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Scientific Reports May 2024Transforming growth factor-β (TGF-β) signaling plays a significant role in multiple biological processes, including inflammation, immunity, and cell death. However,...
Transforming growth factor-β (TGF-β) signaling plays a significant role in multiple biological processes, including inflammation, immunity, and cell death. However, its specific impact on the cochlea remains unclear. In this study, we aimed to investigate the effects of TGF-β signaling suppression on auditory function and cochlear pathology in mice with kanamycin-induced ototoxicity. Kanamycin and furosemide (KM-FS) were systemically administered to 8-week-old C57/BL6 mice, followed by immediate topical application of a TGF-β receptor inhibitor (TGF-βRI) onto the round window membrane. Results showed significant TGF-β receptor upregulation in spiral ganglion neurons (SGNs) after KM-FA ototoxicity, whereas expression levels in the TGF-βRI treated group remained unchanged. Interestingly, despite no significant change in cochlear TGF-β expression after KM-FS ototoxicity, TGF-βRI treatment resulted in a significant decrease in TGF-β signaling. Regarding auditory function, TGF-βRI treatment offered no therapeutic effects on hearing thresholds and hair cell survival following KM-FS ototoxicity. However, SGN loss and macrophage infiltration were significantly increased with TGF-βRI treatment. These results imply that inhibition of TGF-β signaling after KM-FS ototoxicity promotes cochlear inflammation and SGN degeneration.
Topics: Animals; Kanamycin; Signal Transduction; Ototoxicity; Transforming Growth Factor beta; Mice; Spiral Ganglion; Mice, Inbred C57BL; Cochlea; Hair Cells, Auditory; Furosemide; Male
PubMed: 38740884
DOI: 10.1038/s41598-024-61630-1 -
Physiological Reports May 2024The pathophysiology behind sodium retention in heart failure with preserved ejection fraction (HFpEF) remains poorly understood. We hypothesized that patients with HFpEF...
The pathophysiology behind sodium retention in heart failure with preserved ejection fraction (HFpEF) remains poorly understood. We hypothesized that patients with HFpEF have impaired natriuresis and diuresis in response to volume expansion and diuretic challenge, which is associated with renal hypo-responsiveness to endogenous natriuretic peptides. Nine HFpEF patients and five controls received saline infusion (0.25 mL/kg/min for 60 min) followed by intravenous furosemide (20 mg or home dose) 2 h after the infusion. Blood and urine samples were collected at baseline, 2 h after saline infusion, and 2 h after furosemide administration; urinary volumes were recorded. The urinary cyclic guanosine monophosphate (ucGMP)/plasma B-type NP (BNP) ratio was calculated as a measure of renal response to endogenous BNP. Wilcoxon rank-sum test was used to compare the groups. Compared to controls, HFpEF patients had reduced urine output (2480 vs.3541 mL; p = 0.028), lower urinary sodium excretion over 2 h after saline infusion (the percentage of infused sodium excreted 12% vs. 47%; p = 0.003), and a lower baseline ucGMP/plasma BNP ratio (0.7 vs. 7.3 (pmol/mL)/(mg/dL)/(pg/mL); p = 0.014). Patients with HFpEF had impaired natriuretic response to intravenous saline and furosemide administration and lower baseline ucGMP/plasma BNP ratios indicating renal hypo-responsiveness to NPs.
Topics: Humans; Heart Failure; Male; Female; Aged; Pilot Projects; Stroke Volume; Furosemide; Sodium; Natriuretic Peptide, Brain; Kidney; Middle Aged; Natriuresis; Diuretics; Cyclic GMP; Aged, 80 and over
PubMed: 38740564
DOI: 10.14814/phy2.16033 -
Jornal Brasileiro de Nefrologia 2024
Topics: Humans; Sulfadiazine; Toxoplasmosis, Cerebral; Male; HIV Infections; HIV-1; Crystallization; Renal Insufficiency; Adult; Crystalluria
PubMed: 38739000
DOI: 10.1590/2175-8239-JBN-2023-0151en -
Chemosphere Jul 2024The effective removal of micropollutants by water treatment technologies remains a significant challenge. Herein, we develop a CoFe layered double hydroxide (CoFeLDH)...
