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ETHNOPHARMACOLOGICAL RELEVANCE: Major depressive disorder (MDD) is a prevalent condition that affects approximately 350 million people worldwide. Several studies have identified changes in amino acids in the blood of MDD patients, suggesting their potential as biomarkers to better understand their role in depression. Gastrodia elata Blume (GEB) and its active compound gastrodin (GAS) are recognized for their antidepressant properties. However, their effects on amino acid profiles and their potential role in alleviating depression remain poorly understood. Understanding how GEB and GAS influence amino acid metabolism may offer novel insights into their mechanisms in alleviating depression, potentially leading to more targeted therapeutic strategies. AIM OF THE STUDY: This study aimed to investigate the potential role of supplementing GEB and its active compound GAS to reverse altered amino acid profiles in depressed rats. MATERIALS AND METHODS: To achieve this, six-week-old SD rats were induced depressive-like behaviors by the UCMS rat model for 5 weeks. Groups receiving GEB or GAS were administered orally via gavage daily within the UCMS model. Serum samples were collected and analyzed using a targeted metabolomics approach employing LC-MS for amino acid profiling. RESULTS: A total of 38 amino acid metabolites were identified, 17 of which were significantly altered following UCMS. UCMS rats exhibited perturbed arginine biosynthesis, arginine and proline metabolism pathways. Changes in key amino acids in these metabolic pathways were reversed following supplementation with GEB and GAS, which also alleviated depressive symptoms. CONCLUSIONS: In conclusion, UCMS-induced depression in rats causes changes in some amino acid metabolites similar to those found in human depression, validating its relevance as a model for studying depression. Additionally, the research suggests that GEB and GAS may exert antidepressant effects by regulating amino acid metabolism.
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BACKGROUND: Prednisolone/prednisone coadministration with abiraterone may explain abiraterone-related increase in cardiovascular risk. We explored this postulation and glucocorticoid's association with cardiovascular risk. METHODS: Patients with prostate cancer on androgen deprivation therapy and enzalutamide, or abiraterone with 5 mg (ABI + P5) or 10 mg (ABI + P10) daily total prednisolone/prednisone were followed up for major adverse cardiovascular events (MACE). RESULTS: We analyzed 933 patients. ABI + P10, but not enzalutamide, had higher risk of MACE than ABI + P5. Cumulative glucocorticoid dose before enzalutamide/abiraterone initiation was associated with MACE. CONCLUSIONS: Prednisolone/prednisone coadministration with abiraterone likely contributed to abiraterone-related increased cardiovascular risk. Prevalent cumulative glucocorticoid dose was associated with cardiovascular risk.
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Dysregulated protein homeostasis, characterized by abnormal protein accumulation and aggregation, is a key contributor to the progression of neurodegenerative disorders such as Huntington's disease and spinocerebellar ataxia type 3 (SCA3). Previous studies have identified PIAS1 gene variants in patients with late-onset SCA3 and Huntington's disease. This study aims to elucidate the role of PIAS1 and its S510G variant in modulating the pathogenic mechanisms of SCA3. Through in vitro biochemical analyses and in vivo assays, we demonstrate that PIAS1 stabilizes both wild-type and mutant ataxin-3 (ATXN3). The PIAS1 S510G variant, however, selectively reduces the stability and SUMOylation of mutant ATXN3, thereby decreasing its aggregation and toxicity while maintaining the stability of wild-type ATXN3. This effect is mediated by a weakened interaction with the SUMO-conjugating enzyme UBC9 in the presence of mutant ATXN3. In Drosophila models, downregulation of dPIAS1 resulted in reduced levels of mutant ATXN3 and alleviated associated phenotypes, including retinal degeneration and motor dysfunction. Our findings suggest that the PIAS1 S510G variant acts as a genetic modifier of SCA3, highlighting the potential of targeting SUMOylation as a therapeutic strategy for this disease.
