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1.
J Nanosci Nanotechnol ; 14(6): 4706-9, 2014 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-24738450

RESUMEN

The effects of different temperatures on the hydrogen sorption characteristics of double-walled carbon nanotubes (DWCNTs) with palladium loading have been investigated. When we use different temperatures, the particle sizes and specific surface areas of the samples are different, which affects the hydrogen storage capacity of the DWCNTs. In this work, the amount of hydrogen storage capacity was determined (by AMC Gas Reactor Controller) to be 1.70, 1.85, 2.00, and 1.93 wt% for pristine DWCNTS and for 2%Pd/DWCNTs-300 degrees C, 2%Pd/DWCNTs-400 degrees C, and 2%Pd/DWCNTs-500 degrees C, respectively. We found that the hydrogen storage capacity can be enhanced by loading with 2% Pd nanoparticles and selecting a suitable temperature. Furthermore, the sorption can be attributed to the chemical reaction between atomic hydrogen and the dangling bonds of the DWCNTs.


Asunto(s)
Hidrógeno/química , Hidrógeno/aislamiento & purificación , Nanoestructuras/química , Nanoestructuras/ultraestructura , Nanotubos de Carbono/química , Paladio/química , Adsorción , Ensayo de Materiales , Conformación Molecular , Tamaño de la Partícula , Porosidad , Propiedades de Superficie , Temperatura
2.
BMC Med Genet ; 11: 83, 2010 Jun 02.
Artículo en Inglés | MEDLINE | ID: mdl-20525207

RESUMEN

BACKGROUND: Hepatitis B virus (HBV) infection causes large amount of unfolding or false-folding protein accumulation in the endoplasmic reticulum (ER), which in turn induces the expression of glucose-regulated protein 78 (GRP78). The aim in the present study was to analyse the potential association between GRP78 single-nucleotide polymorphisms (SNPs) and the risk of HBV infection. METHODS: The associations between seven common GRP78 polymorphisms in the promoter (rs391957, rs17840762, rs17840761, rs11355458) and in the 3' untranslated region (UTR) (rs16927997, rs1140763, rs12009) and possible risk of chronic HBV infection were assessed in a case-control study. 496 cases and 539 individually matched healthy controls were genotyped. RESULTS: Overall, no associations were observed in genotypic analyses. In addition, haplotypes and diplotypes combining those SNPs in the promoter or in the 3' UTR in high linkage disequilibrium (LD) were also not associated with HBV risk. CONCLUSION: These observations do not support a role for GRP78 polymorphisms in HBV infection in a predominantly Chinese Han population.


Asunto(s)
Pueblo Asiatico/genética , Hepatitis B Crónica/genética , Hepatitis B/genética , Polimorfismo Genético , Regiones no Traducidas 3' , Estudios de Casos y Controles , Susceptibilidad a Enfermedades , Chaperón BiP del Retículo Endoplásmico , Genotipo , Proteínas HSP70 de Choque Térmico , Haplotipos , Virus de la Hepatitis B/genética , Humanos , Infecciones/genética , Desequilibrio de Ligamiento , Proteínas de la Membrana , Polimorfismo de Nucleótido Simple , Grupos de Población/genética , Secuencias Reguladoras de Ácidos Nucleicos , Virus/genética
3.
J Phys Chem C Nanomater Interfaces ; 123(22): 13458-13466, 2019 Jun 06.
Artículo en Inglés | MEDLINE | ID: mdl-31205577

RESUMEN

We report that UV-ozone treatment of TiO2 anatase thin films is an efficient method to increase the conductance through the film by more than 2 orders of magnitude. The increase in conductance is quantified via conductive scanning force microscopy on freshly annealed and UV-ozone-treated TiO2 anatase thin films on fluorine-doped tin oxide substrates. The increased conductance of TiO2 anatase thin films results in a 2% increase of the average power conversion efficiency (PCE) of methylammonium lead iodide-based perovskite solar cells. PCE values up to 19.5% for mesoporous solar cells are realized. The additional UV-ozone treatment results in a reduced number of oxygen vacancies at the surface, inferred from X-ray photoelectron spectroscopy. These oxygen vacancies at the surface act as charge carrier traps and hinder charge extraction from the adjacent material. Terahertz measurements indicate only minor changes of the bulk conductance, which underlines the importance of UV-ozone treatment to control surface-based defects.

