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1.
Langenbecks Arch Surg ; 409(1): 96, 2024 Mar 14.
Artigo em Inglês | MEDLINE | ID: mdl-38483607

RESUMO

PURPOSE: The purpose of this study was to investigate the impact of autofluorescence technology on postoperative parathyroid function and short-term outcomes in patients undergoing thyroid surgery. METHODS: A total of 546 patients were included in the study, with 287 in the conventional treatment group and 259 in the autofluorescence group. Both groups underwent central lymph node dissection, which is known to affect parathyroid function. Short-term outcomes, including rates of postoperative hypocalcemia and parathyroid dysfunction, serum calcium and PTH levels on the first postoperative day, as well as the need for calcium supplementation, were analyzed. A multivariable analysis was also conducted to assess the impact of autofluorescence on postoperative parathyroid dysfunction, considering factors such as age, BMI, and preoperative calcium levels. RESULTS: The autofluorescence group demonstrated significantly lower rates of postoperative hypocalcemia and parathyroid dysfunction compared to the conventional treatment group. The autofluorescence group also had better serum calcium and PTH levels on the first postoperative day, and a reduced need for calcium supplementation. Surprisingly, the use of autofluorescence technology did not prolong surgical time; instead, it led to a shorter hospitalization duration. The multivariable analysis showed that autofluorescence significantly reduced the risk of postoperative parathyroid dysfunction, while factors such as age, BMI, and preoperative calcium levels did not show a significant correlation. CONCLUSION: This study provides evidence that autofluorescence technology can improve the preservation of parathyroid function during thyroid surgery, leading to better short-term outcomes and reduced postoperative complications. The findings highlight the potential of autofluorescence as a valuable tool in the management of parathyroid hypofunction. Further research and validation are needed to establish the routine use of autofluorescence technology in the thyroid.


Assuntos
Hipocalcemia , Hipoparatireoidismo , Neoplasias da Glândula Tireoide , Humanos , Hipocalcemia/etiologia , Hipocalcemia/prevenção & controle , Hormônio Paratireóideo , Hipoparatireoidismo/etiologia , Hipoparatireoidismo/prevenção & controle , Cálcio , Tireoidectomia/efeitos adversos , Neoplasias da Glândula Tireoide/cirurgia , Glândulas Paratireoides/cirurgia , Complicações Pós-Operatórias/etiologia
2.
J Transl Med ; 22(1): 201, 2024 Feb 24.
Artigo em Inglês | MEDLINE | ID: mdl-38402159

RESUMO

BACKGROUND: Although the long-term prognosis of papillary thyroid cancer (PTC) is favorable, distant metastasis significantly compromises the prognosis and quality of life for patients with PTC. The Cadherin family plays a pivotal role in tumor metastasis; however, the involvement of Cadherin 4 (CDH4) in the metastatic cascade remains elusive. METHODS: The expression and subcellular localization of CDH4 were determined through immunohistochemistry, immunofluorescence, and western blot analyses. The impact of CDH4 on cell migration, invasion, angiogenesis, and metastasis was assessed using transwell assays, tube formation assays, and animal experiments. Immunoprecipitation assay and mass spectrometry were employed to examine protein associations. The influence of CDH4 on the subcellular expression of ß-catenin and active ß-catenin was investigated via western blotting and immunofluorescence. Protein stability and ubiquitination assay were employed to verify the impact of CDH4 on ß-catenin degradation. Rescue experiments were performed to ensure the significance of CDH4 in regulating nuclear ß-catenin signaling. RESULTS: CDH4 was found to be significantly overexpressed in PTC tissues and predominantly localized in the cytoplasm. Furthermore, the overexpression of CDH4 in tumor tissues is associated with lymph node metastasis in PTC patients. Cytosolic CDH4 promoted the migration, invasion, and lung metastasis of PTC cells and stimulated the angiogenesis and tumorigenesis of PTC; however, this effect could be reversed by Tegavivint, an antagonist of ß-catenin. Mechanistically, cytosolic CDH4 disrupted the interaction between ß-catenin and ß-TrCP1, consequently impeding the ubiquitination process of ß-catenin and activating the nuclear ß-catenin signaling. CONCLUSIONS: CDH4 induces PTC angiogenesis and metastasis via the inhibition of ß-TrCP1-dependent ubiquitination of ß-Catenin.


