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1.
Psychol Health Med ; 28(6): 1430-1440, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-36164806

RESUMEN

This study aimed to evaluate the influence of COVID-19 on the mental health of Chinese medical students at 1-year of follow-up. From 2 February 2020 to 23 February 2021, we conducted three waves of research online (T1 = during outbreak, T2 = controlling period, T3 = 1 year after outbreak). The survey collected demographic data and several self reporting questionnaires to measure the depressive, anxiety and stress symptoms. A total of 4002 participants complete the whole research phases. The study major, grade level and gender were the main factors related to psychological distress caused by the COVID-19 crisis. Importantly, medical knowledge has a protective effect on medical students' psychological distress during the COVID-19 period.


Asunto(s)
COVID-19 , Estudiantes de Medicina , Humanos , COVID-19/epidemiología , Salud Mental , Depresión/epidemiología , Depresión/psicología , SARS-CoV-2 , Ansiedad/epidemiología , Ansiedad/psicología , China/epidemiología
2.
Plant J ; 107(4): 1084-1101, 2021 08.
Artículo en Inglés | MEDLINE | ID: mdl-34101285

RESUMEN

Bacterial leaf streak (BLS) is a major bacterial disease of rice. Utilization of host genetic resistance has become one of the most important strategies for controlling BLS. However, only a few resistance genes have been characterized. Previously, a recessive BLS resistance gene bls1 was roughly mapped on chromosome 6. Here, we further delineated bls1 to a 21 kb region spanning four genes. Genetic analysis confirmed that the gene encoding a mitogen-activated protein kinase (OsMAPK6) is the target of the allelic genes BLS1 and bls1. Overexpression of BLS1 weakened resistance to the specific Xanthomonas oryzae pv. oryzicola (Xoc) strain JZ-8, while low expression of bls1 increased resistance. However, both overexpression of BLS1 and low expression of bls1 could increase no-race-specific broad-spectrum resistance. These results indicate that BLS1 and bls1 negatively regulate race-specific resistance to Xoc strain JZ-8 but positively and negatively control broad-spectrum resistance, respectively. Subcellular localization demonstrated that OsMAPK6 was localized in the nucleus. RGA4, which is known to mediate resistance to Xoc, is the potential target of OsMAPK6. Overexpression of BLS1 and low expression of bls1 showed increase in salicylic acid and induced expression of defense-related genes, simultaneously increasing broad-spectrum resistance. Moreover, low expression of bls1 showed increase an in jasmonic acid and abscisic acid, in company with an increase in resistance to Xoc strain JZ-8. Collectively, our study provides new insights into the understanding of BLS resistance and facilitates the development of rice host-resistant cultivars.


Asunto(s)
Proteína Quinasa 6 Activada por Mitógenos/genética , Oryza/microbiología , Enfermedades de las Plantas/microbiología , Proteínas de Plantas/genética , Ácido Abscísico/metabolismo , Mapeo Cromosómico , Ciclopentanos/metabolismo , Resistencia a la Enfermedad , Regulación de la Expresión Génica de las Plantas , Interacciones Huésped-Patógeno/fisiología , Proteína Quinasa 6 Activada por Mitógenos/metabolismo , Mutación , Oryza/genética , Oxilipinas/metabolismo , Filogenia , Enfermedades de las Plantas/genética , Proteínas de Plantas/metabolismo , Plantas Modificadas Genéticamente , Xanthomonas/patogenicidad
3.
Appl Microbiol Biotechnol ; 105(16-17): 6369-6379, 2021 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-34402939

RESUMEN

Monascus yellow pigments (MYPs), as food colorants, are of great interest to the food industry, because of their beneficial biological activities. In this study, a comparative metabolomics strategy revealed the metabolic regulatory mechanism of MYP overproduction, comparing ammonium chloride with peptone as nitrogen sources. Metabolomics-based multivariate regression modeling showed that metabolic biomarkers/modules, such as glucose, lactate, and the pentose phosphate (PP) pathway, were closely associated with the biosynthesis of MYPs. Exogenous addition of glucose increased production of MYPs, whereas lactate reduced it. Inhibition of the PP pathway with dehydroepiandrosterone decreased MYP production, while increasing the shunting production of orange and red pigments. All these treatments significantly changed the expression profiles of the pigment biosynthetic gene cluster and the mycelial morphology. Overall, this study demonstrates the feasibility of elucidating the mechanism of MYP biosynthesis by comprehensive metabolomics analysis, as well as discovering potential engineering targets of efficiency improvements to commercial MYP production. KEY POINTS: • Comparative metabolomics revealed the biomarkers/modules of MYP production. • A rational exogenously adding strategy was implemented to regulate MYP synthesis. • Expression profiles of gene cluster and mycelial morphology were characterized.


