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1.
J Exp Bot ; 2024 Aug 08.
Artículo en Inglés | MEDLINE | ID: mdl-39113673

RESUMEN

Successful plant reproduction depends on the adequate development of flower organs controlled by cell proliferation and other processes. The SCI1 gene regulates cell proliferation and affects the final size of the female reproductive organ. To unravel the molecular mechanism exerted by SCI1 in cell proliferation control, we searched for its interaction partners through semi-in vivo pulldown experiments, uncovering a cyclin-dependent kinase, NtCDKG;2. Bimolecular fluorescence complementation (BiFC) and co-localization experiments showed that SCI1 interacts with NtCDKG;2 and its cognate NtCyclin L in nucleoli and splicing speckles. The screening of a yeast two-hybrid (Y2H) cDNA library using SCI1 as bait revealed a novel DEAD-box RNA helicase (NtRH35). The interaction between the NtCDKG;2-NtCyclin L complex, and NtRH35 was also shown. Subcellular localization experiments showed that SCI1, NtRH35, and the NtCDKG;2-NtCyclin L complex associate with each other within splicing speckles. The Y2H screening of NtCDKG;2 and NtRH35 identified the conserved spliceosome components U2a', NKAP, and CACTIN. This work presents SCI1 and its interactors NtCDKG;2-NtCyclin L complex, and NtRH35 as new spliceosome-associated proteins. Our findings reveal a network of interactions and suggest that SCI1 may regulate cell proliferation through the splicing process. This study provides new valuable insights into the intricate molecular pathways governing plant development.

2.
PLoS Pathog ; 20(8): e1012504, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-39213446

RESUMEN

Oropouche fever, a debilitating illness common in South America, is caused by Oropouche virus (OROV), an arbovirus. OROV belongs to the Peribunyaviridae family, a large group of RNA viruses. Little is known about the biology of Peribunyaviridae in host cells, especially assembly and egress processes. Our research reveals that the small GTPase Rab27a mediates intracellular transport of OROV induced compartments and viral release from infected cells. We show that Rab27a interacts with OROV glycoproteins and colocalizes with OROV during late phases of the infection cycle. Moreover, Rab27a activity is required for OROV trafficking to the cell periphery and efficient release of infectious particles. Consistently, depleting Rab27a's downstream effector, Myosin Va, or inhibiting actin polymerization also hinders OROV compartments targeting to the cell periphery and infectious viral particle egress. These data indicate that OROV hijacks Rab27a activity for intracellular transport and cell externalization. Understanding these crucial mechanisms of OROV's replication cycle may offer potential targets for therapeutic interventions and aid in controlling the spread of Oropouche fever.


Asunto(s)
Cadenas Pesadas de Miosina , Miosina Tipo V , Liberación del Virus , Proteínas rab27 de Unión a GTP , Proteínas rab27 de Unión a GTP/metabolismo , Humanos , Liberación del Virus/fisiología , Miosina Tipo V/metabolismo , Miosina Tipo V/genética , Cadenas Pesadas de Miosina/metabolismo , Infecciones por Bunyaviridae/metabolismo , Infecciones por Bunyaviridae/virología , Orthobunyavirus/metabolismo , Orthobunyavirus/fisiología , Replicación Viral/fisiología , Animales , Interacciones Huésped-Patógeno
3.
J Environ Manage ; 368: 122174, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39151339

RESUMEN

The aim of this work was to stabilize excess sludge (ES) coming from a wastewater treatment plant (WWTP) by vermistabilization and to evaluate ecotoxicological effects over the earthworm species Eisenia fetida. Three mixtures were made up in triplicate using different volume ratios of ES and soil (S) (100% ES, 70:30% ES:S and 30:70% ES:S in wet weight basis). Earthworms were added in order to compare vermicomposting vs. natural stabilization. The mixtures were monitored over 130 days through physical, chemical, pathological and biological analysis, following quality standards depicted in the US EPA 40 CFR Part 503, local regulations and background studies. Histopathological samples were processed as biomarkers of acute and chronic toxicity on earthworms, and germination assays were performed at the end of the experiment to assess phytotoxicity. In terms of pathogen depletion comparing initial and final values from each treatment, the mixtures with higher ES proportions (70 and 100%) with earthworms were the most efficient ones registering 64.8 and 75.5% of reduction of fecal coliforms (FC) respectively, while the lowest ES proportion with earthworms (30%) showed 54.7%. Final pathogens content in all the treatments with earthworms were significantly lower (ranged from 1360 to 1760 MPN g total solids-1) than the values registered in treatments without earthworms (ranged from 2400 to 4000 MPN g total solids-1) (p < 0.05). However, none of the treatments attained class A categorization (FC ≤ 1000 MPN g total solids-1) in terms of FC. Also, values of mean cocoon production and hatched juveniles along time were significantly higher in the treatments with 100 and 70% ES (p < 0.05), while the higher mean adult biomass was detected in the treatment with 30% ES. Volatile solids decrease ranged between 8.45 and 22.34% in treatments with earthworms and all values of specific oxygen uptake rate were below 1.5 mg O2 h -1 g total solids -1. There were not negative effects over behavior or reproduction of E. fetida adults, nor the presence of external and internal injuries. Final products from mixtures with earthworms presented a humus-like structure, were odorless and reached maturity values -presenting no phytotoxicity-with significant differences between germination index values of treatments with and without earthworms (p < 0.05). Vermistabilization is a successful eco-technology to sanitize excess sludge, acquiring an added-value material and contributing to its revalorization as organic amendments or fertilizers in soils within the circular economy framework and the United Nations' Sustainability Development Goals.