4.
Artículo en Zh | WPRIM | ID: wpr-885627

RESUMEN

Objective:To observe the effects of static 70° head-up tilted standing and of repeated body repositioning on hemodynamics in healthy young and middle-aged persons.Methods:The hemodynamics of 24 middle-aged and 23 younger persons were studied. Both groups were requested to perform static 70° head-up tilted standing and to repeatedly change their body position from 0° to 70° of tilt at a velocity of 1°/second for ten minutes in a random order. Before, between and after each test the subjects rested supine for ten minutes. Hemodynamic variables and blood pressure were recorded non-invasively.Results:The average heart rate (HR) increased significantly in both groups when rising from supine to the testing positions. In 70° tilted standing the average HR of the youth group, 84.0±9.5bpm, was significantly higher than that in the other position and that of the middle-aged group in the same position. The average HR of the middle-aged group in 70° tilted standing was also significantly higher than in the other position. Among the middle-aged group, the average stroke volume (SV) in the testing positions was significantly lower than when resting. Significant differences were observed in the average diastolic blood pressure (DBP) between the testing and rest positions for both groups, with the average DBP of the middle-aged group significantly higher than that of the youth group in all three positions. Among the youth group, the average SV, CO and systolic blood pressure (SBP) of the males were significantly higher than among the females in all of the different body positions.Conclusions:Young persons mainly rely on an increased heart rate to maintain cardiac output while middle-aged participants appear to achieve this through increased peripheral resistance. Repeated position changes have less impact on hemodynamics than 70° inclined standing, making it a safer and more stable training method. However, the long-term effects of such intervention need to be confirmed in further studies.

5.
Artículo en Zh | WPRIM | ID: wpr-905268

RESUMEN

Objective:To study the effect of physical therapy and heel sound feedback on lower limbs motor function, mobility and activities of daily living (ADL) for stroke patients based on International Classification of Functioning, Disability and Health (ICF) core set. Methods:From April, 2018 to May, 2020, 113 stroke patients with motor dysfunction were divided into ischemia group (n = 67) and hemorrhagia group (n = 46) according to the cause of stroke. They received physical therapy for lower limbs and heel sound feedback for eight weeks, and assessed with ICF core set for stroke-gait, Fugl-Meyer Assessment-Lower Extremities (FMA-LE), Timed 'Up and Go' Test (TUGT), and modified Barthel index (MBI) before and after intervention. Results:The main effect of time was significant for qualifiers of ICF core set for stroke-gait, the scores of FMA-LE and MBI, and TUGT time (F > 100.59, P < 0.001), and it improved time by time as Post Hoc test. The main effect of groups was not significant (F < 2.29, P > 0.05), nor as Post Hoc test. The interactive effect between time and groups was significant for TUGT time (F = 6.45, P < 0.01), perhaps improved more in the hemorrhagia group, however, the interactive effect was not significant for the others. Conclusion:Physical therapy and heel sound feedback can improve motor function of lower limb, mobility and ADL for stroke patients.

6.
J Pharm Biomed Anal ; 39(1-2): 263-7, 2005 Sep 01.
Artículo en Inglés | MEDLINE | ID: mdl-16085141

RESUMEN

The binding of 2,2'-diselenadibenzoic acid to bovine serum albumin (BSA) and human serum albumin (HSA) was studied by using fluorescence spectroscopy. The measurement was performed in Tris-HCl buffer aqueous medium at pH = 7.40. The quenching constant at 303 K was (3.277 +/- 0.046) x 10(13) L mol(-1) s(-1) for BSA, and (3.946 +/- 0.002) x 10(12) L mol(-1) s(-1) for HSA. Decreased quenching was observed in association with increased temperature. Our findings show that the observed binding constant is dependent on the ionic strength of the medium. It is said that electrostatic interactions play a role in the binding of 2,2'-diselenadibenzoic acid to serum albumin, in addition to the hydrophobic association. The decrease of the linearity of S-V plot demonstrates reduced binding of ligand to the protein in the presence of anionic surfactants such as sodium dodecyl sulfate (SDS), which indicates that 2,2'-diselenadibenzoic acid most likely binds to the hydrophobic pockets within sub-domain IIA of serum albumin, the same site as SDS.


Asunto(s)
Caproatos/química , Albúmina Sérica Bovina/química , Disulfuros , Concentración Osmolar , Dodecil Sulfato de Sodio , Espectrometría de Fluorescencia , Electricidad Estática , Temperatura
7.
J Nanosci Nanotechnol ; 15(6): 4510-5, 2015 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-26369073

RESUMEN

20 wt% Pt0.55Co0.45/C catalysts were prepared using a chemical reduction method, with Vulcan XC-72 conducting furnace black and double-walled carbon nanotubes (DWCNTs) as the carbon supports, respectively. The catalysts were compared with commercial BASF 20 wt% Pt/C (using Vulcan XC-72 carbon as support). The materials were characterized by X-ray diffraction and transmission electron microscopy (TEM). The electrochemical performance of the Pt/C and Pt0.55Co0.45/C catalysts was evaluated by cyclic voltammetry and steady-state measurements. Electrochemical measurements indicated that the Pt0.55Co0.45 nanocatalysts exhibited improved activity in the oxygen reduction reaction (ORR) on DWCNTs compared to those on Vulcan XC-72 carbon. It is suggested that DWCNTs will provide better catalysis support than Vulcan XC-72 carbon.

8.
J Pharm Pharmacol ; 56(9): 1127-33, 2004 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-15324481

RESUMEN

The binding of Schiff base selenide, (2-hydroxy-benzimido)ethyl-n-hexylselenide, to bovine serum albumin (BSA) was studied using fluorescence spectroscopy. The measurement was performed in Tris-HCl buffer aqueous medium at pH 7.4. Stern-Volmer graphs were plotted and quenching constants were estimated. The quenching constant at 303 K was (1.639 +/- 0.046) x 10(13) L mol(-1) s(-1). Decreased quenching was observed as temperature increased, but at the temperature range of 303-313 K, the association of Schiff base selenide to BSA was not significantly different. The static quenching presented in the system of Schiff base selenide and BSA. A complex was possibly formed between Schiff base selenide and BSA, which was responsible for the quenching of the fluorescence of BSA. This fact was also confirmed by differences in the absorption spectra of BSA before and after Schiff base selenide addition. The hydrophobic interaction was found to play a main role in the binding according to the thermodynamic parameters, enthalpy change (DeltaH) and entropy change (DeltaS) of reaction. Schiff base selenide most likely binds to the hydrophobic pockets within sub domain IIA of BSA, which can be proved by competition experiments for sodium dodecyl sulfate. By constant-wavelength synchronous fluorescence spectra, the influence of (2-hydroxy-benzimido)ethyl-n-hexylselenide on the surrounding environment of tyrosine and tryptophan residues in BSA was also investigated. The red shift of the fluorescence peak of tryptophan residues indicated that the hydrophobic amino acid structure surrounding tryptophan residues in BSA collapsed slightly after the addition of (2-hydroxy-benzimido)ethyl-n-hexylselenide.


Asunto(s)
Bases de Schiff/análisis , Bases de Schiff/metabolismo , Albúmina Sérica Bovina/análisis , Albúmina Sérica Bovina/metabolismo , Absorción/fisiología , Animales , Bovinos , Unión Proteica/fisiología , Espectrometría de Fluorescencia/métodos
9.
Di Yi Jun Yi Da Xue Xue Bao ; 24(8): 937-9, 2004 Aug.
Artículo en Zh | MEDLINE | ID: mdl-15321768

