8,949 results match your criteria: "Institute of Toxicology[Affiliation]"

Application of UHPLC-QqQ-MS/MS Method for Quantification of Beta-Adrenergic Blocking Agents (β-Blockers) in Human Postmortem Specimens.

Molecules

September 2024

Faculty of Medicine, Department of Social Sciences and Infectious Diseases, Wroclaw University of Science and Technology, 27 Wybrzeże Wyspiańskiego, 50370 Wroclaw, Poland.

Article Synopsis
  • - Betablockers, commonly used in cardiology, can cause severe health issues like drops in blood pressure and heart rhythm problems, making their detection in cases of poisoning challenging.
  • - A new liquid-liquid extraction (LLE) method using ethyl acetate at pH 9 effectively identified 18 β-blockers in human blood, with a low limit of quantification and excellent precision, accuracy, and recovery rates.
  • - The method has been validated with real postmortem samples and provided high-resolution fragmentation spectra for certain compounds not previously available in databases.
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Fabrication and evaluation of chitosan-coated nanostructured lipid carriers for co-delivery of paclitaxel and PD-L1 siRNA.

Int J Pharm

December 2024

College of Pharmacy and Institute of Drug Research & Development, Chungnam National University, 99 Daehak-ro, Yuseong-gu, Daejeon 34134, Republic of Korea. Electronic address:

This study aimed to develop a nanostructured lipid carrier (NLC) capable of co-delivering paclitaxel (PTX) and programmed death-ligand 1 (PD-L1) small interfering RNA (siRNA) to enhance PTX bioavailability and bolster immunity through PD-L1 knockdown. We prepared a PTX-loaded NLC (P-NLC) and coated it with positively charged chitosan (Chi) to create P-NLC-Chi, which was subsequently conjugated to siRNA (P-NLC-Chi-siRNA). The P-NLC-Chi formulation was optimized using the Box-Behnken design.

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Acute toxicity assessment and QSAR modeling of zebrafish embryos exposed to methyl paraben and its halogenated byproducts.

J Environ Manage

November 2024

Division of Biotechnology, College of Environmental and Bioresource Sciences, Jeonbuk National University, Iksan, Jeonbuk, 54596, Republic of Korea. Electronic address:

Halogenated methyl parabens are formed readily during water chlorination, with or without bromide ion presence. However, research gaps persist in in vivo toxicological assessments of vertebrates exposed to halo-MePs. To address this gap, this study evaluated acute toxicities at 24-96 h-post-fertilization in zebrafish embryos exposed to methyl paraben and its mono- or di-halogenated derivatives, using various apical endpoints.

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METTL3-regulated m6A modification of lncRNA E230001N04Rik is involved in myofibroblast differentiation in arsenic-induced pulmonary fibrosis through promoting senescence of lung epithelial cells.

J Hazard Mater

December 2024

Center for Global Health, The Key Laboratory of Modern Toxicology, Ministry of Education, School of Public Health, Suzhou Institute for Advanced Study of Public Health, Gusu School, Nanjing Medical University, Nanjing 211166, Jiangsu, PR China; Jiangsu Key Laboratory of Cancer Biomarkers, Prevention and Treatment, Collaborative Innovation Center for Cancer Medicine, School of Public Health, Nanjing Medical University, Nanjing 211166, Jiangsu, PR China. Electronic address:

Arsenic is a toxic agent that causes respiratory damage. Long non-coding RNAs (lncRNAs) are non-coding transcripts that adsorb specific miRNAs and regulate biological processes of human diseases. N6-Methyladenosine (m6A) is an internal modification of RNAs.

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Article Synopsis
  • Microalgae, particularly Chlorella vulgaris, are being studied as health-boosting feed additives in aquaculture, specifically for Atlantic salmon, due to their ability to enhance immune function and manage stress responses.
  • In the study, salmon were fed diets with varying levels of C. vulgaris and showed improved feed conversion and protein retention, with notable changes in gut microbial diversity and composition after feeding on higher amounts of the algae.
  • Exposure to a stressor (peracetic acid) revealed that fish on higher algae diets exhibited less transcriptional stress response and increased antioxidant protein levels, suggesting that C. vulgaris may help mitigate stress effects in aquatic species.
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  • Chemotherapeutics often cause muscle wasting, known as cachexia, which is crucial to understand for improving cancer treatments.
  • This study focused on Sorafenib, a tyrosine kinase inhibitor, revealing that it disrupts muscle cell function by altering gene transcription and reducing an important epigenetic marker.
  • Unique to Sorafenib, this disruption affected muscle cell assembly and function, while other TKIs like Nilotinib and Imatinib did not have the same impact, suggesting new strategies for reducing chemotherapy-induced cachexia.
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  • Collaborative learning, especially through small group teaching, has become increasingly relevant in medical education, particularly after the shift to online formats due to the Covid-19 pandemic.
  • This study focused on 263 medical students to explore the connection between group metacognition and teamwork satisfaction after participating in online small group tutorials.
  • Results indicated that most dimensions of group metacognition (knowledge of cognition, planning, and evaluating) positively influenced teamwork satisfaction, emphasizing the importance of these skills in enhancing collaborative online learning experiences.
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Allergic potential & molecular mechanism of skin sensitization of cinnamaldehyde under environmental UVB exposure.

Chemosphere

November 2024

Photobiology Laboratory, Drug and Chemical Toxicology Group, FEST Division, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, Uttar Pradesh, India. Electronic address:

Fragrance, a key ingredient in cosmetics, often triggers skin allergy causes rashes, itching, dryness, and cracked or scaly skin. Cinnamaldehyde (CA), derived from the bark of the cinnamon tree, used as a fragrance and is a moderate skin sensitizer. CA exhibits strong UVB absorption, its allergic potential and the molecular mechanisms underlying skin sensitization under UVB exposure remain largely unexplored.

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Article Synopsis
  • This longitudinal study evaluated how modern radiotherapy (RT) techniques impact the quality of life (QOL) for head and neck cancer patients over time after treatment.
  • Participants completed various QOL questionnaires at three intervals after RT, focusing on symptoms, functioning, and overall well-being.
  • Results showed that while global QOL and physical functions improved significantly from 2 weeks to 3 months post-RT, there were no significant changes noticed between 3 months and 6 months.
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Patients with diabetes mellitus (DM) are at risk of developing frailty, but studies rarely addressed risk factors for frailty worsening. We investigated whether blood pressure (BP)-lowering agents influenced such risk in these patients. Adults with type 2 DM were identified from National Taiwan University Hospital, with the primary outcome, the worsening of frailty by ≧1 score increase of FRAIL scale determined.

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Introduction: Limited data have addressed frailty's role in cardiorenal risk among older adult patients with chronic kidney disease (CKD). We investigated whether frailty could predict major renal and cardiovascular events, healthcare utilization, and mortality in these patients.

Methods: We conducted a prospective cohort enrolling patients aged ≥75 years with a stable estimated glomerular filtration rate (eGFR) <60 mL/min/1.

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Article Synopsis
  • * It's important to carefully choose the right medicines and blood pressure goals to help these patients without causing more problems.
  • * Families and caregivers should help in making decisions about treatment to make sure it fits what the patient needs and keeps them safe.
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Despite the continued clinical application of traditional herbal medicines, scientific evidence such as toxicological safety profile of Yongdamsagan-tang water extract (YSTW) has not yet been established. The purpose of this study was to investigate the potential toxicity profile of YSTW following a 13-week repeated oral administration at various concentrations to Sprague Dawley rats. YSTW was administered orally to rats once daily at doses of 0, 1000, 2000, and 5000 mg/kg bw/day for 13 weeks.

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Nanoarchitectonics of tunable aminosalicylate sodium encapsulated gold nanoparticles enabling multi-faceted role as capping, reducing, stabilizing and colorimetric detection of metal ions.

Nanotechnology

October 2024

Nanomaterial Toxicology Laboratory, Drug and Chemical Toxicology Group, Food, Drug & Chemical, Environment and Systems Toxicology (FEST) Division, CSIR-Indian Institute of Toxicology Research (CSIR-IITR), Vishvigyan Bhawan, 31 Mahatma Gandhi Marg, Lucknow 226001, India.

Despite all the advancements in aqueous synthesis of gold nanoparticles, certain features like one-pot/one-step method with minimal reactants using greener solvents are still demanding. The challenge in the aqueous phase synthesis is to balance the nucleation and precise growth of nanoparticles avoiding aggregation. In this work, we report a unique versatile unexplored molecule aminosalicylate sodium (Na-4-ASA) which functions as a capping, reducing, stabilizing and more interestingly as an encapsulating agent for gold nanoparticles.

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There is growing concern that sprayed neonicotinoid pesticides () persist in mixed forms in the environmental soil and water systems, and these concerns stem from reports of increase in both the detection frequency and concentration of these pollutants. To confirm the toxic effects of , we conducted toxicity tests on two , clothianidin (CLO) and imidacloprid (IMD), in embryos of zebrafish. Toxicity tests were performed with two different types of mixtures: potential mixture compounds and realistic mixture compounds.

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Development and validation of multiresidue analysis method for biomonitoring of pesticides and metabolites in human blood and urine by LC-QToF-MS.

Talanta

January 2025

Analytical Sciences Group, ASSIST Division, CSIR-Indian Institute of Toxicology Research, (CSIR-IITR), Vishvigyan Bhawan, 31, Mahatma Gandhi Marg, Lucknow, 226001, Uttar Pradesh, India; Academy of Scientific and Innovative Research (AcSIR), Ghaziabad, 201002, India. Electronic address:

The widespread use of pesticides and their consequential presence in the environment is a growing concern due to the harmful health effects associated with pesticide exposure. For clinical and toxicology laboratories, a method for simultaneously determining these compounds and their metabolic products in body fluids, such as blood and urine, is important. In the present study, a rapid, sensitive and simultaneous LC-QToF-MS method for detecting multiclass pesticides and metabolites in blood and urine samples has been developed and validated.

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Ex vivo modelling of cardiac injury identifies ferroptosis-related pathways as a potential therapeutic avenue for translational medicine.

J Mol Cell Cardiol

November 2024

Institute of Molecular and Translational Therapeutic Strategies (IMTTS), Hannover Medical School, Hannover, Germany; Center for Translational Regenerative Medicine, Hannover Medical School, Hannover, Germany. Electronic address:

Article Synopsis
  • Heart failure (HF) is a rising global health issue often related to cardiac injury, linked to high mortality rates and insufficient treatment options; ferroptosis, an iron-dependent cell death, may play a significant role in heart disease.
  • This study aimed to create an ex-vivo model using living myocardial slices (LMS) to explore mechanisms and identify potential drug targets related to myocardial injury.
  • Results showed that cryoinjured rat LMS exhibited symptoms like contractile dysfunction and inflammation, with ferroptosis playing a notable role; treatment with ferrostatin (Fer-1) improved cardiac function and reduced damage, indicating a promising therapeutic avenue.
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This study, conducted in Agra, India, examined the mass concentrations, chemical compositions, and seasonal variations of submicron particles (PM). The concentrations of metals, water-soluble inorganic ions (WSIs) including anions (F, Cl, NO₃, SO₄) and cations (Ca, K, Mg, NH₄, Na), organic carbon (OC) and elemental carbon (EC) and polycyclic aromatic hydrocarbons (PAHs) in PM extract were determined using Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES), Ion Chromatography, Thermogravimetric Analysis and Gas Chromatography-Mass Spectrometry (GC-MS) respectively. For morphological observation of PM particles, Field Emission Scanning Electron Microscopy-Energy Dispersive X-ray spectrometry (FESEM-EDS) was used.

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Background: Imperatorin is a naturally occurring furocoumarin derivative found in traditional Chinese medicine Angelica dahurica for its anticancer, antihypertensive, and antidiabetic properties. Chronic kidney disease (CKD) is a global health issue, characterized by a high prevalence, significant morbidity and mortality, and a range of related complications.

Objective: This study aims to investigate the protective effects of imperatorin treatment and the specific underlying mechanisms in progressive CKD.

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Anti-Amnesic Effect of on Scopolamine-Induced Memory Impairment in Mice.

Pharmaceuticals (Basel)

September 2024

College of Veterinary Medicine and BK21 FOUR Program, Chonnam National University, Gwangju 61186, Republic of Korea.

, a traditional Asian herbal medicine, is primarily used for digestive problems; yet, its cognitive benefits remain unexplored. This study evaluated the anti-amnesic effects of extract (ARE) on scopolamine (SCO)-induced memory impairment in mice. Mice received 100 or 200 mg/kg ARE orally for 5 days, followed by SCO injection.

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Development of the PD9-9 Monoclonal Antibody for Identifying Porcine Bone Marrow-Derived Dendritic Cells.

Life (Basel)

August 2024

Department of Stem Cell and Regenerative Biotechnology, KU Institute of Science and Technology (KIT), Konkuk University, Seoul 05029, Republic of Korea.

The purpose of this study was to develop a monoclonal antibody (mAb) that can identify porcine dendritic cells (DCs) that have differentiated from bone marrow progenitor cells. Hybridoma technology was used to obtain mAbs, and bone marrow-derived DCs (BMDCs) were employed as immunogens for producing antibodies. The generated PD9-9 mAbs exhibited considerable reactivity towards porcine BMDCs with applications in flow cytometry and immunostaining.

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Sepsis is an inflammatory condition causing organ failure due to an uncontrolled immune response to infection and remains a significant challenge. Crotonis Semen has displayed various pharmacological effects, yet its potential in protecting against sepsis and the mechanisms involved remains largely unclear. Here, we explored the antiseptic properties of Crotons Semen extract (CSE) in both LPS-stimulated J774 macrophages and mice subjected to sepsis through Cecal ligation and Puncture (CLP) or LPS induction.

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Mitochondrial transplantation attenuates lipopolysaccharide-induced acute respiratory distress syndrome.

BMC Pulm Med

September 2024

Paean Biotechnology, Inc. 5 Samil-daero8-gil, Jung-gu, Seoul, 04552, Korea.

Article Synopsis
  • Mitochondria are crucial for energy production, inflammation regulation, and cell death, and their dysfunction is linked to several diseases, including ARDS, which is a severe lung condition.* -
  • The study explored mitochondrial transplantation from human stem cells as a potential treatment for ARDS, utilizing both in vitro (lab-based) and in vivo (animal model) approaches to assess its effectiveness.* -
  • Findings indicated that the transplanted mitochondria helped reduce inflammation and prevent cell death in lung cells, suggesting this method could serve as a promising new therapy for ARDS.*
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Although polyethylene terephthalate (PET) fibers are a representative form of plastic pollutants, studies on their toxicity are currently limited compared to other plastic types. Moreover, the effect of natural organic matter (NOM) on their toxicity has not been investigated. In this study, female and male adult zebrafish were exposed to synthesized PET fibers at concentrations of 0.

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