Asunto(s)
Monascus , Cloruro de Amonio , Metabolómica , Nitrógeno , Pigmentos Biológicos
4.
J Stroke Cerebrovasc Dis ; 29(11): 105286, 2020 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-33066914

RESUMEN

BACKGROUND: Stroke is one of the leading causes of death and disability worldwide. Scalp acupuncture and exercise therapy have been proven as two effective methods for the treatment of stroke. However, their combined action and mechanisms have not been fully elucidated. The present study aimed to investigate the protective effect of scalp acupuncture combined with exercise therapy on neurons in rats with ischemic brain injury. METHODS: 100 rats were randomly divided into 5 groups including sham group, model group, acupuncture group, rehabilitation group, and experimental group (scalp acupuncture combined with exercise therapy). Middle cerebral artery occlusion (MCAO) model in rats was established according to Longa modified suture method to mimic ischemic stroke. The modified Bedexer's neurological function score was used to evaluate the neurological deficits of rats and the brain infarct volume was measured using 2, 3, 5-triphenyl tetrazolium chloride monohydrate (TTC) staining. Moreover, the apoptosis in the hippocampus was detected by western blotting and terminal deoxynucleotidyl transferase dUTP nick end labeling (TUNEL) assay. The pro-inflammatory cytokines such as interleukin-1 beta (IL-1ß) and tumor necrosis factor-alpha (TNF-α), reactive oxygen species (ROS) and superoxide dismutase (SOD) were determined by corresponding kits. Immunohistochemistry or immunofluorescence was performed to detect the expression of brain-derived neurotrophic factor (BDNF), S100ß and glial fibrillary acidic protein (GFAP) in the hippocampi of rats. RESULTS: The neurological deficit score, the expression levels of apoptotic factors such as cleaved caspase-3 and Bax, and the TUNEL-positive cell rate of the experimental group were significantly lower than those of the acupuncture group and the rehabilitation group. However, apoptosis inhibitor Bcl-2 showed downregulated expression in the MCAO model rats but this trend was reverted by single and combinatorial treatments. In addition, the contents of TNF-α, IL-1ß and ROS in the acupuncture group and the rehabilitation group were significantly lower than those in the model group, but higher than the experimental group. While the opposite results were obtained in SOD activity. Furthermore, compared with the model group, the ratios of BDNF, S100ß, and GFAP-positive cells in the acupuncture, rehabilitation and experimental groups were significantly increased, and the highest ratios were recorded in the experimental group. CONCLUSIONS: This study demonstrated that scalp acupuncture combined with exercise therapy effectively counteracts ischemic brain injury via the downregulation of pro-inflammatory mediators and ROS, the increased production of the antioxidant enzyme SOD, neurotrophic factor BDNF and astrocyte activities.


Asunto(s)
Puntos de Acupuntura , Terapia por Acupuntura , Apoptosis , Encéfalo/patología , Terapia por Ejercicio , Infarto de la Arteria Cerebral Media/prevención & control , Cuero Cabelludo , Animales , Proteínas Reguladoras de la Apoptosis/metabolismo , Conducta Animal , Encéfalo/metabolismo , Encéfalo/fisiopatología , Factor Neurotrófico Derivado del Encéfalo/metabolismo , Citocinas/metabolismo , Modelos Animales de Enfermedad , Proteína Ácida Fibrilar de la Glía/metabolismo , Infarto de la Arteria Cerebral Media/metabolismo , Infarto de la Arteria Cerebral Media/patología , Infarto de la Arteria Cerebral Media/psicología , Mediadores de Inflamación/metabolismo , Masculino , Necrosis , Ratas Sprague-Dawley , Especies Reactivas de Oxígeno/metabolismo , Subunidad beta de la Proteína de Unión al Calcio S100/metabolismo , Superóxido Dismutasa/metabolismo
5.
Biotechnol Lett ; 41(10): 1213-1222, 2019 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-31451996

