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1.
Front Psychol ; 13: 947012, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36110278

RESUMEN

With the assistance of the corpus analysis tool Wmatrix 4.0, this paper analyzes the semantic categories of the top 10 commercial banks of China and the United States to figure out their social-cultural behavior in the Internet business context. It is discovered that both common and distinctive identities were constructed: the common identities include the professional financial service provider, responsible corporation for employees, and relevant communities with environmental and social consciousness, while the distinctive identities are manifested in the communication strategy, style, and persuasion mode: (1) The Chinese Commercial Banks adopted the proactive strategy for corporate identity construction, are prone to take hierarchical and impersonal communication style, and more focused on the "credibility appeal" and "rational appeal" in persuasion mode; (2) the commercial banks of the United States are more reactive in the communication strategy, position themselves in short distance with the putative audience in communication style, and conform to the typical "affective appeal" regarding the persuasion mode. From the intercultural perspective, the distinctions are the representation of the peculiar high-context culture and low-context culture based on Hofstede's cultural dimensions theory. Chinese banks should try to shorten the cultural gap by adopting communication strategy in conformity with the local cultural when going global rather than sticking to the domestic communication strategy.

2.
J Healthc Eng ; 2022: 4082196, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35494518

RESUMEN

Aim: The aim of this study is to investigate the existing status and to explore the influencing factors of parents-reported readiness for hospital discharge in children with acute leukemia (AL) in China and to propose optimizing pathways and recommendations of discharge readiness for clinical reference. Methods: A cross-sectional survey was conducted for the 122 children with AL who were discharged from the Second Affiliated Hospital and Yuying Children's Hospital, Wenzhou Medical University; their parents were investigated by using the modified Chinese version of Readiness for Hospital Discharge Scale (RHDS) and Quality of Discharge Teaching Scale (QDTS). Data were collected between September 2020 and May 2021.Univariate analysis and multivariate logistic regression analysis were performed to explore the influencing factors of readiness for hospital discharge. Results: The 122 children with AL included 52 females and 70 males with mean age 6.08 years. The total RHDS score was 7.7 ± 1.2, and 68.9% of the participants had high readiness for hospital discharge (RHDS score >7). The total QDTS score was 7.6 ± 2.0. Parent marital status (OR = 4.86, 95% CI: 1.31-18.05), education status (OR = 3.86, 95% CI: 1.18-12.55), family per capita monthly income (OR = 1.08, 95% CI: 1.01-2.99), and high QDTS (OR = 1.56, 95% CI: 1.11-2.68) were risk factors for high RHDS. Conclusions: Our data suggest parents of children with AL had high readiness for hospital discharge and had the ability to take care of their children after discharge. Parental marital status, education status, QDTS score, and family per capita monthly income were independently associated with high RHDS.


Asunto(s)
Leucemia , Alta del Paciente , Niño , Estudios Transversales , Femenino , Hospitales , Humanos , Leucemia/terapia , Masculino , Padres/educación
3.
J Recept Signal Transduct Res ; 42(4): 409-417, 2022 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-34645355

RESUMEN

PURPOSE: Previous studies have proved that zingerone was a therapeutic agent for many tumors. Metadherin (MTDH) acts as an oncogene and is involved in tumorigenesis. The purpose of this study was to explore the underlying mechanism of zingerone that regulates MTDH to affect hepatocellular carcinoma (HCC) progression. METHODS: CCK-8 assay was performed to detect HCC cell proliferation. The invasion and migration abilities of HCC cells were evaluated using Transwell assay. The mRNA and protein levels in cells and tissues were measured using qRT-PCR and Western blot assays. Moreover, we established the HCC xenografts nude mice to evaluate the effect of zingerone on tumor growth. RESULTS: We found that zingerone treatment significantly inhibited HCC cell malignant phenotype and tumor growth. Moreover, MTDH was highly expressed in HCC tissues and cell lines and was positively associated with poor overall survival of patients with HCC. Knockdown of MTDH notably suppressed the proliferation, invasion, and migration capacities of HCC cells. Mechanistically, inhibition of MTDH by zingerone impeded the malignant biological behavior of HCC cells by inactivating the PI3K/Akt pathway. CONCLUSION: These results suggested that zingerone served as an effective therapeutic agent in HCC via blocking the MTDH-mediated PI3K/Akt pathway.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Animales , Carcinoma Hepatocelular/tratamiento farmacológico , Carcinoma Hepatocelular/genética , Moléculas de Adhesión Celular/genética , Moléculas de Adhesión Celular/metabolismo , Línea Celular , Línea Celular Tumoral , Movimiento Celular/genética , Proliferación Celular/genética , Guayacol/análogos & derivados , Humanos , Neoplasias Hepáticas/tratamiento farmacológico , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/metabolismo , Proteínas de la Membrana/genética , Proteínas de la Membrana/metabolismo , Ratones , Ratones Desnudos , Fosfatidilinositol 3-Quinasas/genética , Fosfatidilinositol 3-Quinasas/metabolismo , Proteínas Proto-Oncogénicas c-akt/genética , Proteínas Proto-Oncogénicas c-akt/metabolismo , Proteínas de Unión al ARN/genética , Proteínas de Unión al ARN/metabolismo , Transducción de Señal
4.
Front Cardiovasc Med ; 8: 639993, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34395549

