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Retrograde adeno-associated viruses (AAVs) are capable of infecting the axons of projection neurons and serve as a powerful tool for the anatomical and functional characterization of neural networks. However, few retrograde AAV capsids have been shown to offer access to cortical projection neurons across different species and enable the manipulation of neural function in non-human primates (NHPs). Here, we report the development of a novel retrograde AAV capsid, AAV-DJ8R, which efficiently labeled cortical projection neurons after local administration into the striatum of mice and macaques. In addition, intrastriatally injected AAV-DJ8R mediated opsin expression in the mouse motor cortex and induced robust behavioral alterations. Moreover, AAV-DJ8R markedly increased motor cortical neuron firing upon optogenetic light stimulation after viral delivery into the macaque putamen. These data demonstrate the usefulness of AAV-DJ8R as an efficient retrograde tracer for cortical projection neurons in rodents and NHPs and indicate its suitability for use in conducting functional interrogations.
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Animales , Haplorrinos , Axones , Neuronas Motoras , Interneuronas , Macaca , Dependovirus/genética , Vectores GenéticosRESUMEN
Integrating multisensory inputs to generate accurate perception and guide behavior is among the most critical functions of the brain. Subcortical regions such as the amygdala are involved in sensory processing including vision and audition, yet their roles in multisensory integration remain unclear. In this study, we systematically investigated the function of neurons in the amygdala and adjacent regions in integrating audiovisual sensory inputs using a semi-chronic multi-electrode array and multiple combinations of audiovisual stimuli. From a sample of 332 neurons, we showed the diverse response patterns to audiovisual stimuli and the neural characteristics of bimodal over unimodal modulation, which could be classified into four types with differentiated regional origins. Using the hierarchical clustering method, neurons were further clustered into five groups and associated with different integrating functions and sub-regions. Finally, regions distinguishing congruent and incongruent bimodal sensory inputs were identified. Overall, visual processing dominates audiovisual integration in the amygdala and adjacent regions. Our findings shed new light on the neural mechanisms of multisensory integration in the primate brain.
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Animales , Macaca , Estimulación Acústica , Percepción Auditiva/fisiología , Percepción Visual/fisiología , Amígdala del Cerebelo/fisiología , Estimulación LuminosaRESUMEN
A novel coordination polymer (CP) based on Zn(II) of [Zn(tptc)0.5(bpy)(H2O)]n (1) was synthesized through utilizing the 2,2'-bipyridine (bpy) chelating N donors and p-terphenyl-2,2'',5'',5'''-tetracarboxylate acid (H4tptc) as the co-ligands. The measurements of the fluorescence were implemented for the complex 1 in solution and solid state, and the result reveals that 1 has a strong fluorescence and it is a sensory material with great development space to determine the trace Cr2O72- (with the detection limit of 36 ppb) in the water solutions via applying the fluorescence quenching effect. As the common disease in the orthopedic nursing, the deep vein thrombosis was the objective in this research. The weigh and length of the thrombus in the animals were measured and analyzed. In addition to this, the inflammatory response in the deep vein thrombosis animal was evaluated by RT-PCR. Molecular docking results indicate that only the carboxyl group could provide polar oxygen atoms for the formed hydrogen bonds to the protein.
