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1.
Nature ; 630(8018): 912-919, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38867041

RESUMEN

The ancient city of Chichén Itzá in Yucatán, Mexico, was one of the largest and most influential Maya settlements during the Late and Terminal Classic periods (AD 600-1000) and it remains one of the most intensively studied archaeological sites in Mesoamerica1-4. However, many questions about the social and cultural use of its ceremonial spaces, as well as its population's genetic ties to other Mesoamerican groups, remain unanswered2. Here we present genome-wide data obtained from 64 subadult individuals dating to around AD 500-900 that were found in a subterranean mass burial near the Sacred Cenote (sinkhole) in the ceremonial centre of Chichén Itzá. Genetic analyses showed that all analysed individuals were male and several individuals were closely related, including two pairs of monozygotic twins. Twins feature prominently in Mayan and broader Mesoamerican mythology, where they embody qualities of duality among deities and heroes5, but until now they had not been identified in ancient Mayan mortuary contexts. Genetic comparison to present-day people in the region shows genetic continuity with the ancient inhabitants of Chichén Itzá, except at certain genetic loci related to human immunity, including the human leukocyte antigen complex, suggesting signals of adaptation due to infectious diseases introduced to the region during the colonial period.


Asunto(s)
Conducta Ceremonial , ADN Antiguo , Genoma Humano , Humanos , México , Genoma Humano/genética , Masculino , ADN Antiguo/análisis , Historia Antigua , Femenino , Entierro/historia , Arqueología , Gemelos/genética , Historia Medieval
3.
Plants (Basel) ; 13(12)2024 Jun 17.
Artículo en Inglés | MEDLINE | ID: mdl-38931103

RESUMEN

Staphylococcus aureus is a Gram-positive bacteria with the greatest impact in the clinical area, due to the high rate of infections and deaths reaching every year. A previous scenario is associated with the bacteria's ability to develop resistance against conventional antibiotic therapies as well as biofilm formation. The above situation exhibits the necessity to reach new effective strategies against this pathogen. Flourensia retinophylla is a medicinal plant commonly used for bacterial infections treatments and has demonstrated antimicrobial effect, although its effect against S. aureus and bacterial biofilms has not been investigated. The purpose of this work was to analyze the antimicrobial and antibiofilm potential of F. retinophylla against S. aureus. The antimicrobial effect was determined using an ethanolic extract of F. retinophylla. The surface charge of the bacterial membrane, the K+ leakage and the effect on motility were determined. The ability to prevent and remove bacterial biofilms was analyzed in terms of bacterial biomass, metabolic activity and viability. The results showed that F. retinophylla presents inhibitory (MIC: 250 µg/mL) and bactericidal (MBC: 500 µg/mL) activity against S. aureus. The MIC extract increased the bacterial surface charge by 1.4 times and the K+ concentration in the extracellular medium by 60%. The MIC extract inhibited the motility process by 100%, 61% and 40% after 24, 48 and 72 h, respectively. The MIC extract prevented the formation of biofilms by more than 80% in terms of biomass production and metabolic activity. An extract at 10 × MIC reduced the metabolic activity by 82% and the viability by ≈50% in preformed biofilms. The results suggest that F. retinophylla affects S. areus membrane and the process of biofilm formation and removal. This effect could set a precedent to use this plant as alternative for antimicrobial and disinfectant therapies to control infections caused by this pathogen. In addition, this shrub could be considered for carrying out a purification process in order to identify the compounds responsible for the antimicrobial and antibiofilm effect.

4.
Artículo en Inglés | MEDLINE | ID: mdl-38743471

RESUMEN

Rhizobia are bacteria that form nitrogen-fixing nodules in legume plants. The sets of genes responsible for both nodulation and nitrogen fixation are carried in plasmids or genomic islands that are often mobile. Different strains within a species sometimes have different host specificities, while very similar symbiosis genes may be found in strains of different species. These specificity variants are known as symbiovars, and many of them have been given names, but there are no established guidelines for defining or naming them. Here, we discuss the requirements for guidelines to describe symbiovars, propose a set of guidelines, provide a list of all symbiovars for which descriptions have been published so far, and offer a mechanism to maintain a list in the future.