Assuntos
Carcinoma Papilar , Neoplasias da Glândula Tireoide , Animais , Humanos , 60489 , beta Catenina/metabolismo , Caderinas/metabolismo , Carcinoma Papilar/patologia , Linhagem Celular Tumoral , Movimento Celular , Proliferação de Células , Qualidade de Vida , Câncer Papilífero da Tireoide/patologia , Neoplasias da Glândula Tireoide/patologia , Ubiquitinação , Via de Sinalização Wnt
4.
Nat Commun ; 15(1): 1467, 2024 Feb 17.
Artigo em Inglês | MEDLINE | ID: mdl-38368411

RESUMO

The noncentrosymmetric ferromagnetic Weyl semimetal CeAlSi with simultaneous space-inversion and time-reversal symmetry breaking provides a unique platform for exploring novel topological states. Here, by employing multiple experimental techniques, we demonstrate that ferromagnetism and pressure can serve as efficient parameters to tune the positions of Weyl nodes in CeAlSi. At ambient pressure, a magnetism-facilitated anomalous Hall/Nernst effect (AHE/ANE) is uncovered. Angle-resolved photoemission spectroscopy (ARPES) measurements demonstrated that the Weyl nodes with opposite chirality are moving away from each other upon entering the ferromagnetic phase. Under pressure, by tracing the pressure evolution of AHE and band structure, we demonstrate that pressure could also serve as a pivotal knob to tune the positions of Weyl nodes. Moreover, multiple pressure-induced phase transitions are also revealed. These findings indicate that CeAlSi provides a unique and tunable platform for exploring exotic topological physics and electron correlations, as well as catering to potential applications, such as spintronics.

5.
Aging (Albany NY) ; 16(2): 1318-1335, 2024 Jan 17.
Artigo em Inglês | MEDLINE | ID: mdl-38240701

RESUMO

BACKGROUND: The current study aimed to investigate the molecular mechanism of long non-coding RNA (lncRNA) MEG3 in the development of breast cancer. METHODS: The regulating relationships among lncRNA MEG3, miRNA-330 and CNN1 were predicted by bioinformatics analysis of breast cancer samples in the Cancer Genome Atlas database. The differential expression of lncRNA MEG3, miRNA-330 and CNN1 was first validated in breast cancer tissues and cells. The effects of lncRNA MEG3 on breast cancer malignant properties were evaluated by manipulating its expression in MCF-7 and BT-474 cells. Rescue experiments, dual-luciferase assays, and RNA immunoprecipitation (RIP) experiments were further used to validate the relationships among lncRNA MEG3, miRNA-330 and CNN1. RESULTS: Bioinformatics analysis showed that lncRNA MEGs and CNN1 were significantly downregulated in breast cancer tissues, while miR-330 was upregulated. These differential expressions were further validated in our cohort of breast cancer samples. High expression levels of lncRNA MEG3 and CNN1 as well as low expression of miR-330 were significantly associated with favorable overall survival. Overexpression of lncRNA MEG3 significantly inhibited cell viability, migration and invasion, decreased cells in S stage and promoted cell apoptosis. Dual-luciferase reporter gene assay and RIP experiments showed that lncRNA MEG3 could directly bind to miR-330. Moreover, miR-330 mimics on the basis of lncRNA MEG3 overexpression ameliorated the tumor-suppressing effects of lncRNA MEG3 in breast cancer malignant properties by decreasing CNN1 expression. CONCLUSION: Our study indicated lncRNA MEG3 is a breast cancer suppressor by regulating miR-330/CNN1 axis.


