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In vivo antimicrobial activity of engineered mesoporous silica nanoparticles targeting intracellular mycobacteria.

Treatments of Mycobacterium marinum, a common non-tuberculous mycobacterium associated with cutaneous infections are very challenging, emphasizing the development of new therapeutic approaches. Here we report the functionalization of mesoporous silica nanoparticles (MSN) with a series of triphenylphosphonium (TPP) substituents, which endowed them with affinity towards the surface of M. marinum in vitro, as well as within infected THP-1 cells. The presence of these nanoparticles at the bacterial surface prevents their uptake by human macrophages and dendritic cells. When loaded with doxycycline…

CeO2 Nanoparticles Reduce Oxidative Stress and Delay the Degeneration of Intervertebral Disc.

The oxidative stress of the body can destroy the homeostasis and lead to a series of adverse outcomes. In recent years, nano-enzyme materials, as a new hotspot in materials science, have been gradually applied in various fields because of their enzyme-like activities at the nanoscale and their ability to regulate various physiological processes in organisms. In this study, we developed a novel cerium oxide (CeO2) nano-enzyme drug and demonstrated that the nano-enzyme can effectively improve oxidative stress levels and delay disc degeneration in rats. The experimental results confirmed that in

Targeted Sustained-Release Therapy for Vulnerable Atherosclerotic Plaques Using Luteolin-Loaded Nanoparticles.

PURPOSE: The early, precise, and safe management of vulnerable atherosclerotic plaques (VAPs) remains a formidable clinical challenge. Here, we present a targeted nanotherapeutic approach in which osteopontin-targeted nanoparticles encapsulate luteolin (NPs-Lut) for the precise delivery and treatment of VAPs. This engineered system enables site-specific accumulation and sustained release of luteolin at plaque sites. METHODS: We innovatively constructed an osteopontin-targeted drug delivery system designed for vulnerable atherosclerotic plaques, in which luteolin and atorvastatin were successf…

Sentinel node mapping with carbon nanoparticles versus lymphadenectomy in early cervical cancer.

OBJECTIVE: To evaluate the morbidity of sentinel lymph node (SLN) biopsy with carbon nanoparticle suspension mapping compared to pelvic lymphadenectomy in patients with early-stage cervical cancer. METHODS: This prospective study consecutively enrolled patients who were diagnosed pre-operatively with 2018 International Federation of Gynecology and Obstetrics (FIGO) stage IA2 to IB1 cervical cancer with histologically confirmed squamous-cell carcinoma or adenocarcinoma. Randomization was performed before surgery, and participants were assigned to undergo a SLN biopsy with carbon nanoparticle s

Формирующиеся подходы к разрядке нейронных клеток Дегенерации с помощью усовершенствованных полиэлектролитных систем.

Борьба с нейродегенеративными заболеваниями (НБ) представляет собой многогранную проблему в стареющих обществах западных стран. Каждый год миллионы людей во всем мире страдают от таких болезней, как болезнь Паркинсона (PD), болезнь Альцгеймера (AD), болезнь Хантингтона (HD), множественный склероз (MS), травма спинного мозга, ишемический инсульт, болезнь моторных нейронов, атрофия спинного мозга, спинномозговая атаксия и амиотропический боковой склероз (ALS). Совершенствование современных технологий производства биоматериалов открывает широкие возможности в области регенеративной медицины. Тем

Совпадение в аннотации оригинала
Counteracting neurodegenerative diseases (NDs) presents a multifaceted challenge in the aging societies of Western countries. Each year, mil … types with which they are intended to interact. Such an opportunity creates nanomaterials involving nanoparticles. The surface chemistry of nanoparticles, especially when functionalized with bioactive agents, enhances biocompatibility and facilitates interactions with nervous cells. Herein, we review contemporary strategies in the application of biomaterials fo …

Prenatal Silicon Dioxide Nanoparticles Exposure Reduces Female Offspring Fertility Without Affecting Males.

Silicon dioxide nanoparticles (SiO2 NPs) are widely utilized in biomedicine due to their controllable size and biocompatibility. While previous studies have demonstrated that prenatal exposure to SiO2 NPs can traverse the placental barrier and induce neurotoxicity in offspring. However, their reproductive toxicity remains unclear. Here, it is found that prenatal SiO2 NPs exposure led to subfertility in female offspring, evidenced by decreased ovulation potential, ovarian reserve, and litter size. In contrast, male offspring maintained normal sperm production and fertility. Mechanistic analyses…

Physical/mechanical and antibacterial properties of composite resin modified with selenium nanoparticles.

