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BACKGROUND: This study aims to assess the efficacy and safety of Qingpeng ointment (QPO), a Tibetan medicine for alleviating symptoms in individuals with acute gouty arthritis (AGA). METHODS: This study was a randomized, double-blind, placebo-controlled trial that involved individuals with AGA whose joint pain, as measured on a visual analog scale (VAS) from 0 to 10, was equal to or greater than 3. The participants were randomly assigned to either the QPO or the placebo group and received their respective treatments twice daily for seven consecutive days. In case of intolerable pain, the participants were allowed to use diclofenac sodium sustained-release tablets as a rescue medicine. The primary outcomes measured were joint pain and swelling, while the secondary outcomes included joint mobility, redness, serum uric acid levels, C-reactive protein levels, and the amount of remaining rescue medicine. Any adverse events that occurred during the trial were also recorded. RESULTS: A total of 203 cases were divided into two groups, with balanced baselines: 102 in the QPO group and 101 in the placebo group. For joint pain, differences between the groups were notable in the VAS scores [1.75 (0, 3.00) versus 2.00 (1.00, 3.50); P = 0.038], changes in VAS [5.00 (3.00, 6.00) versus 4.00 (2.00, 6.00); P = 0.036], and disappearance rate [26.47% compared to 15.84%; P = 0.046] after treatment. Concerning joint swelling, significant between-group differences were observed in the VAS scores [1.00 (0, 2.30) versus 2.00 (0.70, 3.00); P = 0.032] and disappearance rate [33.33% compared to 21.78%; P = 0.046] at treatment completion. The QPO group exhibited a statistically significant mobility improvement compared to the placebo group (P = 0.004). No significant differences were found in other secondary outcomes. Five patients, four from the QPO group and one from the other, encountered mild adverse events, primarily skin irritation. All of these cases were resolved after dosage reduction or discontinuation of the medication. CONCLUSIONS: Compared to the placebo, QPO exhibits positive effects on AGA by alleviating pain, reducing swelling, and enhancing joint mobility, without causing significant adverse effects. TRIAL REGISTRATION: ISRCTN34355813. Registered on 25/01/2021.
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Artritis Gotosa , Humanos , Artritis Gotosa/tratamiento farmacológico , Pomadas/uso terapéutico , Medicina Tradicional Tibetana/efectos adversos , Ácido Úrico , Dolor/tratamiento farmacológico , ArtralgiaRESUMEN
Polymer micelles/vesicles made of a red-light-responsive Ru(II)-containing block copolymer (PolyRu) are elaborated as a model system for anticancer phototherapy. PolyRu is composed of PEG and a hydrophobic polypeptoid bearing thioether side chains, 40% of which are coordinated with [Ru(2,2':6',2â³-terpyridine)(2,2'-biquinoline)](PF6)2 via the Ru-S bond, resulting in a 67 wt % Ru complex loading capacity. Red-light illumination induces the photocleavage of the Ru-S bond and produces [Ru(2,2':6',2â³-terpyridine)(2,2'-biquinoline)(H2O)](PF6)2. Meanwhile, ROS are generated under the photosensitization of the Ru complex and oxidize hydrophobic thioether to hydrophilic sulfoxide, causing the disruption of micelles/vesicles. During the disruption, ROS generation and Ru complex release are synergistically enhanced. PolyRu micelles/vesicles are taken up by cancer cells while they exhibit very low cytotoxicity in the dark. In contrast, they show much higher cytotoxicity under red-light irradiation. PolyRu micelles/vesicles are promising nanoassembly prototypes that protect metallodrugs in the dark but exhibit light-activated anticancer effects with spatiotemporal control for photoactivated chemotherapy and photodynamic therapy.