RESUMEN

Aims: The aim of this study was to perform a meta-analysis of studies of the association of left ventricular hypertrophy (LVH) and atrial fibrillation (AF), especially the predictive and prognostic role of LVH. Methods and Results: We searched Medline, Embase, and the Cochrane Library from inception through 10 April 2020. A total of 16 cohorts (133,091 individuals) were included. Compared with the normal subjects, patients with LVH were more susceptible to AF (RR = 1.46, 95% CI, 1.32-1.60). In patients with AF and LVH, there was a higher risk of all-cause mortality during 3.95 years (RR = 1.60, 95% CI, 1.42-1.79), and these patients were more likely to progress to persistent or paroxysmal AF (RR = 1.45, 95% CI, 1.20-1.76) than were patients without LVH. After catheter ablation of AF, patients with LVH were more likely to recur (RR = 1.58, 95% CI, 1.27-1.95). Conclusion: LVH is strongly associated with AF and has a negative impact on outcome in patients with AF.

5.
Front Immunol ; 12: 652924, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33854512

RESUMEN

As many patients ultimately relapse after chimeric antigen receptor (CAR) T-cell therapy, identification of alternative targets is currently being evaluated. Substantial research efforts are underway to develop new targets. The transferrin receptor (TfR) is prevalently expressed on rapidly proliferating tumor cells and holds the potential to be the alternative target. In order to investigate the efficacy and challenges of TfR-targeting on the CAR-based therapy strategy, we generated a TfR-specific CAR and established the TfR-CAR-modified T cells. To take the advantage of TfR being widely shared by multiple tumors, TfR-CAR T cells were assessed against several TfR+ hematological malignant cell lines. Data showed that TfR-CAR T cells were powerfully potent in killing all these types of cells in vitro and in killing T-ALL cells in vivo. These findings suggest that TfR could be a universal target to broaden and improve the therapeutic efficacy of CAR T cells and warrant further efforts to use these cells as an alternative CAR T cell product for the therapy of hematological malignancies.


Asunto(s)
Inmunoterapia Adoptiva/métodos , Leucemia-Linfoma Linfoblástico de Células T Precursoras/terapia , Receptores Quiméricos de Antígenos/metabolismo , Receptores de Transferrina/metabolismo , Proteínas Recombinantes de Fusión/metabolismo , Animales , Línea Celular Tumoral , Femenino , Humanos , Fragmentos Fc de Inmunoglobulinas/genética , Fragmentos Fc de Inmunoglobulinas/farmacología , Ratones , Leucemia-Linfoma Linfoblástico de Células T Precursoras/inmunología , Leucemia-Linfoma Linfoblástico de Células T Precursoras/patología , Receptores Quiméricos de Antígenos/genética , Receptores de Transferrina/antagonistas & inhibidores , Proteínas Recombinantes de Fusión/genética , Proteínas Recombinantes de Fusión/farmacología , Ensayos Antitumor por Modelo de Xenoinjerto
6.
Int J Oncol ; 58(2): 280, 2021 02.
Artículo en Inglés | MEDLINE | ID: mdl-33491751

