Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 1.666
Filtrar
1.
NPJ Clim Atmos Sci ; 7(1): 215, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39281887

RESUMEN

During summer, ammonia emissions in Southeast Asia influence air pollution and cloud formation. Convective transport by the South Asian monsoon carries these pollutant air masses into the upper troposphere and lower stratosphere (UTLS), where they accumulate under anticyclonic flow conditions. This air mass accumulation is thought to contribute to particle formation and the development of the Asian Tropopause Aerosol Layer (ATAL). Despite the known influence of ammonia and particulate ammonium on air pollution, a comprehensive understanding of the ATAL is lacking. In this modelling study, the influence of ammonia on particle formation is assessed with emphasis on the ATAL. We use the EMAC chemistry-climate model, incorporating new particle formation parameterisations derived from experiments at the CERN CLOUD chamber. Our diurnal cycle analysis confirms that new particle formation mainly occurs during daylight, with a 10-fold enhancement in rate. This increase is prominent in the South Asian monsoon UTLS, where deep convection introduces high ammonia levels from the boundary layer, compared to a baseline scenario without ammonia. Our model simulations reveal that this ammonia-driven particle formation and growth contributes to an increase of up to 80% in cloud condensation nuclei (CCN) concentrations at cloud-forming heights in the South Asian monsoon region. We find that ammonia profoundly influences the aerosol mass and composition in the ATAL through particle growth, as indicated by an order of magnitude increase in nitrate levels linked to ammonia emissions. However, the effect of ammonia-driven new particle formation on aerosol mass in the ATAL is relatively small. Ammonia emissions enhance the regional aerosol optical depth (AOD) for shortwave solar radiation by up to 70%. We conclude that ammonia has a pronounced effect on the ATAL development, composition, the regional AOD, and CCN concentrations.

2.
Artículo en Inglés | MEDLINE | ID: mdl-39282909

RESUMEN

Posteromedial tibial plateau fracture is one of the most challenging traumatic fractures. We aimed to compare and explain the biomechanical advantages and disadvantages of different internal fixation methods for the treatment of the posteromedial split fracture fragment in tibial plateau fractures. Finite element models of the tibial plateau fracture were constructed. Three different internal fixations were developed to treat the posteromedial split fracture fragment in tibial plateau fractures finite element models: (a) the novel anatomic locking plate fixation model, (b) the common anatomic locking plate fixation model, and (c) the reconstruction plate fixation model. We applied the same loading conditions to each model: 320 N axial compression. Under the same condition, the von Mises stress (VMS) and displacement distribution of the three internal fixations and tibia plateau were studied. The stress values of the novel anatomic locking plate are lower than the common anatomic locking plate and the reconstruction plate. Additionally, the novel anatomic locking plate fixation system exhibits smaller maximum displacement. In conclusion, our study indicated that the novel anatomic locking plate resulted in a lower stress distribution in the plate and screws, and better stability than the common anatomic locking plate and the reconstruction plate for the posteromedial split fracture fragment in tibial plateau fractures fixation under the same loading conditions. Thus, for the posteromedial split fracture fragment in tibial plateau fractures, the use of the novel anatomic locking plate internal fixation is recommended.

3.
Environ Sci Technol ; 58(37): 16347-16356, 2024 Sep 17.
Artículo en Inglés | MEDLINE | ID: mdl-39234944

RESUMEN

As organophosphorus flame retardants (OPFRs) are constantly detected in human samples, the neurotoxicity of OPFRs is of concern. In this study, pregnant ICR mice were exposed to 2-ethylhexyl diphenyl phosphate (EHDPP) in drinking water from gestation to lactation to investigate its effects on autism spectrum disorder-like (ASD-like) behaviors in offspring. Serum EHDPP concentrations in dams in the 0.4, 2, and 10 mg/kg groups were 0.282 ± 0.051, 0.713 ± 0.115, and 0.974 ± 0.048 ng/mL, respectively, within the concentration range in humans. At the highest dose, EHDPP exposure induced ASD-like behaviors in both female and male offspring. Significant reductions in mature dendritic spines and structural damage to the postsynaptic density zone were noted in all but the lowest exposure groups, indicating postsynaptic membrane impairment. Mechanistically, EHDPP significantly downregulated disc large MAGUK scaffold protein 4 expression by inhibiting protein kinase B and type 1 insulin-like growth factor receptor phosphorylation. In the heterologous synapse formation assay in vivo, EHDPP significantly reduced the levels of postsynaptic density protein 95 expression in neurons at 1 µM. Overall, the study utilized in vitro and in vivo experiments to confirm that EHDPP damaged postsynaptic membrane formation and might increase the incidence of ASD in offspring.