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Complejos de Coordinación , Rutenio , Especies Reactivas de Oxígeno , Rutenio/farmacología , Rutenio/química , Liberación de Fármacos , Micelas , Fototerapia/métodos , Polímeros/química , Sulfuros , Complejos de Coordinación/farmacología , Complejos de Coordinación/químicaRESUMEN
BACKGROUND: Jujube, a popular fruit from the Rhamnaceae family, relieves colorectal inflammation caused by spleen deficiency and has been used in many formulas in clinical for decades to treat colorectal cancer (CRC). As of yet, the therapeutic substances and mechanism of their action are unknown. PURPOSE: The purpose of this study is to define the therapeutic substances of jujube and its mechanism of action in treating CRC. METHODS: The pharmacological effects of jujube extract and its fractions were evaluated in vivo using a CRC mouse model induced by AOM/DSS. The DAI value, colon length, mortality, tumor burden, and histological tumor size of the treated animals were compared. To explore the potential therapeutic substances, LC-MS analysis was conducted to characterize the serum migration components. A network pharmacology experiment was carried out for potential molecular targets. To verify the therapeutic substances as well as the molecular mechanism of jujube intervening CRC, cellular MTT assay of the serum migration components, Western blot and IHC tests were conducted. RESULTS: The in vivo pharmacological studies showed that compared to AOM/DSS treated mice, the mortality and DAI value, tumor burden, and histological tumor size of jujube extract and its fat-soluble fraction (mainly contained triterpenes) treated mice were significantly reduced, and their colon lengths were obviously longer than AOM/DSS treated mice. The targeted-LC/MS analysis supposed triterpenes 3, 7, 9, 11, 12, 14, 17 - 21, and 25 - 28 to be the serum migration components, which might be the potential therapeutic substances. In the network pharmacology experiment, the GO annotation and enrichment analysis of the KEGG pathway indicated that PI3K-Akt pathway and inflammatory reaction were important factors for jujube inhibiting CRC. Cellular MTT assay of serum migration components indicated that the potential effective substances from fat-soluble fraction to be triterpenes 3, 7, 17, 19, 20, and 25. The Western blot and IHC assays implied that the jujube extract, its fat-soluble fraction, and triterpenes 7, 17, and 20 showed inhibition on the expression of PI3K/Akt/NF-κB signaling pathway-related proteins. Additionally, it was noted in the pharmacodynamic experiment that ZJL's effectiveness was more apparent than ZJH and SQL in tumor burden rate, colon length, and spleen weight, which indicated that the efficacy of ZJ is contributed from CD and SQ, and they may have a synergistic effect on anti-CRC. CONCLUSION: These results for the first time provide evidence that jujube triterpenes possess an anti-CRC effect, their mechanism was involving the control of the PI3K/Akt/NF-κB signaling pathway. What's more, the potential synergistic effect of the fat-soluble and water-soluble components found in this study provided a solid foundation for our deep understanding of how jujube can ameliorate CRC.
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Neoplasias Colorrectales , Triterpenos , Ziziphus , Animales , Ratones , Ziziphus/metabolismo , FN-kappa B/metabolismo , Triterpenos/farmacología , Proteínas Proto-Oncogénicas c-akt , Frutas , Fosfatidilinositol 3-Quinasas , Neoplasias Colorrectales/tratamiento farmacológico , Neoplasias Colorrectales/prevención & control , Neoplasias Colorrectales/patologíaRESUMEN
BACKGROUND: Few observational studies have investigated the association of dietary antioxidant intake with post-stroke depression (PSD) risk. We used the cross-sectional and longitudinal design to investigate the independent and joint associations between dietary antioxidant intake and PSD risk and all-cause mortality. METHODS: Participants from the 2005-2014 National Health and Nutrition Examination Survey (NHANES) aged 20 years and older with stroke were included. Logistic and Cox regression analyses were used to assess the associations of dietary antioxidant intake, including vitamin A, vitamin C, vitamin E, zinc, selenium, and carotenoids, and composite dietary antioxidant index (CDAI) with PSD risk and all-cause mortality. RESULTS: The highest quartile of dietary vitamin A (OR: 0.54, 95%CI: 0.32, 0.92), total carotenoids (OR: 0.56, 95%CI: 0.34, 0.94), and selenium intake (OR: 0.53, 95%CI: 0.31, 0.90) were associated with decreased PSD risk compared with those in the lowest quartile. The results showed a negative association between CDAI and PSD risk, with the lowest OR in the third quartiles (OR: 0.49, 95%CI: 0.30, 0.83). Furthermore, the highest quartile of dietary vitamin A (HR: 0.63, 95%CI: 0.45, 0.89), vitamin E (HR: 0.69, 95%CI: 0.48, 0.99), zinc (HR: 0.57, 95%CI: 0.40, 0.81), selenium (HR: 0.64, 95%CI: 0.46, 0.90), and total carotenoids (HR: 0.66, 95%CI: 0.47, 0.92) intake and CDAI (HR: 0.56, 95%CI: 0.39, 0.81) were associated with decreased all-cause mortality compared with those in the lowest quartile. CONCLUSION: Increased intake of dietary antioxidant may protect from depressive symptoms and improve the prognosis of stroke patients.