RESUMEN

OBJECTIVE: To compare the dose difference in irradiation dose between nasopharyngeal cancer patients receiving conventional radiotherapy (CR) and intensity-modulated radiotherapy (IMRT). METHODS: The various IMRT and the CR plans for patients with nasopharyngeal carcinoma were created by a three-dimensional treatment planning system (3D-TPS). The dose-volume histograms (DVH) of normal tissues and the total number of irradiation monitor units (MU) were calculated by 3D-TPS. The treatment was delivered with 6 MV photons using a "step-and-shoot" technique on a linear accelerator. The X-ray leakage and scattered dose (LSD) at the dmax (maximal dose depth) in water were measured by dosimeter and ion chamber. The dose delivered to normal tissue adjacent to the treatment site at a certain distance was estimated by using LSD and the total MU for different radiotherapy methods. RESULTS: To IMRT patients, the volumes of normal tissues receiving the dose less than 28 Gy and higher than 35 Gy were 1.43-1.81 and 0.70-0.30 times those of CR patients respectively. The LSD irradiated that to the IMRT patients was about two times of the CR patients. CONCLUSION: The dose received by normal tissues in IMRT is two times that in CR.


Asunto(s)
Neoplasias Nasofaríngeas/radioterapia , Radioterapia de Intensidad Modulada , Humanos , Dosificación Radioterapéutica , Planificación de la Radioterapia Asistida por Computador
10.
Di Yi Jun Yi Da Xue Xue Bao ; 23(10): 1093-4, 1098, 2003 Oct.
Artículo en Zh | MEDLINE | ID: mdl-14559704

RESUMEN

OBJECTIVE: To explore the short-term effect of radiofrequency ablation (RFA) combined with arterial embolization in treating patients with primary liver cancer. METHODS: Thirty patients with primary liver cancer received the combined treatment and the pre- and post-operative alpha-fetoprotein (AFP) levels, imaging features, and liver function were investigated along with observation of the incidence of complications to evaluate the therapeutic effects. RESULTS: The post-operative AFP positivity and the tumor density were significantly reduced in these patients, and their one-year survival rate reached 96.7% with only minor complications observed. CONCLUSION: RFA combined with arterial embolization is effective for primary liver cancer.


Asunto(s)
Ablación por Catéter , Quimioembolización Terapéutica , Neoplasias Hepáticas/terapia , Adulto , Anciano , Terapia Combinada , Femenino , Humanos , Neoplasias Hepáticas/diagnóstico por imagen , Neoplasias Hepáticas/mortalidad , Masculino , Persona de Mediana Edad , Tasa de Supervivencia , Tomografía Computarizada por Rayos X , alfa-Fetoproteínas/análisis
11.
Artículo en Zh | WPRIM | ID: wpr-801777

RESUMEN

Objective: To screen the frosting qualitymarkers (Q-marker) of Mori Foliumand identify Mori Folium after frost. Method: The HPLC-DAD-MSn fingerprints of Mori Folium before and after frost were established,the common peaks were markedand the characteristic components were selected by orthogonal partial least squares discrimination analysis (OPLS-DA). The components with a large content change were used as marker components,and the relatively stable component was used as an internal reference component. The ratio of the marker components to the peak area of the internal reference component was used as component characteristic to identify the frost of Mori Folium,andqualitative study of frosting markerswere performed by MSn and authentic standards. Result: The fingerprints were established and 33 common peaks were marked. Through OPLS-DA,peaks 1,23,14 were determined as marker components,peak 12 was determined as internal reference component. The frosting quality markers of Mori Folium were characterized as citric acid derivatives,saponin F,tryptophan and neochlorogenic acid by MSn and standards. The ratios of the peak areas of citric acid derivatives,saponin F,tryptophan and neochlorogenic acid before and after frost were 0.15±0.054,1.0±0.48; 0.14±0.073,0.98±0.48,0.13±0.088,0.89±0.49,respectively. Conclusion: In the fingerprints established in this study,the peak area ratios of citric acid derivatives,saponin F,tryptophan to new chlorogenic acid had specificity,which can be used as frosting quality markers for identification of Mori Folium. This study expanded the connotation of the Q-marker specificity of traditional Chinese medicine. The results can provide experimental data for the quality evaluation and drug-forming properties of Mori Folium,and provide reference for similar research.