RESUMEN

Subsequently to the publication of the above article, an interested reader drew to the authors' attention that, in Fig. 1B on p. 1552, the MCF­7 and T24, and the A549 and ScaBER data panels, respectively, appeared to be strikingly similar. After having re­examined the original data, the authors have realized that these pairings of data panels were indeed duplicates of each other. Essentially, errors were made in the labelling of the data panels pertaining to the separate experiments, and in the compilation of the published version of Fig. 1. The authors, however, were willing to repeat the affected experiments, and obtained results that were consistent with those of the experiments that had been originally performed. Consequently, the revised version of Fig. 1 is shown below, showing the new data for Fig. 1B. The results from the flow cytometric analysis demonstrated the abnormally high expression level of TGF­ß receptor II in T24 cells. The authors confirm that these data support the main conclusions presented in their paper, and are grateful to the Editor of International Journal of Oncology for allowing them this opportunity to publish a Corrigendum. They also apologise to the readership for any inconvenience caused. [the original article was published in International Journal of Oncology 43: 1549­1559, 2013; DOI: 10.3892/ijo.2013.2065].

7.
Front Immunol ; 11: 584458, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-33133103

RESUMEN

The liver is an immunologically tolerant organ and a common site of distant metastasis for various cancers. The expression levels of glucose-regulated protein 78 (GRP78) have been associated with tumor malignancy. Secretory GRP78 (sGRP78) released from tumor cells contributes to the establishment of an immunosuppressive tumor microenvironment by regulating cytokine production in macrophages and dendritic cells (DCs). However, the role of sGRP78 on tumor cell colonization and metastasis in the liver remains unclear. Herein, we found that GRP78 was expressed at higher levels in the liver compared to other tissues and organs. We performed intravital imaging using a sGRP78-overexpressing breast cancer cell line (E0771) and found that sGRP78 interacted with dendritic cells (DCs) and F4/80+ macrophages in the liver. Importantly, sGRP78 overexpression inhibited DC activation and induced M2-like polarization in F4/80+ macrophages. Moreover, sGRP78 overexpression enhanced TGF-ß production in the liver. In conclusion, sGRP78 promotes tumor cell colonization in the liver by remodeling the tumor microenvironment and promoting immune tolerance. The ability of sGRP78-targeting strategies to prevent or treat liver metastasis should be further examined.


Asunto(s)
Proteínas de Choque Térmico/metabolismo , Hígado/metabolismo , Proteínas de Neoplasias/metabolismo , Microambiente Tumoral/fisiología , Animales , Neoplasias de la Mama/metabolismo , Neoplasias de la Mama/patología , Carcinoma/metabolismo , Carcinoma/patología , Línea Celular Tumoral , Células Dendríticas/metabolismo , Células Dendríticas/patología , Chaperón BiP del Retículo Endoplásmico , Femenino , Hígado/patología , Neoplasias Hepáticas/metabolismo , Neoplasias Hepáticas/patología , Macrófagos/metabolismo , Macrófagos/patología , Ratones , Ratones Endogámicos C57BL
8.
Am J Transl Res ; 12(7): 3780-3791, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32774734

RESUMEN

A high hepatitis B virus (HBV) load and chronic hepatitis B infection are well-recognized risk factors for the development of hepatocellular carcinoma (HCC), highlighting the need for research into the mechanisms underlying the role of HBV infection in HCC. Because phosphatase and tensin homolog (PTEN) has been implicated in HCC development, we explored whether PTEN has a role in HBV-related hepatocarcinogenesis. We found that PTEN expression was correlated with advanced clinicopathological features and that HBV infection exacerbates PTEN defects in HCC. Using an integrated approach, we then investigated if miRNAs linked HBV infection to PTEN downregulation in HCC and found that PTEN was a target of miR-181a/382/362/19a. We also show that miR-181a/382/362/19a-mediated inhibition of PTEN led to an enhanced malignant phenotype and stimulation of AKT signaling in HCC cells. Collectively, our results indicate that HBV infection exacerbates PTEN defects in hepatocellular carcinoma through upregulation of miR-181a/362/382/19a. Our work implicates miR-181a/362/382/19a and PTEN as potential biomarkers and targets for novel prognostic, diagnostic, and therapeutic strategies targeting HBV-related HCC.

