Publications by authors named "Krishna Gupta"

Recombinant proteins, which are produced using recombinant DNA technology, have transformed the domains of biotechnology and biomedicine by allowing the production of proteins that are often expensive or difficult to obtain from natural sources. More than 130 recombinant proteins are currently in clinical use by the US FDA, demonstrating the importance of these proteins in both research and therapeutic applications. Bacterial, yeast, mammalian cell cultures, and hybridoma technology are examples of recombinant protein production systems that have enabled the large-scale production of therapeutic proteins, including monoclonal antibodies, which are now essential tools in disease treatment.

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Introduction: Laryngopharyngeal reflux (LPR) is a common disease in the outpatient department of otolaryngology and is characterised by backflow of stomach contents into the pharynx and larynx resulting in significant negative impact on the quality of life of patients. The aim of study was to assess the effect of proton pump inhibitor (PPI) on quality of life in patients with LPR.

Method: 110 patients diagnosed with LPR were enrolled in study and prescribed omeprazole (20 mg) twice daily for 12 weeks.

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Currently, the main focus of anticancer drug development and research is to develop anticancer treatment strategies that are both less harmful and more effective. Flavones, a subclass of flavonoids, have shown great promise in the advancement of anticancer drugs because of their strong bioactive properties. Fruits, vegetables, and medicinal plants are abundant sources of these naturally occurring compounds, which have a variety of biological activities such as anti-inflammatory, anti-cancer, and antioxidant properties.

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Lewis acid-promoted 5/6- hydroalkoxylation/reduction cascade of ω-hydroxy cyclopropenes gave expeditious, stereoselective access to THF/THP derivatives. Monoester substituted ω-hydroxy cyclopropenes on treatment with catalytic Bi(OTf) lead to [5,5]/[6,5] oxaspirocyclic lactones. This unified strategy relies on generation of transient donor-acceptor (D-A) cyclopropanes from ω-hydroxy cyclopropene precursors.

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Covalent organic frameworks (COFs), a promising class of nanoporous materials, have received significant attention for membrane separation. Currently, several COFs are reported for alcohol dehydration, but they are not efficient owing to the pervasive challenge to separate small-sized molecular mixture. Herein, first we have computationally explored a series of COFs with different functionality and aperture size as pervaporation (PV) membrane and identified a novel COF for efficient dehydration of water/alcohol mixtures (90 wt % IPA, 90 wt % -butanol and 90 wt % -butanol).

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L. is immensely valuable in pharmacology. Computational approach through network pharmacology has been attempted to understand lead molecules of Cressa and their interactions with multiple targets.

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Background: Rheumatoid arthritis (RA) is a chronic inflammatory disease that requires early detection and treatment. Currently, we have three categories of slow-acting disease-modifying antirheumatic drugs (DMARDs): (1) conventional synthetic (csDMARD), (2) biologic (bDMARD), and (3) directed or targeted synthetic (tsDMARD).

Objective: This review explores innovative therapeutic modalities for RA, discussing their potential advantages and challenges.

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Article Synopsis
  • The study presents a method using TMSOTf to create spiroketal derivatives through hydroalkoxylation and cycloaddition reactions involving hydroxy cyclopropenes and aldehydes.
  • This process generates a donor-acceptor cyclopropane intermediate, allowing for the efficient synthesis of [5.5]- and [6.5]-spiroketals.
  • The resulting spirocyclic compounds can be further modified to produce complex polycyclic heterocycles through metal halogen exchange and copper-catalyzed reactions, with a decarboxylation step that introduces a fourth chiral center.
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Background: Unroofed coronary sinus (UCS) is a rare congenital anomaly and is usually found incidentally. While coronary sinus thrombosis (CST) can occur following instrumentation of the coronary sinus, spontaneous CST is a rare occurrence and only a few cases have been reported to date. The presence of both rare entities concurrently has not been reported previously.

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Lid Wiper Epitheliopathy (LWE) is a recognized ocular condition affecting visual quality and ocular comfort, characterized by the damage of the marginal conjunctiva of the upper eyelid. This review critically examines the current strategies for LWE identification and explores the multifactorial etiology of LWE and its association with various ocular surface diseases. A literature review conducted on PubMed identified 67 relevant studies, which were analyzed to enhance understanding of LWE's diagnostic criteria and its clinical implications, offering future perspectives on improving diagnostic accuracy and patient outcomes.

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Preservatives are critical ingredients in various pharmaceutical and consumer products. In particular, a high efficacy preservative system is essential in enhancing the shelf-life and safety of these products. However, the development of such a preservative system heavily relies on experimental approaches.

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Nucleic acid tests (NATs) are essential for biomedical diagnostics. Traditional NATs, often complex and expensive, have prompted the exploration of toehold-mediated strand displacement (TMSD) circuits as an economical alternative. However, the wide application of TMSD-based reactions is limited by 'leakage'-the spurious activation of the reaction leading to high background signals and false positives.

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Introduction: Refractive error is the inability of eyes to focus clearly on images. Visual impairment due to refractive error has a major impact on children's education and daily activities. The hospital has no documentation of the ocular morbidity related to refractive errors in children.

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The Transcription factor II B (TFIIB)‑related factor 2 (BRF2) containing TFIIIB complex recruits RNA polymerase III multi-subunit complex to selective gene promoters that altogether are responsible for synthesizing a variety of small non-coding RNAs, including a special type of selenocysteine tRNA (tRNASec), micro-RNA (miRNA), and other regulatory RNAs. BRF2 has been identified as a potential oncogene that promotes cancer cell survival under oxidative stress through its genetic activation. The structure of the BRF2 protein was modeled using the Robetta server, refined, and validated using the Ramachandran plot.

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Microbially induced calcite precipitation (MICP) through urease enzyme has attained a lot of recognition in various fields of civil engineering and geotechnology for stabilizing the strength of soil and various concrete materials. The activity of urease has been found to be affected by various factors like temperature, substrate concentrations, pH of the medium, presence of inhibitors, etc. Through this study, the outcome of the interaction of pesticides (commonly found in Indian coastal regions) on urease, a major organism reported for MICP studies has been investigated .

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The final stage of almost all chronic kidney diseases is renal fibrosis. Simple wounds or persistent inflammation can cause tissue inflammation, which, in the case of the kidney, results in scarring. Vascular sclerosis, tubulointerstitial fibrosis and glomerular fibrosis are all types of kidney fibrosis.

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Three-dimensional cell and organoid cultures rely on the mechanical support of viscoelastic matrices. However, commonly used matrix materials lack control over key cell-instructive properties. Here we report on fully synthetic hydrogels based on DNA libraries that self-assemble with ultrahigh-molecular-weight polymers, forming a dynamic DNA-crosslinked matrix (DyNAtrix).

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Stereoselective syntheses of pyrrolidines and piperidines bearing hydrophobic chains have been achieved through a metal free, Lewis acid-mediated 5/6- reductive hydroamination cascade of enynyl amines. The brevity of the developed strategy allowed for the collective stereoselective total synthesis of various alkaloids, including (±)-pyrrolidine -225H, (±)--197B, (±)--225C, the family of (+)-solenopsins and (+)-isosolenopsins, and the formal synthesis of (±)-bgugaine and (+)-azimic acid.

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Regioselective amination of polyhalogenated heteroarenes (especially pyrimidines) has extensive synthetic and commercial relevance for drug synthesis applications but is plagued by the lack of effective synthetic strategies. Herein, we report the Cu(II)/PTABS-promoted highly regioselective nucleophilic aromatic substitution (SAr) of polychlorinated pyrimidines assisted by DFT predictions of the bond dissociation energies of different C-Cl bonds. The unique reactivity of Cu(II)-PTABS has been attributed to the coordination/activation mechanism that has been known to operate in these reactions, but further insights into the catalytic species have also been provided.

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As a sequel to our recent study on the oxidation by O, i. e., autoxidation of dissolved hydrogen sulfide, HS, in aqueous medium, we present here the results of a similar study in rain water medium.

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Solid dispersion of poorly soluble APIs is known to be a promising strategy to improve dissolution and oral bioavailability. To facilitate the development and commercialization of a successful solid dispersion formulation, understanding of intermolecular interactions between APIs and polymeric carriers is essential. In this work, first, we assessed the molecular interactions between various delayed-release APIs and polymeric excipients using molecular dynamics (MD) simulations, and then we formulated API solid dispersions using a hot melt extrusion (HME) technique.

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Fusarium oxysporum f. sp. Lycopersici (FOL) is a soilborne pathogen that infects tomato plants and inflicts severe damage, resulting in heavy yield losses worldwide, causing Fusarium wilt disease.

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Vibrio cholerae causes cholera, an acute diarrhoeal disease. The virulence in V. cholerae is regulated by the quorum-sensing mechanism and response regulator LuxO positively regulates the expression of virulence determinants adhesion, biofilm formation, and cholera toxin production.

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