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Antioxidantes , Selenio , Humanos , Antioxidantes/uso terapéutico , Encuestas Nutricionales , Vitamina A , Estudios Transversales , Depresión/epidemiología , Depresión/etiología , Vitamina E , Carotenoides , Dieta/métodos , ZincRESUMEN
The technique for target detection based on a convolutional neural network has been widely implemented in the industry. However, the detection accuracy of X-ray images in security screening scenarios still requires improvement. This paper proposes a coupled multi-scale feature extraction and multi-scale attention architecture. We integrate this architecture into the Single Shot MultiBox Detector (SSD) algorithm and find that it can significantly improve the effectiveness of target detection. Firstly, ResNet is used as the backbone network to replace the original VGG network to improve the feature extraction capability of the convolutional neural network for images. Secondly, a multi-scale feature extraction (MSE) structure is designed to enrich the information contained in the multi-stage prediction feature layer. Finally, the multi-scale attention architecture (MSA) is fused onto the prediction feature layer to eliminate the redundant features' interference and extract effective contextual information. In addition, a combination of Adaptive-NMS and Soft-NMS is used to output the final prediction anchor boxes when performing non-maximum suppression. The results of the experiments show that the improved method improves the mean average precision (mAP) value by 7.4% compared to the original approach. New modules make detection much more accurate while keeping the detection speed the same.
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Procesamiento de Imagen Asistido por Computador , Redes Neurales de la Computación , Procesamiento de Imagen Asistido por Computador/métodos , Algoritmos , Extractos VegetalesRESUMEN
Bone implant-associated infections induced by bacteria frequently result in repair failure and threaten the health of patients. Although black phosphorus (BP) material with superior photothermal conversion ability is booming in the treatment of bone disease, the development of BP-based bone scaffolds with excellent photothermal stability and antibacterial properties simultaneously remains a challenge. In nature, chloroplasts cannot only convert light into chemical energy, but also hold a protective and defensive envelope membrane. Inspired by this, a self-defensive bone scaffold with stable photothermal property is developed for infected bone defect therapy. Similar to thylakoid and stroma lamella in chloroplasts, BP is integrated with chitosan and polycaprolactone fiber networks. The mussel-inspired polydopamine multifunctional "envelope membrane" wrapped above not only strengthens the photothermal stability of BP-based scaffolds, but also realizes the in situ anchoring of silver nanoparticles. Bacteria-triggered infection of femur defects in vivo can be commendably inhibited at the early stage via these chloroplast-inspired implants, which then effectively promotes endogenous repair of the defect area under mild hyperthermia induced by near-infrared irradiation. This chloroplast-inspired strategy shows outstanding performance for infected bone defect therapy and provides a reference for the functionality of other biomedical materials.
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Hipertermia Inducida , Nanopartículas del Metal , Humanos , Plata , Fototerapia , Materiales Biocompatibles/químicaRESUMEN
BACKGROUND: Globally, breast cancer is the most common cancer type in terms of incidence for women. Women with breast cancer endure higher levels of psychological distress than other types of cancer because many lose their identity as a woman, which is an additional characteristic of their psychological distress. Research using phenomenology to explore "the meaning of life" is rare among women with breast cancer. PURPOSE: The purpose of this study was to explore the perspectives of women with breast cancer on "the meaning of life." METHODS: A phenomenological approach was used. Twenty-six women living with breast cancer drawn from a cancer treatment hospital in Taiwan participated in this study. A semistructured interview was utilized to collect the data, and Colaizzi's seven steps were used to analyze the data. RESULTS: Four themes emerged: (a) value of overcoming suffering, (b) value of reciprocal love, (c) value of self-transcendence, and (d) value of spiritual comfort. This means that the participants defined "the meaning of life" through the lens of suffering from cancer, reciprocal love from their families and friends, uncovering and discovering creative pathways that transformed their pain while searching for the value of their existence, and seeking spiritual guidance from religion. CONCLUSIONS: The participants identified the most pivotal aspect of healing as transforming their pain and accepting value for their suffering. They acknowledged they could not change the fact that they had cancer, but they could learn to accept it as part of their lived experience. Healthcare professionals may use these four themes at a clinically appropriate time on women's journeys toward healing to inspire women with breast cancer to process their own unique "meaning of life."
