Lead (Pb) is a heavy metal that alters the oxidation-reduction balance, affecting reproductive health and transfer during pregnancy and lactation. However, the multigenerational impact of exposure to ...low concentrations of Pb on mammalian ovaries has not been assessed. This study evaluated general parameters, histology, redox state (RS), protein carbonylation (PC), lipid peroxidation (LP), and hormone concentrations in the ovaries of mice (CD1® ICR) of three successive generations with both unigenerational (E1) and multigenerational (E2) exposure to 0.2 ppm lead acetate through the drinking water and a control group. Body weight, food consumption, the number of born pups, and their weight after weaning were not significantly affected by Pb exposure in E1 and E2. However, the ovaries of three successive generations of the E1 group, in which only the F0 was exposed, showed alterations in the ovarian histoarchitecture, increase in follicular atresia, decrease in the number of available follicles, and a significant RS and PC elevation that were surprisingly similar to those observed in the E2 group. LP increased in the second generation of E1 and E2, while hormone concentration was not altered. This is the first demonstration that exposure to low concentration of Pb induces multigenerational histological alterations and oxidative stress in mouse ovaries, that the termination of this exposure does not ensure the safety of later generations and that the lack of modifications in general parameters may facilitate the silent development of pathologies that affect ovarian health.
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•Low Pb exposure compromises ovarian health in three successive generations.•Low Pb exposure has multigenerational effects on ovarian histoarchitecture.•Low Pb exposure has multigenerational effects in follicle count.•Low Pb exposure induces multigenerational oxidative stress in mice ovaries.
Background and purpose
To evaluate the incidence and predictors of ischaemic recurrent stroke and the adverse events of antithrombotic therapy in patients with first intra‐ or extracranial vertebral ...artery dissection (VAD) who were treated with aspirin or oral anticoagulation (OA).
Methods
A 21‐year database of consecutive patients with confirmed diagnoses of VAD (n = 110, 63% men; mean age 37.9 ± 8.5 years) without intracerebral hemorrhage and who were treated with aspirin or OA were analyzed retrospectively. In all cases, the admission diagnosis was ischaemic stroke. Three groups were defined according to the site of the dissection: (i) extracranial, (ii) intracranial, and (iii) intra‐/extracranial. Clinical follow‐up was obtained by neurologic examination. Outcome measures were (i) recurrent ischaemic events (ischaemic stroke or transient ischaemic attack) and (ii) intra‐ and extracranial major bleeding.
Results
No difference in age, smoking, or hypertension was found between patients treated with OA (n = 49) and those treated with aspirin (n = 50). Extracranial artery dissection (49%) had preponderance over intracranial (27%) or intra‐/extracranial (23%) location. During the follow‐up, recurrent ischaemic events were rare (one case). There were no bleeding complications. The treatment that was used did not influence the functional outcome or recanalization. A good functional outcome (modified Rankin score ≤ 2) was observed in 82 patients.
Conclusions
Although this was a non‐randomized study, our data suggest that the frequency of recurrent ischaemic stroke in patients with intra‐ or extracranial VAD is low and most likely independent of the type of antithrombotic treatment.
An analytical methodology has been developed for the simultaneous extraction of 13 phenolic compounds, including chlorophenols (CPs), nitrophenols (NTPs), cresols and alkylphenols (APs) in different ...types of wastewater (WW) effluents. A solid-phase extraction (SPE) method has been optimized prior to the determination by gas chromatography coupled to triple quadrupole tandem mass spectrometry (GC-QqQ-MS/MS). Due to the complexity of the matrix, a comparison study of matrix-matched-calibration (MMC) and standard addition calibration (SAC) was carried out for quantification purposes. The optimized procedure was validated using the SAC approach since it provided the most adequate quantification results (in terms of recovery and precision values). Recoveries were in the range 60–135% (0.5μgL−1), 70–115% (1μgL−1), and 78–120% (5μgL−1), with precision values (expressed as relative standard deviation, RSD) ≤30% (except for 2-nitrophenol) involving intra-day and inter-day precision studies. Limits of detection (LODs) and quantification (LOQs) were also evaluated, and LOQs ranged from 0.03μgL−1 to 2.5μgL−1. The proposed method was applied to the analysis of 8 real WW effluent samples, finding some phenolic compounds (e.g. 2-chlorophenol, 2,4,6-trichlorophenol and 4-tert-octylphenol) at concentrations higher than the established LOQs.
Prospective drug-induced liver injury (DILI) registries are important sources of information on idiosyncratic DILI. We aimed to present a comprehensive analysis of 843 patients with DILI enrolled ...into the Spanish DILI Registry over a 20-year time period.
Cases were identified, diagnosed and followed prospectively. Clinical features, drug information and outcome data were collected.
