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1.
Analyst ; 149(6): 1837-1848, 2024 Mar 11.
Artigo em Inglês | MEDLINE | ID: mdl-38345564

RESUMO

Radix glycyrrhizae (licorice) is extensively employed in traditional Chinese medicine, and serves as a crucial raw material in industries such as food and cosmetics. The quality of licorice from different origins varies greatly, so classification of its geographical origin is particularly important. This study proposes a technique for fine structure recognition and segmentation of hyperspectral images of licorice using deep learning U-Net neural networks to segment the tissue structure patterns (phloem, xylem, and pith). Firstly, the three partitions were separately labeled using the Labelme tool, which was utilized to train the U-Net model. Secondly, the obtained optimal U-Net model was applied to predict three partitions of all samples. Lastly, various machine learning models (LDA, SVM, and PLS-DA) were trained based on segmented hyperspectral data. In addition, a threshold method and a circumcircle method were applied to segment licorice hyperspectral images for comparison. The results revealed that compared with the threshold segmentation method (which yielded SVM classifier accuracies of 99.17%, 91.15%, and 92.50% on the training set, validation set, and test set, respectively), the U-Net segmentation method significantly enhanced the accuracy of origin classification (99.06%, 94.72% and 96.07%). Conversely, the circumcircle segmentation method did not effectively improve the accuracy of origin classification (99.65%, 91.16% and 92.13%). By integrating Raman imaging of licorice, it can be inferred that the U-Net model, designed for region segmentation based on the inherent tissue structure of licorice, can effectively improve the accuracy origin classification, which has positive significance in the development of intelligence and information technology of Chinese medicine quality control.


Assuntos
Glycyrrhiza , Imageamento Hiperespectral , Glycyrrhiza/química , Redes Neurais de Computação , Aprendizado de Máquina , Raízes de Plantas , Processamento de Imagem Assistida por Computador/métodos
2.
Sensors (Basel) ; 24(11)2024 May 27.
Artigo em Inglês | MEDLINE | ID: mdl-38894248

RESUMO

Red ginseng is widely used in food and pharmaceuticals due to its significant nutritional value. However, during the processing and storage of red ginseng, it is susceptible to grow mold and produce mycotoxins, generating security issues. This study proposes a novel approach using hyperspectral imaging technology and a 1D-convolutional neural network-residual-bidirectional-long short-term memory attention mechanism (1DCNN-ResBiLSTM-Attention) for pixel-level mycotoxin recognition in red ginseng. The "Red Ginseng-Mycotoxin" (R-M) dataset is established, and optimal parameters for 1D-CNN, residual bidirectional long short-term memory (ResBiLSTM), and 1DCNN-ResBiLSTM-Attention models are determined. The models achieved testing accuracies of 98.75%, 99.03%, and 99.17%, respectively. To simulate real detection scenarios with potential interfering impurities during the sampling process, a "Red Ginseng-Mycotoxin-Interfering Impurities" (R-M-I) dataset was created. The testing accuracy of the 1DCNN-ResBiLSTM-Attention model reached 96.39%, and it successfully predicted pixel-wise classification for other unknown samples. This study introduces a novel method for real-time mycotoxin monitoring in traditional Chinese medicine, with important implications for the on-site quality control of herbal materials.


Assuntos
Micotoxinas , Redes Neurais de Computação , Panax , Panax/química , Micotoxinas/análise , Micotoxinas/química , Imageamento Hiperespectral/métodos
3.
Sensors (Basel) ; 23(23)2023 Nov 23.
Artigo em Inglês | MEDLINE | ID: mdl-38067717

