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1.
Knee Surg Sports Traumatol Arthrosc ; 30(6): 2158-2165, 2022 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-35099599

RESUMO

PURPOSE: The purpose of this study is to compare absorbable suture anchor with knotless anchor techniques for arthroscopic anterior talofibular ligament (ATFL) repair. METHOD: A multicenter retrospective study was performed with 185 patients, who had undergone an arthroscopic ATFL repair procedure using absorbable suture anchor or knotless anchor between May 2017 and October 2019. The follow-up time was a minimum of 18 months. Karlsson-Peterson score, visual analogue scale (VAS), and Cumberland ankle instability tool (CAIT) were evaluated. The complications were also recorded. RESULTS: One hundred and seven patients underwent one absorbable suture anchor repair procedure (Group A [A]), and the other seventy-eight patients underwent one knotless anchor repair procedure (Group B [B]). At the final follow-up, both Karlsson-Peterson score (A, pre 61.0 ± 8.0 vs post 93.5 ± 5.3, P < 0.001; B, pre 59.5 ± 8.2 vs post 92.4 ± 6.3, P < 0.001), VAS score (A, pre 5.0 ± 1.3 vs post 0.5 ± 0.7, P < 0.001; B, pre 5.5 ± 1.2 vs post 0.9 ± 1.0, P < 0.001), and CAIT score (A, pre 53.1 ± 12.0 vs post 93.1 ± 6.6, P < 0.001; B, pre 51.6 ± 12.0 vs post 93.1 ± 6.5, P < 0.001) improved significantly in both groups. There was no significant difference between the two groups regarding the Karlsson-Peterson score (A, pre 61.0 ± 8.0 vs B, pre 59.5 ± 8.2, n.s; A, post 93.5 ± 5.3 vs B, post 92.4 ± 6.3, n.s), CAIT score (A, pre 53.1 ± 12.0 vs B, pre 51.6 ± 12.0, n.s; A, post 93.1 ± 6.6 vs B, post 93.1 ± 6.5, n.s) and the change ranges of VAS (A, 4.5 ± 1.0 vs B, 4.6 ± 1.2, n.s). Anchor complications were easier to occur in Group B (0/107 vs 6/78, P = 0.007). Knot irritation slightly increased in Group A (10/107 vs 0/78, P = 0.006). No significant difference was found regarding total complication rates (A, 10/107 vs B, 6/78, n.s). CONCLUSION: Absorbable suture anchor and knotless anchor for arthroscopic ATFL repair produced similar clinical outcomes. The ankle stability scores increased significantly in both groups. However, the knotless anchor has a higher risk to loosen, deviated direction or break, while the absorbable suture anchor still has a slim chance of knot irritation. LEVEL OF EVIDENCE: III.


Assuntos
Instabilidade Articular , Ligamentos Laterais do Tornozelo , Articulação do Tornozelo/cirurgia , Artroscopia/métodos , Humanos , Instabilidade Articular/cirurgia , Ligamentos Laterais do Tornozelo/cirurgia , Estudos Retrospectivos , Âncoras de Sutura , Técnicas de Sutura
2.
J Cell Mol Med ; 24(24): 14415-14425, 2020 12.
Artigo em Inglês | MEDLINE | ID: mdl-33155430

RESUMO

Mini-chromosome maintenance (MCM) proteins play important roles in initiating eukaryotic genome replication. The MCM family of proteins includes several members associated with the development and progression of certain cancers. We performed online data mining to assess the expression of MCMs in gastric cancer (GC) and the correlation between their expression and survival in patients with GC. Notably, MCM8 expression was undoubtedly up-regulated in GC, and higher expression correlated with shorter overall survival (OS) and progression-free survival (PFS) in patients with GC. However, the role of MCM8 in GC has not been previously explored. Our in vitro experiments revealed that MCM8 knockdown inhibited cell growth and metastasis. Moreover, MCM8 knockdown induced apoptosis. Mechanistically, the expression levels of Bax and cleaved caspase-3 were increased, whereas Bcl-2 expression decreased. Additionally, we demonstrated that MCM8 knockdown suppressed tumorigenesis in vivo. Overall, these results suggest that MCM8 plays a significant role in GC progression.


Assuntos
Apoptose/genética , Biomarcadores Tumorais , Proteínas de Manutenção de Minicromossomo/genética , Neoplasias Gástricas/genética , Neoplasias Gástricas/mortalidade , Animais , Ciclo Celular/genética , Linhagem Celular Tumoral , Proliferação de Células , Transformação Celular Neoplásica/genética , Modelos Animais de Doenças , Feminino , Expressão Gênica , Perfilação da Expressão Gênica , Técnicas de Silenciamento de Genes , Xenoenxertos , Humanos , Camundongos , Proteínas de Manutenção de Minicromossomo/metabolismo , Prognóstico , Neoplasias Gástricas/diagnóstico , Neoplasias Gástricas/metabolismo , Análise de Sobrevida
3.
Biochem Biophys Res Commun ; 504(2): 525-531, 2018 10 02.
Artigo em Inglês | MEDLINE | ID: mdl-30201265

RESUMO

Nasal-type natural killer/T-cell lymphoma (NKTCL) is a subtype of non-Hodgkin lymphoma (NHL) that is clinically aggressive and has a poor prognosis. Platelet-derived growth factor receptors (PDGFRs) and their ligands (PDGFs) play important roles in angiogenesis, cancer cell proliferation, survival, migration and poor prognosis in various tumours. However, the significance of PDGFRs in NKTCL remains unknown. Herein, the present study aimed to investigate the important role of PDGFRα in pathogenesis, progression and prognisis of NKTCL. Firstly, we performed immunohistochemical staining, qRT-PCR and western blotting to determine PDGFRα expression in formalin-fixed, paraffin-embedded tissue sections from 78 NKTCL cases and in cell lines. Secondly, correlations between PDGFRα expression and NKTCL clinical parameters and prognosis were analysed. Moreover, a biological assessment of PDGFRα blockade in two NKTCL cell lines was conducted through proliferation assay, cell-cycle evaluation and apoptosis detection by flow cytometry analyses. Furthermore, we detected in vivo activity of imatinib in mouse model of NKTCL. We found that the expression of PDGFRα was significantly higher in NKTCL tissues compared to the reactive lymphoid hyperplasia of the nasopharynx (P = 0.028). High PDGFRα expression was strongly associated with a high LDH level (P = 0.028) and III-IV stage (P = 0.013). NKTCL patients with high PDGFRα expression displayed a reduced median overall survival time and progression-free survival time when compared with those with low PDGFRα expression (P = 0.011, P = 0.005, respectively). Cox multivariate analysis showed that III-IV stage (P = 0.024) and high PDGFRα expression (P = 0.003) were independent prognostic factors in NKTCL patients. Biological assessment assays in two NKTCL cell lines revealed that a specific PDGFR antagonist, imatinib, inhibited cell viability, blocked cell cycle progression at G0/G1 stage and induced apoptosis. Similarly, the in vivo assay showed that imatinib delayed mouse model tumour growth. In conclusion, NKTCL tumour cells have prominent PDGFRα expression, which can serve as a candidate prognostic marker. PDGFR antagonists have significant biological effect on NKTCL and may be useful therapeutic agents for treatment of NKTCL.


Assuntos
Linfoma Extranodal de Células T-NK/metabolismo , Receptor alfa de Fator de Crescimento Derivado de Plaquetas/metabolismo , Adulto , Idoso , Animais , Apoptose , Linhagem Celular Tumoral , Proliferação de Células , Sobrevivência Celular , Feminino , Humanos , Mesilato de Imatinib/farmacologia , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Pessoa de Meia-Idade , Transplante de Neoplasias , Prognóstico , Regulação para Cima
4.
Tumour Biol ; 37(5): 6881-91, 2016 May.
Artigo em Inglês | MEDLINE | ID: mdl-26662569

RESUMO

The aim was to investigate the function of fibroblast growth factor receptor 4 (FGFR4) in gastric cancer (GC) and explore the treatment value of agent targeted to FGFR4. Function assays in vitro and in vivo were performed to investigate the discrepancy of biological features among the GC cells with different expression of FGFR4. GC cells were treated with the single and combination of PD173074 (PD, an inhibitor of FGFR4) and 5-fluorouracil (5-Fu). The invasion ability were stronger, and the apoptosis rates were lower in MGC803 and BGC823 cells treated with FGFR4-LV5 (over-expression of FGFR4 protein) (P < 0.05). The proliferation ability of GC cells is reduced when treated by the single and combination of 5-Fu and PD while that of the FGFR4-LV5 group was less inhibited compared with control group (P < 0.05). The apoptosis rates are remarkably increased in GC cells treated with the single and combination of 5-Fu and PD (P < 0.05). However, the apoptosis rate obviously is reduced in GC cells treated with FGFR4-LV5 compared with control group (P < 0.05). The expression of PCNA and Bcl-XL is remarkably decreased, and the expression of Caspase-3 and cleaved Caspase-3 is obviously increased in GC cells treated with the single and combination of 5-Fu and PD. The tumor volumes of nude mice in FGFR4-LV5 group were much more increased (P < 0.05). The over-expression of FGFR4 enhanced the proliferation ability of GC in vitro and in vivo. The combination of 5-Fu and PD exerted synergetic effect in weakening the proliferation ability and promoting apoptosis in GC cells, while the over-expression of FGFR4 might inhibit the efficacy of two drugs.


Assuntos
Fluoruracila/farmacologia , Expressão Gênica , Pirimidinas/farmacologia , Receptor Tipo 4 de Fator de Crescimento de Fibroblastos/genética , Neoplasias Gástricas/genética , Animais , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Sobrevivência Celular/efeitos dos fármacos , Modelos Animais de Doenças , Humanos , Masculino , Camundongos , Neoplasias Gástricas/patologia , Ensaios Antitumorais Modelo de Xenoenxerto
6.
Ann Hematol ; 94(6): 963-7, 2015 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-25547320

RESUMO

Evaluation of bone marrow involvement (BMI) by conventional bone marrow biopsy (BMB) can generate false-negative results if marrow disease is focal. The sensitivity of 18F-2-fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography (FDG-PET/CT) in assessing BMI in extranodal NK/T cell lymphoma (ENKL) has not been determined. We retrospectively collected clinical data from a series of 55 patients with newly diagnosed ENKL, who have received both FDG-PET/CT and BMB prior to treatment. BMB results were used as reference standard. Twelve patients (21.8 %) were considered positive lymphomatous infiltration by FDG-PET/CT (PET-CT/BM+), and five patients (9 %) were identified positive by BMB (BMB/BM+). There was a discordant result in seven patients who were PET-CT/BM+ but BMB/BM-. The sensitivity and specificity of FDG-PET/CT for identifying BMI were 100 and 86 %, respectively. Then, we analyzed the overall survival (OS) and progression-free survival (PFS) of patients who were PET-CT/BM+ and PET-CT/BM-. The median follow-up time was 16 months (range, 3 to 43 months). PET-CT/BM+ patients possessed worse 2-year OS than PET-CT/BM- patients (84.8 vs 67.9 %, P < 0.05). The estimated 2-year PFS for PET-CT/BM- and PET-CT/BM+ patients were 72.7 and 41.9 % (P < 0.05), respectively. However, it was hard to conclude that patients who were PET-CT/BM+ had similar survivals to advanced-stage patients due to the low number of patients who were PET-CT/BM+. In conclusion, FDG-PET/CT can complementally detect positive BMI patients missed by BMB in ENKL. The utility of FDG-PET/CT for defining bone marrow status has important prognostic value.


Assuntos
Medula Óssea/diagnóstico por imagem , Linfoma Extranodal de Células T-NK/diagnóstico por imagem , Tomografia por Emissão de Pósitrons , Tomografia Computadorizada por Raios X , Adolescente , Adulto , Idoso , Intervalo Livre de Doença , Feminino , Fluordesoxiglucose F18 , Humanos , Linfoma Extranodal de Células T-NK/mortalidade , Masculino , Pessoa de Meia-Idade , Imagem Multimodal/métodos , Tomografia por Emissão de Pósitrons/métodos , Estudos Retrospectivos , Tomografia Computadorizada por Raios X/métodos , Adulto Jovem
7.
Ann Hematol ; 93(11): 1889-94, 2014 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-24923454

RESUMO

The prognosis of extranodal nature killer (NK)/T cell lymphoma (ENKL) is dismal because of its aggressive course and multidrug resistance. Currently, for patients with relapsed/refractory ENKL, L-asparaginase-based regimens such as L-asparaginase, ifosfamide, methotrexate, etoposide, and dexamethasone (SMILE) or L-asparaginase, methotrexate, and dexamethasone (AspaMetDex) are recommended. We retrospectively investigated the efficacy and safety of gemcitabine, pegaspargase, cisplatin, and dexamethasone (DDGP) combination chemotherapy in the treatment of 17 relapsed/refractory ENKL patients. Clinical data from these patients were collected and analyzed. The primary end point was overall response rate (ORR). All patients were subjected to 2 to 6 cycles of DDGP chemotherapy, and the median number of cycles of DDGP regimen administrated was four. The ORR was 88.2 % (15/17), with nine patients (52.9 %) achieved complete response (CR) and six patients (35.3 %) achieved partial response (PR). The median follow-up time was 17 months (range 2-28 months). The 1-year overall survival (OS) rate and 1-year progression-free survival (PFS) were 82.4 and 64.7 %, respectively. For those CR responders, the median PFS was 17 months. Grade 3/4 neutropenia occurred in nine patients (52.9 %) and grade 3/4 thrombocytopenia occurred in six patients (35.3 %). DDGP combination chemotherapy produces favorable outcomes in relapsed/refractory ENKL, and more attention should be paid to treatment-related myelosuppression. Further prospective trials are expected to define the efficacy.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Linfoma Extranodal de Células T-NK/diagnóstico , Linfoma Extranodal de Células T-NK/tratamento farmacológico , Recidiva Local de Neoplasia/diagnóstico , Recidiva Local de Neoplasia/tratamento farmacológico , Adolescente , Adulto , Idoso , Asparaginase/administração & dosagem , Cisplatino/administração & dosagem , Estudos de Coortes , Desoxicitidina/administração & dosagem , Desoxicitidina/análogos & derivados , Dexametasona/administração & dosagem , Feminino , Humanos , Linfoma Extranodal de Células T-NK/mortalidade , Masculino , Pessoa de Meia-Idade , Recidiva Local de Neoplasia/mortalidade , Polietilenoglicóis/administração & dosagem , Recidiva , Estudos Retrospectivos , Taxa de Sobrevida/tendências , Resultado do Tratamento , Adulto Jovem , Gencitabina
8.
J Phys Chem Lett ; 15(19): 5103-5111, 2024 May 16.
Artigo em Inglês | MEDLINE | ID: mdl-38708945

RESUMO

The vast compositional space available in high-entropy oxide semiconductors offers unique opportunities for electronic band structure engineering in an unprecedented large room. In this work, with wide band gap semiconductor lithium niobate (LiNbO3) as a model system, we show that the substitutional addition of high-entropy metal cation mixtures within the Nb sublattice can lead to the formation of a single-phase solid solution featuring a substantially narrowed band gap and intense broadband visible light absorption. The resulting high-entropy LiNbO3 [denoted as Li(HE)O3] crystallizes as well-faceted nanocubes; atomic-resolution imaging and elemental mapping via transmission electron microscopy unveil a distinct local chemical complexity and lattice distortion, characteristics of high-entropy stabilized solid solution phases. Because of the presence of high-entropy stabilized Co2+ dopants that serve as active catalytic sites, Li(HE)O3 nanocubes can accomplish the visible light-driven photocatalytic water splitting in an aqueous solution containing methanol as a sacrificial electron donor without the need of any additional co-catalysts.

9.
Clin Interv Aging ; 19: 745-760, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38736563

RESUMO

Purpose: The aim of this study is to investigate the effects of a preoperative combined with postoperative moderate-intensity progressive resistance training (PRT) of the operative side in patients with hip osteoarthritis (HOA) who are undergoing total hip arthroplasty (THA). The study seeks to evaluate the impact of this combined intervention on muscle strength, gait, balance, and hip joint function in a controlled, measurable, and objective manner. Additionally, the study aims to compare the outcomes of this combined intervention with those of preoperative or postoperative muscle strength training conducted in isolation. Methods: A total of 90 patients with HOA scheduled for unilateral primary THA were randomly assigned to three groups: Pre group (preoperative PRT), Post group (postoperative PRT), and Pre& Post group (preoperative combined with postoperative PRT) focusing on hip flexion, extension, adduction, and abduction of operated side. Muscle strength, gait parameters, balance, and hip function were assessed at specific time points during a 12-month follow-up period. Results: All three groups showed significant improvements in muscle strength, with the Pre& Post group demonstrating the most pronounced and sustained gains. Gait velocity and cadence were significantly improved in the Pre& Post group at 1-month and 3-month postoperative follow-ups compared to the other groups. Similarly, the Pre& Post group exhibited superior balance performance at 3-month and 12-month postoperative follow-ups. The Harris Hip Score also showed better outcomes in the Pre& Post group at all follow-up intervals. Conclusion: Preoperative combined with postoperative moderate-intensity PRT in HOA patients undergoing THA led to superior improvements in muscle strength, gait, balance, and hip joint function compared to preoperative or postoperative PRT alone. This intervention shows significant promise in optimizing postoperative rehabilitation and enhancing patient outcomes following THA.


Assuntos
Artroplastia de Quadril , Marcha , Força Muscular , Osteoartrite do Quadril , Equilíbrio Postural , Treinamento Resistido , Humanos , Artroplastia de Quadril/reabilitação , Masculino , Feminino , Treinamento Resistido/métodos , Idoso , Pessoa de Meia-Idade , Osteoartrite do Quadril/cirurgia , Estudos Prospectivos , Amplitude de Movimento Articular , Resultado do Tratamento , Articulação do Quadril/cirurgia , Período Pós-Operatório
11.
J Nanosci Nanotechnol ; 13(1): 123-8, 2013 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-23646706

RESUMO

HSV-tk/ACV induced and killed human adenoid cystic carcinoma cell (ACC-M) in vivo and in vitro, which were observed through optical imaging and green fluorescence protein (GFP) tagging technique. ACC-M was transfected with TK-GFP, and the single clone cell ACC-M-TK-GFP was selected by G418. With fluorescent stereomicroscope, whole-body fluorescent imaging system and fluorescent microscope, we could observe ACV treated ACC-M-TK-GFP cells in cell level and nude mice. The therapies of tumor were visualized clearly with optical imaging. This study proves that optical imaging is a very good approach for studying the effect of HSV-tk/ACV on the ACC-M tumor cells and decreasing the amount of vessel about tumors cell. Optical imaging will become a visual groundwork for monitoring tumor growth and evaluating in vivo curative effect of antitumor drugs.


Assuntos
Carcinoma Adenoide Cístico/patologia , Carcinoma Adenoide Cístico/terapia , Herpesvirus Humano 1/enzimologia , Imageamento Tridimensional/métodos , Microscopia de Fluorescência/métodos , Timidina Quinase/genética , Timidina Quinase/uso terapêutico , Aciclovir/administração & dosagem , Animais , Antivirais/administração & dosagem , Carcinoma Adenoide Cístico/genética , Linhagem Celular Tumoral , Sistemas Computacionais , Proteínas de Fluorescência Verde , Humanos , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Resultado do Tratamento , Imagem Corporal Total/métodos
12.
J Tradit Chin Med ; 33(4): 479-85, 2013 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-24187869

RESUMO

OBJECTIVE: To investigate the effect of Jianpijiedu Fang (JPJDF) on phosphatase and tensin homolog (PTEN), phosphoinositide 3-kinase (PI3K), and focal adhesion kinase (FAK), and on the survival of hepatocellular carcinoma (HCC) nude mice. METHODS: Forty male nude mice were randomly divided into 4 groups. Human HCC tissue was implanted in the livers of three groups. After 24 h, the three groups were treated respectively with JPJDF (37.5 g/kg), saline (20 mL/kg) and Tegafur (FT-207, 160 mg/kg) once a day for 10 weeks. The control group without implanting the tissue was concurrently treated with saline (20 mL/kg). The survival data and body weight of all mice were recorded, and expression levels of PTEN, PI3K and FAK in normal tissue and cancer tissue of the livers were evaluated with immunohistochemical method. RESULTS: The cumulative survival rate of the mice in the JPJDF group was higher than those of the other groups. The rate of weight loss was the lowest in JPJDF group. The survivability and weight loss rate in FT-207 group were the poorest in all groups. The expression intensity of PTEN was higher in normal tissues than in cancer tissues, and lower in the normal tissues of HCC models than in that of mice without HCC. The PTEN expression intensity in normal tissue and cancer tissue from mice treated with FT-207 were lower than that from the mice treated with JPJDF or saline. The expression intensity of PI3K was higher in cancer tissue than in normal tissue. The PI3K expression intensity was the lowest in normal tissue and cancer tissue from mice treated with JPJDF, and the intensity from mice treated with FT-207 was the highest. In mice treated with JPJDF, the expression intensity of FAK was higher in the normal tissue and lower in the cancer tissue than those of the other treatment groups. CONCLUSION: The mechanism accounting for the prolonged survival of HCC-bearing mice treated with JPJDF might be related to the reduction in weight loss and the benign regulation of PTEN, PI3K, and FAK.


Assuntos
Medicamentos de Ervas Chinesas/administração & dosagem , Proteína-Tirosina Quinases de Adesão Focal/genética , Neoplasias Hepáticas/tratamento farmacológico , Proteínas dos Microfilamentos/genética , Fosfatidilinositol 3-Quinases/genética , Monoéster Fosfórico Hidrolases/genética , Animais , Feminino , Proteína-Tirosina Quinases de Adesão Focal/metabolismo , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Humanos , Neoplasias Hepáticas/enzimologia , Neoplasias Hepáticas/genética , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Proteínas dos Microfilamentos/metabolismo , Fosfatidilinositol 3-Quinases/metabolismo , Monoéster Fosfórico Hidrolases/metabolismo , Tensinas
13.
Guang Pu Xue Yu Guang Pu Fen Xi ; 33(3): 653-8, 2013 Mar.
Artigo em Chinês | MEDLINE | ID: mdl-23705426

RESUMO

Using excitation-emission matrix spectrum(EEMs) combined with parallel factor analysis (PARAFAC) examine the fluorescent components feature of dissolved organic matter (DOM) sampled from East China Sea in the summer and autumn was examined. The type, distribution and origin of the fluorescence dissolved organic matter were also discussed. Three fluorescent components were identified by PARAFAC, including protein-like component C1 (235, 280/330), terrestrial or marine humic-like component C2 (255, 330/400) and terrestrial humic-like component C3 (275, 360/480). The good linearity of the two humic-like components showed the same source or some relationship between the chemical constitutions. As a whole, the level of the fluorescence intensity in coastal ocean was higher than that of the open ocean in different water layers in two seasons. The relationship of three components with chlorophyll-a and salinity showed the DOM in the study area is almost not influenced by the living algal matter, but the fresh water outflow of the Yangtze River might be the source of them in the Yangtze River estuary in Summer. From what has been discussed above, we can draw the conclusion that the application of EEM-PARAFAC modeling will exert a profound influence upon the research of the dissolved organic matter.

14.
J Phys Chem Lett ; 13(19): 4220-4226, 2022 May 19.
Artigo em Inglês | MEDLINE | ID: mdl-35512403

RESUMO

The superior light-harvesting ability of plasmonic metallic nanostructures makes them uniquely suitable for applications in the light-driven chemical transformations relevant to renewable fuels. Here we demonstrate the use of niobium nitride (NbN) nanostructures as a nonprecious plasmonic photocatalyst for the highly efficient H2 generation from the hydrolytic decomposition of ammonia borane (AB). Porous nanostructured NbN with a hierarchical flower-like nanoarchitecture was synthesized to achieve strong broadband plasmonic absorption in the visible and near-infrared (NIR) regions. The plasmonic NbN absorbers, when loaded with an optimized amount (∼2 wt %) of nanoparticulate Ni as the catalytic centers, show notably enhanced activity toward AB decomposition for H2 evolution under both visible and NIR illumination, with the reaction rates being 4.6 (>420 nm) and 2.7 (>780 nm) times higher than that of the dark reaction. Further kinetic measurements and mechanistic investigations reveal that the photocatalytic activity originates from the plasmonic hot-carrier contributions.

15.
Artigo em Inglês | MEDLINE | ID: mdl-35280511

RESUMO

Qingjie Fuzheng granules (QFG) exert an anticancer effect against colorectal cancers (CRC). However, the pharmacological molecular mechanisms are still unclear. This study was aimed to establish a simple method to predict targets of QFG against CRC by the network pharmacology strategy. 461 compounds and 1559 targets in QFG were enriched by BATMAN-TCM. 21 of the common targets were obtained by the groups of "Jun," "Chen," "Zuo," and "Shi" medicine in QFG. The enrichment analyses of GO functional terms, KEGG pathway, and OMIM/TTD diseases displayed the targets in the different and complementary effects of four functional medicines in QFG. Then, 613 differential targets for QFG in CRC were identified. GO functional terms and KEGG pathway analyses showed that QFG regulated the inflammatory function and lipid metabolic process. There were also targets that played a role in the binding to the receptors in membranes, in the activation of the transportation signal, and provided pain relief by regulation of the neural related pathways. Next, the protein-protein interaction network was analyzed, and the levels of the predicted targets in CRC primary tumor were explored, and 7 candidate targets of QFG against CRC were obtained. Furthermore, with real-time PCR and enzyme-linked immunosorbent assay (ELISA) analysis, downregulation of dopamine D2 receptor (DRD2) and interleukin-6 (IL-6), and upregulation of interleukin-10 (IL-10) were identified following the treatment of QFG. At last, the survival and prognosis of the potential targets of QFG in CRC patients were analyzed by GenomicScape, and IL-6 was suggested to be an index for the regulation of QFG in CRC. These results might elucidate the possible antitumor mechanism of QFG and highlight the candidate therapeutic targets and the application direction in clinical treatment for QFG.

16.
Cancer Biol Med ; 19(12)2022 12 12.
Artigo em Inglês | MEDLINE | ID: mdl-36514901

RESUMO

Neutrophils play an essential role in the defense against bacterial infections and orchestrate both the innate and adaptive immune responses. With their abundant numbers, diverse function and short life span, these cells are at the forefront of immune responses, and have gained attention in recent years because of their presence in tumor sites. Neutrophil involvement pertains to tumor cells' ability to construct a suitable tumor microenvironment (TME) that accelerates their own growth and malignancy, by facilitating their interaction with surrounding cells through the circulatory and lymphatic systems, thereby influencing tumor development and progression. Studies have indicated both pro- and anti-tumor properties of infiltrating neutrophils. The TME can exploit neutrophil function, recruitment, and even production, thus resulting in pro-tumor properties of neutrophils, including promotion of genetic instability, tumor cell proliferation, angiogenesis and suppression of anti-tumor or inflammatory response. In contrast, neutrophils can mediate anti-tumor resistance by direct cytotoxicity to the tumor cells or by facilitating anti-tumor functions via crosstalk with T cells. Here, we summarize current knowledge regarding the effects of neutrophil heterogeneity under homeostatic and tumor conditions, including neutrophil phenotype and function, in cancer biology.


Assuntos
Neoplasias , Neutrófilos , Humanos , Microambiente Tumoral , Neoplasias/patologia , Linfócitos T/patologia
17.
Nat Commun ; 10(1): 4209, 2019 09 16.
Artigo em Inglês | MEDLINE | ID: mdl-31527657

RESUMO

Natural killer/T cell lymphoma (NKTCL) is a rare and aggressive malignancy with a higher prevalence in Asia and South America. However, the molecular genetic mechanisms underlying NKTCL remain unclear. Here, we identify somatic mutations of GNAQ (encoding the T96S alteration of Gαq protein) in 8.7% (11/127) of NKTCL patients, through whole-exome/targeted deep sequencing. Using conditional knockout mice (Ncr1-Cre-Gnaqfl/fl), we demonstrate that Gαq deficiency leads to enhanced NK cell survival. We also find that Gαq suppresses tumor growth of NKTCL via inhibition of the AKT and MAPK signaling pathways. Moreover, the Gαq T96S mutant may act in a dominant negative manner to promote tumor growth in NKTCL. Clinically, patients with GNAQ T96S mutations have inferior survival. Taken together, we identify recurrent somatic GNAQ T96S mutations that may contribute to the pathogenesis of NKTCL. Our work thus has implications for refining our understanding of the genetic mechanisms of NKTCL and for the development of therapies.


Assuntos
Subunidades alfa Gq-G11 de Proteínas de Ligação ao GTP/genética , Linfoma de Células T/genética , Mutação de Sentido Incorreto , Animais , Feminino , Subunidades alfa Gq-G11 de Proteínas de Ligação ao GTP/imunologia , Humanos , Linfoma de Células T/imunologia , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Camundongos Knockout , Células T Matadoras Naturais/imunologia
18.
Sci China Life Sci ; 61(1): 35-45, 2018 01.
Artigo em Inglês | MEDLINE | ID: mdl-29318501

RESUMO

The understanding of the mechanism underlying human neural development has been hampered due to lack of a cellular system and complicated ethical issues. Human embryonic stem cells (hESCs) provide an invaluable model for dissecting human development because of unlimited self-renewal and the capacity to differentiate into nearly all cell types in the human body. In this study, using a chemical defined neural induction protocol and molecular profiling, we identified Fez family zinc finger 1 (FEZF1) as a potential regulator of early human neural development. FEZF1 is rapidly up-regulated during neural differentiation in hESCs and expressed before PAX6, a well-established marker of early human neural induction. We generated FEZF1-knockout H1 hESC lines using CRISPR-CAS9 technology and found that depletion of FEZF1 abrogates neural differentiation of hESCs. Moreover, loss of FEZF1 impairs the pluripotency exit of hESCs during neural specification, which partially explains the neural induction defect caused by FEZF1 deletion. However, enforced expression of FEZF1 itself fails to drive neural differentiation in hESCs, suggesting that FEZF1 is necessary but not sufficient for neural differentiation from hESCs. Taken together, our findings identify one of the earliest regulators expressed upon neural induction and provide insight into early neural development in human.


Assuntos
Células-Tronco Embrionárias/citologia , Regulação da Expressão Gênica no Desenvolvimento , Neurogênese/genética , Neurônios/citologia , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo , Biomarcadores/metabolismo , Linhagem Celular , Perfilação da Expressão Gênica , Técnicas de Inativação de Genes , Inativação Gênica , Humanos , Neurônios/metabolismo , Proteínas Repressoras
19.
Nanomicro Lett ; 10(3): 46, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30393695

RESUMO

A promising anode material composed of SnS2@CoS2 flower-like spheres assembled from SnS2 nanosheets and CoS2 nanoparticles accompanied by reduced graphene oxide (rGO) was fabricated by a facile hydrothermal pathway. The presence of rGO and the combined merits of SnS2 and CoS2 endow the SnS2@CoS2-rGO composite with high conductivity pathways and channels for electrons and with excellent properties as an anode material for sodium-ion batteries (SIBs). A high capacity of 514.0 mAh g-1 at a current density of 200 mA g-1 after 100 cycles and a good rate capability can be delivered. The defined structure and good sodium-storage performance of the SnS2@CoS2-rGO composite demonstrate its promising application in high-performance SIBs.

20.
Proteomics Clin Appl ; 11(3-4)2017 03.
Artigo em Inglês | MEDLINE | ID: mdl-27774748

RESUMO

PURPOSE: The aim of the present study was to identify the potential relevant biomarkers to predict the therapeutic response of advanced extranodal natural killer/T cell lymphoma(ENKTL) treated with asparaginase-based treatment. EXPERIMENTAL DESIGN: Proteomic technology is used to identify differentially expressed proteins between chemotherapy-resistant and chemotherapy-sensitive patients. Then enzyme-linked immunosorbent assay is used to validate the predictive value of selective biomarkers. RESULTS: A total of 61 upregulated and 22 downregulated proteins are identified in chemotherapy-resistant patients compared with chemotherapy-sensitive patients. Furthermore, they validated that pretreatment high level 14-3-3 epsilon(ε)(≥61.95 ng/mL, 84.0 and 95.2% for sensitivity and specificity, respectively) is associated with poor 2-year overall survival (OS) (5.3 vs 68.8%, p<0.0001) and PFS (4.5 vs 76.9%, p<0.0001). In multivariate survival analysis, pretreatment high level 14-3-3 epsilon significantly is correlated with both inferior OS (p = 0.033) and PFS (p = 0.005). CONCLUSION AND CLINICAL RELEVANCE: These findings indicate that pretreatment high level 14-3-3 epsilon is an independent predictor of chemotherapy-resistance and poor prognosis for patients with advanced ENKTL in the era of asparaginase.


Assuntos
Proteínas 14-3-3/metabolismo , Asparaginase/farmacologia , Linfoma Extranodal de Células T-NK/tratamento farmacológico , Linfoma Extranodal de Células T-NK/metabolismo , Proteômica , Adolescente , Adulto , Idoso , Asparaginase/uso terapêutico , Biomarcadores Tumorais/sangue , Intervalo Livre de Doença , Regulação para Baixo/efeitos dos fármacos , Feminino , Humanos , Linfoma Extranodal de Células T-NK/sangue , Linfoma Extranodal de Células T-NK/patologia , Masculino , Pessoa de Meia-Idade , Resultado do Tratamento , Regulação para Cima/efeitos dos fármacos , Adulto Jovem
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