9.
Nanotheranostics ; 4(3): 119-128, 2020.
Artículo en Inglés | MEDLINE | ID: mdl-32328439

RESUMEN

Rational: Many efforts have been made to develop ligand-directed nanotheranostics in cancer management which could afford both therapeutic and diagnostic functions as well as tumor-tailored targeting. Theranostic nanoplatform targeting transferrin receptor (TfR) is an effective system for favorable delivery of diagnostic and therapeutic agents to malignancy site. Methods: To enable amalgamation of therapy and diagnosis to many TfR+ tumor, hTfR (human TfR) monoclonal antibody (mAb)-functionalized HPPS nanoparticle (HPPS-mAb) was prepared with hTfR mAb on the shell and with fluorophore DiR-BOA in the core. The targeting specificity was investigated in vitro by immunostaining and in vivo using a double-tumor-engrafted mouse model. HPPS-mAb/siRNA effect on HepG2 cells was determined by RT-PCR and western blot. Results: HPPS-mAb could specifically target cancer cells through TfR and achieve tumor accumulation at an early valuable time node, thus efficiently delivering therapeutic survivin siRNA into TfR+ HepG2 cells and mediating cell apoptosis. DiR-BOA can act as an imaging tool to diagnose cancer. Conclusions: Our studies provide a promising TfR mAb-directed theranostic nanoplatform candidate in tumor molecular imaging and in TfR targeted tumor therapy.


Asunto(s)
Anticuerpos Monoclonales , Sistemas de Liberación de Medicamentos/métodos , Nanopartículas , Receptores de Transferrina , Nanomedicina Teranóstica/métodos , Animales , Anticuerpos Monoclonales/química , Anticuerpos Monoclonales/metabolismo , Anticuerpos Monoclonales/farmacología , Apoptosis/efectos de los fármacos , Femenino , Células HeLa , Células Hep G2 , Humanos , Ratones , Ratones Endogámicos BALB C , Ratones Desnudos , Nanopartículas/química , Nanopartículas/metabolismo , Fosfolípidos/química , Receptores de Transferrina/química , Receptores de Transferrina/metabolismo
10.
Curr Med Sci ; 40(1): 28-34, 2020 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-32166662

RESUMEN

Selecting an ideal molecular format from diverse structures is a major challenge in developing a bispecific antibody (BsAb). To choose an ideal format of anti-CD3 × anti-transferrin receptor (TfR) bispecific antibodies for clinical application, we constructed TfR bispecific T-cell engager (BiTE) in two extensively applied formats, including single-chain tandem single-chain variable fragments (scFvs) and double-chain diabodies, and evaluated their functional characterizations in vitro. Results demonstrated that TfR-BiTE in both formats directed potent killing of TfR+ HepG2 cells. However, compared to two-chain diabodies, scFvs were more efficient in antigen binding and TfR+ target killing. Furthermore, different domain orders in scFvs would also be evaluated because single-TfR-CD3-His was preferable to single-CD3-TfR-His in immunotherapeutic strategies. Thus, the single-chain tandem TfR-CD3 format was favored for further investigation in cancer therapy.


Asunto(s)
Anticuerpos Biespecíficos/farmacología , Antineoplásicos Inmunológicos/farmacología , Complejo CD3/inmunología , Receptores de Transferrina/inmunología , Células A549 , Anticuerpos Biespecíficos/genética , Proliferación Celular/efectos de los fármacos , Supervivencia Celular/efectos de los fármacos , Células HEK293 , Células Hep G2 , Humanos , Anticuerpos de Cadena Única/inmunología
11.
J Integr Plant Biol ; 62(7): 887-896, 2020 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-31755194

RESUMEN

Oscillations in cytosolic free calcium determine the polarity of tip-growing root hairs. The Ca2+ channel cyclic nucleotide gated channel 14 (CNGC14) contributes to the dynamic changes in Ca2+ concentration gradient at the root hair tip. However, the mechanisms that regulate CNGC14 are unknown. In this study, we detected a direct interaction between calmodulin 7 (CaM7) and CNGC14 through yeast two-hybrid and bimolecular fluorescence complementation assays. We demonstrated that the third EF-hand domain of CaM7 specifically interacts with the cytosolic C-terminal domain of CNGC14. A two-electrode voltage clamp assay showed that CaM7 completely inhibits CNGC14-mediated Ca2+ influx, suggesting that CaM7 negatively regulates CNGC14-mediated calcium signaling. Furthermore, CaM7 overexpressing lines phenocopy the short root hair phenotype of a cngc14 mutant and this phenotype is insensitive to changes in external Ca2+ concentrations. We, thus, identified CaM7-CNGC14 as a novel interacting module that regulates polar growth in root hairs by controlling the tip-focused Ca2+ signal.