Asunto(s)
Rhizobium , Simbiosis , Rhizobium/genética , Rhizobium/clasificación , Fabaceae/microbiología , Fijación del Nitrógeno , Nódulos de las Raíces de las Plantas/microbiología , Guías como Asunto
5.
Int Immunopharmacol ; 135: 112292, 2024 Jun 30.
Artículo en Inglés | MEDLINE | ID: mdl-38788446

RESUMEN

Inflammatory conditions are among the principal causes of morbidity worldwide, and their treatment continues to be a challenge, given the restricted availability of effective and safe drugs. Thus, the identification of new compounds with biological activity that can be used for the treatment of inflammatory disorders is an essential field in medical and health research, in order to improve the health and quality of life of patients suffering from these diseases. Evaluation of the anti-inflammatory activity of drugs requires the implementation of models that accurately depict the biochemical and/or physiological responses that characterize human inflammation; for this reason, several in vitro and in vivo models have been developed, providing a platform for discovering novel or repurposed compounds. For this reason, in the present review we have selected twelve commonly used models for the evaluation of the anti-inflammatory effect, and extensively describes the difference between in vivo and in vitro models of inflammation, highlighting their advantages and limitations. On the other hand, the inflammatory mechanisms involved in them, the methods employed for their establishment, and the different parameters assessed to determine the anti-inflammatory activity of a given compound are extensively discussed. We expect to provide a comprehensive guide for the improved selection of a suitable model for the preclinical evaluation of plausible anti-inflammatory agents.


Asunto(s)
Antiinflamatorios , Modelos Animales de Enfermedad , Inflamación , Animales , Humanos , Inflamación/tratamiento farmacológico , Antiinflamatorios/uso terapéutico , Antiinflamatorios/farmacología , Enfermedad Crónica , Enfermedad Aguda , Evaluación Preclínica de Medicamentos
6.
Plants (Basel) ; 13(6)2024 Mar 11.
Artículo en Inglés | MEDLINE | ID: mdl-38592789

RESUMEN

Medicinal plants have been a traditional remedy for numerous ailments for centuries. However, their usage is limited due to a lack of evidence-based studies elucidating their mechanisms of action. In some countries, they are still considered the first treatment due to their low cost, accessibility, and minor adverse effects. Mexico is in second place, after China, in inventoried plants for medicinal use. It has around 4000 species of medicinal plants; however, pharmacological studies have only been carried out in 5% of its entirety. The species of the Mexican arid zones, particularly in semi-desert areas, exhibit outstanding characteristics, as their adverse growing conditions (e.g., low rainfall and high temperatures) prompt these plants to produce interesting metabolites with diverse biological activities. This review explores medicinal plants belonging to the arid and semi-arid zones of Mexico, focusing on those that have stood out for their bioactive potential, such as Jatropha dioica, Turnera diffusa, Larrea tridentata, Opuntia ficus-indica, Flourensia cernua, Fouquieria splendes, and Prosopis glandulosa. Their extraction conditions, bioactive compounds, mechanisms of action, and biological efficacy are presented, with emphasis on their role in the treatment of respiratory diseases. Additionally, current research, novel applications, and perspectives concerning medicinal plants from these zones are also discussed.

7.
Polymers (Basel) ; 16(7)2024 Mar 30.
Artículo en Inglés | MEDLINE | ID: mdl-38611209

RESUMEN

Expanded polystyrene will account for 5.3% of total global plastic production in 2021 and is widely used for food packaging due to its excellent moisture resistance and thermal insulation. However, some of these packages are often used only once before being discarded, generating large amounts of environmentally harmful plastic waste. A very attractive alternative to the conventional methods used for polymer processing is the use of supercritical carbon dioxide (scCO2) since it has mass-transfer properties adapted to the foam morphology, generating different path lengths for the diffusion of active compounds within its structure and can dissolve a wide range of organic molecules under supercritical conditions. The objective of this research was to evaluate the effect of operational variables on the process of caffeic acid (CA) impregnation and subsequent foaming of polylactic acid (PLA) as well as two PLA/poly(butylene-co-terephthalate-adipate) (PBAT) blends using scCO2. The results showed an increase in the degree of crystallinity of the CA-impregnated samples due to the nucleation effect of the active compound. On the other hand, SEM micrographs of both films and foams showed significant differences due to the presence of PBAT and its low miscibility with PLA. Finally, the results obtained in this work contribute to the knowledge of the important parameters to consider for the implementation of the impregnation and foaming process of PLA and PLA/PBAT blends with potential use in food packaging.

8.
Polymers (Basel) ; 16(6)2024 Mar 13.
Artículo en Inglés | MEDLINE | ID: mdl-38543404

RESUMEN

In the last decade, among the emerging technologies in the area of bioplastics, additive manufacturing (AM), commonly referred to as 3D printing, stands out. This technology has gained great interest in the development of new products, mainly due to its capability to easily produce customized and low-cost plastic products. This work aims to evaluate the effect of supercritical foaming of 3D-printed parts based on a commercial PLA matrix loaded with calcium carbonate, for single-use sustainable food contact materials. 3D-printed PLA/CaCO3 parts were obtained by 3D printing with a 20% and 80% infill, and two infill patterns, rectilinear and triangular, were set for each of the infill percentages selected. Supercritical fluid foaming of PLA/CaCO3 composite printed parts was performed using a pressure of 25 MPa, a temperature of 130 °C for 23 min, with a fast depressurization rate (1 s). Closed-cell foams were achieved and the presence of CaCO3 did not influence the surface of the foams or the cell walls, and no agglomerations were observed. Foam samples with 80% infill showed subtle temperature fluctuations, and thermogravimetric analysis showed that samples were thermally stable up to ~300 °C, while the maximum degradation temperature was around 365 °C. Finally, tensile test analysis showed that for lower infill contents, the foams showed lower mechanical performance, while the 80% infill and triangular pattern produced foams with good mechanical performance. These results emphasize the interest in using the supercritical CO2 process to easily produce foams from 3D-printed parts. These materials represent a sustainable alternative for replacing non-biodegradable materials such as Expanded Polystyrene, and they are a promising option for use in many industrial applications, such as contact materials.

9.
J Adolesc Health ; 74(5): 1019-1025, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38323966

RESUMEN

PURPOSE: Integrating digital technologies into sexual health education can offer advantages for connecting with adolescents, particularly populations who may be underserved through common school-based approaches. This study assessed the effectiveness of In the Know, an in-person, group-based sexual health education program integrating digital technologies, codesigned with adolescents. METHODS: The study design was a cluster randomized trial with 1,263 adolescents aged 13-19 in 95 cohorts, implemented in community-based organizations and schools throughout Fresno County, California. Participants completed a baseline survey and a follow-up survey 3 months later. Two-level mixed-effects regression models with random intercepts for cohort were used to estimate the intervention's impact on unprotected sex, use of clinical health services, knowledge of local sexual health services, technology use to find or schedule services, and sexual health knowledge at the 3-month follow-up. RESULTS: The average age of participants was 15.7 years, and the majority identified as Hispanic (71%). In adjusted analyses, intervention group participants were more likely to use clinical services (42.7% vs. 33.2%, p = .009) and reported greater sexual health knowledge at 3 months (57.6% of items answered correctly vs. 50.7%, p = .001). No significant differences were observed in the other outcomes by study group. DISCUSSION: In the Know participants demonstrated greater use of clinical health services and sexual health knowledge at 3 months. The study findings show the potential for incorporating user-centered design and technology into sexual health education to better support adolescents who may have limited access to this important information.


Asunto(s)
Tecnología Digital , Educación Sexual , Adolescente , Humanos , Hispánicos o Latinos , Instituciones Académicas , Conducta Sexual , Adulto Joven
10.
Methods Mol Biol ; 2751: 47-68, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38265709

RESUMEN

The most important advances in our understanding of the viral life cycle, such as genome replication, packaging, transmission, and host interactions, have been made via the development of viral infectious full-length clones. Here, we describe the detailed protocols for the construction of an infectious clone derived from Botrytis virus F (BVF), a mycoflexivirus infecting the plant pathogenic fungus Botrytis cinerea, the determination of the complete sequence of the cloned mycovirus, the preparation of fungal protoplasts, and the transfection of protoplasts using transcripts derived from the BVF infectious clone.


