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1.
Small ; 20(43): e2402481, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38953414

RESUMO

Superhydrophobic surfaces are of great interest because of their remarkable properties. Due to its maximal hardness and chemical inertness, diamond film has great potential in fabricating robust superhydrophobic surfaces. In the present study, an oxygen-terminated polycrystalline boron-doped diamond (O-PBDD) superhydrophobic surface with micro/nano-hierarchical porous structures is developed. The preparation method is very simple, requiring only sputtering and dewetting procedures. The former involves sputtering gold and copper particles onto the hydrogen-terminated polycrystalline boron-doped diamond (H-PBDD) to form gold/copper films, whereas the latter involves placing the samples in an atmospheric tube furnace to form hierarchical pores. By controlling the etching parameters, the wettability of the O-PBDD surface can be adjusted from hydrophilic to superhydrophobic, which is significantly different to the normal hydrophilicity feature of O-termination diamonds. The water contact angle of the obtained O-PBDD surface can reach 165 ± 5°, which is higher than the superhydrophobic diamond surfaces that are reported in the literature. In addition, the O-PBDD surface exhibits excellent durability; it can maintain satisfactory superhydrophobicity even after high-pressure, high-temperature, and sandpaper friction tests. This work provides a new research direction for fabricating robust superhydrophobic materials with diamond film.

2.
Cell Biol Toxicol ; 40(1): 14, 2024 02 20.
Artigo em Inglês | MEDLINE | ID: mdl-38376606

RESUMO

BACKGROUND: RING Finger Protein 115 (RNF115), a notable E3 ligase, is known to modulate tumorigenesis and metastasis. In our investigation, we endeavor to unravel the putative function and inherent mechanism through which RNF115 influences the evolution of thyroid carcinoma (THCA). METHODS: We analyzed RNF115 expression in THCA using the Cancer Genome Atlas (TCGA) database. The influence of RNF115 on the progression of THCA was evaluated using both in vitro and in vivo experimental approaches. The protein regulated by RNF115 was identified through bioinformatics analysis, and its biological significance was further explored. RESULTS: In both THCA tissues and cells, RNF115 showed elevated expression levels. Enhanced expression of RNF115 fostered cell proliferation, tumor growth, and the exacerbation of epithelial-mesenchymal transition (EMT) in THCA, while also promoting tumor lung metastasis. Bioinformatics analysis identified cyclin-dependent kinase 10 (CDK10) as a downstream target of RNF115, which was found to be ubiquitinated and degraded by RNF115 in THCA cells. Functionally, overexpression of CDK10 was found to counteract the promotion of malignant phenotype in THCA induced by RNF115. From a mechanistic perspective, RNF115 activated the Raf-1 pathway and enhanced cancer cell cycle progression by degrading CDK10 in THCA cells. CONCLUSION: RNF115 triggers cell proliferation, EMT, and tumor metastasis by ubiquitinating and degrading CDK10. The regulation of the Raf-1 pathway and cell cycle progression in THCA may be profoundly influenced by this process.


Assuntos
Neoplasias Pulmonares , Neoplasias da Glândula Tireoide , Ubiquitina-Proteína Ligases , Humanos , Carcinogênese/genética , Transformação Celular Neoplásica , Quinases Ciclina-Dependentes , Neoplasias da Glândula Tireoide/genética , Ubiquitina-Proteína Ligases/genética
3.
Arch Toxicol ; 98(9): 3049-3061, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-38879852

RESUMO

Valproic acid (VPA) is a primary medication for epilepsy, yet its hepatotoxicity consistently raises concerns among individuals. This study aims to establish an automated machine learning (autoML) model for forecasting the risk of abnormal increase of transaminase levels while undergoing VPA therapy for 1995 epilepsy patients. The study employed the two-tailed T test, Chi-square test, and binary logistic regression analysis, selecting six clinical parameters, including age, stature, leukocyte count, Total Bilirubin, oral dosage of VPA, and VPA concentration. These variables were used to build a risk prediction model using "H2O" autoML platform, achieving the best performance (AUC training = 0.855, AUC test = 0.789) in the training and testing data set. The model also exhibited robust accuracy (AUC valid = 0.742) in an external validation set, underscoring its credibility in anticipating VPA-induced transaminase abnormalities. The significance of the six variables was elucidated through importance ranking, partial dependence, and the TreeSHAP algorithm. This novel model offers enhanced versatility and explicability, rendering it suitable for clinicians seeking to refine parameter adjustments and address imbalanced data sets, thereby bolstering classification precision. To summarize, the personalized prediction model for VPA-treated epilepsy, established with an autoML model, displayed commendable predictive capability, furnishing clinicians with valuable insights for fostering pharmacovigilance.


