Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 13 de 13
Filtrar
Mais filtros

Base de dados
País/Região como assunto
Tipo de documento
Intervalo de ano de publicação
1.
JAMA Intern Med ; 183(7): 647-655, 2023 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-37126332

RESUMO

Importance: Previous research has suggested that Xuebijing injection (XBJ), an herbal-based intravenous preparation, may reduce mortality among patients with sepsis. Objective: To determine the effect of XBJ vs placebo on 28-day mortality among patients with sepsis. Design, Setting, and Participants: The Efficacy of Xuebijing Injection in Patients With Sepsis (EXIT-SEP) trial was a multicenter, randomized double-blind, placebo-controlled trial conducted in intensive care units at 45 sites and included 1817 randomized patients with sepsis (sepsis 3.0) present for less than 48 hours. Patients aged 18 to 75 years with a Sequential Organ Failure Assessment score of 2 to 13 were enrolled. The study was conducted from October 2017 to June 2019. The final date of follow-up was July 26, 2019. Data analysis was performed from January 2020 to August 2022. Interventions: The patients were randomized to receive either intravenous infusion of XBJ (100 mL, n = 911) or volume-matched saline placebo (n = 906) every 12 hours for 5 days. Main Outcomes and Measures: The primary outcome was 28-day mortality. Results: Among the 1817 patients who were randomized (mean [SD] age, 56.5 [13.5] years; 1199 [66.0%] men), 1760 (96.9%) completed the trial. In these patients, the 28-day mortality rate was significantly different between the placebo group and the XBJ group (230 of 882 patients [26.1%] vs 165 of 878 patients [18.8%], respectively; P < .001). The absolute risk difference was 7.3 (95% CI, 3.4-11.2) percentage points. The incidence of adverse events was 222 of 878 patients (25.3%) in the placebo group and 200 of 872 patients (22.9%) in the XBJ group. Conclusions and Relevance: In this randomized clinical trial among patients with sepsis, the administration of XBJ reduced 28-day mortality compared with placebo. Trial Registration: ClinicalTrials.gov Identifier: NCT03238742.


Assuntos
Medicamentos de Ervas Chinesas , Sepse , Masculino , Humanos , Pessoa de Meia-Idade , Feminino , Método Duplo-Cego , Sepse/tratamento farmacológico , Sepse/mortalidade , Medicamentos de Ervas Chinesas/uso terapêutico , Escores de Disfunção Orgânica
2.
Zhongguo Zhong Yao Za Zhi ; 48(2): 356-365, 2023 Jan.
Artigo em Chinês | MEDLINE | ID: mdl-36725225

RESUMO

This research established a high-performance liquid chromatography(HPLC) method for simultaneous determination of isoorientin, orientin, vitexin, and isovitexin in Commelina communis to conduct content difference analysis and quality evaluation of 62 batches of C. communis from different origins. The HPLC content determination was performed on a Dikma Platisil ODS chromatographic column(4.6 mm×250 mm, 5 µm), with acetonitrile-0.1% formic acid(14∶86) as the mobile phase. The detection wavelength was set at 348 nm, the flow rate was 1.0 mL·min~(-1), and the column temperature was 35 ℃. The differences in origins and quality of 62 batches of C. communis were studied by chemometrics. The results showed that the determination of four components mani-fested a good linear relationship in the range of mass concentration(r>0.999 9), and the average recovery rate was 96.17%-103.0%. The relative standard deviations(RSDs) of precision, stability, and repeatability were all less than 2.0%. The content of four components from high to low was isoorientin>isovitexin>orientin>vitexin. Forty-seven batches of C. communis with clear origins were classified into six categories by chemometrics. C. communis from different origins had different qualities. Generally, C. communis from Western China, Central China, and South of China had superior qualities. The HPLC method established in this study is specific, simple, and efficient, which provides references for the comprehensive evaluation of the quality of C. communis. The chemometrics shows that the qualities of C. communis from different origins are largely different. Isoorientin can be used as an index to determine the content of C. communis, and its content limit should be set no less than 0.023%.