Asunto(s)
Trastorno del Espectro Autista , Ratones Endogámicos ICR , Animales , Trastorno del Espectro Autista/inducido químicamente , Ratones , Femenino , Embarazo , Masculino , Retardadores de Llama/toxicidad , Conducta Animal/efectos de los fármacos , Efectos Tardíos de la Exposición Prenatal
4.
Mar Pollut Bull ; 208: 116933, 2024 Sep 10.
Artículo en Inglés | MEDLINE | ID: mdl-39260142

RESUMEN

Coastal areas are regions of active interaction between the sea and land and are highly sensitive to changes in heavy metal contamination caused by natural and anthropogenic activities. The contents of heavy metals in 80 surface sediments in the Qizhou Island sea area in the northeast of Hainan Island were determined to assess the contamination status, spatial distribution, sources, and ecological risks. The results indicate that the main factors influencing the distribution patterns and contents of heavy metals are hydrodynamic conditions and sources of materials. The accumulation of Cd and Pb in the sediments is attributed to the combined effects of natural sources and anthropogenic input. In addition to widespread anthropogenic influence, the enrichment of Cd in the southeastern outer shelf area of the study region may be controlled by biogenic carbonate rocks or enhanced input of near-source materials during the late Pleistocene low sea level period.

5.
Artículo en Inglés | MEDLINE | ID: mdl-39192553

RESUMEN

BACKGROUND AND AIMS: Non-selective beta-blockers (NSBB) are a well-established treatment in patients with clinically significant portal hypertension. However, their potential role after insertion of a transjugular intrahepatic portosystemic shunt (TIPS) still needs to be determined. Of note, recent studies suggested that favourable anti-inflammatory effects of NSBB might be independent from pressure reduction. This study aimed to evaluate whether NSBB-treatment is associated with amelioration of systemic inflammation (SI), hepatic decompensation and survival after TIPS-insertion. METHODS: In a retrospective study comprising 305 consecutive patients, we investigated the impact of NSBB-intake at TIPS-placement on periinterventional cirrhosis-associated complications and continued NSBB-treatment after discharge on complications including hepatic decompensation and mortality during 1-year follow-up, employing multivariable competing-risk-analyses. In a prospective cohort including 45 patients, we performed a comprehensive analysis of SI analysing 48 soluble inflammatory markers (SIMs) at baseline plus 3 and 6 months after TIPS-insertion. RESULTS: Overall, 175 (57.4%) patients received NSBB-therapy prior to TIPS-insertion; upon discharge, this decreased to 131 (22.9%), with 36 (27.5%) discontinuing NSBB within 1-year follow-up. Neither NSBB-therapy at TIPS-insertion nor treatment-continuation after discharge were associated with lower risks for hepatic decompensation, individual cirrhosis-associated complications or mortality neither in the periinterventional period nor during follow-up. Similarly, in the prospective cohort NSBB-intake was not linked to lower levels or a more prominent change of WBC, CRP or any other SIM at any of the investigated time points. CONCLUSION: NSBB-therapy at the time of TIPS-insertion and its (dis-)continuation afterwards seems to have no significant impact on SI, development of hepatic decompensation and survival.

6.
Front Public Health ; 12: 1441465, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39114523

RESUMEN

Introduction: Increased uncertainty is a major feature of the current society that poses significant challenges to university students' mental health and academics. However, current research has not paid sufficient attention to this issue, and no study has explored the underlying mechanisms between intolerance of uncertainty and academic burnout among university students. Methods: This study examined the association between uncertainty intolerance and academic burnout among university students and the role of self-regulatory fatigue and self-compassion in light of the theory of limited resources. Convenience sampling was used to survey 1,022 Chinese university students. Results: The findings demonstrated that intolerance of uncertainty significantly influenced university students' academic burnout with self-regulatory fatigue serving as a key mediator. Additionally, self-compassion can effectively moderate the effects of intolerance of uncertainty on self-regulatory fatigue and academic burnout. Discussion: These results indicated that the depletion of cognitive resources brought about by uncertainty in the current highly uncertain social environment may be one of the key pathways to academic burnout among university students. Furthermore, current research provides insights into how to mitigate the negative effects of uncertainty on university students.


Asunto(s)
Estudiantes , Humanos , Universidades , Femenino , Estudiantes/psicología , Masculino , Incertidumbre , Adulto Joven , Encuestas y Cuestionarios , China/epidemiología , Empatía , Adulto , Fatiga/psicología , Agotamiento Profesional/psicología , Agotamiento Psicológico/psicología
7.
Bioorg Chem ; 152: 107744, 2024 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-39213799

RESUMEN

Substrate access tunnel engineering is a useful strategy for enzyme modification. In this study, we improved the catalytic performance of Fe-type Nitrile hydratase (Fe-type NHase) from Pseudomonas fluorescens ZJUT001 (PfNHase) by mutating residue Q86 at the entrance of the substrate access tunnel. The catalytic activity of the mutant PfNHase-αQ86W towards benzonitrile, 2-cyanopyridine, 3-cyanopyridine, and 4-hydroxybenzonitrile was enhanced by 9.35-, 3.30-, 6.55-, and 2.71-fold, respectively, compared to that of the wild-type PfNHase (PfNHase-WT). In addition, the mutant PfNHase-αQ86W showed a catalytic efficiency (kcat/Km) towards benzonitrile 17.32-fold higher than the PfNHase-WT. Interestingly, the substrate preference of PfNHase-αQ86W shifted from aliphatic nitriles to aromatic nitrile substrates. Our analysis delved into the structural changes that led to this altered substrate preference, highlighting an expanded entrance tunnel region, theenlarged substrate-binding pocket, and the increased hydrophobic interactions between the substrate and enzyme. Molecular dynamic simulations and dynamic cross-correlation Matrix (DCCM) further supported these findings, providing a comprehensive explanation for the enhanced catalytic activity towards aromatic nitrile substrates.


Asunto(s)
Hidroliasas , Nitrilos , Pseudomonas fluorescens , Pseudomonas fluorescens/enzimología , Hidroliasas/metabolismo , Hidroliasas/química , Especificidad por Sustrato , Nitrilos/química , Nitrilos/metabolismo , Estructura Molecular , Biocatálisis , Ingeniería de Proteínas
8.
Transl Oncol ; 48: 102077, 2024 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-39106550

RESUMEN

Cytochrome P450 F3 (CYP4F3) is recognized as a disease-associated immune response initiator that is involved in the synthesis of cholesterol, steroids, and lipids. This study identified the upregulation of CYP4F3 expression in colorectal cancer (CRC) and its association with poor patient prognosis through a comparative analysis between CRC tumor tissues with normal tissues from public databases. The overexpression of CYP4F3 in CT26.wt and SW620, promoted cell proliferation and migration, a reduction of cellular oxidative stress, an up-regulation of the oxidative stress-related pathway NRF2, and an inhibition of cellular ferroptosis. Additionally, inhibition of NRF2 activity stimulated cellular ferroptosis when CYP4F3 was overexpressed. Ferroptosis, characterized by iron-dependent lipid peroxidation, is a non-apoptotic way of cell death with a critical role in cancer development. When given a ferroptosis agonist to CYP4F3-overexpression CRC cells, NRF2 was activated, and cell proliferation and migration were reduced. Furthermore, the mice subcutaneously injected with CYP4F3-overexpression CT26.wt cells formed significantly larger tumors compared to the CYP4F3-vector CT26.wt cell group. This study systematically identified an important role of CYP4F3 in CRC development as a regulator of CRC cells to escape ferroptosis via NRF2, highlighting the significance of CYP4F3 as a potential therapeutic target for CRC.

9.
Sci Rep ; 14(1): 19079, 2024 08 17.
Artículo en Inglés | MEDLINE | ID: mdl-39154028

RESUMEN

Not all patients with glioblastoma multiforme (GBM) eligible for systemic chemotherapy after upfront surgery and radiotherapy finally receive it. The information on patients with GBM was retrieved from the surveillance, epidemiology, and end results database. Patients who underwent upfront surgery or biopsy and external beam radiotherapy between 2010 and 2019 were eligible for systemic chemotherapy. The available patient and tumor characteristics were assessed using multivariable logistic regression and chi-squared test. Out of the 16,682 patients eligible, 92.1% underwent systemic chemotherapy. The characteristics linked to the lowest systemic chemotherapy utilization included tumors of the brain stem/cerebellum (P = 0.01), former years of diagnosis (P = 0.001), ≥ 80 years of age (P < 0.001), Hispanic, Non-Hispanic Asian, Pacific Islander, or Black race (P < 0.001), non-partnered status (P < 0.001), and low median household income (P = 0.006). Primary tumor site, year of diagnosis, age, race, partnered status, and median household income correlated with the omission of systemic chemotherapy in GBM in adult patients.


Asunto(s)
Neoplasias Encefálicas , Glioblastoma , Humanos , Glioblastoma/terapia , Glioblastoma/cirugía , Masculino , Femenino , Persona de Mediana Edad , Anciano , Adulto , Neoplasias Encefálicas/terapia , Neoplasias Encefálicas/epidemiología , Factores Socioeconómicos , Anciano de 80 o más Años , Disparidades en Atención de Salud , Programa de VERF
10.
Research (Wash D C) ; 7: 0434, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39130495

RESUMEN

Metal-organic frameworks (MOFs) have been widely considered as ideal platforms for the preparation of biomimetic catalysts, but it remains challenging to fabricate MOF-based enzyme-like catalysts with optimal activity. Here, we leverage the inherent flexibility of MOFs and propose a novel trans-functionalization strategy to construct a carbonic anhydrase (CA) mimic by the structural transformation from ZIF-L to ZIF-8. Theoretical and experimental results reveal that during the structural transformation, the hydroxyl group will preferentially coordinate with the interlayer Zn clusters to form the CA-like active center Zn-N3-OH. Therefore, more accessible active centers are generated on the as-prepared ZIF-8-OH, resulting in substantially enhanced catalytic activity in the hydrolysis of para-nitrophenyl acetate.

11.
Heliyon ; 10(12): e32311, 2024 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-39183849

RESUMEN

Background: Traumatic injuries, surgery, and chronic diseases lead to soft tissue wounds. Stimulating normal wound healing (WH) is important for tissue repair and restoration of homeostasis. Lack of angiogenesis impedes wound healing and is noted in chronic wounds. The goal of this investigation was to thoroughly assess the present state and patterns of investigations on angiogenesis in WH by the use of bibliometric analysis. Methods: Studies examining angiogenesis and WH were sourced from the database of the Web of Science Core Collection. Only studies that fulfilled the inclusion criteria were chosen for the purpose of investigation. To analyze the publications included in this research, bibliometric and visual analysis techniques were applied utilizing tools like VOSviewer and CiteSpace. Results: For the analysis, 11,558 papers were considered. The number of publications increased annually from 2013 to 2023. China, the USA, and South Korea were the top nations in this subject, accounting for 41.1 %, 19.4 %, and 5.8 % of published articles, respectively. The author and institution with the greatest number of publications were found to be Chang J and Shanghai Jiao Tong University. PLOS One had the greatest publication count among journals, whereas Biomaterials had the greatest number of citations and was often mentioned in co-citations. Angiogenesis-related biomedical engineering and tissue engineering were the topics that received the most research attention. Recent studies have focused on vascular endothelial growth factor and carboxymethyl chitosan as emerging areas of interest. Conclusion: In this investigation, we compiled the features of publications and determined the most impactful nations, organizations, writers, periodicals, popular subjects, and patterns concerning the process of angiogenesis in the context of WH.

12.
Sci Adv ; 10(35): eadn9435, 2024 Aug 30.
Artículo en Inglés | MEDLINE | ID: mdl-39213359

RESUMEN

The fundamental differences in phospholipids between bacterial and mammalian cell membranes present remarkable opportunities for antimicrobial design. However, it is challenging to distinguish bacterial anionic phospholipid phosphatidylglycerol (PG) from mammalian anionic phosphatidylserine (PS) with the same net charge. Here, we report a class of radially amphiphilic α helix antimicrobial peptides (RAPs) that can selectively discriminate PG from PS, relying on the helix structure. The representative RAP, L10-MMBen, can direct the rearrangement of PG vesicles into a lamellar structure with its helix axis parallel to the PG membrane surface. The helical structure imparts both the thermodynamic and kinetic advantages of L10-MMBen/PG assembly, and the hiding of hydrophobic regions in RAPs is crucial for PG recognition. L10-MMBen exhibits high selectivity against bacteria depending on PG recognition, showing low in vivo toxicity and significant treatment efficacy in mice infection models. Our study introduces a helicity-direct bacterial phospholipid recognition paradigm for designing highly selective antimicrobial peptides.


Asunto(s)
Péptidos Antimicrobianos , Fosfolípidos , Animales , Péptidos Antimicrobianos/química , Péptidos Antimicrobianos/farmacología , Ratones , Fosfolípidos/química , Fosfolípidos/metabolismo , Fosfatidilgliceroles/química , Bacterias/efectos de los fármacos , Pruebas de Sensibilidad Microbiana , Interacciones Hidrofóbicas e Hidrofílicas , Péptidos Catiónicos Antimicrobianos/química , Péptidos Catiónicos Antimicrobianos/farmacología , Antibacterianos/farmacología , Antibacterianos/química
13.
Micromachines (Basel) ; 15(8)2024 Jul 25.
Artículo en Inglés | MEDLINE | ID: mdl-39203603

RESUMEN

The light homogenizing element is a crucial component of the illumination system of the lithography machine. Its primary purpose is to realize the uniform distribution of energy. However, it suffers from a common issue, which is angular spectrum discreteness, which significantly impacts light uniformity. To address this, we design and fabricate random micro-cylindrical lens arrays to obtain a small-angle Gaussian optical field, which can compensate for the angular spectrum discreteness. By adjusting the pitches and curvature radii of the micro-cylindrical lenses separately, we are able to manipulate the divergence angle of the emitted sub-beams, enabling precise angular spectrum modulation. By using mask-moving technology, the angular spectrum modulator is fabricated to generate a Gaussian illumination field. The surface profile is measured and determined with a structural roughness below 10 nm. Furthermore, optical test experiments on the modulator have been conducted, achieving an angle error of less than 0.02° and a balance better than 0.5%.

14.
Behav Sci (Basel) ; 14(8)2024 Aug 16.
Artículo en Inglés | MEDLINE | ID: mdl-39199117

RESUMEN

The constant challenge in social interactions involves making informed decisions in the face of competitive and cooperative dilemmas. The decision-making process can be influenced by various factors present in the social context. According to the behavior-pattern-categorization framework of information acquisition, potential biases may develop at all stages of decision-making as information about social context is progressively entered and integrated. In this study, employing the Chicken Game, we investigated the influence of varying information levels within the behavior-pattern-categorization framework (i.e., competitiveness of behavior choice, uncertainty of behavior pattern, and sociality of category) on decision-making in the dilemma of competition and cooperation. Combined with reinforcement learning models, our findings from three experiments showed that participants exhibited basic complementary behavior, becoming less competitive against highly competitive opponents and vice versa. Notably, individuals exhibited varying adaptation rates to different levels of opponent competitiveness and fluctuations. Specifically, participants adapted slower to highly competitive opponents and faster to cooperative opponents. This asymmetric adaptation in social learning is related to the rate at which various levels of information are updated. The current study disentangles the different levels of information acquisition and highlights the asymmetric processing that can occur during the updating of information within each level.