The effective removal of micropollutants by water treatment technologies remains a significant challenge. Herein, we develop a CoFe layered double hydroxide (CoFeLDH) catalytic membrane for peroxymonosulfate (PMS) activation to achieve efficient micropollutant removal with improved mass transfer rate and reaction kinetics. This study found that the CoFeLDH membrane/PMS system achieved an impressive above 98% degradation of the probe chemical ranitidine at 0.1 mM of PMS including five more micropollutants (Sulfamethoxazole, Ciprofloxacin, Carbamazepine, Acetaminophen and Bisphenol A) at satisfactory level (above 80%). Moreover, significant improvements in water flux and antifouling properties were observed, marking the membrane as a specific advancement in the removal of membrane fouling in water purification technology. The membrane demonstrated consistent degradation efficiency for several micropollutants and across a range of pH (4-9) as well as different anionic environments, thereby showing it suitability for scale-up application. The key role of reactive species such as SO, and O - radicals in the degradation process was elucidated. This is followed by the confirmation of the occurrence of redox cycling between Co and Fe, and the presence of CoOH that promotes PMS activation. Over the ten cycles, the membrane could be operated with a flux recovery of up to 99.8% and maintained efficient performance over 24 h continuous operation. Finally, the efficiency in degrading micropollutants, coupled with reduced metal leaching, makes the CoFeLDH membrane as a promising technology for application in water treatment.
Topics: Water Purification; Water Pollutants, Chemical; Membranes, Artificial; Hydroxides; Phenols; Peroxides; Benzhydryl Compounds; Carbamazepine; Ranitidine; Acetaminophen; Sulfamethoxazole; Ciprofloxacin; Catalysis; Cobalt; Oxidation-Reduction
PubMed: 38735495
DOI: 10.1016/j.chemosphere.2024.142318 -
Aquatic Toxicology (Amsterdam,... Jun 2024In aquaculture around the world, sulfamonomethoxine (SMM), a long-acting antibiotic that harms microalgae, is widely employed in combination with trimethoprim (TMP), a...
In aquaculture around the world, sulfamonomethoxine (SMM), a long-acting antibiotic that harms microalgae, is widely employed in combination with trimethoprim (TMP), a synergist. However, their combined toxicity to microalgae under long-term exposures at environmentally relevant concentrations remains poorly understood. Therefore, we studied the effects of SMM single-exposures and co-exposures (SMM:TMP=5:1) at concentrations of 5 μg/L and 500 μg/L on Chlorella pyrenoidosa within one aquacultural drainage cycle (15 days). Photosynthetic activity and N assimilating enzyme activities were employed to evaluate microalgal nutrient assimilation. Oxidative stress and flow cytometry analysis for microalgal proliferation and death jointly revealed mechanisms of inhibition and subsequent self-adaptation. Results showed that exposures at 5 μg/L significantly inhibited microalgal nutrient assimilation and induced oxidative stress on day 7, with a recovery to levels comparable to the control by day 15. This self-adaptation and over 95 % removal of antibiotics jointly contributed to promoting microalgal growth and proliferation while reducing membrane-damaged cells. Under 500 μg/L SMM single-exposure, microalgae self-adapted to interferences on nutrient assimilation, maintaining unaffected growth and proliferation. However, over 60 % of SMM remained, leading to sustained oxidative stress and apoptosis. Remarkably, under 500 μg/L SMM-TMP co-exposure, the synergistic toxicity of SMM and TMP significantly impaired microalgal nutrient assimilation, reducing the degradation efficiency of SMM to about 20 %. Consequently, microalgal growth and proliferation were markedly inhibited, with rates of 9.15 % and 17.7 %, respectively, and a 1.36-fold increase in the proportion of cells with damaged membranes was observed. Sustained and severe oxidative stress was identified as the primary cause of these adverse effects. These findings shed light on the potential impacts of antibiotic mixtures at environmental concentrations on microalgae, facilitating responsible evaluation of the ecological risks of antibiotics in aquaculture ponds.
Topics: Trimethoprim; Water Pollutants, Chemical; Microalgae; Oxidative Stress; Sulfamonomethoxine; Chlorella; Nutrients; Photosynthesis; Anti-Bacterial Agents
PubMed: 38728928
DOI: 10.1016/j.aquatox.2024.106937 -
Chemosphere Jul 2024Sulfamethoxazole (SMX), a widely utilized antibiotic, was continually detected in the environment, causing serious risks to aquatic ecology and water security. In this... (Comparative Study)
Comparative Study
Sulfamethoxazole (SMX), a widely utilized antibiotic, was continually detected in the environment, causing serious risks to aquatic ecology and water security. In this study, carbon nanotubes (CNTs) with abundant defects were developed by argon plasma-etching technology to enhance the activation of persulfate (PS, including peroxymonosulfate (PMS) and peroxydisulfate (PDS)) for SMX degradation while reducing environmental toxicity. Obviously, the increase of I/I value from 0.980 to 1.333 indicated that Ar plasma-etching successfully introduced rich defects into CNTs. Of note, Ar-90-CNT, whose Ar plasma-etching time was 90 min with optimum catalytic performance, exhibited a significant discrepancy between PMS activation and PDS activation. Interestingly, though the Ar-90-CNT/PDS system (k = 0.0332 min) was more efficient in SMX elimination than the Ar-90-CNT/PMS system (k = 0.0190 min), Ar plasma-etching treatment had no discernible enhancement in the catalytic efficiency of MWCNT for PDS activation. Then the discrepancy on activation mechanism between PMS and PDS was methodically investigated through quenching experiments, electron spin resonance (ESR), chemical probes, electrochemical measurements and theoretical calculations, and the findings unraveled that the created vacancy defects were the ruling active sites for the production of dominated singlet oxygen (O) in the Ar-90-CNT/PMS system to degrade SMX, while the electron transfer pathway (ETP), originated from PDS activation by the inherent edge defects, was the central pathway for SMX removal in the Ar-90-CNT/PDS system. Based on the toxicity test of Microcystis aeruginosa, the Ar-90-CNT/PDS system was more effective in alleviating environmental toxicity during SMX degradation. These findings not only provide insights into the discrepancy between PMS activation and PDS activation via carbon-based materials with controlled defects regulated by the plasma-etching strategy, but also efficiently degrade sulfonamide antibiotics and reduce the toxicity of their products.
Topics: Sulfamethoxazole; Nanotubes, Carbon; Peroxides; Water Pollutants, Chemical; Sulfates; Catalysis; Anti-Bacterial Agents
PubMed: 38723685
DOI: 10.1016/j.chemosphere.2024.142287 -
Scientific Reports May 2024Cisplatin (CDDP)-induced nephrotoxicity is a common dose-limiting toxicity, and diuretics are often administered to prevent nephrotoxicity. However, the efficacy and... (Observational Study)
Observational Study Comparative Study
Cisplatin (CDDP)-induced nephrotoxicity is a common dose-limiting toxicity, and diuretics are often administered to prevent nephrotoxicity. However, the efficacy and optimal administration of diuretics in preventing CDDP-induced nephrotoxicity remain to be established. This study aimed to evaluate the efficacy of combining furosemide and mannitol to prevent CDDP-induced nephrotoxicity. This was a post-hoc analysis of pooled data from a multicenter, retrospective, observational study, including 396 patients who received one or two diuretics for CDDP-based chemotherapy, compared using propensity score matching. Multivariate logistic regression analyses were used to identify risk factors for nephrotoxicity. There was no significant difference in the incidence of nephrotoxicity between the two groups (22.2% vs. 28.3%, P = 0.416). Hypertension, CDDP dose ≥ 75 mg/m, and no magnesium supplementation were identified as risk factors for nephrotoxicity, whereas the use of diuretics was not found to be a risk factor. The combination of furosemide and mannitol showed no advantage over a single diuretic in preventing CDDP-induced nephrotoxicity. The renal function of patients receiving CDDP-based chemotherapy (≥ 75 mg/m) and that of those with hypertension should be carefully monitored. Magnesium supplementation is important for these patients.
Topics: Furosemide; Cisplatin; Humans; Mannitol; Male; Female; Diuretics; Middle Aged; Retrospective Studies; Aged; Risk Factors; Kidney Diseases; Drug Therapy, Combination; Antineoplastic Agents; Adult
PubMed: 38714773
DOI: 10.1038/s41598-024-61245-6 -
Water Research Jun 2024The effective activation of natural chalcopyrite (CuFeS) on peracetic acid (PAA) to remove organic micropollutants was studied under visible light irradiation. Results...
The effective activation of natural chalcopyrite (CuFeS) on peracetic acid (PAA) to remove organic micropollutants was studied under visible light irradiation. Results showed than an effective sulfamethoxazole (SMX) degradation (95.0 %) was achieved under visible light irradiation for 30 min at pH 7.0. Quenching experiments, electron spin resonance analysis, and LC/MS spectrum demonstrated that HO and CHC(O)OO were the main reactive species for SMX degradation, accounting for 43.3 % and 56.7 % of the contributions, respectively. Combined with X-ray photoelectron spectroscopy analysis, the photoelectrons generated on CuFeS activated by visible light enhanced the Fe/Fe and Cu/Cu cycles on the surface, thereby activating PAA to generate HO/CHC(O)OO. The removal rate of SMX decreased with the increase in wavelengths, due to the formation of low energy photons at longer wavelengths. Besides, the optimal pH for degradation of SMX by CuFeS/PAA/Vis-LED process was neutral, which was attributed to the increasing easily activated anionic form of PAA during the increase in pH and the depletion of Fe species at alkaline conditions. Cl, HCO, and HA slightly inhibited SMX degradation because of reactive species being quenched and/or shielding effect. Furthermore, the degradation efficiency of different pollutants by CuFeS/PAA/Vis-LED was also measured, and the removal efficiency was different owing to the selectivity of CHC(O)OO. Finally, the process exhibited good applicability in real waters. Overall, this study provides new insight into visible light-catalyzed activation of PAA and suggests on further exploration of the intrinsic activation mechanism of PAA.
Topics: Water Pollutants, Chemical; Copper; Peracetic Acid; Light; Hydrogen-Ion Concentration; Sulfamethoxazole
PubMed: 38713937
DOI: 10.1016/j.watres.2024.121699 -
Bioresource Technology Jun 2024The construction of aerobic denitrification (AD) systems in an antibiotic-stressed environment is a serious challenge. This study investigated strategy of cyclic stress... (Review)
Review
The construction of aerobic denitrification (AD) systems in an antibiotic-stressed environment is a serious challenge. This study investigated strategy of cyclic stress with concentration gradient (5-30 mg/L) of sulfamethoxazole (SMX) in a sequencing batch reactor (SBR), to achieve operation of AD. Total nitrogen removal efficiency of system increased from about 10 % to 95 %. Original response of abundant-rare genera to antibiotics was changed by SMX stress, particularly conditionally rare or abundant taxa (CRAT). AD process depends on synergistic effect of heterotrophic nitrifying aerobic denitrification bacteria (Paracoccus, Thauera, Hypomicrobium, etc). AmoABC, napA, and nirK were functionally co-expressed with multiple antibiotic resistance genes (ARGs) (acrR, ereAB, and mdtO), facilitating AD process. ARGs and TCA cycling synergistically enhance the antioxidant and electron transport capacities of AD process. Antibiotic efflux pump mechanism played an important role in operation of AD. The study provides strong support for regulating activated sludge to achieve in situ AD function.
Topics: Denitrification; Sulfamethoxazole; Bioreactors; Aerobiosis; Sewage; Anti-Bacterial Agents; Nitrogen; Bacteria; Stress, Physiological
PubMed: 38710419
DOI: 10.1016/j.biortech.2024.130801 -
Bioresources and Bioprocessing May 2024In this work, a beneficial approach for efficient depolymerization of lignin and controllable product distribution is provided. Lignin, an abundant aromatic biopolymer,...
In this work, a beneficial approach for efficient depolymerization of lignin and controllable product distribution is provided. Lignin, an abundant aromatic biopolymer, has the potential to produce various biofuels and chemical adsorption agents and is expected to benefit the future circular economy. Microwave-ultrasonic (MW/US) assisted efficient depolymerization of lignin affords some aromatic materials used in manufacturing the starting material to be investigated. Some nano organometallic surfactants (NOMS) based on Ni, Cu, Co, Fe, and Mn besides 2-hydroxynaphth-sulphanilamide are synthesized to enhance oil recovery (EOR). In this work, the assessment of the NOMS's efficiency was improving the heavy oil recovery via the study of the dynamic interfacial tension (IFT), contact angle, and chemical flooding scenarios. The NOMS-Ni exhibited the maximum reduction of viscosity and yield values. Dropping the viscosity to 819.9, 659.89, and 499.9 Pa s from blank crude oil viscosity of 9978.8, 8005.6, and 5008.6 Pa s respectively at temperatures of 40, 60, and 80 °C was investigated. The reduction of τ values was obtained also by OMS-Ni. The minimum IFT was recorded against the Ni derivatives (0.1 × 10 mN m). The complete wettability alteration was achieved with the NOMS-Ni surfactant (ɵ The flooding test has been steered in 3 sets using the sand-packed model as a porous media at surfactant concentrations (1, 1.5, 2 and 2.5%) at 50 °C and 499 psi as injection pressure. The best value (ORs) formed for NOMS-Ni were 62, 81, 85.2, and 89% respectively as compared with other NOMS-M at the same concentrations. The mechanism of alternating wettability was described in the text. The rheology of the used heavy crude oil was investigated under temperatures of 40, 60, and 80 °C.
PubMed: 38709379
DOI: 10.1186/s40643-024-00761-9