RESUMO

The quality assurance of bulk medicinal materials, crucial for botanical drug production, necessitates advanced analytical methods. Conventional techniques, including high-performance liquid chromatography, require extensive pre-processing and rely on extensive solvent use, presenting both environmental and safety concerns. Accordingly, a non-destructive, expedited approach for assessing both the chemical and physical attributes of these materials is imperative for streamlined manufacturing. We introduce an innovative method, designated as Squeeze-and-Excitation Residual Network Combined Hyperspectral Image Analysis (SE-ReHIA), for the swift and non-invasive assessment of the chemical makeup of bulk medicinal substances. In a demonstrative application, hyperspectral imaging in the 389-1020 nm range was employed in 187 batches of Salvia miltiorrhiza. Notable constituents such as salvianolic acid B, dihydrotanshinone I, cryptotanshinone, tanshinone IIA, and moisture were quantified. The SE-ReHIA model, incorporating convolutional layers, maxpooling layers, squeeze-and-excitation residual blocks, and fully connected layers, exhibited Rc2 values of 0.981, 0.980, 0.975, 0.972, and 0.970 for the aforementioned compounds and moisture. Furthermore, Rp2 values were ascertained to be 0.975, 0.943, 0.962, 0.957, and 0.930, respectively, signifying the model's commendable predictive competence. This study marks the inaugural application of SE-ReHIA for Salvia miltiorrhiza's chemical profiling, offering a method that is rapid, eco-friendly, and non-invasive. Such advancements can fortify consistency across botanical drug batches, underpinning product reliability. The broader applicability of the SE-ReHIA technique in the quality assurance of bulk medicinal entities is anticipated with optimism.


Assuntos
Medicamentos de Ervas Chinesas , Salvia miltiorrhiza , Salvia miltiorrhiza/química , Imageamento Hiperespectral , Reprodutibilidade dos Testes , Cromatografia Líquida de Alta Pressão/métodos
4.
Molecules ; 27(20)2022 Oct 17.
Artigo em Inglês | MEDLINE | ID: mdl-36296563

RESUMO

Coupled with the convolutional neural network (CNN), an intelligent Raman spectroscopy methodology for rapid quantitative analysis of four pharmacodynamic substances and soluble solid in the manufacture process of Guanxinning tablets was established. Raman spectra of 330 real samples were collected by a portable Raman spectrometer. The contents of danshensu, ferulic acid, rosmarinic acid, and salvianolic acid B were determined with high-performance liquid chromatography-diode array detection (HPLC-DAD), while the content of soluble solid was determined by using an oven-drying method. In the establishing of the CNN calibration model, the spectral characteristic bands were screened out by a competitive adaptive reweighted sampling (CARS) algorithm. The performance of the CNN model is evaluated by root mean square error of calibration (RMSEC), root mean square error of cross-validation (RMSECV), root mean square error of prediction (RMSEP), coefficient of determination of calibration (Rc2), coefficient of determination of cross-validation (Rcv2), and coefficient of determination of validation (Rp2). The Rp2 values for soluble solid, salvianolic acid B, danshensu, ferulic acid, and rosmarinic acid are 0.9415, 0.9246, 0.8458, 0.8667, and 0.8491, respectively. The established model was used for the analysis of three batches of unknown samples from the manufacturing process of Guanxinning tablets. As the results show, Raman spectroscopy is faster and more convenient than that of conventional methods, which is helpful for the implementation of process analysis technology (PAT) in the manufacturing process of Guanxinning tablets.


Assuntos
Aprendizado Profundo , Análise Espectral Raman , Espectroscopia de Luz Próxima ao Infravermelho/métodos , Comprimidos , Controle de Qualidade , Análise dos Mínimos Quadrados , Ácido Rosmarínico
5.
Arch Toxicol ; 94(1): 273-293, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31720699