Assuntos
Commelina , Medicamentos de Ervas Chinesas , Quimiometria , Medicamentos de Ervas Chinesas/química , China , Cromatografia Líquida de Alta Pressão/métodos
3.
Int Urol Nephrol ; 49(11): 1955-1963, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28889323

RESUMO

OBJECTIVE: Prognostic nutritional index (PNI) is a recognized indicator of both immune and nutritional status. It was firstly used as a preoperative prognostic indicator, and its role in the prognosis of patients with metastatic renal cell carcinoma (mRCC) has not yet been investigated in large-scale study. The purpose of this work was to investigate the prognostic role of pretreatment PNI in patients with mRCC with sorafenib or sunitinib as first-line targeted therapy. METHOD: In this retrospective single-center research, the Kaplan-Meier method was used to estimate the progression-free survival (PFS) and overall survival (OS) of 178 mRCC patients who received first-line therapy of sorafenib or sunitinib. Log-rank test was used to compare the survival outcomes of patients with low pretreatment PNI (PNI < 51.62) and high pretreatment PNI (PNI ≥ 51.62), and Cox proportional hazard regression model was used to compare PFS and OS between these two groups. Prognostic accuracy was determined using Harrell concordance index. RESULTS: The overall median PFS and OS time for all 178 patients were 11 months (95% CI 9-12 months) and 24 months (95% CI 19-33 months), respectively. Patients with low pretreatment PNI both had significantly shorter median PFS (7 vs 19 months, P < 0.001) and OS (14 vs 50 months, P < 0.001) than those with high PNI. Multivariate analysis showed that pretreatment PNI was an independent predictor of OS (HR 1.658, 95% CI 1.040-2.614, P = 0.033) and an independent predictor of PFS as well (HR 1.842, 95% CI 1.226-2.766, P = 0.003). The model built by the addition of pretreatment PNI improved predictive accuracy of PFS and OS compared with the International Metastatic Renal Cell Carcinoma Database Consortium Model (Heng model) (c-index: 0.68 and 0.70). Comparing to NLR (neutrophil-to-lymphocyte ratio) (0.69 and 0.72), PNI might be a preciser factor to predict PFS and OS (0.71 and 0.73). CONCLUSIONS: Low pretreatment PNI could be a significant risk factor for mRCC patients who received tyrosine kinase inhibitors as first-line target therapy and increase the accuracy of established prognostic model.


Assuntos
Carcinoma de Células Renais/terapia , Indóis/uso terapêutico , Neoplasias Renais/terapia , Niacinamida/análogos & derivados , Estado Nutricional , Compostos de Fenilureia/uso terapêutico , Inibidores de Proteínas Quinases/uso terapêutico , Pirróis/uso terapêutico , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Renais/secundário , Quimioterapia Adjuvante , Intervalo Livre de Doença , Feminino , Humanos , Estimativa de Kaplan-Meier , Neoplasias Renais/patologia , Contagem de Linfócitos , Masculino , Pessoa de Meia-Idade , Terapia Neoadjuvante , Nefrectomia , Neutrófilos , Niacinamida/uso terapêutico , Período Pré-Operatório , Prognóstico , Modelos de Riscos Proporcionais , Estudos Retrospectivos , Sorafenibe , Sunitinibe , Taxa de Sobrevida , Adulto Jovem
4.
Chin J Cancer ; 36(1): 64, 2017 Aug 08.
Artigo em Inglês | MEDLINE | ID: mdl-28789709

