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NSCs play an essential role in the regeneration process of the central nervous system. However, due to the influence of the harsh pathological microenvironment, the viability of neural stem cells is limited, and the therapeutic effect needs improvement. Previous studies have found that stem cells overexpressing ciliary neurotrophic factor (CNTF) have apparent therapeutic effects on remyelination, but the specific mechanism of action still needs to be further explored. We found that astrocytes, the most numerous groups in the CNS, exhibited a pathological role in the experimental autoimmune encephalomyelitis model, but after stimulation with CNTF-NSCs, a phenotypic switch occurred and induced the neurotrophic factor cardiotrophin-like cytokine 1 (Clcf1) production. Mechanistically, Clcf1 can significantly promote the differentiation of oligodendrocyte precursor cells (OPCs), and the advanced effect can attenuate by the Clcf1 antibody. Therefore, this study was conducted to investigate the pathway by which CNTF-NSCs exert their therapeutic effects by affecting astrocytes. It is expected to identify a potential therapeutic factor, Clcf1, for the treatment of demyelinating diseases.
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Células-Madre Neurales , Células Precursoras de Oligodendrocitos , Factor Neurotrófico Ciliar/farmacología , Células Precursoras de Oligodendrocitos/metabolismo , Astrocitos/metabolismo , Diferenciación Celular , Células-Madre Neurales/metabolismo , OligodendroglíaRESUMEN
@#AIM: To evaluate the changes of anterior chamber structure in patients after combined surgery of glaucoma and cataract with viscoelastics injection under the sclera valve by OCT. <p>METHODS: The cataract with acute glaucoma patients who underwent combined surgery of glaucoma and cataract from 2016 to 2018 were enrolled. The patients were divided into the viscoelastics group and the control group. The anterior chamber depth(ACD), the angle opening distance(AOD<sub>500</sub>)and the trabecular iris angle(TIA)were examined to compare the changes of the anterior chamber structure between the two groups. <p>RESULTS: At 1 and 3d after surgery, the ACD(3.82±0.51,3.71±0.63, 3.78±0.33mm), the angle opening distance(AOD<sub>500</sub>: 0.25±0.04, 0.24±0.04, 0.25±0.05mm)and the TIA(25.13°±8.06°, 26.18°±8.06°, 29.25°±6.22°)were statistically different between two groups. There was no significant difference on the ACD, the AOD<sub>500</sub> and the TIA of the two groups 7d after surgery(<i>P</i><0.05).<p>CONCLUSION: Viscoelastics injection under the sclera valve can deepen the anterior chamber effectively after combined surgery of glaucoma and cataract. It avoids the occurrence of shallow anterior chamber in the early postoperation and maintains the opening of anterior chamber.
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To inverstigate the alkaloids from the twigs and leaves of Ervatamia pandacaqui, eleven known alkaloids were isolated by silica gel, Sephadex LH-20, and ODS column chromatography, as well as RP-HPLC. Their structures were elucidated by UV, IR, MS, and NMR spectral data as coronaridine (1), 3-oxocoronaridine (2), 19S-heyneanine (3), 19R-heyneanine (4), voacangine (5), 3-oxovoacangine (6), voacristine (7), 19-epi-voacristine (8), iso-voacangine (9), coronaridine 7-hydroxyindolenine (10), and voacangine 7-hydroxyindolenine (11). Compounds 1-11 were isolated from E. pandacaqui for the first time.
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OBJECTIVES@#To analyse the Fourier transform infrared (FTIR) spectral data of renal tissue at different temperatures in rats after death, and to explore the effects of temperature on the FTIR spectral characteristics of renal tissue.@*METHODS@#The rats were sacrificed by cervical dislocation and placed at 4 ℃, 20 ℃ and 30 ℃. The FTIR spectral data of renal tissue were collected at different time points and analysed by data mining method.@*RESULTS@#The principal component analysis (PCA) results showed that there were significant trends of clustering in the samples of partial time point at 4 ℃, 20 ℃ and 30 ℃. Partial least square (PLS) regression models were established with the spectral data at three temperature groups. The performance of PLS regression models in 20 ℃ and 30 ℃ groups were more superior than that in 4 ℃ group, and the stability of the model in 20 ℃ group was better than that in 30 ℃ group.@*CONCLUSIONS@#There are differences in the FTIR spectral characteristics of renal tissue of rats after death at different temperatures. Temperature has a major impact on the performance of FTIR spectral PLS regression model. Therefore, in order to improve the accuracy of postmortem interval estimation, the effects of temperature on the model should be considered in the related study by spectral method.