Assuntos
Anticonvulsivantes , Epilepsia , Aprendizado de Máquina , Ácido Valproico , Humanos , Epilepsia/tratamento farmacológico , Anticonvulsivantes/efeitos adversos , Feminino , Masculino , Adulto , Adolescente , Pessoa de Meia-Idade , Adulto Jovem , Criança , Doença Hepática Induzida por Substâncias e Drogas/etiologia , Transaminases/sangue , Pré-Escolar , Idoso
4.
Postgrad Med J ; 100(1185): 461-468, 2024 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-38409767

RESUMO

BACKGROUND: Chronic inflammation has been connected by epidemiological evidence to coronary artery disease (CAD) along with myocardial infarction (MI). Nevertheless, it is still unclear whether reverse causality or confounders account for these connections. Our objectives are to examine the causality between inflammatory cytokines and CAD/MI as well as the potential mediating influence of lipid characteristics. METHODS: We acquired instrumental variables through genome-wide association studies meta-analyses of 41 inflammatory cytokines (8293 individuals). Genetic associations with CAD (122 733 cases and 424 528 controls), MI (~61 505 cases and 577 716 controls) and five candidate lipid mediators were obtained from the corresponding genome-wide association studies. A two-step, two-sample Mendelian randomization analysis was applied, followed with comprehensive sensitivity analyses. RESULTS: Genetically determined growth regulated oncogene-α was causally linked to a decreased incidence of CAD [odds ratio (OR), 0.97; 95% confidence interval (CI), 0.95-0.99; P = .007] and MI (OR, 0.95; 95% CI, 0.92-0.98; P = .002). There is suggestive evidence indicating a causal impact of macrophage inflammatory protein-1ß upon CAD (OR, 1.04; 95% CI, 1.01-1.07; P = .010) and MI (OR, 1.07; 95% CI, 1.02-1.11; P = .002). Furthermore, we discovered suggestive causal connections between tumor necrosis factor-related apoptosis-inducing ligand and CAD (OR, 0.97; 95% CI, 0.95-1.00; P = .020). Two-step Mendelian randomization analysis revealed that triglycerides partially mediate the effect of growth regulated oncogene-α on CAD (proportion-mediated: 13.28%) and MI (8.05%). CONCLUSIONS: We provided novel genetic evidence supporting the causality of inflammatory cytokines on CAD/MI and elucidate the mediating effect of triglycerides in the causal pathways linking inflammatory cytokines and CAD/MI.


Assuntos
Doença da Artéria Coronariana , Citocinas , Estudo de Associação Genômica Ampla , Análise da Randomização Mendeliana , Infarto do Miocárdio , Humanos , Doença da Artéria Coronariana/genética , Infarto do Miocárdio/genética , Citocinas/metabolismo , Citocinas/genética , Inflamação/genética , Predisposição Genética para Doença , Lipídeos/sangue , Polimorfismo de Nucleotídeo Único
5.
Sensors (Basel) ; 24(4)2024 Feb 14.
Artigo em Inglês | MEDLINE | ID: mdl-38400369

RESUMO

Amyloid plays a critical role in the pathogenesis of Alzheimer's disease (AD) and can aggregate to form oligomers and fibrils in the brain. There is increasing evidence that highly toxic amyloid-ß oligomers (AßOs) lead to tau protein aggregation, hyperphosphorylation, neuroinflammation, neuronal loss, synaptic loss, and dysfunction. Although the effects of AßOs on neurons have been investigated using conventional biochemical experiments, there are no established criteria for electrical evaluation. To this end, we explored electrophysiological changes in mouse hippocampal neurons (HT22) following exposure to AßOs and/or naringenin (Nar, a flavonoid compound) using electrical impedance spectroscopy (EIS). AßO-induced HT22 showed a decreased impedance amplitude and increased phase angle, and the addition of Nar reversed these changes. The characteristic frequency was markedly increased with AßO exposure, which was also reversed by Nar. The AßOs decreased intranuclear and cytoplasmic resistance and increased nucleus resistance and extracellular capacitance. Overall, the innovative construction of the eight-element CPE-equivalent circuit model further reflects that the pseudo-capacitance of the cell membrane and cell nucleus was increased in the AßO-induced group. This study conclusively revealed that AßOs induce cytotoxic effects by disrupting the resistance characteristics of unit membranes. The results further support that EIS is an effective technique for evaluating AßO-induced neuronal damage and microscopic electrical distinctions in the sub-microscopic structure of reactive cells.