A total of 843 patients, with a mean age of 54 years (48% females), were enrolled up to 2018. Hepatocellular injury was associated with younger age (adjusted odds ratio aOR per year 0.983; 95% CI 0.974–0.991) and lower platelet count (aOR per unit 0.996; 95% CI 0.994–0.998). Anti-infectives were the most common causative drug class (40%). Liver-related mortality was more frequent in patients with hepatocellular damage aged ≥65 years (p = 0.0083) and in patients with underlying liver disease (p = 0.0221). Independent predictors of liver-related death/transplantation included nR-based hepatocellular injury, female sex, higher onset aspartate aminotransferase (AST) and bilirubin values. nR-based hepatocellular injury was not associated with 6-month overall mortality, for which comorbidity burden played a more important role. The prognostic capacity of Hy’s law varied between causative agents. Empirical therapy (corticosteroids, ursodeoxycholic acid and MARS) was prescribed to 20% of patients. Drug-induced autoimmune hepatitis patients (26 cases) were mainly females (62%) with hepatocellular damage (92%), who more frequently received immunosuppressive therapy (58%).
AST elevation at onset is a strong predictor of poor outcome and should be routinely assessed in DILI evaluation. Mortality is higher in older patients with hepatocellular damage and patients with underlying hepatic conditions. The Spanish DILI Registry is a valuable tool in the identification of causative drugs, clinical signatures and prognostic risk factors in DILI and can aid physicians in DILI characterisation and management.
Clinical information on drug-induced liver injury (DILI) collected from enrolled patients in the Spanish DILI Registry can guide physicians in the decision-making process. We have found that older patients with hepatocellular type liver injury and patients with additional liver conditions are at a higher risk of mortality. The type of liver injury, patient sex and analytical values of aspartate aminotransferase and total bilirubin can also help predict clinical outcomes.
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•Clinical parameters can help predict DILI phenotype and outcome.•Older patients with cytolitic DILI and those with liver disease have worse outcome.•Serum AST at DILI onset should be assessed as it strongly predicts poor outcome.•Prognostic potential of Hy’s law in DILI varies between causative agents.
Abstract
Andean glaciers have melted rapidly since the 1960s. While some melting is likely due to anthropogenic climate change driven by increasing greenhouse gases, deposition of light-absorbing ...particles such as black carbon (BC) may also play a role. We hypothesize that BC from fires in the Amazon Basin and elsewhere may be deposited on Andean glaciers, reducing the surface albedo and inducing further melting. Here we investigate the role of BC deposition on albedo changes in the Andes for 2014–2019 by combining atmospheric chemistry modeling with observations of BC in snow or ice at four mountain sites in Peru (Quelccaya, Huascarán, Yanapaccha, and Shallap) and at one site in Bolivia (Illimani). We find that annual mean ice BC concentrations simulated by the chemical transport model GEOS-Chem for 2014–2019 are roughly consistent with those observed at the site with the longest record, Huascarán, with overestimates of 15%–40%. Smoke from fires account for 20%–70% of total wet and dry deposition fluxes, depending on the site. The rest of BC deposited comes from fossil fuel combustion. Using a snow albedo model, we find that the annual mean radiative forcing from the deposition of smoke BC alone on snow ranges from +0.1 to +3.2 W m
−2
under clear-sky conditions, with corresponding average albedo reductions of 0.04%–1.1%. These ranges are dependent on site and snow grain size. This result implies a potentially significant climate impact of biomass burning in the Amazon on radiative forcing in the Andes.
Accelerator based neutrino oscillation experiments seek to measure the relative number of electron and muon (anti)neutrinos at different L / E values. However high statistics studies of neutrino ...interactions are almost exclusively measured using muon (anti)neutrinos since the dominant flavor of neutrinos produced by accelerator based beams are of the muon type. This work reports new measurements of electron (anti)neutrinos interactions in hydrocarbon, obtained by strongly suppressing backgrounds initiated by muon flavor (anti)neutrinos. Double differential cross sections as a function of visible energy transfer, E avail , and transverse momentum transfer, p T , or three momentum transfer, q 3 are presented. Published by the American Physical Society 2024
A quick, easy, cheap, effective, rugged and safe (QuEChERS)-based extraction method has been optimized for the determination of pentachlorophenol, 4-tertoctylphenol and 4-nonylphenol in river ...sediments. The extraction method was followed by gas chromatography-triple quadrupole tandem mass spectrometry (GC-QqQ-MS/MS) analysis, which ensures the reliable identification of the target compounds. The proposed method has been validated allowing the successful determination of the selected compounds, with recoveries ranging from 72 to 96%, when three concentration levels were evaluated (10, 50 and 100μgkg−1) and inter-day and intra-day precision, expressed as relative standard deviation (RSD), were lower than 20%. The method showed limits of detection (LODs) and limits of quantification (LOQs) ranging from 0.1 to 2.0μgkg−1 and from 0.5 to 5.0μgkg−1, respectively. Finally, 25 real samples from Poland have been analyzed, and only 4-tertoctylphenol was detected at concentrations up to 8.9μgkg−1 of soil dry weight.
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•Occurrence of phenolic compounds in river bottom sediments from Poland.•A QuEChERS method has been developed followed by GC-QqQ-MS/MS.•Samples from agricultural and industrial areas were monitored.•Only 4-tertoctylphenol was found in all the samples at low concentrations.
In the fifth-generation mobile communications networks, several resource allocation techniques have been used, such as static allocation and dynamic algorithms (greedy or matching theory); this work ...proposes a new subcarrier allocation scheme based on the evaluation of the instantaneous behaviour of the wireless channel using the condition number of the channel matrix ${\bi H}$H. Simulation results reveal that the proposed scheme increases the total sum rate of the system, compared to their predecessors.
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