Asunto(s)
Oligoquetos , Aguas del Alcantarillado , Animales , Oligoquetos/efectos de los fármacos , Compostaje , Suelo/química
4.
An Acad Bras Cienc ; 96(3): e20220441, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-39046015

RESUMEN

The implementation of restrictive measures during the pandemic drastically changed the routine and habits of the population. In the academic sphere, the sudden closure of universities difficulted any advance planning. The objective of this study was to verify the effects of the pandemic on the routine, physical and mental health of students at a public university in southern Brazil. This is a cross-sectional study that applied a questionnaire from May to August 2020. The target population comprised 528 undergraduates. The questionnaire addressed questions about sociodemographic characteristics, physical and mental health. A response was obtained from 406 participants. During the quarantine period evaluated, the main results were: 66.2% reported worsening of anxiety symptoms; 57.6% declared that their physical health was "reasonable" to "bad". As for the quality of sleep there was an increase in 98.8% in the responses "bad sleep quality" and "very bad sleep quality"; increase in 26.6% for presence bruxism; 12.5% for orofacial pain, 3.8% for headache. It is concluded that there were several negative effects, among these effects, it was observed higher levels of anxiety, worsening physical health and quality of sleep, increase in the prevalence of bruxism, as well as the presence of orofacial pain and headache.


Asunto(s)
COVID-19 , Estudiantes , Humanos , COVID-19/epidemiología , COVID-19/psicología , Brasil/epidemiología , Estudios Transversales , Estudiantes/psicología , Estudiantes/estadística & datos numéricos , Masculino , Femenino , Universidades , Adulto Joven , Ansiedad/epidemiología , Encuestas y Cuestionarios , Adulto , Salud Mental , SARS-CoV-2 , Pandemias , Adolescente , Estado de Salud
5.
ACS Appl Bio Mater ; 7(7): 4580-4592, 2024 Jul 15.
Artículo en Inglés | MEDLINE | ID: mdl-38958462

RESUMEN

Nanomaterial-mediated antibacterial photodynamic therapy (aPDT) emerges as a promising treatment against antibiotic-resistant bacterial biofilms. Specifically, titanium dioxide nanoparticles (TiO2 NPs) are being investigated as photosensitizers in aPDT to address biofilm related diseases. To enhance their photocatalytic performance in the visible spectral range for biomedical applications, various strategies have been adopted, including reduction of TiO2 NPs. However, despite improvements in visible-light photoactivity, reduced TiO2 NPs have yet to reach their expected performance primarily due to the instability of oxygen vacancies and their tendency to reoxidize easily. To address this, we present a two-step approach to fabricate highly visible-light active and stable TiO2 NP photocatalysts, involving nitrogen doping followed by a magnesium-assisted reductive annealing process. X-ray photoelectron spectroscopy analysis of the synthesized reduced nitrogen-doped TiO2 NPs (H:Mg-N-TiO2 NPs) reveals that the presence of nitrogen stabilizes oxygen vacancies and reduced Ti species, leading to increased production of reactive oxygen species under visible-light excitation. The improved aPDT efficiency translates to a 3-fold enhancement in the antibiofilm activity of nitrogen-doped compared to undoped reduced TiO2 NPs against both Gram-positive (Streptococcus mutans) and Gram-negative (Porphyromonas gingivalis, Fusobacterium nucleatum) oral pathogens. These results underscore the potential of H:Mg-N-TiO2 NPs in aPDT for combating bacterial biofilms effectively.


