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1.
Biochem Pharmacol ; 224: 116206, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38615921

RESUMEN

Long-chain fatty acyl-Coa ligase 4 (ACSL4) is an important enzyme that converts fatty acids to fatty acyl-Coa esters, there is increasing evidence for its role in carcinogenesis. However, the precise role of ACLS4 in hepatocellular carcinoma (HCC) is not clearly understood. In the present study, we provide evidence that ACSL4 expression was specifically elevated in HCC and is associated with poor clinical outcomes. ACSL4 significantly promotes the growth and metastasis of HCC both in vitro and in vivo. RNA sequencing and functional experiments showed that the effect of ACSL4 on HCC development was heavily dependent on PAK2. ACSL4 expression is well correlated with PAK2 in HCC, and ACSL4 even transcriptionally increased PAK2 gene expression mediated by Sp1. In addition, emodin, a naturally occurring anthraquinone derivative, inhibited HCC cell growth and tumor progression by targeting ACSL4. In summary, ACSL4 plays a novel oncogene in HCC development by regulating PAK2 transcription. Targeting ACSL4 could be useful in drug development and therapy for HCC.


Asunto(s)
Carcinoma Hepatocelular , Coenzima A Ligasas , Progresión de la Enfermedad , Neoplasias Hepáticas , Ratones Desnudos , Quinasas p21 Activadas , Carcinoma Hepatocelular/patología , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/metabolismo , Humanos , Neoplasias Hepáticas/patología , Neoplasias Hepáticas/metabolismo , Neoplasias Hepáticas/genética , Quinasas p21 Activadas/metabolismo , Quinasas p21 Activadas/genética , Coenzima A Ligasas/metabolismo , Coenzima A Ligasas/genética , Animales , Ratones , Masculino , Línea Celular Tumoral , Ratones Endogámicos BALB C , Transcripción Genética/efectos de los fármacos , Regulación Neoplásica de la Expresión Génica , Emodina/farmacología , Femenino
2.
J Pharm Biomed Anal ; 234: 115481, 2023 Sep 20.
Artículo en Inglés | MEDLINE | ID: mdl-37413917

RESUMEN

Scutellaria baicalensis Georgi (SG) and Scutellaria rehderiana Diels (SD) belong to the same genus of Scutellaria in the Labiatae (Lamiaceae) family. SG is confirmed as the medicinal source according to the Chinese Pharmacopeia, but SD is often used as a substitute for SG due to its abundant plant resources. However, the current quality standards are far from sufficient to judge the quality differences between SG and SD. In this study, an integrated strategy of "biosynthetic pathway (specificity) - plant metabolomics (difference) - bioactivity evaluation (effectiveness)" was established to evaluate this quality differences. First, an ultrahigh-performance liquid chromatography-quadrupole time-of-flight mass spectrometry (UHPLC-Q/TOF-MS/MS) method was developed for the identification of chemical components. The abundant components information was obtained and the characteristic constituents were screened according to the location in the biosynthetic pathway as well as species specificity. Then, plant metabolomics combined with multivariate statistical analysis to find differential components between SG and SD. The chemical markers for quality analysis were determined based on the differential and characteristic components, and the content of each marker was tentatively evaluated through the semi-quantitative analysis of UHPLC-Q/TOF-MS/MS. Finally, the anti-inflammatory activity of SG and SD was compared by measuring the inhibitory effect on the release of NO from lipopolysaccharide (LPS)-stimulated RAW 264.7 cells. Under this analytical strategy, a total of 113 compounds were tentatively identified in both SG and SD, among which baicalein, wogonin, chrysin, oroxylin A 7-O-ß-D-glucuronoside, pinocembrin and baicalin were selected as chemical markers due to their species characteristics and differentiation. The contents of oroxylin A 7-O-ß-D-glucuronoside and baicalin was higher in SG, and the others were higher in SD. In addition, both SG and SD exhibited prominent anti-inflammatory activity, but SD was less effective. The analysis strategy combining phytochemistry and bioactivity evaluation realized the scientific evaluation of the intrinsic quality differences between SG and SD, which provides a reference for fully utilizing and expanding the medicinal resources, and also provides a reference for the comprehensive quality control of herbal medicines.


Asunto(s)
Scutellaria , Scutellaria/química , Scutellaria baicalensis/química , Espectrometría de Masas en Tándem/métodos , Extractos Vegetales/farmacología , Extractos Vegetales/química , Flavonoides/farmacología , Cromatografía Liquida/métodos
3.
Sci Adv ; 9(6): eade5393, 2023 02 10.
Artículo en Inglés | MEDLINE | ID: mdl-36763655

RESUMEN

Dysregulated endocrine hormones (EHs) contribute to tumorigenesis, but how EHs affect the tumor immune microenvironment (TIM) and the immunotherapy of non-small cell lung cancer (NSCLC) is still unclear. Here, endogenous ouabain (EO), an adrenergic hormone, is elevated in patients with NSCLC and closely related to tumor pathological stage, metastasis, and survival. EO promotes the suppression of TIM in vivo by modulating the expression of immune checkpoint proteins, in which programmed cell death protein ligand 1 (PD-L1) plays a major role. EO increases PD-L1 transcription; however, the EO receptor Na- and K-dependent adenosine triphosphatase (Na, K-ATPase) α1 interacts with PD-L1 to trigger the endocytic degradation of PD-L1. This seemingly contradictory result led us to discover the mechanism whereby EO cooperates with Na, K-ATPase α1 to finely control PD-L1 expression and dampen tumoral immunity. In conclusion, the Na, K-ATPase α1/EO signaling facilitates immune escape in lung cancer, and manipulation of this signaling shows great promise in improving immunotherapy for lung adenocarcinoma.


Asunto(s)
Adenocarcinoma del Pulmón , Antígeno B7-H1 , Neoplasias Pulmonares , ATPasa Intercambiadora de Sodio-Potasio , Humanos , Adenosina Trifosfatasas , Antígeno B7-H1/metabolismo , Carcinoma de Pulmón de Células no Pequeñas/genética , Ligandos , Pulmón/metabolismo , Neoplasias Pulmonares/patología , Microambiente Tumoral , ATPasa Intercambiadora de Sodio-Potasio/metabolismo
4.
Br J Pharmacol ; 180(12): 1562-1581, 2023 06.
Artículo en Inglés | MEDLINE | ID: mdl-36581319

RESUMEN

BACKGROUND AND PURPOSE: Squalene epoxidase (SQLE) is a key enzyme involved in cholesterol biosynthesis, but growing evidence also reveals that SQLE is abnormally expressed in some types of malignant tumours, even though the underlying mechanism remains poorly understood. EXPERIMENTAL APPROACH: Bioinformatics analysis and RNA sequencing were applied to detect differentially expressed genes in clinical hepatocellular carcinoma (HCC). MTT, colony formation, AnnexinV-FITC/PI, EdU, wound healing, transwell, western blot, qRT-PCR, IHC, F-actin, RNA-sequencing, dual-luciferase reporters, and H&E staining were used to investigate the pharmacological effects and possible mechanisms of SQLE. KEY RESULTS: SQLE expression was specifically elevated in HCC, correlating with poor clinical outcomes. SQLE significantly promoted HCC growth, epithelial-mesenchymal transition, and metastasis both in vitro and in vivo. RNA sequencing and functional experiments revealed that the protumourigenic effect of SQLE on HCC was closely related to the activation of TGF-ß/SMAD signalling, but the stimulatory effect of SQLE on TGF-ß/SMAD signalling and HCC development is critically dependent on STRAP. SQLE expression is well correlated with STRAP in HCC, and further, to amplify TGF-ß/SMAD signalling, SQLE even transcriptionally increased STRAP gene expression mediated by AP-2α. Finally, as a chemical inhibitor of SQLE, NB-598 markedly inhibited HCC cell growth and tumour development. CONCLUSIONS AND IMPLICATIONS: Taken together, SQLE serves as a novel oncogene in HCC development by activating TGF-ß/SMAD signalling. Targeting SQLE could be useful in drug development and therapy for HCC.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/patología , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patología , Escualeno-Monooxigenasa/genética , Escualeno-Monooxigenasa/metabolismo , Línea Celular , Proliferación Celular/genética , Factor de Crecimiento Transformador beta/metabolismo , Línea Celular Tumoral , Movimiento Celular/genética , Regulación Neoplásica de la Expresión Génica
5.
J Sep Sci ; 45(23): 4280-4291, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36168848

RESUMEN

Fructus Psoralea is widely used to treat osteoporosis and skin inflammatory diseases. Because of the side effects on the liver, renal and cardiovascular systems, it is processed to salt-processed Fructus Psoraleae to meet the requirements of clinical use. However, the mechanisms involved in the transformation of the chemical components are unclear. In this study, ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry was used to analyze the chemical profiles of this herbal medicine and the chemical transformation mechanism involved during the salt processing was studied. A total of 83 compounds were identified. Principal component analysis and orthogonal partial least squares discriminate analysis were used to observe the distribution trend of all samples and visualize the difference. Raw and processed Fructus Psoraleae were clearly clustered into two groups. Furthermore, 17 marker compounds were identified as primary contributors to their differences based on t-test analysis (p < 0.01) and orthogonal partial least squares discriminate analysis (variable importance for the projection > 1). Finally, ultra-high performance liquid chromatography coupled with triple quadrupole tandem mass spectrometry was used to evaluate the quality of Fructus Psoraleae by simultaneous analysis of 13 components highly related to efficacy. There were variations in the contents of 13 chemicals of Fructus Psoraleae and salt-processed products. The results of untargeted and targeted metabolomics revealed that salt processing affected the chemical composition of Fructus Psoraleae.


Asunto(s)
Metabolómica
6.
Front Nutr ; 9: 1035623, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36761989

RESUMEN

Introduction: Crataegi fructus (CF) is an edible and medicinal functional food used worldwide that enhances digestion if consumed in the roasted form. The odour of CF, as a measure of processing degree during roasting, significantly changes. However, the changes remain unclear, but are worth exploring. Methods: Herein, the variations in volatile flavour compounds due to CF roasting were investigated using an electronic nose (E-nose) and headspace gas chromatography-mass spectrometry (HS-GC-MS). Results: A total of 54 components were identified by GC-MS. Aldehydes, ketones, esters, and furans showed the most significant changes. The Maillard reaction, Strecker degradation, and fatty acid oxidation and degradation are the main reactions that occur during roasting. The results of grey relational analysis (GRA) showed that 25 volatile compounds were closely related to odour (r > 0.9). Finally, 9 volatile components [relative odour activity value, (ROAV) ≥ 1] were confirmed as key substances causing odour changes. Discussion: This study not only achieves the objectification of odour evaluation during food processing, but also verifies the applicability and similarity of the E-nose and HS-GC-MS.

7.
Zhongguo Zhong Yao Za Zhi ; 47(24): 6624-6632, 2022 Dec.
Artículo en Chino | MEDLINE | ID: mdl-36604911

RESUMEN

To explore the color value changes after processing and further explore the correlations between color values and internal components, we established a rapid evaluation method for the quality of Glycyrrhizae Radix et Rhizoma and Glycyrrhizae Radix et Rhizoma Praeparata Cum Melle. In this study, the color values of Glycyrrhizae Radix et Rhizoma and Glycyrrhizae Radix et Rhizoma Praeparata Cum Melle were digitized by a spectrophotometer, and the standard ranges of color values of the two herbal medicines were established. Further, a discriminant analysis model was established to quickly and accurately distinguish the two herbal medicines. The content of 9 flavonoids and 1 triterpene in Glycyrrhizae Radix et Rhizoma and Glycyrrhizae Radix et Rhizoma Praeparata Cum Melle were determined by HPLC, and Pearson correlation analysis was adopted to analyze the correlations between the color values and the content of 10 components. The standard ranges of L~*, a~*, and b~* values were 65.539 6-68.305 8, 7.296 3-8.467 3, and 29.998 8-32.212 8 for Glycyrrhizae Radix et Rhizoma, and 43.654 3-47.166 4, 14.050 0-15.133 8, and 16.424 6-20.984 8 for Glycyrrhizae Radix et Rhizoma Praeparata Cum Melle, respectively. Glycyrrhizae Radix et Rhizoma had higher L~* and b~* values and lower a~* value than Glycyrrhizae Radix et Rhizoma Praeparata Cum Melle, which indicated that processing with honey decreased the white and yellow values and increased the red value. The original and cross validation of the established discriminant analysis model met the requirements, and the external validation of the model showed the prediction accuracy of 100%. Pearson correlation analysis showed that the a~* value was positively correlated with the content of liquiritin apioside and isoliquiritin apioside(P<0.05), while the L~* and b~* values were negatively correlated with the content of the above two components(P<0.05). After processing with honey, L~* and b~* decreased while a~* increased, and the content of liquiritin apioside and isoliquiritin apioside increased, which was consistent with the content determination results. This study reveals the regularity of the color values of Glycyrrhizae Radix et Rhizoma after processing with honey roasting, as well as the correlations between color values and component content, which provides a basis for the rapid quality evaluation of Glycyrrhizae Radix et Rhizoma and Glycyrrhizae Radix et Rhizoma Praeparata Cum Melle.


Asunto(s)
Medicamentos Herbarios Chinos , Glycyrrhiza , Plantas Medicinales , Medicamentos Herbarios Chinos/análisis , Rizoma/química
8.
Mater Sci Eng C Mater Biol Appl ; 128: 112326, 2021 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-34474877

RESUMEN

Bone defects remain a challenging problem for doctors and patients in clinical practice. Processed pyritum is a traditional Chinese medicine that is often used to clinically treat bone fractures. It contains mainly Fe, Zn, Cu, Mn, and other elements. In this study, we added the extract of processed pyritum to ß-tricalcium phosphate and produced a porous composite TPP (TCP/processed pyritum) scaffold using digital light processing (DLP) 3D printing technology. Scanning electron microscopy (SEM) analysis revealed that TPP scaffolds contained interconnected pore structures. When compared with TCP scaffolds (1.35 ± 0.15 MPa), TPP scaffolds (5.50 ± 0.24 MPa) have stronger mechanical strength and can effectively induce osteoblast proliferation, differentiation, and mineralization in vitro. Meanwhile, the in vivo study showed that the TPP scaffold had better osteogenic capacity than the TCP scaffold. Furthermore, the TPP scaffold had good biosafety after implantation. In summary, the TPP scaffold is a promising biomaterial for the clinical treatment of bone defects.


Asunto(s)
Fosfatos de Calcio , Andamios del Tejido , Humanos , Porosidad , Impresión Tridimensional
9.
Biomed Chromatogr ; 35(12): e5199, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-34144633

RESUMEN

Rhein is an active component from Chinese herbal medicine. It can cause diarrhea by inhibiting Na+ , K+ -ATPase activity on intestinal epithelial cells, thus decreasing the re-absorption of Na+ from intestinal tract to blood. However, when this Na+ , K+ -ATPase inhibition was quantitated by a colorimetric method that measures ATPase-catalyzed release of inorganic phosphorus, the data obtained were inconsistent and showed great variation. We developed a novel method using inductively coupled plasma mass spectrometry (ICP-MS) to quantitate the amount of intracellular Rb+ . This method largely mimics the 86 RbCl tracer flux assay, but it uses non-radioactive RbCl as a flux substrate. The results demonstrated that this method has better precision and accuracy than the conventional colorimetric method. More importantly, this method is free from radioactive substances, which is expected to make it safer and more convenient than the radioactive 86 RbCl tracer flux method. In conclusion, the ICP-MS method for Na+ , K+ -ATPase activity determination is novel and accurate. It can also provide a reference for studying the transport of other metal ions across membranes under biological conditions.


Asunto(s)
Antraquinonas/farmacología , Espectrometría de Masas/métodos , ATPasa Intercambiadora de Sodio-Potasio , Cloruros , Colorimetría , Células HCT116 , Humanos , Límite de Detección , Reproducibilidad de los Resultados , Rubidio , ATPasa Intercambiadora de Sodio-Potasio/antagonistas & inhibidores , ATPasa Intercambiadora de Sodio-Potasio/metabolismo
10.
Zhongguo Zhong Yao Za Zhi ; 46(6): 1393-1400, 2021 Mar.
Artículo en Chino | MEDLINE | ID: mdl-33787137

RESUMEN

L~*, a~* and b~* values of prepared slices of Curcumae Rhizoma were measured by spectrophotometer. SPSS 21.0 was used for discriminant analysis to establish the color range and mathematical prediction model of prepared slices of Curcumae Rhizoma. The values of L~*, a~* and b~* of kwangsiensis ranged from 58.09-62.40, 4.53-5.66 and 23.61-24.29, while the values of L~*, a~* and b~* of phaeocaulis were between 64.02-70.71,-0.89-4.13 and 44.59-54.52, respectively. The values of L~*, a~* and b~* of wenyujin were 68.55-70.99,-0.11-1.47 and 28.26-32.19, respectively. The mathematical prediction model was proved to be able to realize 100% identification of Curcumae Rhizome of different origins through original and cross validation and external samples validation. A dual wavelength HPLC was established; the contents of 9 sesquiterpenoids and 3 Curcumae Rhizomes were determined simultaneously; and the contents of Curcumae Rhizome of different origins were determined. The results showed that kwangsiensis had higher contents of neocurdione, ß-elemene and isocurcumaenol, phaeocaulis curcumin, furadienone, demethoxycurcumin and curcumin; and wenyujin mainly contained curdione, furadienes and guimarone. Pearson correlation analysis on L~*, a~*, b~* value and content of 12 components showed that curcumin, furadienone, demethoxycurcumin and curcumin had a significant positive correlation with b~* value(P<0.01). There was a significant negative correlation between neocurdione, ß-elemene and isocurcumaenol and L~* value(P<0.01). Curdione, furadienes and guimarone were significantly correlated with L~* value(P<0.01),indicating that the appearance co-lor of Curcumae Rhizoma could reflect the change of the content of the internal components. This study provided reference for the rapid recognition of Curcumae Rhizoma and the establishment of quality evaluation system.


Asunto(s)
Curcumina , Rizoma , Cromatografía Líquida de Alta Presión , Color , Curcuma
11.
Sci Rep ; 11(1): 1849, 2021 01 20.
Artículo en Inglés | MEDLINE | ID: mdl-33473146

RESUMEN

Crataegi Fructus (CF) is widely used as a medicinal and edible material around the world. Currently, different types of processed CF products are commonly found in the market. Quality evaluation of them mainly relies on chemical content determination, which is time and money consuming. To rapidly and nondestructively discriminate different types of processed CF products, an electronic nose coupled with chemometrics was developed. The odour detection method of CF was first established by single-factor investigation. Then, the sensor array was optimised by a stepwise discriminant analysis (SDA) and analysis of variance (ANOVA). Based on the best-optimised sensor array, the digital and mode standard were established, realizing the odour quality control of samples. Meanwhile, mathematical prediction models including the discriminant formula and back-propagation neural network (BPNN) model exhibited good evaluation with a high accuracy rate. These results suggest that the developed electronic nose system could be an alternative way for evaluating the odour of different types of processed CF products.

12.
J Sep Sci ; 44(5): 981-991, 2021 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-33351278

RESUMEN

Gardeniae Fructus, the dry fruit of Gardenia jasminoides Ellis, has been widely used for the treatment of different diseases. Although four types of processed Gardeniae Fructus products, characterized by differing effects, are available for clinical use, little is known regarding the respective processing mechanisms. In this study, ultra-high-performance liquid chromatography quadrupole time-of-flight mass spectrometry combined with multivariate statistical analysis was applied to characterize the chemical profiles of the differently processed Gardeniae Fructus products and to determine differences in their chemical compositions, thereby enabling us to identify those active compounds associated with the observed clinical effects. A total of 125 compounds were accordingly identified, among which, 56 were established as primary contributors to the significant differences (P < 0.01) between crude and processed Gardeniae Fructus, based on t-test analysis. Furthermore, the potential mechanisms underlying the chemical transformations that occurred during processing were discussed. The findings of this study may not only contribute to the more effective quality control of Gardeniae Fructus but also provide basic information for elucidating the mechanisms underlying the changes in chemical constituents in response to processing, and provide a basis for further investigations of Gardeniae Fructus processing mechanisms.


Asunto(s)
Medicamentos Herbarios Chinos/análisis , Frutas/química , Gardenia/química , Extractos Vegetales/análisis , Cromatografía Líquida de Alta Presión , Espectrometría de Masas , Estructura Molecular
13.
Rapid Commun Mass Spectrom ; 35(7): e9033, 2021 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-33368723

RESUMEN

RATIONALE: Crataegi Fructus (CF) is one of the most commonly used herbal medicines with a long history of clinical applications. CF is often processed to minimize gastric membrane irritation, although differently processed products can have different biological effects. The purpose of this study was to comprehensively identify the chemical composition of CF, determine the changes caused by processing, and elucidate the active constituents causing the clinical effects. This study aimed to define a theoretical basis for intensive mechanistic studies of CF processing and its reasonable clinical applications. METHODS: An optimized ultrahigh-performance liquid chromatography quadrupole time-of-flight mass spectrometry (UHPLC/QqTOFMS) method in positive and negative ion modes, coupled with multivariate statistical analyses, was developed for the identification and analysis of chemical components in raw and processed products of CF. RESULTS: A total of 87 compounds were identified, including 61 marker compounds that were found to be primary contributors to the significant differences (p < 0.01) between raw and processed products using principal component analysis, t-test, and Venn analysis. The conversion mechanism for a subset of the changed compounds was inferred by analyzing 25 unique differential components between the raw and processed CF. CONCLUSIONS: A rapid and efficient analytical method for identifying the chemical components in CF before and after processing was successfully established. We show how the changes in the chemical constituents in processed CF could be investigated using multivariate statistical analysis methods, and thus facilitate understanding of the processing mechanism of CF.

14.
Nat Prod Bioprospect ; 11(1): 73-79, 2021 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-33083968

RESUMEN

A phytochemical investigation of the EtOH extract of the flowers of Lagerstroemia indica L. led to the isolation and characterization of a new pyrrole alkaloid, named lagerindicine (1), along with four known compounds (2-5). Their structures were elucidated by the detailed spectroscopic analysis and comparison with literature data, whereas the structure, in particularly, the absolute configuration (AC) of 1, was firmly determined by total synthesis. All the isolates were evaluated for their cytotoxic effects against human colon cancer cell (HCT-116), and compound 3 exhibited weak cytotoxicity with IC50 value of 28.4 µM.

15.
Comb Chem High Throughput Screen ; 24(7): 921-932, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-32669076

RESUMEN

BACKGROUND: The manual identification of Fructus Crataegi processed products is inefficient and unreliable. Therefore, efficient identification of the Fructus Crataegis' processed products is important. OBJECTIVE: In order to efficiently identify Fructus Crataegis processed products with different odor characteristics, a new method based on an electronic nose and convolutional neural network is proposed. METHODS: First, the original smell of Fructus Crataegis processed products is obtained by using the electronic nose and then preprocessed. Next, feature extraction is carried out on the preprocessed data through convolution pooling layer LCP1, convolution pooling layer LCP2 and a full connection layer LFC. Thus, the feature vector of the processed products can be obtained. Then, the recognition model for Fructus Grataegis processed products is constructed, and the model is trained to obtain the optimized parameters: filters F1 and F2, bias vectors B1, B2, B3, and B4, matrices M1 and M2. Finally, the features of the target processed products are extracted through the trained parameters to achieve accurate prediction. RESULTS: The experimental results show that the proposed method has higher accuracy for the identification of Fructus Crataegis processed products, and is competitive with other machine learning based methods. CONCLUSION: The method proposed in this paper is effective for the identification of Fructus Crataegi processed products.


Asunto(s)
Medicamentos Herbarios Chinos/análisis , Nariz Electrónica , Redes Neurales de la Computación , Extractos Vegetales/análisis , Crataegus
16.
Pak J Pharm Sci ; 33(2(Supplementary)): 771-777, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-32863251

RESUMEN

Blood stasis syndrome (BSS) is characterized by blood retardation and is the major cause of some deadly diseases. Some factors that affect BSS have been identified. However, the small molecule that related to BSS is still largely unknown. Traditional Chinese Medicine (TCM), such as Sanleng and Ezhu, has been used for a long time in treating BSS and promising outcomes have been achieved. However, the mechanism of how they work is unclear. Thus, we constructed the Rat BSS model and treated them with Sanleng and Ezhu. Then, the liver dialysis of those rats was collected and the small molecule metabolites were analyzed by GC-MS based metabolomics approach. Our results showed after Sanleng and Ezhu treatment, several small molecule metabolites were significantly changed metabolites (VIP>1 and P<0.05). Pathway enrichment analysis also showed that Sanleng and Ezhu share the similar mechanism in treating BSS, such as regulating Glyoxylate and dicarboxylate metabolism pathway and energy metabolism. Besides, we also identified some key metabolites that were significantly correlated with BSS. In conclusion, those findings uncover the mechanism of Sanleng and Ezhu in treating BSS.


Asunto(s)
Curcuma/química , Medicamentos Herbarios Chinos/farmacología , Hepatopatías/tratamiento farmacológico , Hígado/efectos de los fármacos , Rizoma/química , Animales , Cromatografía de Gases y Espectrometría de Masas/métodos , Hepatopatías/metabolismo , Masculino , Medicina Tradicional China/métodos , Metabolómica/métodos , Ratas , Ratas Sprague-Dawley
17.
Nat Commun ; 11(1): 4780, 2020 Sep 22.
Artículo en Inglés | MEDLINE | ID: mdl-32963250

RESUMEN

Exciton dynamics can be strongly affected by lattice vibrations through electron-phonon coupling. This is rarely explored in two-dimensional magnetic semiconductors. Focusing on bilayer CrI3, we first show the presence of strong electron-phonon coupling through temperature-dependent photoluminescence and absorption spectroscopy. We then report the observation of periodic broad modes up to the 8th order in Raman spectra, attributed to the polaronic character of excitons. We establish that this polaronic character is dominated by the coupling between the charge-transfer exciton at 1.96 eV and a longitudinal optical phonon at 120.6 cm-1. We further show that the emergence of long-range magnetic order enhances the electron-phonon coupling strength by ~50% and that the transition from layered antiferromagnetic to ferromagnetic order tunes the spectral intensity of the periodic broad modes, suggesting a strong coupling among the lattice, charge and spin in two-dimensional CrI3. Our study opens opportunities for tailoring light-matter interactions in two-dimensional magnetic semiconductors.

18.
Proc Natl Acad Sci U S A ; 117(40): 24664-24669, 2020 Oct 06.
Artículo en Inglés | MEDLINE | ID: mdl-32968024

RESUMEN

We used a combination of polarized Raman spectroscopy experiment and model magnetism-phonon coupling calculations to study the rich magneto-Raman effect in the two-dimensional (2D) magnet CrI3 We reveal a layered-magnetism-assisted phonon scattering mechanism below the magnetic onset temperature, whose Raman excitation breaks time-reversal symmetry, has an antisymmetric Raman tensor, and follows the magnetic phase transitions across critical magnetic fields, on top of the presence of the conventional phonon scattering with symmetric Raman tensors in N-layer CrI3 We resolve in data and by calculations that the first-order A g phonon of the monolayer splits into an N-fold multiplet in N-layer CrI3 due to the interlayer coupling [Formula: see text] and that the phonons within the multiplet show distinct magnetic field dependence because of their different layered-magnetism-phonon coupling. We further find that such a layered-magnetism-phonon coupled Raman scattering mechanism extends beyond first-order to higher-order multiphonon scattering processes. Our results on the magneto-Raman effect of the first-order phonons in the multiplet and the higher-order multiphonons in N-layer CrI3 demonstrate the rich and strong behavior of emergent magneto-optical effects in 2D magnets and underline the unique opportunities of spin-phonon physics in van der Waals layered magnets.

19.
Steroids ; 155: 108558, 2020 03.
Artículo en Inglés | MEDLINE | ID: mdl-31866544

RESUMEN

Two new hydroperoxy steroids, namely, xidaosteroids A and B (1 and 2), along with five known related compounds 3-7, were isolated from the South China Sea gorgonian Rumphella sp.. Their structures were established by extensive spectroscopic analyses and comparison of the spectral data with those reported in the literature. In bioassay, compound 3 showed weak cytotoxicities against SNU-398 and Capan-1 cells.


Asunto(s)
Antozoos/química , Antineoplásicos/farmacología , Células A549 , Animales , Antineoplásicos/química , Antineoplásicos/aislamiento & purificación , Proliferación Celular/efectos de los fármacos , China , Ensayos de Selección de Medicamentos Antitumorales , Células HT29 , Humanos , Conformación Molecular , Estereoisomerismo
20.
Zhongguo Zhong Yao Za Zhi ; 43(18): 3795-3800, 2018 Sep.
Artículo en Chino | MEDLINE | ID: mdl-30384548

RESUMEN

Chinese medicine processing is the main feature that distinguishes traditional Chinese medicine from natural medicine and plant medicine, and is the main feature in clinical medication of traditional Chinese medicine. The research of Chinese medicine processing technology is an important link to realize standardization and standardization of Chinese herbal pieces, with urgent need to attract high attention. At present, there are still many problems in the research of processing technology of Chinese herbal pieces, mainly including inconsistent processing technology, large differences in process technology parameters, and unstable production technology of Chinese herbal pieces, resulting in uncontrollable quality of Chinese herbal pieces and affecting the clinical efficacy of Chinese medicine. This paper focused on the establishment of a unified standard processing technology, and put forward the countermeasures for the processing technology of Chinese medicine based on a comprehensive analysis of the current situations of the processing technology of Chinese herbal pieces, with significance for guiding the establishment of a standardized processing technology of Chinese medicine.


Asunto(s)
Medicamentos Herbarios Chinos/química , Medicina Tradicional China , Tecnología Farmacéutica/métodos , Control de Calidad , Estándares de Referencia , Investigación
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