Assuntos
Neoplasias da Mama , MicroRNAs , RNA Longo não Codificante , Humanos , Feminino , RNA Longo não Codificante/genética , RNA Longo não Codificante/metabolismo , Linhagem Celular Tumoral , Neoplasias da Mama/genética , Proliferação de Células/genética , MicroRNAs/genética , MicroRNAs/metabolismo , Luciferases
6.
Endocrine ; 2023 Oct 10.
Artigo em Inglês | MEDLINE | ID: mdl-37815746

RESUMO

PURPOSE: Sex hormones are thought to be responsible for the unique gender differences in papillary thyroid cancer(PTC). Most previous studies on these have focused on the expression of estrogen receptors, or have been limited to animal studies. The aim of our study was to explore the relationship between serum sex hormones and the pathological features of PTC in the clinical setting, as further evidence of the role of sex hormones in PTC. METHODS: Retrospective data analysis of patients who underwent thyroid surgery at the Department of Thyroid Surgery, Nanjing Drum Tower Hospital from January 2022 to September 2022 Correlation between serum sex hormone and pathological features was analyzed in male patients and in menopausal female patients. Serum sex hormones include luteinizing hormone(LH), follicle stimulating hormone(FSH), estradiol(E2), total testosterone(TT), progesterone(P), and prolactin(PRL). Tumor pathological characteristics include the number and size of tumor, presence of extrathyroidal extension(ETE), presence of lymph node metastasis(LNM). RESULTS: Preoperative serum E2 in male patients was positively correlated with tumor size in PTC, LH was negatively correlated with LNM, while TT and P were negatively correlated with ETE. Similar findings were not observed in menopausal female patients. CONCLUSION: We observed that serum sex hormones correlate with the pathological features of PTC in male patients, for the first time in a clinical study. High serum estrogens may be a risk factor for PTC, while androgens are the opposite. This somewhat corroborates previous research and provides new variables for future PTC prediction models.

7.
J Cancer Res Clin Oncol ; 149(17): 16001-16013, 2023 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-37689588

RESUMO

BACKGROUND: Anaplastic thyroid cancer (ATC) is a highly aggressive malignancy with dismal prognosis. This study aimed to identify the independent risk factors and construct a readily-to-use nomogram to predict the probability of early death in ATC patients. METHOD: Patients diagnosed with ATC between 2004 and 2015 from the Surveillance, Epidemiology, and End Results (SEER) database were enrolled in this study for model development and internal validation. Univariate and multivariate logistic regression analyses were conducted to identify independent risk factors for early death of ATC. Nomograms for predicting the probability of all-cause early death (ACED) and cancer-specific early death (CSED) of ATC were subsequently developed. The performance of the nomograms was comprehensively evaluated and validated in an internal cohort. RESULT: A total of 696 ATC patients were included in this study, of which 488 patients in the training cohort and 208 patients in the validation cohort. The univariate and multivariate logistic regression analyses identified five independent factors (tumor size, M stage, surgery, radiotherapy and chemotherapy) in the ACED model and six variables in the CSED (gender, tumor size, M stage, surgery, radiotherapy and chemotherapy) model for the establishment of the nomograms. Calibration curves and receiver operating characteristic (ROC) curves showed satisfactory efficacy and consistency both in the training (ACED: AUC values: 0.814 (0.776-0.852); CSED: 0.778 (0.736-0.820)) and validation sets (ACED: 0.762 (0.696-0.827); CSED: 0.745 (0.678-0.812)). In addition, the decision curve analysis (DCA) demonstrated the favorable potential of the two nomograms in clinical application. CONCLUSION: The two nomograms assist clinicians to identify risk factors and predict the early death probability among ATC patients, thus guide individualized treatment to improve the prognosis.


Assuntos
Carcinoma Anaplásico da Tireoide , Neoplasias da Glândula Tireoide , Humanos , Nomogramas , Calibragem , Divisão Celular , Neoplasias da Glândula Tireoide/diagnóstico , Neoplasias da Glândula Tireoide/epidemiologia , Neoplasias da Glândula Tireoide/terapia , Programa de SEER , Prognóstico
8.
Nanomedicine ; 48: 102641, 2023 02.
Artigo em Inglês | MEDLINE | ID: mdl-36549554

RESUMO

Epithelial-mesenchymal transition (EMT) is the culprit of tumor invasion and metastasis. As a critical transcription factor that induces EMT, snail is of great importance in tumor progression, and knocking down its expression by small interfering RNA (siRNA) may inhibit tumor metastasis. Herein, we developed a core-shelled bioinspired low-density lipoprotein (bio-LDL) in which snail siRNA-loaded calcium phosphate nanoparticles were wrapped as the core and doxorubicin was embedded in the outer phospholipids modified with a synthetic peptide of apoB100 targeting LDL receptor-abundant tumor cells. Bio-LDL exhibited pH-responsive release, lysosomal escape ability, enhanced cytotoxicity and apoptotic induction. Bio-LDL could significantly inhibit the expression of snail and regulate EMT-related proteins to reduce tumor migration and invasion in vitro. Bio-LDL also displayed favorable tumor targeting and synergistic inhibition of tumor growth and metastasis in vivo. Therefore, the multifunctional bio-LDL will be a promising co-delivery vector and holds potential value for clinical translation.


