requiring hydrocortisone replacement.

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Pioglitazone is an anti-diabetic drug with potential to cause adverse effects following prolonged use. This study, therefore, investigated the effects of combination treatment of a subliminal concentration of pioglitazone and quercetin, a potent antioxidant, on vascular reactivity of aorta isolated from fructose-streptozotocin (F-STZ)-induced diabetic rats. Relaxation to acetylcholine and sodium nitroprusside, and contraction to phenylephrine were tested in organ bath chambers following pre-incubation with vehicle (DMSO; 0.

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In this study, we investigated the antipsychotic-like effect of methanolic extract of leaf (MMS) using and studies. studies comprised of apomorphine-induced climbing behavior, haloperidol-induced catalepsy, and ketamine-induced social withdrawal tests in mice whereas the study was conducted utilizing isolated rat vas deferens preparation. Acute oral administration of MMS (50-500 mg/kg) showed an inverted bell-shaped dose-response in apomorphine-induced cage climbing behavior in mice.

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This study investigated the effects of combined minimal concentrations of quercetin and pioglitazone on angiotensin II-induced contraction of the aorta from fructose-streptozotocin (F-STZ)-induced type 2 diabetic rats and the possible role of superoxide anions (O2(-)) and nitric oxide (NO) in their potential therapeutic interaction. Contractile responses to Ang II of aortic rings from Sprague-Dawley (SD) and F-STZ rats were tested following pre-incubation of the tissues in the vehicle (DMSO; 0.05%), quercetin (Q, 0.

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Curcuma purpurascens BI. rhizome, a member of the Zingiberaceae family, is a popular spice in Indonesia that is traditionally used in assorted remedies. Dichloromethane extract of C.

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Introduction: Maternal mortality and morbidity from eclampsia continues to be seen around the globe. Local Key Performance Index on recurrence of eclamptic fits did not meet targets, thus this raised the issue whether the care provided adhered to the standard management for eclampsia.

Methods: This clinical audit was conducted to assess and improve the quality of the service being offered to patient, particularly in managing eclampsia cases.

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