RESUMO

BACKGROUND: Sorafenib and sunitinib are widely used as first-line targeted therapy for metastatic renal cell carcinoma (mRCC) in China. This study aimed to compare the efficacy, safety, and quality of life (QoL) in Chinese mRCC patients treated with sorafenib and sunitinib as first-line therapy. METHODS: Clinical data of patients with mRCC who received sorafenib (400 mg twice daily; 4 weeks) or sunitinib (50 mg twice daily; on a schedule of 4 weeks on treatment followed by 2 weeks off) were retrieved. Primary outcomes were overall survival (OS), progression-free survival (PFS), adverse events (AEs), and QoL (SF-36 scores), and secondary outcomes were associations of clinical characteristics with QoL. RESULTS: Medical records of 184 patients (110 in the sorafenib group and 74 in the sunitinib group) were reviewed. PFS and OS were comparable between the sorafenib and sunitinib groups (both P > 0.05). The occurrence rates of leukocytopenia, thrombocytopenia, and hypothyroidism were higher in the sunitinib group (36.5% vs. 10.9%, P < 0.001; 40.5% vs. 10.9%, P < 0.001; 17.6% vs. 3.6%, P = 0.001), and that of diarrhea was higher in the sorafenib group (62.7% vs. 35.2%, P < 0.001). There was no significant difference in SF-36 scores between the two groups. Multivariate analysis indicated that role-physical and bodily pain scores were associated with the occurrence rate of grade 3 or 4 AEs (P = 0.017 and 0.005). CONCLUSIONS: Sorafenib has comparable efficacy and lower toxicity profile than sunitinib as first-line therapy for mRCC. Both agents showed no significant impact on QoL of patients.


Assuntos
Carcinoma de Células Renais/tratamento farmacológico , Indóis/administração & dosagem , Niacinamida/análogos & derivados , Compostos de Fenilureia/administração & dosagem , Inibidores de Proteínas Quinases/administração & dosagem , Pirróis/administração & dosagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Renais/epidemiologia , Carcinoma de Células Renais/patologia , China , Intervalo Livre de Doença , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/classificação , Efeitos Colaterais e Reações Adversas Relacionados a Medicamentos/patologia , Feminino , Humanos , Indóis/efeitos adversos , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Niacinamida/administração & dosagem , Niacinamida/efeitos adversos , Compostos de Fenilureia/efeitos adversos , Inibidores de Proteínas Quinases/efeitos adversos , Pirróis/efeitos adversos , Qualidade de Vida , Sorafenibe , Sunitinibe , Resultado do Tratamento
5.
Prostate ; 77(12): 1233-1241, 2017 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-28752926

RESUMO

OBJECTIVE: To determine if prognostic nutritional index (PNI) and its variation could predict initial response to treatment and prognosis in metastatic castration-resistant prostate cancer (mCRPC) patients treated with Abiraterone (AA). PATIENTS AND METHODS: One-hundred-twelve chemotherapy pretreated or chemotherapy-naive patients were scheduled for systemic treatment with AA. PNI levels were measured before and after one month of AA treatment. Univariate and multivariate logistic regression analyses were used to identify predictive factors of initial response to AA treatment. Univariable and Multivariable Cox regression analyses were performed to determine prognostic factors that were associated with PSA progression-free survival (PSA-PFS), radiographic PFS (rPFS) and overall survival (OS). The Harrell concordance index with variables only or combined PNI data were used to evaluate the prognostic accuracy. RESULTS: Eighty-one (72.3%) of 112 patients showed initial response to AA treatment, in which 15 experienced PSA flare during AA treatment. In multivariate logistic regression analyses, high baseline PNI level, PSA level decrease during the first month of AA treatment and PNI level elevation during the first month of AA treatment were significantly correlated with initial response to AA treatment. In multivariate Cox regression analysis, low PNI level remained significant predictors of OS, rPFS and PSA-PFS. The estimated c-index of the multivariate model for OS increased from 0.82 without PNI to 0.83 when PNI added. CONCLUSION: Independent of PSA level variation, PNI level elevation during the first month of AA treatment and high baseline PNI level were significantly correlated with initial response to AA treatment. In addition, low pretreatment PNI level is a negative independent prognosticator of survival outcomes in mCRPC treated with AA and also increases the accuracy of established prognostic model.


Assuntos
Androstenos/uso terapêutico , Antineoplásicos/uso terapêutico , Avaliação Nutricional , Neoplasias de Próstata Resistentes à Castração/diagnóstico , Neoplasias de Próstata Resistentes à Castração/tratamento farmacológico , Idoso , Estudos de Coortes , Seguimentos , Humanos , Masculino , Prognóstico , Estudos Retrospectivos , Resultado do Tratamento
6.
Chin J Cancer ; 36(1): 47, 2017 May 18.
Artigo em Inglês | MEDLINE | ID: mdl-28521783

RESUMO

BACKGROUND: Hypoalbuminemia adversely affects the clinical outcomes of various cancers. The purpose of this study was to estimate the prognostic value of hypoalbuminemia 3-5 weeks after treatment in patients with metastatic renal cell carcinoma (mRCC) who received sorafenib or sunitinib as first-line treatment. METHODS: In this single-center, retrospective study, we assessed the progression-free survival (PFS) and overall survival (OS) of 184 mRCC patients who received first-line sorafenib or sunitinib treatment. PFS and OS were compared between patients with post-treatment hypoalbuminemia (post-treatment albumin level <36.4 g/L) and those with normal post-treatment albumin level (albumin level ≥36.4 g/L). The Memorial Sloan Kettering Cancer Center (MSKCC) risk model stratified mRCC patients into three risk categories. Prognostic values of all patient characteristics including MSKCC risk category were determined by using univariate and multivariate Cox regression models. Prognostic value was further determined using the Harrell concordance index and receiver operating characteristic curve analysis. RESULTS: The median PFS and OS of the 184 patients were 11 months (95% confidence interval [CI] 9-12 months) and 23 months (95% CI 19-33 months), respectively. Patients with post-treatment hypoalbuminemia had significantly shorter median PFS (6 months [95% CI 5-7 months]) and OS (11 months [95% CI 9-15 months]) than patients who had normal post-treatment albumin levels (PFS: 12 months [95% CI 11-16 months], P < 0.001; OS: 31 months [95% CI 24-42 months], P < 0.001), respectively. Multivariate analysis showed that post-treatment hypoalbuminemia was an independent predictor of PFS (hazard ratio [HR], 2.113; 95% CI 1.390-3.212; P < 0.001) and OS (HR, 2.388; 95% CI 1.591-3.585; P < 0.001). Post-treatment hypoalbuminemia could also be combined with the MSKCC risk category for better prediction about OS. The model that included post-treatment hypoalbuminemia and MSKCC risk category improved the predictive accuracy for PFS and OS (c-index: 0.68 and 0.73, respectively) compared with the basic MSKCC risk model (c-index: 0.67 and 0.70, respectively). The prognostic values for PFS and OS of the integrated MSKCC risk model involving post-treatment hypoalbuminemia were significantly more accurate than the basic MSKCC risk model using likelihood ratio analysis (both P < 0.001). CONCLUSIONS: Post-treatment hypoalbuminemia can be considered an independent prognostic factor for patients with mRCC who undergo first-line treatment with tyrosine kinase inhibitors. Additionally, integrating post-treatment serum albumin level into the basic MSKCC risk model can improve the accuracy of this model in predicting patient overall survival and progression-free survival.