Assuntos
Lipoproteínas LDL , Neoplasias , Humanos , Doxorrubicina/farmacologia , Neoplasias/tratamento farmacológico , Morte Celular , RNA Interferente Pequeno , Linhagem Celular Tumoral , Transição Epitelial-Mesenquimal
9.
J Clin Lab Anal ; 36(12): e24754, 2022 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-36336884

RESUMO

BACKGROUND: Emerging studies have demonstrated the critical role of RNA m6A methylation in tumor progression, whereas lncRNA m6A modification profiles in breast cancer remain largely unknown. Our previous study has shown that METTL14 accelerates breast cancer migration and invasion in an m6A-dependent manner, making it critical to analyze METTL14-mediated m6A modification at a transcriptome-wide scale in breast cancer. METHODS: Here, we performed MeRIP-seq analysis in METTL14 overexpressed and control MDA-MB-231 cells. Conjoint analysis of MeRIP-seq and RNA-seq data was used to select lncRNAs with m6A methylation and differential expression. Finally, the screened lncRNA was verified by MeRIP-PCR and its function was studied via transwell assay. RESULTS: Our results determined that high expression of METLL14 results in 3996 hypermethylation peaks from 3107 transcripts, and 4100 hypomethylation peaks from 2918 transcripts. Furthermore, conjoint analysis of MeRIP-seq and RNA-seq data identified 25 lncRNAs with discrepant methylation and simultaneously discrepant expression, among which the top 10 differentially expressed LncRNAs were AC026401.3, CYTOR, LINC01943, AC084125.2, FLJ20021, LINC00472, and NORAD, MALAT1, AL161431.1, and LINC01764. Moreover, over-expressed METTL14 stimulated the m6A modification of AC084125.2, while decreasing its expression. Compared to adjacent tissues, AC084125.2 was lowly expressed in tumors and could be used as a biomarker in the diagnosis of breast cancer. Meanwhile, AC084125.2 inhibited the migration and invasion of cancer cells. CONCLUSION: In conclusion, METTL14-mediated m6A modification of lncRNAs, which might provide reference for future intervention in tumor progression.


Assuntos
Neoplasias da Mama , RNA Longo não Codificante , Humanos , Feminino , RNA Longo não Codificante/genética , Transcriptoma/genética , Neoplasias da Mama/genética , Reação em Cadeia da Polimerase , Bioensaio , Metiltransferases/genética
10.
Front Endocrinol (Lausanne) ; 13: 938008, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-36133306

RESUMO

Thyroid nodules (TNs) represent a common scenario. More accurate pre-operative diagnosis of malignancy has become an overriding concern. This study incorporated demographic, serological, ultrasound, and biopsy data and aimed to compare a new diagnostic prediction model based on Back Propagation Neural Network (BPNN) with multivariate logistic regression model, to guide the decision of surgery. Records of 2,090 patients with TNs who underwent thyroid surgery were retrospectively reviewed. Multivariate logistic regression analysis indicated that Bethesda category (OR=1.90, P<0.001), TIRADS (OR=2.55, P<0.001), age (OR=0.97, P=0.002), nodule size (OR=0.53, P<0.001), and serum levels of Tg (OR=0.994, P=0.004) and HDL-C (OR=0.23, P=0.001) were statistically significant independent differentiators for patients with PTC and benign nodules. Both BPNN and regression models showed good accuracy in differentiating PTC from benign nodules (area under the curve [AUC], 0.948 and 0.924, respectively). Notably, the BPNN model showed a higher specificity (88.3% vs. 73.9%) and negative predictive value (83.7% vs. 45.8%) than the regression model, while the sensitivity (93.1% vs. 93.9%) was similar between two models. Stratified analysis based on Bethesda indeterminate cytology categories showed similar findings. Therefore, BPNN and regression models based on a combination of demographic, serological, ultrasound, and biopsy data, all of which were readily available in routine clinical practice, might help guide the decision of surgery for TNs.