RESUMO

Recent evidence suggests herbal-induced liver injury (HILI) to account for 20% of cases among the U.S. Drug-Induced-Liver-Injury-Network. To define injury patterns of HILI, we reviewed the clinical data of 413 patients exposed to 53 HDS products by considering the evidence for HILI and its grades of severity. Outstandingly, females developed HILI more rapidly (p = 0.018) and the time to recovery was significantly increased (p = 0.0153). > 90% of reported cases were severe and half of HDS products caused acute liver failure (ALF) requiring liver transplantation or resulted in fatal outcomes. Liver biopsies of 243 patients defined 13 histological features; two-thirds of products elicited immune-mediated hepatitis and included 154 Hy's law positive cases. The histological injury patterns were confirmed among unrelated patients, while accidental re-challenges evidenced culprits as causative. Furthermore, one-fifth of patients presented elevated autoantibody titres indicative of autoimmune-like HILI, and one-third of the products were linked to chronic hepatitis and cholestatic injuries not resolving within 6 months. Lastly, INR and TBL are critical laboratory parameters to predict progression of severe HILI to ALF. Our study highlights the need for a regulatory framework to minimize the risk for HILI. Better education of the public and a physician-supervised self-medication plan will be important measures to abate risk of HILI.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas/complicações , Suplementos Nutricionais/efeitos adversos , Hepatite/etiologia , Preparações de Plantas/efeitos adversos , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Biópsia , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Doença Hepática Induzida por Substâncias e Drogas/imunologia , Criança , Pré-Escolar , Colestase/induzido quimicamente , Feminino , Hepatite/imunologia , Humanos , Lactente , Falência Hepática Aguda/induzido quimicamente , Falência Hepática Aguda/imunologia , Pessoa de Meia-Idade , Adulto Jovem
6.
Int J Mol Sci ; 19(10)2018 Sep 28.
Artigo em Inglês | MEDLINE | ID: mdl-30274144

RESUMO

The growing use of herbal dietary supplements (HDS) in the United States provides compelling evidence for risk of herbal-induced liver injury (HILI). Information on HDS products was retrieved from MedlinePlus of the U.S. National Library of Medicine and the herbal monograph of the European Medicines Agency. The hepatotoxic potential of HDS was ascertained by considering published case reports. Other relevant data were collected from governmental documents, public databases, web sources, and the literature. We collected information for 296 unique HDS products. Evidence of hepatotoxicity was reported for 67, that is 1 in 5, of these HDS products. The database revealed an apparent gender preponderance with women representing 61% of HILI cases. Culprit hepatotoxic HDS were mostly used for weight control, followed by pain and inflammation, mental stress, and mood disorders. Commonly discussed mechanistic events associated with HILI are reactive metabolites and oxidative stress, mitochondrial injury, as well as inhibition of transporters. HDS⁻drug interactions, causing both synergistic and antagonizing effects of drugs, were also reported for certain HDS. The database contains information for nearly 300 commonly used HDS products to provide a single-entry point for better comprehension of their impact on public health.


Assuntos
Doença Hepática Induzida por Substâncias e Drogas/patologia , Bases de Dados Factuais , Suplementos Nutricionais/efeitos adversos , Preparações de Plantas/efeitos adversos , Interações Ervas-Drogas , Humanos , Publicações
7.
Zhongguo Zhong Yao Za Zhi ; 39(13): 2495-7, 2014 Jul.
Artigo em Zh | MEDLINE | ID: mdl-25276970

RESUMO

It is the objective of this study to optimize the extraction process of red ginseng to minimize the unit cost of extracting effective ingredients. The relation between the target variables of total quantity of ginsenosides and first extraction time, first extraction solution amount, second extraction time, second extract solution amount were studied with Box-Behnken experimental design method. At the same we also considered the cost of extraction solution and energy usage. The objective function was set as unit cost of target (total quantity of ginsenosides or its purity) for the multi-objective optimization of extraction process. As a result, the optimal process parameters were found as first extraction time (108.7 min), first extraction solution amount folds (12), second extraction time (30 min), second extraction solution amount folds (8) to minimize the unit cost. It indicated that this approach could potentially be used to optimize industrial extraction process for manufacturing Chinese medicine.


Assuntos
Química Farmacêutica/economia , Química Farmacêutica/métodos , Medicamentos de Ervas Chinesas/isolamento & purificação , Panax/química , Controle de Custos , Medicamentos de Ervas Chinesas/análise , Medicamentos de Ervas Chinesas/economia
8.
Zhongguo Zhong Yao Za Zhi ; 39(14): 2660-4, 2014 Jul.
Artigo em Zh | MEDLINE | ID: mdl-25272491

RESUMO

It is the objective of this study to develop dynamic predictive model for the extraction process of red Ginseng using NIR spectroscopy. NIR spectroscopy was collected online and PLSR models were developed for total quantity of ginsenosides. The performance of NIR prediction model achieved R, RMSEC, RMSEP of 0.996 09, 0.018 9, 0.016 8, respectively. A first order dynamic mass transfer model was combined with NIR prediction of the quality indicator to predict the trajectory of the extraction process based upon the initial 3 or 4 data points. The results showed good agreement with actual measurements indicating reasonable accuracy of the predictive model. It could potentially be used for advanced predictive control of the extraction process.


Assuntos
Fracionamento Químico/métodos , Ginsenosídeos/isolamento & purificação , Modelos Teóricos , Panax/química , Espectroscopia de Luz Próxima ao Infravermelho , Ginsenosídeos/química
9.
Zhongguo Zhong Yao Za Zhi ; 39(17): 3287-90, 2014 Sep.
Artigo em Zh | MEDLINE | ID: mdl-25522613

RESUMO

A set of central composite design experiments were designed by using four factors which were ethanol amount, ethanol concentration, refrigeration temperature and refrigeration time. The relation between these factors with the target variables of the retention rate of schizandrol A, the soluble solids content, the removal rate of fructose and the removal rate of glucose were analyzed with Bayesian networks, and ethanol amount and ethanol concentration were found as the critical process parameters. Then a network model was built with 2 inputs and 4 outputs using back propagation artificial neural networks which was optimized by genetic algorithms. The R2 and MSE from the training set were 0.983 8 and 0.001 1. The R2 and MSE from the test set were 0.975 9 and 0.001 8. The results showed that network analysis method could be used for modeling of Schisandrae Chinensis Fructus ethanol precipitation process and identify critical operating parameters.


Assuntos
Teorema de Bayes , Etanol/química , Frutas/química , Schisandra/química , Precipitação Química , Temperatura Baixa , Ciclo-Octanos/química , Frutose/análise , Glucose/análise , Lignanas/química , Redes Neurais de Computação , Compostos Policíclicos/química , Reprodutibilidade dos Testes , Fatores de Tempo
10.
Spectrochim Acta A Mol Biomol Spectrosc ; 287(Pt 2): 122083, 2023 Feb 15.
Artigo em Inglês | MEDLINE | ID: mdl-36371812

RESUMO

Bed collapse is a serious problem in a fluid-bed granulation process of traditional Chinese medicine. Moisture content and size distribution are regarded as two pivotal influencing factors. Herein, a smart hyperspectral image analysis methodology was established via deep residual network (ResNet) algorithm, which was then applied to monitoring moisture content, size distribution and contents of four bioactive compounds of granules in the fluid-bed granulation process of Guanxinning tablets. First, a hyperspectral imaging camera was utilized to acquire hyperspectral images of 132 real granule samples in the spectral region of 389-1020 nm. Second, the moisture content and size distribution of the granules were measured with a laser particle sizer and a fast moisture analyzer, respectively. Moreover, the contents of danshensu, ferulic acid, rosmarinic acid and salvianolic acid B of the granules were determined by using high-performance liquid chromatography-diode array detection. Third, ResNet quantitative calibration models were built, which consisted of convolutional layer, maxpooling layer, four convolutional blocks with residual learning function and two fully connected layers. As a result, the Rc2 values for the moisture content, granule sizes and contents of four bioactive compounds are determined to be 0.957, 0.986, 0.936, 0.959, 0.937, 0.938, 0.956, 0.889, 0.914 and 0.928, whereas the Rp2 values are calculated as 0.940, 0.969, 0.904, 0.930, 0.925, 0.928, 0.896, 0.849, 0.844, and 0.905, respectively. The predicted values matched well with the measured values. These findings indicated that ResNet algorithm driven hyperspectral image analysis is feasible for monitoring both the physical and chemical properties of Guanxinning tablets at the same time.