Asunto(s)
Enfermedades Transmisibles , Virus Fúngicos , Botrytis , Genética Inversa
11.
Health Promot Pract ; 25(4): 698-706, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38180021

RESUMEN

Ongoing education on sexual health and other health promotion topics is critical as young people transition into adulthood. A "booster" round of education may be an effective strategy to reinforce information previously taught and expand to additional topics relevant later in adolescence. In partnership with a Youth Advisory Council, we co-designed READY, Set, Go!, a booster curriculum for older adolescents with modules covering adult preparation skills, sexual identity, relationships, reproductive health, and mental health. From November 2021 to January 2023, we provided the curriculum to 21 cohorts of 12th grade students (N = 433) in rural communities of Fresno County, CA, and conducted an implementation evaluation to assess its feasibility in school settings, acceptability by participants, and changes in short-term outcomes. Health educators completed implementation logs to track program adaptations. Youth completed pretest/posttest surveys to assess changes in outcomes and participant satisfaction. We used descriptive statistics to examine program adaptations and satisfaction. We used multivariable regression models to examine changes in outcomes, adjusted for sociodemographic characteristics. Health educators completed most activities as planned, with adaptations occurring in response to youth needs and scheduling limitations. Sexual health knowledge, confidence in adult preparation skills, awareness of local sexual and mental health services, and willingness to seek health services all increased significantly from pretest to posttest. Youth feedback was strongly positive. We conclude that booster sexual health education is a promising strategy to address critical knowledge gaps and support health promotion, especially in rural and other under-resourced communities.


Asunto(s)
Curriculum , Población Rural , Educación Sexual , Salud Sexual , Humanos , Adolescente , Femenino , Masculino , Educación Sexual/organización & administración , Salud Sexual/educación , Promoción de la Salud/organización & administración , Promoción de la Salud/métodos , Conocimientos, Actitudes y Práctica en Salud
12.
Parasite Immunol ; 46(1): e13020, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-38275198

RESUMEN

Tritrichomonas foetus is a protozoan parasite that causes a venereal disease in cattle limiting reproduction by abortions and sterility. The immune response against this parasite is poorly understood. Since the iron and calcium ions are important regulators of the microenvironment of the urogenital tract in cattle, we decided to evaluate the role of these divalent cations on the antigenicity of membrane proteins of T. foetus on macrophage activation as one of the first inflammatory responses towards this pathogen. Colorimetric methods and ELISA were used to detect the nitric oxide and oxygen peroxide production and expression of cytokines in culture supernatant from macrophage incubated with membrane proteins from T. foetus cultured in iron- and calcium-rich conditions. qRT-PCR assays were used to evaluate the transcript expression of genes involved in the inflammatory response on the macrophages. The membrane proteins used for in vitro stimulation caused the up-regulation of the iNOS and NOX-2 genes as well as the generation of NO and H2 O2 in murine macrophages on a dependent way of the metal concentrations. Additionally, after stimulation, macrophages showed a considerable rise in pro-inflammatory cytokines and a downregulation of anti-inflammatory cytokines, as well as up-regulation in the transcription of the TLR4 and MyD88 genes. These data suggest that membrane proteins of T. foetus induced by iron and calcium can activate an inflammatory specific macrophage response via TLR4/MyD88 signalling pathway.


Asunto(s)
Enfermedades de los Bovinos , Tritrichomonas foetus , Animales , Bovinos , Femenino , Ratones , Embarazo , Calcio/metabolismo , Enfermedades de los Bovinos/parasitología , Citocinas/metabolismo , Hierro/metabolismo , Macrófagos , Proteínas de la Membrana/metabolismo , Factor 88 de Diferenciación Mieloide , Receptor Toll-Like 4 , Tritrichomonas foetus/genética , Tritrichomonas foetus/metabolismo
13.
J Eukaryot Microbiol ; 71(1): e13000, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-37667470

