Publications by authors named "Naveed Ahmed Khan"

The procedure for disposing of textile waste sludge requires sustainable solutions due to numerous environmental issues associated with its disposal. The majority of textile manufacturers incinerate the waste sludge to meet their heating demands, which is harmful to the environment. It can also be used in soil amendment, biodegradable products, construction material and water treatment process as absorbent to remove the heavy metals etc.

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  • * This study tested a nano-formulation combining patuletin with gallic acid-functionalized zinc oxide nanoparticles (PA-GA-ZnO) and found it had significant anti-amoebic effects and enhanced the efficacy of patuletin against these pathogens.
  • * The nano-formulation showed low toxicity to human cells, suggesting its potential use, but further research is needed to explore how it works and to conduct animal studies before considering clinical application.
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Purpose: The treatment of amoebic infections is often problematic, largely due to delayed diagnosis, amoebae transformation into resistant cyst form, and lack of availability of effective chemotherapeutic agents. Herein, we determined anti-Acanthamoeba castellanii properties of three metal oxide nanoparticles (TiO, ZrO, and AlO).

Methods: Amoebicidal assays were performed to determine whether metal oxide nanoparticles inhibit amoebae viability.

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Herein, we investigated the anti-amoebic activity of phosphonium-chloride-based deep eutectic solvents against pathogenic Acanthamoeba castellanii of the T4 genotype. Deep eutectic solvents are ionic fluids composed of two or three substances, capable of self-association to form a eutectic mixture with a melting point lower than each substance. In this study, three distinct hydrophobic deep eutectic solvents were formulated, employing trihexyltetradecylphosphonium chloride as the hydrogen bond acceptor and aspirin, dodecanoic acid, and 4-tert-butylbenzoic acid as the hydrogen bond donors.

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Managing primary amoebic meningoencephalitis, induced by Naegleria fowleri poses a complex medical challenge. There is currently no specific anti-amoebic drug that has proven effectiveness against N. fowleri infection.

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is an opportunistic pathogen with public health implications, largely due to its invasive nature and non-specific symptoms. Our study focuses on the potential of azole compounds, particularly those with triazole scaffolds, as anti-amoebic agents. Out of 10 compounds, compounds T1 and T8 exhibited effective anti- activity with MIC values of 125.

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Introduction A traumatic brain injury (TBI) is one of the leading causes of injury-related deaths, making it a public health concern of extreme importance. In a developing country such as Pakistan, TBIs are significantly underreported, with the treatment frequently being delayed and inadequate, especially in rural healthcare setups all across the country. This concern is further magnified by insufficient epidemiological data on TBIs available in Pakistan.

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With the emergence of drug-resistance, there is a need for novel anti-bacterials or to enhance the efficacy of existing drugs. In this study, Patuletin (PA), a flavanoid was loaded onto Gallic acid modified Zinc oxide nanoparticles (PA-GA-ZnO), and evaluated for antibacterial properties against Gram-positive (Bacillus cereus and Streptococcus pneumoniae) and Gram-negative (Samonella enterica and Escherichia coli) bacteria. Characterization of PA, GA-ZnO and PA-GA-ZnO' nanoparticles was accomplished utilizing fourier-transform infrared spectroscopy, efficiency of drug entrapment, polydispersity index, zeta potential, size, and surface morphology analysis through atomic force microscopy.

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Keratitis is corneal inflammatory disease which may be caused by several reason such as an injury, allergy, as well as a microbial infection. Besides these, overexposure to ultraviolet light and unhygienic practice of contact lenses are also associated with keratitis. Based on the cause of keratitis, different lines of treatments are recommended.

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The free living Acanthamoeba spp. are ubiquitous amoebae associated with potentially blinding disease known as Acanthamoeba keratitis (AK) and a fatal central nervous system infection granulomatous amoebic encephalitis (GAE). With the inherent ability of cellular differentiation, it can phenotypically transform to a dormant cyst form from an active trophozoite form.

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In view of the critical role the gut microbiome plays in human health, it has become clear that astronauts' gut microbiota composition changes after spending time in space. Astronauts are exposed to several risks in space, including a protracted period of microgravity, radiation, and mechanical unloading of the body. Several deleterious effects of such an environment are reported, including orthostatic intolerance, cardiovascular endothelial dysfunction, cellular and molecular changes, and changes in the composition of the gut microbiome.

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  • Granulomatous amoebic encephalitis (GAE) is a serious central nervous system disease with no current effective treatments, leading researchers to explore synthetic compounds for new drug development.
  • The study successfully synthesized seventeen 1,4-benzothiazine derivatives and characterized them using various spectroscopic techniques, finding significant anti-amoebic activity against targeted pathogens.
  • Some derivatives demonstrated strong potency in reducing pathogen viability while maintaining lower to moderate toxicity levels against human keratinocytes, indicating potential for developing new therapies for GAE and related infections.
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  • * A study with 20 Emirati participants revealed that those with both vitamin D deficiency and obesity had significantly higher arterial stiffness compared to healthy controls, indicating potential biological underpinnings at play.
  • * Differential gene expression analysis showed activation of pathways related to inflammation and oxidative stress, suggesting these could be targeted for future preventive strategies against CVDs among affected individuals.
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  • * Both AMS and AMS-AgNPs were effective in killing A. castellanii in a dose-dependent manner, showing lower toxicity with AMS-AgNPs, while they also induced cell death (apoptosis) through mitochondrial pathways, increasing harmful reactive oxygen species.
  • * Whole transcriptome analysis revealed significant changes in gene expression post-treatment, indicating a focus on
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Acanthamoeba castellanii is the causative agent of fatal encephalitis and blinding keratitis. Current therapies remain a challenge, hence there is a need to search for new therapeutics. Here, we tested embelin (EMB) and silver nanoparticles doped with embelin (EMB-AgNPs) against A.

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  • * Researchers evaluated various sulfamate derivatives to see how well they could kill or inhibit the growth and adhesion of Acanthamoeba castellanii.
  • * The most promising compounds, 1j & 1k, significantly reduced amoeba viability with minimal toxicity to human cells, suggesting they could be potential new drugs for treating Acanthamoeba infections.
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The development of antibiotic alternatives that entail distinctive chemistry and modes of action is necessary due to the threat posed by drug resistance. Nanotechnology has gained increasing attention in recent years, as a vehicle to enhance the efficacy of existing antimicrobials. In this study, Chitosan copper oxide nanoparticles (CHI-CuO) were synthesized and were further loaded with Quercetagetin (QTG) to achieve the desired (CHI-CuO-QTG).

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With the rise of antibiotic resistance globally, coupled with evolving and emerging infectious diseases, there is an urgent need for the development of novel antimicrobials. Deep eutectic solvents (DES) are a new generation of eutectic mixtures that depict promising attributes with several biological implications. DES exhibit unique properties such as low toxicity, biodegradability, and high thermal stability.

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Acanthamoeba castellanii is an opportunistic free-living amoeba (FLA) pathogen which can cause fatal central nervous system (CNS) infection, granulomatous amoebic encephalitis (GAE) and potentially blinding ocular infection, Acanthamoeba keratitis (AK). Acanthamoeba species remain a challenging protist to treat due to the unavailability of safe and effective therapeutic drugs and their ability to protect themselves in the cyst stage. Natural products and their secondary metabolites play a pivotal role in drug discovery against various pathogenic microorganisms.

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