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1.
Phytomedicine ; 127: 155487, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38490078

RESUMEN

AIM: To extend and form the "Grading of Recommendations Assessment, Development and Evaluation in Traditional Chinese Medicine" (GRADE-TCM). METHODS: Methodologies were systematically reviewed and analyzed concerning evidence-based TCM guidelines worldwide. A survey questionnaire was developed based on the literature review and open-end expert interviews. Then, we performed expert consensus, discussion meeting, opinion collection, external examination, and the GRADE-TCM was formed eventually. RESULTS: 265 Chinese and English TCM guidelines were included and analyzed. Five experts completed the open-end interviews. Ten methodological entries were summarized, screened and selected. One round of consensus was conducted, including a total of 22 experts and 220 valid questionnaire entries, concerning 1) selection of the GRADE, 2) GRADE-TCM upgrading criteria, 3) GRADE-TCM evaluation standard, 4) principles of consensus and recommendation, and 5) presentation of the GRADE-TCM and recommendation. Finally, consensus was reached on the above 10 entries, and the results were of high importance (with voting percentages ranging from 50 % to 81.82 % for "very important" rating) and strong reliability (with the Cr ranging from 0.93 to 0.99). Expert discussion meeting (with 40 experts), opinion collection (in two online platforms) and external examination (with 14 third-party experts) were conducted, and the GRADE-TCM was established eventually. CONCLUSION: GRADE-TCM provides a new extended evidence-based evaluation standard for TCM guidelines. In GRADE-TCM, international evidence-based norms, characteristics of TCM intervention, and inheritance of TCM culture were combined organically and followed. This is helpful for localization of the GRADE in TCM and internationalization of TCM guidelines.


Asunto(s)
Medicina Basada en la Evidencia , Medicina Tradicional China , Medicina Tradicional China/métodos , Reproducibilidad de los Resultados , Encuestas y Cuestionarios
2.
Acta Pharmaceutica Sinica ; (12): 1383-1394, 2023.
Artículo en Chino | WPRIM | ID: wpr-978679

RESUMEN

Glycogen synthase kinase 3/SHAGGY-like kinase (GSK3) proteins play important roles in regulating plant growth, development, and stress response. In order to reveal the characteristics of GSK family members in the medicinal plant Senna tora L., in this study, we conducted the identification and expression analyses of GSKs in S. tora based on its whole genome data, combined with bioinformatics and gene expression research methods. The results showed that a total of nine S. tora GSK genes were identified, all of which contained the GSK characteristic kinase domains. All members were distributed on six chromosomes, the encoding amino acid length ranged from 465 to 943 aa, the protein molecular weight was from 33.57 to 88.83 kDa, and the average isoelectric point was 8.2. The StoSKs were divided into four evolutionary branches, and the StoSKs in the same evolutionary branch shared the same exon/intron structure and conserved motifs. The expansion of the StoSKs gene family was mainly due to segment duplication events, and there were 17, 11, 8 and 7 pairs of collinear genes with Glycine max, Medicago truncatula, Arabidopsis thaliana and Oryza sativa, respectively. The promoter regions of StoSKs mostly contained responses elements related to stress stimulation, growth and development, and hormone induction. Transcriptome data analysis showed that StoSKs were expressed in different tissues, with the highest expression level in roots. Quantitative real-time PCR (qRT-PCR) analysis indicated that StoSKs in different evolutionary branches displayed a synergistic expression pattern response to light, and most of StoSKs could rapidly respond to NaCl stress with significantly up-regulated expression. All the results provide a basis for further analysis of the biological functions of the GSKs gene family in S. tora.

3.
Bioresour Technol ; 369: 128462, 2023 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-36503087

RESUMEN

This study evaluated the compostability of rice straw as the main feedstock (75 % in dry weight), supplemented with three different nitrogen-rich wastes, namely food waste (FW), dairy manure (DM), and sewage sludge (SS). Organic matter (OM) degradation, maturity and fertility of the end-product, and bacterial community structure during the composting processes were compared. All composting processes generated mature end-product within 51 days. Notably, FW addition was more effective to accelerate rice straw OM degradation and significantly improved end-product fertility with a high yield of Chinese cabbage. The succession of the bacterial community was accelerated with FW supplementation. Genera Geobacillus, Chryseolinea, and Blastocatella were significantly enriched during the composting of rice straw with FW supplementation. Finally, temperature, total nitrogen, moisture, pH, and total carbon were the key factors affecting microorganisms. This study provides a promising alternative method to enhance the disposal of larger amounts of rice straw in a shorter time.