12.
Biomed Mater Eng ; 24(1): 85-94, 2014.
Artículo en Inglés | MEDLINE | ID: mdl-24211886

RESUMEN

To date, commercial 4D-CT systems typically depend on an external respiratory monitoring device. Immobilizing patients in a thermoplastic mask while receiving radiotherapy may result in a failure of 4D-CT reconstruction. The aim of this study is to investigate the feasibility of 4D-CT reconstruction based on a method using pulmonary average CT values (ACV) without an external respiratory monitoring device. The ACV of the whole lung assumes cyclical variation during respiration. Phases of CT images were identified by calculating the ACV over time. Subsequently, five sets of 4D-CT images based on a Real-time Position Management (RPM) system were selected to verify the ACV method. The entire lung CT datasets of another sixteen free-breathing patients were acquired in Cine scan mode for multiple couch positions. The phase of every CT image was identified and re-sorted into different phase 4D-CT volumes by analyzing the time dependence of the corresponding ACVs. This paper demonstrates the ACV method using the 4D-CT data sets based on the RPM system. Convenient and reliable 4D-CT reconstruction can be accomplished without any external respiratory monitoring device using ACVs.


Asunto(s)
Tomografía Computarizada Cuatridimensional/métodos , Pulmón/diagnóstico por imagen , Interpretación de Imagen Radiográfica Asistida por Computador/métodos , Bases de Datos Factuales , Humanos , Pulmón/patología , Máscaras , Modelos Teóricos , Lenguajes de Programación , Radiografía Abdominal , Radiografía Torácica , Radioterapia , Respiración , Restricción Física , Programas Informáticos
13.
Chinese Journal of School Health ; (12): 152-156, 2023.
Artículo en Zh | WPRIM | ID: wpr-964395

RESUMEN

Abstract@#The popularity of electronic devices helps the spread of the flow experience. Flow experience affects many aspects of life for adolescents as for its double articulation. In order to provide suggestions for the improvement in adolescent mental health, this paper reviews flow experience and adolescent mental health in different situations. In learning situation, the state of flow makes a difference in students self confidence, learning experience, positive affect in school, positivity, self esteem and self efficacy, etc., at the same time, it is beneficial to relieve academic pressure and academic procrastination. In entertainment situation, the state of flow experience directly leads to addiction, and indirectly affects online game addiction by the mediating roles of self control and cognitive bias.

14.
Artículo en Zh | WPRIM | ID: wpr-693351

RESUMEN

The Chinese Food and Drug Administration issued the new Good Laboratory Practice(GLP)for nonclinical safety studies in September 2017,which emphasizes the peer review during the pathology practice.Pathology peer review could verify and im?prove the accuracy and quality of pathology diagnoses and interpretations in discussion.Pathology peer review is recommended when important risk assessment or business decisions are based on nonclinical studies.The objectives of this review are to provide a unified interpretation of the new regulation and recommend compliant processes for organizations to implement.

15.
World J Gastroenterol ; 16(11): 1422-4, 2010 Mar 21.
Artículo en Inglés | MEDLINE | ID: mdl-20238412

RESUMEN

The authors report a giant hepatocellular carcinoma (HCC) with a diameter over 30 cm and weight over 10 kg that was resected completely. A 62-year-old man was admitted because of continuous abdominal uplift. A computed tomography scan demonstrated that the entire abdomen was filled with a giant tumor containing both cystic and solid components with a size of 29 cm x 22 cm. The huge tumor was successfully resected without any complication, such as massive hemorrhage or visceral injuries. The size and weight of the tumor were 35 cm x 30 cm x 15 cm and 10 050 g, respectively. Pathological examination showed that the tumor was a well-differentiated HCC, and alpha-fetoprotein was positive. Postoperative syndrome, characterized by hypovolemic shock, diarrhea and urine retention, was observed and induced by abdominal decompression. This syndrome was resolved with expectant treatment. The patient was still alive without recurrence after a 27-mo follow-up.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Carcinoma Hepatocelular/diagnóstico por imagen , Carcinoma Hepatocelular/patología , Carcinoma Hepatocelular/cirugía , Humanos , Neoplasias Hepáticas/diagnóstico por imagen , Neoplasias Hepáticas/patología , Neoplasias Hepáticas/cirugía , Masculino , Persona de Mediana Edad , Complicaciones Posoperatorias , Tomografía Computarizada por Rayos X , Resultado del Tratamiento
16.
World J Gastroenterol ; 16(15): 1901-7, 2010 Apr 21.
Artículo en Inglés | MEDLINE | ID: mdl-20397270

RESUMEN

AIM: To investigate the procedure, feasibility and effects of laparoscope-assisted continuous circulatory hyperthermic intraperitoneal perfusion chemotherapy (CHIPC) in treatment of malignant ascites induced by peritoneal carcinomatosis from gastric cancers. METHODS: From August 2006 to March 2008, the laparoscopic approach was used to perform CHIPC on 16 patients with malignant ascites induced by gastric cancer or postoperative intraperitoneal seeding. Each patient underwent CHIPC three times after laparoscope-assisted perfusion catheters placing. The first session was completed in operative room under general anesthesia, 5% glucose solution was selected as perfusion liquid, and 1500 mg 5-fluorouracil (5-FU) and 200 mg oxaliplatin were added in the perfusion solution. The second and third sessions were performed in intensive care unit, 0.9% sodium chloride solution was selected as perfusion liquid, and 1500 mg 5-FU was added in the perfusion solution alone. CHIPC was performed for 90 min at a velocity of 450-600 mL/min and an inflow temperature of 43 +/- 0.2 degrees C. RESULTS: The intraoperative course was uneventful in all cases, and the mean operative period for laparoscope-assisted perfusion catheters placing was 80 min for each case. No postoperative deaths or complications related to laparoscope-assisted CHIPC occurred in this study. Clinically complete remission of ascites and related symptoms were achieved in 14 patients, and partial remission was achieved in 2 patients. During the follow-up, 13 patients died 2-9 mo after CHIPC, with a median survival time of 5 mo. Two patients with partial remission suffered from port site seeding and tumor metastasis,and died 2 and 3 mo after treatment. Three patients who are still alive today survived 4, 6 and 7 mo, respectively. The Karnofsky marks of patients (50-90) increased significantly (P < 0.01) and the general status improved after CHIPC. Thus satisfactory clinical efficacy has been achieved in these patients treated by laparoscopic CHIPC. CONCLUSION: Laparoscope-assisted CHIPC is a safe, feasible and effective procedure in the treatment of debilitating malignant ascites induced by unresectable gastric cancers.


Asunto(s)
Ascitis/patología , Quimioterapia del Cáncer por Perfusión Regional/métodos , Laparoscopía/métodos , Neoplasias Peritoneales/patología , Neoplasias Gástricas/patología , Adulto , Anciano , Antineoplásicos/farmacología , Ascitis/tratamiento farmacológico , Femenino , Fluorouracilo/farmacología , Humanos , Masculino , Persona de Mediana Edad , Compuestos Organoplatinos/farmacología , Oxaliplatino , Perfusión , Neoplasias Peritoneales/tratamiento farmacológico , Inducción de Remisión , Neoplasias Gástricas/tratamiento farmacológico
17.
Zhongguo Zhong Yao Za Zhi ; (24): 2090-2095, 2015.
Artículo en Zh | WPRIM | ID: wpr-337978

RESUMEN

According to the transcriptome dataset of Panax notoginseng, the key geranylgeranyl pyrophosphate synthase gene (GGPPS) in terpenoid backbone biosynthesis was selected to be cloned. Using specific primer pairs combining with RACE (rapid amplification of cDNA ends) technique, the full-length cDNA sequence with 1 203 bp, which containing a 1 035 bp open reading frame, was cloned and named as PnGGPPS. The corresponding full-length DNA sequence contained 2 370 bp, consisted of 1 intron and 2 exons. The deduced protein PnGGPPS contained 344 amino acids and shared more than 73% identity with GGPPS from Ricinus communis and Salvia miltiorrhiza. PnGGPPS also had specific Aspartic acid enrichment regions and other conserved domains, which belonged to the Isoprenoid-Biosyn-C1 superfamily. The quantitative real-time PCR showed that PnGGPPS expressed in different tissues of 1, 2, 3 years old root, stem, leaf and 3 years old flower, and the expression level in 3 years old leaf was significant higher than that in other organs, which suggested that it might not only be involved in the regulation of the growth and development, but also be associated with the biosynthesis of chlorophyll and carotenoids, the development of chloroplast, the shade habit and the quality formation of P. notoginseng.


Asunto(s)
Clonación Molecular , Biología Computacional , Geranilgeranil-Difosfato Geranilgeraniltransferasa , Genética , Panax notoginseng , Genética , Reacción en Cadena en Tiempo Real de la Polimerasa
18.
World J Gastroenterol ; 16(39): 4986-91, 2010 Oct 21.
Artículo en Inglés | MEDLINE | ID: mdl-20954287

RESUMEN

AIM: To explore expressions of PIK3CA in the progression of gastric cancer from primary to metastasis and its effects on activation of phosphatidylinositol 3-kinase (PI3K)/Akt pathway. METHODS: mRNA and protein levels of PIK3CA were assessed, respectively, by real-time quantitative polymerase chain reaction and immunohistochemistry in specimens of normal gastric mucosa, primary foci and lymph node and distant metastasis of gastric cancer. Akt and phosphorylated Akt protein were also examined by Western blotting in these tissues, in order to analyze the effect of PIK3CA expression level changes on the activation of PI3K/Akt signaling pathway. RESULTS: PIK3CA mRNA in lymph node metastasis were approximately 5 and 2 folds higher, respectively, than that in the corresponding normal gastric mucosa and primary gastric cancer tissues (P < 0.05), while no statistical significance was found compared with distant metastasis. Immunohistochemically, PIK3CA protein expression was discovered in 7 (35%) specimens of 20 primary foci vs 10 (67%) of 15 of lymph node metastasis or 11 (61%) of 18 of distant metastasis (35% vs 67%, P = 0.015; 35% vs 61%, P = 0.044). With the increased level of PIK3CA expression, the total Akt protein expression remained almost unchanged, but p-Akt protein was upregulated markedly. CONCLUSION: Increased expression of PIK3CA is expected to be a promising indicator of metastasis in gastric cancer. Up-regulation of PIK3CA may promote the metastasis of gastric cancer through aberrant activation of PI3K/Akt signaling.


Asunto(s)
Carcinoma/enzimología , Fosfatidilinositol 3-Quinasas/análisis , Neoplasias Gástricas/enzimología , Adulto , Anciano , Western Blotting , Carcinoma/genética , Carcinoma/secundario , Fosfatidilinositol 3-Quinasa Clase I , Femenino , Humanos , Inmunohistoquímica , Ganglios Linfáticos/enzimología , Ganglios Linfáticos/patología , Metástasis Linfática , Masculino , Persona de Mediana Edad , Estadificación de Neoplasias , Fosfatidilinositol 3-Quinasas/genética , Proteínas Proto-Oncogénicas c-akt/análisis , ARN Mensajero/análisis , Reacción en Cadena de la Polimerasa de Transcriptasa Inversa , Neoplasias Gástricas/genética , Neoplasias Gástricas/patología , Regulación hacia Arriba , Adulto Joven
19.
Zhongguo Zhong Yao Za Zhi ; (24): 330-333, 2015.
Artículo en Zh | WPRIM | ID: wpr-305299

RESUMEN

<p><b>OBJECTIVE</b>To compare the effects and mechanism of blood enriching on mouse model of blood deficiency syndrome induced by cyclophosphamide of albiflorin and paeoniflorin.</p><p><b>METHOD</b>Albiflorin and paeoniflorin were determined by using animal models of blood deficiency syndrome induced by cyclophosphamide. The amount of WBC, RBC, HGB, index of thymus gland and spleen, and the changes of GM-CSF, IL-3 and TNF-α in serum were detected after the treatment.</p><p><b>RESULT</b>Compared with the model group, the amount of WBC in the group of 30 mg x kg(-1) albiflorin and 30 mg x kg(-1) paeoniflorin were increased obviously (P < 0.01). The amount of RBC in the group of 30 mg x kg(-1) albiflorin and 30 mg x kg(-1) paeoniflorin were increased obviously (P < 0.01, P < 0.001), which did not had a significant difference compared with the same dose. The index of thymus gland in the group of 30 mg x kg(-1) albiflorin was superior to the model group (P < 0.01), the difference was significant compared with the same dose of paeoniflorin (P < 0.05). The GM-CSF in serum in all groups of 30 mg x kg(-1) albiflorin, 15 mg x kg(-1) albiflorin, 30 mg x kg(-1) paeoniflorin and 15 mg x kg(-1) paeoniflorin increased obviously (P < 0.01, P < 0.05, P < 0.01, P < 0.05); The IL-3 in serum in both group of 30 mg x kg(-1) albiflorin and 30 mg x kg(-1) paeoniflorin also increased (P < 0.001). The content of TNF-α in group of 30 mg x kg(-1) albiflorin and 30 mg x kg(-1) paeoniflorin were reduced (P < 0.01), which showed the obvious difference compared with the same dose group (P < 0.01).</p><p><b>CONCLUSION</b>Albiflorin had the effect of blood enriching by regulating the immune function, same with the paeoniflorin. The probable mechanism of nourishing blood and liver of Paeoniae Radix Alba was not only the better effect of adjusting the content of TNF-α, but also might act synergistically with paeoniflorin.</p>


Asunto(s)
Animales , Masculino , Ratones , Células Sanguíneas , Hidrocarburos Aromáticos con Puentes , Farmacología , Ciclofosfamida , Toxicidad , Glucósidos , Farmacología , Factor Estimulante de Colonias de Granulocitos y Macrófagos , Sangre , Hematopoyesis , Interleucina-3 , Sangre , Monoterpenos , Farmacología , Factor de Necrosis Tumoral alfa , Sangre
20.
Zhongguo Zhong Yao Za Zhi ; (24): 4869-4872, 2014.
Artículo en Zh | WPRIM | ID: wpr-341800

RESUMEN

<p><b>OBJECTIVE</b>To study the protective effect of Acai berries(Euterpe oleraceae) on chronic alcoholic hepatic injury in rats and their mechanism.</p><p><b>METHOD</b>Wistar rats were fed for 1 week and randomly divided into blank group, model group, Dongbao Gantai group, Acai 1.6, 0.8, 0.4 g . kg-1 groups. The blank group was given distilled water, and the other groups were orally given 56% white spirit (Erguotou) for eight weeks at the dosages of 8 mL . kg-1 in the 1st week, which increased by 0.1 mL week by week till to 15 mL . kg-1, in order to establish the chronic hepatic injury model, and observe the effect of Acai berry freeze-dried powder on hepatocyte membrane permeability, liver lipid peroxidation, changes in inflammatory cytokines and pathological changes in hepatocytes.</p><p><b>RESULT</b>Acai berries could significantly reduce serum ALT and AST(P<0.05), MDA(P<0.05), TG(P<0.05) and serum TNF-α and IL-6(P <0.05) and increase GSH and SOD(P <0.05). According to liver histopathological observation, livers in the model group were dominated by steatosis, some livers suffered spotty necrosis and inflammatory cell infiltration; The positive drug and Acai groups showed different changes in pathologic changes in rat livers.</p><p><b>CONCLUSION</b>Acai berries show s specific protective effect on alcoholic hepatic injury. Its mechanism may be correlated with the inhibition of such inflammatory factors as TNF-α and IL-6.</p>


Asunto(s)
Animales , Masculino , Ratas , Alanina Transaminasa , Sangre , Aspartato Aminotransferasas , Sangre , Enfermedad Crónica , Citocinas , Sangre , Euterpe , Química , Hepatocitos , Interleucina-6 , Sangre , Peroxidación de Lípido , Hígado , Hepatopatías Alcohólicas , Metabolismo , Patología , Extractos Vegetales , Farmacología , Ratas Wistar , Triglicéridos , Sangre , Factor de Necrosis Tumoral alfa , Sangre
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