Assuntos
Neoplasias da Glândula Tireoide , Nódulo da Glândula Tireoide , Humanos , Biópsia por Agulha Fina , Estudos Retrospectivos , Fatores de Risco , Câncer Papilífero da Tireoide/diagnóstico , Câncer Papilífero da Tireoide/cirurgia , Neoplasias da Glândula Tireoide/diagnóstico , Neoplasias da Glândula Tireoide/patologia , Neoplasias da Glândula Tireoide/cirurgia , Nódulo da Glândula Tireoide/diagnóstico , Nódulo da Glândula Tireoide/patologia , Nódulo da Glândula Tireoide/cirurgia
11.
Nat Commun ; 12(1): 6970, 2021 Nov 30.
Artigo em Inglês | MEDLINE | ID: mdl-34848690

RESUMO

The nature of the interaction between magnetism and topology in magnetic topological semimetals remains mysterious, but may be expected to lead to a variety of novel physics. We systematically studied the magnetic semimetal EuAs3, demonstrating a magnetism-induced topological transition from a topological nodal-line semimetal in the paramagnetic or the spin-polarized state to a topological massive Dirac metal in the antiferromagnetic ground state at low temperature. The topological nature in the antiferromagnetic state and the spin-polarized state has been verified by electrical transport measurements. An unsaturated and extremely large magnetoresistance of ~2 × 105% at 1.8 K and 28.3 T is observed. In the paramagnetic states, the topological nodal-line structure at the Y point is proven by angle-resolved photoemission spectroscopy. Moreover, a temperature-induced Lifshitz transition accompanied by the emergence of a new band below 3 K is revealed. These results indicate that magnetic EuAs3 provides a rich platform to explore exotic physics arising from the interaction of magnetism with topology.

12.
Bioengineered ; 12(2): 12236-12245, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34783641

RESUMO

We aimed to evaluate the effects of long-chain non-coding RNA (lncRNA) anti-differentiation non-coding RNA (ANCR) on the proliferation, invasion, and migration of breast cancer cells by targeting miR-331. Forty-eight breast cancer and paracancerous tissue samples were collected. LncRNA ANCR expressions in breast cancer and adjacent tissues, human breast cancer cells and mammary epithelial cells, and miR-331 expressions in interfering cell line MDA-MB-231 (MCF-7)-shANCR, negative control MDA-MB-231 (MCF-7)-shNC and blank control MDA-MB-231 (MCF-7) were detected by real-time quantitative PCR. The correlations between lncRNA ANCR expression and clinicopathological characteristics were analyzed. Cell proliferation was detected by MTT and colony formation assays. Invasion and migration were tested by Transwell and scratch assays, respectively. The targeting relationship between ANCR and miR-331 was analyzed using the TargetScan database, and their interaction was studied using a dual-luciferase reporter assay. The expression of lncRNA ANCR in breast cancer tissue was significantly lower than that in adjacent normal tissue (p < 0.05). LncRNA ANCR was lowly expressed in various human breast cancer cell lines, being lowest in high-metastatic cell line (MDA-MB-231HM) (p < 0.05). Silencing lncRNA ANCR significantly enhanced the proliferation and invasion capacities of breast cancer cells, and promoted their tumor formation abilities in nude mice (p < 0.05). ANCR bound miR-331 targetedly, and the former negatively regulated the expression of the latter. LncRNA ANCR is lowly expressed upon breast cancer, and inhibits cell proliferation, invasion, and migration in vitro and in vivo. LncRNA ANCR exerts antitumor effects by targetedly binding miR-331 and then inhibiting its expression.


Assuntos
Neoplasias da Mama/genética , Neoplasias da Mama/patologia , Diferenciação Celular/genética , Movimento Celular/genética , MicroRNAs/metabolismo , RNA Longo não Codificante/metabolismo , Adulto , Idoso , Animais , Sequência de Bases , Carcinogênese/genética , Carcinogênese/patologia , Linhagem Celular Tumoral , Proliferação de Células/genética , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Camundongos Endogâmicos BALB C , Camundongos Nus , MicroRNAs/genética , Pessoa de Meia-Idade , Invasividade Neoplásica , RNA Longo não Codificante/genética
13.
J Cancer ; 12(10): 2886-2892, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33854589

RESUMO

Background and objective: Tumor-associated macrophages (TAMs) play an essential role in tumor progression and metastasis. However, the role of TAMs in neoadjuvant chemotherapy (NAC) is unclear and need to be identified. The main subject of this study was to investigate whether TAMs are related to the chemotherapeutic response with triple-negative breast cancers (TNBC). Methods: We retrospectively analyzed pretreatment tissue from patients who received NAC and followed by a mastectomy or breast-conservation for stage II-III TNBC in this study. The association between TAMs and the pathological complete response (pCR) rate of TNBC to NAC was analyzed. In addition, the correlation of the TAMs with recurrence-free survival (RFS) in patients with TNBC was also evaluated. Results: Of the 91 patients, 31 (34.1%) patients experienced pathological complete response (pCR) after completion of NAC. Regarding the chemotheraptic response, patients with low infiltration of CD163+ macrophages achieved a significantly higher rate of pCR. Importantly, Kaplan-Meier survival shown that patients with high infiltration of CD163+ macrophages and non-pCR had poor OS and RFS. Conclusions: our data showed that TAMs may predict chemotherapeutic response and can be used as a promising prognostic candidate for poor survival in TNBC patients treated with NAC.

14.
Exp Cell Res ; 404(1): 112580, 2021 07 01.
Artigo em Inglês | MEDLINE | ID: mdl-33811903

RESUMO

Breast cancer has been identified as the most common malignant tumors among women and the morbidity of breast cancer is still increasing rapidly. MEX3A possesses important functions in the regulation of mRNAs and may be involved in a variety of human diseases including cancer, whose relationship with breast cancer is still not clear. In this study, MEX3A was identified as a potential promotor in breast cancer, whose expression was strongly higher in breast cancer tissues than normal tissues. The in vitro experiments showed that MEX3A is capable of promoting the development of breast cancer through stimulating cell proliferation, inhibiting cell apoptosis, arresting cell cycle and promoting cell migration. The functions of MEX3A were also verified in vivo. Furthermore, a combination of genechip analysis and Ingenuity pathway analysis (IPA) identified PIK3CA as a potential downstream target of MEX3A, knockdown of which executes similar inhibitory effects on breast cancer and could alleviate MEX3A-induced progression of breast cancer. In conclusion, our study unveiled, as the first time, MEX3A as a tumor promotor for breast cancer, whose function was carried out probably through the regulation of PIK3CA.


Assuntos
Neoplasias da Mama/metabolismo , Proliferação de Células/fisiologia , Classe I de Fosfatidilinositol 3-Quinases/metabolismo , Regulação Neoplásica da Expressão Gênica/genética , Fosfoproteínas/metabolismo , Proteínas de Ligação a RNA/metabolismo , Neoplasias da Mama/genética , Ciclo Celular/efeitos dos fármacos , Ciclo Celular/genética , Linhagem Celular Tumoral , Movimento Celular/fisiologia , Classe I de Fosfatidilinositol 3-Quinases/genética , Feminino , Humanos , Fosfatidilinositol 3-Quinases/metabolismo , Fosfoproteínas/genética , Proteínas de Ligação a RNA/genética
15.
J Phys Chem Lett ; 12(15): 3740-3748, 2021 Apr 22.
Artigo em Inglês | MEDLINE | ID: mdl-33844544

RESUMO

Topological materials with robust topological surface states appear to be well-suited as electrochemical catalysts. However, few studies have been published on the development of non-noble metal topological catalysts, most likely because the topological properties tend to be attributed to the s and p orbital electrons, while transition-metal catalysis mainly involves d orbital electrons. Herein, we proposed a topological semimetallic (TSM) compound, VAl3, with a surface state consisting mainly of d orbital electrons, as an electrocatalyst for the hydrogen evolution reaction (HER). Density functional theory (DFT) calculations showed that the surface state electrons enhanced the adsorption of H atoms. Moreover, the transfer of surface state electrons between the surface and adsorbed H atoms was optimized through nickel doping. We experimentally prepared single-crystals VAl3 and V0.75Ni0.25Al3 alloys. Electrochemical analysis showed that not only did V0.75Ni0.25Al3 outperform VAl3 but also it was among the best non-noble metal topological HER electrocatalysts currently available.

16.
Adv Ther ; 37(6): 2734-2747, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32410166

RESUMO

INTRODUCTION: This study aims to investigate the relationship between breast white adipose tissue (WAT) inflammation and being overweight or obese, menopausal status, and metabolic syndrome-related indicators in breast cancer patients as well as the association between adipocyte size and the severity of WAT inflammation and body mass index (BMI). METHODS: The crown-like structures (CLS-B) formed by macrophages surrounding dying or dead adipocytes can be used to identify breast WAT inflammation. In this study, breast WAT and fasting blood from 136 Chinese women with breast cancer were collected for analysis. Cluster of differentiation 68 (CD68) immunohistochemical staining was performed to identify CLS-B, and the adipocyte size was measured by hematoxylin and eosin staining. RESULTS: The results showed that breast WAT inflammation usually occurs in overweight/obese breast cancer patients, and the severity of inflammation is positively correlated with adipocyte hypertrophy. We did not observe a direct association between WAT inflammation and menopausal status. In addition, the presence of WAT inflammation is associated with abnormalities in circulating factors associated with metabolic syndrome such as higher serum lipid, glucose, and C-reactive protein levels. CONCLUSION: Overweight/obese breast cancer patients may be more prone to breast WAT inflammation and may be associated with abnormalities in circulatory markers associated with metabolic syndrome.


Assuntos
Tecido Adiposo Branco , Neoplasias da Mama , Mama/patologia , Inflamação , Obesidade , Tecido Adiposo Branco/imunologia , Tecido Adiposo Branco/patologia , Índice de Massa Corporal , Neoplasias da Mama/complicações , Neoplasias da Mama/imunologia , Neoplasias da Mama/patologia , China/epidemiologia , Feminino , Humanos , Inflamação/imunologia , Inflamação/patologia , Pessoa de Meia-Idade , Obesidade/complicações , Obesidade/diagnóstico , Obesidade/imunologia , Estudos Retrospectivos
17.
Oncol Rep ; 43(5): 1375-1386, 2020 05.
Artigo em Inglês | MEDLINE | ID: mdl-32323801

RESUMO

Breast cancer (BC) is the most frequently diagnosed cancer and the leading cause of cancer­related death among women worldwide. Evidence indicates that posttranscriptional N6­methyladenosine (m6A) modification modulates BC development. In the present study, we assessed BC and normal tissues to investigate this connection. RNA m6A levels were determined by methylation quantification assay. The effects of methyltransferase­like 14 (METTL14) gain­of­expression or co­transfection with an m6A inhibitor on cell migration and invasion abilities were determined by Transwell assays. The levels of differentially expressed (DE) miRNAs were verified by real­time quantitative PCR (RT­qPCR). Gene Ontology (GO) and Kyoto Encyclopedia of Genes and Genomes analyses (KEGG) were performed to analyze potential function of target genes of the DE miRNAs. The effects of candidate miRNAs modulated by METTL14 on cell migration and invasion abilities were confirmed by Transwell assays. We demonstrated that m6A methyltransferase METTL14 was significantly upregulated in BC tissues compared with normal tissues. METTL14 gain­ and loss­of­expression regulated m6A levels in MCF­7 and MDA­MB­231 cells. The cell function assays revealed that METTL14 overexpression enhanced the migration and invasion capacities of BC cells. Moreover, treatment with the m6A inhibitor suppressed this enhanced cell migration and invasion. Additionally, aberrant expression of METTL14 reshaped the miRNA profile in BC cell lines. The remodeled DE miRNA/mRNA network was found to be most enriched in cancer pathways, and DE miRNAs were enriched in cell adhesion terms. hsa­miR­146a­5p modulated by METTL14 promoted cell migration and invasion. METTL14 modulates m6A modification and hsa­miR­146a­5p expression, thereby affecting the migration and invasion of breast cancer cells.


Assuntos
Adenosina/análogos & derivados , Neoplasias da Mama/genética , Metiltransferases/genética , MicroRNAs/genética , Regulação para Cima , Adenosina/metabolismo , Neoplasias da Mama/metabolismo , Linhagem Celular Tumoral , Movimento Celular , Proliferação de Células , Feminino , Regulação Neoplásica da Expressão Gênica , Humanos , Células MCF-7 , Metiltransferases/metabolismo , Invasividade Neoplásica
18.
Exp Ther Med ; 19(1): 400-408, 2020 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-31853317

RESUMO

Aberrant expression of microRNAs (miRNAs/miRs) mediates the initiation and progression of breast cancer. Therefore, it is important to investigate the molecular mechanisms of miRNAs and their effects on breast cancer progression. In the present study, miR-532-5p was highly expressed in breast cancer tissues compared with normal tissues. In addition, expression of ras-related and estrogen-regulated growth inhibitor (RERG), a tumor suppressor in breast cancer, was negatively correlated with miR-532-5p expression. Inhibition of miR-532-5p significantly elevated RERG at both mRNA and protein levels and inactivated the mitogen-activated protein kinase (MAPK)/ERK signaling pathway. Overexpression of miR-532-5p decreased RERG expression and activated the MAPK/ERK signaling in breast cancer cell line MDA-MB-231. Bioinformatic analysis indicated that RERG 3'-untraslated region contained a putative binding site for miR-532-5p. Dual luciferase assay further validated RERG as a target gene of miR-532-5p. Notably, downregulation of miR-532-5p inhibited MDA-MB-231 cell proliferation and migration, which was partially attenuated upon RERG knockdown. In conclusion, the current study revealed an oncogenic role of miR-532-5p in breast cancer cells via direct targeting of RERG expression.

19.
J Phys Condens Matter ; 31(29): 295501, 2019 Jul 24.
Artigo em Inglês | MEDLINE | ID: mdl-30965305

RESUMO

ThTaN3 is known as a rare cubic perovskite nitride topological crystalline insulator (TCI). Here, we propose, using first-principles calculations, that compressive uniaxial (0 0 1) strained ThTaN3 can host a three dimensional nodal-chain semimetal state when spin-orbit coupling (SOC) is ignored. When SOC is turned on, the nodal-chain is gapped out, resulting in a pair of type-II Dirac points as protected by C 4 crystal symmetry. Intriguingly, under an increasing compressive uniaxial (0 0 1) strain, a new pair of type-I Dirac points emerges, realizing a novel Dirac semimetal that hosts both type-I and type-II Dirac points in momentum space. The electronic structures of the projected surfaces are also discussed, and the unique Fermi arcs are observed. Our results make ThTaN3 a promising platform for experimental realization of multiple types of Dirac fermions in a single material system.

20.
J Cancer ; 9(24): 4635-4641, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-30588247

RESUMO

Background: Cancer-associated fibroblasts (CAFs) have been shown to be among the most prominent cells in tumor microenvironment and play a significant role in accelerating tumor metastasis by interacting with other type of cells. Tumor-associated macrophages (TAMs), the predominant tumor-infiltrating immune cells, also play important roles in cancer progression. Here, we aimed to evaluate the effects of CAFs on infiltration of TAMs and lymphatic metastasis in triple-negative breast cancer (TNBC). Material and methods: The study included 278 patients with histologically confirmed TNBC. Immunohistochemical staining of α-smooth muscle actin and fibroblast activation protein were used to identify CAFs. Polarized functional status of infiltrated TAMs was detected by expression of CD163. The clinicopathological features were assessed from all the patients' medical records. Results: The CAFs-related markers were found to be expressed more frequently in TNBC patents with aggressive behaviors, including recurrence and poor histological differentiation. High activation of CAFs was positively correlated with elevated infiltration of polarized CD163-positive TAMs and lymph node metastasis in TNBC patients. Multivariate Cox analysis revealed that the activation of CAFs, TAMs infiltration, and lymph node metastasis were independent prognostic factors for disease-free survival in TNBC patients. Conclusion: Cancer-associated fibroblasts were associated with infiltration of CD163-positive macrophages and lymphatic metastasis, and may be potential prognostic predictors of TNBC.

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