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Animales , Ratas , Autopsia , Muerte , Cambios Post Mortem , Espectroscopía Infrarroja por Transformada de Fourier/métodos , TemperaturaRESUMEN
AIM: To study the clinical effects of using sodium hyaluronate in the glaucoma trabeculectomy. ·METHODS: Totally 46 patients were included in our research and they were divided into two groups. In the study group (23 cases 23 eyes), we used slice with MMC of 0. 4mg/mL in trabeculectomy. Before the conjunctiva flap was sewed, a small amount of sodium hyaluronate was injected into the space under scleral flap and the anterior chamber. In control group ( 23 cases 23 eyes ) , we only used MMC. After trabeculetomy, shallow anterior chambe formation, intraocular pressure, corneal endothelial injury and the formation of filter-bubble were observed in long term. ·RESULTS:IOP of study group at 1d after operation was higher than that of control group ( P0. 05). At 3d after operation, visual acuity decreased in 2 eyes (9%) of study group, 8 eyes (35%) in control group with significant different ( P = 0. 035 ). At 6mo after operation, visual acuity decreased in 0 of study group, 5 eyes (22%) in control group with significant different (P=0. 025 ). The differences on the occurrence of shallow anterior chamber at 7d after operation, formation of filter-bubble at 6mo after operation and corneal endothelial count were significant (P<0. 05). There were less postoperative complications in study group than in control group. ·CONCLUSION: Using sodium hyaluronate combined with MMC in trabeculectomy can greatly prevent the formation of shallow anterior chamber, filter-bubble scarring, and corneal endothelium dropout, make it possible to a safer surgery and a better outcome.
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Progressive tumor growth is dependent on angiogenesis. The mechanisms by which endothelial cells (ECs) are incorporated to develop new blood vessels are not well understood. Recent studies reveal that the ezrin radixin moesin (ERM) family members are key regulators of cellular activities such as adhesion, morphogenetic change, and migration. We hypothesized that ezrin, one of the ERM family members, may play important roles in ECs organization during angiogenesis, and new vessels formation in preexisting tissues. To test this hypothesis, in this study, we investigated the effects of ezrin gene silencing on the migration and angiogenesis of human umbilical vein endothelial cells (HUVECs) in vitro. HUVECs were transfected with plasmids with ezrin-targeting short hairpin RNA by using the lipofectamine-2000 system. Wound assay in vitro and three-dimensional culture were used to detect the migration and angiogenesis capacity of HUVECs. The morphological changes of transfected cells were observed by confocal and phase contrast microscopy. Our results demonstrated that the decreased expression of ezrin in HUVECs significantly induced the morphogenetic changes and cytoskeletal reorganization of the transfected cells, and also reduced cell migration and angiogenesis capacity in vitro, suggesting that ezrin play an important role in the process of HUVECs migration and angiogenesis.
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Humanos , Movimiento Celular , Genética , Proteínas del Citoesqueleto , Genética , Metabolismo , Citoesqueleto , Metabolismo , Células Endoteliales de la Vena Umbilical Humana , Biología Celular , Metabolismo , Fisiología , Neovascularización Fisiológica , GenéticaRESUMEN
Progressive tumor growth is dependent on angiogenesis. The mechanisms by which endothelial cells (ECs) are incorporated to develop new blood vessels are not well understood. Recent studies reveal that the ezrin radixin moesin (ERM) family members are key regulators of cellular activities such as adhesion, morphogenetic change, and migration. We hypothesized that ezrin, one of the ERM family members, may play important roles in ECs organization during angiogenesis, and new vessels formation in preexisting tissues. To test this hypothesis, in this study, we investigated the effects of ezrin gene silencing on the migration and angiogenesis of human umbilical vein endothelial cells (HUVECs) in vitro. HUVECs were transfected with plasmids with ezrin-targeting short hairpin RNA by using the lipofectamine-2000 system. Wound assay in vitro and three-dimensional culture were used to detect the migration and angiogenesis capacity of HUVECs. The morphological changes of transfected cells were observed by confocal and phase contrast microscopy. Our results demonstrated that the decreased expression of ezrin in HUVECs significantly induced the morphogenetic changes and cytoskeletal reorganization of the transfected cells, and also reduced cell migration and angiogenesis capacity in vitro, suggesting that ezrin play an important role in the process of HUVECs migration and angiogenesis.