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We present orally administrable prodrugs (OSC-GCDIs) of guanidino oseltamivir carboxylate (GOC) based on guanidine cyclic diimide (GCDI) to treat influenza viruses. By concealing the guanidine group, which significantly limits the intestinal absorption, its prodrugs OSC-GCDIs demonstrate dramatic improvement of oral bioavailability. The most promising antiviral substance OSC-GCDI(P) readily forms covalent adducts with serum proteins via a degradable linker after the intestinal absorption. Subsequently, the active species, GOC, is released from the conjugate in a sustained manner, which greatly contributes to improving pharmacokinetic properties. Because of the remarkable improvements in both oral bioavailability and longevity of its active metabolite, OSC-GCDI(P) demonstrates outstanding therapeutic efficacy against both wild-type and oseltamivir-resistant (H275Y) influenza virus strains in a mouse infection model, even with a single oral administration.
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The prevalence of multidrug resistant (MDR) bacterial infections continues to rise as the development of antibiotics needed to combat these infections remains stagnant. MDR enterococci are a major contributor to this crisis. A potential therapeutic approach for combating MDR enterococci is bacteriophage (phage) therapy, which uses lytic viruses to infect and kill pathogenic bacteria. While phages that lyse some strains of MDR enterococci have been identified, other strains display high levels of resistance and the mechanisms underlying this resistance are poorly defined. Here, we use a CRISPR interference (CRISPRi) screen to identify a genetic locus found on a mobilizable plasmid from Enterococcus faecalis involved in phage resistance. This locus encodes a putative serine recombinase followed by a Type IV restriction enzyme (TIV-RE) that we show restricts the replication of phage phi47 in vancomycin-resistant E. faecalis. We further find that phi47 evolves to overcome restriction by acquiring a missense mutation in a TIV-RE inhibitor protein. We show that this inhibitor, termed type IV restriction inhibiting factor A (tifA), binds and inactivates diverse TIV-REs. Overall, our findings advance our understanding of phage defense in drug-resistant E. faecalis and provide mechanistic insight into how phages evolve to overcome antiphage defense systems.
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Bacteriófagos , Enterococcus faecalis , Proteínas Virales , Enterococcus faecalis/virología , Enterococcus faecalis/genética , Bacteriófagos/genética , Bacteriófagos/fisiología , Proteínas Virales/metabolismo , Proteínas Virales/genética , Enzimas de Restricción del ADN/metabolismo , Enzimas de Restricción del ADN/genética , Farmacorresistencia Bacteriana Múltiple/genética , Plásmidos/genética , Enterococos Resistentes a la Vancomicina/genética , Antibacterianos/farmacología , Proteínas Bacterianas/metabolismo , Proteínas Bacterianas/genéticaRESUMEN
BACKGROUND: Diet and gut microbiota contribute to non-alcoholic steatohepatitis (NASH) progression. High-fat diets (HFDs) change gut microbiota compositions, induce gut dysbiosis, and intestinal barrier leakage, which facilitates portal influx of pathogen-associated molecular patterns including lipopolysaccharides (LPS) to the liver and triggers inflammation in NASH. Current therapeutic drugs for NASH have adverse side effects; however, several foods and herbs that exhibit hepatoprotection could be an alternative method to prevent NASH. METHODS: We investigated ginger essential oil (GEO) against palm oil-containing HFDs in LPS-injected murine NASH model. RESULTS: GEO reduced plasma alanine aminotransferase levels and hepatic pro-inflammatory cytokine levels; and increased antioxidant catalase, glutathione reductase, and glutathione levels to prevent NASH. GEO alleviated hepatic inflammation through mediated NLR family pyrin domain-containing 3 (NLRP3) inflammasome and LPS/Toll-like receptor four (TLR4) signaling pathways. GEO further increased beneficial bacterial abundance and reduced NASH-associated bacterial abundance. CONCLUSION: This study demonstrated that GEO prevents NASH progression which is probably associated with the alterations of gut microbiota and inhibition of the LPS/TLR4/NF-κB pathway. Hence, GEO may offer a promising application as a dietary supplement for the prevention of NASH.