RESUMEN

OBJECTIVES: In order to elucidate the antibacterial activity and mechanism of S. alboflavus TD-1 active metabolites, the minimal inhibitory concentration of R. solanacearum and other effects on cell wall, cell membrane, nucleic acid, protein and cell morphology were studied. Besides, based on LCMS-IT-TOF, the active metabolites of S. alboflavus TD-1 were preliminarily analyzed. RESULTS: In this study, We found that the active metabolites had obvious inhibitory effect on R. solanacearum, and the minimal inhibitory concentration (MIC) of R. solanacearum was 3.125 mg/mL. And the treatment of 10 mg/mL active metabolites can increase the permeability of R. solanacearum membranes, destroy the cell wall integrity, inhibit the synthesis of bacterial nucleic acids and proteins, and cause leakage of bacterial nucleic acids and proteins, obstruct the normal expression of proteins and destroy their bacterial morphology. At the same time, We speculated the molecular weights corresponding to the six compounds were 618, 615, 615, 615, 646, 646, respectively among the active metabolites, and it was found that were highly unstable. CONCLUSIONS: The active metabolites produced by S. alboflavus TD-1 liquid fermentation contain components that can significant inhibitory effects on R. solanacearum. It had the potential to develop biocontrol agents against bacterial wilt and be a kind potential sources for the preparation of functional anti-pathogenic microbial agents.


Asunto(s)
Antibacterianos/metabolismo , Antibacterianos/farmacología , Ralstonia solanacearum/efectos de los fármacos , Ralstonia solanacearum/crecimiento & desarrollo , Streptomyces/metabolismo , Antibacterianos/química , Antibacterianos/aislamiento & purificación , Vías Biosintéticas/efectos de los fármacos , Membrana Celular/efectos de los fármacos , Pared Celular/efectos de los fármacos , Medios de Cultivo/química , ADN Bacteriano/biosíntesis , Fermentación , Pruebas de Sensibilidad Microbiana , Peso Molecular , Biosíntesis de Proteínas/efectos de los fármacos , Ralstonia solanacearum/citología
6.
Biochem Biophys Res Commun ; 503(2): 621-624, 2018 09 05.
Artículo en Inglés | MEDLINE | ID: mdl-29906463

RESUMEN

The fatty acid profile of plant oils determines their quality and uses. Saturated fatty acids are often not desirable from the standpoints of nutrition and some industrial applications. Camelina sativa is a re-emerged oilseed crop, however its oil needs to be improved to meet different application requirements. In this study, saturated fatty acids were greatly reduced by down-regulating genes encoding the fatty acyl-ACP thioesterases (FATB). An artificial microRNA (amiFATB) was created by replacing a microRNA sequence in the camelina Csa-miR159a gene with a FATB gene specific sequence. Seed-specific expression of amiFATB caused a 45% reduction of palmitic acid (16:0) and a 38% reduction of stearic acid (18:0) compared to wildtype seeds. The total saturated fatty acid content was decreased by 35% from 14.6% to 9.4% of total fatty acids. When amiFATB was expressed in a high-oleic acid transgenic line, it caused further increased oleic acid content. This work demonstrates that the FATB genes in camelina can be effectively knocked down by an artificial microRNA targeting gene-specific sequences, thus provides an additional tool to improve seed oils for desired properties.


Asunto(s)
Camellia/genética , Ácidos Grasos/genética , Regulación de la Expresión Génica de las Plantas , Técnicas de Silenciamiento del Gen , Proteínas de Plantas/genética , Semillas/genética , Tioléster Hidrolasas/genética , Camellia/química , Regulación hacia Abajo , Ácidos Grasos/análisis , Genes de Plantas , MicroARNs/genética , Plantas Modificadas Genéticamente/química , Plantas Modificadas Genéticamente/genética , Semillas/química
7.
Inorg Chem ; 57(19): 12417-12423, 2018 Oct 01.
Artículo en Inglés | MEDLINE | ID: mdl-30226057

RESUMEN

To comparably analyze the influence of a porous environment on the gas adsorption in MOFs, based on an imidazole-decorated MOF, {[Zn(imtp)]·DMA·1.5H2O} n (1-im, H2imtp = 2-(imidazol-1-yl) terephthalic acid), an analogue MOF, {[Zn(tztp)]·DMA} n (1-tz, H2tztp = 2-(1 H-1,2,4-triazol-1-yl) terephthalic acid) has been synthesized by replacing imidazole with triazole motifs. The two MOFs are isostructural frameworks containing 1D channels; however, they possess different porous wall environments. The open nitrogen-decorated channels in 1-tz lead to significantly enhanced C2H6 (76.5 cm3 g-1) and C2H4 (73.1 cm3 g-1) uptakes at 298 K and 1 atm, which are 5 times of the adsorption amounts of C2H6 and C2H4 in 1-im that is the absence of exposed N atoms in the channels. Furthermore, the activated 1-tz also reveals higher adsorption selectivities for C2H6 and C2H4 over CH4. The different sorption properties were further uncovered by theoretical simulations.

8.
Pak J Pharm Sci ; 31(6): 2487-2495, 2018 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-30473522

RESUMEN

We investigated the cellulase-assisted extraction and anti-ultraviolet activity of water-soluble polysaccharides from the root of Flammulina velutipes on Caenorhabditis elegans. A Box-Behnken design experiment with three factors and three levels, including enzymolysis temperature, microwave time, and microwave power, was designed on the basis of the results of single-factor experiments. For improving the polysaccharide yield of F. velutipes root, the following optimal extraction conditions were used: 52.67°C enzymolysis temperature, 80s microwave time, and 144 W microwave power. Under optimal conditions, the actual measured value of the yield was 2.01% (w/w) and the predicted value was 2.06% (w/w). One fraction (FRP-2) was isolated and purified, and its characteristics were analyzed. The average mean molecular weight of FRP-2 was measured to be 2.60×105 Da, and its monosaccharide composition is mainly glucose. The sugar units are present both in the α-configuration and ß-configuration. Moreover, FRP-2 exhibited certain anti-ultraviolet activity to C. elegans when the polysaccharide concentration ranged between 0.05mg/mL and 0.20mg/mL.


Asunto(s)
Caenorhabditis elegans/efectos de los fármacos , Caenorhabditis elegans/efectos de la radiación , Celulasa/química , Flammulina , Extractos Vegetales/farmacología , Raíces de Plantas , Polisacáridos/farmacología , Protectores contra Radiación/farmacología , Rayos Ultravioleta , Animales , Conformación de Carbohidratos , Flammulina/química , Hidrólisis , Microondas , Extractos Vegetales/química , Extractos Vegetales/aislamiento & purificación , Raíces de Plantas/química , Polisacáridos/química , Polisacáridos/aislamiento & purificación , Protectores contra Radiación/química , Protectores contra Radiación/aislamiento & purificación , Relación Estructura-Actividad , Temperatura , Factores de Tiempo
9.
Food Technol Biotechnol ; 55(1): 40-47, 2017 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-28559732

RESUMEN

In this study, the effects of temperature-shift (from 30 to 25 °C) and temperature-constant (at 30 °C) cultivation on the mass of Monascus fuliginosus CG-6 mycelia and concentration of the produced monacolin K (MK) were monitored. The expression levels of the MK biosynthetic genes of M. fuliginosus CG-6 at constant and variable culture temperatures were analysed by real-time quantitative polymerase chain reaction (RT-qPCR). The total protein was collected and determined by liquid chromatography-electrospray ionisation with tandem mass spectrometry (LC-ESI-MS/MS). Results showed that the maximum mycelial mass in temperature-shift cultivation was only 0.477 g of dry cell mass per dish, which was lower than that in temperature-constant cultivation (0.581 g of dry cell mass per dish); however, the maximum concentration of MK in temperature-shift cultivation (34.5 µg/mL) was 16 times higher than that in temperature-constant cultivation at 30 °C (2.11 µg/mL). Gene expression analysis showed that the expression of the MK biosynthetic gene cluster at culture temperature of 25 °C was higher than that at 30 °C, which was similar to the trend of the MK concentration, except for individual MK B and MK C genes. Analysis of differential protein expression revealed that 2016 proteins were detected by LC-ESI-MS/MS. The expression level of efflux pump protein coded by the MK I gene exhibited the same upregulated trend as the expression of MK I in temperature-shift cultivation. Temperature-shift cultivation enhanced the expression of proteins in the secondary metabolite production pathway, but suppressed the expression of proteins involved in the mycelial growth.

10.
Inorg Chem ; 55(21): 11323-11330, 2016 Nov 07.
Artículo en Inglés | MEDLINE | ID: mdl-27759963

RESUMEN

Two new three-dimensional isostructural lanthanide metal-organic frameworks (Ln(III)-MOFs), [LnL(H2O)3]·3H2O·0.75DMF (1-Ln; Ln = Dy(III) and Eu(III) ions, H3L = biphenyl-3'-nitro-3,4',5-tricarboxylic acid, DMF = N,N'-dimethylformamide), were synthesized and characterized. The appearance of temperature-dependent out-of-phase (χ″M) signal reveals that complex 1-Dy displays slow magnetic relaxation behavior with the energy barrier (ΔUeff) of 57 K and a pre-exponential factor (τ0) of 3.89 × 10-8 s at 1200 Oe direct current field. The luminescence explorations demonstrated that 1-Eu exhibits high quenching efficiency and low detection limit for sensing nitrobenzene and Cr2O72-. Meanwhile, the fluorescence intensity of the quenched 1-Eu samples will be resumed after washing with DMF or water, indicating that 1-Eu may be used as a highly selective and recyclable luminescence sensing material for sensing nitrobenzene and Cr2O72- anion.

11.
Prep Biochem Biotechnol ; 46(8): 772-779, 2016 Nov 16.
Artículo en Inglés | MEDLINE | ID: mdl-26950801

RESUMEN

Microbial fermentation of citrinin-free Monascus pigments is in favor in the development of food industry. This study investigated the influences of carbon source, nitrogen source, and mineral salts on the cell growth, monascin (MS), and citrinin (CT) production in Monascus M9. A culture medium composition was established for maximizing the production of citrinin-free MS in submerged culture, as follows: 50 g/L Japonica rice powder, 20 g/L NH4NO3, 3 g/L NaNO3, 1.5 g/L KH2PO4, 1 g/L MgSO4 · 7H2O, 0.2 g/L MnSO4. Under these conditions, no CT was detectable by high performance liquid chromatography. The yield of MS reached 14.11 mg/g, improving approximately 30% compared with before optimization.


Asunto(s)
Medios de Cultivo/metabolismo , Fermentación , Compuestos Heterocíclicos con 3 Anillos/metabolismo , Microbiología Industrial/métodos , Monascus/metabolismo , Citrinina/metabolismo , Nitratos/metabolismo , Oryza/microbiología
12.
Biotechnol Lett ; 37(5): 1043-8, 2015 May.
Artículo en Inglés | MEDLINE | ID: mdl-25564393

RESUMEN

Light is an important signal for fungi. We analyzed the influence of blue light of various intensities and illumination times on growth, monascin (MS) and ankaflavin (AK) biosyntheses in Monascus strain M9. Blue light changed the color of colonies. The colonies grown in the dark were orange, but turned pale when exposed to continuous blue light. MS production increased by 12.5, 27, and 14.5 % under blue light of 100 lux for 15 min/day, 100 lux for 30 min/day, and 200 lux for 15 min/day, respectively, compared to growth in the dark. AK production increased by 14.4, 22, and 13 % under the same condition. MS and AK production decreased when exposed to blue light of 300 and 450 lux. The expression of pigment biosynthetic genes were analyzed by real-time quantitative PCR and correlated with phenotypic production of MS and AK.


