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1.
J Environ Sci (China) ; 148: 274-282, 2025 Feb.
Article in English | MEDLINE | ID: mdl-39095164

ABSTRACT

Developing cost-effective and high-performance catalyst systems for dry reforming of methane (DRM) is crucial for producing hydrogen (H2) sustainably. Herein, we investigate using iron (Fe) as a promoter and major alumina support in Ni-based catalysts to improve their DRM performance. The addition of iron as a promotor was found to add reducible iron species along with reducible NiO species, enhance the basicity and induce the deposition of oxidizable carbon. By incorporating 1 wt.% Fe into a 5Ni/10ZrAl catalyst, a higher CO2 interaction and formation of reducible "NiO-species having strong interaction with support" was observed, which led to an ∼80% H2 yield in 420 min of Time on Stream (TOS). Further increasing the Fe content to 2wt% led to the formation of additional reducible iron oxide species and a noticeable rise in H2 yield up to 84%. Despite the severe weight loss on Fe-promoted catalysts, high H2 yield was maintained due to the proper balance between the rate of CH4 decomposition and the rate of carbon deposit diffusion. Finally, incorporating 3 wt.% Fe into the 5Ni/10ZrAl catalyst resulted in the highest CO2 interaction, wide presence of reducible NiO-species, minimum graphitic deposit and an 87% H2 yield. Our findings suggest that iron-promoted zirconia-alumina-supported Ni catalysts can be a cheap and excellent catalytic system for H2 production via DRM.


Subject(s)
Aluminum Oxide , Hydrogen , Iron , Methane , Nickel , Zirconium , Methane/chemistry , Zirconium/chemistry , Catalysis , Iron/chemistry , Hydrogen/chemistry , Aluminum Oxide/chemistry , Nickel/chemistry
2.
ACS Sustain Chem Eng ; 12(40): 14684-14693, 2024 Oct 07.
Article in English | MEDLINE | ID: mdl-39391093

ABSTRACT

The significant surge of ionic liquids (ILs) research over the past decade has led to the formation of various novel ionic liquid compounds and their diverse applications. Enhanced geothermal systems (EGS) for geothermal power generation are an emerging IL application as a heat extraction fluid. The once widely held belief in the environmentally friendly characteristics of ionic liquids, mainly due to their insignificant vapor pressure, is now being scrutinized. It has become apparent that while ILs do not readily evaporate into the atmosphere, they are not guaranteed to remain entirely isolated from the environment. Recent attention has been directed toward toxicological studies, including ecotoxicity impacts, with the long-accepted assumption of ILs having low toxicity being invalid. This paper aims to shed light on the toxicity of hexylepyradinium bromide (HPyBr) IL and a deep eutectic solvent (DES) comprising choline chloride with magnesium chloride hexahydrate (ChCl:MgCl2·6H2O) to five test species, an algal species (Raphidocelis subcapitata), the water flea (Ceriodaphnia dubia and Daphina magna), the fathead minnow (Pimephales promelas), and the earthworm (Eisenia fetida), to measure acute and chronic toxicity. Additionally, new approach methods (NAMs) are presented using the fathead minnow embryo and the rainbow trout (Oncorhynchus mykiss) gill cell line and the RTgill-W1 assay to compare sensitivity across species. Overall, ChCl:MgCl2·6H2O displayed lower toxicity, while HPyBr demonstrated higher toxicity, highlighting the need for caution in handling it to prevent harm to aquatic ecosystems. Comparative analysis underscored the potential threat of ChCl:MgCl2·6H2O to aquatic life, highlighting the cumulative effects of the environmental components.

3.
Chemosphere ; 366: 143481, 2024 Oct 05.
Article in English | MEDLINE | ID: mdl-39369748

ABSTRACT

Efficient recovery of uranium from wastewater and seawater provides an important guarantee for the sustainable growth of nuclear energy. Herein, we skillfully use the alkali etching method to construct CeO2 hollow spheres rich in Ce-OH groups for the removal and recovery of uranium from water matrixes. It is found that the CeO2 exhibits fast adsorption kinetics (equilibrium time within 10 min) and moderate adsorption capacity (143.1 mg/g), and the removal efficiency of low concentration uranium (0.1 g/L and 1 g/L) reaches 100% within 1 min of adsorption. Moreover, the adsorption of uranium by CeO2 is almost unaffected by common anions and cations in the environment, even if the concentration of anions is 1000 times that of uranium. More importantly, the CeO2 can enrich uranium concentration in seawater by 167.9 times and the recovery rate reaches 83.9%. Mechanistic studies reveal that the adsorption of uranium by CeO2 is mainly attributed to the rich Ce-OH groups on the surface of CeO2, resulting in the rapid adsorption of U(VI) and mainly forms a single-bridge model. The findings of this study provide a green and efficient path for the removal and recovery of uranium from wastewater and seawater.