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<p><b>OBJECTIVE</b>To investigate the association of 1858C/T polymorphism of protein tyrosine phosphatase nonreceptor type 22 (PTPN22) and rheumatoid arthritis (RA) susceptibility.</p><p><b>METHODS</b>CMB, wanfang (Chinese) and PubMed databases were searched to get the studies on the association between 1858C/T polymorphism and RA susceptibility, and odds ratio (OR) and 95% confidential interval (CI) were calculated under different genetic models. Then heterogeneity, stratified analysis, and publication bias test were conducted in the study.</p><p><b>RESULTS</b>A total of 32 studies (40 separate comparisons) with 25 059 RA patients and 25 466 controls were included in this meta-analysis. No evidence for publication bias was found in these studies. Meta-analysis showed an association between PTPN22 1858C/T polymorphism and RA (OR=1.606, 95%CI: 1.518-1.699, P<0.001). When stratified by ethnicity, T allele of PTPN22 1858C/T polymorphism was a risk allele in Caucasian (OR=1.612, 95%CI: 1.544-1.683, P<0.001); however, the polymorphism was not detected in Asians (or allele frequencies was extremely low). PTPN22 1858C/T polymorphism was associated with rheumatoid factor (RF) and anti-cyclic citrullinated peptide antibody (ACCP).</p><p><b>CONCLUSION</b>T allele of PTPN22 1858C/T polymorphism is associated with RA susaptibility in Caucasians. PTPN22 1858C/T polymorphism is significantly more prevalent in RF-positive or ACCP-positive patients than in RF-negative or ACCP-negative patients.</p>
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Humanos , Artritis Reumatoide , Genética , Población Blanca , Genética , Predisposición Genética a la Enfermedad , Polimorfismo de Nucleótido Simple , Proteína Tirosina Fosfatasa no Receptora Tipo 22 , GenéticaRESUMEN
Objective To investigate the relationship between electroencephalogram (EEG) reactivity combined with midbrain morphology and clinical outcomes of coma patients with severe head injury.Methods One hundred and sixteen coma patients with acute severe brain injury,admitted to our hospital from April 2011 to October 2012,were chosen in our study; EEG reactivity of the patients was monitored by digitized EEG monitoring system within 72 hours of admission,and the ratio of anteroposterior diameter and transverse diameter in the midbrain was measured under brain CT scan.The relations of EEG reactivity and ratio of anteroposterior diameter and transverse diameter with prognosis of these patients were statistically analyzed.Results Of the 116 patients,EEG reactivity examination showed response in 65 patients,including 57 patients with good prognosis; and the other 51 patients ECG reactivity showed no reaction,just 10 having good prognosis; the good prognosis rate in patients with positive EGG reactivity was significantly higher than that in patients with negative EGG reactivity (P<0.05).According to the ratio of anteroposterior diameter and transverse diameter in the midbrain,60 patients had a ratio of 0.9 to 1.1,including 48 having good prognosis,and 56 patients had a ratio of>1.1or<0.9,just 19 having good prognosis; the difference was statistically significant (P<0.05).The sensitivity and specificity in EEG reactivity combined with midbrain morphology in evaluating the prognosis of coma patients with severe traumatic brain injury were higher.Conclusion EEG reactivity combined with midbrain morphology can effectively assess the prognosis of coma patients with severe traumatic brain injury.
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The aim of the present study is to observe the dynamic changes of γ-tubulin in mouse somatic nuclear transferred (SCNT) embryos. The γ-tubulin was detected and analyzed in the enucleated oocyte and SCNT embryos by immunofluorescence and laser confocal microscopy. The results showed that γ-tubulin distributed in the cortex of the enucleated MII oocytes, and decreased in this area during the activation of oocytes. Meanwhile cytoplasmic asters appeared, but there was no spindle formed. Spindle formation could be observed in the enucleated oocytes which were injected with cumulus cells and activated by SrCl2. The spots-like γ-tubulin signals spread between chromosomes at the prophase, and the signals arrayed with spindle or aggregated at two poles of the spindle at the early metaphase. Furthermore, γ-tubulin signals were localized between the segregated sister chromatids at anaphase or telophase. Some reconstructed embryos exhibited advanced activation, showing abnormal spindles and aberrant distribution of γ-tubulin and chromosomes. Two spindles would be formed when the cumulus cell was injected into an intact oocyte, and the distribution of γ-tubulin was similar to that of the normal SCNT. Moreover, advanced activation also occurred in this case and formed either two small spindles or one big barrel-shaped spindle. These results suggest that γ-tubulin plays a pivotal role in spindle assembling in mouse SCNT embryos. The reconstructed oocytes were easily to be activated, and aberrant distribution of γ-tubulin is associated with formation of abnormal spindles and chromosome misalignment.
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Animales , Ratones , Embrión de Mamíferos , Metabolismo , Técnica del Anticuerpo Fluorescente , Metafase , Microscopía Confocal , Técnicas de Transferencia Nuclear , Oocitos , Biología Celular , Huso Acromático , Metabolismo , Telofase , Tubulina (Proteína) , MetabolismoRESUMEN
Objective To investigate the life quality status in autistic disorder children and its influencing factors.Methods Pediatric Quality of Life Inventory (PedsQL4.0) was used to measure the life quality of 200 children with autistic disorder and 120 healthy children.Application of Gesell Development Diagnosis Scale (1981) test was used for intelligence development.Clancy Autism Behavior Scale,Autism Behavior Checklist,and Childhood Autism Rating Scale were used to evaluate the illness degree.Results The life quality of autistic disorder group was lower than that of control group in the scores of physical functioning,emotional functioning,social functioning,mental domain and the totals cores of PedsQL,the differences were significant (all P <0.01).High-functioning autism in all aspects and the overall life quality were higher than those of low function group,the differences were statistically significant (all P <0.01).By using variance analysis,intelligence factors had an impact on the patient's life quality,the difference was statistically significant(P < 0.01).Correlation analysis results suggested that the autism condition degree was heavier,the intelligence level was lower,the life quality was worse,and the difference was statistically significant (P < 0.05).Conclusion Children with autistic disorder suffer grievous influence in life quality.
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Objective To observe the clinical curative effect of Annaohuoxue capsules, a prescription of promoting blood circulation and removing blood stasis, on patients with hypertensive cerebral hemorrhage and explore its safety. Methods Ninety-three patients with hypertensive cerebral hemorrhage,admitted to our hospital from June 2010 to November 201 i,were chosen and randomly divided into Arnaohuoxue capsule treatment group (group A,n=31),Tiandantongluo capsule treatment group (group B,n=32) and placebo control group (group C,n=30); After 7 d of onset,treatments were given,respectively,for 21 d.Hemorrheology,scores of neurological impairment,Glasgow coma scale (GCS) scores were recorded and compared in these groups before and after treatment. Results The plasma viscosity,and aggregation index of R BCs in patients from group A were significantly lower than those in patients from group B (P<0.05); statistically significant difference on the clinical efficacy was noted between each 2 groups (P<0.05):the outcome of group A was the best,that of group B was better,and that of group C was the worst.The GCS scores in patients from group A were significantly higher than those in patients from group B and group C (P<0.05) Conclusion Annaohuoxue capsules can improve the hemorrheology indices and neurological impairment,and decrease the GCS scores in varying degrees,and the treatment efficiency of Annaohuoxue capsules is much better than placebo.
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<p><b>OBJECTIVE</b>To validate and supplement the libraries of serial analysis of gene expression (SAGE) by the application of the real-time quantitative polymerase chain reaction PCR).</p><p><b>METHODS</b>The primers were designed based on the full sequences of the genes. Nine single matched tags, 6 multiple matched tags, 1 non-matched tag due to the update of the National Center for Biotechnology Information (NCBI) database, and 2 non-matched tags were selected to fulfill the validation of real-time PCR.</p><p><b>RESULTS</b>The genes were all specifically amplified by the primers pairs. The expressions of the single matched tags were identical to those of the SAGE libraries; however, the expressions of only 3 genes of the 6 multi-matched tags were identical to those of the SAGE libraries. The PCR data of the non-matched tag due to the update of the NCBI database were opposite to those of the SAGE libraries. The data did not support the significant difference of the non-matched gene of the SAGE libraries.</p><p><b>CONCLUSIONS</b>Real-time PCR is a reliable tool for the validation of high through-put data such as SAGE. The reliability of data depends on the match of the tags of the SAGE libraries.</p>
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Perfilación de la Expresión Génica , Métodos , Análisis de Secuencia por Matrices de Oligonucleótidos , Métodos , Reacción en Cadena en Tiempo Real de la PolimerasaRESUMEN
<p><b>OBJECTIVE</b>To study the effect of angiotensin II (Ang II) on pregnancy-associated plasma protein A (PAPP-A) and insulin-like growth factor 1 (IGF-1) mRNA expressions in human umbilical artery smooth muscle cells (HUVSMCs).</p><p><b>METHODS</b>In the presence or absence of Ox-LDL, HUVSMCs were cultured with Ang II of 10(-5) mol/L for 0, 6, 12, 24, 36, and 48 h, or with Ang II at the concentrations of 10(-7), 10(-6), 10(-5), and 10(-4) mol/L for 24 h, after which the cells were then collected to detect PAPP-A and IGF-1 mRNA expressions in the cells using RT-PCR.</p><p><b>RESULTS</b>At the concentration of 10(-5) mol/L, Ang II showed a time-dependent effect in inducing PAPP-A and IGF-1 mRNA expressions, which began to increase at 12 h of culture and reaching the highest level at 24 h. Ang II also dose-dependently induced PAPP-A and IGF-1 mRNA expressions, and 10(-5) mol/L Ang II induced the highest expression levels of the two genes. Ox-LDL exposure significantly further increased the expression levels of PAPP-A and IGF-1 mRNA in the cells regardless of the Ang II concentration or duration for cell treatment (P<0.05).</p><p><b>CONCLUSION</b>Ang II can time- and dose-dependently induces PAPP-A and IGF-1 mRNA expression in HUVSMCs and is responsible for inducing platelet activity and inflammatory reaction in acute coronary syndromes, and the effects of Ang II can be enhanced by Ox-LDL.</p>
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Humanos , Angiotensina II , Farmacología , Células Cultivadas , Sinergismo Farmacológico , Factor I del Crecimiento Similar a la Insulina , Genética , Metabolismo , Lipoproteínas LDL , Farmacología , Miocitos del Músculo Liso , Biología Celular , Metabolismo , Proteína Plasmática A Asociada al Embarazo , Genética , Metabolismo , ARN Mensajero , Genética , Metabolismo , Arterias Umbilicales , Biología Celular , MetabolismoRESUMEN
<p><b>OBJECTIVE</b>To screen differential expression genes and proteins at transcriptome and proteome levels between human gastric cancer tissue and corresponding normal mucosa.</p><p><b>METHODS</b>Fresh-frozen gastric cancers were collected from patients treated at Ruijin Hospital. A total of 22 pairs of gastric cancer tissues and the corresponding noncancerous mucosa were analyzed. Commercially available cDNA microarray with 14 592 genes/ESTs was used. Genes were considered to be up-or down-regulated when the intensity ratio Cy3/Cy5 was > or = 2 or < or = 0.5 in over 50% samples (P<0.05). Immobilized pH gradient(IPG)-based 2-DE was applied to separate the total proteins of gastric cancer tissue and paired normal tissue. After staining and analysis by software,the differential expression proteins were identified by matrix-assisted laser desorption/ionization-time of flight mass spectrometry (MALDI-TOF-MS) or MALDI-TOF-TOF-MS.</p><p><b>RESULTS</b>As compared with corresponding noncancerous tissue, there were totally 149 up-regulating genes/ESTs and 238 down-regulating genes/ESTs in gastric cancer, including 29 genes with 3-fold over-expression ratio and 21 genes with 5-fold under-expression. Fifteen protein spots were identified successfully, among whom there were ten over-expressed and five under-expressed proteins in gastric cancer tissue compared with normal tissue. Most of over-expressed genes and proteins were related to cell motility, cell proliferation, signal transduction, while those under-expressed genes and proteins were related to defense response, toxoid metabolism.</p><p><b>CONCLUSION</b>Studying gastric cancer at transcriptome and proteome levels can help demonstrate tumorigenesis and biological characteristics of gastric cancer comprehensively and provide powerful tools to find new biomarkers associated with gastric cancer and therapy targets.</p>
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Humanos , Electroforesis en Gel Bidimensional , Etiquetas de Secuencia Expresada , Perfilación de la Expresión Génica , Regulación Neoplásica de la Expresión Génica , Genes Relacionados con las Neoplasias , Genoma Humano , Proteínas de Neoplasias , Estadificación de Neoplasias , Análisis de Secuencia por Matrices de Oligonucleótidos , Proteoma , Metabolismo , Proteómica , Neoplasias Gástricas , Genética , Metabolismo , PatologíaRESUMEN
A series of polyketide-originated metabolites (1-5) were isolated from a marine sponge-derived fungus Mycelia sterilia. Of these, 1-3 were new compounds. Their structures were elucidated by spectroscopic methods as (4R*, 5S*, 6S*, 8S*, 13R*)-1-(2,8-dihydroxy-1,2,6-trimethyl-1,2,6,7,8,8a-hexahydro-naphthalen-1-yl)-3-methoxy-propan-1-one (1), 4,8-dihydroxy-7-(2-hydroxy-ethyl)-6-methoxy-3,4-dihydro-2H-naphthalen-1-one (2) and 1-methyl-naphthalene-2,6-dicarboxylic acid (3). In 1, the proton-proton long-range coupling phenomenon claimed attention and was discussed.
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Hongos/química , Espectroscopía de Resonancia Magnética/métodos , Naftalenos/química , Animales , Macrólidos/química , Poríferos/microbiología , EstereoisomerismoRESUMEN
Tubulin is the major protein of microtubule. alpha- and beta- tubulins form heterodimers, while gamma-tubulin regulates microtubule organization. The present study aimed to observe the dynamic changes of gamma-tubulin in preimplantation development of parthenogenetic mouse embryos. Immunofluorescence and laser confocal microscopy were used to detect the location of gamma-tubulin in preimplantation parthenogenetic embryos activated by SrCl2. The oocytes were collected at 13-14 h after hCG injection, and then activated with 10 mmol/L SrCl2 in Ca(2+)-free CZB medium with 5 mmol/L cytochalasin B (CB), fixed at 1 h intervals until 6 h after activation. The results showed that spindle was paralleled with the cell membrane all the time, when the meiosis of MII mouse oocytes resumed. The rotation of spindle was inhibited, but karyokinesis was not influenced. At 0 h after activation, i.e. at metaphase, gamma-tubulin was distributed mainly on the two poles of spindle. At 1 h after activation, i.e. at anaphase, following the separation of chromosomes, gamma-tubulin was transformed from dense to disperse. At 2 h after activation, gamma-tubulin was localized between the segregated sister chromatids at telophase. However, at 3-6 h after activation, gamma-tubulin concentrated around the two female pronuclei during their formation and juxtaposition. Moreover, another group of MII oocytes were activated for 6 h and cultured in droplets of KSOM medium under mineral oil in 5% CO2 in air at 37 degrees C to permit parthenogenetic development. The embryos were collected and fixed at 3 h, 14 h, 16 h, and 18 h of culture. At 3 h after culture, i.e. at mitotic interphase, it was shown that amorphous gamma-tubulin distributed around the nuclei of early parthenogenetic embryos. At 24 h after culture, i.e. at prometaphase, gamma-tubulin migrated along the spindle microtubule to the two poles. Our results showed that gamma-tubulin had similar location patterns at metaphase, anaphase and telophase in meiosis and mitosis. It was concluded that gamma-tubulin assembly in parthenogenetically activated oocytes facilitated the formation of negative pole cap and the stabilization of microtubule, thus promoting the spindle formation at meiosis and mitosis. The relocation of gamma-tubulin at anaphase and telophase might be induced by the event of segregation of homologous chromosome being pulled away by the spindle. gamma-tubulin might contribute to the migration and juxtaposition of the two female pronuclei as well.
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Animales , Femenino , Ratones , Embrión de Mamíferos , Desarrollo Embrionario , Meiosis , Mitosis , Oocitos , Biología Celular , Partenogénesis , Huso Acromático , Fisiología , Tubulina (Proteína) , FisiologíaRESUMEN
According to morphological and microscopic characteristics, a high-efficient decolorizing fungus, the strain Asaw117, was identified as Aspergillus awamori. Selecting eight different dyes from Azo dyes, anthraquinones dyes and oxygen Quinones dyes, the decolorizing assays of various dyes showed that the strain Asaw 117 was the highest decolorizing potential to 0.1 g/L Vat Blue RSN, the discoloration rate up to 100 percent. Comparing to different kinds of medium and several of carbon and nitrogen sources, the strain had the best decolorizing efficient although grew slower in the Czapek medium, otherwise, grew quicker and decolorizing efficient lower in the PDF medium. It could use Vat Blue RSN as a nitrogen source, but not as a carbon source. The medium composing of saccharose and ammonium nitrate as carbon and nitrogen sources was decolorizing potential markedly during different combinations of carbon and nitrogen sources. So the strain has good potential for the dyeing wastewater treatment
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<p><b>OBJECTIVE</b>To investigate relationship between the expression of hepatocyte growth factor(HGF) and lymphatic vessel formation in gastric cancer(GC), and to further clarify the possible ways of HGF promoting GC lymphangiogenesis and lymphatic metastasis.</p><p><b>METHODS</b>The expression of HGF, VEGF-C, c-Met and microlymphatic density(MLD) in tumor and non-tumor areas of 60 cases of GC and 20 cases of peptic ulcer (PU) were evaluated by immunohistochemistry. The relationships between MLD and clinicopathologic features of GC were analyzed.</p><p><b>RESULTS</b>The proteins of HGF, VEGF-C, and c-Met were overexpressed in GC tissues, which were significantly higher than those in normal gastric and PU tissues (P<0.001). The MLD of GC was also significant higher than those of normal gastric tissue and PU tissues (P<0.05). C-Met was expressed on enlarge lymphatic vessels in GC and PU tissues. MLD was positively correlated with the expression of HGF in GC (P<0.001).</p><p><b>CONCLUSION</b>HGF as well as VEGF-C is a lymphangiogenic factor in GC. HGF can directly or indirectly stimulate lymphangiogenesis and contribute to lymphatic metastasis in GC.</p>
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Adulto , Anciano , Anciano de 80 o más Años , Femenino , Humanos , Masculino , Persona de Mediana Edad , Factor de Crecimiento de Hepatocito , Metabolismo , Linfangiogénesis , Metástasis Linfática , Vasos Linfáticos , Patología , Proteínas Proto-Oncogénicas c-met , Metabolismo , Neoplasias Gástricas , Metabolismo , Patología , Factor C de Crecimiento Endotelial Vascular , MetabolismoRESUMEN
<p><b>OBJECTIVE</b>To explore the effect of hypoxia and hypoxia-inducible factor-1alpha (HIF-1alpha) on the expression of multidrug resistance gene-1 (mdr-1) and its coded p-glyeoprotein (P-gp) as well as the chemotherapeutic sensitivity of human ovarian cancer cells to paclitaxel and its mechanism.</p><p><b>METHODS</b>The mRNA and protein levels of HIF-1alpha, mdr-1 and p-gp were studied by immunocytochemistry, semiquantitative reverse transcription-ploymerase chain reaction (RT-PCR) and Western blot analysis in human ovarian cancer cells (A2780) in 5% CO2 + 1% O2 hypoxic culture and 21% O2 normoxic culture, respectively. Methyl thiazolyl tetrazolium (MIT) was used to evaluate the chemotherapeutic sensitivity of A2780 cells to paclitaxel by inhibition rate. RNA interference technique was used and small hairpin RNAs (shRNAs) eukaryotic expression vector targeting HIF-1alpha was constructed as pSiHIF-1alpha, and transfected into A2780 cells. RT-PCR and Western blot were used to detect gene silencing effect on HIF-1alpha, the expressions of mdr-1 and p-gp. The inhibition rate was observed after HIF-1alpha gene silence.</p><p><b>RESULTS</b>HIF-1alpha at both mRNA and protein levels was induced significantly under hypoxia. The HIF-1alpha expression at mRNA level was oxygen gradient-independent, while HIF-1alpha expression at protein level was oxygen gradient-dependent. The inhibition rate of paclitaxel to hypoxic A2780 cells in 5% CO2 + 1% O2 was significantly lower than that in normoxic A2780 cells (P <0.05). The shRNAs plasmid targeting HIF-1alpha was constructed successfully and HIF-1alpha gene was silenced in A2780 cells efficiently followed by mdr-1 and p-gp down-regulation. The inhibition rate was greatly increased in hypoxic A2780/siHIF-1alpha cells.</p><p><b>CONCLUSION</b>Hypoxia can decrease the chemotherapeutic sensitivity of human ovarian cancer A2780 cells to paclitaxel through HIF-1alpha regulating the expression of mdr-1 and p-gp.</p>