Asunto(s)
Antibacterianos , Biopelículas , Ensayo de Materiales , Nitrógeno , Tamaño de la Partícula , Titanio , Titanio/química , Titanio/farmacología , Biopelículas/efectos de los fármacos , Nitrógeno/química , Nitrógeno/farmacología , Antibacterianos/farmacología , Antibacterianos/química , Antibacterianos/síntesis química , Catálisis , Nanopartículas/química , Pruebas de Sensibilidad Microbiana , Luz , Materiales Biocompatibles/química , Materiales Biocompatibles/farmacología , Procesos Fotoquímicos
6.
Chemosphere ; 363: 142923, 2024 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-39059642

RESUMEN

Biobeds are presented as an alternative for good pesticide wastewater management on farms. This work proposes a new test for in-situ biomonitoring of pesticide detoxification in biobeds. It is based on the assessment of visually appreciable injuries to Eisenia fetida. The severity of the injury to each exposed individual is assessed from the morphological changes observed in comparison with the patterns established in seven categories and, an injury index is calculated. A linear relationship between the proposed injury index and the pesticide concentration was determined for each pesticide sprayed individually in the biomixture. The five pesticides used were atrazine, prometryn, clethodim, haloxyfop-P-methyl and dicamba. In addition, a multiple linear regression model (i.e., a multivariate response surface) was fitted, which showed a good generalization capacity. The sensitivity range of the injury test was tested from 0.01 to 630 mg kg-1 as the total pesticide concentration. This index is then used to monitor the detoxification of these pesticides in a biomixture (composed of wheat stubble, river waste, and soil, 50:25:25% by volume) over 210 days. The results are compared with standardized tests (Eisenia fetida avoidance test and Lactuca sativa seed germination test) carried out on the same biomixture. The results are also compared with data on the removal of pesticides. The injury test showed a better correlation with the removal of pesticides than the avoidance test and seed germination test. This simple and inexpensive test has proved to be useful for decontamination in-situ monitoring in biobeds.


Asunto(s)
Monitoreo Biológico , Oligoquetos , Plaguicidas , Plaguicidas/análisis , Plaguicidas/metabolismo , Oligoquetos/metabolismo , Monitoreo Biológico/métodos , Animales , Atrazina/toxicidad , Atrazina/análisis , Contaminantes del Suelo/análisis , Contaminantes del Suelo/toxicidad , Monitoreo del Ambiente/métodos , Aguas Residuales/química , Prometrina/toxicidad , Dicamba
7.
Artículo en Inglés | MEDLINE | ID: mdl-38928941

RESUMEN

Drugged driving, the act of driving a vehicle under the influence of illicit drugs, by adolescents is a serious public health concern. Many factors contribute to this risk behavior, but much less is known regarding the role of parenting behaviors in this phenomenon. The purpose of this study was to examine specific parenting behaviors and their influence among a nationally representative sample of adolescents. Pooled data from the 2016-2019 National Survey on Drug Use and Health (NSDUH) among 17,520 adolescents ages 16-17 years old were analyzed. Differences were found in specific parenting behaviors and adolescent drugged/drunk driving, with parents not checking homework and not telling their children they are proud of them being the most influential. Findings from the present study may inform drugged driving prevention programs for parents and adolescents and enhance road safety interventions.


Asunto(s)
Conducir bajo la Influencia , Responsabilidad Parental , Humanos , Adolescente , Estados Unidos , Femenino , Masculino , Conducir bajo la Influencia/estadística & datos numéricos , Conducir bajo la Influencia/prevención & control , Conducta del Adolescente/psicología , Conducción de Automóvil/psicología , Asunción de Riesgos , Trastornos Relacionados con Sustancias/psicología , Trastornos Relacionados con Sustancias/epidemiología
8.
J Dairy Sci ; 2024 Jun 06.
Artículo en Inglés | MEDLINE | ID: mdl-38851567