Asunto(s)
Flavinas/metabolismo , Compuestos Heterocíclicos con 3 Anillos/metabolismo , Luz , Monascus/crecimiento & desarrollo , Monascus/efectos de la radiación , Vías Biosintéticas/efectos de la radiación , Perfilación de la Expresión Génica , Monascus/metabolismo , Pigmentos Biológicos/metabolismo
13.
Int J Biol Macromol ; 259(Pt 2): 129369, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38218271

RESUMEN

The impact of the cell wall structure of Monascus purpureus M9 on the secretion of extracellular monascus pigments (exMPs) was investigated. To modify the cell wall structure, UDP-galactopyranose mutase (GlfA) was knocked out using Agrobacterium-mediated transformation method, leading to a significant reduction in the Galf-based polysaccharide within the cell wall. Changes in mycelium morphology, sporogenesis, and the expression of relevant genes in M9 were also observed following the mutation. Regarding MPs secretion, a notable increase was observed in six types of exMPs (R1, R2, Y1, Y2, O1 and O2). Specifically, these exMPs exhibited enhancement of 1.33, 1.59, 0.8, 2.45, 2.89 and 4.03 times, respectively, compared to the wild-type strain. These findings suggest that the alteration of the cell wall structure could selectively influence the secretion of MPs in M9. The underlying mechanisms were also discussed. This research contributes new insights into the regulation of the synthesis and secretion of MPs in Monascus spp..


Asunto(s)
Galactosa/análogos & derivados , Transferasas Intramoleculares , Mananos , Monascus , Monascus/genética , Monascus/metabolismo , Pigmentos Biológicos , Metabolismo de los Hidratos de Carbono , Fermentación
14.
Biotechnol Lett ; 35(4): 491-8, 2013 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-23192380

RESUMEN

UV-induced DNA damage plays a key role in the etiology of certain diseases. The ability of blueberry anthocyanins and anthocyanidins (BA) to protect cellular DNA from UV-induced damage was investigated. BA were extracted by water (BAW), ethanol (BAE) or methanol (BAM). These extracts partially restored proliferation of UV-irradiated HepG2 cells as shown by MTT assay. Treatment with BA extracts at 75 µg/ml decreased reactive oxygen species and decreased DNA damage by tail moment of comet assay and expression of γH2AX in situ. BAM significantly decreased gene and protein expression of p53, phospho-p53 (Ser15), and p21 in UV-irradiated HepG2 cells. BA thus efficiently protects cells from DNA damage in vitro. Blueberry may potentially be used as a good source of naturally radioprotective agents.


Asunto(s)
Antocianinas/farmacología , Arándanos Azules (Planta)/química , Daño del ADN/efectos de la radiación , Protectores contra Radiación/farmacología , Rayos Ultravioleta , Antocianinas/aislamiento & purificación , Supervivencia Celular , Ensayo Cometa , Perfilación de la Expresión Génica , Células Hep G2 , Humanos , Protectores contra Radiación/aislamiento & purificación , Especies Reactivas de Oxígeno/análisis , Coloración y Etiquetado/métodos , Sales de Tetrazolio/metabolismo , Tiazoles/metabolismo
15.
Int J Mol Sci ; 14(11): 21447-62, 2013 Oct 30.
Artículo en Inglés | MEDLINE | ID: mdl-24177565

RESUMEN

Growth Arrest and DNA Damage-inducible 45 (Gadd45) and MDM2 proteins, together with p21 and p53, play important roles in cell cycle checkpoints, DNA repair, and genome integrity maintenance. Gadd45 and MDM2 were activated and transcribed instantly by UV irradiation, whereas blueberry anthocyanins (BA) decreased the gene and protein expression levels in HepG2 cells for up to 24 h, and gradually restored the UV-induced fragmented and non-fragmented DNA damage of the nucleus at a time point of 12 h. Nevertheless, UV-irradiated HepG2 cell arrests occurred mainly in the G1 phase, which indicated G1 as a checkpoint. The proteins, p21 and p53, retain cellular integrity, suppressing the oncogenic transformation by interruption of the G1 phase of the cellular cycle, giving time for repairing the damage to DNA, or apoptosis induction if the damage is too severe to be repaired, while MDM2 and Gadd45 concomitantly ensure the presence of p53 and p21. Thus, we conclude that repair, together with Gadd45 and MDM2 genes, were involved in light and dark reaction mechanisms, however, BA could interfere and assist the repair through restoration, although further studies of the complex of the gene cascades triggered and responded to in BA-assisted DNA repair are needed.


Asunto(s)
Antocianinas/farmacología , Proteínas de Ciclo Celular/biosíntesis , Daño del ADN/efectos de los fármacos , Reparación del ADN/efectos de los fármacos , Proteínas Nucleares/biosíntesis , Proteínas Proto-Oncogénicas c-mdm2/biosíntesis , Antocianinas/química , Arándanos Azules (Planta)/química , Proteínas de Ciclo Celular/metabolismo , Daño del ADN/efectos de la radiación , Reparación del ADN/efectos de la radiación , Regulación de la Expresión Génica/efectos de los fármacos , Regulación de la Expresión Génica/efectos de la radiación , Células Hep G2 , Humanos , Proteínas Nucleares/metabolismo , Proteínas Proto-Oncogénicas c-mdm2/metabolismo , Proteína p53 Supresora de Tumor/metabolismo , Rayos Ultravioleta , Proteínas de Unión al GTP rho/metabolismo
16.
Front Microbiol ; 14: 1199144, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37303795

RESUMEN

Background: Species of the genus Monascus are economically important and widely used in the production of food colorants and monacolin K. However, they have also been known to produce the mycotoxin citrinin. Currently, taxonomic knowledge of this species at the genome level is insufficient. Methods: This study presents genomic similarity analyses through the analysis of the average nucleic acid identity of the genomic sequence and the whole genome alignment. Subsequently, the study constructed a pangenome of Monascus by reannotating all the genomes and identifying a total of 9,539 orthologous gene families. Two phylogenetic trees were constructed based on 4,589 single copy orthologous protein sequences and all the 5,565 orthologous proteins, respectively. In addition, carbohydrate active enzymes, secretome, allergic proteins, as well as secondary metabolite gene clusters were compared among the included 15 Monascus strains. Results: The results clearly revealed a high homology between M. pilosus and M. ruber, and their distant relationship with M. purpureus. Accordingly, all the included 15 Monascus strains should be classified into two distinctly evolutionary clades, namely the M. purpureus clade and the M. pilosus-M. ruber clade. Moreover, gene ontology enrichment showed that the M. pilosus-M. ruber clade had more orthologous genes involved with environmental adaptation than the M. purpureus clade. Compared to Aspergillus oryzae, all the Monascus species had a substantial gene loss of carbohydrate active enzymes. Potential allergenic and fungal virulence factor proteins were also found in the secretome of Monascus. Furthermore, this study identified the pigment synthesis gene clusters present in all included genomes, but with multiple nonessential genes inserted in the gene cluster of M. pilosus and M. ruber compared to M. purpureus. The citrinin gene cluster was found to be intact and highly conserved only among M. purpureus genomes. The monacolin K gene cluster was found only in the genomes of M. pilosus and M. ruber, but the sequence was more conserved in M. ruber. Conclusion: This study provides a paradigm for phylogenetic analysis of the genus Monascus, and it is believed that this report will lead to a better understanding of these food microorganisms in terms of classification, metabolic differentiation, and safety.

17.
Food Funct ; 14(5): 2459-2471, 2023 Mar 06.
Artículo en Inglés | MEDLINE | ID: mdl-36790135

RESUMEN

Ankaflavin (AK) is a typical yellow pigment extracted from Monascus-fermented rice with several biological effects; however, its solubility is poor. Thus, research studies of the delivery systems of AK, especially those constructed from protein-polysaccharide complexes, have attracted considerable attention. However, the interactions that exist in the system have rarely been investigated. This work focused on the interactions between AK and bovine serum albumin (BSA) as well as the influence of carrageenan (Car) on the binding of AK to BSA. Results revealed that the quenching of BSA by AK involved the static quenching mechanism. The formed BSA-AK complexes were mainly maintained by hydrophobic forces and AK was located within the hydrophobic cavity of BSA. Compared to free AK or AK only complexed with BSA, a higher absorption intensity of AK was observed for the formed BSA-AK-Car complexes, indicating changes in the microenvironment of AK. This was confirmed by the increase in the α-helix content of BSA after the formation of BSA-AK-Car complexes. Hydrogen bond, van der Waals, and electrostatic interactions were verified to be the primary forces preserving the BSA-AK-Car complexes. Moreover, the antioxidant potential of Monascus-fermented products rich in AK (denoted as Mps), namely BSA-Mps and BSA-Mps-Car was evaluated. The antioxidant activity of Mps was negatively impacted by BSA, while the addition of Car could enhance the antioxidant capacity of BSA-Mps-Car complexes. Meanwhile, Mps showed a protective effect against free radical-induced oxidation damage to BSA, and Car could further improve this effect.


Asunto(s)
Antioxidantes , Monascus , Antioxidantes/farmacología , Antioxidantes/metabolismo , Albúmina Sérica Bovina/metabolismo , Carragenina , Monascus/metabolismo , Estrés Oxidativo , Espectrometría de Fluorescencia , Termodinámica , Unión Proteica , Sitios de Unión , Simulación del Acoplamiento Molecular
18.
Front Public Health ; 10: 911868, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35923954

RESUMEN

Objective: This study aimed to elicit the stated job preferences of Chinese medical staff in the post-pandemic era and identify the relative importance of different factors in the practice environment. Methods: We used an online discrete choice experiment (DCE) survey instrument to elicit the job preferences of medical staff (doctors and nurses) in tertiary hospitals in Anhui, China. Attributes and levels were generated using qualitative methods, and four attributes were considered: career development, workload, respect from society, and monthly income. A set of profiles was created using a D-efficient design. The data were analyzed considering potential preference heterogeneity, using the conditional logit model and the latent class logit (LCL) model. Results: A total of 789 valid questionnaires were included in the analysis, with an effective response rate of 73.33%. Career development, workload, respect from society, and monthly income were significant factors that influenced job preferences. Three classes were identified based on the LCL model, and preference heterogeneity among different medical staff was demonstrated. Class 1 (16.17%) and Class 2 (43.51%) valued respect from society most, whereas Class 3 (40.32%) prioritized monthly income. We found that when respect from society was raised to a satisfactory level (50-75% positive reviews), the probability of medical staff choosing a certain job increased by 69.9%. Conclusion: Respect from society was the most preferred attribute, while workload, monthly income, and career development were all key factors in the medical staff's job choices. The heterogeneity of the medical professionals' preferences shows that effective policy interventions should be customized to accommodate these drive preferences.


Asunto(s)
Selección de Profesión , Conducta de Elección , China , Humanos , Cuerpo Médico , Pandemias
19.
Biomed Res Int ; 2021: 3540830, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34493978

RESUMEN

As the value of blockchain has been widely recognized, more and more industries are proposing their blockchain solutions, including the rehabilitation medical industry. Blockchain can play a powerful role in the field of rehabilitation medicine, bringing a new research idea to the management of rehabilitation medical data. The electronic rehabilitation medical record (ERMR) contains rich data dimensions, which can provide comprehensive and accurate information for assessing the health of patients, thereby enhancing the effect of rehabilitation treatment. This paper analyzed the data characteristics of ERMR and the application requirements of blockchain in rehabilitation medicine. Based on the basic principles of blockchain, the technical advantages of blockchain used in ERMR sharing have been studied. In addition, this paper designed a blockchain-based ERMR sharing scheme in detail, using the specific technologies of blockchain such as hybrid P2P network, block-chain data structure, asymmetric encryption algorithm, digital signature, and Raft consensus algorithm to achieve distributed storage, data security, privacy protection, data consistency, data traceability, and data ownership in the process of ERMR sharing. The research results of this paper have important practical significance for realizing the safe and efficient sharing of ERMR, and can provide important technical references for the management of rehabilitation medical data with broad application prospects.


Asunto(s)
Cadena de Bloques/normas , Seguridad Computacional/normas , Confidencialidad/normas , Registros Electrónicos de Salud/estadística & datos numéricos , Hospitales de Rehabilitación/organización & administración , Difusión de la Información/métodos , Humanos
20.
Artículo en Inglés | MEDLINE | ID: mdl-33763146

RESUMEN

In 1979, the first computer program for TCM diagnosis was launched, although this time was about 30 years after artificial intelligence (AI) came into being and began to be widely used. However, an endless stream of artificial intelligence methods was applied in the field of Chinese medicine research, expert system, artificial neural network, data mining, and multivariate analysis; not limited to what was mentioned, this study tried to make a review on application of AI to TCM syndrome differentiation, while summarizing the artificial intelligence application of TCM syndrome differentiation in the current context. It also provides a theoretical background for the upcoming fully automated research on TCM syndrome differentiation and diagnosis robot.

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