Asunto(s)
Compostaje , Oryza , Eliminación de Residuos , Nitrógeno/metabolismo , Oryza/metabolismo , Suelo/química , Bacterias/metabolismo , Estiércol/microbiología , Suplementos Dietéticos , Aguas del Alcantarillado
4.
J Pharm Pharmacol ; 74(11): 1507-1545, 2022 Nov 04.
Artículo en Inglés | MEDLINE | ID: mdl-36179124

RESUMEN

OBJECTIVES: Crataegus pinnatifida (C. pinnatifida), including C. pinnatifida Bge. and its variant C. pinnatifida Bge. var. major N, E. Br., has traditionally been used as a homologous plant for traditional medicine and food in ethnic medical systems in China. Crataegus pinnatifida, especially its fruit, has been used for more than 2000 years to treat indigestion, stagnation of meat, hyperlipidemia, blood stasis, heart tingling, sores, etc. This review aimed to provide a systematic summary on the botany, traditional uses, phytochemistry, pharmacology and clinical applications of C. pinnatifida. KEY FINDINGS: This plant contains flavonoids, phenylpropanoids, terpenoids, organic acids, saccharides and essential oils. Experimental studies showed that it has hypolipidemic, antimyocardial, anti-ischemia, antithrombotic, anti-atherosclerotic, anti-inflammatory, antineoplastic neuroprotective activity, etc. Importantly, it has good effects in treating diseases of the digestive system and cardiovascular and cerebrovascular systems. SUMMARY: There is convincing evidence from both in vitro and in vivo studies supporting the traditional uses of C. pinnatifida. However, multitarget network pharmacology and molecular docking technology should be used to study the interaction between the active ingredients and targets of C. pinnatifida. Furthermore, exploring the synergy of C. pinnatifida with other Chinese medicines to provide new understanding of complex diseases may be a promising strategy.


Asunto(s)
Botánica , Crataegus , Crataegus/química , Simulación del Acoplamiento Molecular , Flavonoides/química , Frutas/química , Medicina Tradicional China
5.
J Environ Manage ; 324: 116288, 2022 Dec 15.
Artículo en Inglés | MEDLINE | ID: mdl-36179476

RESUMEN

The slope-gully system, the erosion unit on the Loess Plateau, suffers from severe soil erosion and loss of soil nutrients. Restoring vegetation can effectively reduce soil erosion, thereby reducing the loss of nitrogen and phosphorus. In the Loess Plateau, owing to the shortage of water resources and the adverse effects of over-revegetation, the restoration of vegetation in large areas is limited. To efficiently prevent the loss of soil nutrients and reduce non-point source pollution, vegetation patterns need to be reasonably restored. However, it is currently not clear as to how this can be achieved. Different slope-gully systems were established in this study, including pattern A (no vegetation), pattern B (up-slope vegetation), pattern C (middle-slope vegetation), and pattern D (down-slope vegetation). Then, the effects of vegetation patterns on soil total nitrogen (TN) and soil total phosphorus (TP) losses associated with runoff and sediment processes was quantitatively evaluated through the simulated rainfall. The results showed that (1) vegetation pattern markedly affected the yields of runoff, sediment, soil nitrogen, and soil phosphorus, resulting in the following order: pattern A > pattern B > pattern C > pattern D. (2) The correlation between TN and runoff was higher than that between TN and sediment; conversely, TP was more strongly correlated with sediment than with runoff. (3) Nitrogen loss with runoff was the main source of TN (58.76-90.74%), while phosphorus loss with sediment was the main source of TP (48.51-89.30%). Compared with other vegetation patterns, the down-slope can more effectively reduce the yields of runoff and sediment, thereby reducing the loss of TN and TP. Therefore, it was suggested that the lower part of the slope should be considered when revegetating.


Asunto(s)
Fósforo , Suelo , Fósforo/análisis , Nitrógeno/análisis , Monitoreo del Ambiente/métodos , China
6.
Immunity ; 55(8): 1466-1482.e9, 2022 08 09.
Artículo en Inglés | MEDLINE | ID: mdl-35863346

RESUMEN

Although many studies have addressed the regulatory circuits affecting neuronal activities, local non-synaptic mechanisms that determine neuronal excitability remain unclear. Here, we found that microglia prevented overactivation of pre-sympathetic neurons in the hypothalamic paraventricular nucleus (PVN) at steady state. Microglia constitutively released platelet-derived growth factor (PDGF) B, which signaled via PDGFRα on neuronal cells and promoted their expression of Kv4.3, a key subunit that conducts potassium currents. Ablation of microglia, conditional deletion of microglial PDGFB, or suppression of neuronal PDGFRα expression in the PVN elevated the excitability of pre-sympathetic neurons and sympathetic outflow, resulting in a profound autonomic dysfunction. Disruption of the PDGFBMG-Kv4.3Neuron pathway predisposed mice to develop hypertension, whereas central supplementation of exogenous PDGFB suppressed pressor response when mice were under hypertensive insult. Our results point to a non-immune action of resident microglia in maintaining the balance of sympathetic outflow, which is important in preventing cardiovascular diseases.


Asunto(s)
Hipertensión , Microglía , Animales , Hipertensión/metabolismo , Ratones , Neuronas/fisiología , Potasio/metabolismo , Proteínas Proto-Oncogénicas c-sis/metabolismo , Receptor alfa de Factor de Crecimiento Derivado de Plaquetas/metabolismo
7.
Adv Drug Deliv Rev ; 188: 114457, 2022 09.
Artículo en Inglés | MEDLINE | ID: mdl-35843507

RESUMEN

Since the successful introduction of exogenous photosensitive proteins, channelrhodopsin, to neurons, optogenetics has enabled substantial understanding of profound brain function by selectively manipulating neural circuits. In an optogenetic system, optical stimulation can be precisely delivered to brain tissue to achieve regulation of cellular electrical activity with unprecedented spatio-temporal resolution in living organisms. In recent years, the development of various optical actuators and novel light-delivery techniques has greatly expanded the scope of optogenetics, enabling the control of other signal pathways in non-neuronal cells for different biomedical applications, such as phototherapy and immunotherapy. This review focuses on the recent advances in optogenetic regulation of cellular activities for photomedicine. We discuss emerging optogenetic tools and light-delivery platforms, along with a survey of optogenetic execution in mammalian and microbial cells.


Asunto(s)
Encéfalo/fisiología , Mamíferos/fisiología , Neuronas , Optogenética/tendencias , Animales , Channelrhodopsins/metabolismo , Humanos , Microbiota/fisiología , Neuronas/metabolismo , Optogenética/métodos , Fototerapia/tendencias , Transducción de Señal
8.
Nutr Metab (Lond) ; 19(1): 36, 2022 May 18.
Artículo en Inglés | MEDLINE | ID: mdl-35585561

RESUMEN

BACKGROUND: In hospitalized patients, drug side effects usually trigger intestinal mucositis (IM), which in turn damages intestinal absorption and reduces the efficacy of treatment. It has been discovered that natural polysaccharides can relieve IM. In this study, we extracted and purified homogenous polysaccharides of Wuguchong (HPW), a traditional Chinese medicine, and explored the protective effect of HPW on 5-fluorouracil (5-FU)-induced IM. METHODS AND RESULTS: First, we identified the physical and chemical properties of the extracted homogeneous polysaccharides. The molecular weight of HPW was 616 kDa, and it was composed of 14 monosaccharides. Then, a model of small IM induced by 5-FU (50 mg/kg) was established in mice to explore the effect and mechanism of HPW. The results showed that HPW effectively increased histological indicators such as villus height, crypt depth and goblet cell count. Moreover, HPW relieved intestinal barrier indicators such as D-Lac and diamine oxidase (DAO). Subsequently, western blotting was used to measure the expression of Claudin-1, Occludin, proliferating cell nuclear antigen, and inflammatory proteins such as NF-κB (P65), tumour necrosis factor-α (TNF-α), and COX-2. The results also indicated that HPW could reduce inflammation and protect the barrier at the molecular level. Finally, we investigated the influence of HPW on the levels of short-chain fatty acids, a metabolite of intestinal flora, in the faeces of mice. CONCLUSIONS: HPW, which is a bioactive polysaccharide derived from insects, has protective effects on the intestinal mucosa, can relieve intestinal inflammation caused by drug side effects, and deserves further development and research.

9.
Artículo en Inglés | MEDLINE | ID: mdl-35600957

RESUMEN

The present study was clarified the relationship between NG2 glial cells and 5-hydroxytryptamine (5-HT) to further revealed a role in the regulation of cortical excitability. The co-localization of NG2 cells and 5-HT in rat prefrontal cortex was determined using immunofluorescence. Different concentrations of 5-HT were applied to cultured NG2 cells. Real-time PCR measured the expression of interleukin-1ß (IL-1ß), tumor necrosis factor-α (TNF-α) and brain-derived neurotrophic factor (BDNF). Changes in the expression of IL-1ß, TNF-α, and BDNF in NG2 cells were detected after the addition of 5-HT receptor specific blockers and phospholipase C (PLC) specific activators and inhibitors. The results confirmed that the NG2 protein and 5-HT co-localized in the prefrontal cortex. 5-HT treatment of NG2 cells significantly reduced the expression of IL-1ß and BDNF mRNA and increased the expression of TNF-α. The 5-HT receptor specific inhibitors alverine citrate, ketanserin, ondansetron and SB-399885 blocked the regulatory effects of 5-HT on NG2 cells. The PLC signal was linked to the secretion of IL-1ß, TNF-α and BDNF in NG2 cells. These results indicated that 5-HT affected IL-1ß, TNF-α, and BDNF secretion from NG2 cells via the 5-HT1A, 5-HT2A, 5-HT3, 5-HT6 receptors and the PLC signaling pathway.

10.
J Ethnopharmacol ; 284: 114733, 2022 Feb 10.
Artículo en Inglés | MEDLINE | ID: mdl-34644589

RESUMEN

ETHNOPHARMACOLOGICAL RELEVANCE: Kidney stones is one of the common diseases of the urinary system. The primary cause of kidney stone formation is the thermodynamic supersaturation of lithogenic solutes in urine, which desaturates by nucleation, crystal growth and aggregation of minerals and salts, mainly Calcium oxalate (CaOx). One of the potential therapies is to develop drug molecules to inhibit or prevent CaOx crystallization in urine. Traditional Chinese medicines (TCMs) provided an efficient approach for the treatment of kidney stones with a specialized-designed recipe of medicinal herbs. But the action details of these herbs were poorly understood due to their complex components, and whether the effective constituents of herbs have an inhibitory effect on the process of stone formation has not been evaluated. AIM OF THE STUDY: This study aims to develop and identify inhibitor substitutes from a library of kidney stone prescriptions in traditional Chinese medicines to prevent pathological kidney stone formation. MATERIALS AND METHODS: As many as twenty Chinese medicines were extracted and separated into five different polar extracts, the inhibition performance of which on CaOx crystallization was explored by recording and comparing crystallization kinetics. The potential inhibitor molecules in the inhibitory extracts were confirmed by HPLC and their retardation efficacy was evaluated by quantifying nucleation and growth kinetics using colorimetry. Then the inhibitor-COM crystal interactions and specificity were examined by morphology evolution and surface structure analysis. In vitro inhibition performance of inhibitors on crystal growth and attachment of CaOx crystals to human renal epithelial cells were further evaluated by recording the nucleation and adhesive crystal numbers. RESULTS AND CONCLUSION: Water- and n-butanol- soluble extracts from 20 kinds of herbs show almost 100% inhibition percentage, and the n-butanol extracts was found better than commercial drug citrate. Twenty-one molecule substitutes were identified from these extracts, and among them polyphenols display the best inhibition efficacy to retard CaOx crystallization. The high-throughput colorimetric assay and morphology examinations reveals thirteen out of 21 molecules show inhibition potential and disrupt growth of CaOx monohydrate crystals by interacting with exposed Ca2+ and C2O42- on the (100) and (010) surfaces. Moreover, these inhibitors also display pronounced performance in protecting renal epithelial cells by inhibiting nucleation and adhesion of CaOx crystals to cells, thus reducing stone formation. The structure-performance correlation among 19 screened molecules that inhibitors having pKa<3.5, logD (pH = 6) <0, H-number>0.1 mmol are the best in suppressing CaOx crystallization. Our findings provide a novel solution to design and manufacture inhibitor drugs from Chinese medicines for preventing pathological kidney stones formation.


Asunto(s)
Oxalato de Calcio/orina , Medicamentos Herbarios Chinos/farmacología , Células Epiteliales/efectos de los fármacos , Cálculos Renales/prevención & control , Cristalización , Ensayos Analíticos de Alto Rendimiento , Humanos , Técnicas In Vitro , Riñón/citología , Riñón/efectos de los fármacos , Medicina Tradicional China/métodos , Plantas Medicinales/química
11.
Small ; 18(8): e2105388, 2022 02.
Artículo en Inglés | MEDLINE | ID: mdl-34894073

RESUMEN

Neurons can be modified to express light-sensitive proteins for enabling stimulation with a high spatial and temporal resolution, but such techniques require gene transfection and systematical implantation. Here, a black phosphorus nanosheet-based injectable strategy is described for wireless neural stimulation both in vitro and in vivo without cell modifications. These nanosheets, with minimal invasiveness, high biocompatibility, and biodegradability, are anchored on cell membranes as miniature near-infrared (NIR) light transducers to create local heating for neural activity excitation. Based on cultured multielectrode-array recording, in vivo electrophysiology analysis, and open field behavioral tests, it is demonstrated that remotely applied NIR illumination can reliably trigger spiking activity in cultured neurons and rat brains. Excitingly, reliable regulation of brain function to control animal behaviors is also described. Moreover, this approach has shown its potential for future clinical use by successful high-frequency stimulation in cells and animals in this proof-of-concept study. It is believed that this new method will offer a powerful alternative to other neural stimulation solutions and potentially be of independent value to the healthcare system.


Asunto(s)
Sistemas de Liberación de Medicamentos , Fósforo , Animales , Neuronas , Ratas
12.
Trials ; 22(1): 53, 2021 Jan 12.
Artículo en Inglés | MEDLINE | ID: mdl-33436053

RESUMEN

BACKGROUND: Upper limb and hand motor dysfunction is one of the challenges in rehabilitation after cerebral ischemic stroke (CIS), and the clinical efficacy of rehabilitation needs to be improved. This study aims to combine Jin's three-needle acupuncture (JTN) therapy with mirror therapy (MT) for hemiplegia after CIS, objectively evaluate the clinical effects and safety of JTN to treat upper limb dysfunction, and use functional magnetic resonance imaging (fMRI) of the brain to investigate the central mechanisms of the effects, which would provide a powerful evidence-based medical basis for further supporting the application of JTN combined with MT. METHODS/DESIGN: This trial will be a single-blind, randomized controlled study. Patients who meet the study criteria will be recruited and randomly assigned to either the combined treatment group (JTN+MT) or the JTN group. Both interventions will be conducted for 6 days per week and last for 4 weeks. The primary outcome will be the effective rate based on the Fugl-Meyer Assessment for Upper Extremity (FMA-UE). Other outcome measures will include scores on the motor assessment scale (MAS), action research arm test (ARAT), activities of daily living (ADL) scale, and fMRI analyses. For safety evaluation, adverse events will be observed and recorded. DISCUSSION: This study may help to identify the efficacy and safety of acupuncture combined with MT for upper limb dysfunction after CIS and explore the central mechanisms with brain fMRI. TRIAL REGISTRATION: Chinese Clinical Trial Registry ChiCTR-IOR-17012174 . Registered on 5 April 2017.


Asunto(s)
Terapia por Acupuntura , Isquemia Encefálica , Accidente Cerebrovascular Isquémico , Rehabilitación de Accidente Cerebrovascular , Accidente Cerebrovascular , Actividades Cotidianas , Terapia por Acupuntura/efectos adversos , Encéfalo/diagnóstico por imagen , Isquemia Encefálica/diagnóstico por imagen , Isquemia Encefálica/terapia , Humanos , Imagen por Resonancia Magnética , Ensayos Clínicos Controlados Aleatorios como Asunto , Método Simple Ciego , Accidente Cerebrovascular/diagnóstico por imagen , Accidente Cerebrovascular/terapia , Resultado del Tratamiento , Extremidad Superior
13.
Environ Technol ; 42(18): 2896-2901, 2021 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-31941432

RESUMEN

Choline-based deep eutectic solvents (DESs) have many outstanding features as they are easy to prepare, inexpensive, low-toxic, low volatile, and biodegradable, which make them increasingly attractive in industrial chemistry and green chemistry. In this paper, the abilities of three different kinds of DESs for crude oil removal from contaminated soils were compared and it was found the DES formed by phenylpropionic acid and choline chloride (mole ratio = 2:1) had the best performance. The effects of extraction time, temperature and the solvent-soil ratio on phenylpropionic acid/choline chloride DES performance were evaluated. The rational extraction conditions were recommended as follows: mass ratio of DES to soil was 10:1 and 60 min extraction time at 80°C. The extraction (desorption) process could be described by Freundlich desorption isotherm mode. In addition, the phenylpropionic acid/choline chloride DES could be recycled and the oil removal efficiency was about 90% after 10 cycles. This finding suggested that choline-based DES extraction was a promising technology for crude oil removal from contaminated soil.


Asunto(s)
Colina , Petróleo , Extractos Vegetales , Suelo , Solventes
14.
Zhen Ci Yan Jiu ; 45(4): 287-92, 2020 Apr 25.
Artículo en Chino | MEDLINE | ID: mdl-32333533

RESUMEN

OBJECTIVE: To observe the effect of electroacupuncture (EA) at "Ashi" acupoint and "Kunlun" (BL60) on elastic modulus, histopathological changes and expression of myogenic regulatory factors in gastrocnemius(GM) contusion rats, so as to explore the therapeutic effect of local acupoint selection and acupoint selection along channel. METHODS: Male SD rats were randomly divided into blank control (n=5), model (n=15), Ashi-point (n=15) and BL60 (n=15) groups. The acute GM contusion model was established by striking (free falling) the GM with a homemade hitter. EA (0.5 to 1.0 mA, 2 Hz/10 Hz) was applied to Ashi-point (local focus) and BL60 for 30 min 24 h after muscle injury. The elasticity maximum (Emax) of gastrocnemius muscle was measured by using an ultrasonic device. Histopathological changes were observed after H.E. stain, and the number of Myogenic differentiation(MyoD)- and Myogenin (MyoG)-positive cells was detected by using immunohistochemistry. RESULTS: After mdeling, the Emax value of GM was significantly increased from the 3rd h to 7th day in comparison with pre- injury of muscle (P<0.05), and was markedly increased on the 3rd day and obviously lower on day 7 in the Ashi-point group than in the model group (P<0.05). The numbers of MyoD- and MyoG-positive cells of GM were significantly increased on day 7 in the model group than in the blank control group (P<0.05), and both further increased in Ashi-point on day 3 and 5, and MyoG-positive cells further increased in BL60 group on day 5 and in Ashi-point group on day 7 relevant to the model group(P<0.05). The therapeutic effect of EA-Ashi-point was apparently superior to that of BL60 in up-regulating Emax on day 3 and in up-regulating the number of MyoD-positive cells on day 3 and 5 (P<0.05). H.E. stain showed disordered arrangement of muscle fibers, infiltration of inflammatory cells, increase of intercellular space, and edema on day 3 after modeling (which was milder in the Ashi-point group); and gradual fusion and thickening of new born muscle fibers with obvious connective tissue hyperplasia converged to the lesioned region on day 7 in the model group (convergence of new born muscle cells to the lesion region in both EA groups, and more complete tissues in the Ashi-point group). CONCLUSION: EA of Ashi-point and BL60 can up-regulate the expression of myogenic regulatory factors MyoD and MyoG of GM tissue in GM contusion rats, which may contribute to its function in promoting recovery of muscle elasticity. The role of EA-Ashi-point is superior to that of EA-BL60.


Asunto(s)
Contusiones , Electroacupuntura , Puntos de Acupuntura , Animales , Elasticidad , Masculino , Músculo Esquelético , Miogenina , Ratas , Ratas Sprague-Dawley
15.
Nano Lett ; 20(5): 4043-4050, 2020 05 13.
Artículo en Inglés | MEDLINE | ID: mdl-32338928

RESUMEN

The development of new drugs requires high-throughput and cost-effective pharmacological assessment in relevant biological models. Here, we introduce a novel pharmacological screening platform that combines a biohybrid triboelectric nanogenerator (TENG) and informatic analysis for self-powered, noninvasive, and label-free biosensing in cardiac cells. The cyclic mechanical activity of functional cardiomyocytes is dynamically captured by a specially designed biohybrid TENG device and is analyzed by a custom-made machine learning algorithm to reveal distinctive fingerprints in response to different pharmacological treatment. The core of the TENG device is a multilayer mesh substrate with microscale-gapped triboelectric layers, which are induced to generate electrical outputs by the characteristic motion of cardiomyocytes upon pharmaceutical treatment. Later bioinformatic extraction from the recorded TENG signal is sufficient to predict a drug's identity and efficacy, demonstrating the great potential of this platform as a biocompatible, low-cost, and highly sensitive drug screening system.


Asunto(s)
Evaluación Preclínica de Medicamentos , Suministros de Energía Eléctrica , Miocitos Cardíacos/efectos de los fármacos , Nanotecnología , Animales , Células Cultivadas , Electricidad , Movimiento (Física)
16.
Huan Jing Ke Xue ; 40(9): 4023-4032, 2019 Sep 08.
Artículo en Chino | MEDLINE | ID: mdl-31854865

RESUMEN

Twelve lakes and reservoirs with different water depths and different water residence times were studied to identify the applicability of bioavailable phosphorus of sediments in indicating trophic levels. Water and sediment samples were collected in these 12 lakes and reservoirs to analyze the relationship of nutrient levels between the sediment and the water column. Sodium hydroxide extracted phosphorus (NaOH-P) determined using the SMT classification method is defined as the bioavailable phosphorus of sediment. The results showed that total phosphorus levels in sediments in different lakes and reservoirs ranged from 225 to 760 mg·kg-1 (mean value 502 mg·kg-1); the NaOH-P levels in sediments ranged from 86 to 584 mg·kg-1 (mean value 263 mg·kg-1); the total phosphorus concentrations in the water was 0.02-0.35 mg·L-1 (mean value 0.11 mg·L-1), and the chlorophyll a concentrations in the water were 3-349 µg·L-1 (mean value 51 µg·L-1). It was found that NaOH-P was more effective than total phosphorus in indicating the trophic status of the lakes and reservoirs. However, the NaOH-P levels were significantly related to the phosphorus concentrations in the water column only in shallow water with a long residence time. It was revealed that water residence time and water depth are two key factors that affect the relationship of the phosphorus content between the sediment and the water column. In deep waters or waters with short residence time, the NaOH-P content in the sediment hardly influenced the phosphorus concentration in the water columns, even at high levels. However, in shallow waters with long residence time, the sediment acted as both sources and sinks and frequently exchanged nutrients with the overlying water, especially during bloom periods in summer. Thus NaOH-P could be a potential risk of eutrophication in such waters.


Asunto(s)
Eutrofización , Lagos , Fósforo , Contaminantes Químicos del Agua , China , Clorofila A , Monitoreo del Ambiente , Sedimentos Geológicos
17.
Zhen Ci Yan Jiu ; 44(11): 817-21, 2019 Nov 25.
Artículo en Chino | MEDLINE | ID: mdl-31777231

RESUMEN

OBJECTIVE: To observe the effect of moxibustion pretreatment at different time on serum hormone levels in diminished ovarian reserve (DOR) rats, so as to explore its protective mechanisms. METHODS: Forty female SD rats were randomly divided into control, model, moxibustion-1 (moxibustion was given 4 weeks before modeling), moxibustion-2 (moxibustion was given 2 weeks before modeling and 2 weeks from the 1st day on after modeling ) and moxibustion-3 (moxibustion was given 4 weeks from the 1st day on after modeling) groups (n=8 rats in each group). The DOR model was established by gavage of Tripterygium Glycosides (75 mg/kg) once daily for 14 days. Grain-moxibustion was applied to "Shenshu" (BL23) and "Guanyuan" (CV4) for 7 cones, 5 times a week for 4 weeks. The body weight and the ovary weight were recorded for calculating the ovarian index. The levels of serum anti-mullerian hormone (AMH), follicle stimulating hormone (FSH), estradiol (E2), androgen (T) and dehydroepiandrosterone (DHEA) were detected by ELISA. RESULTS: After modeling, ovarian index and serum AMH levels were obviously decreased (P<0.05), and the levels of serum FSH, E2, T and DHEA were significantly increased in contrast with the control group (P<0.05). Following intervention and compared with the model group, the serum FSH and DHEA levels of each moxibustion group were significantly reduced (P<0.05), the AMH levels significantly increased and E2 and T contents significantly decreased in the moxibustion-2 and moxibustion-3 groups (P<0.05). The serum FSH, E2 and T contents in moxibustion-2 group were obviously lower than those of the moxibustion-1 and moxibustion-3 groups (P<0.05). CONCLUSION: Moxibustion pre-treatment can improve ovarian reserve function in DOR rats, while the effect is different with different intervention time, and the best intervention time is pre-occurrence and early stage of DOR.


Asunto(s)
Moxibustión , Reserva Ovárica , Animales , Femenino , Hormona Folículo Estimulante , Ovario , Ratas , Ratas Sprague-Dawley
18.
Nat Commun ; 9(1): 5142, 2018 12 03.
Artículo en Inglés | MEDLINE | ID: mdl-30510233

RESUMEN

Technologies for mapping the spatial and temporal patterns of neural activity have advanced our understanding of brain function in both health and disease. An important application of these technologies is the discovery of next-generation neurotherapeutics for neurological and psychiatric disorders. Here, we describe an in vivo drug screening strategy that combines high-throughput technology to generate large-scale brain activity maps (BAMs) with machine learning for predictive analysis. This platform enables evaluation of compounds' mechanisms of action and potential therapeutic uses based on information-rich BAMs derived from drug-treated zebrafish larvae. From a screen of clinically used drugs, we found intrinsically coherent drug clusters that are associated with known therapeutic categories. Using BAM-based clusters as a functional classifier, we identify anti-seizure-like drug leads from non-clinical compounds and validate their therapeutic effects in the pentylenetetrazole zebrafish seizure model. Collectively, this study provides a framework to advance the field of systems neuropharmacology.


Asunto(s)
Mapeo Encefálico/métodos , Encéfalo/efectos de los fármacos , Aprendizaje Automático , Neurofarmacología/métodos , Animales , Animales Modificados Genéticamente , Encéfalo/patología , Encéfalo/fisiopatología , Convulsivantes/química , Convulsivantes/farmacología , Modelos Animales de Enfermedad , Evaluación Preclínica de Medicamentos/métodos , Larva/efectos de los fármacos , Larva/fisiología , Estructura Molecular , Pentilenotetrazol/química , Pentilenotetrazol/farmacología , Convulsiones/tratamiento farmacológico , Convulsiones/fisiopatología , Pez Cebra
19.
Int Immunopharmacol ; 61: 290-296, 2018 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-29908492

RESUMEN

BACKGROUND: Guillain-Barré syndrome (GBS) is a rare, autoimmune-mediated disease. The use of Bifidobacterium is reportedly effective in alleviating GBS since they act by regulating T helper (Th) cells. OBJECTIVES: In this study, we explored the differentiation of T helper cell subsets in patients with GBS. We also evaluated the effect of GBS on Bifidobacterium levels in patients and the likely protective influence of this bacterium in alleviating the disease in an animal model. MATERIALS AND METHODS: We used flow cytometry, and real-time polymerase chain reaction (PCR) to determine the T cell subsets differentiation among 30 GBS patients and 20 healthy controls (HC). The concentration of Bifidobacterium was assayed by real-time PCR. Experimental autoimmune neuritis (EAN) animal model was established to support the protective role of Bifidobacterium in GBS. RESULTS: The expression of Th cells, Th2 and Th17 in the patients was significantly higher than that in the HC, while Treg cells decreased substantially. Moreover, the levels of Bifidobacterium in the GBS patients were considerably lower than those in the HC, the concentration of Bifidobacterium correlating with Th2 and Th17 subsets negatively. Treatment with Bifidobacterium significantly reduced the levels of Th2 and Th17 and promoted the levels of Treg cells. CONCLUSIONS: We concluded from this study that Bifidobacterium alleviated GBS by regulating Th cells, although in-depth studies might be required to fully understand the mechanism of action.


Asunto(s)
Bifidobacterium longum subspecies infantis/inmunología , Terapia Biológica , Síndrome de Guillain-Barré/terapia , Neuritis Autoinmune Experimental/terapia , Subgrupos de Linfocitos T/inmunología , Linfocitos T Reguladores/inmunología , Adulto , Animales , Autoinmunidad , Diferenciación Celular , Células Cultivadas , Femenino , Humanos , Activación de Linfocitos , Masculino , Persona de Mediana Edad , Ratas , Ratas Endogámicas , Subgrupos de Linfocitos T/microbiología , Linfocitos T Reguladores/microbiología
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