RESUMEN

The aim of this study was to evaluate the effects of different anti-mycotoxin feed additives on the concentration of mycotoxins in milk, urine, and blood plasma of dairy cows fed artificially multi-mycotoxin-contaminated diets. Secondarily, performance, total-tract apparent digestibility of nutrients, and blood parameters were evaluated. Twelve multiparous cows (165 ± 45 d in milk, 557 ± 49 kg body weight, and 32.1 ± 4.57 kg/d milk yield at the start of the experiment) were blocked according to parity, milk yield, and days in milk and used in a 4 × 4 Latin square design experiment with 21-d periods, where the last 7 d were used for sampling and data analysis. Treatments were: 1) Mycotoxin group (MTX), basal diet (BD) without anti-mycotoxin feed additives; 2) Hydrated sodium calcium aluminosilicate (HSCA), HSCA added to the BD at 25g/cow/d; 3) Mycotoxin deactivator 15 (MD15), MD (Mycofix® Plus, dsm-firmenich) added to the BD at 15 g/cow/d; and 4) Mycotoxin deactivator 30 (MD30), MD added to the BD at 30 g/cow/d. Cows from all treatments were challenged with a blend of mycotoxins containing 404 µg aflatoxins B1 (AFB1), 5,025 µg deoxynivalenol (DON), 8,046 µg fumonisins (FUM), 195 µg T2 toxin (T2), and 2,034 µg of zearalenone (ZEN) added daily to the BD during the last 7 d of each period. Neither performance (milk yield and composition) nor nutrient digestibility was affected by treatments. All additives reduced aflatoxin M1 (AFM1) concentration in milk, whereas MD15 and MD30 group had lower excretion of AFM1 in milk than HSCA. DON, FUM, T2, or ZEN were not detected in milk of MD15 and MD30. Concentrations in milk of DON, FUM, T2, and ZEN were similar between MTX and HSCA. Except for AFM1, none of the analyzed mycotoxins were detected in urine of MD30 group. Comparing HSCA to MD treatments, the concentration of AFM1 was greater for HSCA, whereas MD30 was more efficient at reducing AFM1 in urine than MD15. AFM1, DON, FUM, and ZEN were not detected in the plasma of cows fed MD30, and DON was also not detected in MD15 group. Plasma concentration of FUM was lower for MD15, similar plasma FUM concentration was reported for HSCA and MTX. Plasma concentration of ZEN was lower for MD15 than MTX and HSCA. Serum concentrations of haptoglobin and hepatic enzymes were not affected by treatments. Blood concentration of sodium was lower in HSCA compared with MD15 and MD30 groups. In conclusion, the mycotoxin deactivator proved to be effective in reducing the secretion of mycotoxins in milk, urine, and blood plasma, regardless of the dosage. This reduction was achieved without adverse effects on milk production or total-tract digestibility in cows fed multi-mycotoxin-contaminated diets over a short-term period. Greater reductions in mycotoxin secretion were observed with full dose of MD.

9.
Microb Ecol ; 87(1): 88, 2024 Jun 28.
Artículo en Inglés | MEDLINE | ID: mdl-38943017

RESUMEN

Plastic pollution poses a worldwide environmental challenge, affecting wildlife and human health. Assessing the biodegradation capabilities of natural microbiomes in environments contaminated with microplastics is crucial for mitigating the effects of plastic pollution. In this work, we evaluated the potential of landfill leachate (LL) and estuarine sediments (ES) to biodegrade polyethylene (PE), polyethylene terephthalate (PET), and polycaprolactone (PCL), under aerobic, anaerobic, thermophilic, and mesophilic conditions. PCL underwent extensive aerobic biodegradation with LL (99 ± 7%) and ES (78 ± 3%) within 50-60 days. Under anaerobic conditions, LL degraded 87 ± 19% of PCL in 60 days, whereas ES showed minimal biodegradation (3 ± 0.3%). PE and PET showed no notable degradation. Metataxonomics results (16S rRNA sequencing) revealed the presence of highly abundant thermophilic microorganisms assigned to Coprothermobacter sp. (6.8% and 28% relative abundance in anaerobic and aerobic incubations, respectively). Coprothermobacter spp. contain genes encoding two enzymes, an esterase and a thermostable monoacylglycerol lipase, that can potentially catalyze PCL hydrolysis. These results suggest that Coprothermobacter sp. may be pivotal in landfill leachate microbiomes for thermophilic PCL biodegradation across varying conditions. The anaerobic microbial community was dominated by hydrogenotrophic methanogens assigned to Methanothermobacter sp. (21%), pointing at possible syntrophic interactions with Coprothermobacter sp. (a H2-producer) during PCL biodegradation. In the aerobic experiments, fungi dominated the eukaryotic microbial community (e.g., Exophiala (41%), Penicillium (17%), and Mucor (18%)), suggesting that aerobic PCL biodegradation by LL involves collaboration between fungi and bacteria. Our findings bring insights on the microbial communities and microbial interactions mediating plastic biodegradation, offering valuable perspectives for plastic pollution mitigation.


Asunto(s)
Bacterias , Biodegradación Ambiental , Microbiota , Microplásticos , Instalaciones de Eliminación de Residuos , Microplásticos/metabolismo , Bacterias/clasificación , Bacterias/metabolismo , Bacterias/genética , Bacterias/aislamiento & purificación , Contaminantes Químicos del Agua/metabolismo , Poliésteres/metabolismo , Sedimentos Geológicos/microbiología , ARN Ribosómico 16S/genética , Estuarios , Polietileno/metabolismo , Tereftalatos Polietilenos/metabolismo
10.
An Acad Bras Cienc ; 96(2): e20230953, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38747795

RESUMEN

The present work is concerned with the use of a Response Surface Model of the reduced flexibility matrix for structural damage identification. A Response Surface Model (RSM) is fitted with the aim at providing a polynomial relationship between nodal cohesion parameters, used to describe the damage field within the structure, and elements of the reduced flexibility matrix. A design of experiment built on combinations of a relatively small number of nodal cohesion parameters is used to fit the RSM. The damage identification problem is formulated within the Bayesian framework and the Delayed Rejection Adaptive Metropolis method is used to sample the posterior probability density function of the uncertain cohesion parameters. Numerical simulations addressing damage identification in plates were carried out in order to assess the proposed approach, which succeeded in the identification of the different damage profiles considered. Besides, the use of a RSM, instead of a FEM of the structure, resulted in reductions of up almost 78% in the required computational cost.


Asunto(s)
Teorema de Bayes , Simulación por Computador , Modelos Teóricos
11.
Photochem Photobiol Sci ; 23(6): 1167-1178, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38717721

RESUMEN

Temperature up-shift and UV-A radiation effects on growth, lipid damage, fatty acid (FA) composition and expression of desaturase genes desA and desB were investigated in the cyanobacteria Microcystis aeruginosa. Although UV-A damaging effect has been well documented, reports on the interactive effects of UV radiation exposure and warming on cyanobacteria are scarce. Temperature and UV-A doses were selected based on the physiological responses previously obtained by studies with the same M. aeruginosa strain used in this study. Cells pre-grown at 26 °C were incubated at the same temperature or 29 °C and exposed to UV-A + PAR and only PAR for 9 days. Growth rate was significantly affected by UV-A radiation independently of the temperature throughout the experiment. High temperature produced lipid damage significantly higher throughout the experiment, decreasing at day 9 as compared to 26 °C. In addition, the cells grown at 29 °C under UV-A displayed a decrease in polyunsaturated FA (PUFA) levels, with ω3 PUFA being mostly affected at the end of exposure. Previously, we reported that UV-A-induced lipid damage affects differentially ω3 and ω6 PUFAs. We report that UV-A radiation leads to an upregulation of desA, possibly due to lipid damage. In addition, the temperature up-shift upregulates desA and desB regardless of the radiation. The lack of lipid damage for UV-A on ω3 could explain the lack of transcription induction of desB. The significant ω6 decrease at 26 °C in cells exposed to UV-A could be due to the lack of upregulation of desA.


Asunto(s)
Ácido Graso Desaturasas , Ácidos Grasos , Microcystis , Temperatura , Rayos Ultravioleta , Microcystis/efectos de la radiación , Ácidos Grasos/metabolismo , Ácido Graso Desaturasas/metabolismo , Ácido Graso Desaturasas/genética , Aclimatación , Estrés Fisiológico
12.
Am J Dent ; 37(2): 101-105, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38704853

RESUMEN

PURPOSE: To evaluate the effect of toothbrushing with conventional and whitening dentifrices on the color difference (ΔE00), gloss (Δgloss), and surface roughness (SR) of stained stabilized zirconia with 5 mol% of yttrium oxide (5Y-TZP) after polishing or glazing. METHODS: Specimens were divided into four groups (n=20): C (control), S (staining), SG (staining and glazing) and SP (staining and polishing). 50,000 toothbrushing cycles were performed with conventional (n=10) and whitening (n= 10) dentifrice slurries. The ΔE00 and Δgloss were measured using a spectrophotometer and CIEDE2000 system while SR was measured by laser confocal microscope. The ΔE00 and Δgloss data were analyzed using 2-way ANOVA, and SR data were analyzed using the linear repeated measures model, with Bonferroni's complementary test (α= 0.05). RESULTS: The ΔE00 values were beyond the acceptability threshold and no differences were found among the groups. There was no difference among groups to Δgloss after toothbrushing with conventional dentifrice while SP presented the highest values of Δgloss after toothbrushing with whitening dentifrice. Conventional dentifrice decreased the SR of stained groups and whitening dentifrice decreased SR of S and SG. The toothbrushing with conventional and whitening dentifrices promoted color difference, but did not impair gloss and surface roughness of stained 5Y-TZP. CLINICAL SIGNIFICANCE: Monolithic zirconia has been routinely used for esthetic restorations, however the type of finishing procedures that is carried out on it must be taken into consideration, in addition to the fact that brushing can influence the color difference of the material as well as interfere with surface roughness and gloss.


Asunto(s)
Dentífricos , Propiedades de Superficie , Cepillado Dental , Circonio , Circonio/química , Dentífricos/uso terapéutico , Color , Blanqueadores Dentales/uso terapéutico , Pulido Dental/métodos , Itrio/química , Humanos , Ensayo de Materiales , Blanqueamiento de Dientes/métodos , Espectrofotometría , Microscopía Confocal
13.
Rev Invest Clin ; 76(1): 37-44, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38442374