Assuntos
Doença de Alzheimer , Peptídeos beta-Amiloides , Camundongos , Animais , Peptídeos beta-Amiloides/química , Impedância Elétrica , Doença de Alzheimer/patologia , Neurônios/metabolismo , Sinapses/metabolismo , Sinapses/patologia
6.
Molecules ; 29(14)2024 Jul 17.
Artigo em Inglês | MEDLINE | ID: mdl-39064938

RESUMO

Doxorubicin (DOX) has been an effective antitumor agent for human liver cancer cells; however, an overdose might lead to major side effects appearing in clinical applications. In this work, we present a strategy of combining DOX and blue light (BL) irradiation for the antitumor treatment of HepG2 cells (one typical human liver cancer cell line). It is demonstrated that synergetic DOX and BL can significantly reduce cell proliferation and increase the apoptotic rate of HepG2 cells in comparison to individual DOX treatment. The additional BL irradiation is further helpful for enhancing the inhibition of cell migration and invasion. Analyses of reactive oxygen species (ROS) level and Western blotting reveal that the strategy results in more ROS accumulation, mitochondrial damage, and the upregulation of proapoptotic protein (Bcl-2) and downregulation of antiapoptotic protein (Bax). In addition to the improved therapeutic effect, the non-contact BL irradiation is greatly helpful for reducing the dosage of DOX, and subsequently reduces the side effects caused by the DOX drug. These findings offer a novel perspective for the therapeutic approach toward liver cancer with high efficiency and reduced side effects.


Assuntos
Apoptose , Movimento Celular , Proliferação de Células , Doxorrubicina , Luz , Neoplasias Hepáticas , Espécies Reativas de Oxigênio , Doxorrubicina/farmacologia , Humanos , Células Hep G2 , Neoplasias Hepáticas/tratamento farmacológico , Neoplasias Hepáticas/radioterapia , Neoplasias Hepáticas/patologia , Neoplasias Hepáticas/metabolismo , Espécies Reativas de Oxigênio/metabolismo , Apoptose/efeitos dos fármacos , Apoptose/efeitos da radiação , Proliferação de Células/efeitos dos fármacos , Proliferação de Células/efeitos da radiação , Movimento Celular/efeitos dos fármacos , Movimento Celular/efeitos da radiação , Luz Azul
7.
Mol Genet Genomics ; 298(2): 473-483, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36639590

RESUMO

This study aimed to investigate the protective effects of PPARγ/CPT-1 regulation on cisplatin-induced cochlear hair cell injury. The viability, apoptosis and mitochondrial membrane potential of cisplatin-induced HEI-OC1 cells were determined by CCK-8 assay, TUNEL and JC-1 staining, respectively. The oxidative stress and lipid metabolism were detected by the assay kits of MDA, ROS, SOD, CAT, TG and FFA. The transfection efficiency of overexpression (OV)-PPARG and OV-CPT1A was examined by RT-qPCR and the expressions of apoptosis- and lipid metabolism-related proteins were detected by western blot. As a result, cisplatin with varying concentrations (5, 10, 30 µM) suppressed the viability, promoted the apoptosis and hindered the mitochondrial function of HEI-OC1 cells, accompanied with up-regulated expressions of Bax and cleaved caspase-3 and down-regulated expression of Bcl-2. The oxidative stress was aggravated and lipid metabolism was inhibited by cisplatin (5, 10, 30 µM) induction, evidenced by the increased levels of MDA, ROS, TG, FFA and the decreased levels of SOD and CAT. Overexpression of PPARG or CPT1A could improve the viability, mitochondrial function, lipid metabolism and suppress the oxidative stress and apoptosis of cisplatin-induced HEI-OC1 cells. In conclusion, up-regulation of PPARG or CPT1A ameliorated cochlear hair cell injury by improving cellular lipid metabolism and inhibiting oxidative stress.


Assuntos
Cisplatino , PPAR gama , Apoptose/genética , Cisplatino/farmacologia , Células Ciliadas Auditivas/metabolismo , Metabolismo dos Lipídeos/genética , Estresse Oxidativo/genética , PPAR gama/genética , PPAR gama/metabolismo , PPAR gama/farmacologia , Espécies Reativas de Oxigênio/metabolismo , Superóxido Dismutase/metabolismo , Superóxido Dismutase/farmacologia , Carnitina O-Palmitoiltransferase/metabolismo
8.
Phys Chem Chem Phys ; 25(36): 24518-24525, 2023 Sep 20.
Artigo em Inglês | MEDLINE | ID: mdl-37656439

RESUMO

In this work, the structural, electronic and mechanical properties of fluorinated diamane (F-diamane) with N and B dopants are systemically investigated using first-principles calculation. The N atom tends to stay in the external substituted site without F saturation, while the B-doped structure of the substituted external site with F saturation is the most stable. Ab initio molecular dynamics simulations confirm the thermal stability. The band structures of stable doped structures are similar to that of pristine F-diamane, due to the slight contribution of the dopant to the band edges. In addition, after the introduction of the B dopant, the formation energy reduces, and the transition barrier of graphene bilayers into diamane is smaller, indicating the feasibility of graphene bilayer fluoridation. Furthermore, we find that these doped structures have mechanical stability with isotropic elastic constants, Young's modulus, shear modulus and Poisson's ratio. Our work would promote the synthesis and development of two-dimensional diamane.

9.
Oral Dis ; 29(2): 469-482, 2023 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34085359

RESUMO

OBJECTIVES: Tongue squamous cell carcinoma (TSCC) is the most common malignancy in oral cancer. Long noncoding RNAs (lncRNAs) are important regulators in cancer biology. In our present study, we investigated a novel lncRNA IGF-like family member 2 antisense RNA 1 (IGFL2-AS1) in TSCC. METHODS: RT-qPCR analyzed IGFL2-AS1 expression in TSCC cells. Functional assays assessed the impact of IGFL2-AS1 on TSCC cell proliferation, migration, and invasion. Western blot analyzed the protein levels of EMT-related markers. Mechanism assays analyzed the regulatory mechanism of IGFL2-AS1 in TSCC cells. In-vivo experiments were conducted to prove the role of IGFL2-AS1 in TSCC progression. RESULTS: IGFL2-AS1 was significantly up-regulated in TSCC cells and tissues, and IGFL2-AS1 knockdown inhibited cell proliferation, migration, invasion and EMT in TSCC. Moreover, IGFL2-AS1 functioned as a competing endogenous RNA (ceRNA) to sponge miR-1224-5p and thereby modulated SATB homeobox 1 (SATB1) expression. Additionally, SATB1 activated the Wnt/ß-catenin signaling pathway in TSCC cells and IGFL2-AS1 regulated the Wnt/ß-catenin signaling pathway and TSCC progression via elevating SATB1 expression. CONCLUSIONS: The data revealed that IGFL2-AS1 played a cancer promoting role in TSCC and may aid in exploring a brand new biomarker that might contribute to TSCC treatment.


Assuntos
Carcinoma de Células Escamosas , Proteínas de Ligação à Região de Interação com a Matriz , MicroRNAs , RNA Longo não Codificante , Neoplasias da Língua , Humanos , Neoplasias da Língua/patologia , Carcinoma de Células Escamosas/patologia , Via de Sinalização Wnt/genética , Proteínas de Ligação à Região de Interação com a Matriz/genética , Proteínas de Ligação à Região de Interação com a Matriz/metabolismo , Linhagem Celular Tumoral , MicroRNAs/genética , MicroRNAs/metabolismo , Proliferação de Células/genética , Movimento Celular/genética , Língua , RNA Longo não Codificante/genética , Regulação Neoplásica da Expressão Gênica
10.
Nanotechnology ; 33(38)2022 Jun 28.
Artigo em Inglês | MEDLINE | ID: mdl-35609524

