Publications by authors named "Jayakumar A"

Neurosyphilis-induced dementia represents a severe manifestation of tertiary syphilis, characterized by cognitive and neuropsychiatric impairments. This condition arises from the progression of syphilis to the central nervous system, where the spirochete causes damage through invasion, chronic inflammation, and neurodegeneration. The pathophysiology involves chronic inflammatory responses, direct bacterial damage, and proteinopathies.

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Many estuaries experience eutrophication, deoxygenation and warming, with potential impacts on greenhouse gas emissions. However, the response of NO production to these changes is poorly constrained. Here we applied nitrogen isotope tracer incubations to measure NO production under experimentally manipulated changes in oxygen and temperature in the Chesapeake Bay-the largest estuary in the United States.

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  • Alzheimer's disease is increasingly affecting aging societies and primarily appears in a sporadic form linked to various genetic and environmental factors.
  • The condition can be viewed as an intensified version of the natural aging process of the brain, marked by the buildup of amyloid plaques due to impaired amyloid elimination.
  • The review focuses on the role of specific neuropeptides in accelerating dementia and explores their potential as therapeutic targets to slow down disease progression.
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Drug reaction with eosinophilia and systemic symptoms (DRESS) syndrome is a severe idiosyncratic drug reaction. This commonly manifests with fever, lymphadenopathy, and a maculopapular rash. It can be fatal if early diagnosis and removal of the offending agent do not occur.

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  • Type C hepatic encephalopathy (Type C HE) is a neurological disorder resulting from chronic liver failure, presenting symptoms like mental confusion and motor difficulties.
  • The increase in Alzheimer type II astrocytes (AT2A) is a significant finding linked to Type C HE, though the development of AT2A and its role in cognitive impairments is still unclear.
  • Research in rats indicates that elevated oxidative stress, inflammation, and specific signaling pathways contribute to the rise of GMF and AT2A, leading to cognitive and motor deficits, suggesting potential targets for treatment.
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Abrus precatorius is an ornamental plant that belongs to the Leguminoceae family. It contains toxalbumin, named abrin, in all of its parts. However, the seeds are more toxic when consumed in crushed form.

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  • Nitrite plays a crucial role in the nitrogen cycle, with its oxidation to nitrate preserving fixed nitrogen and its reduction to dinitrogen gas depleting it, challenging traditional views in ocean oxygen minimum zones (OMZs).
  • Researchers constructed 31 draft genomes of nitrite-oxidizing bacteria from global OMZs, revealing that these organisms exhibit distinct characteristics and are particularly abundant in oxygen-depleted areas.
  • The study highlights that these specialized bacteria, which thrive in low-oxygen environments, are vital for retaining fixed nitrogen in the ocean, affecting our understanding of nitrogen management in marine ecosystems.
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Background: During pregnancy, women can experience mental alterations, particularly anxiety and depression, which mark an important transition period in their lives. Social support appears to be a crucial alleviating factor for these disorders. The aim of this study is to assess the extent of psychological disturbances and their relieving factors by investigating correlations between mental status and different sociodemographic and clinical characteristics during the third trimester of pregnancy.

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  • * Traditional preservation methods include thermal, chemical, and radiation treatments, but there are concerns about their safety and consumer acceptance.
  • * Advanced, eco-friendly technologies like modified atmosphere packaging and edible coatings have been developed to enhance shelf life and address safety issues, with this review aiming to compile and analyze these advancements for researchers and students.
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  • Clostridial myonecrosis, or gas gangrene, is a serious and fast-moving bacterial infection that affects muscles and soft tissues, with around 1000 cases annually in the U.S. and even more in developing nations.
  • It is primarily caused by the Clostridium bacteria, which thrive in low-oxygen environments from injuries, leading to two types: traumatic (from injuries) and spontaneous (in immunocompromised individuals).
  • Symptoms include severe pain and swelling, rapid tissue death, and systemic effects if untreated; diagnosis relies on clinical assessments and imaging, while treatment consists of surgery, antibiotics, and possibly hyperbaric oxygen therapy.
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The COVID-19 pandemic has been one of the most impactful events in our lifetime, caused by severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2). Multiple SARS-CoV-2 variants were reported globally, and a wide range of symptoms existed. Individuals who contract COVID-19 continue to suffer for a long time, known as long COVID or post-acute sequelae of COVID-19 (PASC).

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  • * Research using mouse models infected with a coronavirus (MHV-1) has uncovered significant intestinal changes, resembling conditions like inflammatory bowel disease and celiac disease, which parallel effects seen in humans post SARS-CoV-2 exposure.
  • * Treatment with SPIKENET (SPK) shows promise in reducing intestinal damage from MHV-1 infection, highlighting its potential to help restore tissue health and manage inflammatory responses related to long COVID.
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Lung metastases are the primary cause of death for osteosarcoma (OS) patients. We recently validated interleukin-11 receptor α (IL-11Rα) as a molecular target for the inhibition of OS lung metastases. Since there is no clinically approved antibody against this receptor, we sought to identify downstream targets that mediate the effects of IL-11Rα signaling.

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Advances in assisted reproductive technologies have enabled postmenopausal women to achieve pregnancy beyond their reproductive lifespan. Although rare, these pregnancies are challenging and require a multidisciplinary approach due to the higher prevalence of medical comorbidities in this population. The placenta accreta spectrum is characterized by an abnormal invasion of chorionic villi into the myometrium.

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In recent years, there has been a growing demand for environmentally friendly smart packaging materials. Therefore, in this study, we developed an eco-friendly pH-sensitive indicator film through the solvent casting process, incorporating alginate, polyvinyl alcohol, garlic, and Nelumbo nucifera flower extract. The effect of extract on the chemical and physical properties of the film were extensively studied using various characterization techniques.

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Nitrous oxide (NO) is a potent greenhouse gas and a major cause of ozone depletion. One-third of atmospheric NO originates in aquatic environments. Reduction of NO to dinitrogen gas (N) requires the nitrous oxide reductase enzyme, which is encoded by the gene .

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Anammox bacteria inhabiting oxygen-deficient zones (ODZs) are a major functional group mediating fixed nitrogen loss in the global ocean. However, many basic questions regarding the diversity, broad metabolisms, origin, and adaptive mechanisms of ODZ anammox bacteria remain unaddressed. Here we report two novel metagenome-assembled genomes of anammox bacteria affiliated with the genus, which represent most, if not all, of the anammox bacteria in the global ODZs.

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Hepatic encephalopathy (HE) is a major neuropsychological condition that occursas a result of impaired liver function. It is frequently observed in patients with advanced liver disease or cirrhosis. Memory impairment is among the symptoms of HE; the pathophysiologic mechanism for this enervating condition remains unclear.

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Hepatic encephalopathy (HE) is a neurological condition linked to liver failure. Acute HE (Type A) occurs with acute liver failure, while chronic HE (Type C) is tied to cirrhosis and portal hypertension. HE treatments lag due to gaps in understanding its development by gender and age.

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The coronavirus disease-19 (COVID-19) pandemic, declared in early 2020, has left an indelible mark on global health, with over 7.0 million deaths and persistent challenges. While the pharmaceutical industry raced to develop vaccines, the emergence of mutant severe acute respiratory syndrome coronavirus-2 (SARS-CoV-2) strains continues to pose a significant threat.

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  • * The study aims to create a portable imaging system (PPRIM) for cervical imaging, focusing on assessing the uterus' polarization properties without using a speculum, thereby improving patient comfort.
  • * The PPRIM has been successfully designed to offer high-resolution imaging of the cervix, with the goal of enhancing care for women's reproductive health and ultimately reducing maternal and infant mortality rates.
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Researchers have concentrated on innovative approaches to increase the shelf life of perishable food products and monitor their quality during storage and transportation as consumer demand for safe, environmentally friendly, and effective packaging develops. This comprehensive review aims to provide an overview of recent developments in carboxymethyl cellulose (CMC) chemical synthesis and its applications in active and intelligent packaging materials. It explores various methods for modifying cellulose to produce CMC and highlights the unique properties that make it suitable for addressing packaging industry challenges.

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Methylene blue (MB), a common dye in the textile industry, has a multitude of detrimental consequences on humans and the environment. Accordingly, it is necessary to remove dyes from water to guarantee our health and sustainable ecosystem. In this study, we developed polyvinyl alcohol (PVA)-based hydrogel adsorbents with high adsorption capacity by adding three types of carrageenan (kappa, iota, and lambda) to remove MB from water.

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Purpura fulminans (PF) is a disorder with multifactorial causes that lead to acute localize skin microvasculature thrombosis. PF can be classified as one of the manifestations of disseminated vascular coagulation (DIC). Although, there are three types of PF including hereditary (autosomal dominant) due to mutations in single nucleotide polymorphisms (PROC and PROS1) and serpin family C member 1 (SERPINC1) genes.

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From the environmental perspective, it is essential to develop cheap, eco-friendly, and highly efficient materials for water and wastewater treatment. In this regard, hydrogels and hydrogel-based composites have been widely employed to mitigate global water pollution as this methodology is simple and free from harmful by-products. Notably, alginate and cellulose, which are natural carbohydrate polymers, have gained great attention for their availability, price competitiveness, excellent biodegradability, biocompatibility, hydrophilicity, and superior physicochemical performance in water treatment.

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