RESUMEN

Background: Osteoarthritis is a frequent rheumatic disease. Some single-nucleotide polymorphisms of the gene associated with fat mass and obesity are associated with increased body mass index and knee osteoarthritis. Objective: The objective of this study was to analyze the association of single nucleotide polymorphism rs1477196 of the fat mass and obesity gene with primary knee osteoarthritis. Methods: This observational and cross-sectional study included 347 Mexican participants. We performed the genotypification analysis with TaqMan® probe C_2031262_10 for rs1477196 (Thermo Fisher Scientific). Multivariate analysis included covariables such as age, type 2 diabetes, obesity, and postmenopause. Results: Type 2 diabetes, obesity, and postmenopause were associated with primary knee osteoarthritis in female participants. We did not find an association between rs1477196 and obesity. In the codominant and dominant genetic models, rs1477196 was significantly associated with primary knee osteoarthritis only in the female group, including in the model adjusted by other covariables (odds ratio = 2.517; 1.035-6.123; p = 0.042 and odds ratio = 2.387; 1.054-5.407; p = 0.037, respectively). The interaction between rs1477196 and obesity was significantly associated with primary knee osteoarthritis in female participants (p = 0.039 and p = 0.043). Conclusions: Our findings suggest that the rs1477196 variant of the fat and obesity mass gene may be associated with the risk of primary knee osteoarthritis in women.


Asunto(s)
Dioxigenasa FTO Dependiente de Alfa-Cetoglutarato , Diabetes Mellitus Tipo 2 , Osteoartritis de la Rodilla , Femenino , Humanos , Dioxigenasa FTO Dependiente de Alfa-Cetoglutarato/genética , Estudios Transversales , México , Obesidad/epidemiología , Obesidad/genética , Osteoartritis de la Rodilla/epidemiología , Osteoartritis de la Rodilla/genética , Polimorfismo de Nucleótido Simple
14.
Rev. invest. clín ; 76(1): 37-44, Jan.-Feb. 2024. tab
Artículo en Inglés | LILACS-Express | LILACS | ID: biblio-1560127

RESUMEN

ABSTRACT Background: Osteoarthritis is a frequent rheumatic disease. Some single-nucleotide polymorphisms of the gene associated with fat mass and obesity are associated with increased body mass index and knee osteoarthritis. Objective: The objective of this study was to analyze the association of single nucleotide polymorphism rs1477196 of the fat mass and obesity gene with primary knee osteoarthritis. Methods: This observational and cross-sectional study included 347 Mexican participants. We performed the genotypification analysis with TaqMan® probe C_2031262_10 for rs1477196 (Thermo Fisher Scientific). Multivariate analysis included covariables such as age, type 2 diabetes, obesity, and postmenopause. Results: Type 2 diabetes, obesity, and postmenopause were associated with primary knee osteoarthritis in female participants. We did not find an association between rs1477196 and obesity. In the codominant and dominant genetic models, rs1477196 was significantly associated with primary knee osteoarthritis only in the female group, including in the model adjusted by other covariables (odds ratio = 2.517; 1.035-6.123; p = 0.042 and odds ratio = 2.387; 1.054-5.407; p = 0.037, respectively). The interaction between rs1477196 and obesity was significantly associated with primary knee osteoarthritis in female participants (p = 0.039 and p = 0.043). Conclusions: Our findings suggest that the rs1477196 variant of the fat and obesity mass gene may be associated with the risk of primary knee osteoarthritis in women.

15.
J Arthroplasty ; 39(8S1): S2-S8, 2024 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-38401619

RESUMEN

BACKGROUND: Chronic periprosthetic joint infection (PJI) is a major complication of total joint arthroplasty. The underlying pathogenesis often involves the formation of bacterial biofilm that protects the pathogen from both host immune responses and antibiotics. The gold standard treatment requires implant removal, a procedure that carries associated morbidity and mortality risks. Strategies to preserve the implant while treating PJI are desperately needed. Our group has developed an anti-biofilm treatment, PhotothermAA gel, which has shown complete eradication of 2-week-old mature biofilm in vitro. In this study, we tested the anti-biofilm efficacy and safety of PhotothermAA in vivo when combined with debridement, antibiotics and implant retention (DAIR) in a rabbit model of knee PJI. METHODS: New Zealand white rabbits (n = 21) underwent knee joint arthrotomy, titanium tibial implant insertion, and inoculation with Xen36 (bioluminescent Staphylococcus aureus) after capsule closure. At 2 weeks, rabbits underwent sham surgery (n = 6), DAIR (n = 6), or PhotothermAA with DAIR (n = 9) and were sacrificed 2 weeks later to measure implant biofilm burden, soft-tissue infection, and tissue necrosis. RESULTS: The combination of anti-biofilm PhotothermAA with DAIR significantly decreased implant biofilm coverage via scanning electron microscopy compared to DAIR alone (1.8 versus 81.0%; P < .0001). Periprosthetic soft-tissue cultures were significantly decreased in the PhotothermAA with DAIR treatment group (log reduction: Sham 1.6, DAIR 2.0, combination 5.6; P < .0001). Treatment-associated necrosis was absent via gross histology of tissue adjacent to the treatment area (P = .715). CONCLUSIONS: The addition of an anti-biofilm solution like PhotothermAA as a supplement to current treatments that allow implant retention may prove useful in PJI treatment.


Asunto(s)
Antibacterianos , Artroplastia de Reemplazo de Rodilla , Biopelículas , Desbridamiento , Modelos Animales de Enfermedad , Prótesis de la Rodilla , Infecciones Relacionadas con Prótesis , Infecciones Estafilocócicas , Animales , Conejos , Biopelículas/efectos de los fármacos , Infecciones Relacionadas con Prótesis/microbiología , Infecciones Relacionadas con Prótesis/prevención & control , Desbridamiento/métodos , Antibacterianos/uso terapéutico , Infecciones Estafilocócicas/prevención & control , Prótesis de la Rodilla/efectos adversos , Prótesis de la Rodilla/microbiología , Artroplastia de Reemplazo de Rodilla/efectos adversos , Distinciones y Premios , Staphylococcus aureus/efectos de los fármacos , Staphylococcus aureus/fisiología , Articulación de la Rodilla/cirugía , Articulación de la Rodilla/microbiología , Terapia Combinada , Retención de la Prótesis , Geles
16.
JHEP Rep ; 6(2): 100984, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38293685

RESUMEN

Background & Aims: Lipid droplet (LD) accumulation in cells and tissues is understood to be an evolutionarily conserved tissue tolerance mechanism to prevent lipotoxicity caused by excess lipids; however, the presence of excess LDs has been associated with numerous diseases. Sepsis triggers the reprogramming of lipid metabolism and LD accumulation in cells and tissues, including the liver. The functions and consequences of sepsis-triggered liver LD accumulation are not well known. Methods: Experimental sepsis was induced by CLP (caecal ligation and puncture) in mice. Markers of hepatic steatosis, liver injury, hepatic oxidative stress, and inflammation were analysed using a combination of functional, imaging, lipidomic, protein expression and immune-enzymatic assays. To prevent LD formation, mice were treated orally with A922500, a pharmacological inhibitor of DGAT1. Results: We identified that liver LD overload correlates with liver injury and sepsis severity. Moreover, the progression of steatosis from 24 h to 48 h post-CLP occurs in parallel with increased cytokine expression, inflammatory cell recruitment and oxidative stress. Lipidomic analysis of purified LDs demonstrated that sepsis leads LDs to harbour increased amounts of unsaturated fatty acids, mostly 18:1 and 18:2. An increased content of lipoperoxides within LDs was also observed. Conversely, the impairment of LD formation by inhibition of the DGAT1 enzyme reduces levels of hepatic inflammation and lipid peroxidation markers and ameliorates sepsis-induced liver injury. Conclusions: Our results indicate that sepsis triggers lipid metabolism alterations that culminate in increased liver LD accumulation. Increased LDs are associated with disease severity and liver injury. Moreover, inhibition of LD accumulation decreased the production of inflammatory mediators and lipid peroxidation while improving tissue function, suggesting that LDs contribute to the pathogenesis of liver injury triggered by sepsis. Impact and Implications: Sepsis is a complex life-threatening syndrome caused by dysregulated inflammatory and metabolic host responses to infection. The observation that lipid droplets may contribute to sepsis-associated organ injury by amplifying lipid peroxidation and inflammation provides a rationale for therapeutically targeting lipid droplets and lipid metabolism in sepsis.

17.
Am J Public Health ; 114(S1): S112-S123, 2024 01.
Artículo en Inglés | MEDLINE | ID: mdl-38207271

RESUMEN

Objectives. To provide initial findings from Community Engagement Alliance (CEAL), a multistate effort funded by the National Institutes of Health, to conduct urgent community-engaged research and outreach focused on COVID-19 awareness, education, and evidence-based response. Methods. We collected survey data (November 2020-November 2022) from 21 CEAL teams from 29 state and regional CEAL sites spanning 19 US states, the District of Columbia, and Puerto Rico, which covered priority populations served and trusted sources of information about COVID-19, including prevention behaviors, vaccination, and clinical trials. Results. A disproportionate number of respondents were Latino (45%) or Black (40%). There was considerable variability between CEAL sites regarding trusted sources of information, COVID-19 prevention, and COVID-19 vaccination. For example, more respondents (70%) reported health care providers as a trusted source of COVID-19 information than any other source (ranging from 6% to 87% by site). Conclusions. CEAL rapidly developed novel infrastructure to engage academic, public health, and community organizations to address COVID-19's impacts on underserved communities. CEAL provides an example of how to respond in future public health emergencies to quickly promote trustworthy, evidence-based information in ways that advance health equity. (Am J Public Health. 2024;114(S1):S112-S123. https://doi.org/10.2105/AJPH.2023.307504).


Asunto(s)
COVID-19 , Confianza , Estados Unidos/epidemiología , Humanos , Vacunas contra la COVID-19 , COVID-19/epidemiología , COVID-19/prevención & control , Puerto Rico , Percepción
18.
J Rural Health ; 40(2): 219-226, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-37715718

RESUMEN

PURPOSE: The rise in rural hospital closures has sparked concern about the potential loss of essential health care services for rural communities. It is crucial to incorporate the perspectives of community residents, which have been largely missing from the literature, when devising strategies to improve health care for this population. The purpose of this study was to describe community residents' perceptions of access to care following a rural hospital closure in an economically distressed Appalachian county of Tennessee. METHODS: This study used a qualitative descriptive approach to illustrate how community residents perceive accessing care post hospital closure. We conducted semi-structured interviews with 24 community residents via telephone in May through August of 2020. Interviews were analyzed using conventional content analysis. FINDINGS: Five themes were identified based on Penchansky and Thomas' framework of health care: accessibility, availability, affordability, accommodation, and acceptability. Accessibility was identified as the most common concern among participants. Specifically, participants perceived longer travel times to receive care, reduced availability of emergency and specialty care, increased costs associated with ambulance services, and extended wait times to see providers. CONCLUSIONS: Our findings provide a critical perspective to inform local leaders and policymakers on the impacts of a hospital closure in a rural community. As rural hospitals continue to close, it is crucial to develop multi-level, community-driven solutions to ensure access to care for rural communities.


Asunto(s)
Clausura de las Instituciones de Salud , Accesibilidad a los Servicios de Salud , Humanos , Población Rural , Tennessee , Hospitales Rurales
19.
J Agromedicine ; 29(2): 235-245, 2024 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-38100079

RESUMEN

Researchers and epidemiologists are working to improve the capture of agriculture, forestry, and fishing (AgFF) injuries in a variety of ways. A critical component of any surveillance system is the dissemination of information. The purpose of this paper is to report on a survey conducted with AgFF injury surveillance stakeholders to understand preferred dissemination strategies. The survey was distributed using REDCap via web link to organizational stakeholders, which included advisory board members, safety trainers, industry managers and workers, and research collaborators. In total, there were 75 respondents (21% response rate). Occupation and industry influenced preference in update methods. Regarding the length and breadth of updates, 63% of respondents prefer reports (one to five pages), followed by 57% desiring a summary (less than one page), while only 24% wanted a detailed analysis. Social media and news preferences were also different among stakeholders. Surveillance data were desired for 1) trend analysis, 2) tailoring activities and solutions for education, training, outreach and interventions and 3) for research purposes such as grant proposals and evaluation. The dissemination of injury surveillance data should be tailored to the intended audience. Greater attention needs to be paid to the ways in which we share our findings.


Asunto(s)
Agricultura Forestal , Traumatismos Ocupacionales , Humanos , Traumatismos Ocupacionales/epidemiología , Caza , Encuestas y Cuestionarios , Agricultura
20.
AIDS ; 38(1): 105-113, 2024 01 01.
Artículo en Inglés | MEDLINE | ID: mdl-37812389

RESUMEN

OBJECTIVES: This study aimed to analyze characteristics of mpox hospitalization in a Brazilian cohort, further exploring the impact of HIV on mpox-related outcomes and hospitalization. DESIGN: We conducted a descriptive analysis, comparing characteristics of individuals diagnosed with mpox according to hospitalization and HIV status, and described the mpox cases among those living with HIV. METHODS: This was a single-center, prospective cohort study conducted at a major infectious diseases referral center in Rio de Janeiro, Brazil, that enrolled participants older than 18 years of age diagnosed with mpox. Information was collected on standardized forms, including data on sociodemographic, behavioral, clinical and laboratory characteristics. For comparisons, we used chi-squared, Fisher's exact and the Moods median tests whenever appropriate. RESULTS: From June to December, 2022, we enrolled 418 individuals diagnosed with mpox, of whom 52% were people with HIV (PWH). PWH presented more frequently with fever, anogenital lesions and proctitis. The overall hospitalization rate was 10.5% ( n  = 43), especially for pain control. Among hospitalized participants, PWH had more proctitis and required invasive support. Mpox severity was related to poor HIV continuum of care outcomes and low CD4 + cell counts. All deaths ( n  = 2) occurred in PWH with CD4 + less than 50 cells/µl. CONCLUSION: HIV-related immunosuppression likely impacts mpox clinical outcomes. This is of special concern in settings of poor adherence and late presentation to care related to socioeconomic inequalities, such as Brazil. The HIV continuum of care must be taken into account when responding to the mpox outbreak.


Asunto(s)
Infecciones por VIH , Mpox , Proctitis , Humanos , Brasil/epidemiología , Estudios Prospectivos , Infecciones por VIH/complicaciones , Terapia de Inmunosupresión , Hospitalización
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