Assuntos
Imageamento Hiperespectral , Tamanho da Partícula , Comprimidos/química
11.
Anal Methods ; 15(21): 2665-2676, 2023 06 01.
Artigo em Inglês | MEDLINE | ID: mdl-37212251

RESUMO

Traditional Chinese medicine (TCM) fingerprinting, which has the characteristics of holism and ambiguity, is a conventional strategy for the holistic quality control of TCMs. However, the fingerprinting of TCMs at the current stage generally adopts a single wavelength or few wavelengths, lacking the effective utilization of diode-array detector (DAD) chromatogram data. This study proposes an intelligent extraction approach of feature information from a three-dimensional DAD chromatogram to establish a novel bar-form-diagram (BFD) for integrated quality control of TCMs. The BFD was automatically established by the chromatographic and spectral information of a complex hybrid system in a DAD chromatogram. This covered the peak areas of target compositions at the optimal absorption wavelength. Taking 27 batches of Gardenia jasminoides root as samples, the BFD combined with chemometrics was applied for assessing the quality of samples completely, which improved the accuracy of origin classification using hierarchical cluster analysis, principal component analysis, soft independent modeling of class analogy and orthogonal partial least squares discriminant analysis. Single-wavelength fingerprinting and BFD used 23 and 38 common peaks as variables respectively, and the adjusted rand index results of the single wavelength and BFD were 0.559 and 0.819, respectively. Compared with the ergodic methods of each single wavelength, the peak recognition method in this study improved the operation speed from 180 s to 4 s and the computational complexity. The established BFD approach performed more abundant characteristic information of chemical components of TCMs and more accurate origin classification ability, and it had great advantages in the overall quality control of TCMs.


Assuntos
Gardenia , Medicina Tradicional Chinesa , Gardenia/química , Controle de Qualidade , Cromatografia/métodos , Análise de Componente Principal
12.
Spectrochim Acta A Mol Biomol Spectrosc ; 297: 122742, 2023 Sep 05.
Artigo em Inglês | MEDLINE | ID: mdl-37098315

RESUMO

Red ginseng is a widely used and extensively researched food and medicinal product with high nutritional value, derived from steamed fresh ginseng. The components in various parts of red ginseng differ significantly, resulting in distinct pharmacological activities and efficacies. This study proposed to establish a hyperspectral imaging technology combined with intelligent algorithms for the recognition of different parts of red ginseng based on the dual-scale of spectrum and image information. Firstly, the spectral information was processed by the best combination of first derivative as pre-processing method and partial least squares discriminant analysis (PLS-DA) as classification model. The recognition accuracy of the rhizome and the main root of red ginseng is 96.79% and 95.94% respectively. Then, the image information was processed by the You Only Look Once version 5 small (YOLO v5s) model. The best parameter combination is epoch = 30, learning rate = 0.01, and activation function is leaky ReLU. In the red ginseng dataset, the highest accuracy, recall and mean Average Precision at IoU (Intersection over Union) threshold 0.5 (mAP@0.5) were 99.01%, 98.51% and 99.07% respectively. The application of spectrum-image dual-scale digital information combined with intelligent algorithms in the recognition of red ginseng is successful, which provides a positive significance for the online and on-site quality control and authenticity identification of crude drugs or fruits.


Assuntos
Panax , Rizoma , Algoritmos , Análise Discriminante , Frutas
13.
Zhongguo Zhong Yao Za Zhi ; 37(1): 85-8, 2012 Jan.
Artigo em Zh | MEDLINE | ID: mdl-22741468

RESUMO

OBJECTIVE: To provide a scientific basis for the drug-combination and aim to examine whether astragaloside IV has the impact on the cytochrome P450 enzymes. METHOD: Tolbutamide, chlorzoxazone, coumarin, nifedipine, and phenacetin were as probe substrates of rat CYP2C9, CYP2E1, CYP2A6, CYP3A4, and CYP1A2, and were incubated in rat liver microsomes with astragaloside IV. Triplicate samples were run to generate IC50 value by incubating P450 probe substrates in the presence of five concentrations of astragaloside IV in the incubation mixture. The K(i) values were determined by fitting the probe substrate at various inhibitor concentrations to the equations for competitive inhibition, noncompetitive inhibition, noncompetitive inhibition, and mixed-type inhibition. RESULT: IC50 and K(i) values were estimated, and the types of inhibition were determined. Among the five probe substrates, astragaloside IV might not significantly affect CYP2E1, CYP2A6 and CYP1A2-mediated metabolism in rats, but was a competitive inhibitor of CYP2C9 (IC50 35.40 micromol x L(-1), K(i) 42.88 micromol x L(-1)), and was a uncompetitive inhibitor of CYP3A4 (IC50 88.24 micromol x L(-1), K(i) 33.31 micromol x L(-1)). CONCLUSION: These results suggested that astragaloside IV inhibited CYP2C9 and CYP3A4, which provided useful information for safe and effective use of astragaloside IV.


Assuntos
Inibidores das Enzimas do Citocromo P-450 , Medicamentos de Ervas Chinesas/farmacologia , Inibidores Enzimáticos/farmacologia , Microssomos Hepáticos/enzimologia , Saponinas/farmacologia , Triterpenos/farmacologia , Animais , Sistema Enzimático do Citocromo P-450/química , Sistema Enzimático do Citocromo P-450/metabolismo , Medicamentos de Ervas Chinesas/química , Inibidores Enzimáticos/química , Cinética , Masculino , Microssomos Hepáticos/química , Microssomos Hepáticos/efeitos dos fármacos , Ratos , Ratos Sprague-Dawley
14.
Artigo em Inglês | MEDLINE | ID: mdl-34281077

RESUMO

An effective approach for assessing a drug's potential to induce autoimmune diseases (ADs) is needed in drug development. Here, we aim to develop a workflow to examine the association between structural alerts and drugs-induced ADs to improve toxicological prescreening tools. Considering reactive metabolite (RM) formation as a well-documented mechanism for drug-induced ADs, we investigated whether the presence of certain RM-related structural alerts was predictive for the risk of drug-induced AD. We constructed a database containing 171 RM-related structural alerts, generated a dataset of 407 AD- and non-AD-associated drugs, and performed statistical analysis. The nitrogen-containing benzene substituent alerts were found to be significantly associated with the risk of drug-induced ADs (odds ratio = 2.95, p = 0.0036). Furthermore, we developed a machine-learning-based predictive model by using daily dose and nitrogen-containing benzene substituent alerts as the top inputs and achieved the predictive performance of area under curve (AUC) of 70%. Additionally, we confirmed the reactivity of the nitrogen-containing benzene substituent aniline and related metabolites using quantum chemistry analysis and explored the underlying mechanisms. These identified structural alerts could be helpful in identifying drug candidates that carry a potential risk of drug-induced ADs to improve their safety profiles.


Assuntos
Doenças Autoimunes , Preparações Farmacêuticas , Área Sob a Curva , Doenças Autoimunes/induzido quimicamente , Humanos , Aprendizado de Máquina
15.
Comput Math Methods Med ; 2020: 1391583, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-33029193

RESUMO

PURPOSE: We aimed to analyze and evaluate the safety signals of ribavirin-interferon combination through data mining of the US Food and Drug Administration Adverse Event Reporting System (FAERS), so as to provide reference for the rationale use of these agents in the management of relevant toxicities emerging in patients with novel coronavirus pneumonia (COVID-19). METHODS: Reports to the FAERS from 1 January 2004 to 8 March 2020 were analyzed. The proportion of report ratio (PRR), reporting odds ratio (ROR), and Bayesian confidence interval progressive neural network (BCPNN) method were used to detect the safety signals. RESULTS: A total of 55 safety signals were detected from the top 250 adverse event reactions in 2200 reports, but 19 signals were not included in the drug labels. All the detected adverse event reactions were associated with 13 System Organ Classes (SOC), such as gastrointestinal, blood and lymph, hepatobiliary, endocrine, and various nervous systems. The most frequent adverse events were analyzed, and the results showed that females were more likely to suffer from anemia, vomiting, neutropenia, diarrhea, and insomnia. CONCLUSION: The ADE (adverse drug event) signal detection based on FAERS is helpful to clarify the potential adverse events related to ribavirin-interferon combination for novel coronavirus therapy; clinicians should pay attention to the adverse reactions of gastrointestinal and blood systems, closely monitor the fluctuations of the platelet count, and carry out necessary mental health interventions to avoid serious adverse events.


Assuntos
Infecções por Coronavirus/tratamento farmacológico , Interferons/efeitos adversos , Pneumonia Viral/tratamento farmacológico , Ribavirina/efeitos adversos , Adolescente , Adulto , Sistemas de Notificação de Reações Adversas a Medicamentos , Idoso , Algoritmos , Teorema de Bayes , COVID-19 , Mineração de Dados , Esquema de Medicação , Quimioterapia Combinada/efeitos adversos , Feminino , Humanos , Interferons/administração & dosagem , Masculino , Pessoa de Meia-Idade , Redes Neurais de Computação , Razão de Chances , Pandemias , Segurança do Paciente , Ribavirina/administração & dosagem , Adulto Jovem , Tratamento Farmacológico da COVID-19
16.
Sci Rep ; 10(1): 8188, 2020 05 18.
Artigo em Inglês | MEDLINE | ID: mdl-32424219

RESUMO

Several studies provide insight into the landscape of breast cancer genomics with the genomic characterization of tumors offering exceptional opportunities in defining therapies tailored to the patient's specific need. However, translating genomic data into personalized treatment regimens has been hampered partly due to uncertainties in deviating from guideline based clinical protocols. Here we report a genomic approach to predict favorable outcome to treatment responses thus enabling personalized medicine in the selection of specific treatment regimens. The genomic data were divided into a training set of N = 835 cases and a validation set consisting of 1315 hormone sensitive, 634 triple negative breast cancer (TNBC) and 1365 breast cancer patients with information on neoadjuvant chemotherapy responses. Patients were selected by the following criteria: estrogen receptor (ER) status, lymph node invasion, recurrence free survival. The k-means classification algorithm delineated clusters with low- and high- expression of genes related to recurrence of disease; a multivariate Cox's proportional hazard model defined recurrence risk for disease. Classifier genes were validated by Immunohistochemistry (IHC) using tissue microarray sections containing both normal and cancerous tissues and by evaluating findings deposited in the human protein atlas repository. Based on the leave-on-out cross validation procedure of 4 independent data sets we identified 51-genes associated with disease relapse and selected 10, i.e. TOP2A, AURKA, CKS2, CCNB2, CDK1 SLC19A1, E2F8, E2F1, PRC1, KIF11 for in depth validation. Expression of the mechanistically linked disease regulated genes significantly correlated with recurrence free survival among ER-positive and triple negative breast cancer patients and was independent of age, tumor size, histological grade and node status. Importantly, the classifier genes predicted pathological complete responses to neoadjuvant chemotherapy (P < 0.001) with high expression of these genes being associated with an improved therapeutic response toward two different anthracycline-taxane regimens; thus, highlighting the prospective for precision medicine. Our study demonstrates the potential of classifier genes to predict risk for disease relapse and treatment response to chemotherapies. The classifier genes enable rational selection of patients who benefit best from a given chemotherapy thus providing the best possible care. The findings encourage independent clinical validation.


Assuntos
Neoplasias da Mama/tratamento farmacológico , Neoplasias da Mama/genética , Genômica , Terapia Neoadjuvante , Receptores de Estrogênio/metabolismo , Neoplasias da Mama/metabolismo , Feminino , Humanos , Pessoa de Meia-Idade , Recidiva , Resultado do Tratamento
17.
J Ginseng Res ; 42(3): 334-342, 2018 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-29983615

RESUMO

BACKGROUND: Panax notoginseng is a highly valued medicine and functional food, whose quality is considered to be influenced by the size, botanical parts, and growth environments. METHODS: In this study, a HPLC method integrating fingerprinting and determination of multiconstituents by single reference standard was established and adopted to investigate the chemical profiles and active constituent contents of 215 notoginseng samples with different sizes, from different botanical parts and geographical regions. RESULTS: Chemical differences among main root, branch root, and rotten root were not distinct, while rhizome and fibrous root could be discriminated from other parts. The notoginseng samples from Wenshan Autonomous Prefecture and cities nearby were similar, whereas samples from cities far away were not. The contents of major active constituents in main root did not correlate with the market price. CONCLUSION: This study provided comprehensive chemical evidence for the rational usage of different parts, sizes, and growth regions of notoginseng in practice.

18.
Phytomedicine ; 44: 129-137, 2018 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-29452723

RESUMO

BACKGROUND: To ensure pharmaceutical quality, chemistry, manufacturing and control (CMC) research is essential. However, due to the inherent complexity of Chinese medicine (CM), CMC study of CM remains a great challenge for academia, industry, and regulatory agencies. Recently, quality-marker (Q-marker) was proposed to establish quality standards or quality analysis approaches of Chinese medicine, which sheds a light on Chinese medicine's CMC study. PURPOSE: Here manufacture processes of Panax Notoginseng Saponins (PNS) is taken as a case study and the present work is to establish a Q-marker based research strategy for CMC of Chinese medicine. STUDY DESIGN: The Q-markers of Panax Notoginseng Saponins (PNS) is selected and established by integrating chemical profile with pharmacological activities. Then, the key processes of PNS manufacturing are identified by material flow analysis. Furthermore, modeling algorithms are employed to explore the relationship between Q-markers and critical process parameters (CPPs) of the key processes. At last, CPPs of the key processes are optimized in order to improving the process efficiency. RESULTS: Among the 97 identified compounds, Notoginsenoside R1, ginsenoside Rg1, Re, Rb1 and Rd are selected as the Q-markers of PNS. Our analysis on PNS manufacturing show the extraction process and column chromatography process are the key processes. With the CPPs of each process as the inputs and Q-markers' contents as the outputs, two process prediction models are built separately for the extraction process and column chromatography process of Panax notoginseng, which both possess good prediction ability. Based on the efficiency models of extraction process and column chromatography process we constructed, the optimal CPPs of both processes are calculated. CONCLUSION: Our results show that the Q-markers derived from CMC research strategy can be applied to analyze the manufacturing processes of Chinese medicine to assure product's quality and promote key processes' efficiency simultaneously.


Assuntos
Medicamentos de Ervas Chinesas/química , Panax notoginseng/química , Saponinas/química , Saponinas/farmacologia , Biomarcadores/análise , Medicamentos de Ervas Chinesas/farmacologia , Ginsenosídeos/análise , Medicina Tradicional do Leste Asiático , Controle de Qualidade , Saponinas/isolamento & purificação
19.
PLoS One ; 9(1): e87462, 2014.
Artigo em Inglês | MEDLINE | ID: mdl-24498109

RESUMO

The overall control of the quality of botanical drugs starts from the botanical raw material, continues through preparation of the botanical drug substance and culminates with the botanical drug product. Chromatographic and spectroscopic fingerprinting has been widely used as a tool for the quality control of herbal/botanical medicines. However, discussions are still on-going on whether a single technique provides adequate information to control the quality of botanical drugs. In this study, high performance liquid chromatography (HPLC), ultra performance liquid chromatography (UPLC), capillary electrophoresis (CE) and near infrared spectroscopy (NIR) were used to generate fingerprints of different plant parts of Panax notoginseng. The power of these chromatographic and spectroscopic techniques to evaluate the identity of botanical raw materials were further compared and investigated in light of the capability to distinguishing different parts of Panax notoginseng. Principal component analysis (PCA) and clustering results showed that samples were classified better when UPLC- and HPLC-based fingerprints were employed, which suggested that UPLC- and HPLC-based fingerprinting are superior to CE- and NIR-based fingerprinting. The UPLC- and HPLC- based fingerprinting with PCA were able to correctly distinguish between samples sourced from rhizomes and main root. Using chemometrics and its ability to distinguish between different plant parts could be a powerful tool to help assure the identity and quality of the botanical raw materials and to support the safety and efficacy of the botanical drug products.


Assuntos
Panax notoginseng/anatomia & histologia , Cromatografia Líquida de Alta Pressão/métodos , Eletroforese Capilar/métodos , Fitoterapia/métodos , Espectrofotometria Infravermelho/métodos
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