RESUMEN

Tritrichomonas foetus is a flagellated parasite that primarily infects the reproductive tissues of livestock, causing bovine trichomoniasis. The cytoplasmic membrane of T. foetus contains various compounds that contribute to adherence, colonization, and pathogenicity. Metronidazole (MTZ) is the main treatment for trichomoniasis, but the emergence of drug-resistant strains is a concern due to improper use and dosing. T. foetus infection induces inflammation, and macrophages are key players in the immune response. However, our understanding of the host's immune response to T. foetus is limited, and the specific mechanisms underlying these responses are not well understood. This study aimed to investigate the impact of T. foetus surface proteins from trophozoites cultured under different sublethal MTZ conditions (MTZ-treated T. foetus MPs) on macrophage activation. By analyzing cytokine levels and gene expression in murine macrophages, we demonstrated that MTZ-treated T. foetus MPs induce a specific proinflammatory response. MTZ-treated T. foetus MPs-exposed macrophages exhibited a higher NO and H2 O2 production and overexpression of iNOS and NOX-2 genes in comparison to untreated T. foetus. Additionally, MTZ-treated T. foetus MPs triggered a significant induction of the proinflammatory cytokines IL-1ß, IL-6, TNF-α, and IFN-γ, as well as the overexpression of the TLR4, MyD88, and NF-κB genes on murine macrophages. The study aimed to unravel the immunological response and potential proinflammatory pathways involved in T. foetus infection and MTZ stress. Understanding the immune responses and mechanisms through which T. foetus surface proteins activate macrophages can contribute to the development of new therapeutic strategies for controlling bovine trichomoniasis.


Asunto(s)
Tricomoniasis , Tritrichomonas foetus , Animales , Bovinos , Ratones , Metronidazol/farmacología , Citocinas , Macrófagos , Proteínas de la Membrana
14.
Int J Biol Macromol ; 254(Pt 2): 127793, 2024 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-37926308

RESUMEN

Compounds derived from essential oils have been used in active packaging, but their volatility and degradability negatively affect stability and leads to high release rates. The present study aimed to develop PLA bionanocomposite foams loaded with carvacrol cocrystal by supercritical CO2 and its release into a food simulant for control release in food packaging. For this purpose, 4,4'-bipyridine was used as coformer and carvacrol as active agent. Cocrystallized closed cell foams were obtained using supercritical CO2 and were characterized in terms of their physicochemical and mechanical properties, and release kinetics to a D1 simulant were evaluated as well as the antioxidant ability. A better overall mechanical behavior due to the nanoclay promoting a higher interfacial adhesion with the polymeric matrix was revealed. A higher incorporation of carvacrol was observed in samples with higher C30B content. The incorporated cocrystals showed a decrease of one order of magnitude in the estimated effective diffusion coefficient of carvacrol and showed antioxidant activity. These results suggest that the nanocomposite foam containing carvacrol-based cocrystals could be used in active packaging systems with controlled release characteristics, especially with highly volatile compounds, and can be proposed for other fields such as biomedical applications.


Asunto(s)
Embalaje de Alimentos , Nanocompuestos , Embalaje de Alimentos/métodos , Dióxido de Carbono/química , Preparaciones de Acción Retardada , Poliésteres/química , Antioxidantes/farmacología , Antioxidantes/química
15.
Methods Mol Biol ; 2732: 83-101, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38060119

RESUMEN

Next-generation sequencing (NGS) of total RNA has allowed the detection of novel viruses infecting different hosts, such as fungi, increasing our knowledge on virus horizontal transfer events among different hosts, virus diversity, and virus evolution. Here, we describe the detailed protocols for the isolation of the plant pathogenic fungus Botrytis cinerea, from grapevine plants showing symptoms of the mold gray disease, the culture and maintenance of the isolated B. cinerea strains, the extraction of total RNA from B. cinerea strains for NGS, the bioinformatics pipeline designed and followed to detect mycoviruses in the sequenced samples, and the validation of the in silico detected mycoviruses by different approaches.


Asunto(s)
Hongos , Plantas , Hongos/genética , Plantas/genética , Secuencia de Bases , ARN , Botrytis/genética , Enfermedades de las Plantas/microbiología
16.
Antibiotics (Basel) ; 12(11)2023 Nov 09.
Artículo en Inglés | MEDLINE | ID: mdl-37998810

RESUMEN

Citral is a monoterpene constituted by two isomers known as neral and geranial. It is present in different plant sources and recognized as safe (GRAS) by the Food and Drug Administration (FDA). In recent years, investigations have demonstrated that this compound exhibited several biological activities, such as antibacterial, antifungal, antibiofilm, antiparasitic, antiproliferative, anti-inflammatory, and antioxidant properties, by in vitro and in vivo assays. Additionally, when incorporated into different food matrices, citral can reduce the microbial load of pathogenic microorganisms and extend the shelf life. This compound has acceptable drug-likeness properties and does not present any violations of Lipinski's rules, which could be used for drug development. The above shows that citral could be a compound of interest for developing food additives to extend the shelf life of animal and vegetable origin foods and develop pharmaceutical products.

17.
Cien Saude Colet ; 28(10): 3003-3013, 2023 Oct.
Artículo en Español, Inglés | MEDLINE | ID: mdl-37878941

RESUMEN

The Mexican government implemented a strategy to increase nursing staff in response to COVID-19, including the early graduation of university students, to incorporate them into the care frontline. This exploratory qualitative study aimed to analyze nursing students' experiences recruited by health institutions to care for COVID patients. It included 12 participants who received and accepted job proposals in health institutions for patient care during their internship. Data were collected through semi-structured interviews with prior informed consent. The experiences of the participants were integrated into three themes: the students took advantage of the modified social service regulations to be recruited by an institution and integrate into COVID-19 care; the recruitment and remuneration conditions were plagued with anomalies and important informalities in the process; and the preparation for care was very incipient, so learning occurred in the very care process. The pandemic allowed the participants to enter the nursing labor market in extraordinary and substandard conditions.


El gobierno mexicano, como parte de la respuesta al COVID-19, puso en juego una estrategia para aumentar la dotación de personal de enfermería que incluyó la graduación prematura de estudiantes universitarios para incorporarlos en el frente de la atención. El objetivo del estudio fue analizar las experiencias de estudiantes de enfermería contratados por instituciones de salud para la atención de pacientes COVID. El estudio es cualitativo exploratorio. Incluyó 12 participantes que durante la pasantía recibieron y aceptaron propuestas de empleo en instituciones de salud para la atención de pacientes. Los datos se recolectaron a través de entrevistas semiestructuradas, previo consentimiento informado. Las experiencias de los participantes se integraron en tres temas: los estudiantes aprovecharon la modificación de los reglamentos del servicio social para poder contratarse con una institución e integrarse a la atención del COVID-19; las condiciones de contratación y remuneración estuvieron plagadas de anomalías con importantes informalidades en el proceso; y la preparación para la atención fue muy incipiente por lo que el aprendizaje se llevó a cabo en el proceso mismo de la atención. La pandemia representó para los participantes una oportunidad de ingresar en condiciones extraordinarias y precarias al mercado laboral de enfermería.


Asunto(s)
COVID-19 , Estudiantes de Enfermería , Humanos , Pandemias , México/epidemiología , Investigación Cualitativa
18.
Int J Med Mushrooms ; 25(10): 65-76, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37830197

RESUMEN

Ganoderma species have been used in folk medicine against different illnesses and are characterized by producing a diversity of bioactive metabolites (triterpenoids, polysaccharides, flavonoids, and phenols) with numerous medicinal effects (anti-proliferative, antioxidant, anti-inflammatory, and antibacterial). This work aims to evaluate ethanolic extracts of fruiting bodies of Ganoderma oerstedii, G. weberianum, and G. subincrustatum strains from the Sonoran Desert in the anti-proliferative activity by the MTT assay on cancer cell lines; anti-inflammatory effect by quantifying nitric oxide (NO) production; antioxidant activity by DPPH, ABTS, and FRAP assays; total phenolic and flavonoid content by Folin-Ciocalteu and AlCl3 method, respectively; antibacterial activity by the broth microdilution method against Escherichia coli and Staphylococcus aureus. Extracts showed anti-proliferative activity with IC50 < 100 µg/mL on the cancer cell lines MDA-MB-231, A549, and HeLa, except G. subincrustatum extract with an IC50 > 100 µg/mL; anti-proliferative activity was not selective, being affected non-cancerous cell line ARPE-19. Extracts showed significant inhibition of NO release in cells stimulated by LPS, up to 60% with G. subincrustatum and G. oerstedii, and 47% with G. weberianum. All tested assays showed moderate antioxidant potential; the most active was G. lucium (control strain) with IC50 of 69 and 30 µg/mL by DPPH and ABTS respectively; and 271 µg Trolox equivalents/g by FRAP. Total phenols and flavonoids ranged from 38 to 56 mg GAE/g and 0.53 to 0.93 mg QE/g, respectively. A significant correlation was found between the antioxidant activities revealed by DPPH, ABTS, and FRAP with total phenol and flavonoid contents. Antibacterial activity was weak against S. aureus (MIC50 > 10 mg/mL). These results demonstrate that tested Ganoderma mushrooms have medicinal potential such as anti-inflammatory and anti-proliferative.


Asunto(s)
Antioxidantes , Ganoderma , Antioxidantes/farmacología , Antioxidantes/química , México , Staphylococcus aureus , Extractos Vegetales/química , Antibacterianos/farmacología , Fenoles/análisis , Ganoderma/química , Flavonoides/farmacología , Antiinflamatorios/farmacología
19.
Ciênc. Saúde Colet. (Impr.) ; 28(10): 3003-3013, out. 2023. tab
Artículo en Español | LILACS-Express | LILACS | ID: biblio-1520614

RESUMEN

Resumen El gobierno mexicano, como parte de la respuesta al COVID-19, puso en juego una estrategia para aumentar la dotación de personal de enfermería que incluyó la graduación prematura de estudiantes universitarios para incorporarlos en el frente de la atención. El objetivo del estudio fue analizar las experiencias de estudiantes de enfermería contratados por instituciones de salud para la atención de pacientes COVID. El estudio es cualitativo exploratorio. Incluyó 12 participantes que durante la pasantía recibieron y aceptaron propuestas de empleo en instituciones de salud para la atención de pacientes. Los datos se recolectaron a través de entrevistas semiestructuradas, previo consentimiento informado. Las experiencias de los participantes se integraron en tres temas: los estudiantes aprovecharon la modificación de los reglamentos del servicio social para poder contratarse con una institución e integrarse a la atención del COVID-19; las condiciones de contratación y remuneración estuvieron plagadas de anomalías con importantes informalidades en el proceso; y la preparación para la atención fue muy incipiente por lo que el aprendizaje se llevó a cabo en el proceso mismo de la atención. La pandemia representó para los participantes una oportunidad de ingresar en condiciones extraordinarias y precarias al mercado laboral de enfermería.


Abstract The Mexican government implemented a strategy to increase nursing staff in response to COVID-19, including the early graduation of university students, to incorporate them into the care frontline. This exploratory qualitative study aimed to analyze nursing students' experiences recruited by health institutions to care for COVID patients. It included 12 participants who received and accepted job proposals in health institutions for patient care during their internship. Data were collected through semi-structured interviews with prior informed consent. The experiences of the participants were integrated into three themes: the students took advantage of the modified social service regulations to be recruited by an institution and integrate into COVID-19 care; the recruitment and remuneration conditions were plagued with anomalies and important informalities in the process; and the preparation for care was very incipient, so learning occurred in the very care process. The pandemic allowed the participants to enter the nursing labor market in extraordinary and substandard conditions.

20.
Int J Mol Sci ; 24(15)2023 Jul 30.
Artículo en Inglés | MEDLINE | ID: mdl-37569569

RESUMEN

Testicular cancer is the most prevalent tumor among males aged 15 to 35, resulting in a significant number of newly diagnosed cases and fatalities annually. Non-coding RNAs (ncRNAs) have emerged as key regulators in various cellular processes and pathologies, including testicular cancer. Their involvement in gene regulation, coding, decoding, and overall gene expression control suggests their potential as targets for alternative treatment approaches for this type of cancer. Furthermore, epigenetic modifications, such as histone modifications, DNA methylation, and the regulation by microRNA (miRNA), have been implicated in testicular tumor progression and treatment response. Epigenetics may also offer critical insights for prognostic evaluation and targeted therapies in patients with testicular germ cell tumors (TGCT). This comprehensive review aims to present the latest discoveries regarding the involvement of some proteins and ncRNAs, mainly miRNAs and lncRNA, in the epigenetic aspect of testicular cancer, emphasizing their relevance in pathogenesis and their potential, given the fact that their specific expression holds promise for prognostic evaluation and targeted therapies.


Asunto(s)
MicroARNs , Neoplasias de Células Germinales y Embrionarias , Neoplasias Testiculares , Masculino , Humanos , Neoplasias Testiculares/genética , ARN no Traducido/genética , ARN no Traducido/metabolismo , MicroARNs/genética , MicroARNs/metabolismo , Epigénesis Genética , Neoplasias de Células Germinales y Embrionarias/genética
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