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1.
Int J Biol Macromol ; 268(Pt 2): 131905, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38688346

RESUMEN

Gelatin and sodium alginate (SA) are two important biological macromolecules, exhibiting excellent biocompatibility and gel-forming ability. However, traditional SA and gelatin hydrogel displays limited mass transport, low porosity, instability, and poor mechanical properties extremely restricted their therapeutic effect and application scenarios. Herein, microbial fermentation and synergistic toughening strategies were used for preparing macroporous and tough hydrogel. The study investigated the fermentation and toughening conditions of hydrogel. The hydrogel composed of CaCl2 cross-linked physically network and EDC/NHS cross-linked covalently network, exhibiting significantly improved mechanical properties, and excellent recovery efficiency. In addition, the hydrogel has a hierarchical macroporous structure of 100-500 µm, demonstrating high porosity of 10 times, swelling rate of 1541.0 %, and high mass infiltration capability. Further, after Ag+ treatment, the macroporous hydrogel dressing showed outstanding biocompatibility. Compared with non-porous hydrogel, the resulting macroporous hydrogel dressing displayed high antibacterial and antioxidant properties. It could effectively alleviate intracellular ROS formation induced by H2O2.In vivo experiments indicated that it has significantly better effect than non-porous hydrogel in accelerating wound healing. The overall results suggest that the gelatin/SA-based macroporous and tough hydrogel proposed in this study holds excellent prospects for application in wound dressings.


Asunto(s)
Alginatos , Antibacterianos , Fermentación , Gelatina , Hidrogeles , Cicatrización de Heridas , Alginatos/química , Alginatos/farmacología , Gelatina/química , Hidrogeles/química , Hidrogeles/farmacología , Cicatrización de Heridas/efectos de los fármacos , Porosidad , Animales , Ratones , Antibacterianos/farmacología , Antibacterianos/química , Vendajes , Materiales Biocompatibles/química , Materiales Biocompatibles/farmacología , Antioxidantes/farmacología , Antioxidantes/química
2.
Compr Rev Food Sci Food Saf ; 23(3): e13349, 2024 05.
Artículo en Inglés | MEDLINE | ID: mdl-38638060

RESUMEN

3D printing is an additive manufacturing technology that locates constructed models with computer-controlled printing equipment. To achieve high-quality printing, the requirements on rheological properties of raw materials are extremely restrictive. Given the special structure and high modifiability under external physicochemical factors, the rheological properties of proteins can be easily adjusted to suitable properties for 3D printing. Although protein has great potential as a printing material, there are many challenges in the actual printing process. This review summarizes the technical considerations for protein-based ink 3D printing. The physicochemical factors used to enhance the printing adaptability of protein inks are discussed. The post-processing methods for improving the quality of 3D structures are described, and the application and problems of fourth dimension (4D) printing are illustrated. The prospects of 3D printing in protein manufacturing are presented to support its application in food and cultured meat. The native structure and physicochemical factors of proteins are closely related to their rheological properties, which directly link with their adaptability for 3D printing. Printing parameters include extrusion pressure, printing speed, printing temperature, nozzle diameter, filling mode, and density, which significantly affect the precision and stability of the 3D structure. Post-processing can improve the stability and quality of 3D structures. 4D design can enrich the sensory quality of the structure. 3D-printed protein products can meet consumer needs for nutritional or cultured meat alternatives.


Asunto(s)
Tinta , Impresión Tridimensional , Alimentos , Carne in Vitro , Sustitutos de la Carne
3.
Int J Biol Macromol ; 261(Pt 1): 129663, 2024 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-38278396