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Complejos de Coordinación/farmacología , Colorantes Fluorescentes/farmacología , Enfermería Ortopédica , Polímeros/farmacología , Trombosis de la Vena/prevención & control , Zinc/farmacología , Animales , Línea Celular , Complejos de Coordinación/síntesis química , Complejos de Coordinación/química , Colorantes Fluorescentes/síntesis química , Colorantes Fluorescentes/química , Inflamación/prevención & control , Simulación del Acoplamiento Molecular , Polímeros/química , Dicromato de Potasio/análisis , Ratas , Contaminantes Químicos del Agua/análisis , Zinc/químicaRESUMEN
BACKGROUND: Sleep abnormalities occur frequently in critically ill patients. Nurses are strategically placed, specifically in intensive care units, to promote sleep in such patients. Currently, an effective sleep assessment tool in Chinese is not available for intensive care settings. AIM: This study aimed to assess the reliability and validity of the Chinese version of the Richards-Campbell Sleep Questionnaire (RCSQ-C). It also aimed to evaluate patient-nurse reliability and agreement of the RCSQ-C in the intensive care unit (ICU). METHODS: We translated the original RCSQ into Chinese and then back-translated it into English to ensure its accuracy of translation. Internal consistency, discrimination validity and construct validity of the RCSQ-C were examined in 150 critically ill patients. The convergent validity of the RCSQ-C was evaluated in 44 of 150 critically ill patients, and data from the RCSQ-C were compared with those of the Chinese version of St Mary's Hospital Sleep Questionnaire (SMHSQ). Comparisons were also made between RCSQ-C scores obtained from patients and their nurses. RESULTS: Cronbach's α of the RCSQ-C was 0.923; thus, it showed high reliability. The corrected item-total correlation coefficient was in the range of 0·680â¼0·805, which showed that the items were homogeneous for evaluating sleep. The content validity was 0·84. One factor was extracted with a cumulative contribution rate of 76·597%. Confirmatory factor analysis showed that the original single-factor structure proposed by Richards adequately fit the data. The RCSQ-C could discriminate poor and good sleepers, which supported discriminant validity. There was a close correlation between the scores obtained from the RCSQ patient's version and those from the SMHSQ. The intraclass correlation coefficients of the patient and nurse ranged from 0·315 to 0·609. CONCLUSIONS: The psychometric properties of the RCSQ-C suggest its utility in critically ill patients. Patient-nurse reliability on the RCSQ-C was "fair" to "substantial", with nurses tending to overestimate patients' perceived sleep quality. RELEVANCE TO CLINICAL PRACTICE: If the validity of this questionnaire is supported in other ICU samples, RCSQ-C could be used as a routine evaluation instrument to distinguish good and poor sleepers and then direct nurses to form corresponding treatment plans to promote sleep.
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Enfermedad Crítica/enfermería , Evaluación en Enfermería , Psicometría , Sueño/fisiología , China , Femenino , Humanos , Unidades de Cuidados Intensivos , Masculino , Persona de Mediana Edad , Medición de Resultados Informados por el Paciente , Reproducibilidad de los Resultados , Encuestas y Cuestionarios , TraducciónRESUMEN
Comparative analysis of the variations in HA 1 gene of the influenza A (H3N2) virus and the vaccine recommended were conducted in Shangluo city of China,during the surveillance year of 2014-2015.In this study,we collected the samples of H3N2 subtype strain from the Shanglou City of China during the surveillance period of 2014-2015.The strain was cultured in MDCK cells,HA gene fragment was amplified by RT-PCR and the nucleotide sequence was determined.Sequence alignment was performed using the clustax2.1 software.The phylogenetic tree was constructed by Mega6.0 software and was analyzed by Neighboring-joining method.Results showed that the homology of isolated strain during 2014-2015 was 97.2 %-99.9% and homology with the recommended vaccine strain A/Texas/50/2012 was 97.3%-98.5%.The amino acid sequence of the HA 1 gene of the isolated strain was compared with that of the vaccine strain.The major antigenic determinants of the isolates in 2014,having mutations were section B,Y159F,S198P,while the major antigenic determinants of isolates in 2015,having amino acid mutations were A zone G142R,B region S159F,S198P.These results indicated that the key antigenic determinant of influenza H3N2 subtype strain in Shangluo City has changed in 2014-2015 and A/Texas/50/2012 vaccine component is no more effective.Hence,there is an urgent need to update the influenza H3N2 subtype vaccine components and in future we should be deeply concerned about the evolution ofinfluenza H3N2 gene trends.
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OBJECTIVE@#To explore the changes of microRNAs in nasal mucosa after the specific immunotherapy (SIT) for allergic rhinitis (AR) in mice.@*METHOD@#Female BALB/c mice, 6-8 weeks of age, were randomly divided into control group, model group and treatment group. AR model were established by intraperitoneal injection and intranasal challenge of ovalbumin and SIT was performed by inguinal subcutaneous injections. AR symptom scores were documented. The eosinophils (EOS) in the nasal mucosa were measured. Ovalbumin-specific IgE (OVA-sIgE) in the serum and expression of interferon-γ and interleukin-4 in the nasal lavage were measured by enzyme-linked immunosorbent assay meanwhile the ratio of interferon-γ and interleukin-4 was calculated. The microRNAs in the nasal mucosa were preliminary screened by microRNA gene microarray. Comparing with model group, the Fold changes of microRNA of the treatment group were ≥ 2.0 and the P < 0.05. MicroRNA target genes were predicted with GeneSpring 12.5 software. We took the intersection between genes in the signal pathway which associated with immune response,inflammation and target genes. The MEV-4-6-0 and Cytoscape_v2. 8. 2. software was applied to perform the cluster analysis and target gene regulatory networks maps.@*RESULT@#The model of AR in mice and its SIT were successful. Comparing with the model group, the Fold changes of 15 microRNAs, of which 9 microRNAs were up-regulated and 6 microRNAs were down-regulated, were ≥ 2.0 in treatment group (P < 0.05). Cluste analysis showed clearly that microRNAs in the treatment group and model group respectively aggregated in two branches. The 15 microRNAs had 5302 target genes, of which, 451 genes were related more with SIT by the intersection. One microRNA can regulate many target genes, and one gene can also be affected by many microRNAs. Their synergistic effects may be involved in the mechanism of SIT.@*CONCLUSION@#The expressions of microRNAs are changed in nasal mucosa after SIT for AR in mice and we can speculate that microRNAs are involved in the process of SIT for AR. Bioinformatics methods can diminish the scope of target genes of microRNAs, which will help us studying the effect of changed microRNA on its relative target genes after SIT, and make us better understanding the mechanism of the disease and its SIT.
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Animales , Femenino , Ratones , Administración Intranasal , Modelos Animales de Enfermedad , Ensayo de Inmunoadsorción Enzimática , Eosinófilos , Alergia e Inmunología , Inmunoglobulina E , Sangre , Inmunoterapia , Interferón gamma , Alergia e Inmunología , Interleucina-4 , Alergia e Inmunología , Ratones Endogámicos BALB C , MicroARNs , Metabolismo , Mucosa Nasal , Metabolismo , Ovalbúmina , Rinitis Alérgica , TerapéuticaRESUMEN
Objective:To explore the feasibility of inguinal subcutaneous immunotherapy for allergic rhinitis ( AR ) in mice. Methods:36 female BALB/c mice were divided randomly into six groups( n=6 per group) including the control A,the model A, the treatment A groups,and the control B,the model B,the treatment B groups(inguinal subcutaneous immunotherapy for group A, cervical back subcutaneous immunotherapy for for group B). AR model was established with ovalbumin. At 25 to 55 days,ovalbumin im-munotherapy were performed in treatment groups,once two days,15 times totally. After intranasal rechallenge was performed at 56 to 62 days the AR symptom scores were documented. The eosinophils(EOS)in the nasal mucosa were measured by chromotropic acid 2R staining. Ovalbumin-specific IgE( OVA-sIgE) in the serum and expression of interferon-γ and interleukin-4 in the nasal lavage were measured by enzyme-linked immunosorbent assay meanwhile the ratio of interferon-γ and interleukin-4 was calc μlated. SPSS17. 0 software was used to analyze the data. Results:Before treatment ,the AR symptom scores of the model and treatment groups were more than 5. After treatment,the treatment A group were less than 5. The EOS count of the control A,model A,treatment A groups and the control B,model B, treatment B groups was 0. 78 ± 0. 31, 21. 60 ± 2. 90, 10. 43 ± 2. 56, 0. 83 ± 0. 46, 22. 44 ± 3. 39, 23. 40 ± 4. 24, respectively. The EOS count of the treatment A group was significantly lower than those in model A group ( P0. 05 ) . OVA-sIgE expressed was negative in control groups and positive in other groups. The ratio of interferon-γ and interleukin-4 was 10. 75 ± 3. 38,10. 38 ± 3. 08,3. 02 ± 0. 69,2. 71 ± 0. 89,2. 52 ± 0. 30,5. 45±1. 41,respectively. The ratio in treatment A group was significantly higher than those in model A group(P0. 05 ) . Conclusion: Inguinal subcutaneous immunotherapy has a good effect on this disease. It spends short time ,has simple operation and good feasibility,which is a novel treatment method for AR in mice.
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Objective To investigate the effects of simultaneous multi-level surgery for moderate to severe obstructive sleep apnea hypopnea syndrome (OSAHS). Methods A retrospective analysis was made on surgical cases of one hundred and thirty seven patients with moderate to severe OSAHS diagnosed by polysomnography (PSG). They were divided into multi-level group (n = 95) and UPPP group (n = 42). The two groups were compared in terms of postoperative complications as well as the related indicators of PSG , calgary sleep apnea quality of life index (SAQLI), epworth sleepiness scale (ESS), snore scales (SS) before operation and after operation. Results Just one patient in the multi-level group had difficulties in respiration and was rescued by timely tracheotomy. The AHI, LSaO2, TS90%, the total score and the scores on the four dimensions of SAQLI, ESS score, SS score in the multi-level group were significantly improved as compared both to the results after operation (P < 0.01) and to the UPPP group (P < 0.05). But only the AHI, LSaO2 and TS90% in the UPPP group were improved (P < 0.05). Conclusions The multi-level surgery is a safe and feasible therapy or moderate to severe OSAHS. The evaluation in subjective and objective ways can be more accurate in comprehensive reflecting the surgical efficacy and effects of OSAHS on patients′ of life quality.
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Previous studies suggested that smoking and passive smoking could increase the risk of breast cancer, but the results were inconsistent, especially for Chinese females. Thus, we systematically searched cohort and case-control studies investigating the associations of active and passive smoking with breast cancer risk among Chinese females in four English databases (PubMed, Embase, ScienceDirect, and Wiley) and three Chinese databases (CNKI, WanFang, and VIP). Fifty-one articles (3 cohort studies and 48 case-control studies) covering 17 provinces of China were finally included in this systematic review. Among Chinese females, there was significant association between passive smoking and this risk of breast cancer [odds ratio (OR): 1.62; 95% confidence interval (CI): 1.39-1.85; I2 = 75.8%, P < 0.001; n = 26] but no significant association between active smoking and the risk of breast cancer (OR: 1.04; 95% CI: 0.89-1.20; I2 = 13.9%, P = 0.248; n = 31). The OR of exposure to husband's smoking and to smoke in the workplace was 1.27 (95% CI: 1.07-1.50) and 1.66 (95% CI: 1.07-2.59), respectively. The OR of light and heavy passive smoking was 1.11 and 1.41, respectively, for women exposed to their husband's smoke (< 20 and ≥ 20 cigarettes per day), and 1.07 and 1.87, respectively, for those exposed to smoke in the workplace (< 300 and ≥ 300 min of exposure per day). These results imply that passive smoking is associated with an increased risk of breast cancer, and the risk seems to increase as the level of passive exposure to smoke increases among Chinese females. Women with passive exposure to smoke in the workplace have a higher risk of breast cancer than those exposed to their husband's smoking.
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Femenino , Humanos , Neoplasias de la Mama , China , Estudios de Cohortes , Exposición Profesional , Oportunidad Relativa , Factores de Riesgo , Fumar , Contaminación por Humo de TabacoRESUMEN
This study aimed to evaluate the diagnostic and prognostic significance of serum bone sialoprotein (BSP) and prostate-specific antigen doubling time (PSADT) in patients with bone metastasis (BM) from prostate cancer (PC). A total of 116 patients with PC, 120 patients with benign prostatic hyperplasia (BPH) and 120 healthy controls were enrolled in this study. PC patients were divided into bone metastasis (BM) group (n=56) and non-bone metastasis (NBM) group (n=60). Serum BSP was detected by Sandwich ELISA. Severity of bone pain was evaluated using visual analogue score (VAS). Serum f-PSA and t-PSA levels were measured by using electrochemiluminescence immunoassay (ECLIA). PSADT was calculated according to the formula: PSADT=lg(2)/[log(PSA2)-log(PSA1)]. The mean serum BSP level in PC patients with BM was significantly higher than in PC patients without BM, BPH patients and controls (P<0.001 for all). Pearson's analysis showed that serum BSP level was positively correlated with VAS in PC patients with BM (P<0.05). Receiver operating characteristics (ROC) analysis demonstrated that BSP discriminated patients with BM from those without BM at the cutoff value of 33.26 ng/mL. The sensitivity and specificity were 78.21% and 79.28%, respectively. The optimal cutoff value of PSADT was 131 days, with sensitivity of 85.69% and specificity of 85.36%. Kaplan-Meier analysis revealed that subjects with higher BSP levels/shorter PSADT had a shorter BM-free period than those with lower BSP levels/longer PSADT. Serum BSP and PSADT are useful biomarkers for the diagnosis of BM from PC, and can be regarded as independent factors for predicting the prognosis of BM from PC. Combined determination of BSP and PSADT can improve accuracy and positive rate of BM from PC significantly.
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This study aimed to evaluate the diagnostic and prognostic significance of serum bone sialoprotein (BSP) and prostate-specific antigen doubling time (PSADT) in patients with bone metastasis (BM) from prostate cancer (PC). A total of 116 patients with PC, 120 patients with benign prostatic hyperplasia (BPH) and 120 healthy controls were enrolled in this study. PC patients were divided into bone metastasis (BM) group (n=56) and non-bone metastasis (NBM) group (n=60). Serum BSP was detected by Sandwich ELISA. Severity of bone pain was evaluated using visual analogue score (VAS). Serum f-PSA and t-PSA levels were measured by using electrochemiluminescence immunoassay (ECLIA). PSADT was calculated according to the formula: PSADT=lg(2)/[log(PSA2)-log(PSA1)]. The mean serum BSP level in PC patients with BM was significantly higher than in PC patients without BM, BPH patients and controls (P<0.001 for all). Pearson's analysis showed that serum BSP level was positively correlated with VAS in PC patients with BM (P<0.05). Receiver operating characteristics (ROC) analysis demonstrated that BSP discriminated patients with BM from those without BM at the cutoff value of 33.26 ng/mL. The sensitivity and specificity were 78.21% and 79.28%, respectively. The optimal cutoff value of PSADT was 131 days, with sensitivity of 85.69% and specificity of 85.36%. Kaplan-Meier analysis revealed that subjects with higher BSP levels/shorter PSADT had a shorter BM-free period than those with lower BSP levels/longer PSADT. Serum BSP and PSADT are useful biomarkers for the diagnosis of BM from PC, and can be regarded as independent factors for predicting the prognosis of BM from PC. Combined determination of BSP and PSADT can improve accuracy and positive rate of BM from PC significantly.
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Humanos , Masculino , Biomarcadores de Tumor , Sangre , Neoplasias Óseas , Sangre , Patología , Osteopontina , Sangre , Antígeno Prostático Específico , Sangre , Neoplasias de la Próstata , Sangre , PatologíaRESUMEN
LEPA is one of the most conserved translation factors and is found from bacteria to higher plants. However, the physiological function of the chloroplast LEPA homolog in higher plants remains unknown. Herein, we demonstrate the physiological role of cpLEPA in enabling efficient photosynthesis in higher plants. The cplepa-1 mutant displays slightly high chlorophyll fluorescence and pale green phenotypes under normal growth conditions. The growth of the cplepa-1 mutant is reduced when grown on soil, and greater reduction is observed under intense light illumination. Photosynthetic activity is impaired in the cplepa-1 mutants, which is reflected in the decreased steady-state levels of chloroplast proteins. In vivo protein labeling experiments explained the decrease in the steady-state levels of chloroplast proteins. An abnormal association of the chloroplast-encoded mRNAs with ribosomes suggests that the protein synthesis deficiencies in cplepa-1 are due to defects in translation initiation in the chloroplasts. The cpLEPA protein appears to be an essential translation factor that promotes the efficiency of chloroplast protein synthesis.
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Proteínas de Arabidopsis/genética , Arabidopsis/genética , Arabidopsis/metabolismo , Cloroplastos/genética , Cloroplastos/metabolismo , Factores Eucarióticos de Iniciación/genética , Biosíntesis de Proteínas , Secuencia de Aminoácidos , Arabidopsis/crecimiento & desarrollo , Proteínas de Arabidopsis/química , Proteínas de Arabidopsis/metabolismo , Secuencia Conservada , Factores Eucarióticos de Iniciación/química , Factores Eucarióticos de Iniciación/metabolismo , Regulación de la Expresión Génica de las Plantas , Técnicas de Inactivación de Genes , Orden Génico , Datos de Secuencia Molecular , Mutación , Factor G de Elongación Peptídica/química , Fenotipo , Transporte de Proteínas , ARN Mensajero/genética , ARN Mensajero/metabolismo , Ribosomas , Alineación de Secuencia , Tilacoides/metabolismoRESUMEN
Podophyllotoxin (PPT) and its derivatives exert significant anti-cancer activities, and one derivative etoposide is often utilized to treat various cancers in the clinic. The aim of the present study is to investigate the inhibitory effects of PPT on major cytochrome P450 (CYP) isoforms in human livers. Inhibition of CYP3A4, CYP2C9, CYP2C8, CYP2D6, CYP2E1 and CYP2A6 by PPT was investigated in the human liver microsomal system. Time-dependent inhibition of CYP3A4 by PPT was also evaluated. The results showed that PPT strongly exhibited inhibitory effects on CYP3A4 and CYP2C9 in a concentration-dependent manner. Half inhibition concentration (IC50) was 1.1 +/- 0.3 and 4.6 +/- 0.3 meu M for CYP3A4 and CYP2C9, respectively. Inhibition kinetic analysis showed that PPT exhibited competitive inhibition towards CYP3A4 and CYP2C9 with Ki of 1.6 and 2.0 meu M, respectively. Additionally, PPT exerted time-dependent inhibition towards CYP3A4 and the kinetic parameters were 4.4+/- 2.1 meu M and 0.06 +/- 0.01 min-1 for KI and kinact, respectively. Our experimental data indicate that potential drug-drug interaction (DDI) might exist when PPT is co-administered with the substrates which mainly undergo CYP3A4- or CYP2C9-mediated metabolism.
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Antineoplásicos Fitogénicos/farmacología , Hidrocarburo de Aril Hidroxilasas/antagonistas & inhibidores , Inhibidores del Citocromo P-450 CYP3A , Microsomas Hepáticos/efectos de los fármacos , Podofilotoxina/farmacología , Citocromo P-450 CYP2C9 , Citocromo P-450 CYP3A , Pruebas de Enzimas , Humanos , CinéticaRESUMEN
<p><b>OBJECTIVE</b>To study the suitable oxygen concentration in hypoxic preconditioning.</p><p><b>METHODS</b>Short-term and long-term intermittent hypoxia modes were designed and the effects of various oxygen concentrations on body weight, blood oxygen saturation, swimming capability were analyzed.</p><p><b>RESULTS</b>The rate of body weight gain in rat model decreased gradually when exposed to hypoxia environment for long time. When the concentration of oxygen changed from 15% to 8%, accompanied with the decreasing of oxygen concentration, a platform was observed in blood oxygen saturation of rat model after hypoxic preconditioning training. Rat swimming capability improved significantly. After trained in 10% hypoxia environment, the swimming capability of kunming mice improved obviously.</p><p><b>CONCLUSION</b>Proper level of hypoxic preconditioning training could improve hypoxia tolerance and enhance the rat sport capability significantly. 15%-10% oxygen concentration range could be regarded as a helpful effective area for hypoxic preconditioning, 10% oxygen concentration might be the eligible concentration for hypoxic preconditioning training.</p>
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Animales , Masculino , Ratas , Adaptación Fisiológica , Fisiología , Peso Corporal , Hipoxia , Precondicionamiento Isquémico , Oxígeno , Metabolismo , Resistencia Física , Fisiología , Ratas WistarRESUMEN
<p><b>OBJECTIVE</b>To explore the secular trend in incidence and mortality rate of gastric cancer in Tianjin and to provide evidence and reference for making prevention and control strategy for gastric cancer.</p><p><b>METHODS</b>Data derived from Tianjin cancer registry system were analyzed by descriptive epidemiological method and Joinpoint model. A total of 17990 gastric cancer cases reported in Tianjin from 1981 to 2002, including 12755 males and 5235 females were studied.</p><p><b>RESULTS</b>The annual percent change (APC) of crude incidence rate for males and females was -0.92% (Z = -3.85, P = 0.001) and -0.79% (Z = -2.67, P = 0.015), while the APC of standard incidence rate was -3.55% (Z = -13.52, P = 0.000) and -3.47% (Z = -12.85, P = 0.000). There was a descending trend of incidence rate in males and females above 45-years-old, however, in male under 45 years it showed an increased trend and in females it kept stable. The APC of crude mortality rate was -1.66% ( Z = -5.79, P = 0.000) for males and -1.84% (Z = -6.02,P = 0.000) for females, while the APC of standard mortality rate was -4.60% ( Z = -15.79, P = 0.000) for females and -5.36% ( Z = -8.28, P = 0.000) for males during 1989-2002. Mortality and incidence ratio also indicated a downward trend.</p><p><b>CONCLUSION</b>Despite its declining trend in Tianjin, gastric cancer still remains an important public health problem in facing of the aging society and many risk factors.</p>
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Adolescente , Adulto , Anciano , Niño , Preescolar , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Persona de Mediana Edad , China , Epidemiología , Incidencia , Factores de Riesgo , Neoplasias Gástricas , Epidemiología , Mortalidad , Tasa de SupervivenciaRESUMEN
<p><b>OBJECTIVE</b>To establish a determination method of astragulin in Thesium chinese.</p><p><b>METHOD</b>RP-HPLC analytical method was established using a Polaris C18 column and acetonitrile-water (23:77) as the mobile phase, with a flow rate of 10 mL x min(-1), detected at 346 nm. The method of sample is refluxing exation by 50% alcohol for 2 times.</p><p><b>RESULT</b>The content of astragulin was from 0. 120% to 0. 155%, in different groups of T. chinese collected from the same location.</p><p><b>CONCLUSION</b>The method was validated to show convenient and reliable.</p>