Assuntos
Carcinoma de Células Renais/tratamento farmacológico , Hipoalbuminemia/patologia , Niacinamida/análogos & derivados , Compostos de Fenilureia/administração & dosagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma de Células Renais/patologia , Intervalo Livre de Doença , Feminino , Humanos , Hipoalbuminemia/induzido quimicamente , Indóis/administração & dosagem , Indóis/efeitos adversos , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Niacinamida/administração & dosagem , Niacinamida/efeitos adversos , Compostos de Fenilureia/efeitos adversos , Prognóstico , Modelos de Riscos Proporcionais , Inibidores de Proteínas Quinases/administração & dosagem , Inibidores de Proteínas Quinases/efeitos adversos , Pirróis/administração & dosagem , Pirróis/efeitos adversos , Sorafenibe , Sunitinibe , Resultado do Tratamento
7.
Food Chem ; 235: 227-233, 2017 Nov 15.
Artigo em Inglês | MEDLINE | ID: mdl-28554631

RESUMO

YingDe black tea is produced from crude tea prepared from leaves of Camellia sinensis var. assamica. In this work, we isolated and identified five novel flavanones, namely, amelliaone A-E (1-5), along with seven known compounds 6-12 from the ethanol extract of YingDe black tea. The structures of these five novel phenolic compounds were determined using extensive 1D and 2D nuclear magnetic resonance spectroscopy experiments. The compounds were further evaluated for antioxidant, α-glucosidase inhibitory, and cytotoxic activities. Compound 1 exhibited higher α-glucosidase inhibitory activity with a half-maximum inhibitory concentration value (IC50) of 10.2µM compared with acarbose (18.2µM).


Assuntos
Camellia sinensis/química , Flavanonas/análise , Inibidores de Glicosídeo Hidrolases/análise , Antioxidantes , Chá/química , alfa-Glucosidases/análise
8.
Clin Genitourin Cancer ; 15(3): e437-e446, 2017 06.
Artigo em Inglês | MEDLINE | ID: mdl-28188047

RESUMO

BACKGROUND: Although serum prealbumin is a sensitive marker to assess malnutrition, its prognostic impact in patients with metastatic renal cell carcinoma (mRCC) remains elusive. METHODS: Patients' data were retrospectively retrieved from the medical records of Renji Hospital affiliated to Shanghai Jiao Tong University School of Medicine from March 2006 to July 2015 to access overall survival (OS) and progression-free survival (PFS). The survival outcomes of patients with low pretreatment prealbumin (< 200 mg/L) and high pretreatment prealbumin (≥ 200 mg/L) were compared using a log-rank test and Cox proportional hazard regression model. Prognostic accuracy was determined using the Harrell concordance index (c-index). RESULTS: The median PFS and OS for 143 patients were 11 months (95% confidence interval [CI], 9-14 months) and 27 months (95% CI, 22-39 months), respectively. The low pretreatment prealbumin group had significantly shorter median PFS (6 vs. 14 months, P < .001) and OS (10 vs. 34 months, P < .001) than the normal pretreatment prealbumin group. Multivariate analysis showed that pretreatment prealbumin was an independent predictor of OS (hazard ratio [HR] 1.963; 95% CI, 1.140-3.381; P = .015) and also an independent predictor of PFS (HR 2.021; 95% CI, 1.227-3.329; P = .006). Further, addition of pretreatment prealbumin to the Heng model enhanced the predictive accuracy of PFS and OS (c-index: 0.70 and 0.74) compared with the Heng model alone (c-index: 0.69 and 0.72). CONCLUSION: Low pretreatment serum prealbumin is an independent prognosticator of risk and survival outcomes in patients with mRCC receiving tyrosine kinase inhibitors as first-line treatment and also increases the accuracy of established prognostic models.


Assuntos
Antineoplásicos/administração & dosagem , Carcinoma de Células Renais/tratamento farmacológico , Neoplasias Renais/tratamento farmacológico , Pré-Albumina/metabolismo , Inibidores de Proteínas Quinases/administração & dosagem , Adulto , Idoso , Idoso de 80 Anos ou mais , Antineoplásicos/uso terapêutico , Carcinoma de Células Renais/sangue , Intervalo Livre de Doença , Feminino , Humanos , Indóis/administração & dosagem , Indóis/uso terapêutico , Neoplasias Renais/sangue , Masculino , Pessoa de Meia-Idade , Metástase Neoplásica , Niacinamida/administração & dosagem , Niacinamida/análogos & derivados , Niacinamida/uso terapêutico , Compostos de Fenilureia/administração & dosagem , Compostos de Fenilureia/uso terapêutico , Prognóstico , Modelos de Riscos Proporcionais , Inibidores de Proteínas Quinases/uso terapêutico , Pirróis/administração & dosagem , Pirróis/uso terapêutico , Estudos Retrospectivos , Albumina Sérica Humana/metabolismo , Sorafenibe , Sunitinibe , Resultado do Tratamento
9.
Acta Pharmacol Sin ; 37(12): 1597-1605, 2016 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-27665846