RESUMEN

Paenibacillus polymyxa (P. polymyxa) is a member of the genus Paenibacillus, which is a rod-shaped, spore-forming gram-positive bacterium. P. polymyxa is a source of many metabolically active substances, including polypeptides, volatile organic compounds, phytohormone, hydrolytic enzymes, exopolysaccharide (EPS), etc. Due to the wide range of compounds that it produces, P. polymyxa has been extensively studied as a plant growth promoting bacterium which provides a direct benefit to plants through the improvement of N fixation from the atmosphere and enhancement of the solubilization of phosphorus and the uptake of iron in the soil, and phytohormones production. Among the metabolites from P. polymyxa, EPS exhibits many activities, for example, antioxidant, immunomodulating, anti-tumor and many others. EPS has various applications in food, agriculture, environmental protection. Particularly, in the field of sustainable agriculture, P. polymyxa EPS can be served as a biofilm to colonize microbes, and also can act as a nutrient sink on the roots of plants in the rhizosphere. Therefore, this paper would provide a comprehensive review of the advancements of diverse aspects of EPS from P. polymyxa, including the production, extraction, structure, biosynthesis, bioactivity and applications, etc. It would provide a direction for future research on P. polymyxa EPS.


Asunto(s)
Paenibacillus polymyxa , Paenibacillus , Paenibacillus polymyxa/metabolismo , Paenibacillus/metabolismo , Reguladores del Crecimiento de las Plantas/metabolismo , Desarrollo de la Planta , Plantas/metabolismo
4.
J Mol Cell Biol ; 2023 Nov 23.
Artículo en Inglés | MEDLINE | ID: mdl-37996395

RESUMEN

Previous studies have shown that hepatocyte-like cells can be generated from fibroblasts using either lineage-specific transcription factors or chemical induction methods. However, these methods have their own deficiencies that restrict the therapeutic applications of such induced hepatocytes. In this study, we present a transgene-free, highly efficient chemical-induced direct reprogramming approach to generate hepatocyte-like cells from mouse embryonic fibroblasts (MEFs). Using a small molecule cocktail (SMC) as an inducer, MEFs can be directly reprogrammed into hepatocyte-like cells, bypassing pluripotent and immature hepatoblast intermediate stages. These chemical-induced hepatocyte-like cells (ciHeps) closely resemble mature primary hepatocytes in terms of morphology, biological behavior, gene expression patterns, marker expression levels, and hepatic functions. Furthermore, transplanted ciHeps can integrate into the liver, promote liver regeneration, and improve survival rates in mice with acute liver damage. ciHeps can also ameliorate liver fibrosis caused by chronic injuries and enhance liver function. Notably, ciHeps exhibit no tumorigenic potential either in vitro or in vivo. Mechanistically, SMC-induced mesenchymal-to-epithelial transition and suppression of SNAI1 contribute to the fate conversion of fibroblasts into ciHeps. These results indicate that this transgene-free, chemical-induced direct reprogramming technique has the potential to serve as a valuable means of producing alternative hepatocytes for both research and therapeutic purposes. Additionally, this method also sheds light on the direct reprogramming of other cell types under chemical induction.

5.
Ying Yong Sheng Tai Xue Bao ; 34(4): 876-882, 2023 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-37078304

RESUMEN

Conservation tillage is an important management practice to guarantee soil fertility in degraded Mollisols. It is still unclear, however, whether the improvement and stability of crop yield under conservation tillage can be sustainable with increasing soil fertility and reducing fertilizer-N application. Based on a long-term tillage experiment initiated in Lishu Conservation Tillage Research and Development Station by Chinese Academy of Sciences, we conducted a 15N tracing field micro-plot experiment to investigate the effects of reducing nitrogen application on maize yield and fertilizer-N transformation under long-term conservation tillage agroecosystem. There were four treatments, including conventional ridge tillage (RT), no-tillage with 0% (NT0), 100% (NTS) maize straw mul-ching, and 20% reduced fertilizer-N plus 100% maize stover mulching (RNTS). The results showed that after a complete cultivation round, the average percentages of fertilizer N recovery in soil residues, crop usage, and gaseous loss were 34%, 50%, and 16%, respectively. Compared with conventional ridge tillage, no-tillage with maize straw mulching (NTS and RNTS) significantly increased the use efficiency of fertilizer N in current season by 10% to 14%. From the perspective of N sourcing analysis, the average percentage of fertilizer N absorbed by crop parts (including seeds, straws, roots, and cobs) to the total N uptake reached nearly 40%, indicating that soil N pool was the main source of N for crop uptakes. In comparison with conventional ridge tillage, conservation tillage significantly increased total N storage in 0-40 cm by reducing soil disturbance and increasing organic inputs, and thus ensured the expansion and efficiency increment of soil N pool in degraded Mollisols. Compared with conventional ridge tillage, NTS and RNTS treatments significantly increased the maize yield from 2016 to 2018. In all, by improving fertilizer nitrogen utilization efficiency and maintaining the continuous supply of soil nitrogen, long-term management of no-tillage with maize straw mulching could achieve a stable and increasing maize yield in three consecutive growing seasons and simultaneously reduce environmental risks derived by fertilizer-N losses, even under the condition of 20% reduction of fertilizer-N application, and thus actualize the sustainable development of agriculture in Mollisols of Northeast China.


Asunto(s)
Fertilizantes , Zea mays , Nitrógeno/análisis , Agricultura/métodos , Suelo/química , Grano Comestible/química , China
6.
Med Res Rev ; 43(4): 1091-1140, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-36945751

RESUMEN

Alzheimer's disease (AD) is a progressive neurodegenerative disease that is difficult to treat. Extracellular amyloid is the principal pathological criterion for the diagnosis of AD. Amyloid ß (Aß) interacts with various receptor molecules on the plasma membrane and mediates a series of signaling pathways that play a vital role in the occurrence and development of AD. Research on receptors that interact with Aß is currently ongoing. Overall, there are no effective medications to treat AD. In this review, we first discuss the importance of Aß in the pathogenesis of AD, then summarize the latest progress of Aß-related targets and compounds. Finally, we put forward the challenges and opportunities in the development of effective AD therapies.


Asunto(s)
Enfermedad de Alzheimer , Enfermedades Neurodegenerativas , Humanos , Enfermedad de Alzheimer/patología , Péptidos beta-Amiloides/metabolismo , Precursor de Proteína beta-Amiloide/metabolismo , Secretasas de la Proteína Precursora del Amiloide/metabolismo
7.
Curr Drug Targets ; 23(15): 1430-1452, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36017847

RESUMEN

The leukocyte immunoglobulin (Ig)-like receptors (LILRs) are constituted by five inhibitory subpopulations (LILRB1-5) and six stimulatory subpopulations (LILRA1-6). The LILR populations substantially reside in immune cells, especially myeloid cells, functioning as a regulator in immunosuppressive and immunostimulatory responses, during which the nonclassical major histocompatibility complex (MHC) class I molecules are widely involved. In addition, LILRs are also distributed in certain tumor cells, implicated in the malignancy progression. Collectively, the suppressive Ig-like LILRB2 is relatively well-studied to date. Herein, we summarized the whole family of LILRs and their biologic function in various diseases upon ligation to the critical ligands, therefore providing more information on their potential roles in these pathological processes and giving the clinical significance of strategies targeting LILRs.


Asunto(s)
Leucocitos , Receptores Inmunológicos , Humanos , Receptor Leucocitario Tipo Inmunoglobulina B1 , Ligandos , Inmunoglobulinas
8.
Acta Pharm Sin B ; 12(4): 1781-1804, 2022 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-35847506

RESUMEN

Glioblastoma (GBM) is the most common aggressive malignant tumor in brain neuroepithelial tumors and remains incurable. A variety of treatment options are currently being explored to improve patient survival, including small molecule inhibitors, viral therapies, cancer vaccines, and monoclonal antibodies. Among them, the unique advantages of small molecule inhibitors have made them a focus of attention in the drug discovery of glioblastoma. Currently, the most used chemotherapeutic agents are small molecule inhibitors that target key dysregulated signaling pathways in glioblastoma, including receptor tyrosine kinase, PI3K/AKT/mTOR pathway, DNA damage response, TP53 and cell cycle inhibitors. This review analyzes the therapeutic benefit and clinical development of novel small molecule inhibitors discovered as promising anti-glioblastoma agents by the related targets of these major pathways. Meanwhile, the recent advances in temozolomide resistance and drug combination are also reviewed. In the last part, due to the constant clinical failure of targeted therapies, this paper reviewed the research progress of other therapeutic methods for glioblastoma, to provide patients and readers with a more comprehensive understanding of the treatment landscape of glioblastoma.

9.
Ying Yong Sheng Tai Xue Bao ; 33(4): 981-987, 2022 Apr.
Artículo en Chino | MEDLINE | ID: mdl-35543050

RESUMEN

Potassium (K) is the second most abundant nutrient in plant leaves after nitrogen (N) and the most abundant cation in plant cells. It plays an important role in plant growth regulation, homeostasis maintenance, and stress response. Previous studies on the effects of N input on plant nutrient status mainly focus on N and phosphorus (P), but less on K and its stoichiometry. We examined the effects of N input and mowing on K content and N:K at both plant functional group and community levels. We analyzed the relative contribution of changes in functional groups and community composition to changes of community level nutrition status. The results showed that N input increased N content of each plant functional group and increased K content of rhizomatous grasses and legumes. Mowing reduced N content of rhizomatous grasses and bunchgrass, but did not affect K content and N:K of all functional groups. Nitrogen input significantly increased plant N and K contents at the community level, while mowing significantly increased plant N content. Both N input and mowing did not affect plant N:K at functional group and community levels. The contribution of nutritional changes in plant functional groups to the variation at the community level was greater than that of changes in community composition. For all the three examined nutritional traits, the contribution of nutrients at functional group level and that of community composition showed negative covariation. Our results indicated that plant N:K had high homeostasis in meadow steppe and that plants could regulate N and K balance, which was of great significance for maintaining N:K stoichiometry under the background of increasing N deposition.


Asunto(s)
Pradera , Nitrógeno , China , Ecosistema , Nitrógeno/análisis , Fósforo , Plantas , Poaceae , Potasio , Suelo
10.
Adv Sci (Weinh) ; 9(15): e2103619, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35343115

RESUMEN

Despite the efficacy demonstrated by immunotherapy recently, liver cancer still remains one of the deadliest cancers, mainly due to heterogeneity of this disease. Continuous exploration of new therapeutics is therefore necessary. Chemical-induced cell differentiation can serve as a promising approach, with its ability to consistently remodel gene expression profile and alter cell fate. Inspired by advances in stem cell and reprogramming field, here it is reported that a small molecule cocktail (SMC) consisted of: SB431542 (TGFß inhibitor), CHIR99021 (GSK3ß inhibitor), BIX01294 (H3K9 methyltransferase/G9a inhibitor), and all-trans retinoic acid (ATRA), can induce differentiation of liver cancer cells including cell lines, primary cancer cells, cancer stem cells, and drug resistant cells. Treated cells lose malignant characteristics and regain hepatocyte phenotype instead. When applied in vivo, SMC induces wide range of tissue necrosis or fibrosis within the tumors, while remaining tissues begin to express hepatic nuclear factor 4α (HNF4α), the hepatic nuclear marker. SMC also leads to tumor abrogation in orthotopic xenograft models and life span extension of animals. The powerful differentiation induction of SMC is exerted through modulation of Akt/mTOR/HIF1α signaling and metabolic reprogramming, as well as suppressing Snail and enhancing HNF4α expression. Together, these results highlight that chemical-induced differentiation has the potential to effectively treat liver cancer disregard of heterogeneity.


Asunto(s)
Factor Nuclear 4 del Hepatocito , Neoplasias Hepáticas , Animales , Diferenciación Celular , Factor Nuclear 4 del Hepatocito/genética , Hepatocitos/metabolismo , Hepatocitos/patología , Humanos , Neoplasias Hepáticas/tratamiento farmacológico , Neoplasias Hepáticas/genética , Tretinoina/metabolismo
11.
Bull Menninger Clin ; 85(3): 254-270, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34468214

RESUMEN

Sleep problems among frontline medical staff during the COVID-19 epidemic require attention. A total of 249 frontline medical staff who were recruited to support Wuhan completed this cross-sectional study. A web-based questionnaire about insomnia, depression, anxiety, and fatigue was used to assess mental health status. The prevalence of sleep disorders among frontline medical staff was 50.6%. More time spent in Wuhan and a history of insomnia, depression, anxiety, and fatigue were associated with a higher risk of insomnia. People who stayed in Wuhan for a long time with a history of insomnia, depression, anxiety, and fatigue symptoms might be at high risk of insomnia.


Asunto(s)
Adaptación Psicológica , COVID-19/psicología , Cuerpo Médico de Hospitales/psicología , Trastornos Mentales/epidemiología , Trastornos del Sueño-Vigilia/epidemiología , Adulto , China , Comorbilidad , Estudios Transversales , Femenino , Humanos , Masculino , Cuerpo Médico de Hospitales/estadística & datos numéricos , Trastornos Mentales/psicología , SARS-CoV-2 , Trastornos del Sueño-Vigilia/psicología , Estrés Psicológico/epidemiología , Estrés Psicológico/psicología , Encuestas y Cuestionarios , Factores de Tiempo
12.
Bull Menninger Clin ; : 1-17, 2021 May 03.
Artículo en Inglés | MEDLINE | ID: mdl-33939498

RESUMEN

Sleep problems among frontline medical staff during the COVID-19 epidemic require attention. A total of 249 frontline medical staff who were recruited to support Wuhan completed this cross-sectional study. A web-based questionnaire about insomnia, depression, anxiety, and fatigue was used to assess mental health status. The prevalence of sleep disorders among frontline medical staff was 50.6%. More time spent in Wuhan and a history of insomnia, depression, anxiety, and fatigue were associated with a higher risk of insomnia. People who stayed in Wuhan for a long time with a history of insomnia, depression, anxiety, and fatigue symptoms might be at high risk of insomnia.

13.
Sci Rep ; 11(1): 1646, 2021 01 18.
Artículo en Inglés | MEDLINE | ID: mdl-33462317

RESUMEN

The physicochemical properties of chitosan obtained from the shells of swimming crab (Portunus trituberculatus) and prepared via subcritical water pretreatment were examined. At the deacetylation temperature of 90 °C, the yield, ash content, and molecular weight of chitosan in the shells prepared via subcritical water pretreatment were 12.2%, 0.6%, and 1187.2 kDa, respectively. These values were lower than those of shells prepared via sodium hydroxide pretreatment. At the deacetylation temperature of 120 °C, a similar trend was observed in chitosan molecular weight, but differences in chitosan yield and ash content were not remarkable. At the same deacetylation temperature, the structures of chitosan prepared via sodium hydroxide and subcritical water pretreatments were not substantially different. However, the compactness and thermal stability of chitosan prepared via sodium hydroxide pretreatment was lower than those of chitosan prepared via subcritical water pretreatment. Compared with the chitosan prepared by sodium hydroxide pretreatment, the chitosan prepared by subcritical water pretreatment was easier to use in preparing oligosaccharides, including (GlcN)2, via enzymatic hydrolysis with chitosanase. Results suggested that subcritical water pretreatment can be potentially used for the pretreatment of crustacean shells. The residues obtained via this method can be utilized to prepare chitosan.


Asunto(s)
Exoesqueleto/química , Braquiuros/química , Quitina/química , Quitosano/química , Agua/química , Exoesqueleto/metabolismo , Animales , Braquiuros/metabolismo , Quitina/metabolismo , Quitosano/metabolismo , Glicósido Hidrolasas/metabolismo , Concentración de Iones de Hidrógeno , Peso Molecular , Temperatura
14.
New Phytol ; 229(1): 296-307, 2021 01.
Artículo en Inglés | MEDLINE | ID: mdl-32762047

RESUMEN

The continuing nitrogen (N) deposition observed worldwide alters ecosystem nutrient cycling and ecosystem functioning. Litter decomposition is a key process contributing to these changes, but the numerous mechanisms for altered decomposition remain poorly identified. We assessed these different mechanisms with a decomposition experiment using litter from four abundant species (Achnatherum sibiricum, Agropyron cristatum, Leymus chinensis and Stipa grandis) and litter mixtures representing treatment-specific community composition in a semi-arid grassland under long-term simulation of six different rates of N deposition. Decomposition increased consistently with increasing rates of N addition in all litter types. Higher soil manganese (Mn) availability, which apparently was a consequence of N addition-induced lower soil pH, was the most important factor for faster decomposition. Soil C : N ratios were lower with N addition that subsequently led to markedly higher bacterial to fungal ratios, which also stimulated litter decomposition. Several factors contributed jointly to higher rates of litter decomposition in response to N deposition. Shifts in plant species composition and litter quality played a minor role compared to N-driven reductions in soil pH and C : N, which increased soil Mn availability and altered microbial community structure. The soil-driven effect on decomposition reported here may have long-lasting impacts on nutrient cycling, soil organic matter dynamics and ecosystem functioning.


Asunto(s)
Ecosistema , Nitrógeno , Pradera , Hojas de la Planta , Plantas , Poaceae , Suelo
15.
Dose Response ; 18(2): 1559325820938526, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32636723

RESUMEN

Alzheimer disease (AD) is the most common form of dementia characterized by the loss of cognitive abilities through the death of central neuronal cells. In this study, structure-based virtual screens of 2 central nervous system-targeted libraries followed by molecular mechanics/generalized born surface area rescoring were performed to discover novel, selective butyrylcholinesterase (BChE) inhibitors, which are one of the most effective therapeutic strategies for the treatments in late-stage AD. Satisfyingly, compound 5 was identified as a highly selective low micromolar inhibitor of BChE (BChE IC50 = 1.4 µM). The binding mode prediction and kinetic analysis were performed to obtain detailed information about compound 5. Besides, a preliminary structure-activity relationship investigation of compound 5 was carried out for further development of the series. The present results provided a valuable chemical template with a novel scaffold for the development of selective BChE inhibitors.

16.
Brain Behav Immun ; 89: 587-593, 2020 10.
Artículo en Inglés | MEDLINE | ID: mdl-32681866

RESUMEN

OBJECTIVE: To evaluate the mental health status of hospitalized patients with coronavirus disease 2019 (COVID-19) and to explore the related factors. METHOD: This was a cross-sectional survey among COVID-19 inpatients in two isolation wards of a designated hospital in Wuhan, China, from March 7, 2020, to March 24, 2020. Participants' demographic data, clinical data and levels of circulating inflammatory markers were collated. Mental health symptoms were evaluated with questionnaires, which included the Insomnia Severity Index (ISI) scale, the 9-item Patient Health Questionnaire (PHQ-9), the 7-item Generalized Anxiety Disorder (GAD-7) scale, and questions about patients' self-perceived illness severity. Multivariate linear regression analysis was performed to explore factors that associated with mental symptoms, and a structural equation model (SEM) was used to assess the possible relationships between those factors and the patients' mental health. RESULTS: Among the 85 participants, 45.9% had symptoms of depression (PHQ-9 ≥ 5), 38.8% had anxiety (GAD-7 ≥ 5), and 54.1% had insomnia (ISI ≥ 8). According to multivariate regression analysis, female sex, a higher level of interleukin (IL)-1ß and greater self-perceived illness severity were all significantly associated with a higher PHQ-9 score, higher GAD-7 score and higher ISI score. In addition, the disease duration and the neutrophil to lymphocyte ratio (NLR) were positively related to patients' self-perceived illness severity. The results of the SEM analyses suggested that sex (ß = 0.313, P < 0.001), self-perceived illness severity (ß = 0.411, P < 0.001) and levels of inflammatory markers (ß = 0.358, P = 0.002) had direct effects on patients' mental health. The disease duration (ß = 0.163, P = 0.003) and levels of inflammatory markers (ß = 0.101, P = 0.016) also indirectly affected patients' mental health, with self-perceived illness severity acting as a mediator. CONCLUSION: A majority of COVID-19 infected inpatients reported experiencing mental health disturbances. Female sex, disease duration, levels of inflammatory markers and self-perceived illness severity are factors that could be used to predict the severity of patients' mental symptoms.


Asunto(s)
Ansiedad/psicología , Infecciones por Coronavirus/psicología , Depresión/psicología , Hospitalización , Neumonía Viral/psicología , Trastornos del Inicio y del Mantenimiento del Sueño/psicología , Adulto , Ansiedad/epidemiología , Ansiedad/inmunología , Betacoronavirus , COVID-19 , China/epidemiología , Infecciones por Coronavirus/epidemiología , Infecciones por Coronavirus/inmunología , Estudios Transversales , Depresión/epidemiología , Depresión/inmunología , Femenino , Humanos , Inflamación , Recuento de Leucocitos , Recuento de Linfocitos , Masculino , Salud Mental , Persona de Mediana Edad , Neutrófilos , Pandemias , Cuestionario de Salud del Paciente , Neumonía Viral/epidemiología , Neumonía Viral/inmunología , SARS-CoV-2 , Índice de Severidad de la Enfermedad , Factores Sexuales , Trastornos del Inicio y del Mantenimiento del Sueño/epidemiología , Trastornos del Inicio y del Mantenimiento del Sueño/inmunología , Factores de Tiempo
17.
Ying Yong Sheng Tai Xue Bao ; 30(11): 3903-3910, 2019 Nov.
Artículo en Chino | MEDLINE | ID: mdl-31833704

RESUMEN

Nematodes, occupying multiple trophic levels in the food web, play important roles in energy flow and nutrient cycling. Most of Chinese natural grasslands have been degraded due to long-term unreasonable utilization, such as over-grazing. External nutrient input is an important way to restore the ecological function of degraded grasslands. The main and intertative effects of nitrogen and phosphorus inputs on soil nematode abundance, trophic group composition and community structure were studied in the grasslands in Xilingol League of Inner Mongolia. Totally, 38 genera of nematodes were recorded. Tylencholaimus, Aphelenchoides, Thonus, and Scutylenchus were dominant genera in this degraded grassland. Nitrogen input decreased total abundances of soil nematodes, and that of omnivores-carnivorous nematodes and plant-feeding nematodes. Phosphorus input increased total abundances of soil nematodes, and that of fungal-feeding nematodes, omnivores-carnivorous nematodes, and plant-feeding nematodes. Nitrogen input inhibited the positive effects of phosphorus input on the abundances of total nematodes, omnivores-carnivorous nematodes and plant-feeding nematodes. Nutrient inputs had no effect on nematode diversity, which would be resulted from the stable plant community. Nitrogen input significantly increased nematode maturity index, decreased plant parasitic nematode maturity index (PPI), and greatly alleviated the negative effects of phosphorus input on PPI and Wasilewska index, indicating that nitrogen input could improve soil health condition and the stability of nematodes community. Our results would help improve our understanding of the effects of nutrient inputs on degraded grassland ecosystem from a soil biotic perspective.


Asunto(s)
Nematodos , Suelo , Animales , China , Ecosistema , Pradera , Nitrógeno , Fósforo
18.
Clin Neurol Neurosurg ; 183: 105384, 2019 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-31229936

RESUMEN

OBJECTIVES: To investigate the risk factors and predictors of outcomes in a cohort of Chinese patients with cerebral venous sinus thrombosis (CVST), so as to provide a reference for customized clinical decision. PATIENTS AND METHODS: A total of 243 Chinese patients, diagnosed as a first CVST were enrolled in this retrospective study from March 2013 through April 2017. Risk factors and predictors of outcomes for CVST were summarized and analyzed by Chi-square test and logistic regression analysis. RESULTS: Of the 243 cases, obstetric cause (19.8%) was the leading risk factor for CVST, followed by infection (17.7%) and anemia (17.7%). Gender differences in the risk factors for CVST were analyzed, showing that obstetric cause was the top risk factor in female, while hyperhomocysteinemia (22.3%) was the top risk factor in male. In age subgroups, obstetric cause (26.3%) and anemia (17.6%) were more commonly observed in age ≤ 44 years and age > 44 years subgroup, respectively. The ratio of poor outcomes (mRS = 3-6) in this cohort was 23.0%, and central nervous system (CNS) infection was closely related to poor outcomes at discharge (p = 0.023). CONCLUSION: The predominant risk factor for CVST, in this Chinese cohort, may still be obstetric cause in female and hyperhomocysteinemia in male. In addition, CNS infection may predict poor outcomes in CVST patients.


Asunto(s)
Senos Craneales/cirugía , Hiperhomocisteinemia/cirugía , Factores Sexuales , Trombosis de los Senos Intracraneales/cirugía , Adulto , Pueblo Asiatico , Estudios de Cohortes , Senos Craneales/diagnóstico por imagen , Femenino , Humanos , Hiperhomocisteinemia/diagnóstico , Masculino , Persona de Mediana Edad , Estudios Retrospectivos , Factores de Riesgo , Trombosis de los Senos Intracraneales/diagnóstico
19.
Sci Total Environ ; 666: 887-893, 2019 May 20.
Artículo en Inglés | MEDLINE | ID: mdl-30818212

RESUMEN

AIMS: The stoichiometric characteristics of plant communities are important controller for several fundamental ecological processes. The effects of environmental changes on community stoichiometric characteristics are driven by intra- and inter-specific variation. However, the relative importance of both pathways has seldom been empirically examined. METHODS: We quantified the relative contribution of intra- and inter-specific variation to the changes of community nitrogen (N) and phosphorus (P) concentrations after seven-year factorial N addition and mowing treatments in a semi-arid grassland of northern China. RESULTS: Nitrogen addition significantly increased community N and P concentrations and N:P ratio. Mowing significantly increased community N concentration and N:P. Intra-specific variation contributed more than inter-specific variation to the total variability of all the nutritional and stoichiometric characteristics, with intra-specific variation accounting for 68%, 70%, and 75% of the total variation in community-level N, P, and N:P, respectively. Negative covariations between the contribution of intra- and inter-specific variation occurred for community N and P concentrations. Further, N addition and mowing interacted to affect the impacts of intra- and inter-specific variation on community N concentration and N:P stoichiometry. CONCLUSIONS: Our results highlight different ways of trait selection for N addition and mowing treatments. Interactions between those two factors make it more difficult to accurately predict the responses of plant-mediated biogeochemical cycles under co-occurrence of environmental changes.


Asunto(s)
Fertilizantes/análisis , Pradera , Nitrógeno/metabolismo , Plantas/metabolismo , China , Especificidad de la Especie
20.
CNS Neurosci Ther ; 25(5): 638-646, 2019 05.
Artículo en Inglés | MEDLINE | ID: mdl-30675757

RESUMEN

AIMS: The objective of this study was to evaluate cerebral venous recanalization with magnetic resonance black-blood thrombus imaging (MRBTI) in patients with cerebral venous thrombosis (CVT) who underwent batroxobin treatment in combination with anticoagulation. METHODS: A total of 31 CVT patients were enrolled in this real-world registry study. The patients were divided into batroxobin (n = 21) and control groups (n = 10). In addition to the same standard anticoagulation as in the control group, patients in the batroxobin group underwent intravenous batroxobin for a total of three times. RESULTS: In the batroxobin group compared with the control group, we found better odds of recanalization degree [adjusted OR (95%CI) of 8.10 (1.61-40.7)] and segment-stenosis attenuation [adjusted OR (95%CI) of 4.48 (1.69-11.9)] with batroxobin treatment. We further noted a higher ratio of patients with the attenuation of stenosis [adjusted OR (95%CI) of 26.4 (1.10-635)]; as well as a higher ratio of segments with stenosis reversion [adjusted OR (95%CI) of 4.52 (1.48-13.8)]. However, neurological deficits between the two groups showed no statistical difference at 90-day follow-up (P > 0.05). CONCLUSIONS: Batroxobin may promote venous sinus recanalization and attenuate CVT-induced stenosis. Further randomized study of this promising drug may be warranted to better delineate the amount of benefit.


Asunto(s)
Anticoagulantes/uso terapéutico , Batroxobina/uso terapéutico , Fibrinolíticos/uso terapéutico , Trombosis Intracraneal/tratamiento farmacológico , Trombosis de la Vena/tratamiento farmacológico , Adulto , Constricción Patológica/diagnóstico por imagen , Constricción Patológica/tratamiento farmacológico , Quimioterapia Combinada , Femenino , Humanos , Trombosis Intracraneal/diagnóstico por imagen , Imagen por Resonancia Magnética , Masculino , Sistema de Registros , Resultado del Tratamiento , Trombosis de la Vena/diagnóstico por imagen
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