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Microbioma Gastrointestinal , Inflamasomas , Lipopolisacáridos , Ratones Endogámicos C57BL , Proteína con Dominio Pirina 3 de la Familia NLR , Enfermedad del Hígado Graso no Alcohólico , Aceites Volátiles , Transducción de Señal , Receptor Toll-Like 4 , Zingiber officinale , Animales , Enfermedad del Hígado Graso no Alcohólico/prevención & control , Enfermedad del Hígado Graso no Alcohólico/metabolismo , Proteína con Dominio Pirina 3 de la Familia NLR/metabolismo , Microbioma Gastrointestinal/efectos de los fármacos , Receptor Toll-Like 4/metabolismo , Aceites Volátiles/farmacología , Aceites Volátiles/uso terapéutico , Ratones , Inflamasomas/metabolismo , Inflamasomas/efectos de los fármacos , Masculino , Transducción de Señal/efectos de los fármacos , Dieta Alta en Grasa/efectos adversos , Progresión de la Enfermedad , Hígado/metabolismo , Hígado/efectos de los fármacos , Modelos Animales de EnfermedadRESUMEN
Polycystic ovary syndrome (PCOS) is a prevalent endocrine disorder affecting women of reproductive age globally. Emerging evidence suggests that the dysregulation of microRNAs (miRNAs) and gut dysbiosis are linked to the development of PCOS. In this study, the effects of Lacticaseibacillus paracasei subsp. paracasei DSM 27449 (DSM 27449) were investigated in a rat model of PCOS induced by letrozole. The administration of DSM 27449 resulted in improved ovarian function, reduced cystic follicles, and lower serum testosterone levels. Alterations in miRNA expressions and increased levels of the pro-apoptotic protein Bax in ovarian tissues were observed in PCOS-like rats. Notably, the administration of DSM 27449 restored the expression of miRNAs, including miR-30a-5p, miR-93-5p, and miR-223-3p, leading to enhanced ovarian function through the downregulation of Bax expressions in ovarian tissues. Additionally, 16S rRNA sequencing showed changes in the gut microbiome composition after letrozole induction. The strong correlation between specific bacterial genera and PCOS-related parameters suggested that the modulation of the gut microbiome by DSM 27449 was associated with the improvement of PCOS symptoms. These findings demonstrate the beneficial effects of DSM 27449 in ameliorating PCOS symptoms in letrozole-induced PCOS-like rats, suggesting that DSM 27449 may serve as a beneficial dietary supplement with the therapeutic potential for alleviating PCOS.
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Modelos Animales de Enfermedad , Microbioma Gastrointestinal , Letrozol , MicroARNs , Síndrome del Ovario Poliquístico , Animales , Síndrome del Ovario Poliquístico/inducido químicamente , Síndrome del Ovario Poliquístico/tratamiento farmacológico , Síndrome del Ovario Poliquístico/metabolismo , Femenino , Ratas , Microbioma Gastrointestinal/efectos de los fármacos , MicroARNs/genética , MicroARNs/metabolismo , Ovario/efectos de los fármacos , Ovario/metabolismo , Ovario/patología , Probióticos , Testosterona/sangre , Ratas Sprague-Dawley , ARN Ribosómico 16S/genética , Proteína X Asociada a bcl-2/metabolismo , Proteína X Asociada a bcl-2/genéticaRESUMEN
Background: Relationships between the social determinants of health (SDOH) and cardiovascular health (CVH) of cancer survivors are underexplored. Objectives: This study sought to investigate associations between the SDOH and CVH of adult cancer survivors. Methods: Data from the U.S. National Health Interview Survey (2013-2017) were used. Participants reporting a history of cancer were included, excluding those with only nonmelanotic skin cancer, or with missing data for any domain of SDOH or CVH. SDOH was quantified with a 6-domain, 38-item score, consistent with the Centers for Disease Control and Prevention recommendations (higher score indicated worse deprivation). CVH was quantified based on the American Heart Association's Life's Essential 8, but due to unavailable detailed dietary data, a 7-item CVH score was used, with a higher score indicating worse CVH. Survey-specific multivariable Poisson regression was used to test associations between SDOH quartiles and CVH. Results: Altogether, 8,254 subjects were analyzed, representing a population of 10,887,989 persons. Worse SDOH was associated with worse CVH (highest vs lowest quartile: risk ratio 1.30; 95% CI: 1.25-1.35; P < 0.001), with a grossly linear relationship between SDOH and CVH scores. Subgroup analysis found significantly stronger associations in younger participants (P interaction = 0.026) or women (P interaction = 0.001) but without significant interactions with race (P interaction = 0.051). Higher scores in all domains of SDOH were independently associated with worse CVH (all P < 0.001). Higher SDOH scores were also independently associated with each component of the CVH score (all P < 0.05 for highest SDOH quartile). Conclusions: An unfavorable SDOH profile was independently associated with worse CVH among adult cancer survivors in the United States.
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BACKGROUND: Enzalutamide and abiraterone may differ in their immunomodulatory effects, and the prednisone coadministered with abiraterone can be immunosuppressive. This study aimed to compare the risk of different types of infection in patients with prostate cancer receiving enzalutamide or abiraterone in combination with androgen deprivation therapy. METHODS: Patients with prostate cancer receiving enzalutamide or abiraterone in addition to androgen deprivation therapy in Hong Kong between December 1999 to March 2021 were identified in this retrospective cohort study and followed up until September 2021, death, or crossover. Outcomes, including any sepsis, pneumonia, urinary tract infection, cellulitis or skin abscess, central nervous system infections, and tuberculosis, were analyzed as both time-to-event outcomes (multivariable Fine-Gray regression, with mortality considered a competing event) and recurrent-event outcomes (multivariable negative binomial regression). RESULTS: Altogether, 1582 patients were analyzed (923 abiraterone users; 659 enzalutamide users) with a median follow-up of 10.6 months (interquartile range: 5.3-19.9 months). Compared to abiraterone users, enzalutamide users had lower cumulative incidences of sepsis (adjusted subhazard ratio [SHR] 0.70 [0.53-0.93], p = .014), pneumonia (adjusted SHR 0.76 [0.59-0.99], p = .040), and cellulitis or skin abscess (adjusted SHR 0.55 [0.39-0.79], p = .001), but not urinary tract infection (adjusted SHR 0.91 [0.62-1.35], p = .643). Associations between exposure and central nervous system infections and tuberculosis were not assessed because of low event rates. Analyzing the outcomes as recurrent events gave similar results. Enzalutamide use may be associated with a lower risk of urinary tract infection in patients with diabetes mellitus. CONCLUSIONS: Compared to abiraterone users, enzalutamide users have significantly lower risks of sepsis, pneumonia, cellulitis, or skin abscess.
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Androstenos , Benzamidas , Nitrilos , Feniltiohidantoína , Humanos , Masculino , Feniltiohidantoína/uso terapéutico , Feniltiohidantoína/efectos adversos , Feniltiohidantoína/análogos & derivados , Nitrilos/uso terapéutico , Anciano , Estudios Retrospectivos , Androstenos/uso terapéutico , Androstenos/efectos adversos , Neoplasias de la Próstata/tratamiento farmacológico , Persona de Mediana Edad , Infecciones Urinarias/epidemiología , Anciano de 80 o más Años , Sepsis/epidemiología , Antagonistas de Andrógenos/efectos adversos , Antagonistas de Andrógenos/uso terapéutico , Infecciones/inducido químicamente , Infecciones/epidemiología , Neumonía/inducido químicamente , Neumonía/epidemiología , Protocolos de Quimioterapia Combinada Antineoplásica/uso terapéutico , Protocolos de Quimioterapia Combinada Antineoplásica/efectos adversos , Neoplasias de la Próstata Resistentes a la Castración/tratamiento farmacológico , Hong Kong/epidemiologíaRESUMEN
Objective: The association of age-related macular degeneration (AMD) with the intake of high and low fatty acids (FAs), respectively, remains controversial. To this end, we performed a comprehensive meta-analysis of all the existing studies on the association of various intake levels of FA subtypes with AMD to determine these associations. Methods: A systematic search of PubMed, Web of Science, Cochrane Library, and EMBASE databases was conducted from inception to September 2023. To compare the highest and lowest groups, odds ratio (OR) with 95% confidence intervals (CIs) was analyzed with a random-effects model/fixed-effects model. Results: A high intake of omega-3 LCPUFAs (OR:0.67; 95%CI:[0.51, 0.88]; p = 0.004), DHA (OR:0.80; 95%CI:[0.70, 0.90]; p < 0.001), EPA (OR:0.91; 95%CI:[0.86, 0.97]; p = 0.004), and simultaneous intake of DHA and EPA (OR:0.79; 95%CI:[0.67, 0.93]; p = 0.035) significantly reduced the risk of overall AMD. Conversely, a high intake of trans-FAs (OR: 2.05; 95%CI: [1.29, 3.25]; p = 0.002) was significantly related to an increased risk of advanced AMD compared to the low-intake group. The subgroup analysis results are shown in the articles. Conclusion: Increasing dietary intake of omega-3 LCPUFAs, specifically DHA, and EPA, or the simultaneous intake of DHA and EPA, is significantly associated with a reduced risk of overall AMD. Various subtypes of omega-3 also have a significant association with a reduced risk of different stages of AMD. The high intake of trans-fatty acids (TFAs) is significantly and positively correlated with the risk of advanced AMD. This could further support the idea that consuming foods rich in omega-3 LCPUFAs and reducing consumption of foods rich in TFAs may prevent AMD. Systematic review registration: https://www.crd.york.ac.uk/prospero/, identifier CRD42023467227.