BACKGROUND: Accumulation of biofilm over composite resin restorations is one of the principal causes of recurrent caries. Therefore, this study aimed to develop antibacterial composite resins by crystalline selenium nanoparticles (SeNPs), assessing the antibacterial, mechanical, and physical properties of the composite resin after SeNPs incorporation. METHODS: SeNPs were synthesized via a green method. The nanoparticles were characterized by UV-Vis spectroscopy, fourier transform infrared (FT-IR) spectroscopy and transmission electron microscopy (TEM). The nano-filled composite (Filtek™ Z350X…

Neuroprotective effects of coffee-derived exosome-like nanoparticles against Aβ-induced neurotoxicity.

The present study aimed to provide experimental evidence that CDELNs (coffee-derived exosome-like nanoparticles) may be a candidate for the treatment or prevention of amyloid-β (Aβ)-induced Alzheimer's disease (AD). An in vitro Alzheimer's model was created with Aβ-induced toxicity in mouse hippocampal neuronal cells (HT-22). Aβ(1-42)-exposed cells were treated with different concentrations of CDELNs (1-50 μg/ml) and the viability of cells was analyzed. The change in the mitochondrial membrane potential (ΔΨm) of cells was also determined. CDELNs treatment increased the viability of Aβ(1-42 )-t…

Selenium nanoparticles affect chicken offspring's intestinal health better than other selenium sources.

This study aimed to assess the effects of maternal diets containing various selenium (Se) sources on the intestinal mucosal function in the jejunum of chicken offspring. A total of 630, 18-wk-old Hy-Line Grey hens and 70 18-wk-old Hy-Line Grey breeders were randomly allocated into 7 groups, with 5 replicates in each group (18 hens and tow roosters). After 4 wk of Se depletion, the birds were fed either a nonsupplemented basal diet (control) or the same basal diet supplemented with 0.15 mg/kg selenium nanoparticles (Nano-Se), 0.30 mg/kg Nano-Se, 0.30 mg/kg selenocysteine (Sec), 0.30 mg/kg sodiu…

Understanding Bacterial Resistance to Heavy Metals and Nanoparticles: Mechanisms, Implications, and Challenges.

Antimicrobial resistance is a global health problem as it contributes to high mortality rates in several infectious diseases. To address this issue, engineered nanoparticles/nano-formulations of antibiotics have emerged as a promising strategy. Nanoparticles are typically defined as materials with dimensions up to 100 nm and are made of different materials such as inorganic particles, lipids, polymers, etc. They are widely dispersed in the environment through various consumer products, and their clinical applications are diverse, ranging from contrast agents in imaging to carriers for gene and…

PEG-PLGA nanoparticles deposited in Pseudomonas aeruginosa and Burk h olderia cenocepacia.

In our prior research, polymer nanoparticles (NPs) containing tobramycin displayed robust antibacterial efficacy against biofilm-embedded Pseudomonas aeruginosa (P. aeruginosa) and Burkholderia cenocepacia (B. cenocepacia) cells, critical pathogens in cystic fibrosis. In the current study, we investigated the deposition of a nanoparticulate carrier composed of poly(d,l-lactic-co-glycolic acid) (PLGA) and poly(ethylene glycol)-block-PLGA (PEG-PLGA) that was either covalently bonded with cyanine-5-amine (Cy5) or noncovalently bound with freely embedded cationic rhodamine B (RhB), which served as…

Exploring chitosan nanoparticles for enhanced therapy in neurological disorders: a comprehensive review.

Chitosan nanoparticles have emerged as a promising therapeutic platform for treating neurological disorders due to their biocompatibility, biodegradability, and ease of functionalization. One of the significant challenges in treating neurological conditions is overcoming the blood-brain barrier (BBB), which restricts the effective delivery of therapeutic agents to the brain. Addressing this barrier is crucial for the successful treatment of various neurological diseases, including Alzheimer's disease, Parkinson's disease, epilepsy, migraine, psychotic disorders, and brain tumors. Chitosan nano…

Targeting macrophages with multifunctional nanoparticles to detect and prevent atherosclerotic cardiovascular disease.

Despite the emergence of novel diagnostic, pharmacological, interventional, and prevention strategies, atherosclerotic cardiovascular disease remains a significant cause of morbidity and mortality. Nanoparticle (NP)-based platforms encompass diverse imaging, delivery, and pharmacological properties that provide novel opportunities for refining diagnostic and therapeutic interventions for atherosclerosis at the cellular and molecular levels. Macrophages play a critical role in atherosclerosis and therefore represent an important disease-related diagnostic and therapeutic target, especially give

Assessing trans-endothelial transport of nanoparticles for delivery to abdominal aortic aneurysms.

Abdominal aortic aneurysms (AAAs) are localized, rupture-prone expansions of the abdominal aorta wall. In this condition, structural extracellular matrix (ECM) proteins of the aorta wall, elastic fibers and collagen fibers, that impart elasticity and stiffness respectively, are slowly degraded by overexpressed matrix metalloproteinases (MMPs) following an injury stimulus. We are seeking to deliver therapeutics to the AAA wall using polymer nanoparticles (NPs) that are capable of stimulating on-site matrix regeneration and repair. This study aimed to determine how NP shape and size impacts endo…

Enhanced Antibacterial Activity of Levofloxacin with Cucurbit[7]uril-Functionalized Gold Nanoparticles.

Bacterial infection is one of the major concerns of the growing society, and over the years, different permutations and combinations of various drugs and adjuvants have been attempted, which led to considerable improvements in the efficacy of the antibacterial drugs. In this regard, macrocyclic receptors such as cyclodextrin, cucurbiturils, calixarene, etc., have played a major role by modulating the drug properties that supplement the antibacterial efficacy. In this study, we have developed cucurbit[7]uril (CB7)-functionalized Au nanoparticles (CB7AuNPs) to modulate the activity of an antibio…

Construction of Magnolol Nanoparticles for Alleviation of Ethanol-Induced Acute Gastric Injury.

Ethanol (EtOH) has been identified as a potential pathogenic factor in gastric ulcer development primarily due to its association with gastric injury and excessive production of reactive oxygen species. Magnolol (Mag), the principal active compound in Magnolia officinalis extract, is well studied for its notable anti-inflammatory and antioxidant properties. However, its limited solubility, propensity for agglomeration, and low absorption and utilization rates significantly restrict its therapeutic use. This study aims to overcome these challenges by developing a Mag nanoparticle system targeti

Antibacterial activity of green synthesized copper oxide nanoparticles against multidrug-resistant bacteria.

Using plant extracts in the green synthesis of nanoparticles has become an environmentally acceptable approach. In our study, copper oxide nanoparticles (CuO NPs) were synthesized using ethanolic extracts of Azadirachta indica and Simmondsia chinensis. CuO NP formation was confirmed by the change in color and by UV‒visible spectroscopy (CuO NPs peaked at a wavelength of 344 nm). TEM images confirmed the semispherical shape of the CuO NPs, with particle sizes ranging from 30.9 to 10.7 nm. The antibacterial activity of these NPs was evaluated by using the agar diffusion method against clinical i…

Compatibility and antimicrobial activity of silver nanoparticles synthesized using Lycopersicon esculentum peels.

Nanoparticles have gained worldwide attention as a new alternative to chemical control agents due to their special physiochemical properties. The current study focused on the environmentally friendly synthesis of silver nanoparticles (AgNPs) using Lycopersicon esculentum peel. In addition to studying the intrinsic cytotoxic effectiveness of Le-AgNPs contribute to their antibacterial, and antifungal activities and the effect of nanoparticles on the integrity of their morphological behavior. The initiative biosynthesis of L. esculentum silver nanoparticles (Le-AgNPs) was indicated by the color c…

Mercaptoimidazole-capped gold nanoparticles as a potent agent against plant pathogenic fungi.

Plant pathogenic fungi pose a substantial challenge to agricultural production, but the conventional fungicide-based approaches are losing importance. As agents with broad-spectrum antibacterial effects, gold nanoparticles (Au NPs) are found to have antifungal effects; however, no study has examined their application in agriculture as fungicides. Accordingly, this study investigates the activity of 2-mercaptoimidazole-capped Au NPs (MI-Au NPs) against the 'top' plant pathogenic fungi, finding that they could inhibit Magnaporthe oryzae, Botrytis cinerea, Fusarium pseudograminearum and Colletotr…