Publications by authors named "Vijay Srivastava"

Bacteria possess hair-like projections on their surface termed pili. The primary function of a pilus is to enable bacterial cell attachment to the host. Since pili are associated with cell adhesion, they play a major role in bacterial colonization and infection.

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Article Synopsis
  • - This study investigates the socioeconomic, demographic, and behavioral factors contributing to dengue outbreaks in the Gorakhpur region of Uttar Pradesh, India, focusing on patients recently discharged from the hospital.
  • - Key findings reveal that males aged 19-45, predominantly from urban and lower-income backgrounds, were most affected, with low awareness of dengue and limited healthcare access, as only 10.8% had health insurance.
  • - The research indicated that education level, income, and preventive behaviors such as using mosquito repellent were significant factors influencing dengue infection rates, highlighting a substantial knowledge gap in rural populations compared to their urban counterparts.
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Multi-drug resistance in bacteria is emerging as a major global health challenge, causing substantial harm in terms of mortality, morbidity, and financial strain on healthcare systems. These bacteria are constantly acquiring new virulence factors and drug-resistance mechanisms, which highlights the critical need for innovative antimicrobial medicines and identification of new therapeutic targets, such as Sortase A (EfSrtA). EfSrtA, a transpeptidase significant for the adhesion and virulence of Enterococcus faecalis (E.

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Enterococcus faecalis (E. faecalis) is commonly occurring pathogen associated with nosocomial infections. Infections are difficult to treat because of their multidrug-resistant (MDR) nature and their tendency to form biofilms.

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Developing countries continuously face challenges to get rid of amoebiasis, a protozoan disease caused by Entamoeba histolytica. Every year around 900 million people get affected by amoebiasis, among them only 10 % of people show the symptoms of the disease while 90 % of people do not show any symptoms but still, serve as carriers of the disease. Asymptomatic persons carry cysts of Entamoeba in their fecal matter, which is carried by house flies to contaminate the food and water.

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The Mycobacterium cell wall is a capsule-like structure comprising of various layers of biomolecules such as mycolic acid, peptidoglycans, and arabinogalactans, which provide the Mycobacteria a sort of cellular shield. Drugs like isoniazid, ethambutol, cycloserine, delamanid, and pretomanid inhibit cell wall synthesis by inhibiting one or the other enzymes involved in cell wall synthesis. Many enzymes present across these layers serve as potential targets for the design and development of newer anti-TB drugs.

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Background: The curricula of Ayurveda programmes emphasise various theoretical constructs such as Tridosha (three factors determining the state of health), Agnibala (digestive strength), Samprapti (patho-physiology), among others. It is often argued that practitioners follow an individualised approach based on these principles while treating patients. Yet, dependable data on their real-world influence is lacking.

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Developing cost-effective and high-performance catalyst systems for dry reforming of methane (DRM) is crucial for producing hydrogen (H) sustainably. Herein, we investigate using iron (Fe) as a promoter and major alumina support in Ni-based catalysts to improve their DRM performance. The addition of iron as a promotor was found to add reducible iron species along with reducible NiO species, enhance the basicity and induce the deposition of oxidizable carbon.

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Sepsis is a complex clinical condition and a leading cause of death worldwide. During Sepsis, there is a derailment in the host response to infection, which can progress to severe sepsis and multiple organ dysfunction or failure, which leads to death. Free radicals, including reactive oxygen species (ROS) generated predominantly in mitochondria, are one of the key players in impairing normal organ function in sepsis.

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Hydrogen production from dry reforming of methane (DRM) not only concerns with green energy but also involves the consumption of two greenhouse gases CH and CO. The lattice oxygen endowing capacity, thermostability, and efficient anchoring of Ni has brought the attention of the DRM community over the yttria-zirconia-supported Ni system (Ni/Y + Zr). Herein, Gd-promoted Ni/Y + Zr is characterized and investigated for hydrogen production through DRM.

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Sepsis is one of the deadliest disorders in the new century due to specific limitations in early and differential diagnosis. Moreover, antimicrobial resistance (AMR) is becoming the dominant threat to human health globally. The only way to encounter the spread and emergence of AMR is through the active detection and identification of the pathogen along with the quantification of resistance.

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Previous reports from our lab have documented dysregulated host inflammatory reactions in response to bacterial infections in sepsis. Both Gram-negative bacteria (GNB) and Gram-positive bacteria (GPB) play a significant role in the development and progression of sepsis by releasing several virulence factors. During sepsis, host cells produce a range of inflammatory responses including inducible nitric oxide synthase (iNOS) expression, nitrite generation, neutrophil extracellular traps (NETs) release, and pro-inflammatory cytokines production.

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Oxidative stress resulting from the disproportion of oxidants and antioxidants contributes to both physiological and pathological conditions in sepsis. To combat this, the antioxidant defense system comes into the picture, which contributes to limiting the amount of reactive oxygen species (ROS) leading to the reduction of oxidative stress. However, a strong relationship has been found between scavengers of ROS and antioxidants in preclinical in vitro and in vivo models.

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Infections caused by the bacteria Enterococcus faecalis (also known as E. faecalis) are common in hospitals. This bacterium is resistant to a wide range of medicines and causes a variety of nosocomial infections.

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Enterococcus faecalis (E. faecalis) is an opportunistic multidrug-resistant (MDR) pathogen found in the guts of humans and farmed animals. Due to the occurrence of (MDR) strain there is an urgent need to look for an alternative treatment approach.

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The regulation of the activity of proteases by endogenous inhibitors is a common trend in almost all forms of life. Here, we review the endogenous inhibitors of cysteine proteases of three major pathogenic parasitic protozoa. The review focuses on members of the genus Plasmodium, Entamoeba, and Leishmania.

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Article Synopsis
  • Developing cost-effective nonprecious metal-based catalysts for syngas production via dry reforming of methane is challenging, but a mechanochemical method was used to create Ba-promoted Ni-based catalysts on zirconia supports.
  • Characterization techniques like BET surface area measurements and spectroscopy were employed to assess the catalysts, showing that the presence of Ba enhanced the performance and stability of the catalysts compared to others tested.
  • The optimal 5Ni4Ba/YZr catalyst exhibited a high hydrogen yield of 79% for 7 hours and demonstrated the highest hydrogen formation rate and the lowest activation energy among the tested systems.
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S-adenosylhomocysteine nucleosidase (MTAN) is a protein that plays a crucial role in several pathways of bacteria that are essential for its survival and pathogenesis. In addition to the role of MTAN in methyl-transfer reactions, methionine biosynthesis, and polyamine synthesis, MTAN is also involved in bacterial quorum sensing (QS). In QS, chemical signaling autoinducer (AI) secreted by bacteria assists cell to cell communication and is regulated in a cell density-dependent manner.

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Chronic obstructive pulmonary disease (COPD) is pulmonary emphysema characterized by blockage in the airflow resulting in the long-term breathing problem, hence a major cause of mortality worldwide. Excessive generation of free radicals and the development of chronic inflammation are the major two episodes underlying the pathogenesis of COPD. Currently used drugs targeting these episodes including anti-inflammatory, antioxidants, and corticosteroids are unsafe, require high doses, and pose serious side effects.

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() is a pathogenic eukaryote that often resides silently in humans under asymptomatic stages. Upon indeterminate stimulus, it develops into fulminant amoebiasis that causes severe hepatic abscesses with 50% mortality. This neglected tropical pathogen relies massively on membrane modulation to flourish and cause disease; these modulations range from the phagocytic mode for food acquisition to a complex trogocytosis mechanism for tissue invasion.

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  • The B.1.617.1 variant of SARS-CoV-2 is linked to the COVID-19 second wave and shows high levels of infectivity and mortality, necessitating the study of its spike (S) protein structure and immune responses.
  • An in silico approach was used to analyze the amino acid sequence of the B.1.617.1 variant S protein, predicting its secondary and tertiary structures along with immunogenic features such as B- and T-cell epitopes.
  • Findings indicated the S protein has stable characteristics, with identified antigenic epitopes that could aid in the development of targeted vaccines or drugs against this variant.
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Sepsis is a clinical syndrome resulting from infection followed by inflammation and is one of the significant causes of mortality worldwide. The underlying reason is the host's uncontrolled inflammatory response due to an infection led to multiple organ dysfunction/failure. Neutrophils, an innate immune cell, are forerunners to reach the site of infection/inflammation for clearing the infection and resolute the inflammation during sepsis.

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Entamoeba histolytica is the conductive agent of amoebiasis. Upon the parasite's infection, macrophages and neutrophils are activated by interferon γ, IL-13 and tumour necrosis factor. These immune cells then carry out the amoebicidal activity by releasing nitric oxide synthase and reactive oxygen species (ROS).

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The era of rapid industrialization succeeded by a shift in organizational focus on research and technology development which has fueled many industries along with the dairy industry to grow at an exponential rate. The dairy industry has achieved remarkable growth in the last decade in India. Waste produced by dairy industry consists of a high organic load thus cannot be discharged untreated.

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