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OBJECTIVE: The aim of the present study was to compare the fetal umbilical artery blood flow parameters in the third trimester and perinatal outcomes between pregnant women with and without thalassemia minor in South China. METHODS: This was a retrospective cohort study. Doppler ultrasound was used to detect fetal umbilical artery hemodynamics in pregnant women with or without thalassemia minor during the third trimester. The main parameters assessed were umbilical artery peak systolic flow velocity/end-diastolic flow velocity (S/D), resistance index (RI), pulsation index (PI), and relevant perinatal outcomes. RESULTS: This study included 540 pregnant women, 180 with thalassemia minor and 360 being healthy controls. In the third trimester, the thalassemia minor group had higher umbilical artery S/D (P = 0.002), RI (P = 0.002), and PI (P = 0.012) than healthy pregnant women, as well as lower levels of hemoglobin (Hb) (P < 0.001) and higher ferritin levels (P < 0.001). Compared to the non-thalassemia group, neonatal body weight in the thalassemia minor group was significantly lower (P = 0.001). Additionally, the incidence of maternal anemia (odds ratio [OR] 3.92; 95% confidence interval [CI]: 2.57-5.99, P < 0.001), low birth weight (OR 15.35; 95% CI: 1.71-137.93, P = 0.015), fetal distress (OR 2.18; 95% CI: 1.12-4.26, P = 0.023), neonatal asphyxia (OR 12.81; 95% CI: 1.40-117.33, P = 0.024), oligohydramnios (OR 18.25; 95% CI: 2.21-150.36, P = 0.007) and Apgar score <7 at 1 min after birth (OR 7.97; 95% CI: 1.53-41.54, P = 0.014) was significantly higher in the thalassemia minor group. CONCLUSION: Pregnant women with thalassemia minor have higher umbilical artery S/D, RI and PI during the third trimester and a higher risk of adverse perinatal outcomes.
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Water has been recognized in promoting material removal, traditionally ascribed to friction reduction and thermal dissipation. However, the physicochemical interactions between water and the workpiece have often been overlooked. This work sheds light on how the physicochemical interactions that occur between water (H2O) and copper (Cu) workpiece influence material deformations during the cutting process. ReaxFF molecular dynamics simulations were employed as the primary method to study the atomistic physical and chemical interactions between the applied medium and the workpiece. Upon contact with the Cu surface, H2O dissociated into OH- ions, H+ ions, and traces of O2- ions. The OH- and O2- ions chemically reacted with Cu to form bonds that weakened the Cu-Cu bonds by elongation, while the H+ ions gained electrons and diffused into the Cu lattice as H- ions. The weakening of surface Cu bonds promoted plastic deformation and reduced the difficulty of material removal. Meanwhile, further addition of H2O molecules saw a plateau in hydrolysis and more dominance of H2O physical adsorption on Cu, which weakens the elongation of Cu-Cu bonds. While the ideal case for atomic-scale material removal was found with an optimal number of 240 H2O molecules, the presented Cu material state with more H2O molecules could account for the observations in microcutting. The constricted nature of physical adsorption and hydrogen ion diffusion in the surface layer prevented the propagation of dislocations through the surface, which subsequently caused pinning points to be closer together during chip formation as observed by smaller chip fold widths on the microscale. Theoretical and experimental analysis identified the importance of accounting for physicochemical interactions between surface media and the workpiece when considering material deformations at micronanoscale.