15.
Biomed Environ Sci ; 37(7): 687-697, 2024 Jul 20.
Artículo en Inglés | MEDLINE | ID: mdl-39198234

RESUMEN

Objective: The occurrence of chickenpox in rapidly developing areas poses substantial seasonal risk to children. However, certain factors influencing local chickenpox outbreaks have not been studied. Here, we examined the relationship between spatial clustering, heterogeneity of chickenpox outbreaks, and socioeconomic factors in Southern China. Methods: We assessed chickenpox outbreak data from Southern China between 2006 and 2021, comprising both relatively fast-growing parts and slower sub-regions, and provides a representative sample of many developing regions. We analyzed the spatial clustering attributes associated with chickenpox outbreaks using Moran's I and local indicators of spatial association and quantified their socioeconomic determinants using Geodetector q statistics. Results: There were significant spatial heterogeneity in the risk of chickenpox outbreaks, with strong correlations between chickenpox risk and various factors, particularly demographics and living environment. Furthermore, interactive effects among specific are factors, such as population density and per capita residential building area, percentage of households with toilets, percentage of rental housing, exhibited q statistics of 0.28, 0.25, and 0.24, respectively. Conclusion: This study provides valuable insights into the spatial dynamics of chickenpox outbreaks in rapidly developing regions, revealing the socioeconomic factors affecting disease transmission. These implications extend the formulation of effective public health strategies and interventions to prevent and control chickenpox outbreaks in similar global contexts.


Asunto(s)
Varicela , Brotes de Enfermedades , Salud Pública , Varicela/epidemiología , Humanos , China/epidemiología , Factores Socioeconómicos
16.
Biochim Biophys Acta Mol Cell Res ; 1871(8): 119825, 2024 Aug 19.
Artículo en Inglés | MEDLINE | ID: mdl-39168410

RESUMEN

Metabolic responses to cellular stress are pivotal in cell ferroptosis, with mitophagy serving as a crucial mechanism in both metabolic processes and ferroptosis. This study aims to elucidate the effects of high glucose on cardiomyocytes (CMs) and cardiac fibroblasts (CFs) regarding ferroptosis and to uncover the underlying mechanisms involved. We examined alterations in glycolysis, mitochondrial oxidative phosphorylation (OXPHOS), and mitophagy, which are essential for metabolic adaptations and ferroptosis. High glucose exposure induced ferroptosis specifically in CMs, while CFs exhibited resistance to ferroptosis, increased glycolytic activity, and no change in OXPHOS. Moreover, high glucose treatment enhanced mitophagy and upregulated mitochondrial ferritin (FTMT). Notably, the combination of FTMT and the autophagy-related protein nuclear receptor coactivator 4 (NCOA4) increased under high glucose conditions. Silencing FTMT significantly impeded mitophagy and eliminated ferroptosis resistance in CFs cultured under high glucose conditions. The transcription factor forkhead box A1 (FOXA1) was upregulated in CFs upon high glucose exposure, playing a crucial role in the increased expression of FTMT. Within the 5'-flanking sequence of the FTMT mRNA, approximately -500 nt from the transcription initiation site, three putative FOXA1 binding sites were identified. High glucose augmented the binding affinity between FOXA1 and these sequences, thereby promoting FTMT transcription. In summary, high glucose upregulated FOXA1 expression and stimulated FTMT promoter activity in CFs, thereby promoting FTMT-dependent mitophagy and conferring ferroptosis resistance in CFs.