RESUMO

AIM: Deacetylisovaltratum (DI) is isolated from the traditional Chinese herbal medicine Patrinia heterophylla Bunge, which exhibits anti-cancer activity. Here, we investigated the effects of DI on human gastric carcinoma cell lines in vitro and elucidated its anti-cancer mechanisms. METHODS: Human gastric carcinoma AGS and HGC-27 cell lines were treated with DI, and cell viability was detected with MTT assay. Cell cycle stages, apoptosis and mitochondrial membrane potential were measured using flow cytometry. Protein levels were analyzed by Western blotting. Tubulin polymerization assays and immunofluorescence were used to characterize the tubulin polymerization process. RESULTS: DI inhibited the cell viability of AGS and HGC-27 cells in a dose- and time-dependent manner with IC50 values of 12.0 and 28.8 µmol/L, respectively, at 24 h of treatment. Treatment with DI (10-100 µmol/L) dose-dependently promoted tubulin polymerization, and induced significant G2/M cell cycle arrest in AGS and HGC-27 cells. Moreover, DI treatment disrupted mitochondrial membrane potential and induced caspase-dependent apoptosis in AGS and HGC-27 cells. CONCLUSION: DI induces G2/M-phase arrest by disrupting tubulin polymerization in human gastric cancer cells, which highlights its potent anti-cancer activity and potential application in gastric cancer therapy.


Assuntos
Antineoplásicos/farmacologia , Pontos de Checagem da Fase G2 do Ciclo Celular/efeitos dos fármacos , Neoplasias Gástricas/tratamento farmacológico , Moduladores de Tubulina/farmacologia , Antineoplásicos/química , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Humanos , Potencial da Membrana Mitocondrial/efeitos dos fármacos , Potenciais da Membrana/efeitos dos fármacos , Tubulina (Proteína)/química , Moduladores de Tubulina/química
10.
J Chromatogr Sci ; 53(1): 177-82, 2015 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-24895446

RESUMO

A simple and rapid liquid chromatography-ion trap mass spectrometric (LC-IT/MS) method has been developed and validated for quantification of wilfordmine in human plasma. After the protein precipitation was carried out by acetonitrile and the solution was cleaned by solid-phase extraction, the chromatographic separation was performed on a Zorbax Plus RRHD C18 column by using a mixture of acetonitrile and 10.0 mmol/L ammonium acetate solution (70:30, v/v) as the mobile phase at a flow rate of 0.7 mL/min. Detection was performed on an atmospheric-pressure chemical ionization source in the positive multiple reaction monitoring mode using aconitine as an internal standard (IS) with transitions of m/z 806→710 for wilfordmine, and 646→586 for IS, respectively. The obtained calibration curve was linear (r = 0.9992) over the concentration range of 0.5-100.0 µg/L with a lower limit of quantification of 0.5 µg/L in plasma. The intra- and interday relative standard deviations were <7.0 and 12.3%, respectively. The recoveries were between 86.0 and 97.0%. The proposed method was found to be applicable to clinical studies.