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Dietary emulsifiers are linked to various diseases. The recent discovery of the role of gut microbiota-host interactions on health and disease warrants the safety reassessment of dietary emulsifiers through the lens of gut microbiota. Lecithin, sucrose fatty acid esters, carboxymethylcellulose (CMC), and mono- and diglycerides (MDG) emulsifiers are common dietary emulsifiers with high exposure levels in the population. This study demonstrates that sucrose fatty acid esters and carboxymethylcellulose induce hyperglycemia and hyperinsulinemia in a mouse model. Lecithin, sucrose fatty acid esters, and CMC disrupt glucose homeostasis in the in vitro insulin-resistance model. MDG impairs circulating lipid and glucose metabolism. All emulsifiers change the intestinal microbiota diversity and induce gut microbiota dysbiosis. Lecithin, sucrose fatty acid esters, and CMC do not impact mucus-bacterial interactions, whereas MDG tends to cause bacterial encroachment into the inner mucus layer and enhance inflammation potential by raising circulating lipopolysaccharide. Our findings demonstrate the safety concerns associated with using dietary emulsifiers, suggesting that they could lead to metabolic syndromes.
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Disbiosis , Emulsionantes , Microbioma Gastrointestinal , Enfermedades Metabólicas , Animales , Disbiosis/inducido químicamente , Disbiosis/microbiología , Microbioma Gastrointestinal/efectos de los fármacos , Ratones , Masculino , Enfermedades Metabólicas/inducido químicamente , Enfermedades Metabólicas/microbiología , Enfermedades Metabólicas/metabolismo , Enfermedades Metabólicas/etiología , Ratones Endogámicos C57BL , Carboximetilcelulosa de Sodio , Sacarosa/efectos adversos , Sacarosa/administración & dosificación , Sacarosa/metabolismo , Resistencia a la Insulina , LecitinasRESUMEN
BACKGROUND: Impaired upper limb function in stroke survivors is characterized by muscle weakness, increased muscle tone, contracture, or impaired motor control. OBJECTIVE: We aimed to evaluate the effectiveness of Kinesio-taping application for functional recovery on the affected arm and forearm during rehabilitation. METHODS: Forty-one patients eligible for this study were randomly assigned to either the Kinesio-taping group (nâ=â21), receiving Kinesio-taping intervention and conventional therapy, or control group (nâ=â20), receiving sham Kinesio-taping intervention and conventional therapy. The whole intervention lasted for 3 weeks. Fugl-Meyer assessment of the upper extremity, Barthel Index, the Stroke Impact Scale, and modified Ashworth scale were measured at 3 time points: baseline, post-treatment (3rd week), and follow-up (6th week). RESULTS: In the Kinesio-taping group, there were significant differences in the upper extremity (pâ=â0.003), wrist (pâ=â0.000) and hand (pâ=â0.000) parts of the Fugl-Meyer assessment of the upper extremity between the three assessment times. On the other hand, the Barthel Index showed significant differences in both groups after therapy. CONCLUSION: Combining conventional rehabilitation with Kinesio-taping intervention may improve functional motor performance of both the proximal and distal parts of the affected upper extremity in stroke survivors, with potential benefits for activity of daily living.
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Actividades Cotidianas , Recuperación de la Función , Rehabilitación de Accidente Cerebrovascular , Accidente Cerebrovascular , Extremidad Superior , Humanos , Femenino , Masculino , Persona de Mediana Edad , Rehabilitación de Accidente Cerebrovascular/métodos , Extremidad Superior/fisiopatología , Accidente Cerebrovascular/fisiopatología , Anciano , Recuperación de la Función/fisiología , Cinta Atlética , Resultado del Tratamiento , Sobrevivientes , Adulto , Enfermedad CrónicaRESUMEN
OBJECTIVE: To investigate whether a gap year for either research or a master's degree is associated with interview offers or match outcomes among otolaryngology applicants. METHODS: Using the Texas Seeking Transparency in Application to Residency (Texas STAR) database, we conducted a cross-sectional analysis of otolaryngology applicants from 2018 to 2022. Applicants were stratified based on the presence and type of gap year during medical school. Applicant characteristics, signaling, research productivity, and application costs were analyzed, with primary outcomes including number of interview offers and match status. RESULTS: Among 564 otolaryngology applicant respondents to the Texas STAR survey, 160 (28%) reported a gap year, including 64 (40%) applicants participating in a research year, 65 (41%) completing a Master of Public Health or Science (MPH and MSc), and 31 (19%) completing a Master of Business Administration, Education, or other degree (MBA and MEd). Gap-year applicants who completed a research year or MPH/MSc degree received more interview offers (P < .01) than MBA, MEd applicants, or those without a gap year. Applicants with a research year had the most publications, oral presentations, abstracts, posters, and research experiences (all P < .01). When controlling for USMLE scores, clerkship honors, and applications submitted, applicants completing a research year or an MPH/MSc-degree received increased interview offers (P < .01). No significant differences were seen in expenditures or match rates. CONCLUSIONS: Research and MPH/MSc gap years were associated with increased residency interview offers but not increased match success. Further longitudinal studies are needed to assess how yearlong experiences affect long-term career outcomes.
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Internado y Residencia , Otolaringología , Humanos , Otolaringología/educación , Estudios Transversales , Internado y Residencia/estadística & datos numéricos , Femenino , Masculino , Texas , Facultades de Medicina , Investigación Biomédica , Adulto , Selección de Profesión , Entrevistas como Asunto , Criterios de Admisión EscolarRESUMEN
Huntington's disease (HD) is a hereditary neurodegenerative disorder characterized by involuntary movements, cognitive deficits, and psychiatric symptoms. Currently, there is no cure, and only limited treatments are available to manage the symptoms and to slow down the disease's progression. The molecular and cellular mechanisms of HD's pathogenesis are complex, involving immune cell activation, altered protein turnover, and disturbance in brain energy homeostasis. Microglia have been known to play a dual role in HD, contributing to neurodegeneration through inflammation but also enacting neuroprotective effects by clearing mHTT aggregates. However, little is known about the contribution of microglial metabolism to HD progression. This study explores the impact of a microglial metabolite transporter, equilibrative nucleoside transporter 3 (ENT3), in HD. Known as a lysosomal membrane transporter protein, ENT3 is highly enriched in microglia, with its expression correlated with HD severity. Using the R6/2 ENT3-/- mouse model, we found that the deletion of ENT3 increases microglia numbers yet worsens HD progression, leading to mHTT accumulation, cell death, and disturbed energy metabolism. These results suggest that the delicate balance between microglial metabolism and function is crucial for maintaining brain homeostasis and that ENT3 has a protective role in ameliorating neurodegenerative processes.
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Modelos Animales de Enfermedad , Progresión de la Enfermedad , Enfermedad de Huntington , Microglía , Proteínas de Transporte de Nucleósidos , Animales , Humanos , Masculino , Ratones , Encéfalo/metabolismo , Proteína Huntingtina/metabolismo , Proteína Huntingtina/genética , Enfermedad de Huntington/metabolismo , Enfermedad de Huntington/genética , Ratones Endogámicos C57BL , Ratones Noqueados , Microglía/metabolismo , Proteínas de Transporte de Nucleósidos/metabolismo , Proteínas de Transporte de Nucleósidos/genéticaAsunto(s)
Ansiedad , Demencia , Depresión , Hipoglucemiantes , Metformina , Humanos , Hong Kong/epidemiología , Demencia/epidemiología , Metformina/uso terapéutico , Masculino , Femenino , Anciano , Hipoglucemiantes/uso terapéutico , Hipoglucemiantes/efectos adversos , Depresión/tratamiento farmacológico , Depresión/epidemiología , Ansiedad/epidemiología , Ansiedad/tratamiento farmacológico , Diabetes Mellitus Tipo 2/tratamiento farmacológico , Diabetes Mellitus Tipo 2/epidemiología , Persona de Mediana EdadRESUMEN
BACKGROUND: Blood typing is essential for safe transfusions and is performed serologically or genetically. Genotyping predominantly focuses on coding regions, but non-coding variants may affect gene regulation, as demonstrated in the ABO, FY and XG systems. To uncover regulatory loci, we expanded a recently developed bioinformatics pipeline for discovery of non-coding variants by including additional epigenetic datasets. METHODS: Multiple datasets including ChIP-seq with erythroid transcription factors (TFs), histone modifications (H3K27ac, H3K4me1), and chromatin accessibility (ATAC-seq) were analyzed. Candidate regulatory regions were investigated for activity (luciferase assays) and TF binding (electrophoretic mobility shift assay, EMSA, and mass spectrometry, MS). RESULTS: In total, 814 potential regulatory sites in 47 blood-group-related genes were identified where one or more erythroid TFs bound. Enhancer candidates in CR1, EMP3, ABCB6, and ABCC4 indicated by ATAC-seq, histone markers, and co-occupancy of 4 TFs (GATA1/KLF1/RUNX1/NFE2) were investigated but only CR1 and ABCC4 showed increased transcription. Co-occupancy of GATA1 and KLF1 was observed in the KEL promoter, previously reported to contain GATA1 and Sp1 sites. TF binding energy scores decreased when three naturally occurring variants were introduced into GATA1 and KLF1 motifs. Two of three GATA1 sites and the KLF1 site were confirmed functionally. EMSA and MS demonstrated increased GATA1 and KLF1 binding to the wild-type compared to variant motifs. DISCUSSION: This combined bioinformatics and experimental approach revealed multiple candidate regulatory regions and predicted TF co-occupancy sites. The KEL promoter was characterized in detail, indicating that two adjacent GATA1 and KLF1 motifs are most crucial for transcription.
Asunto(s)
Antígenos de Grupos Sanguíneos , Epigénesis Genética , Humanos , Antígenos de Grupos Sanguíneos/genética , Factor de Transcripción GATA1/genética , Factores de Transcripción de Tipo Kruppel/genética , Secuencias Reguladoras de Ácidos Nucleicos/genética , Factores de Transcripción/genética , Factores de Transcripción/metabolismoRESUMEN
Understanding rhinoplasty characteristics important to patients, physicians, and society is essential for evaluating outcomes and designing optimal treatment plans. The authors aimed to elucidate specific rhinoplasty-related outcomes that are most important to patients, surgeons, and the general population. A cross-sectional survey comprising 11 rhinoplasty-specific characteristics, was distributed to patients, facial plastic surgeons, and the general population. Adult patients presenting for rhinoplasty consideration or follow-up after undergoing rhinoplasty were recruited. Characteristics rankings were compared between the 3 respondent groups using Spearman's rank correlation coefficient (ρ). Responses from 150 surgeons, 111 patients, and 102 lay individuals from the general population were included for analysis. When ranking rhinoplasty-specific characteristics in order of importance, patients and the general population ranked "ability to breathe through nose while awake" first and "overall appearance of nose" as second. Surgeons ranked "overall appearance of nose" first and "ability to breathe through nose while awake" second. There were strong correlations between patients' and surgeons' rankings (Spearman's ρ=0.836, P =0.002), between patients' and the general population's rankings (Spearman's ρ=0.773, P =0.007), and between surgeons' and the general population's rankings (Spearman's ρ=0.782, P =0.006). Our results highlight a significant correlation between characteristics of the "ideal" nose as determined by patients, surgeons, and the general population.