RESUMO

Polydopamine (PDA)-modified NaEr0.8Yb0.2 F4nanoparticles were synthesized, with strong NIR-II emission, quantum yield of 29.63%, and excellent photothermal performance. Crystal phases and microstructures are characterized. Optical properties such as absorption, NIR-II emission, and light stability are studied, and the luminescence mechanism is discussed in detail. Key factors in NIR-II imaging were evaluated in fresh pork tissue, including penetration depth, spatial resolution, and signal-to-noise ratio (SNR). A high penetration depth of 5 mm and a high spatial resolution of 1 mm were detected. Mice are imaged in vivo afterintravenousinjection. Due to the accumulation of nanoparticles in the liver, high image quality with an SNR of 5.2 was detected in the abdomen of KM mice with hair. The photothermal conversion effect of PDA-modified NPs was twice that of the reported material. These NIR-II nanoparticles have superior optical properties, high photothermal efficiency and low cytotoxicity, and are potential fluorescent probes for further disease diagnosis and treatment.


Assuntos
Nanopartículas , Polímeros , Animais , Corantes Fluorescentes/química , Indóis , Camundongos , Nanopartículas/química , Fototerapia , Polímeros/química
11.
J Bioenerg Biomembr ; 53(1): 85-96, 2021 02.
Artigo em Inglês | MEDLINE | ID: mdl-33420975

RESUMO

Kallikrein-associated peptidase 11 (KLK11) has emerged as a key tumor-associated protein that is implicated in a wide spectrum of tumor types. However, the detailed involvement of KLK11 in laryngeal squamous cell carcinoma (LSCC) has not been well studied. The aims of our work were to evaluate whether KLK11 plays a role in LSCC. We found that both the mRNA and protein expression of KLK11 were significantly lower in LSCC tissues than in normal tissues. Low expression of KLK11 was also observed in LSCC cell lines, and the up-regulation of KLK11 caused a significant inhibitory effect on the proliferation, colony formation and invasion of LSCC cells. On the contrary, the knockdown of KLK11 markedly accelerated the proliferative and invasive abilities of LSCC cells. Molecular mechanism research revealed that KLK11 overexpression decreased the phosphorylation of glycogen synthase kinase-3ß (GSK-3ß) and down-regulated the expression of active ß-catenin, leading to the inactivation of Wnt/ß-catenin signaling in LSCC cells. Furthermore, GSK-3ß inhibition markedly abrogated the KLK11-mediated suppressive effect on Wnt/ß-catenin signaling. Notably, the reactivation of Wnt/ß-catenin partially reversed KLK11-mediated tumor-inhibition effect in LSCC. In addition, the xenograft tumor assay demonstrated that the up-regulation of KLK11 retarded tumor formation and the growth of LSCC cells in vivo. Taken together, the findings of our work demonstrate that KLK11 exerts a tumor-inhibition role in LSCC by down-regulating Wnt/ß-catenin signaling. Our work highlights a pivotal role of KLK11 in LSCC progression and suggests it as an attractive anticancer target for LSCC treatment.


Assuntos
Neoplasias de Cabeça e Pescoço/metabolismo , Proteínas Proto-Oncogênicas c-akt/metabolismo , Serina Endopeptidases/metabolismo , Carcinoma de Células Escamosas de Cabeça e Pescoço/metabolismo , Via de Sinalização Wnt , beta Catenina/metabolismo , Animais , Neoplasias de Cabeça e Pescoço/genética , Neoplasias de Cabeça e Pescoço/patologia , Xenoenxertos , Humanos , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Camundongos Nus , Carcinoma de Células Escamosas de Cabeça e Pescoço/genética , Carcinoma de Células Escamosas de Cabeça e Pescoço/patologia
12.
J Bioenerg Biomembr ; 53(2): 235-245, 2021 04.
Artigo em Inglês | MEDLINE | ID: mdl-33604734

RESUMO

Long non-coding RNA (lncRNA) AGAP2-AS1 acts as an oncogene in several types of cancers. However, the role and mechanism of AGAP2-AS1 in papillary thyroid carcinoma (PTC) remain unclear. Thus, in this study, we aimed to explore the role of AGAP2-AS1 in PTC. Our results showed that AGAP2-AS1 was significantly upregulated in PTC tissues. Knockdown of AGAP2-AS1 inhibited the proliferation, migration and invasion of PTC cells. In vivo experiment showed that AGAP2-AS1 knockdown inhibited the tumorigenesis of PTC. MiR-628-5p was found to act as a target miRNA of AGAP2-AS1 in PTC. The expression level of miR-628-5p in PTC tissues was negatively associated with that of AGAP2-AS1. Inhibition of miR-628-5p attenuated the effects of AGAP2-AS1 knockdown on PTC. Moreover, miR-628-5p directly bound to the 3'UTR of KLF12 and inhibited the expression of KLF12. Knockdown of KLF12 enhanced the inhibitory effects of miR-628-5p on PTC cell proliferation and metastasis. In conclusion, these findings indicated that AGAP2-AS1 exerted an oncogenic role in PTC progression and metastasis. The effects of AGAP2-AS1 might be mediated by the regulation of miR-628-5p/KLF12 axis.


Assuntos
MicroRNAs/metabolismo , RNA Longo não Codificante/genética , Câncer Papilífero da Tireoide/genética , Neoplasias da Glândula Tireoide/genética , Animais , Linhagem Celular Tumoral , Proliferação de Células , Humanos , Fatores de Transcrição Kruppel-Like/metabolismo , Camundongos , Transdução de Sinais , Câncer Papilífero da Tireoide/patologia , Neoplasias da Glândula Tireoide/patologia
13.
Int J Clin Oncol ; 25(4): 660-669, 2020 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-31832883

RESUMO

BACKGROUND: Head and neck squamous cell carcinomas (HNSCCs) are one of the most common cancers in the world, and nucleotide excision repair (NER) is involved in HNSCCs susceptibility. We investigated whether mRNA expression levels of nine core NER genes were associated with risk of HNSCCs in a Chinese population. METHODS: In this study of 251 HNSCC patients and 232 healthy controls, we quantified NER gene mRNA expression levels in cultured peripheral lymphocytes using a quantitative real-time PCR. RESULTS: Compared with the controls, HNSCC patients had statistically significantly lower expression levels of XPA and XPB (P = 0.029 and 0.001, respectively). After dividing the subjects by the controls' median values of expression levels, we found a dose-dependent association between an increased risk of HNSCCs and low expression levels of XPB (adjusted OR 1.56 and 95% CI 1.07-2.28; Ptrend = 0.001). We also identified a significant multiplicative interaction between smoking status as well as alcohol status and mRNA expression levels of XPB (P = 0.014 and 0.042, respectively). Finally, after integrating demographic variables, we found the addition of smoking status and XPB expression levels to the model significantly improved the sensitivity of the expanded model on HNSCC risk. CONCLUSION: Reduced mRNA expression levels of XPB were associated with an increased risk of HNSCCs in a Chinese population.


Assuntos
DNA Helicases/genética , Reparo do DNA/genética , Proteínas de Ligação a DNA/genética , Neoplasias de Cabeça e Pescoço/genética , Linfócitos/fisiologia , Carcinoma de Células Escamosas de Cabeça e Pescoço/genética , Adulto , Idoso , Idoso de 80 Anos ou mais , Povo Asiático , Estudos de Casos e Controles , Feminino , Regulação Neoplásica da Expressão Gênica , Predisposição Genética para Doença , Humanos , Masculino , Pessoa de Meia-Idade , RNA Mensageiro
14.
World J Surg Oncol ; 18(1): 84, 2020 May 02.
Artigo em Inglês | MEDLINE | ID: mdl-32359365