Asunto(s)
Proteínas de Arabidopsis/metabolismo , Arabidopsis/crecimiento & desarrollo , Arabidopsis/metabolismo , Calmodulina/metabolismo , Canales Catiónicos Regulados por Nucleótidos Cíclicos/metabolismo , Raíces de Plantas/crecimiento & desarrollo , Raíces de Plantas/metabolismo , Proteínas de Arabidopsis/química , Proteínas de Arabidopsis/genética , Calcio/farmacología , Señalización del Calcio/efectos de los fármacos , Calmodulina/química , Calmodulina/genética , Canales Catiónicos Regulados por Nucleótidos Cíclicos/química , Canales Catiónicos Regulados por Nucleótidos Cíclicos/genética , Motivos EF Hand , Modelos Biológicos , Fenotipo , Plantas Modificadas Genéticamente , Unión Proteica
12.
Front Plant Sci ; 10: 1090, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31572412

RESUMEN

The Arabidopsis cyclic nucleotide-gated channel (CNGC) family consists of 20 members, which have been reported to participate in various physiological processes, such as pathogen defense, development, and thermotolerance. Although CNGC11 and CNGC12 have been identified a decade ago and their role in programmed cell death is well studied, their precise channel regulation has not been studied electrophysiologically. Here, we determined the channel activities of CNGC11 and CNGC12 utilizing the two-electrode voltage-clamp technique in the Xenopus laevis oocyte heterologous expression system. Our results suggest that CNGC12 but not CNGC11 functions as an active calcium channel. Furthermore, the cyclic nucleotide monophosphates (cNMPs) did not affect the activities of CNGC11 nor CNGC12 in Xenopus oocytes. Interestingly, while the activity of CNGC11 was not affected by co-expression with calmodulin (CaM), the activity of CNGC12 was significantly enhanced when CaM1 was co-expressed in oocytes. This study reveals that the channel activities and the mechanisms of regulation by CaM are different between CNGC11 and CNGC12.

13.
Front Immunol ; 10: 1396, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31293575

RESUMEN

Bispecific T-cell engager antibodies (BiTE) have been explored as a means to recruit cytolytic T cells to kill tumor cells. The transferrin receptor (TfR) is highly expressed on the surface of rapidly proliferating tumor cells. Therefore, it holds great potential in T cell redirecting therapies. In this research, we developed a BiTE targeting TfR and CD3 (TfR-BiTE) and studied its therapeutic impact on TfR-positive cancer. TfR-BiTE had the ability to induce the selective lysis of various TfR-positive cancer cells through the activation of T cells, the release of cytokines, and then the coming proliferation of T cells, whereas TfR-negative cells were not affected. In a subcutaneous HepG2 xenograft model, low concentrations of TfR-BiTE inhibited tumor growth. Overall, these results reveal that TfR-BiTE can selectively deplete TfR-positive HepG2 cells; hence, it represents a novel immunotherapeutic approach for the treatment of hepatocellular carcinoma.


Asunto(s)
Anticuerpos Biespecíficos/farmacología , Complejo CD3/antagonistas & inhibidores , Inmunoterapia/métodos , Neoplasias Experimentales/inmunología , Receptores de Transferrina/antagonistas & inhibidores , Linfocitos T Citotóxicos/inmunología , Animales , Células Hep G2 , Humanos , Activación de Linfocitos/inmunología , Ratones , Linfocitos T Citotóxicos/efectos de los fármacos , Ensayos Antitumor por Modelo de Xenoinjerto
14.
BMC Cancer ; 19(1): 685, 2019 Jul 12.
Artículo en Inglés | MEDLINE | ID: mdl-31299935

RESUMEN

BACKGROUND: Sterol-regulatory element binding protein 1 (SREBP1), an intracellular cholesterol sensor located in the endoplasmic reticulum, regulates the intracellular cholesterol by the Insig-Srebp-Scap pathway. Over-expression of SREBP1 can cause dyslipidemia. SREBP1 can regulate the metabolic pathway, and then promote the proliferation of tumor cells. However, there is no relevant research of metastasis and invasion in the field of colorectal cancer (CRC). METHODS: Expression of SREBP1 was manipulated in CRC cell lines with low and high level SREBP1 expression by transfectiong with plasmids containing the SREBP1 gene, or by shRNA. The effect of SREBP1 on cell migration was assayed. The expression of SREBP1, p65 and MMP7 were detected by western blot. Human umbilical vein endothelial cell was used for detection of angiogenesis by adding the culture supernatant from HT29 and SW620. The level of reactive oxygen species (ROS) was detected by Dihydroethidium (DHE) staining. NF-κB inhibitor SN50 was used to test the relationship of SREBP1, NF-κB pathway and MMP7. RESULTS: We found that the expression of SREBP1 in colon adenocarcinoma was significantly higher than that in noncancerous tissues, especially in the invasive tumor front including tumor budding. In vitro, SREBP1 over-expressed in colon cancer cell lines HT29 promoted angiogenesis in endothelial cells, increased ROS levels, phosphorylation of NF-κB-p65 and increases MMP7 expression. The effect of SREBP1 on expression of MMP7 was lost following treatment with the NF-κB inhibitor SN50. CONCLUSION: Our results suggest that SREBP1 can promote the invasion and metastasis of CRC cells by means of promoting the expression of MMP7 related to phosphorylation of p65.


Asunto(s)
Neoplasias Colorrectales/genética , Neoplasias Colorrectales/metabolismo , Regulación Neoplásica de la Expresión Génica , Metaloproteinasa 7 de la Matriz/genética , FN-kappa B/metabolismo , Transducción de Señal , Proteína 1 de Unión a los Elementos Reguladores de Esteroles/genética , Adulto , Anciano , Línea Celular Tumoral , Movimiento Celular , Neoplasias Colorrectales/patología , Femenino , Humanos , Masculino , Persona de Mediana Edad , Clasificación del Tumor , Estadificación de Neoplasias , Neovascularización Patológica/genética , Neovascularización Patológica/metabolismo , Fosforilación , Especies Reactivas de Oxígeno/metabolismo
15.
Int J Clin Exp Pathol ; 12(3): 1095-1100, 2019.
Artículo en Inglés | MEDLINE | ID: mdl-31933924

RESUMEN

BACKGROUND: The role of lipid metabolism played in cancer cell growth attracts more attention. SREBP1 is a common lipid regulatory factor. It has been reported that SREBP1 can promote tumor cell resistance. The aim of this study was to investigate its role in chemoresistance of colorectal cancer (CRC). METHODS: The expression of SREBP1 in CRC tissues was analyzed by immunohistochemistry. Using a viability assay, the sensitivity to 5-fluorouracil in two colon cancer cell lines (HT-29 and SW620) was measured and its correlation with different expression levels of SREBP1 protein by western blot was investigated. RESULTS: The protein expression of SREBP1 in CRC tissues was higher than that in normal colon tissues. We found that over-expression of SREBP1 through SREBP1 gene transfection enhances the resistant of CRC cell lines to 5-FU, and SREBP1 silencing through SREBP1 shRNA transfection can promote apoptosis in 5-FU treated SW620 cells. Further study indicated that SREBP1 could inhibit the expression of caspase7 and reduce PARP1 cleavage fragments. CONCLUSION: Our results suggest that SREBP1 protect the 5-FU treated CRC cells through caspase7 dependent PARP1 cleavage in apoptosis pathway and potentially provide a new target in the treatment of CRC.

16.
J Glob Antimicrob Resist ; 16: 262-265, 2019 03.
Artículo en Inglés | MEDLINE | ID: mdl-30339895

RESUMEN

OBJECTIVES: Vancomycin resistance in Enterococcus spp., mediated mainly by the vanA resistance gene, has become a major health concern as it has spread worldwide. Therefore, a rapid method is urgently required to detect the vanA gene for timely and appropriate antimicrobial control of resistant Enterococcus infections. METHODS: The loop-mediated isothermal amplification (LAMP) assay was optimised for vanA detection in Enterococcus spp. isolates. RESULTS: The LAMP primer set designed in this study could reliably recognise seven distinct regions of the vanA gene and amplify the gene within 25min at an isothermal temperature of 65°C with high specificity. The sensitivity of the optimised assay was high, with a detection limit for vanA as low as 100pg/µL, which is 100-fold more sensitive than the PCR assay. A special advantage of this optimised LAMP method is that the vanA gene could be detected directly from clinical specimens. CONCLUSION: This optimised LAMP assay has great application potential for efficient detection of vanA in clinical diagnosis and epidemiological studies.


Asunto(s)
Antibacterianos/farmacología , Proteínas Bacterianas/genética , Ligasas de Carbono-Oxígeno/genética , Enterococcus faecalis/efectos de los fármacos , Enterococcus faecalis/genética , Enterococcus faecium/efectos de los fármacos , Enterococcus faecium/genética , Técnicas de Amplificación de Ácido Nucleico , Adolescente , Adulto , Enterococcus faecalis/aislamiento & purificación , Enterococcus faecium/aislamiento & purificación , Femenino , Humanos , Masculino , Pruebas de Sensibilidad Microbiana , Persona de Mediana Edad , Sensibilidad y Especificidad , Temperatura , Resistencia a la Vancomicina/genética , Adulto Joven
17.
Oncotarget ; 9(47): 28309-28321, 2018 Jun 19.
Artículo en Inglés | MEDLINE | ID: mdl-29983862

RESUMEN

Chronic infection with hepatitis B virus (HBV) is one of the major risk factors for hepatocellular carcinoma. HBV infection can induce the expression of IL-23. However, the effects of IL-23 on carcinogenesis are rare and contradictory. To investigate the potential role of IL-23 on malignant properties of hepatoma cells, in the present study, first, we confirmed that HBV drove infected hepatoma cells to produce more IL-23. And then we found that at low concentration, human recombinant IL-23 (hrIL-23) enhanced malignant properties of hepatoma cells through increasing the proportion of stem/progenitor cells, promoting proliferation and colony formation, reducing apoptosis and inducing motility and invasivity of them. Hepatocyte nuclear factor 4 alpha (HNF4α), which is essential for liver development and hepatocyte function, was found to be downregulated in HBV integrated or transiently transfected hepatoma cells. Its expression was also decreased in cells treated by hrIL-23 or by HepG2.215 culture supernatant and this decrease could be abolished by supplementation of anti-IL-23p19 antibody. Hence, it is speculated that HBV related IL-23 can enhance malignant properties of hepatoma cells through attenuation of HNF4α. The findings identified a potential target of interventional strategies for treating hepatitis B patients through manipulation of the IL-23.

18.
Sci China Life Sci ; 61(1): 100-112, 2018 01.
Artículo en Inglés | MEDLINE | ID: mdl-28795376

RESUMEN

The pollen receptor kinases (PRK) are critical regulators of pollen tube growth. The Arabidopsis genome encodes eight PRK genes, of which six are highly expressed in pollen tubes. The potential functions of AtPRK1 through AtPRK5, but not of AtPRK6, in pollen growth were analyzed in tobacco. Herein, AtPRK6 was cloned, and its function was identified. AtPRK6 was expressed specifically in pollen tubes. A yeast two-hybrid screen of AtPRK6 against 14 Arabidopsis Rop guanine nucleotide exchange factors (RopGEFs) showed that AtPRK6 interacted with AtRopGEF8 and AtRopGEF12. These interactions were confirmed in Arabidopsis mesophyll protoplasts. The interactions between AtPRK6 and AtRopGEF8/12 were mediated by the C-termini of AtRopGEF8/12 and by the juxtamembrane and kinase domain of AtPRK6, but were not dependent on the kinase activity. In addition, transient overexpression of AtPRK6::GFP in Arabidopsis protoplasts revealed that AtPRK6 was localized to the plasma membrane. Tobacco pollen tubes overexpressing AtPRK6 exhibited shorter tubes with enlarged tips. This depolarized tube growth required the kinase domain of AtPRK6 and was not dependent on kinase activity. Taken together, the results show that AtPRK6, through its juxtamembrane and kinase domains (KD), interacts with AtRopGEF8/12 and plays crucial roles in polarized growth of pollen tubes.


Asunto(s)
Proteínas de Arabidopsis/genética , Proteínas de Arabidopsis/metabolismo , Arabidopsis/genética , Factores de Intercambio de Guanina Nucleótido/metabolismo , Tubo Polínico/crecimiento & desarrollo , Tubo Polínico/genética , Proteínas Serina-Treonina Quinasas/genética , Proteínas Serina-Treonina Quinasas/metabolismo , Proteínas de Arabidopsis/química , Sitios de Unión , Regulación de la Expresión Génica de las Plantas , Factores de Intercambio de Guanina Nucleótido/química , Proteínas de la Membrana/genética , Proteínas de la Membrana/metabolismo , Modelos Biológicos , Unión Proteica , Proteínas Serina-Treonina Quinasas/química , Nicotiana/genética
19.
J Huazhong Univ Sci Technolog Med Sci ; 37(5): 699-704, 2017 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-29058282

RESUMEN

To investigate the role of signaling pathway in the effect of endoplasmic reticulum stress (ER stress) in endothelial cells stimulated with cigarette smoke extract (CSE). Human umbilical vein endothelial cells (HUVECs) were cultured and divided into 3 groups: CSE-stimulated group, CSE-stimulated with 4-PBA group, and negative control group. HUVECs were cultured and stimulated with CSE at concentrations of 5%, 10% and 20%, respectively, mRNA of CXCL-8 and GRP78 was detected by real-time PCR. ELISA was performed to test the expression of CXCL-8 protein, and neutrophils migration was detected by Transwell board test. The NF-κB, ERK, p38MAPK and transforming growth factor beta (TGF-ß) were detected by flow cytometry. The mRNA of CXCL-8 and GRP78 increased in CSE-stimulated HUVECs (P<0.05). Furthermore, it was concentration-dependent. 4-PBA significantly reduced the expression of CXCL-8 protein (P<0.05) and neutrophil migration (P<0.05). The TGF-ß, rather than the NF-κB, ERK and P38MAPK pathway might be involved in ER stress stimulated by CSE. CSE induced neutrophils migration by increasing the expression of CXCL-8 in endothelial cells. ER stress might play a role in the effect of neutrophils migration stimulated with CSE, and TGF-ß pathway may contribute to the ER stress in HUVECs.


Asunto(s)
Estrés del Retículo Endoplásmico/efectos de los fármacos , Retículo Endoplásmico/genética , Células Endoteliales/efectos de los fármacos , Transducción de Señal/efectos de los fármacos , Humo/efectos adversos , Retículo Endoplásmico/efectos de los fármacos , Retículo Endoplásmico/metabolismo , Chaperón BiP del Retículo Endoplásmico , Células Endoteliales/metabolismo , Regulación de la Expresión Génica/efectos de los fármacos , Proteínas de Choque Térmico/genética , Proteínas de Choque Térmico/metabolismo , Células Endoteliales de la Vena Umbilical Humana , Humanos , Interleucina-8/genética , Interleucina-8/metabolismo , Nicotiana , Factor de Crecimiento Transformador beta/genética , Factor de Crecimiento Transformador beta/metabolismo
20.
Front Immunol ; 8: 579, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28588578

RESUMEN

The 78-kDa glucose-regulated protein (GRP78) is a stress-inducible chaperone that resides primarily in the endoplasmic reticulum. GRP78 has been described to be released at times of cellular stress and as having extracellular properties that are anti-inflammatory or favor the resolution of inflammation. In the current study, we confirmed that GRP78 impaired the production of lipopolysaccharide-induced pro-inflammatory cytokines in GRP78-treated bone-marrow-derived dendritic cells (DCs). To explore the underlying mechanism, first of all, GRP78 was checked to be bound to the plasma membrane. Interestingly, such binding promoted endocytosis of toll-like receptor (TLR) 4 and reduction in TLR4 on the plasma surface had a key role in desensitization of GRP78-treated DCs to lipopolysaccharide. Given that cluster of differentiation (CD)14 is a crucial regulator of TLR4 endocytosis, interaction of GRP78 with CD14 was investigated next. Data showed that GRP78 co-localized with CD14 on the plasma membrane and glutathione-S-transferase-GRP78 precipitated CD14. In CD14 knockout mice, down-regulation of tumor necrosis factor-α and reduction in TLR4 on the plasma surface were abrogated in GRP78-treated DCs. Overall, these data suggested that GRP78 mediates endocytosis of TLR4 by targeting CD14 to favor the resolution of inflammation.

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