4.
Philos Trans A Math Phys Eng Sci ; 382(2283): 20240015, 2024 Oct 07.
Article in English | MEDLINE | ID: mdl-39370791

ABSTRACT

We present the design and evaluation of a simple, compact and efficient electromagnetic energy harvesting tile that can be used to harness energy from footsteps. The proposed harvester incorporates a translational-rotational origami-inspired coupling mechanism to transform the axial loads exerted by human footsteps into a localized rotation of an electromagnetic generator. The coupling mechanism employs a non-rigid tunable Kresling spring, the restorative behaviour of which is tunable to maximize energy transduction from the applied load to the generator. A computational model is developed to optimize the design parameters of the mechanism, which are then utilized to fabricate a prototype of the energy harvester. The tile is tested under loading conditions that mimic a human step, where it is demonstrated that it is capable of generating 4.18 W of electrical power per step with a surface power density of 2609 µW cm-2.This article is part of the theme issue 'Origami/Kirigami-inspired structures: from fundamentals to applications'.

5.
J Am Chem Soc ; 146(39): 26994-27005, 2024 Oct 02.
Article in English | MEDLINE | ID: mdl-39297671

ABSTRACT

Copper nanoclusters (Cu NCs) characterized by their well-defined electronic and optical properties are an ideal platform for organic photocatalysis and exploring atomic-level behaviors. However, their potential as greener, efficient catalysts for challenging reactions like decarboxylative oxygenation under mild conditions remains unexplored. Herein, we present Cu13(Nap)3(PPh3)7H10 (hereafter Cu13Nap), protected by 1-naphthalene thiolate (Nap), which performs well in decarboxylative oxidation (90% yield) under photochemical conditions. In comparison, the isostructural Cu13(DCBT)3(PPh3)7H10 (hereafter Cu13DCBT), stabilized by 2,4-dichlorobenzenethiolate (DCBT), yields only 28%, and other previously reported Cu NCs (Cu28, Cu29, Cu45, Cu57, and Cu61) yield in the range of 6-18%. The introduction of naphthalene thiolate to the surface of Cu13 NCs influences their electronic structure and charge transfer in the ligand shell, enhancing visible light absorption and catalytic performance. Density functional theory (DFT) and experimental evidence suggest that the reaction proceeds primarily through an energy transfer mechanism. The energy transfer pathway is uncommon in the context of previous reports for decarboxylative oxidation reactions. Our findings suggest that strategically manipulating ligands holds significant potential for creating composite active sites on atomically precise copper NCs, resulting in enhanced catalytic efficacy and selectivity across various challenging reactions.

6.
Luminescence ; 39(9): e4901, 2024 Sep.
Article in English | MEDLINE | ID: mdl-39315403

ABSTRACT

In this research, the impact of the different zinc (Zn) concentrations on the physical and optoelectronic properties of Bi2S3 nanorods as self-powered and photodiode applications was investigated. The performance of P-N junction photodiodes has been for decades since they are crucial in energy applications. The structure, degree of crystallinity, and shape of Zn-doped Bi2S3 nanorods of various doping percentages formed onto the indium tin oxide (ITO) substrates by the dip coating technique are investigated using X-ray powder diffraction (XRD) and SEM. With increasing illumination time, the current-voltage (I-V) graphs demonstrate a rise in photocurrent. The diode's idealist factor was estimated using the I-V technique under 30 min of light illumination.


Subject(s)
Bismuth , Nanotubes , Sulfides , Zinc , Bismuth/chemistry , Zinc/chemistry , Nanotubes/chemistry , Sulfides/chemistry , Tin Compounds/chemistry , Particle Size , X-Ray Diffraction , Light
7.
Cureus ; 16(8): e67261, 2024 Aug.
Article in English | MEDLINE | ID: mdl-39301351

ABSTRACT

AIM: This study aims to evaluate the awareness and knowledge of ionizing radiation in common radiological investigations, as well as the associated risks, among medical and applied medical sciences students at Majmaah University in Majmaah, Saudi Arabia. MATERIALS AND METHODS: This cross-sectional study involved 209 participants who completed an anonymous electronic questionnaire consisting of 21 questions. Participants were categorized based on demographic characteristics and assessed for their awareness and knowledge of radiation and its associated risks. Data analysis was conducted using the Statistical Package for the Social Sciences (SPSS) software, version 24.0 (IBM Corp., Armonk, NY, USA). Qualitative data comparisons were performed using the Chi-square test, with a p-value of <0.05 considered statistically significant. RESULTS: A total of 209 participants completed the questionnaire, with a nearly equal distribution of males (49.8%) and females (50.2%). Most of the participants were medical students (59.3%). The overall knowledge score had a mean of 2 (SD=2) and a range of 0-7. The overall awareness score had a mean of 3 (SD=2) and a range of 0-6. Male gender and knowledge had a significant association (p=0.022). Applied medical sciences students had a significantly higher awareness level than medical students (p=0.004). There was a significant association between academic level and knowledge level (p=0.025), which was highest among third-year students. CONCLUSION:  Overall medical and applied medical sciences students' knowledge and awareness of ionizing radiation dose and the health risks associated with it was reported to be low. The results highlight the need to train medical and applied medical sciences students with sufficient radiological education that enable them to adhere to safe practices in the future.

8.
RSC Med Chem ; 2024 Aug 16.
Article in English | MEDLINE | ID: mdl-39246752

ABSTRACT

Cancer patients undergoing chemotherapy are highly susceptible to infections owing to their compromised immune system, which also promotes cancer progression through inflammation. Thus, this study aimed to develop novel chemotherapeutic agents with both anticancer and antimicrobial properties. A series of diarylurea derivatives based on pyridazinone scaffolds were designed, synthesized, and characterized as surrogates for sorafenib. The synthesized compounds were tested for their antimicrobial activity and screened against 60 cancer cell lines at the National Cancer Institute (NCI). Compound 10h exhibited potent antibacterial activity against Staphylococcus aureus (MIC = 16 µg mL-1), whereas compound 8g showed significant antifungal activity against Candida albicans (MIC = 16 µg mL-1). Additionally, ten compounds were further evaluated for VEGFR-2 inhibition, with compound 17a showing the best inhibitory activity. Compounds 8f, 10l, and 17a demonstrated significant anticancer activity against melanoma, NSCLC, prostate cancer, and colon cancer, with growth inhibition percentages (GI%) ranging from 62.21% to 100.14%. Compounds 10l and 17a were selected for five-dose screening, displaying GI50 values of 1.66-100 µM. Compound 10l induced G0-G1 phase cell cycle arrest in the A549/ATCC cell line, increasing the cell population from 85.41% to 90.86%. Gene expression analysis showed that compound 10l upregulated pro-apoptotic genes p53 and Bax and downregulated the anti-apoptotic gene Bcl-2. Molecular docking studies provided insights into the binding modes of the compounds to the VEGFR-2 enzyme. In conclusion, the pyridazinone-based diarylurea derivatives developed in this study show promise as dual-function antimicrobial and anticancer agents, warranting further investigation.

9.
Environ Toxicol Pharmacol ; 110: 104542, 2024 Sep.
Article in English | MEDLINE | ID: mdl-39179192

ABSTRACT

Chlorpyrifos (CPF) is a highly toxic commonly used pesticide and can seriously harm human health. This study assessed the potential of galangin (GAL), an antioxidant flavonoid, to attenuate oxidative stress, inflammation and kidney injury caused by CPF, emphasizing the role of farnesoid-x-receptor (FXR) and Nrf2. Rats were supplemented with CPF and GAL for 28 days. CPF increased serum creatinine, urea and Kim-1, provoked several tissue alterations, and increased kidney ROS, malondialdehyde (MDA), NF-κB p65, TNF-α, iNOS, and caspase-3. GAL effectively ameliorated serum kidney injury markers, ROS, MDA, and TNF-α, suppressed NF-κB p65, iNOS, and caspase-3, and enhanced antioxidants. GAL suppressed Keap1 and upregulated FXR, Nrf2, HO-1 and NQO-1 in CPF-administered rats. GAL exhibited binding affinity with Keap1, FXR, caspase-3, iNOS, HO-1, and NF-κB. In conclusion, GAL is effective in preventing CPF nephrotoxicity by attenuating oxidative stress and inflammation. This protection is linked to upregulation of antioxidants, Nrf2/HO-1 signaling and FXR.


Subject(s)
Chlorpyrifos , Flavonoids , Kidney , NF-E2-Related Factor 2 , Oxidative Stress , Receptors, Cytoplasmic and Nuclear , Up-Regulation , Animals , Oxidative Stress/drug effects , NF-E2-Related Factor 2/metabolism , Chlorpyrifos/toxicity , Male , Flavonoids/pharmacology , Flavonoids/therapeutic use , Up-Regulation/drug effects , Kidney/drug effects , Kidney/metabolism , Kidney/pathology , Receptors, Cytoplasmic and Nuclear/metabolism , Rats , Inflammation/drug therapy , Inflammation/chemically induced , Insecticides/toxicity , Antioxidants/pharmacology , Rats, Wistar , Acute Kidney Injury/chemically induced , Acute Kidney Injury/metabolism , Acute Kidney Injury/drug therapy , Acute Kidney Injury/prevention & control
10.
World Neurosurg ; 191: 81-90, 2024 Aug 09.
Article in English | MEDLINE | ID: mdl-39127382

ABSTRACT

OBJECTIVE: Spinal fusion surgery is known to be an expensive intervention. Although innovative technologies in the field aim at improving operative efficiency and outcomes, total costs must be considered. The authors hope to elucidate any differences between robot-assisted (RA) and computed tomography navigation (CT-nav) or freehand fluoroscopy-guided (FFG) pedicle screw placement in relation to patient outcomes and cost-effectiveness in lumbar fusion surgery (LFS). METHODS: Following the Preferred Reporting Items for Systematic Reviews and Meta-Analyses guidelines, the authors performed a systematic review to identify studies comparing clinical outcomes between CT-nav or RA versus FFG in LFS patients. All included studies utilized bilateral pedicle screws. Statistical analysis was performed using R. RESULTS: Of the 1162 identified studies, 5 were included in the analysis. Direct evidence showed that RA decreased hospital length of stay when compared to FFG (mean difference [MD]: -2.67 days; 95% confidence interval [CI]: -4.25 to -1.08; P < 0.01). Indirect evidence showed that RA decreased operative time when compared to CT-nav (MD: -65.57 minutes; 95% CI: -127.7 to -3.44; P < 0.05). For estimated blood loss, direct evidence showed that RA was superior to FFG (MD: -120.62 mL; 95% CI: -206.39 to -34.86; P < 0.01). However, no significant difference was found between RA and CT-nav for estimated blood loss (MD: 14.88 mL; 95% CI: -105.54 to 135.3; P > 0.05). There were no other significant differences in Oswestry Disability Index, visual analog scale, or complication or reoperation rates between RA and FFG or CT-nav. CONCLUSIONS: This study shows that RA pedicle screw placement in LFS provides similar patient outcomes to CT-nav and FFG. Robot-assisted operations were found to give rise to cost savings via decreased length of stay when compared to both CT-nav and FFG techniques. Cost-savings of $4086-$4865/patient and $7317-$9654/patient could be achieved when utilizing RA over CT-nav and FFG, respectively. However, extra upfront and maintenance costs may impact full adoption of RA in LFS.

11.
Eur J Pharmacol ; 982: 176929, 2024 Nov 05.
Article in English | MEDLINE | ID: mdl-39181226

ABSTRACT

Multiple sclerosis (MS) is a chronic condition characterized by immune cell infiltration and cytokine overproduction that led to myelin sheath inflammatory assaults, thus causing axonal destruction. The former consequently provokes motor impairment and psychological disorders. Markedly, depression is one of the most prevalent lifelong comorbidities that negatively impacts the quality of life in MS patients. Vortioxetine (VTX), a multi-modal molecule prescribed to manage depression and anxiety disorder, additionally, it displays a promising neuroprotective properties against neurodegenerative diseases such as Alzheimer's and Parkinson's. To this end, the present study investigated the potential therapeutic efficacy of VTX against experimental autoimmune encephalomyelitis (EAE) model of MS in mice. Notably, treatment with VTX significantly ameliorated EAE-induced motor disability, as evident by enhanced performance in open field, rotarod and grip strength tests, alongside a reduction in immobility time during the forced swimming test, indicating a mitigation of the depressive-like behavior; outcomes that were corroborated with histological examinations and biochemical analyses. Mechanistically, VTX enhanced serotonin levels by inhibiting both serotonin transporter (SERT) and indoleamine 2,3-dioxygenase (IDO) enzyme, thereby promoting the activation of serotonin 1A (5-HT1A) receptor. The latter triggered the stimulation of phosphoinositide 3-kinase/protein kinase B (PI3K/Akt) cascade that entailed activation/phosphorylation of cAMP response element-binding protein (CREB). This activation increased brain derived neurotrophic factor (BDNF) and myelin basic protein (MBP) contents that mitigated demyelination in the corpus callosum. Furthermore, VTX suppressed phospho serine 536 nuclear factor kappa B (pS536 NF-κB p65) activity and reduced tumor necrosis factor-alpha (TNF-α) production. The results underscore VTX's beneficial effects on disease severity in EAE model of MS in mice by amending both inflammatory and neurodegenerative components of MS progression.


Subject(s)
Brain-Derived Neurotrophic Factor , Cyclic AMP Response Element-Binding Protein , Encephalomyelitis, Autoimmune, Experimental , Phosphatidylinositol 3-Kinases , Proto-Oncogene Proteins c-akt , Serotonin , Signal Transduction , Vortioxetine , Animals , Encephalomyelitis, Autoimmune, Experimental/drug therapy , Encephalomyelitis, Autoimmune, Experimental/pathology , Encephalomyelitis, Autoimmune, Experimental/metabolism , Brain-Derived Neurotrophic Factor/metabolism , Cyclic AMP Response Element-Binding Protein/metabolism , Proto-Oncogene Proteins c-akt/metabolism , Mice , Signal Transduction/drug effects , Serotonin/metabolism , Vortioxetine/pharmacology , Vortioxetine/therapeutic use , Phosphatidylinositol 3-Kinases/metabolism , Multiple Sclerosis/drug therapy , Multiple Sclerosis/metabolism , Female , Mice, Inbred C57BL , Disease Models, Animal , Behavior, Animal/drug effects
13.
Surg Open Sci ; 20: 178-183, 2024 Aug.
Article in English | MEDLINE | ID: mdl-39104605

ABSTRACT

Background: Surgical residency training is prominently demanding and stressful. This can affect the residents' wellbeing, work-life balance and increase the rates of burnout. We aimed to assess rates of satisfaction and burn-out among GS residents in the national training programs and provide a subsequent in-depth analysis of the potential reasons. Method: A sequential explanatory mixed-methods study was conducted using an online survey and virtual interviews. The validated abbreviated Maslach Burnout Inventory (aMBI) was used to assess burnout while satisfaction was assessed via 5-points Likert scale. Results: After excluding incomplete responses from the total 74 received, 53 were analyzed. The average participant age was 27.4 ± 2 years, with females comprising 52 % of the sample. Junior residents made up 58.5 %, and nearly half -45 %- considered quitting GS training. Moderate to high burnout rates were noted on each aMBI subscale, ranging from 41.7 % to 62.5 %. The majority of residents expressed dissatisfaction with the level of research engagement (81.1 %), supervision, and mentorship. However, operative exposure was a source of satisfaction. Dissatisfaction rates with intra-operative learning, academia, teaching, and clinical exposure were 62.3 %, 52.8 %, 50.9 %, and 35.8 %, respectively. Interviews revealed surgical case flow and a friendly work environment as major satisfaction sources. Conversely, lack of academic supervision and suboptimal hands-on training were major dissatisfaction sources. Conclusion: Dissatisfaction and burn-out is prevalent among national GS training programs. Sub-optimal educational delivery and low-quality hands-on operative exposure -rather than lack of exposure to cases- seem to be the culprit.

14.
Luminescence ; 39(8): e4840, 2024 Aug.
Article in English | MEDLINE | ID: mdl-39109476

ABSTRACT

The study presents Ag2CrO4/Fe2O3/CeO2 ternary nanocomposite, based on Fe2O3/CeO2 binary composites, which demonstrated excellent photocatalytic performance in the photodegradation of methylene blue under solar irradiation. The Ag2CrO4/Fe2O3/CeO2 nanocomposites was orthorhombic, ilmenite, and cubic-fluorite phases of Ag2CrO4, Fe2O3, and CeO2, respectively, according to the XRD examination. A strong bond between Ag2CrO4, Fe2O3, and CeO2 within the nanocomposite was demonstrated by the SEM and TEM investigations. Moreover, it was discovered that the coupling of Ag2CrO4 and Fe2O3 caused a red shift and moved CeO2 absorption edge from the UV to the visible spectrum. The reason behind this is that the band gap of CeO2 reduced 2.85 to 2.69 eV and the absorbance band intensity increased in visible region. Utilizing visible light, Ag2CrO4/Fe2O3/CeO2 ternary nanocomposites exhibit enhanced photocatalytic properties (98.90%) for the degradation of methylene blue (MB) within 100 min. The long-term reliability and recyclability of the photocatalyst were explored through 3 successive cycles. An active radical quenching test was conducted to elucidate the involvement of O2 - and OH which are the primary reactive species in the photocatalytic breakdown of MB. Ag2CrO4/Fe2O3/CeO2 ternary nanocomposites displayed notable improvements in photodegradation activity, making them well suited for the effective removal of hazardous dyes present in textile effluents.


Subject(s)
Cerium , Ferric Compounds , Methylene Blue , Nanocomposites , Photolysis , Nanocomposites/chemistry , Cerium/chemistry , Catalysis , Methylene Blue/chemistry , Ferric Compounds/chemistry , Photochemical Processes , Silver Compounds/chemistry , Silver/chemistry , Particle Size
15.
Luminescence ; 39(8): e4849, 2024 Aug.
Article in English | MEDLINE | ID: mdl-39099225

ABSTRACT

Pesticides in environmental samples pose significant risks to ecosystems and human health since they require precise and efficient detection methods. Imidacloprid (IMI), a widely used neonicotinoid insecticide, exemplifies these hazards due to its potential toxicity. This study addresses the urgent need for improved monitoring of such contaminants by introducing a novel fluorometric method for detecting IMI using nitrogen-doped graphite carbon dots (N-GCDs). The sensor operates by quenching fluorescence through the interaction of Cu2+ ions with N-GCDs. Subsequently, IMI binds to the imidazole group, chelates with Cu2+, and restores the fluorescence of N-GCDs. This alternating fluorescence behavior allows for the accurate identification of both Cu2+ and IMI. The sensor exhibits linear detection ranges of 20-100 nM for Cu2+ and 10-140 µg/L for IMI, with detection limits of 18 nM and 1.2 µg/L, respectively. The high sensitivity of this sensor enables the detection of real-world samples, which underscores its potential for practical use in environmental monitoring and agricultural safety.


Subject(s)
Copper , Environmental Monitoring , Fluorometry , Graphite , Neonicotinoids , Nitro Compounds , Nitrogen , Quantum Dots , Neonicotinoids/analysis , Neonicotinoids/chemistry , Nitro Compounds/chemistry , Nitro Compounds/analysis , Copper/chemistry , Copper/analysis , Nitrogen/chemistry , Graphite/chemistry , Quantum Dots/chemistry , Insecticides/analysis , Insecticides/chemistry , Imidazoles/chemistry
16.
J Family Community Med ; 31(3): 214-221, 2024.
Article in English | MEDLINE | ID: mdl-39176014

ABSTRACT

BACKGROUND: Composite Autonomic Symptom Score-31 (COMPASS-31) is an easy-to-use screening tool for the evaluation of autonomic dysfunction in various diseases affecting neural function but has rarely been used in the assessment of long coronavirus disease 2019 (COVID-19). This study aimed to evaluate the diagnostic accuracy of the COMPASS-31 score in detecting dysfunction of the autonomic nervous system in patients 3 months after COVID-19 infection. MATERIALS AND METHODS: Fifty-nine subjects were recruited and grouped into 2: (a) controls (n = 31) who had never had positive polymerase chain reaction results for COVID-19 before and (b) the post-COVID-19 patients (n = 28) who had confirmed COVID-19 infection 3-6 months before recruitment. COMPASS-31 questionnaire was utilized to evaluate subjective symptoms or evidence of autonomic dysfunction. Autonomic dysfunction was assessed objectively by cardiovascular autonomic reflex tests (CARTs) and heart rate variability (HRV). For comparison of quantitative variables between two groups, t-test or Mann-Whitney U test, as appropriate, were used. Sensitivity, specificity, negative predictive value (NPV), positive predictive value (PPV), negative likelihood ratio (LR), and positive LR were used as measures of diagnostic accuracy. Receiver operating characteristic (ROC) curve analysis determined the overall accuracy of COMPASS-31. RESULTS: The median COMPASS score was found to be significantly higher in post-COVID-19 participants than controls (15.5 vs. 10, P = 0.021). The median total CART score was also significantly higher in post-COVID-19 participants (0 vs. 1, P < 0.001). Out of 6 domains of the COMPASS score, the median value for orthostatic dysfunction was found to be significantly higher in post-COVID-19 participants than controls (12 vs. 0, P = 0.008). There was significantly fair accuracy of the COMPASS score with an area under the receiver operating curve 0.68 (0.54-0.82) following the total CART score ≥2 as the gold standard in the diagnosis of autonomic dysfunction (P = 0.021). The best cutoff point of the total COMPASS score was 12.5, where the optimal values of sensitivity, specificity, and positive and negative predictive values were achieved. Nonsignificant and weak correlations between CARTs, HRV parameters, and COMPASS score were found. CONCLUSION: COMPASS-31 could be used as a user-friendly screening tool to detect autonomic dysfunction in post-COVID-19 cases with acceptable sensitivity and specificity.

17.
Trop Med Infect Dis ; 9(8)2024 Aug 09.
Article in English | MEDLINE | ID: mdl-39195614

ABSTRACT

Drug-resistant tuberculosis (DR-TB) poses a significant public health challenge, particularly in resource-limited settings. The prevalence and management of DR-TB in African countries require comprehensive strategies to improve patient outcomes and control the spread of the disease. Aggregated routine data (from 2018 to 2022) on multidrug-resistant TB (MDR-TB) were collected from the National TB Programs (NTPs) from all six countries. The diagnostic capacity for MDR-TB was globally insufficient. The system for collecting and transporting samples was sometimes inoperative. A total of 2353 cases of MDR-TB were reported, with 86.4% receiving treatment. The gap between the expected number of MDR-TB cases and the number reported per country varied from 51.5% to 88.0%, depending on the year. Fifty-two extensively drug-resistant (XDR) TB cases received treatment regimens over five years, with variations across countries. All patients received free follow-up examinations, nutritional and financial support for travel expenses to the outpatient care and treatment centers. The MDR-TB treatment success rates for all regimens between 2018 and 2021 ranged from 44.4 to 90.9%, varying by country and year. The information system relied on primary tools, reporting tools, and digital solutions. Progress has been made in MDR-TB management; however, challenges persist, necessitating resources to enhance access to rapid molecular screening tests.

18.
Eur J Pharmacol ; 980: 176869, 2024 Oct 05.
Article in English | MEDLINE | ID: mdl-39117265

ABSTRACT

Depressive pseudodementia (DPD) is a debilitating cognitive dysfunction that accompanies major and/or frequent depressive attacks. DPD has gained significant research attention owing to its negative effects on the patients' quality of life and productivity. This study tested the procognitive potential of Flibanserin (FBN), the serotonin (5HT) receptor modulator, against propranolol (PRP), as ß/5HT1A receptors blocker. Serving this purpose, female Wistar Albino rats were subjected to chronic unpredictable stress (CUS) and subsequently treated with FBN only (3 mg/kg/day, p.o), PRP only (10 mg/kg/day, p.o), or PRP followed by FBN, using the same doses. FBN ameliorated the behavioral/cognitive alterations and calmed the hypothalamic-pituitary-adrenal (HPA) axis storm by reducing the levels of stress-related hormones, viz, corticotropin-releasing hormone (CRH), adrenocorticotropic hormone (ACTH), corticosterone (CORT) parallel to epinephrine (EPI) hyperstimulation. The maladaptive inflammatory response, comprising of interleukin (IL)-1ß/6, and tumor necrosis factor (TNF)-α, was consequently blunted. This was contemporaneous to the partial restoration of the protein kinase-B (AKT)/glycogen synthase kinase (GSK)3ß/signal transducer and activator of transcription (STAT)-3 survival trajectory and the reinstatement of the levels of brain derived neurotrophic factor (BDNF). Microscopically, FBN repaired the hippocampal architecture and lessened CD68/GFAP immunoreactivity. Pre-administration of PRP partially abolished FBN effect along the estimated parameters, except for 5HT2A receptor expression and epinephrine level, to prove 5HT1A receptor as a fulcrum initiator of the investigated pathway, while its sole administration worsened the underlying condition. Ultimately, these findings highlight the immense procognitive potential of FBN, offering a new paradigm for halting DPD advancement via synchronizing adrenergic/serotonergic circuitry.


Subject(s)
Benzimidazoles , Brain-Derived Neurotrophic Factor , Hypothalamo-Hypophyseal System , Pituitary-Adrenal System , Proto-Oncogene Proteins c-akt , Rats, Wistar , Animals , Female , Rats , Behavior, Animal/drug effects , Brain-Derived Neurotrophic Factor/metabolism , Depression/drug therapy , Depression/metabolism , Disease Models, Animal , Hypothalamo-Hypophyseal System/drug effects , Hypothalamo-Hypophyseal System/metabolism , Inflammation/drug therapy , Inflammation/pathology , Inflammation/metabolism , Pituitary-Adrenal System/drug effects , Pituitary-Adrenal System/metabolism , Proto-Oncogene Proteins c-akt/metabolism , Serotonin/metabolism , Signal Transduction/drug effects , Stress, Psychological/drug therapy , Stress, Psychological/complications , Benzimidazoles/pharmacology , Benzimidazoles/therapeutic use
19.
Cureus ; 16(7): e64804, 2024 Jul.
Article in English | MEDLINE | ID: mdl-39156276

ABSTRACT

In neonates, pulmonary diseases such as bronchopulmonary dysplasia and other chronic lung diseases (CLDs) pose significant challenges due to their complexity and high degree of morbidity and mortality. This review discusses the etiology, pathophysiology, clinical presentation, and diagnostic criteria for these conditions, as well as current management strategies. The review also highlights recent advancements in understanding the pathophysiology of these diseases and evolving strategies for their management, including gene therapy and stem cell treatments. We emphasize how supportive care is useful in managing these diseases and underscore the importance of a multidisciplinary approach. Notably, we discuss the emerging role of personalized medicine, enabled by advances in genomics and precision therapeutics, in tailoring therapy according to an individual's genetic, biochemical, and lifestyle factors. We conclude with a discussion on future directions in research and treatment, emphasizing the importance of furthering our understanding of these conditions, improving diagnostic criteria, and exploring targeted treatment modalities. The review underscores the need for multicentric and longitudinal studies to improve preventative strategies and better understand long-term outcomes. Ultimately, a comprehensive, innovative, and patient-centered approach can enhance the quality of care and outcomes for neonates with CLDs.

20.
Malays J Pathol ; 46(2): 325-329, 2024 Aug.
Article in English | MEDLINE | ID: mdl-39207011

ABSTRACT

Talaromyces marneffei is a thermally dimorphic fungus which causes opportunistic infections in immunocompromised individuals. The diagnosis of T. marneffei infection rests on the microscopic demonstration of the fungus in the tissues and/or isolation of the fungus from clinical specimens. In this report, we discuss a case involving a 23-year-old man who presented with a history of intermittent fever, cough and constitutional symptoms. Clinically, the patient exhibited pallor, jaundice, generalized seborrhoeic dermatitis, hepatomegaly, and small palpable cervical lymph nodes. A computed tomography (CT) scan of the abdomen showed homogenous hypodense lesions in both liver lobes. HIV screening result was reactive. Microscopic examination of the bone marrow aspirate smear and trephine biopsy identified fungal bodies, and culture of the marrow aspirate confirmed the presence of T. marneffei. Notably, the liver biopsy revealed Burkitt lymphoma alongside fungal bodies. He was treated with intravenous Amphotericin B but ultimately succumbed to the illness due to severe metabolic acidosis and multiorgan failure. This case underscores the importance of presumptive diagnosis through morphological or histological examination of bone marrow samples, as microbiologic culture methods can be time-consuming. Timely diagnosis and aggressive treatment are critical in managing patients with T. marneffei infection.


Subject(s)
Bone Marrow , Burkitt Lymphoma , Mycoses , Talaromyces , Humans , Male , Burkitt Lymphoma/pathology , Burkitt Lymphoma/diagnosis , Mycoses/diagnosis , Mycoses/pathology , Mycoses/microbiology , Young Adult , Bone Marrow/pathology , Bone Marrow/microbiology , Talaromyces/isolation & purification , Fatal Outcome
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