Assuntos
Alcaloides/sangue , Cromatografia Líquida de Alta Pressão/métodos , Medicamentos de Ervas Chinesas/análise , Espectrometria de Massas/métodos , Humanos
11.
Epigenomics ; 1(1): 177-200, 2009 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-22122642

RESUMO

AIMS: Bisulfite sequence analysis of individual CpG sites within genomic DNA is a powerful approach for methylation analysis in the genome. The major limitation of bisulfite-based methods is parallelization. Both array and next-generation sequencing technology are capable of addressing this bottleneck. In this report, we describe the application of Infinium® genotyping technology to analyze bisulfite-converted DNA to simultaneously query the methylation state of over 27,000 CpG sites from promoters of consensus coding sequences (CCDS) genes. MATERIALS & METHODS: We adapted the Infinium genotyping assay to readout an array of over 27,000 pairs of CpG methylation-specific query probes complementary to bisulfite-converted DNA. Two probes were designed to each CpG site: a 'methylated' and an 'unmethylated' query probe. The probe design assumed that all underlying CpG sites were 'in phase' with the queried CpG site due to their close proximity. Bisulfite conversion was performed with a modified version of the Zymo EZ DNA Methylation™ kit. RESULTS: We applied this technology to measuring methylation levels across a panel of 14 different human tissues, four Coriell cell lines and six cancer cell lines. We observed that CpG sites within CpG islands (CGIs) were largely unmethylated across all tissues (~80% sites unmethylated, ß < 0.2), whereas CpG sites in non-CGIs were moderately to highly methylated (only ~12% sites unmethylated, ß < 0.2). Within CGIs, only approximately 3-6% of the loci were highly methylated; in contrast, outside of CGIs approximately 25-40% of loci were highly methylated. Moreover, tissue-specific methylation (variation in methylation across tissues) was much more prevalent in non-CGIs than within CGIs. CONCLUSION: Our results demonstrate a genome-wide scalable array-based methylation readout platform that is both highly reproducible and quantitative. In the near future, this platform should enable the analysis of hundreds of thousands to millions of CpG sites per sample.


Assuntos
Metilação de DNA , DNA/metabolismo , Epigenômica/métodos , Análise de Sequência com Séries de Oligonucleotídeos , Linhagem Celular Tumoral , Sequência Consenso , Ilhas de CpG , DNA/química , Genoma Humano , Células HeLa , Humanos , Células Jurkat , Células K562 , Regiões Promotoras Genéticas , Análise de Sequência de DNA , Sulfitos/química
12.
J Asian Nat Prod Res ; 4(3): 185-7, 2002 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-12118506

RESUMO

A new cinnamide derivative together with N (p-hydroxyphenylethyl) p-coumaramide and vanillic acid has been isolated from the stems of Solanum verbascifolium L., the structure of the new compound was elucidated as N-2-hydroxy-2 (p-hydroxyphenylethyl) p-coumaramide (1) on the basis of physical and chemical evidence and spectral analysis.


Assuntos
Cinamatos/química , Medicamentos de Ervas Chinesas/química , Fitoterapia , Solanum , Cinamatos/isolamento & purificação , Medicamentos de Ervas Chinesas/isolamento & purificação , Humanos , Espectroscopia de Ressonância Magnética , Caules de Planta
13.
Zhongguo Zhong Yao Za Zhi ; 27(1): 42-3, 2002 Jan.
Artigo em Chinês | MEDLINE | ID: mdl-12774355

RESUMO

OBJECTIVE: To study chemical constituents of Solanum lyratum. METHOD: The constituens were isolated by polystyrene resin RA, sephadex LH-20 and silica gel column chormatography, their structures were identified by spectroscopic analysis. RESULT: Four compounds were identified as The constituens were caffeic acid, vanillic acid, rutin and N(p-hydropheneethyl) p-coumaramide. CONCLUSION: These compounds were isolated from this plant for the first time.


Assuntos
Ácidos Cafeicos/isolamento & purificação , Plantas Medicinais/química , Rutina/isolamento & purificação , Solanum/química , Ácido Vanílico/isolamento & purificação , Ácidos Cafeicos/química , Rutina/química , Ácido Vanílico/química
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA