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8% being contributed by intracellular accumulation. This work suggests that Cr(VI) reduction and intracellular accumulation are the main mechanisms involved in Cr(IV) biosorption onto algal-bacterial AGS.Hydraulic fracturing creates large volumes of flowback and produced water (FPW). The waste is a complex mixture of organic and inorganic constituents. Although the acute toxicity of FPW to freshwater organisms has been studied, few have attempted to discern the interaction between organic and inorganic constituents within this matrix and its role in toxicity. In the present study, bioaccumulation assays (7-d uptake and 7-d elimination period) with FPW (1% dilution) were conducted with the freshwater oligochaete, Lumbriculus variegatus, to evaluate the toxicokinetics of inorganic elements. To evaluate the interacting role of organics, bioaccumulation of elements in unmodified FPW was compared to activated carbon treated FPW (AC-modified). Differences in uptake and elimination rates as well as elimination steady state concentrations between unmodified and AC-modified treatments indicated that the organics play an important role in the uptake and depuration of inorganic elements in FPW. These differences in toxicokinetics between treatments aligned with observed growth rates in the worms which were higher in the AC-modified treatment. Whether growth differences resulted from increased accumulation and changes in toxicokinetic rates of inorganics or caused by direct toxicity from the organic fraction of FPW itself is still unknown and requires further research.Despite the ubiquity of cypermethrin (CYP) stereoisomers in environment biota, the stereoisomeric selectivity of endocrine-disrupting potency of α-CYP, β-CYP, and θ-CYP has not been well studied. In this study, dual-luciferase reporter gene assays were adopted to analyze their potential endocrine-disrupting effects via four receptors (ERα, GRα, MR and RXR). The results showed that α-CYP was antagonistic to ERα, GRα, and MR with RIC20 of 9.1 × 10-7, 7.6 × 10-7, and 1.0 × 10-6 M, respectively. β-CYP exhibited only ERα-mediated agonistic activity with a REC20 of 2.1 × 10-6 M. None of the CYP stereoisomers interacted with RXR. Molecular docking indicated that α-CYP had the strongest binding capacity to GRα among the compounds. The expression levels of steroid hormone-related genes in human adrenocortical carcinoma (H295R) cells displayed that all three compounds inhibited the transcription of 3-βHSD, indicating the block of turning cholesterol into different hormones. Both α-CYP and β-CYP upregulated genes encoding estrogen- and aldosterone-forming enzymes including 17-βHSD, CYP19, STAR, and CYP11B2. Mortality and malformation toxicity assays in zebrafish embryos revealed that the order of toxicity was α-CYP > β-CYP > θ-CYP. Our results indicated that α-CYP may pose the strongest endocrine-disrupting effects. The data provided here will be helpful to systematically understand stereoisomeric selectivity in the endocrine-disrupting effects of cypermethrin.
A systematic review and meta-analysis was conducted to assess breast cancer (BC) outcomes among patients with early-stage hormone receptor positive (HR+), human epidermal growth factor receptor 2-negative (HER2-) BC, receiving adjuvant endocrine therapy.
Randomized controlled trials (RCTs) and real-world evidence (RWE) studies were identified using Ovid MEDLINE®, Embase, and Evidence-Based Medicine Reviews. Clinical and methodological similarities including alignment of outcome definitions with standardized definitions for efficacy endpoints criteria were assessed to evaluate feasibility of conducting a meta-analysis. Where feasible, 5-year probabilities of BC recurrence or death were estimated using a Bayesian hierarchical arm-based model.
Of 21 included studies, 8 RCTs and 4 RWE studies reported outcome data of interest. There was heterogeneity in outcome reporting, as well as variation in recurrence risk amongst studies with aligned reporting. Of the 12 studies, 10 were considered for inclusion in a meta-analysis of BC recurrence or death. Only a subgroup analysis of node-positive patients (3 studies; n=7307) was deemed feasible. The 5-year probability of BC recurrence or death was 17.2% (95% credible interval 14.6%-20.3%).
Although studies reporting recurrence outcomes were limited, there remains a high risk of BC recurrence, especially among node-positive patients. Approximately 1 in 6 women with node-positive HR+/HER2- early-stage BC receiving endocrine therapy experience recurrence or death within 5-years of initiating treatment, suggesting a need for novel treatments for this population.
Although studies reporting recurrence outcomes were limited, there remains a high risk of BC recurrence, especially among node-positive patients. Approximately 1 in 6 women with node-positive HR+/HER2- early-stage BC receiving endocrine therapy experience recurrence or death within 5-years of initiating treatment, suggesting a need for novel treatments for this population.
Dual antiplatelet therapy (DAT) is a therapeutic option for patients with minor ischemic stroke (IS) or transient ischemic attack (TIA). Fasiglifam in vitro No study has evaluated the incidence of early bleeding in patients with moderate to major ischemic stroke. The current study aimed to analyze both the frequency of early bleeding and hospital morbidity related to DAT for either acute IS or TIA regardless of admission National Institute of Health Stroke Scale (NIHSS) score.
This was a retrospective analysis based on data collected from a prospective data bank of a single center. We included patients who underwent DAT in the first 24 hours of symptom onset with a loading dose (aspirin 300 mg + clopidogrel 300 mg) on the first day, followed by a maintenance dose (aspirin 100 mg + clopidogrel 75 mg). We analyzed intracranial and/or extracranial hemorrhage that had occurred during the hospital admission, symptomatic bleeding, modified Rankin Scale (mRS) score at discharge, and death rates as outcomes.
Of the 119 patients analyzed, 94 (79 %) had IS and 25 (21 %) had TIA. Hemorrhage occurred in 11 (9.2 %) and four (3.4 %) patients with TIA or NIHSS≤3, respectively, although none were symptomatic. Patients with bleeding as a complication had higher admission NIHSS [4 (3-7) vs. 2 (1-4), p = 0.044] and had higher mRS at discharge (mRS 2 [1-5] vs. mRS 1 [0-2], p = 0.008). These findings did not indicate increased mortality, as one (9 %) patient died from bleeding and two (1.8 %) patients died without bleeding (p = 0.254).
DAT seems to be a safe therapy in patients regardless of admission NIHSS if started within the first 24h after symptom onset because only 1.6 % of patients had symptomatic bleeding.
DAT seems to be a safe therapy in patients regardless of admission NIHSS if started within the first 24 h after symptom onset because only 1.6 % of patients had symptomatic bleeding.
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