Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 149
Filtrar
1.
Langmuir ; 40(33): 17559-17567, 2024 Aug 20.
Artigo em Inglês | MEDLINE | ID: mdl-39105694

RESUMO

The high expense associated with electrocatalysts poses a challenge to the advancement of a hydrogen-based energy economy. The utilization of nonprecious metal-based electrocatalysts that are easily prepared and cost-effective is imperative for the future sustainability of a hydrogen society. The semiconductive MoO3-x has been identified as a promising nonprecious electrocatalyst for the hydrogen evolution reaction (HER). Nevertheless, enhancing its relatively low electrocatalytic activity toward HER remains a top priority. This study illustrates the manipulation of surface ammonium ions (NH4+) to produce uniform and distinct cobalt nanoparticles (Co NPs) on active MoO3-x supports, resulting in a more effective heterostructured composite electrocatalyst for HER. The presence of NH4+ ions in the MoO3-x film was extensively examined using infrared spectroscopy, X-ray photoelectron spectroscopy, and UV-visible colorimetric techniques. Additionally, the firmly attached NH4+ ions were employed as binding sites to precipitate Co-containing complex ions. Due to the monolayer-like adsorption of NH4+ ions, only a small quantity of Co precipitate was formed, which was subsequently electrochemically transformed into Co atoms that diffused and created well-separated uniform metallic Co nanoparticles (with an average size of less than 10 nm) on the MoO3-x film. The resulting heterostructure displays a 4.5-fold increase in current density for HER compared to the MoO3-x electrocatalyst through electrochemical assessments. The enhanced catalytic activity was ascribed to the optimized adsorption/desorption of the species involved in water reduction at the heterointerfaces and improved charge transfer rates. These nanoheterostructures hold great promise for a variety of applications in heterogeneous electrocatalysis, while the novel approach could potentially direct the creation of more heterostructures.

2.
Eur J Haematol ; 112(2): 257-265, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37698159

RESUMO

OBJECTIVES: We aim to analyze the predictive value of thromboelastography on bleeding severity of patients with chimeric antigen receptor (CAR)-T cell therapy. METHODS: A total of 80 patients with refractory/relapsed hematological malignancy were enrolled and divided into two groups: the severe bleeding group and the non-severe bleeding group. The thromboelastography data was collected on the day of CAR-T infusion and the 3rd, 7th, 10th, 13th, 17th, and 20th day after CAR-T cell infusion. RESULTS: The patients of the severe bleeding group had lower platelet (p < .007), maximum amplitude (p = .002), coagulation index (p = .005), and longer coagulation time (p = .019). Increasing trend in reaction time and coagulation time and decreasing trend in Alpha, maximum amplitude, and coagulation index on Days 0-10, opposite on Days 10-20. Univariate logistic regression analysis and multivariable logistic regression analysis showed maximum amplitude on the 3rd day after CAR-T cell infusion (MA3) (OR = 0.9; 95% CI = 0.84-0.95; p < .001) and cytokine release syndrome grade (OR = 2.57; 95% CI = 1.35-5.32; p = .006) were significantly associated with high bleeding severity. CONCLUSIONS: Thromboelastography was considered to be a good predictor of bleeding severity.


Assuntos
Neoplasias Hematológicas , Receptores de Antígenos Quiméricos , Humanos , Tromboelastografia , Imunoterapia Adotiva/efeitos adversos , Neoplasias Hematológicas/diagnóstico , Neoplasias Hematológicas/terapia , Hemorragia/diagnóstico , Hemorragia/etiologia , Hemorragia/terapia , Terapia Baseada em Transplante de Células e Tecidos
3.
Inorg Chem ; 63(1): 730-738, 2024 Jan 08.
Artigo em Inglês | MEDLINE | ID: mdl-38100509

RESUMO

A novel copper nanoparticle variant, denoted as Cu98Ni2 NPs, which incorporate Ni atoms in an atomically dispersed manner, has been successfully synthesized via a straightforward one-pot electrochemical codeposition process. These nanoparticles were subsequently employed as an anode to facilitate the oxidation of furfural, leading to the production of hydrogen gas. Voltammetric measurements revealed that the inclusion of trace amounts of Ni atoms in the nanoparticles resulted in a pronounced synergistic electronic effect between Cu and Ni. Consequently, a 43% increase in current density at 0.1 V was observed in comparison to pure Cu NPs. Importantly, when the Cu98Ni2 NPs were irradiated with visible light, a remarkable current density enhancement factor of 505% at 0.1 V was achieved relative to that of pure Cu NPs in the absence of light. This enhancement can be attributed to localized surface plasmon resonance induced by visible light, which triggers photothermal and photoelectric effects. These effects collectively contribute to the significant overall improvement in the electrocatalytic oxidation of furfural, leading to enhanced hydrogen evolution.