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Neoplasias de la Mama , Adaptación Psicológica , Neoplasias de la Mama/psicología , Femenino , Humanos , Dolor/psicología , Investigación Cualitativa , Espiritualidad , TaiwánRESUMEN
Demonstrating highly efficient alternating current (AC) magnetic field heating of nanoparticles in physiological environments under clinically safe field parameters has remained a great challenge, hindering clinical applications of magnetic hyperthermia. In this work, exceptionally high loss power of magnetic bone cement under the clinical safety limit of AC field parameters, incorporating direct current field-aligned soft magnetic Zn0.3 Fe2.7 O4 nanoparticles with low concentration, is reported. Under an AC field of 4 kA m-1 at 430 kHz, the aligned bone cement with 0.2 wt% nanoparticles achieves a temperature increase of 30 °C in 180 s. This amounts to a specific loss power value of 327 W gmetal-1 and an intrinsic loss power of 47 nHm2 kg-1 , which is enhanced by 50-fold compared to randomly oriented samples. The high-performance magnetic bone cement allows for the demonstration of effective hyperthermia suppression of tumor growth in the bone marrow cavity of New Zealand White Rabbits subjected to rapid cooling due to blood circulation, and significant enhancement of survival rate.
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Neoplasias Óseas , Hipertermia Inducida , Nanopartículas , Animales , Cementos para Huesos , Campos Magnéticos , ConejosRESUMEN
This study explored the perceptions of meaning of life for patients with depression. A qualitative phenomenology approach was used. Patients with depression (n = 20) were recruited until data saturation occurred. Findings revealed four themes all related to their value of: (1) accepting depression; (2) appreciating work (paid and non-paid); (3) embodying love and taking on responsibilities; (4) receiving spiritual comfort. Healthcare professionals could facilitate patients with depression to explore their meaning of life while enduring and transforming the emotional pain that accompanies depression, hence, perhaps, decreasing their suicidal ideations.
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Depresión , Espiritualidad , Emociones , Personal de Salud , HumanosRESUMEN
Twenty-two flavonoids and stilbenes (1-22) were obtained from the leaf of Morus alba var. multicaulis. Among them, morusalbanosides A (1), B1 (2), and B2 (3) were new compounds. Moreover, compounds 1, 3, 4-11, 15-18, and 22 displayed inhibitory effects on triglyceride (TG) accumulation in HepG2 cells in a concentration dependent manner. Furthermore, compounds 1, 3, 11, and 22 could activate the phosphorylation of AMP-activated protein kinase α (AMPKα), reduce the synthesis of TG by inhibiting the expression of fatty acid synthase (FAS) and stearoyl-CoA desaturase 1 (SCD1). While, only compounds 1 and 11 could promote the phosphorylation of acetyl-CoA carboxylase 1 (ACC1) and accelerate the oxidation of fatty acids by up-regulating carnitine palmitoyltransferase 1A (CPT1A). In brief, this study found that most of the researched flavonoids and stilbenes could regulate TG metabolism in vitro. They might play the role by up-regulating phosphorylation of AMPKα, inhibiting TG biosynthesis, and promoting the oxidation of fatty acids.
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Flavonoides/farmacología , Metabolismo de los Lípidos/efectos de los fármacos , Morus/química , Estilbenos/farmacología , Proteínas Quinasas Activadas por AMP/metabolismo , China , Flavonoides/aislamiento & purificación , Células Hep G2 , Humanos , Estructura Molecular , Fosforilación/efectos de los fármacos , Fitoquímicos/aislamiento & purificación , Fitoquímicos/farmacología , Hojas de la Planta/química , Estilbenos/aislamiento & purificación , Triglicéridos/metabolismoRESUMEN
Twenty-nine triterpenes were obtained from the fruits of Ziziphus jujuba Mill. through various chromatography methods, and their stereo-structures were confirmed by spectroscopic methods. Among them, 2α,3ß,20-trihydroxylupane-28-oic acid (1) was identified as a new compound, and the 1H and 13C NMR data of 7, 8 and 23, as well as the 13C NMR data of 17 are reported here for the first time. Meanwhile, the nitric oxide (NO) inhibitory activities of all compounds were examined in lipopolysaccharide (LPS)-stimulated RAW264.7 cells. As results, compounds 2, 7, 10-13, 15, 16, 18-21, 26-29 were found to play important roles in suppressing NO production at 5 µM. The structure-activity relationships (SARs) on NO inhibition indicated that the ursolic and oleanolic acid skeletons, p-coumaroyl group substitution, six-membered A ring, and deoxygenation (loss of C[double bond, length as m-dash]O) in the C ring showed a more positive effect on the NO inhibitory activity of triterpenes, while the reduction of the A ring C[double bond, length as m-dash]O to OH was a negative factor. Moreover, it was found that compounds 15 and 19 could suppress the phosphorylation of IκBα and NF-κB/p65 to prevent it from shifting into the nucleus and downregulate the expression of inflammatory factors, such as iNOS, IL-6 and TNF-α. Our investigations revealed that the NO inhibitory effects of the active triterpenes obtained from Z. jujuba were mediated, at least in part, through the NF-κB signaling pathway.
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Frutas/química , Inflamación/tratamiento farmacológico , Inhibidor NF-kappaB alfa/metabolismo , FN-kappa B/metabolismo , Extractos Vegetales/farmacología , Transducción de Señal/efectos de los fármacos , Triterpenos/farmacología , Ziziphus/química , Animales , Interleucina-6/metabolismo , Lipopolisacáridos/farmacología , Ratones , Óxido Nítrico/metabolismo , Óxido Nítrico Sintasa de Tipo II/metabolismo , Ácido Oleanólico , Fosforilación/efectos de los fármacos , Células RAW 264.7 , Factor de Transcripción ReIA/metabolismo , Factor de Necrosis Tumoral alfa/metabolismoRESUMEN
The article The structure-activity relationship review of the main bioactive constituents of Morus genus plants, written by Jiejing Yan, Jingya Ruan, Peijian Huang, Fan Sun, Dandan Zheng, Yi Zhang and Tao Wang was originally published Online First without Open Access.
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Morus genus plants are mainly distributed in the temperate to tropical areas over the world and include 17 species and two subspecies. Due to their excellent pharmacological activity, security in food additives and high value in the national economy, Morus genus plants have drawn more and more attention in recent years. In the light of the references published over the last few decades, flavonoids, benzofurans, stilbenes, and Diels-Alder adducts have been reported to be the main bioactive constituents of Morus genus plants. This review summarizes the compounds with excellent bioactivities isolated from Morus genus plants as well as their structure-activity relationships (SARs), which might be useful for the further research and development of Morus genus plants. The aromatic heterocycles with excellent bioactivities isolated from Morus genus plants as well as their structure-activity relationships (SARs) were summarized.
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BACKGROUND: Substance use is a global mental health issue. There has been limited research exploring the relationships among body, mind, and spirit well-being and the possibility of relapse across different categories of substance users. AIMS: The purpose of the current path analysis was to examine the relationship between body-mind-spirit well-being and the possibility of relapse intention as well as other relevant predictors in people who had a history of substance use. METHODS: A cross-sectional survey was used. Participants were recruited in Southern Taiwan between December 2015 and June 2016. Data were collected from 467 participants who had a history of using controlled substances. RESULTS: Path analysis results revealed that body-mind-spirit well-being was negatively predictive of the possibility of relapse intention. Out of several predictors, stress influence and duration of substance use had direct effects on body-mind-spirit well-being and the possibility of relapse intention, respectively. Stress influence and duration of substance use were associated with decreased body-mind-spirit well-being and increased relapse intention scores. In addition, no history of health problems and male gender were associated with increased body-mind-spirit well-being. CONCLUSIONS: Stress management and the duration of substance use play an important role in body-mind-spirit well-being and relapse intention in people with a history of substance use. Health care professionals could teach substance users coping strategies to address their stress and problems, which may improve their health and reduce the possibility of relapse intention.
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Intención , Psicofisiología , Espiritualidad , Trastornos Relacionados con Sustancias/rehabilitación , Adulto , Estudios Transversales , Femenino , Humanos , Masculino , Recurrencia , Estrés Psicológico/psicología , TaiwánRESUMEN
ETHNOPHARMACOLOGICAL RELEVANCE: Nelumbo nucifera Gaertn (lotus) leaves were empirically carbonized to enhance the hemostatic effect in traditional Chinese medicines. The mechanism of this application remains unclear. AIM OF THE STUDY: The present study aims at exploring the transformation of phytochemical compounds in lotus leaves after heating and figuring out the phytochemical mechanism of the application of charcoal hemostatic styptics. METHODS AND RESULTS: Raw lotus leaves were heated at 150⯰C and 220⯰C, respectively, and the transformation of the phytochemicals was studied. Flavonol glycosides in raw lotus leaves were found to be degraded to their corresponding aglycons in 150⯰C lotus leaf charcoals (LLC) and the subsequent degradation products of aglycons in 220⯰C LLC. 150⯰C LLC exhibited the most desirable hemostatic effect in mice on reducing both bleeding time (BT) and clotting time (CT) by more than 30% as compared to the untreated group (Pâ¯<â¯0.05). The extracts of 150⯰C LLC were further separated by using different solvents. Ethyl acetate fraction which contained much flavonol aglycons displayed the most desirable hemostatic effect. On the contrary, petroleum ether fraction contains poor flavonoid and much alkaloid thus prolonged BT and CT. N-butanol extracts which contained only flavonol glycoside failed to shorten CT. In rats, quercetin (aglycon) standard promoted blood coagulation by shortening APTT (activated partial thromboplastin time) and increasing fibrinogen (Pâ¯<â¯0.05). Hyperoside (glycoside) increased fibrinogen and platelet count (Pâ¯<â¯0.05). Nuciferine was shown to prolong APTT and TT (thrombin time) and decrease fibrinogen (Pâ¯>â¯0.05). CONCLUSION: Degradation of flavonoids and alkaloids in lotus leaves was suggested to enhance the hemostatic effect of LLC. Flavonol aglycons were found to be more effective on blood clotting compared with their corresponding glycosides. Nuciferine, a typical alkaloid in lotus leaves which was degraded in LLC showed anticoagulation effect in rats. The content of flavonoid aglycon can be regarded as a criterion to qualify LLC.
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Carbón Orgánico/farmacología , Flavonoles/farmacología , Glicósidos/farmacología , Hemostáticos/farmacología , Lotus/química , Hojas de la Planta/química , Alcaloides/química , Alcaloides/farmacología , Animales , Carbón Orgánico/química , Flavonoides/química , Flavonoides/farmacología , Flavonoles/química , Glicósidos/química , Hemostáticos/química , Masculino , Medicina Tradicional China/métodos , Ratones , Nelumbo/química , Extractos Vegetales/química , Extractos Vegetales/farmacología , Ratas , Ratas Sprague-DawleyRESUMEN
Nine new isoprenoids, named as dictamtrinor-guaianols A (1), B (2), C (3), D (4), and E (5), dictamnorsesquiterpenol A (6), dictamnorsesquiterpenosides B (7) and C (8), as well as dictamtriterpenol A (9), along with eight known compounds (10-17) were obtained from 70% EtOH extract of Cortex Dictamni. Their structures were ascertained based on the extensive spectroscopic methods and ECD data analysis. Moreover, LC-MS analysis result suggested compounds 2 and 3 were natural products. Furthermore, lipopolysaccharide (LPS)-stimulated RAW264.7 macrophage model were used to evaluate nitric oxide production inhibitory activities of them, and compounds 2, 3, 5, 6, 8-11, as well as 15-17 displayed significant activities at 40⯵M.
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Dictamnus/química , Óxido Nítrico/metabolismo , Terpenos/farmacología , Animales , China , Ratones , Estructura Molecular , Fitoquímicos/aislamiento & purificación , Fitoquímicos/farmacología , Extractos Vegetales/química , Raíces de Plantas/química , Células RAW 264.7 , Sesquiterpenos/aislamiento & purificación , Sesquiterpenos/farmacología , Terpenos/aislamiento & purificaciónRESUMEN
Pluchea indica Less. is a medicine and food dual-use plant, which belongs to the Pluchea genus, Asteraceae family. Its main constituents are quinic acids, flavonoids, thiophenes, phenolic acids, as well as sesquiterpenes. In order to provide a comprehensive chemical profiling of P. indica, an orthogonal chromatography combining reverse-phase chromatography BEHC18 column with a normal-phase chromatography silica column as the separation system and a ESI-Q-Orbitrap MS as the detector in both positive and negative ion modes were used. According to the retention time (tR) and the exact mass-to-charge ratio (m/z), 67 compounds were unambiguously identified by comparing to the standard references. Moreover, 47 compounds were tentatively speculated on the basis of the rules of MS/MS fragmentation pattern and chromatographic elution order generalized from the above-mentioned reference standards. Among them, 10 of them were potentially novel.
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Asteraceae/química , Flavonoides/química , Componentes Aéreos de las Plantas/química , Extractos Vegetales/química , Cromatografía Liquida , Etanol/química , Flavonoides/aislamiento & purificación , Humanos , Gel de Sílice/química , Espectrometría de Masa por Ionización de ElectrosprayRESUMEN
Eight new compounds named as dictamalkosides A (1), B (2), C (3), dictamphenosides A (4), B (5), C (6), D (7) and E (8), as well as 23 known ones were obtained from the 70% EtOH extract of Cortex Dictamni. Their structures were ascertained based on the spectroscopic evidences. Among the known compounds, 14, 17-23, 25-28, and 31 were isolated from Dictamnus genus for the first time; 16 and 24 were firstly isolated from this plant. And the 13C NMR data of 14 was reported here for the first time. Moreover, compounds 1-8, 12, 18-21, 27 and 31 were found to exhibit potential inhibitory effect on LPS-induced NO production at 40⯵M for RAW 264.7 macrophages, which suggested alkaloids and phenolic acids might be anti-inflammation therapeutic substance in Cortex Dictamni.
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Alcaloides/farmacología , Antiinflamatorios/farmacología , Dictamnus/química , Hidroxibenzoatos/farmacología , Alcaloides/aislamiento & purificación , Animales , Antiinflamatorios/aislamiento & purificación , China , Hidroxibenzoatos/aislamiento & purificación , Macrófagos/efectos de los fármacos , Ratones , Estructura Molecular , Óxido Nítrico/metabolismo , Fitoquímicos/aislamiento & purificación , Fitoquímicos/farmacología , Plantas Medicinales/química , Células RAW 264.7RESUMEN
Many nurses in Taiwan use quantitative research for their master's thesis. However, qualitative research explores humankind in depth providing a more holistic approach relating to nursing. The purpose of this study was to explore the rationale postgraduate students used to choose the research methods for their masters' theses in Taiwan. A descriptive qualitative research design was used. Data were collected through semi-structured interviews of sixteen nursing students studying a master's from seven different Universities in Taiwan in 2016. Data were analyzed using thematic analysis. Finding revealed three themes (1) Students' personal and professional backgrounds; (2) Myths about quantitative research; (3) Misperceptions about qualitative research. Nurse educators could use these findings as a reference to design post-graduate nursing courses. It is essential to provide a balanced educative experience between delivering qualitative and quantitative modules to enhance respect of research method, knowledge and skills. Further, this could facilitate students' choice in research methods when designing their master's theses.
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Tesis Académicas como Asunto , Proyectos de Investigación , Estudiantes de Enfermería/psicología , Adulto , Actitud del Personal de Salud , Educación de Postgrado en Enfermería , Femenino , Humanos , Entrevistas como Asunto , Persona de Mediana Edad , TaiwánRESUMEN
A series of 4-methylidene sterols including three new compounds 1-3, were isolated from the marine sponge Theonella swinhoei. The structures of new compounds were determined on the basis of spectroscopic analyses. Compounds 3, 5, and 6 showed cytotoxicities against U937, MCF-7, and PC-9 cancer cells with IC50 in the range of 1.6-8.8⯵M. The new compound 3 exhibited remarkable proapoptotic activity in breast cancer cells. Mechanically, 3 significantly triggered reactive oxygen species (ROS) accumulation resulting in apoptosis and DNA damage in breast cancer cells.