17.
Pain Physician ; 27(5): E579-E587, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39087967

RESUMEN

BACKGROUND: Hip fracture surgeries in elderly patients often require spinal or general anesthesia, posing risks of severe hypotension and inadequate pain management. The optimal anesthesia type for minimizing these risks remains undetermined. Preliminary studies suggest that a combination of fascia iliaca block (FIB) and low-dose low-specific-gravity spinal anesthesia (LLSA) might offer a solution, but comprehensive evidence is lacking. OBJECTIVES: This study aimed to assess the efficacy of combining FIB with LLSA for reducing severe hypotension and enhancing analgesia during hip fracture surgery in elderly patients. STUDY DESIGN: A prospective, randomized controlled trial was conducted. SETTING: An operating theatre of a tertiary hospital. METHODS: The study comprised 68 patients. They were separated into 2 equal parallel groups 34 patients each: the FIB+LLSA group and the general anesthesia (GA) group. Patients aged 75-96 undergoing primary hip arthroplasty for hip fracture were randomized to receive either FIB+LLSA or GA. The primary outcome was the incidence of severe hypotension; secondary outcomes included postoperative pain, use of rescue analgesia, vasopressor dosage, and complications. RESULTS: We found a significantly lower incidence of severe hypotension in the FIB+LLSA group compared to the GA group (32.4% vs 67.6%). Additionally, postoperative pain scores were significantly lower, and the need for rescue analgesia was reduced in the FIB+LLSA group. Vasopressor use during surgery was also significantly lower in the FIB+LLSA group. The hospital stay was shorter in the FIB+LLSA group, with an average of 5.9 days compared to 6.7 days in the GA group. LIMITATIONS: The study's limitations include its single-center nature, which may limit the generalizability of the findings. Additionally, the inability to conduct a double-blind study could introduce biases, though measures were taken to minimize this. The sample size might not be sufficient to determine the broader implications of LLSA. CONCLUSIONS: Combining FIB with LLSA for elderly patients undergoing hip fracture surgery significantly reduces the incidence of severe intraoperative hypotension and postoperative pain. It also decreases the need for rescue analgesia and shortens hospital stays, suggesting that FIB+LLSA could be a beneficial regional anesthesia technique for elderly hip fracture surgery patients, aligning with enhanced recovery protocols.


Asunto(s)
Anestesia Raquidea , Fracturas de Cadera , Hipotensión , Bloqueo Nervioso , Humanos , Fracturas de Cadera/cirugía , Anciano , Anestesia Raquidea/métodos , Anestesia Raquidea/efectos adversos , Anciano de 80 o más Años , Femenino , Masculino , Bloqueo Nervioso/métodos , Estudios Prospectivos , Dolor Postoperatorio/prevención & control , Dolor Postoperatorio/tratamiento farmacológico , Analgesia/métodos , Fascia
18.
Acta Diabetol ; 2024 Aug 03.
Artículo en Inglés | MEDLINE | ID: mdl-39096329

RESUMEN

AIMS: The impact of macrovascular and microvascular complications, the common vascular complications of type 2 diabetes, on long-term mortality has been well evaluated, but the impact of different complications of newly diagnosed type 2 diabetes (diagnosed within the past 2 years) on long-term mortality has not been reported. We aimed to investigate the relationship between all-cause mortality and vascular complications in U.S. adults (aged ≥ 20 years) with newly diagnosed type 2 diabetes. METHODS: We used data from the 1999-2018 National Health and Nutritional Examination Surveys (NHANES). Cox proportional hazard models was used to assess hazard ratios (HR) and 95% confidence intervals for all-cause mortality. RESULTS: A total of 928 participants were enrolled in this study. At a mean follow-up of 10.8 years, 181 individuals died. In the fully adjusted model, the hazard ratio (HR) (95% confidence interval [CI]) of all-cause mortality for individuals with any single complication compared with those with newly diagnosed type 2 diabetes without complications was 2.24 (1.37, 3.69), and for individuals with two or more complications was 5.34 (3.01, 9.46).Co-existing Chronic kidney disease (CKD) and diabetic retinopathy (DR) at baseline were associated with the highest risk of death (HR 6.07[2.92-12.62]), followed by CKD and cardiovascular disease (CVD) (HR 4.98[2.79-8.89]) and CVD and DR (HR 4.58 [1.98-10.57]). CONCLUSION: The presence of single and combined diabetes complications exerts a long-term synergistic adverse impact on overall mortality in newly diagnosed U.S. adults with type 2 diabetes, underscoring the importance of comprehensive complication screening to enhance risk stratification and treatment.

19.
Res Sq ; 2024 Jul 22.
Artículo en Inglés | MEDLINE | ID: mdl-39108482

RESUMEN

Background: Urate concentration and the physiological regulation of urate homeostasis exhibit clear sex differences. DNA methylation has been shown to explain a substantial proportion of serum urate variance, mediate the genetic effect on urate concentration, and co-regulate with cardiometabolic traits. However, whether urate concentration is associated with DNA methylation in a sex-dependent manner is unknown. Additionally, it is worth investigating if urate changes after perturbations, such as vaccination, are associated with DNA methylation in a sex-specific manner. Methods: We investigated the association between DNA methylation and serum urate concentrations in a Dutch cohort of 325 healthy individuals. Urate concentration and DNA methylation were measured before and after Bacillus Calmette-Guérin (BCG) vaccination, used as a perturbation associated with increased gout flares. The association analysis included united, interaction, and sex-stratified analysis. Validation of the identified CpG sites was conducted using three independent cohorts. Results: 215 CpG sites were associated with serum urate in males, while 5 CpG sites were associated with serum urate in females, indicating sex-specific associations. Circulating urate concentrations significantly increased after BCG vaccination, and baseline DNA methylation was associated with differences in urate concentration before and after vaccination in a sex-specific manner. The CpG sites associated with urate concentration in males were enriched in neuro-protection pathways, whereas in females, the urate change-associated CpG sites were related to lipid and glucose metabolism. Conclusion: Our study enhances the understanding of how epigenetic factors contribute to regulating serum urate levels in a sex-specific manner. These insights have significant implications for the diagnosis, prevention, and treatment of various urate-related diseases and highlight the importance of personalized and sex-specific approaches in medicine.

20.
Brain Res ; 1843: 149115, 2024 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-38977234

RESUMEN

MAF bZIP transcription factor G (MAFG)-driven astrocytes have been reported to promote inflammation in the CNS. However, its function in depression, the primary cause of disability worldwide, has not been well characterized. This study investigated the possible perturbation of heme oxygenase 1 (HMOX1, also known as HO1) by the transcription factor MAFG as an underlying mechanism of the development of depression. The GSE98793 dataset was included for gene expression analysis of whole blood from donors with major depressive disorder and controls, and the target of MAFG was predicted by multiple database mining. Mouse and cellular models of depression were established by chronic unpredictable mild stress (CUMS) and lipopolysaccharide (LPS) treatment of astrocytes, which were treated with MAFG and HMOX1 knockdown plasmids. MAFG was highly expressed in the hippocampal tissues of CUMS-challenged mice and LPS-induced astrocytes. MAFG knockdown alleviated depression-like behaviors in mice. MAFG bound to the HMOX1 promoter and repressed its transcription. Knockdown of HMOX1 exacerbated neuroinflammation in astrocytes and accelerated depression-like behavior in mice. In conclusion, MAFG knockdown attenuated CUMS-stimulated depression-like behaviors in mice by astrocyte-mediated neuroinflammation via restoration of HMOX1.


Asunto(s)
Astrocitos , Depresión , Hemo-Oxigenasa 1 , Enfermedades Neuroinflamatorias , Animales , Humanos , Masculino , Ratones , Astrocitos/metabolismo , Depresión/metabolismo , Modelos Animales de Enfermedad , Hemo-Oxigenasa 1/metabolismo , Hipocampo/metabolismo , Inflamación/metabolismo , Lipopolisacáridos/farmacología , Proteínas de la Membrana/metabolismo , Ratones Endogámicos C57BL , Enfermedades Neuroinflamatorias/metabolismo , Proteínas Represoras/metabolismo , Proteínas Represoras/genética , Estrés Psicológico/metabolismo
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA