RESUMO
BACKGROUND: A comprehensive overview of artificial intelligence (AI) for cardiovascular disease (CVD) prediction and a screening tool of AI models (AI-Ms) for independent external validation are lacking. This systematic review aims to identify, describe, and appraise AI-Ms of CVD prediction in the general and special populations and develop a new independent validation score (IVS) for AI-Ms replicability evaluation. METHODS: PubMed, Web of Science, Embase, and IEEE library were searched up to July 2021. Data extraction and analysis were performed for the populations, distribution, predictors, algorithms, etc. The risk of bias was evaluated with the prediction risk of bias assessment tool (PROBAST). Subsequently, we designed IVS for model replicability evaluation with five steps in five items, including transparency of algorithms, performance of models, feasibility of reproduction, risk of reproduction, and clinical implication, respectively. The review is registered in PROSPERO (No. CRD42021271789). RESULTS: In 20,887 screened references, 79 articles (82.5% in 2017-2021) were included, which contained 114 datasets (67 in Europe and North America, but 0 in Africa). We identified 486 AI-Ms, of which the majority were in development (n = 380), but none of them had undergone independent external validation. A total of 66 idiographic algorithms were found; however, 36.4% were used only once and only 39.4% over three times. A large number of different predictors (range 5-52,000, median 21) and large-span sample size (range 80-3,660,000, median 4466) were observed. All models were at high risk of bias according to PROBAST, primarily due to the incorrect use of statistical methods. IVS analysis confirmed only 10 models as "recommended"; however, 281 and 187 were "not recommended" and "warning," respectively. CONCLUSION: AI has led the digital revolution in the field of CVD prediction, but is still in the early stage of development as the defects of research design, report, and evaluation systems. The IVS we developed may contribute to independent external validation and the development of this field.
Assuntos
Inteligência Artificial , Doenças Cardiovasculares , Humanos , Doenças Cardiovasculares/diagnóstico , Medição de Risco/métodos , Programas de Rastreamento/métodos , Reprodutibilidade dos TestesRESUMO
In recent years, there has been explosive development in artificial intelligence (AI), which has been widely applied in the health care field. As a typical AI technology, machine learning models have emerged with great potential in predicting cardiovascular diseases by leveraging large amounts of medical data for training and optimization, which are expected to play a crucial role in reducing the incidence and mortality rates of cardiovascular diseases. Although the field has become a research hot spot, there are still many pitfalls that researchers need to pay close attention to. These pitfalls may affect the predictive performance, credibility, reliability, and reproducibility of the studied models, ultimately reducing the value of the research and affecting the prospects for clinical application. Therefore, identifying and avoiding these pitfalls is a crucial task before implementing the research. However, there is currently a lack of a comprehensive summary on this topic. This viewpoint aims to analyze the existing problems in terms of data quality, data set characteristics, model design, and statistical methods, as well as clinical implications, and provide possible solutions to these problems, such as gathering objective data, improving training, repeating measurements, increasing sample size, preventing overfitting using statistical methods, using specific AI algorithms to address targeted issues, standardizing outcomes and evaluation criteria, and enhancing fairness and replicability, with the goal of offering reference and assistance to researchers, algorithm developers, policy makers, and clinical practitioners.
Assuntos
Doenças Cardiovasculares , Aprendizado de Máquina , Humanos , Reprodutibilidade dos Testes , AlgoritmosRESUMO
This study aims to reveal the dynamics of the HPLC fingerprint, chromaticity values, and main chemical components of Mori Cortex during the stir-frying process. The fingerprints of raw and processed products of Mori Cortex were established. The content of mulberroside A, oxyresveratrol, kuwanon G, and kuwanon H in the samples and the chromaticity values of the samples were determined. Furthermore, the similarity evaluation of fingerprints and the correlation analysis between fingerprints and chromaticity values were carried out. The results showed that the fingerprints of raw and processed products of Mori Cortex had high similarity, and the overall changes in the content of the main chemical components in the stir-frying process were similar. According to the experience, when the stir-frying is moderate, the total chromaticity value difference |ΔE~*_(ab)| is above 1.5. With the extension of stir-frying time, the L~* and E~*_(ab) values keep decreasing, and the a~* value keeps increasing. The results of the correlation analysis between fingerprints and chromaticity values showed that peaks 1(5-hydroxy maltol), 2(mulberroside A), 3, 4, 6, 7, 11(oxyresveratrol), 14, 17(kuwanon G), and 18(kuwanon H) had significant correlations with the chromaticity values. Quantitative analysis of the four components with higher content showed that the content of the four components decreased to varying degrees when the stir-frying was excessive. In addition, 5-hydroxy maltol was produced after stir-frying of Mori Cortex, and the fingerprint and chromaticity values showed regular changes during the stir-frying process. The chromaticity can be included in the evaluation of the stir-frying process of Mori Cortex, which provides a reference for standardizing the quality of stir-fried Mori Cortex.
Assuntos
Medicamentos de Ervas Chinesas , Morus , Cromatografia Líquida de Alta Pressão , Medicamentos de Ervas Chinesas/química , Medicamentos de Ervas Chinesas/análise , Morus/química , Dissacarídeos , EstilbenosRESUMO
In order to comprehensively evaluate the quality of Viticis Fructus, this study established HPLC fingerprints and evaluated the quality of 24 batches of Viticis Fructus samples from different species by similarity evaluation and multivariate statistical analysis(PCA, HCA, PLS-DA). On this basis, an HPLC method was established to compare the content differences of the main components, including casticin, agnuside, homoorientin, and p-hydroxybenzoic acid. The analysis was performed on the chromatographic column(Waters Symmetry C_(18)) with a gradient mobile phase of acetonitrile(A)-0.05% phosphoric acid solution(B) at the flow rate of 1 mL·min~(-1) and detection wavelength of 258 nm. The column temperature was 30 â and the injection volume was 10 µL. The HPLC fingerprint of 24 batches of Viticis Fructus samples was established with 21 common peaks, and nine peaks were identified. Similarity analysis was carried out based on chromatographic data of 24 batches of chromatographic data of Viticis Fructus, and the results showed that except for DYMJ-16, the similarity of Vitex trifolia var. simplicifolia was ≥0.900, while that of V. trifolia was ≤0.864. In addition, the similarity analysis of two different species showed that the similarity of 16 batches of V. trifolia var. simplicifolia was 0.894-0.997 and that of the eight batches of V. trifolia was between 0.990 and 0.997. The results showed that the similarity of fingerprints of these two species was different, but the similarity between the same species was good. The results of the three multivariate statistical analyses were consistent, which could distinguish the two different species. The VIP analysis results of PLS-DA showed that casticin and agnuside contributed the most to the distinction. The content determination results showed that there was no significant difference in the content of homoorientin and p-hydroxybenzoic acid in Viticis Fructus from different species, but the content of casticin and agnuside was significantly different in different species(P<0.01). The content of casticin was higher in V. trifolia var. simplicifolia, while agnuside was higher in V. trifolia. The findings of this study show that there are differences in fingerprint similarity and component content of Viticis Fructus from different species, which can provide references for the in-depth study of the quality and clinical application of Viticis Fructus.
Assuntos
Medicamentos de Ervas Chinesas , Vitex , Medicamentos de Ervas Chinesas/química , Cromatografia Líquida de Alta Pressão/métodos , Frutas/química , Vitex/químicaRESUMO
This research investigates the characteristics of spontaneous brain activity in dysthyroid optic neuropathy patients using the regional homogeneity technique. Sixteen patients with dysthyroid optic neuropathy and 16 thyroid-associated ophthalmopathy patients without dysthyroid optic neuropathy were recruited, matched for weight, height, age, sex, and educational level. All participants underwent resting-state functional nuclear resonance imaging, and the characteristics of spontaneous brain activity were evaluated using the regional homogeneity technique. Each participant in the dysthyroid optic neuropathy group also completed the Hospital Anxiety and Depression scale. Receiver operating characteristic curves were used to compare brain activity between the two groups. Pearson correlation analysis evaluated the relationship between regional homogeneity and clinical manifestations in dysthyroid optic neuropathy patients. In addition, we analyzed the correlation between Hospital Anxiety and Depression scale and regional homogeneity. We found that the regional homogeneity values at the corpus callosum/cingulate gyrus and parietal lobe/middle frontal gyrus significantly decreased in dysthyroid optic neuropathy patients. Regional homogeneity values at the corpus callosum/cingulate gyrus and parietal lobe/middle frontal gyrus were negatively correlated with Hospital Anxiety and Depression scale and disease duration. It was found that the regional homogeneity signal values were significantly lower than in thyroid-associated ophthalmopathy without in dysthyroid optic neuropathy, which may indicate a risk of regional brain dysfunction in dysthyroid optic neuropathy. The results show that regional homogeneity has the potential for early diagnosis and prevent dysthyroid optic neuropathy. In addition, the findings suggest possible mechanisms of dysthyroid optic neuropathy optic nerve injury. They may provide a valuable basis for further research on the pathological mechanisms of dysthyroid optic neuropathy.
Assuntos
Córtex Cerebral/fisiopatologia , Conectoma , Corpo Caloso/fisiopatologia , Oftalmopatia de Graves/fisiopatologia , Rede Nervosa/fisiopatologia , Doenças do Nervo Óptico/fisiopatologia , Córtex Cerebral/diagnóstico por imagem , Corpo Caloso/diagnóstico por imagem , Feminino , Oftalmopatia de Graves/diagnóstico por imagem , Humanos , Imageamento por Ressonância Magnética , Masculino , Pessoa de Meia-Idade , Rede Nervosa/diagnóstico por imagem , Doenças do Nervo Óptico/diagnóstico por imagemRESUMO
An UPLC-MS/MS method was developed to simultaneously determine complanatoside A and complanatoside B in rat plasma with rutin as the internal standard and applied to examine the effect of salt-processing on pharmacokinetics of these two flavonoid glycosides. The pharmacokinetic parameters were estimated using DAS 3.2.6 and subjected to independent sample t-test with SPSS 23.0. No significant difference in T_(max) of complanatoside B was observed between the raw and processed groups; however, in the processed group, C_(max) and AUC_(0-12 h) of complanatoside B increased obviously(P<0.05), while MRT_(0-12 h) decreased from(3.34±0.44) h to(1.81±0.36) h(P<0.05). C_(max) [(14.72±11.13) µg·L~(-1)] and MRT_(0-24) [(3.93±0.26) h] of complanatoside A in the raw group were statistically different from those [(35.64±21.99) µg·L~(-1),(1.43±0.24) h] in the processed group(P<0.05). As a result, salt-processing can facilitate the in vivo adsorption and accelerate the excretion of complanatoside A and complanatoside B.
Assuntos
Astrágalo , Espectrometria de Massas em Tandem , Animais , Cromatografia Líquida de Alta Pressão , Cromatografia Líquida , Glicosídeos , Ratos , SêmenRESUMO
BACKGROUND The aim of this study was to explore potential changes in brain function network activity in patients with adult strabismus with amblyopia (SA) using the voxel-wise degree centrality (DC) method. MATERIAL AND METHODS We enrolled 15 patients with SA (6 males, 9 females) and 15 sex-matched healthy controls (HCs). All subjects completed resting functional magnetic resonance imaging scans. Independent-sample t tests and receiver operating characteristic (ROC) curves were used to assess DC value differences between groups, and Pearson correlation analysis was performed to evaluate correlations between DC-changed brain regions and clinical data of patients with SA. RESULTS Compared with the HC group, DC values that were lower in patients with SA included the left middle frontal gyrus and bilateral angular gyri. Increases were observed in the left fusiform gyrus, right lingual gyrus, right middle occipital gyrus, right postcentral gyrus, and left paracentral lobule. However, DC values were not correlated with clinical manifestations. ROC curve analysis showed high accuracy. CONCLUSIONS We found abnormal neural activity in specific brain regions in patients with SA. Specifically, we observed significant changes in DC values compared to HCs. These changes may be useful to identify the specific mechanisms involved in brain dysfunction in SA.
Assuntos
Ambliopia/diagnóstico por imagem , Ambliopia/fisiopatologia , Encéfalo/fisiopatologia , Imageamento por Ressonância Magnética , Rede Nervosa/fisiopatologia , Descanso , Estrabismo/diagnóstico por imagem , Estrabismo/fisiopatologia , Adulto , Ambliopia/complicações , Encéfalo/diagnóstico por imagem , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Rede Nervosa/diagnóstico por imagem , Curva ROC , Estrabismo/complicações , Adulto JovemRESUMO
BACKGROUND We used fractional amplitude of low-frequency fluctuation (fALFF) technology to investigate spontaneous cerebral activity in patients with monocular blindness (MB) and in healthy controls (HCs). MATERIAL AND METHODS Thirty MB patient and 15 HCs were included in this study. All subjects were scanned by resting-state functional magnetic resonance imaging (rs-fMRI). The independent sample t test and chi-squared test were applied to analyze demographics of MB patients and HCs. The 2-sample t test and receiver operating characteristic (ROC) curves were applied to identify the difference in average fALFF values between MB patients and HCs. Pearson's correlation analysis was applied to explore the relationship between the average fALFF values of brain areas and clinical behavior in the MB group. RESULTS MB patients had lower fALFF values in the left anterior cingulate and higher fALFF values in the left precuneus and right and left inferior parietal lobes than in HCs. Moreover, the mean fALFF values of MB patients in the left anterior cingulate had negative correlations with the anxiety scale score (r=-0.825, P<0.001) and the depression scale score (r=-0.871, P<0.001). CONCLUSIONS Our study found that MB patients had abnormal spontaneous activities in the visual and vision-related regions. The finding of abnormal neuronal activity helps to reveal the underlying neuropathologic mechanisms of vision loss.
Assuntos
Cegueira/diagnóstico por imagem , Imageamento por Ressonância Magnética/métodos , Cegueira/fisiopatologia , Mapeamento Encefálico/métodos , Estudos de Casos e Controles , Feminino , Humanos , Masculino , Pessoa de Meia-IdadeRESUMO
The difference in pharmacological activities and active components between leaves, barks and flowers of Eucommia ulmoides(EU) are still unclear. However, clarifying the differences in pharmacological effects of different parts of EU is of great significance for the development of EU products, and their corresponding active components provide basis for quality control of different parts of EU. Based on the chemical compositions of different parts of EU, integrated strategy of target prediction and target analysis of the compounds was used to investigate the difference in the pharmacological effects of leaves, barks and followers. The "component-target-function" association network was constructed to mine the specific material basis corresponding to specific efficacy of different parts of EU. In this study, the author found that EU may have the activities of anti-oxidation, neuromodulation, blood pressure regulation, myo-cardial expansion, and anti-apoptosis according to target prediction and function analysis. However, the effects of different parts of EU were different. Leaves were involved in the process of bone development such as osteoblast differentiation and bone mineralization in a specific way. In addition, the leaves may affect the process of bone development by regulating the metabolism of vitamin D and affecting the absorption of calcium. Leaves may also specifically act on estrogen and estradiol response processes where estrogen receptors were involved. Regarding its protective function for the liver, leaves may play a role by regulating vitamin A-related pathways. As compared with leaves, the specific pharmacological effects of barks may be related to the development of the urinary system. Flowers specifically participate in functions related to pain sensation, glutamate signaling pathway, and excitatory postsynaptic potential. Based on the hie-rarchical network of "component-target-pathway", we further found that specific activities of different parts of EU were inseparable from its specific chemical compositions. Phenylpropanoids, terpenoids and rings, iridoids, flavonoids and other components which are specific in leaves can target the specific effects of leaves, while the flavonoids in barks and the quinones in flowers may be the material basis for their respective specific effects. The prediction of the activities of different parts of EU provides a new basis for the focuses and differences in subsequent Eucommia product development. At the same time, the material basis research based on differential efficacy also provides a basis for the quality control of Eucommia differentiated products.
Assuntos
Eucommiaceae , Preparações Farmacêuticas , Flavonoides , Iridoides , Folhas de PlantaRESUMO
To date, 205 compounds have been identified from different medicinal parts of Eucommia ulmoides, including lignans, iridoid terpenoids, phenols, flavonoids, terpenoids and steroids, polysaccharides and others. Their pharmacological effects include blood pressure-lowering, blood sugar-lowering, blood lipids-regulating, prevention of osteoporosis, anti-inflammation, liver protection, anti-cancer and so on. Their efficacy and mechanism from different parts are slightly different. In this paper, the chemical composition, pharmacological action and mechanism of different parts of E. ulmoides were systematically summarized, as well as its quality control and processing research, to provide theoretical basis for further rational development and utilization of E. ulmoides.
Assuntos
Eucommiaceae/química , Compostos Fitoquímicos/química , Compostos Fitoquímicos/farmacologia , Flavonoides , Iridoides , Lignanas , Fenóis , Plantas Medicinais/química , Polissacarídeos , Esteroides , TerpenosRESUMO
Basing on chromatographic separation techniques, fifteen aglycones (1-15), including two new anthraquinone aglycones (1, 2) and thirteen known compounds (3-15), were isolated from the small polar fraction of Cassia obtusefolia (petroleum ether extract). Structural elucidations were performed by 1D/2D NMR spectroscopy and mass spectrometry. The in vitro antioxidant and α-glucosidase inhibitory activities of these fifteen compounds were determined. Except compounds 12 (IC50 3.03⯱â¯0.31⯵g/mL, stronger than ascorbic acid, which IC50 was 6.48⯱â¯2.30⯵g/mL) and 13 (IC50 78.40⯱â¯2.39⯵g/mL), the free radical scavenging capacities of other compounds were weak. Compounds 4, 5, 6 and 13 exhibited inhibitory activities on α-glucosidase with IC50 values of 50.60⯱â¯1.10, 22.57⯱â¯0.07, 60.09⯱â¯1.40, and 80.01⯱â¯2.66⯵g/mL separately, however, all the α-glucosidase inhibitory activities were weaker than positive control (acarbose).
Assuntos
Antioxidantes/uso terapêutico , Cassia/química , Sementes/química , alfa-Glucosidases/metabolismo , Antioxidantes/farmacologia , Estrutura MolecularRESUMO
To clarify the change and development of original plants of " Manjingzi"( Viticis Fructus),a traditional Chinese medicine,we investigated Vitex species on the ancient Chinese herbal texts. The study concluded that the Vitex trifolia and V. trifolia var.simplicifolia included in the Chinese Pharmacopoeia( 2015 edition) are only two sources of ancient medicinal Viticis Fructus. There are many sources of vines used in ancient times,which are not fixed and unified. The early use of Viticis Fructus is likely to be the V. quinate var. quinata,V. negundo var. cannabifolia and V. negundo var. negundo. From the Tang Dynasty,the use of V. trifolia var. simplicifolia has been appeared. Until Li Shizhen of the Ming Dynasty,the V. trifolia has been used as a source of medicine for the Viticis Fructus,but even so,the source of medicinal plants of Viticis Fructus has not been unified. We suggested V. trifolia var. simplicifolia be used as mainly species for " Manjingzi" due to its widely used in ancient China.
Assuntos
Medicamentos de Ervas Chinesas/história , Plantas Medicinais , Vitex , China , Frutas , História do Século XV , História Medieval , Medicina Tradicional Chinesa , Farmacopeias como AssuntoRESUMO
An UPLC-MS/MS method simultaneously determining contents of quercetin-3-O-ß-D-glucose-7-O-ß-D-gentiobioside and sinapic acid in rats' plasma was firstly established and applied to study the effects of processing on pharmacokinetics of Descurainiae Semen's active constituents. Complantatoside A as internal standard,methanol used for protein precipitation,the method was validated according to the instructions of CFDA. Rats' plasma was collected after being oral administrated equal dosage of 60% ethanal extract of raw or processed Descurainiae Semen at different point of time,then the concentrations were determined to calculate pharmacokinetic parameters using DAS 3. 2. 6. And the parameters were analyzed using SPSS 23. 0,meantime the concentration-time curve was drawn.The results showed that processing had no effects on the pharmacokinetics of QGG,but could improve the absorption of sinapic acid and slow down the excretion.
Assuntos
Medicamentos de Ervas Chinesas/farmacocinética , Animais , Cromatografia Líquida de Alta Pressão , Cromatografia Líquida , Ratos , Ratos Sprague-Dawley , Espectrometria de Massas em TandemRESUMO
Chemical constituents of the Fufang Huangbai Ye( FFHB) were analyzed and identified by UPLC-ESI-LTQ-OrbitrapMS. The analysis was performed on an Waters HSS T3 reverse phase column( 2. 1 mm×100 mm,1. 8 µm). The mobile phase consisting of 0. 1% aqueous formic acid( A) and acetonitrile( B) was used with gradient elution,and the flow rate was 0. 3 mL·min~(-1).Based on the information of the accurate mass,the multistage fragment ions,the mass spectrometric data of the standard substance and the relative reference literature,the structure of the chemical constituents in FFHB were identified. Based on the identified compounds,network pharmacology study,including target prediction,functional enrichment,and molecular docking was applied to screen out the main active substances for treatment of diabetes foot and explore the potential mechanism. The results showed that a total of 138 compounds were identified,including 28 alkaloids,16 flavonoids,11 phenylethanoid glycosides,9 cycloolefins,11 cyclohexylethanol derivatives,28 phenolic acids and derivatives,3 lignans,4 terpenes,28 volatile oils and the others. Further,36 active substances for diabetes foot were screened out,and the functional enrichment showed the potential mechanism of FFHB were mainly seven functional items including inflammatory response,growth factor activity. This study combining the UPLC-LTQ-Orbitrap-MS technology and the network pharmacology provide a useful reference and basis for active compounds,quality control markers and the pharmacological mechanism of FFHB for diabetic foot treatment.
Assuntos
Pé Diabético/tratamento farmacológico , Medicamentos de Ervas Chinesas/farmacologia , Compostos Fitoquímicos/farmacologia , Cromatografia Líquida de Alta Pressão , Humanos , Espectrometria de Massas , Simulação de Acoplamento Molecular , Compostos Fitoquímicos/isolamento & purificaçãoRESUMO
References and our previous experiment showed that the contents of glycosides were significantly decreasedï¼while the contents of aglycones were significantly increased after processing of Cassiae Semen.It may be related to its glycosidases or the heating process. In order to investigate the reasons, high performance liquid chromatographic (HPLC) was used to study the effects of these two factors on contents of Cassiae Semen's main chemical components in processing. The results showed that glycoside hydrolases was present in Cassiae Semen and could rapidly hydrolyze glycosides from Cassiae Semen into aglycones in suitable temperature with sufficient water.Howeverï¼it didn't show effect on contents change of main constituents in the procedure of Cassiae Semen processing.The reason for content decrease of glycosides and content increase of aglycones in processed Cassiae Semen was glycoside bond cracking to produce corresponding aglycone at high temperature.This study further provides basis for further revealing of the processing mechanism of Cassiae Semen.
Assuntos
Cassia/química , Medicamentos de Ervas Chinesas/química , Glicosídeos/química , Química Farmacêutica , Cromatografia Líquida de Alta PressãoRESUMO
A new flavonoid glycoside, named complanatoside C (1), and 19 known compounds (2-20) were isolated from an 95% ethanol extract of Astragali Semen by various chromatographic methods. Their structures were identified on the basis of UV, IR, NMR, MS spectroscopic data analysis, and comparison with those in literature, including fifteen flavonoid glycoside (1-15), and six other constituents (16-20), among which compounds 16-19 were isolated from this plant for the first time.
Assuntos
Astrágalo/química , Flavonoides/análise , Glicosídeos/análise , Sementes/química , Estrutura Molecular , Compostos Fitoquímicos/análiseRESUMO
To investigate the effect of distant metastases sites on survival in patients with de novo stage-IV breast cancer. From 2010 to 2013, patients with a diagnosis of de novo stage-IV breast cancer were identified using the Surveillance, Epidemiology, and End Results database. Univariate and multivariate Cox regression analyses were performed to analyze the effect of distant metastases sites on breast cancer-specific survival and overall survival. A total of 7575 patients were identified. The most common metastatic sites were bone, followed by lung, liver, and brain. Patients with hormone receptor+/human epidermal growth factor receptor 2- and hormone receptor+/human epidermal growth factor receptor 2+ status were more prone to bone metastases. Lung and brain metastases were common in hormone receptor-/human epidermal growth factor receptor 2+ and hormone receptor-/human epidermal growth factor receptor 2- subtypes, and patients with hormone receptor+/ human epidermal growth factor receptor 2+ and hormone receptor-/human epidermal growth factor receptor 2+ subtypes were more prone to liver metastases. Patients with liver and brain metastases had unfavorable prognosis for breast cancer-specific survival and overall survival, whereas bone and lung metastases had no effect on patient survival in multivariate analyses. The hormone receptor-/human epidermal growth factor receptor 2- subtype conferred a significantly poorer outcome in terms of breast cancer-specific survival and overall survival. hormone receptor+/human epidermal growth factor receptor 2+ disease was associated with the best prognosis in terms of breast cancer-specific survival and overall survival. Patients with liver and brain metastases were more likely to experience poor prognosis for breast cancer-specific survival and overall survival by various breast cancer subtypes. Distant metastases sites have differential impact on clinical outcomes in stage-IV breast cancer. Follow-up screening for brain and liver metastases might be effective in improving breast cancer-specific survival and overall survival.
Assuntos
Neoplasias Ósseas/epidemiologia , Neoplasias Encefálicas/epidemiologia , Neoplasias da Mama/epidemiologia , Neoplasias Hepáticas/epidemiologia , Neoplasias Pulmonares/epidemiologia , Neoplasias Ósseas/genética , Neoplasias Ósseas/patologia , Neoplasias Ósseas/secundário , Neoplasias Encefálicas/genética , Neoplasias Encefálicas/patologia , Neoplasias Encefálicas/secundário , Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Feminino , Humanos , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/secundário , Neoplasias Pulmonares/genética , Neoplasias Pulmonares/patologia , Neoplasias Pulmonares/secundário , Metástase Neoplásica , Estadiamento de Neoplasias , Prognóstico , Modelos de Riscos Proporcionais , Receptor ErbB-2 , Receptores de Estrogênio/genética , Receptores de Progesterona/genética , Programa de SEERRESUMO
The pathogenesis of alcoholic fatty liver (AFL) disease is associated with the excessive accumulation of lipids in hepatocytes as well as oxidative stress. Resveratrol (RES), a dietary polyphenol found in red wine and grapes, has been shown to protect against AFL disease. However, the precise mechanisms that lead to this protective effect remain elusive. In this study, we used HepG2 cells to investigate the effects of RES on lipid metabolism and the mechanisms underlying these effects. HepG2 cells were cultured with oleic acid and alcohol for 48 h to induce excessive lipid accumulation. Oil red O staining showed that administration of oleic acid and alcohol induced more lipid accumulation than was observed in the control group, and that RES (15, 45, or 135 µmol/L) treatment reduced intracellular lipid droplets. RES treatment also significantly attenuated hepatic steatosis and lowered levels of intracellular triglycerides (TG). Western blot analysis showed that RES enhanced the phosphorylation of AMP-activated protein kinase (AMPK) and acetyl-CoA carboxylase (ACC) and down-regulated the expression of sterol regulatory element-binding protein 1c (SREBP-1c) and lipin1. However, compound C, an AMPK inhibitor, reversed these effects of RES. In conclusion, RES reduced lipid accumulation and protected HepG2 cells. This effect may be associated with the down-regulation of SREBP-1c and lipin1 expression, increased levels of phosphorylated AMPK and ACC, and the activation of AMPK-lipin1 signaling.
RESUMO
BACKGROUND: Proteins in the lipin family play a key role in lipid synthesis due to their phosphatidate phosphatase activity, and they also act as transcriptional coactivators to regulate the expression of genes involved in lipid metabolism. The lipin family includes three members, lipin1, lipin2, and lipin3, which exhibit tissue-specific expression, indicating that they may have distinct roles in mediating disease. To date, most studies have focused on lipin1, whereas the roles of lipin2 and lipin3 are less understood. SUMMARY: This review introduces the structural characteristics, physiological functions, relationship to lipid metabolism, and patterns of expression of the lipin family proteins, highlighting their roles in lipid metabolic homeostasis.
Assuntos
Homeostase , Metabolismo dos Lipídeos/fisiologia , Animais , Humanos , Proteínas Nucleares/metabolismo , Compostos Orgânicos/metabolismo , Fosfatidato Fosfatase/metabolismoRESUMO
OBJECTIVE: To discriminate Descurainiae Semen and Pantagirus Semen. METHOD: A high-performance liquid chromatographic method was developed to establish the fingerprint of Descurainiae Semen, and hierarchical cluster analysis (HCA) and partial least squares discriminant analysis (PLS-DA) were applied to study HPLC fingerprinting and chemical recognition. RESULT: There exists large difference of chromatographic peaks and its relative peak area of HPLC fingerprints between Descurainiae Semen and Pantagirus Semen, and after conducting statistical analysis, the result demonstrated that all samples were classified into three categories: Descurainiae Semen, Pantagirus Semen and their mixtures. CONCLUSION: The developed HPLC fingerprint combined with chemometrics can be utilized to discriminate between Descurainiae Semen and Pantagirus Semen, which was quick, simple, accurate and reliable an can provide the basis for the characterization and quality assess of Descurainiae Semen and Pantagirus Semen.