RESUMO

BACKGROUND: Parathyroid protection and central neck dissection (CND) are basic points of thyroid cancer surgery and draw persistent concern. We aimed to evaluate the value of carbon nanoparticles (CNs) for parathyroid gland protection and CND in thyroid surgery for thyroid cancer patients. METHODS: A total of 386 consecutive thyroid cancer patients were enrolled in the retrospective study. Three hundred thirty-four patients using CNs intraoperatively were included in the CN group, and 52 patients without using CNs or any other helping agent were included in the control group. Intact parathyroid hormone (iPTH) was examined. Medical records and histopathologic reports were reviewed. Histopathologic examination was performed. RESULTS: There were no statistical significances in demographic and basic surgical information, preoperative iPTH, and serum calcium between the two groups (P > 0.05). In the CN group, the thyroid tissue and central neck lymph nodes were stained black by CNs, while the parathyroid glands were not. Histopathological examination showed that the carbon nanoparticles might accumulated in the subcapsular sinus of lymph nodes compared with the none-stained samples. The staining with CNs did not impact the histopathological examination. There were no significant differences in postoperative hypocalcemia and hypoPT at day 1, 1 month, and half year after surgery between the two groups, respectively. There was a big decline of iPTH level after surgery, whereas the perioperative decreasing amplitude of PTH was not statistically different between the CNs and control group (57.2 ± 28.6 vs 55.7 ± 27.8, P = 0.710). There were 43 patients occurring incidental parathyroidectomy in the CN group (43/334, 12.9%) and 7 patients in the control group (7/52, 13.5%), without significant difference (P = 0.907). There was no significant difference in the number of lymph nodes identified by pathology per patient between the CNs and control group regardless of unilateral and bilateral CND. CONCLUSIONS: Carbon nanoparticles help highlight parathyroid glands and lymph nodes in thyroidectomy, but generate no significant benefit for parathyroid glands protection and lymph node dissection. The value of carbon nanoparticles in thyroid cancer surgery should not be exaggerated and needs further evaluation.


Assuntos
Cuidados Intraoperatórios/métodos , Esvaziamento Cervical/efeitos adversos , Coloração e Rotulagem/métodos , Neoplasias da Glândula Tireoide/cirurgia , Tireoidectomia/métodos , Adulto , Carbono/administração & dosagem , Corantes/administração & dosagem , Estudos de Viabilidade , Feminino , Humanos , Complicações Intraoperatórias/etiologia , Complicações Intraoperatórias/prevenção & controle , Linfonodos/cirurgia , Masculino , Pessoa de Meia-Idade , Nanopartículas/administração & dosagem , Esvaziamento Cervical/métodos , Glândulas Paratireoides/lesões , Prognóstico , Estudos Retrospectivos , Tireoidectomia/efeitos adversos
15.
BMC Surg ; 20(1): 4, 2020 Jan 06.
Artigo em Inglês | MEDLINE | ID: mdl-31907042

RESUMO

BACKGROUND: To evaluate the efficacy of a sensitive, real-time tool for identification and protection for parathyroid glands during thyroidectomy. METHODS: Near-infrared (NIR) auto-fluorescence was measured intraoperatively from 20 patients undergoing thyroidectomy. Spectra were measured from suspicious parathyroid glands and surrounding neck tissues during the operation with a NIR fluorescence system. Fast frozen sections were performed on the suspicious parathyroid glands. Accuracy was evaluated by comparison with histology and NIR identification. Data were attracted for Fisher's linear discriminant analysis. RESULTS: The auto-fluorescence intensity of parathyroid was significantly higher than that of thyroid, fat and lymph node. The peak intensity of auto-fluorescence from parathyroid was 5.55 times of that from thyroid at the corresponding wave number. Of the 20 patients, the parathyroid was accurately detected and identified in 19 patients by NIR system, compared with their histologic results. One suspicious parathyroid did not exhibit typical spectra, and was proved to be fat tissue by histology. The NIR auto-fluorescence method had a 100% sensitivity of parathyroid glands identification and a high accuracy of 95%. The positive predictive value was 95%. The parathyroid gland have specific auto-fluorescence spectrum and can be separated from the other three samples through the Fisher's linear discriminant analysis. CONCLUSIONS: NIR auto-fluorescence spectroscopy can accurately identify normal parathyroid gland during thyroidectomy. The Fisher's linear discriminant analysis demonstrated the specificity of the NIR auto-fluorescence of parathyroid tissue and its efficacy in parathyroid discrimination.


Assuntos
Glândulas Paratireoides/diagnóstico por imagem , Espectrometria de Fluorescência/métodos , Espectroscopia de Luz Próxima ao Infravermelho/métodos , Cirurgia Assistida por Computador/métodos , Glândula Tireoide/cirurgia , Neoplasias da Glândula Tireoide/cirurgia , Tireoidectomia/métodos , Adulto , Idoso , Análise Discriminante , Feminino , Humanos , Período Intraoperatório , Masculino , Pessoa de Meia-Idade , Curva ROC , Neoplasias da Glândula Tireoide/diagnóstico
16.
Opt Express ; 27(23): 34454-34462, 2019 Nov 11.
Artigo em Inglês | MEDLINE | ID: mdl-31878492

RESUMO

ZnO nanocavities have advantage to working as optoelectrical nanodevices integrated on chip at high temperature owing to high exciton binding energy. In this work, a single inverted hexagonal ZnO pyramid (HZOP) nanolaser is fabricated successfully by reducing the defect with chemical vapor deposition (CVD). The optical leakage of HZOP is conquered by the inverted configuration to increase the refractive index contrast between ZnO pyramid and surrounding media. Helical whispering-gallery-like mode is proposed to dominate the lasing of HZOP nanolaser. All of the lasing peaks are found to exist at wavelength longer to the fluorescence emission of ZnO, which is ascribed to the large loss represented by the large imaginary part of ZnO refractive index at shorter wavelength. The threshold and linewidth are measured to be 5.27 mJ/cm2 and 0.27 nm, respectively. HZOP nanolaser is a new ultraviolet coherent light source to be integrated on chip at room temperature or higher temperature.

18.
Int J Mol Sci ; 19(5)2018 May 15.
Artigo em Inglês | MEDLINE | ID: mdl-29762467

RESUMO

The cell viability and apoptosis of tumor U937 cells treated by blue light (BL) irradiation have been examined. BL irradiation can specially inhibit the proliferation and promote the apoptosis of U937 cells, relating to the production of reactive oxygen species (ROS) and the decline of mitochondrial membrane potential (ΔΨm). The apoptosis is further associated with varying downregulated B-cell lymphoma-extra large (Bcl-XL) and B-cell lymphoma 2 (Bcl-2) genes, upregulated Bcl-2-associated X (Bax) gene, the activation of caspase-3 and caspase-9, and the cleavage of poly (ADP-ribose) polymerase (PARP) by the BL irradiation process. Moreover, BL irradiation induced proliferation inhibition is higher than that treated by a common chemotherapeutic drug of homoharringtonine (HHT). When we synergize BL irradiation with HHT (BL-HHT), a higher proliferation inhibition is obtained than that treated by BL irradiation or HHT alone. These results are helpful for establishing a low toxicity and high efficiency strategy of BL irradiation for clinical treatment of acute myeloid leukemia, not limited to U937 cells.


Assuntos
Antineoplásicos Fitogênicos/farmacologia , Proliferação de Células/efeitos da radiação , Harringtoninas/farmacologia , Luz , Apoptose/efeitos dos fármacos , Apoptose/efeitos da radiação , Caspases/genética , Caspases/metabolismo , Linhagem Celular Tumoral , Proliferação de Células/efeitos dos fármacos , Mepesuccinato de Omacetaxina , Humanos , Potencial da Membrana Mitocondrial , Poli(ADP-Ribose) Polimerases/genética , Poli(ADP-Ribose) Polimerases/metabolismo , Proteínas Proto-Oncogênicas c-bcl-2/genética , Proteínas Proto-Oncogênicas c-bcl-2/metabolismo , Proteína X Associada a bcl-2/genética , Proteína X Associada a bcl-2/metabolismo , Proteína bcl-X/metabolismo
19.
Tumour Biol ; 37(9): 12141-12151, 2016 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-27220320

RESUMO

MicroRNAs have been documented playing key roles in cancer development and progression. Here, we investigate the role of miR-125b in gastric cancer metastasis. We found that the expression of miR-125b was up-regulated in gastric cancer tissue specimens compared with their corresponding nontumorous tissues, and the up-regulated miR-125b level was significantly associated with TNM stage and lymph node-metastasis. Overexpression of miR-125b promoted gastric cancer cell migration and invasion in vitro and metastasis in vivo. STARD13 and NEU1 were identified as direct target genes of miR-125b by luciferase assays, and they were involved in the cell migration and invasion regulated by miR-125b in gastric cancer. Taken together, miR-125b functions as an oncogene in gastric cancer and represents a new potential therapeutic target for gastric cancer.


Assuntos
MicroRNAs/fisiologia , Neuraminidase/genética , Neoplasias Gástricas/patologia , Proteínas Supressoras de Tumor/genética , Adulto , Animais , Linhagem Celular Tumoral , Movimento Celular , Feminino , Proteínas Ativadoras de GTPase , Humanos , Masculino , Camundongos , Camundongos Endogâmicos BALB C , Pessoa de Meia-Idade , Invasividade Neoplásica , Metástase Neoplásica , Estadiamento de Neoplasias
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