4.
Cell Mol Biol (Noisy-le-grand) ; 70(4): 127-133, 2024 Apr 28.
Artigo em Inglês | MEDLINE | ID: mdl-38678614

RESUMO

In this study, we summarized the key findings and potential implications of association studies investigating the relationship between gut microbiota composition and risks for Diabetic nephropathy (DN). We used Mendelian randomization (MR) analysis to explore the relationship between gut microbiota and DN using two different publicly available DN databases. The results were also summarized using five mainstream MR analysis methods. We controlled for various possible biases in the results. The results showed that specific bacterial genera were associated with increased or decreased risk of DN. These associations can be attributed to a variety of factors, including metabolites produced by certain bacteria. Most of our findings are consistent with the existing research findings, but there are still some differences with the existing results. In addition, we also pointed out that some microbiota that may be associated with DN but remain unnoticed can bring new research directions. Our work made use of MR, a reliable technique for examining causal correlations using genetic data investigating potential processes, carrying out longitudinal studies, looking into intervention options, and using a multi-omics approach may be future research avenues. Further, our findings also point to a few unexplored possible study paths for DN in the future. These initiatives may improve our reconciliation of the internal relationships between the gut microbiota and DN and pave the way for more precise prevention and treatment methods. However, it is also critical to recognize any potential restrictions, such as those caused by sample size, population variety, and analytical techniques.


Assuntos
Nefropatias Diabéticas , Microbioma Gastrointestinal , Análise da Randomização Mendeliana , Humanos , Microbioma Gastrointestinal/genética , Nefropatias Diabéticas/genética , Nefropatias Diabéticas/microbiologia , Fatores de Risco
5.
Clin Exp Pharmacol Physiol ; 51(7): e13874, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38797519

RESUMO

Glycolysis is vital for the excessive proliferation of keratinocytes in psoriasis, and uridine phosphorylase-1 (UPP1) functions as an enhancer of cancer cell proliferation. However, little is known about whether UPP1 promotes keratinocyte proliferation and accelerates psoriasis development. This study revealed that UPP1 facilitates cell viability and cell-cycle progression in human epidermal keratinocytes (HEKs) by modulating the glycolytic pathway. Bioinformatics analysis of UPP1 gene expression and its correlation with the Reactome revealed that UPP1 mRNA expression, cell-cycle progression, the interleukin-6 (IL-6)/Janus kinase (JAK)/signal transducer and activator of transcription 3 (STAT3) pathway and glycolysis were positively associated with psoriasis. Cell proliferation, the cell cycle and glycolysis were evaluated after UPP1 was silenced or overexpressed. The results showed that UPP1 overexpression increased cell proliferation, cell-cycle progression and glycolysis, which was contrary to the effects of UPP1 silencing. However, the STAT3 inhibitor diminished UPP1 expression because STAT3 can bind to the UPP1 promoter. In conclusion, UPP1 was significantly activated by the IL-6/STAT3 pathway and could modulate glycolysis to regulate cell proliferation and cell-cycle progression in keratinocytes during the development of psoriasis.


Assuntos
Ciclo Celular , Sobrevivência Celular , Glicólise , Queratinócitos , Fator de Transcrição STAT3 , Uridina Fosforilase , Humanos , Proliferação de Células , Epiderme/metabolismo , Epiderme/patologia , Interleucina-6/metabolismo , Interleucina-6/genética , Queratinócitos/metabolismo , Psoríase/patologia , Psoríase/metabolismo , Psoríase/genética , Transdução de Sinais , Fator de Transcrição STAT3/metabolismo , Fator de Transcrição STAT3/genética , Uridina Fosforilase/metabolismo , Uridina Fosforilase/genética
6.
Nanotechnology ; 34(15)2023 Feb 03.
Artigo em Inglês | MEDLINE | ID: mdl-36652695

RESUMO

Using solar energy to enhance the transformation rate of organic molecules is a promising strategy to advance chemical synthesis and environmental remediation. Plasmonic nanoparticles responsive to sunlight show great promise in the catalysis of chemical reactions. In this work, we used a straightforward wet-chemistry method to synthesize plasmonic octahedral gold nanoparticles (NPs) coated with thin molybdenum oxide (MoO3-x), Au@MoO3-xNPs, which exhibited strong surface plasmon resonance in a broad wavelength range. The synthesized Au@MoO3-xNPs were characterized by UV-vis, SEM, TEM, EDS, XPS, and the electrochemical technique of cyclic voltammetry (CV). The catalytic performance of Au@MoO3-xNPs under visible light irradiation was investigated using the reduction of 4-nitrophenol (4-NP) to 4-aminophenol (4-AP) as a model reaction. The presence of a thin capping layer of MoO3-xon our Au NPs contributed to the broadening of their range of absorption of visible light, resulting in a stronger intra-particle plasmonic resonance and the modulation of surface energy and electronic state. Accordingly, the kinetics of plasmon photocatalytic transformation of 4-NP to 4-AP was significantly accelerated (by a factor of 8.1) under visible light, compared to uncapped Au NPs in the dark. Our as-synthesized Au@MoO3-xNPs is an example that the range of plasmonic wavelengths of NPs can be effectively broadened by coating them with another plasmon-active (semiconducting) material, which substantially improves their plasmonic photocatalytic performance. Meanwhile, the synthesized Au@MoO3-xNPs can be used to accelerate the transformation of organic molecules under visible light irradiation.

7.
Lasers Surg Med ; 55(3): 316-326, 2023 03.
Artigo em Inglês | MEDLINE | ID: mdl-36806261

RESUMO

OBJECTIVES: Artificial dermal scaffold (ADS) has undergone rapid development and been increasingly used for treating skin wound in clinics due to its good biocompatibility, controllable degradation, and low risk of disease infection. To obtain good treatment efficacy, ADS needs to be monitored longitudinally during the treatment process. For example, scaffold-tissue fit, cell in-growth, vascular regeneration, and scaffold degradation are the key properties to be inspected. However, to date, there are no effective, real-time, and noninvasive techniques to meet the requirement of the scaffold monitoring above. MATERIALS AND METHODS: In this study, we propose to use optical coherence tomography (OCT) to monitor ADS in vivo through three-dimensional imaging. A swept source OCT system with a handheld probe was developed for in vivo skin imaging. Moreover, a cell in-growth, vascular regeneration, and scaffold degradation rate (IRDR) was defined with the volume reduction rate of the scaffold's collagen sponge layer. To measure the IRDR, a semiautomatic image segmentation algorithm was designed based on U-Net to segment the collagen sponge layer of the scaffold from OCT images. RESULTS: The results show that the scaffold-tissue fit can be clearly visualized under OCT imaging. The IRDR can be computed based on the volume of the segmented collagen sponge layer. It is observed that the IRDR appeared to a linear function of the time and in addition, the IRDR varied among different skin parts. CONCLUSION: Overall, it can be concluded that OCT has a good potential to monitor ADS in vivo. This can help guide the clinicians to control the treatment with ADS to improve the therapy.


Assuntos
Pele , Tomografia de Coerência Óptica , Tomografia de Coerência Óptica/métodos , Pele/diagnóstico por imagem , Colágeno , Imageamento Tridimensional
8.
J Clin Lab Anal ; 36(10): e24673, 2022 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-36036748

RESUMO

BACKGROUND: Hepatocellular carcinoma (HCC) accounts for 85%-90% of primary liver cancer. MicroRNAs (miRNAs) are small non-coding RNAs that regulate gene expression by targeting the 3'UTR of mRNA. Abnormal expression and regulation of miRNAs are involved in the occurrence and progression of HCC, and miRNAs can also play a role in the diagnosis and treatment of HCC as oncogenes or tumor suppressors. METHODS: In the past decades, a large number of studies have shown that miRNAs play an essential regulatory role in HCC and have potential as biomarkers for HCC. We reviewed the literature to summarize these studies. RESULTS: By reviewing the literature, we retrospected the roles of miRNAs in the development, diagnosis, treatment, and prognosis of HCC, and put forward prospects for the further research on miRNAs in the precision treatment of HCC. CONCLUSION: MicroRNAs are important regulators and biomarkers in the occurrence, progression, outcome, and treatment of HCC, and can provide new targets and strategies for improving the therapeutic effect of HCC.


Assuntos
Carcinoma Hepatocelular , Neoplasias Hepáticas , MicroRNAs , Regiões 3' não Traduzidas , Biomarcadores Tumorais/genética , Carcinoma Hepatocelular/diagnóstico , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/terapia , Regulação Neoplásica da Expressão Gênica , Humanos , Neoplasias Hepáticas/diagnóstico , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/terapia , MicroRNAs/genética , MicroRNAs/metabolismo , Prognóstico
9.
J Craniofac Surg ; 33(4): e355-e358, 2022 Jun 01.
Artigo em Inglês | MEDLINE | ID: mdl-35225590

RESUMO

PURPOSE: To evaluate the ciliary body mechanical load during low speed impact using finite element method to explain the mechanism of the cause of angle recession and cyclodialysis cleft. METHODS: Optical coherence tomography images were obtained to assess the patient's ciliary body angle recession. A finite element eye model was established based on Virginia Tech eye model with the consideration of dynamic impact of a projectile striking an eye. The mechanical properties of the ocular tissues were obtained from literatures. The stress and strain were evaluated. RESULTS: The stress distribution of the eye was calculated. The stress concentration at zonules was observed after 0.75 ms of the impact. The maximum stress at the cornea reached 3.8 MPa. The maximum stress at ciliary body was 57 KPa, which has high probability to cause ciliary body injury. The maximum stress at zonules was 0.98 MPa. The lateral expansion also reduces the forces transmitted along the sclera to the rear part of the eye. CONCLUSIONS: The eye under frontal impact will result in lateral expansion, which increase the stretch force of the lens, zonules and ciliary body. This mechanism can be seen as the protection for retina. The boundary of ciliary body is the most vulnerable position, where angle recession and cyclodialyses cleft will occur before retina damage occurrence. TRANSLATIONAL RELEVANCE: The finite element model explains the blunt low speed impact induced ciliary body related injuries, which enables us to assess the ocular injury for low energy impact and better diagnosis and treatment in clinics.


Assuntos
Corpo Ciliar , Traumatismos Oculares , Corpo Ciliar/diagnóstico por imagem , Corpo Ciliar/lesões , Simulação por Computador , Traumatismos Oculares/diagnóstico por imagem , Traumatismos Oculares/etiologia , Análise de Elementos Finitos , Humanos , Esclera
10.
Am J Physiol Cell Physiol ; 320(5): C880-C891, 2021 05 01.
Artigo em Inglês | MEDLINE | ID: mdl-33502949

RESUMO

Renal cell carcinoma (RCC) has the highest mortality rate among urological cancers and tumor angiogenesis that plays a critical role in RCC progress. Epidermal growth factor-like domain multiple 7 (EGFL7) has been recently identified as a regulator in RCC tumor angiogenesis and progression. Long noncoding RNA (LncRNA) HOTAIR has been considered as a pro-oncogene in multiple cancers, but its precise mechanism of tumor angiogenesis has rarely been reported. MicroRNA-126 (miR-126) functions as a tumor suppressor in RCC. However, the underlying tumor angiogenesis mechanism of HOTAIR/miR-126 axis in RCC has not been studied. The proliferation, migration, angiogenesis, and expression of EGFL7 and related proteins in extracellular signal-regulated kinase (ERK)/activators of transcription 3 (STAT3) signal pathway were determined to examine the effect and mechanism of HOTAIR and miR-126 on RCC progress. The regulatory relationship of HOTAIR and miR-126, as well as miR-126 and EGFL7 were tested using dual-luciferase reporter assay. Aenograft RCC mice model was used to examine the effect of HOTAIR on RCC tumor growth and metastasis in vivo. HOTAIR knockdown and miR-126 overexpression suppressed the proliferation, migration, and angiogenesis of RCC cells. HOTAIR regulated EGFL7 expression by competitively binding to miR-126. Knockdown of HOTAIR significantly suppressed the RCC tumor progression and lung metastasis in vivo. These findings suggest that lncRNA HOTAIR regulate RCC angiogenesis through miR-126/EGFL7 axis and provide a new perspective on the molecular pathways of angiogenesis in RCC development, which might be potential therapeutic targets for RCC treatment.


Assuntos
Proteínas de Ligação ao Cálcio/metabolismo , Carcinoma de Células Renais/metabolismo , Família de Proteínas EGF/metabolismo , Neoplasias Renais/metabolismo , MicroRNAs/metabolismo , Neovascularização Patológica , RNA Longo não Codificante/metabolismo , Animais , Proteínas de Ligação ao Cálcio/genética , Carcinoma de Células Renais/genética , Carcinoma de Células Renais/patologia , Linhagem Celular Tumoral , Movimento Celular , Proliferação de Células , Família de Proteínas EGF/genética , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Neoplasias Renais/genética , Neoplasias Renais/patologia , Masculino , Camundongos Endogâmicos BALB C , MicroRNAs/genética , Densidade Microvascular , Pessoa de Meia-Idade , Invasividade Neoplásica , RNA Longo não Codificante/genética , Transdução de Sinais , Carga Tumoral
11.
Acta Pharmacol Sin ; 42(5): 665-678, 2021 May.
Artigo em Inglês | MEDLINE | ID: mdl-32860006

RESUMO

Mitochondrial dysfunction is considered to be one of the important pathogenesis in Parkinson's disease (PD). We previously showed that pyrroloquinoline quinone (PQQ) could protect SH-SY5Y cells and dopaminergic neurons from cytotoxicity and prevent mitochondrial dysfunction in rotenone-induced PD models. In the present study we investigated the mechanisms underlying the protective effects of PQQ in a mouse PD model, which was established by intraperitoneal injection of rotenone (3 mg·kg-1·d-1, ip) for 3 weeks. Meanwhile the mice were treated with PQQ (0.8, 4, 20 mg·kg-1·d-1, ip) right after rotenone injection for 3 weeks. We showed that PQQ treatment dose-dependently alleviated the locomotor deficits and nigral dopaminergic neuron loss in PD mice. Furthermore, PQQ treatment significantly diminished the reduction of mitochondria number and their pathological change in the midbrain. PQQ dose-dependently blocked rotenone-caused reduction in the expression of PGC-1α and TFAM, two key activators of mitochondrial gene transcription, in the midbrain. In rotenone-injured human neuroblastoma SH-SY5Y cells, PTMScan Direct analysis revealed that treatment with PQQ (100 µM) differentially regulated protein phosphorylation; the differentially expressed phosphorylated proteins included the signaling pathways related with adenosine 5'-monophosphate (AMP)-activated protein kinase (AMPK) pathway. We conducted Western blot analysis and confirmed that AMPK was activated by PQQ both in PD mice and in rotenone-injured SH-SY5Y cells. Pretreatment with AMPK inhibitor dorsomorphin (4 µM) significantly attenuated the protective effect and mitochondrial biogenesis by PQQ treatment in rotenone-injured SH-SY5Y cells. Taken together, PQQ promotes mitochondrial biogenesis in rotenone-injured mice and SH-SY5Y cells via activation of AMPK signaling pathway.


Assuntos
Mitocôndrias/efeitos dos fármacos , Fármacos Neuroprotetores/uso terapêutico , Biogênese de Organelas , Cofator PQQ/uso terapêutico , Doença de Parkinson Secundária/tratamento farmacológico , Transdução de Sinais/efeitos dos fármacos , Proteínas Quinases Ativadas por AMP/metabolismo , Animais , Comportamento Animal/efeitos dos fármacos , Linhagem Celular Tumoral , Humanos , Locomoção/efeitos dos fármacos , Masculino , Camundongos Endogâmicos ICR , Proteínas do Tecido Nervoso/efeitos dos fármacos , Doença de Parkinson Secundária/induzido quimicamente , Doença de Parkinson Secundária/enzimologia , Fosforilação/efeitos dos fármacos , Rotenona
12.
Proc Natl Acad Sci U S A ; 115(50): E11661-E11670, 2018 12 11.
Artigo em Inglês | MEDLINE | ID: mdl-30478051

RESUMO

Long noncoding RNAs (lncRNAs) function through a diverse array of mechanisms that are not presently fully understood. Here, we sought to find lncRNAs differentially regulated in cancer cells resistant to either TNF-related apoptosis-inducing ligand (TRAIL) or the Mcl-1 inhibitor UMI-77, agents that act through the extrinsic and intrinsic apoptotic pathways, respectively. This work identified a commonly up-regulated lncRNA, ovarian adenocarcinoma-amplified lncRNA (OVAAL), that conferred apoptotic resistance in multiple cancer types. Analysis of clinical samples revealed OVAAL expression was significantly increased in colorectal cancers and melanoma in comparison to the corresponding normal tissues. Functional investigations showed that OVAAL depletion significantly inhibited cancer cell proliferation and retarded tumor xenograft growth. Mechanically, OVAAL physically interacted with serine/threonine-protein kinase 3 (STK3), which, in turn, enhanced the binding between STK3 and Raf-1. The ternary complex OVAAL/STK3/Raf-1 enhanced the activation of the RAF protooncogene serine/threonine-protein kinase (RAF)/mitogen-activated protein kinase kinase 1 (MEK)/ERK signaling cascade, thus promoting c-Myc-mediated cell proliferation and Mcl-1-mediated cell survival. On the other hand, depletion of OVAAL triggered cellular senescence through polypyrimidine tract-binding protein 1 (PTBP1)-mediated p27 expression, which was regulated by competitive binding between OVAAL and p27 mRNA to PTBP1. Additionally, c-Myc was demonstrated to drive OVAAL transcription, indicating a positive feedback loop between c-Myc and OVAAL in controlling tumor growth. Taken together, these results reveal that OVAAL contributes to the survival of cancer cells through dual mechanisms controlling RAF/MEK/ERK signaling and p27-mediated cell senescence.


Assuntos
Senescência Celular/genética , Senescência Celular/fisiologia , Inibidor de Quinase Dependente de Ciclina p27/genética , Inibidor de Quinase Dependente de Ciclina p27/metabolismo , Sistema de Sinalização das MAP Quinases , RNA Longo não Codificante/genética , RNA Longo não Codificante/metabolismo , Animais , Apoptose/genética , Apoptose/fisiologia , Linhagem Celular Tumoral , Proliferação de Células/genética , Proliferação de Células/fisiologia , Sobrevivência Celular/genética , Sobrevivência Celular/fisiologia , Neoplasias Colorretais/genética , Neoplasias Colorretais/metabolismo , Neoplasias Colorretais/patologia , Xenoenxertos , Humanos , Melanoma/genética , Melanoma/metabolismo , Melanoma/patologia , Camundongos , Camundongos Nus , Proteínas Serina-Treonina Quinases/genética , Proteínas Serina-Treonina Quinases/metabolismo , Estabilidade Proteica , Proteínas Proto-Oncogênicas c-myc/genética , Proteínas Proto-Oncogênicas c-myc/metabolismo , Proteínas Proto-Oncogênicas c-raf/genética , Proteínas Proto-Oncogênicas c-raf/metabolismo , RNA Mensageiro/genética , RNA Mensageiro/metabolismo , Serina-Treonina Quinase 3 , Ligante Indutor de Apoptose Relacionado a TNF/genética , Ligante Indutor de Apoptose Relacionado a TNF/metabolismo
13.
Int J Mol Sci ; 22(15)2021 Jul 26.
Artigo em Inglês | MEDLINE | ID: mdl-34360755

RESUMO

Increasing attention is being focused on the use of polypeptide-based N-methyl-d-aspartate (NMDA) receptor antagonists for the treatment of nervous system disorders. In our study on Achyranthes bidentata Blume, we identified an NMDA receptor subtype 2B (NR2B) antagonist that exerts distinct neuroprotective actions. This antagonist is a 33 amino acid peptide, named bidentatide, which contains three disulfide bridges that form a cysteine knot motif. We determined the neuroactive potential of bidentatide by evaluating its in vitro effects against NMDA-mediated excitotoxicity. The results showed that pretreating primary cultured hippocampal neurons with bidentatide prevented NMDA-induced cell death and apoptosis via multiple mechanisms that involved intracellular Ca2+ inhibition, NMDA current inhibition, and apoptosis-related protein expression regulation. These mechanisms were all dependent on bidentatide-induced inhibitory regulation of NR2B-containing NMDA receptors; thus, bidentatide may contribute to the development of neuroprotective agents that would likely possess the high selectivity and safety profiles inherent in peptide drugs.


Assuntos
Achyranthes/química , Hipocampo/metabolismo , Neurônios/metabolismo , Fármacos Neuroprotetores , Peptídeos , Proteínas de Plantas , Receptores de N-Metil-D-Aspartato/antagonistas & inibidores , Animais , Apoptose/efeitos dos fármacos , Cálcio/metabolismo , Fármacos Neuroprotetores/química , Fármacos Neuroprotetores/isolamento & purificação , Fármacos Neuroprotetores/farmacologia , Peptídeos/química , Peptídeos/isolamento & purificação , Peptídeos/farmacologia , Proteínas de Plantas/química , Proteínas de Plantas/isolamento & purificação , Proteínas de Plantas/farmacologia , Ratos , Ratos Sprague-Dawley , Receptores de N-Metil-D-Aspartato/metabolismo
14.
Pharmacol Res ; 153: 104637, 2020 03.
Artigo em Inglês | MEDLINE | ID: mdl-31935454

RESUMO

The Aidi injection contains multiple active ingredients, including astragaloside (Re, Rb1, and Rg1), ginsenoside, cantharidin, elentheroside E, and syringin, and it is administered with vinorelbine and cisplatin (NP) to treat non-small-cell lung carcinoma (NSCLC). In this study, we performed a systematic review and meta-analysis to determine the clinical efficacy and safety of the Aidi injection with NP, and the optimal threshold and treatment regimen to produce the desired responses. We collected all studies regarding the Aidi injection with NP for NSCLC from Chinese and English databases (up to April 2019). Risk of methodological bias was evaluated for each study. Data for analysis were extracted using a standard data extraction form. Evidence quality was assessed following the Grading of Recommendations Assessment, Development and Evaluation approach. We included 54 trials containing 4,053 patients for analysis. Combining the Aidi injection with NP significantly increased the objective response rate (odds ratio [OR], 1.32; confidence interval [CI], 1.23, 1.42), disease control rate (OR, 1.14; CI, 1.11, 1.18), and quality of life (OR, 1.80; CI, 1.61, 1.98), with decreased risks of myelosuppression, neutropenia, thrombocytopenia, anemia, gastrointestinal reaction, and liver dysfunction. For patients with a Karnofsky Performance Status score of ≥60, the Aidi injection (50 mL/day, two weeks/cycle, with two to three cycles) treatment with vinorelbine (25 mg/m2) and cisplatin (30-35 mg/m2 or 40-50 mg/m2) might be the optimal regimen for producing the desired tumor response and achieving a good safety level. Most results were robust, and their quality was moderate. The results suggest that administration of the Aidi injection and concomitant NP is beneficial to NSCLC, and provide evidence for the optimal threshold and treatment regimen that may improve tumor response with a good safety level.


Assuntos
Protocolos de Quimioterapia Combinada Antineoplásica/uso terapêutico , Carcinoma Pulmonar de Células não Pequenas/tratamento farmacológico , Cisplatino/uso terapêutico , Medicamentos de Ervas Chinesas/uso terapêutico , Neoplasias Pulmonares/tratamento farmacológico , Vinorelbina/uso terapêutico , Protocolos de Quimioterapia Combinada Antineoplásica/administração & dosagem , Protocolos de Quimioterapia Combinada Antineoplásica/efeitos adversos , Cisplatino/administração & dosagem , Cisplatino/efeitos adversos , Medicamentos de Ervas Chinesas/administração & dosagem , Medicamentos de Ervas Chinesas/efeitos adversos , Humanos , Injeções , Qualidade de Vida , Ensaios Clínicos Controlados Aleatórios como Assunto , Resultado do Tratamento , Vinorelbina/administração & dosagem , Vinorelbina/efeitos adversos
15.
Molecules ; 25(19)2020 Sep 23.
Artigo em Inglês | MEDLINE | ID: mdl-32977419

RESUMO

Neuroinflammation is a feature common to neurodegenerative diseases, such as Parkinson's disease (PD), which might be responsive to therapeutic intervention. Rotenone has been widely used to establish PD models by inducing mitochondrial dysfunction and inflammation. Our previous studies have reported that pyrroloquinoline quinone (PQQ), a naturally occurring redox cofactor, could prevent mitochondrial dysfunction in rotenone induced PD models by regulating mitochondrial functions. In the present study, we aimed to investigate the effect of PQQ on neuroinflammation and the mechanism involved. BV2 microglia cells were pre-treated with PQQ followed by rotenone incubation. The data showed that PQQ did not affect the cell viability of BV2 cells treated with rotenone, while the conditioned medium (CM) of BV2 cells pre-treated with PQQ significantly increased cell viability of SH-SY5Y cells. In rotenone-treated BV2 cells, PQQ dose-dependently decreased lactate dehydrogenase (LDH) release and suppressed the up-regulation of pro-inflammation factors, such as interleukin-1ß (IL-1ß), IL-6 and tumor necrosis factor-α (TNF-α) in the cultured media, as well as nitric oxide (NO) release induced by rotenone. PQQ pretreatment also increased the ratio of LC3-II/LC3-I and expression of Atg5 in BV2 cells stimulated with rotenone. Additionally, the autophagosome observed by transmission electron microscopy (TEM) and co-localization of mitochondria with lysosomes indicated that mitophagy was induced by PQQ in rotenone-injured BV2 cells, and the PINK1/parkin mediated mitophagy pathway was regulated by PQQ. Further, autophagy inhibitor, 3-methyladenine (3-MA), partially abolished the neuroprotective effect of PQQ and attenuated the inhibition of inflammation with PQQ pretreatment. Taken together, our data extend our understanding of the neuroprotective effect of PQQ against rotenone-induced injury and provide evidence that autophagy enhancement might be a novel therapeutic strategy for PD treatment.


Assuntos
Anti-Inflamatórios/farmacologia , Autofagia/efeitos dos fármacos , Microglia/citologia , Microglia/efeitos dos fármacos , Fármacos Neuroprotetores/farmacologia , Cofator PQQ/farmacologia , Rotenona/efeitos adversos , Anti-Inflamatórios/uso terapêutico , Linhagem Celular Tumoral , Sobrevivência Celular/efeitos dos fármacos , Humanos , Inflamação/induzido quimicamente , Inflamação/tratamento farmacológico , Inflamação/patologia , Fármacos Neuroprotetores/uso terapêutico , Cofator PQQ/uso terapêutico
16.
Biochem Biophys Res Commun ; 509(2): 407-413, 2019 02 05.
Artigo em Inglês | MEDLINE | ID: mdl-30594391

RESUMO

BACKGROUND: The forkhead activin signal transducer 1 (FAST1) is involved in several oncogenic signaling pathways and its abnormal expression has been discovered in some cancers. Yet the role of FAST1 in colorectal cancer (CRC) remains largely unclear. Therefore, the goal of this study was to explore the function of FAST1 in CRC. METHODS: In this study, we analyzed FAST1 expression and its relationship with clinicopathological parameters and prognostic significance in CRC via immunohistochemistry analysis. The effects and mechanisms of FAST1 on cell proliferation, migration and invasion were explored in vitro and in vivo. RESULTS: We found that increased FAST1 as an independent prognostic factor was positively associated with TNM stage and pathological grade in CRC. FAST1 overexpression promoted the CRC cell proliferation, migration and invasion in vivo. Furthermore, mechanistic studies implicated that FAST1 enhanced the pulmonary metastasis of CRC cells through down-regulating E-cadherin levels. CONCLUSIONS: In summary, FAST1 was significantly associated with CRC progression and could serve as an independent prognostic factor. FAST1 may be potential therapeutic target for CRC patients.


Assuntos
Neoplasias Colorretais/genética , Fatores de Transcrição Forkhead/genética , Regulação Neoplásica da Expressão Gênica , Neoplasias Pulmonares/genética , Idoso , Animais , Antígenos CD/genética , Antígenos CD/metabolismo , Caderinas/genética , Caderinas/metabolismo , Movimento Celular , Proliferação de Células , Neoplasias Colorretais/diagnóstico , Neoplasias Colorretais/mortalidade , Neoplasias Colorretais/patologia , Feminino , Fatores de Transcrição Forkhead/metabolismo , Células HCT116 , Xenoenxertos , Humanos , Neoplasias Pulmonares/diagnóstico , Neoplasias Pulmonares/mortalidade , Neoplasias Pulmonares/secundário , Masculino , Camundongos , Camundongos Nus , Pessoa de Meia-Idade , Gradação de Tumores , Invasividade Neoplásica , Estadiamento de Neoplasias , Prognóstico , Transdução de Sinais , Análise de Sobrevida
17.
Cytotherapy ; 21(2): 125-147, 2019 02.
Artigo em Inglês | MEDLINE | ID: mdl-30554868

RESUMO

BACKGROUND AIMS: Cytokine-induced killer (CIK) cells are the most commonly used cellular immunotherapy for multiple tumors. To further confirm whether chemotherapy with CIK cells improves clinical effectiveness and to reveal its optimal use in non-small cell lung cancer (NSCLC), we systematically reevaluated all relevant studies. METHODS: We collected all studies about chemotherapy with CIK cells for NSCLC from the Medline, Embase, Web of Science, China National Knowledge Infrastructure Database (CNKI), Chinese Scientific Journals Full-Text Database (VIP), Wanfang Data, China Biological Medicine Database (CBM), Cochrane Central Register of Controlled Trials (CENTRAL), Chinese clinical trial registry (Chi-CTR), World Health Organization (WHO) International Clinical Trials Registry Platform (ICTRP) and U.S. clinical trials. We evaluated their quality according to the Cochrane evaluation handbook of randomized controlled trials (RCTs) (version 5.1.0), extracted the data using a standard data extraction form, synthesized the data using meta-analysis and finally rated the evidence quality using the Grading of Recommendations Assessment, Development and Evaluation (GRADE) approach. RESULTS: Thirty-two RCTs with 2250 patients were included, and most trials had unclear risk of bias. The merged risk ratios values and their 95% confidence intervals of meta-analysis for objective response rate, disease control rate, 1- and 2-year overall survival rates, 1- and 2-year progression-free survival rates were as following: 1.45 (1.31-1.61), 1.26 (1.16-.37), 1.42 (1.23-1.63), 2.06 (1.36-3.12), 1.93 (1.38-2.69) and 3.30 (1.13-9.67). Compared with chemotherapy alone, all differences were statistically significant. CIK cells could increase the CD3+ T cells, CD3+ CD4+ T cells, NK cells and the ratio of CD4+/CD8+ T cells. The chemotherapy with CIK cells had a lower risk of hematotoxicity, gastrointestinal toxicity, liver injury and a higher fever than that of chemotherapy alone. The evidence quality was "moderate" to "very low." CONCLUSIONS: The available moderate evidences indicate that chemotherapy with CIK cells, especially autologous CIK cells, can significantly improve the tumor responses, 1- and 2-year overall and progression-free survival rates in patients with advanced NSCLC. This treatment does have a high risk of fever. The optimal use may be treatment with one or two cycles and in combination with vinorelbine and cisplatin, paclitaxel and cisplatin, or docetaxel and cisplatin.


Assuntos
Carcinoma Pulmonar de Células não Pequenas/terapia , Células Matadoras Induzidas por Citocinas/imunologia , Imunoterapia/efeitos adversos , Neoplasias Pulmonares/terapia , Ensaios Clínicos Controlados Aleatórios como Assunto , Adolescente , Adulto , Idoso , Idoso de 80 Anos ou mais , Carcinoma Pulmonar de Células não Pequenas/imunologia , Carcinoma Pulmonar de Células não Pequenas/mortalidade , China , Feminino , Seguimentos , Humanos , Imunidade Celular , Neoplasias Pulmonares/imunologia , Neoplasias Pulmonares/mortalidade , Masculino , Pessoa de Meia-Idade , Intervalo Livre de Progressão , Taxa de Sobrevida , Linfócitos T/imunologia , Adulto Jovem
18.
Mol Cell Biochem ; 439(1-2): 141-150, 2018 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-28780753

RESUMO

Peripheral nerve injury is a common disease with a low recovery rate. A better understanding of the molecular changes underlying peripheral nerve injury and regeneration may contribute to the development of novel therapies for the treatment of peripheral nerve injury. In the current study, we analyzed differentially expressed genes in rat sciatic nerve stumps at 1, 4, 7, and 14 days post nerve crush and built biological functional networks at each time point. Our outcomes suggested that "Neurological Disease" involved networks were significant at 1 day post nerve crush, "Cellular Assembly and Organization" involved networks were important at 4 and 7 days post nerve crush, while "Tissue Morphology" involved networks were important at 14 days post nerve crush. We also investigated the temporal expression patterns as well as central genes of these critical networks. Taken together, our study revealed genetic networks and gene-gene interactions in the injured nerve stumps and thus might enhance our understanding of peripheral nerve regeneration.


Assuntos
Redes Reguladoras de Genes , Regeneração Nervosa , Proteínas do Tecido Nervoso , Traumatismos dos Nervos Periféricos , Nervo Isquiático/fisiologia , Animais , Masculino , Proteínas do Tecido Nervoso/biossíntese , Proteínas do Tecido Nervoso/genética , Traumatismos dos Nervos Periféricos/genética , Traumatismos dos Nervos Periféricos/metabolismo , Traumatismos dos Nervos Periféricos/patologia , Ratos , Ratos Sprague-Dawley , Nervo Isquiático/patologia
19.
Mediators Inflamm ; 2017: 3827841, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28490837

RESUMO

After peripheral nerve injury, immune/inflammatory responses are triggered, which are critical for nerve regeneration. Despite their importance, the underlying molecular changes in immune/inflammatory responses remain largely unknown. In this study, we systematically analyzed differentially expressed genes in immune/inflammatory-related pathways at high temporal resolution and experimentally validated gene expression changes with RT-PCR following sciatic nerve crush in rats. We found that immune/inflammatory reactions not only occur in the acute injury but also remained activated over two weeks after injury. Detailed bioinformatic studies suggested that multiple immune/inflammatory pathways, including agranulocyte adhesion and diapedesis, granulocyte adhesion and diapedesis, IL-6 signaling, and IL-10 signaling, were sustained activated during nerve degeneration and regeneration. Our current study expands our understanding of the molecular basis of altered immune/inflammatory-related pathways following injury and thus might offer the possibility of targeting related molecules as therapeutic intervention for peripheral nerve regeneration.


Assuntos
Inflamação/genética , Regeneração Nervosa/fisiologia , Animais , Biologia Computacional , Inflamação/metabolismo , Interleucina-10/metabolismo , Interleucina-6/metabolismo , Masculino , Regeneração Nervosa/genética , Ratos , Ratos Sprague-Dawley , Reação em Cadeia da Polimerase Via Transcriptase Reversa , Nervo Isquiático , Via de Sinalização Wnt/genética , Via de Sinalização Wnt/fisiologia
20.
Int J Food Sci Nutr ; 68(7): 849-864, 2017 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-28276900

RESUMO

The aim was to develop novel fibres by enzymatic synthesis, to determine their total dietary fibre by AOAC method 2009.01 and to estimate their potential digestibility and assess their digestibility in vivo using glycaemic and insulinaemic responses as markers in mice and randomised clinical trial models. We found that fibre candidates to which α-(1,2) branching was added were resistant to digestion in the mouse model, depending on the amount of branching. These results show that in vivo models are needed to reliably assess the digestibility of α-glycosidic-linked oligomeric dietary fibre candidates, possibly due to absence of brush border α-glucosidase activity in the current in vitro assessment. α-(1,3)-linked and α-(1,6)-linked glucose oligomers were completely digested in humans and mice. In conclusion, it is possible to develop dietary soluble fibres by enzymatic synthesis. Adding α-(1,2) branching increases their resistance to digestion in vivo and can thus improve their suitability as potential fibre candidates. Clinical Trial Registry: ClinicalTrials.gov, NCT02701270.


Assuntos
Fibras na Dieta/análise , Fibras na Dieta/metabolismo , Digestão/fisiologia , Adulto , Animais , Área Sob a Curva , Bactérias/metabolismo , Glicemia/efeitos dos fármacos , Glicemia/fisiologia , Cromatografia Líquida de Alta Pressão , Feminino , Humanos , Masculino , Camundongos , Pessoa de Meia-Idade
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA