Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 41
Filtrar
Más filtros

Banco de datos
País/Región como asunto
Tipo del documento
País de afiliación
Intervalo de año de publicación
1.
BMC Med Res Methodol ; 24(1): 16, 2024 Jan 22.
Artículo en Inglés | MEDLINE | ID: mdl-38254038

RESUMEN

Lung cancer is a leading cause of cancer deaths and imposes an enormous economic burden on patients. It is important to develop an accurate risk assessment model to determine the appropriate treatment for patients after an initial lung cancer diagnosis. The Cox proportional hazards model is mainly employed in survival analysis. However, real-world medical data are usually incomplete, posing a great challenge to the application of this model. Commonly used imputation methods cannot achieve sufficient accuracy when data are missing, so we investigated novel methods for the development of clinical prediction models. In this article, we present a novel model for survival prediction in missing scenarios. We collected data from 5,240 patients diagnosed with lung cancer at the Weihai Municipal Hospital, China. Then, we applied a joint model that combined a BN and a Cox model to predict mortality risk in individual patients with lung cancer. The established prognostic model achieved good predictive performance in discrimination and calibration. We showed that combining the BN with the Cox proportional hazards model is highly beneficial and provides a more efficient tool for risk prediction.


Asunto(s)
Neoplasias Pulmonares , Humanos , Neoplasias Pulmonares/diagnóstico , Teorema de Bayes , Pronóstico , Calibración , China/epidemiología
2.
BMC Cancer ; 23(1): 559, 2023 Jun 17.
Artículo en Inglés | MEDLINE | ID: mdl-37328752

RESUMEN

BACKGROUND: Peritoneal metastasis is one of the main causes of death in patients with gastric cancer (GC). Galectin-1 regulates various undesirable biological behaviors in GC and may be key in GC peritoneal metastasis. METHODS: In this study, we elucidated the regulatory role of galectin-1 in GC cell peritoneal metastasis. GC and peritoneal tissues underwent hematoxylin-eosin (HE), immunohistochemical (IHC), and Masson trichrome staining to analyze the difference in galectin-1 expression and peritoneal collagen deposition in different GC clinical stages. The regulatory role of galectin-1 in GC cell adhesion to mesenchymal cells and in collagen expression was determined using HMrSV5 human peritoneal mesothelial cells (HPMCs). Collagen and corresponding mRNA expression were detected with western blotting and reverse transcription PCR, respectively. The promoting effect of galectin-1 on GC peritoneal metastasis was verified in vivo. Collagen deposition and collagen I, collagen III, and fibronectin 1 (FN1) expression in the peritoneum of the animal models were detected by Masson trichrome and IHC staining. RESULTS: Galectin-1 and collagen deposition in the peritoneal tissues was correlated with GC clinical staging and were positively correlated. Galectin-1 enhanced the ability of GC cells to adhere to the HMrSV5 cells by promoting collagen I, collagen III, and FN1 expression. The in vivo experiments confirmed that galectin-1 promoted GC peritoneal metastasis by promoting peritoneal collagen deposition. CONCLUSION: Galectin-1-induced peritoneal fibrosis may create a favorable environment for GC cell peritoneal metastasis.


Asunto(s)
Galectina 1 , Fibrosis Peritoneal , Neoplasias Peritoneales , Neoplasias Gástricas , Animales , Humanos , Galectina 1/genética , Fibrosis Peritoneal/genética , Fibrosis Peritoneal/metabolismo , Neoplasias Peritoneales/secundario , Peritoneo/patología , Neoplasias Gástricas/patología
3.
Nanotechnology ; 34(45)2023 Aug 22.
Artículo en Inglés | MEDLINE | ID: mdl-37356433

RESUMEN

Organic-inorganic hybrid perovskite nanocrystals have become a very widely used as semiconductor light-emitting materials. However, perovskite nanocrystals face stability challenges, which is a key factor hindering their application. In this paper, by introducing water into the synthesis of formamidinium lead bromide (FAPbBr3) perovskite, ultra-stable FAPbBr3@PbBr(OH) fluorescent material was prepared. The photoluminescence intensity of the material after the addition of water increased 2.9 times compared with that before the addition of water. The excellent green fluorescence emission was still maintained after four cycles of wash-dry treatment. Meanwhile, it also exhibits good ultraviolet and thermal stability. The above enhanced performance of FAPbBr3nanocrystals is attributed the protection of PbBr(OH). In addition, the prepared material can be used in anti-counterfeit patterns. The anti-counterfeit patterns have good color rendering and the luminous color has a high dependence on temperature. Both of these features make it very valuable for various fluorescent anti-counterfeiting labels.

4.
Crit Rev Eukaryot Gene Expr ; 32(4): 21-29, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35695662

RESUMEN

The regulatory mechanism and function of steroid receptor coactivator-1 (SRC-1) was determined in vitro and the role played in gastric cancer was investigated. The study collected 64 patients with gastric cancer tissue and paracancerous tissue to investigate the clinical patterns of SRC-1 expression in gastric cancer. Quantitative polymerase chain reaction, Western blot, enzyme-linked immunosorbent assay, and immunofluorescence staining were used in this study. In patients with gastric cancer, SRC-1 serum expression levels were up-regulated. Over-expression of SRC-1 promoted cell growth and cell metastasis in vitro model of gastric cancer. However, down-regulation of SRC-1 reduced cell growth and cell metastasis in vitro model of gastric cancer. SRC-1 over-expression induced vascular endothelial growth factor C (VEGFC) protein expressions in vitro model by activation of nuclear factor-kappa B (NF-kB) expression. The inhibition of NF-κB reduced the pro-cancer effects of SRC-1 on cell growth and cell metastasis in vitro model of gastric cancer through inhibition of VEGFC expression. These results suggest that SRC-1 promoted cell metastasis of gastric cancer via VEGFC activator by NF-κB. These novel findings may shed further light on the pathogenesis of gastric cancer and on potential precursor markers.


Asunto(s)
Coactivador 1 de Receptor Nuclear/sangre , Receptores de Esteroides , Neoplasias Gástricas , Línea Celular Tumoral , Humanos , FN-kappa B/metabolismo , Transducción de Señal , Neoplasias Gástricas/metabolismo , Factor C de Crecimiento Endotelial Vascular/genética , Factor C de Crecimiento Endotelial Vascular/metabolismo
5.
Opt Lett ; 47(8): 2032-2035, 2022 Apr 15.
Artículo en Inglés | MEDLINE | ID: mdl-35427329

RESUMEN

A kind of plasmonic nanostructure is proposed that can generate the arbitrary superposition of orbital angular momentum (OAM) states in surface plasmons (SPs), which is achieved by combining the segmented spirals with nanoslit pairs. The structures can independently modulate both the phase and amplitude of SP waves, and thus enable the superposition of two OAM states with arbitrary topological charges (TCs) as well as free control of their relative amplitudes. Superposed states distributed over the entire Bloch sphere and hybrid superposed states with different TCs were constructed and experimentally demonstrated. This work will offer more opportunities for multifunctional plasmonic devices.

6.
J Gastroenterol Hepatol ; 37(1): 124-133, 2022 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-34494305

RESUMEN

BACKGROUND AND AIM: Long non-coding RNA (lncRNA) TNK2 AS1 is a noncoding RNA with the capability of affecting microRNAs (miRNAs) levels and gene expression. The study was designed to investigate the mechanism of TNK2 AS1 in gastric cancer. METHODS: The loss and gain of function of TNK2 AS1 were investigated by analyzing the malignant behavior of AGS cells including the abilities of migration, invasion, and epithelial-mesenchymal transition (EMT) process via wound healing and transwell assay, as well as western blot. The targeting relationship of LncRNA TNK2 AS1 was analyzed through searching bioinformatics database, luciferase reporter assay, and RNA immunoprecipitation (RIP) assay. Tumor-bearing experiment in nude mice was performed to further confirm the regulatory role of TNK2 AS1 in vivo. Immunofluorescence assay for Ki67 expression was carried out in tumor tissues of mice model. RESULTS: The results showed that TNK2 AS1 overexpression promoted the malignant behaviors of AGS cells, which could be weakened by miR-125a-5p mimic addition. In addition, Jumonji, At-rich interaction domain (JARID2), and phosphatidylinositol 3 kinase (PI3K)/AKT pathway were regulated by TNK2-AS1/miR-125a-5p axis. In vivo, TNK2 AS1/miR-125a-5p axis promoted tumor growth and led to increases in green fluorescence intensity and vimentin expression and a decrease in E-cadherin level, which could be mediated by JARID2 and PI3K/AKT pathway. CONCLUSION: Therefore, a conclusion was drawn that TNK2-AS1/miR-125a-5p promoted the progression of gastric cancer.


Asunto(s)
MicroARNs , ARN Largo no Codificante , Neoplasias Gástricas , Animales , Regulación Neoplásica de la Expresión Génica , Ratones , Ratones Desnudos , MicroARNs/genética , MicroARNs/metabolismo , Fosfatidilinositol 3-Quinasa/metabolismo , Proteínas Proto-Oncogénicas c-akt/metabolismo , ARN Largo no Codificante/genética , ARN Largo no Codificante/metabolismo , Transducción de Señal , Neoplasias Gástricas/genética , Neoplasias Gástricas/patología
7.
Nanotechnology ; 32(12): 125401, 2021 Mar 19.
Artículo en Inglés | MEDLINE | ID: mdl-33285524

RESUMEN

Plasmonic metallic nanostructure with unique hot carrier-driven photocatalysis has recently emerged as a promising photocatalyst. Herein, we show that the plasmonic photocatalysis can be significantly promoted by supporting bimetallic Au@Ag nanoalloys (NAs) on graphene oxide (GO). The obtained Au3@Ag1/GO (molar ratio of Au to Ag∼3:1) with improved synergistic effects provides a remarkable higher visible-light (>400 nm) photocatalytic activity for a complete degradation (99.36%) of tetracycline hydrochloride (TCH) molecules within 70 min, while about 61.74% or 62.38% via monometallic Au/GO or Ag/GO. The optimum photocatalytic performance is attributed to the production of high yield hot carriers on NAs with enhanced localized surface plasmon resonance property and the pronounced photoinduced electron-transfer ability of modified GO support by overgrowth of NAs. These findings enable the optimal Au3@Ag1/GO to become an appealing high-performance photocatalyst for promoting diverse photochemical reactions.

8.
J Asian Nat Prod Res ; 23(12): 1204-1209, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-33502258

RESUMEN

A new lanostane triterpenoid (1) and two known (2, 3) analogues were isolated from Nothotsuga longibracteata. Their chemical structures were identified by spectral data including HR-ESI-MS, 1 D, and 2 D NMR. These lanostane triterpenoids showed no cytotoxic activities against three human tumour cell lines (A172, SHSY5Y, and Hela), but exhibited the activity of promoting the gastrointestinal motility of zebrafish treated with Nile red.


Asunto(s)
Ganoderma , Triterpenos , Animales , Línea Celular Tumoral , Humanos , Estructura Molecular , Triterpenos/farmacología , Pez Cebra
9.
J Asian Nat Prod Res ; 21(12): 1184-1189, 2019 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-30612468

RESUMEN

A new triphenanthrene compound named 2,2',2'',7,7',7''-hexahydroxy-4,4',4''-trimethoxy-[9,9',9'',10,10',10'']-hexahydro-1,8,1',6''-triphenanthrene (1), together with eleven known compounds (2-12), were isolated from tubers of Bletilla striata. Their structures were determined by analysis of spectroscopic data.


Asunto(s)
Orchidaceae , Estructura Molecular , Tubérculos de la Planta
10.
J Cell Mol Med ; 22(2): 797-807, 2018 02.
Artículo en Inglés | MEDLINE | ID: mdl-28940639

RESUMEN

Metastasis is a crucial impediment to the successful treatment for gastric cancer. SPOCK1 has been demonstrated to facilitate cancer metastasis in certain types of cancers; however, the role of SPOCK1 in the invasion and metastasis of gastric cancer remains elusive. SPOCK1 and epithelial-mesenchymal transition (EMT)-related biomarkers were detected by immunohistochemistry and Western blot in gastric cancer specimens. Other methods including stably transfected against SPOCK1 into gastric cancer cells, Western blot, migration and invasion assays in vitro and metastasis assay in vivo were also performed. The elevated expression of SPOCK1 correlates with EMT-related markers in human gastric cancer tissue, clinical metastasis and a poor prognosis in patients with gastric cancer. In addition, knockdown of SPOCK1 expression significantly inhibits the invasion and metastasis of gastric cancer cells in vitro and in vivo, inversely, SPOCK1 overexpression results in the opposite effect. Interestingly, SPOCK1 expression has no effect on cell proliferation in vitro and in vivo. Regarding the mechanism(s) of SPOCK1-induced cells invasion and metastasis, we prove that Slug-induced EMT is involved in SPOCK1-facilitating gastric cancer cells invasion and metastasis. The elevated SPOCK1 expression is closely correlated with cancer metastasis and patient survival, and SPOCK1 promotes the invasion and metastasis of gastric cancer through Slug-mediated EMT, thereby possibly providing a novel therapeutic target for gastric cancer.


Asunto(s)
Transición Epitelial-Mesenquimal , Proteoglicanos/metabolismo , Factores de Transcripción de la Familia Snail/metabolismo , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/patología , Animales , Cadherinas/metabolismo , Línea Celular Tumoral , Movimiento Celular , Proliferación Celular , Células Epiteliales/metabolismo , Femenino , Silenciador del Gen , Humanos , Masculino , Ratones Endogámicos BALB C , Ratones Desnudos , Persona de Mediana Edad , Invasividad Neoplásica , Metástasis de la Neoplasia , Vimentina/metabolismo
11.
J Cell Mol Med ; 22(6): 3215-3222, 2018 06.
Artículo en Inglés | MEDLINE | ID: mdl-29566309

RESUMEN

Alpha B-crystallin (CRYAB) is overexpressed in a variety of cancers. However, little is known about its specific function and regulatory mechanism in gastric cancer. Here, we first explore the role of CRYAB in gastric cancer progression and metastasis. The expression of CRYAB was determined by western blot and immunohistochemistry in gastric cancer tissues. Besides, methods including stably transfected against CRYAB into gastric cancer cells, western blot, migration and invasion assays in vitro and metastasis assay in vivo were also conducted. The expression of CRYAB is up-regulated in gastric cancer tissues compared with matched normal tissues. High expression level of CRYAB is closely correlated with cancer metastasis and shorter survival time in patients with gastric cancer. Additionally, CRYAB silencing significantly suppresses epithelial-mesenchymal transition (EMT), migration and invasion of gastric cancer cells in vitro and in vivo, whereas CRYAB overexpression dramatically reverses these events. Mechanically, CRYAB facilitates gastric cancer cells invasion and metastasis via nuclear factor-κ-gene binding (NF-κB)-regulated EMT. These findings suggest that CRYAB expression predicts a poor prognosis in patients with gastric cancer. Besides, CRYAB contributes to gastric cancer cells migration and invasion via EMT, mediated by the NF-κB signalling pathway, thus possibly providing a novel therapeutic target for gastric cancer.


Asunto(s)
Proliferación Celular/genética , Pronóstico , Neoplasias Gástricas/genética , Cadena B de alfa-Cristalina/genética , Animales , Línea Celular Tumoral , Movimiento Celular/genética , Supervivencia sin Enfermedad , Transición Epitelial-Mesenquimal , Femenino , Regulación Neoplásica de la Expresión Génica/genética , Humanos , Lentivirus/genética , Masculino , Ratones , Persona de Mediana Edad , FN-kappa B/genética , Invasividad Neoplásica/genética , Metástasis de la Neoplasia , Neoplasias Gástricas/epidemiología , Neoplasias Gástricas/patología , Transfección , Ensayos Antitumor por Modelo de Xenoinjerto , Cadena B de alfa-Cristalina/administración & dosificación
12.
Cell Physiol Biochem ; 42(3): 1025-1036, 2017.
Artículo en Inglés | MEDLINE | ID: mdl-28662499

RESUMEN

BACKGROUND/AIMS: Gastric cancer (GC) is a common and lethal malignancy, and AMP-activated protein kinase-related kinase 5 (ARK5) has been discovered to promote cancer metastasis in certain types of cancer. In this study, we explored the role of ARK5 in GC invasion and metastasis. METHODS: ARK5 and epithelial-mesenchymal transition (EMT)-related markers were determined by immunohistochemistry and western blot in GC specimens. Other methods including stably transfected against ARK5 into SGC7901 and AGS cells, western blot, migration and invasion assays in vitro and nude mice tumorigenicity in vivo were also employed. RESULTS: The results demonstrated that ARK5 expression was increased and positively correlated with metastasis, EMT-related markers and poor prognosis in patients with GC. Knockdown of ARK5 expression remarkably suppressed GC cells invasion and metastasis via regulating EMT, rather than proliferation in vitro and in vivo. And knockdown of ARK5 expression in GC cells resulted in the down-regulation of the mTOR/p70S6k signals, Slug and SIP1. CONCLUSION: The elevated ARK5 expression was closely associated with cancer metastasis and patient survival, and it seemed to function in GC cells migration and invasion via EMT alteration, together with the alteration of the mTOR/p70S6k signals, Slug and SIP1, thus providing a potential therapeutic target for GC.


Asunto(s)
Regulación Neoplásica de la Expresión Génica , Invasividad Neoplásica/genética , Proteínas Quinasas/genética , Interferencia de ARN , Proteínas Represoras/genética , Neoplasias Gástricas/genética , Estómago/patología , Animales , Línea Celular Tumoral , Transición Epitelial-Mesenquimal , Femenino , Mucosa Gástrica/metabolismo , Humanos , Masculino , Ratones Endogámicos BALB C , Ratones Desnudos , Persona de Mediana Edad , Invasividad Neoplásica/patología , Metástasis de la Neoplasia/genética , Metástasis de la Neoplasia/patología , ARN Interferente Pequeño/genética , Transducción de Señal , Neoplasias Gástricas/metabolismo , Neoplasias Gástricas/patología , Serina-Treonina Quinasas TOR/metabolismo
13.
Biochim Biophys Acta Gen Subj ; 1868(5): 130592, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38395204

RESUMEN

BACKGROUND: Hepatocellular carcinoma (HCC) cell-intrinsic programmed death 1 (PD-1) promotes tumor progression. However, the mechanisms that regulate its expression are unclear. This study investigated the impact of alpha-fetoprotein (AFP) on HCC cell-intrinsic PD-1 expression. METHODS: The expression of PD-1 and AFP at the gene and protein levels was detected using real-time fluorescence quantitative polymerase chain reaction (RT-qPCR) and western blotting (WB). Proteins interacting with AFP were examined by co-immunoprecipitation (CO-IP). Chromatin immunoprecipitation (ChIP) and dual luciferase reporter assays were used to identify transcription-enhanced association domain 1 (TEAD1) binding to the promoter of PD-1. RESULTS: The expression of HCC cell-intrinsic PD-1 was positively correlated with AFP. Mechanistically, AFP inhibited the phosphorylation of large tumor suppressor 2 (LATS2) and yes-associated protein (YAP). As a result, YAP is transferred to the nucleus and forms a transcriptional complex with TEAD1, promoting PD-1 transcription by binding to its promoter. CONCLUSION: AFP is an upstream regulator of the HCC cell-intrinsic PD-1 and increases PD-1 expression via the LATS2/YAP/TEAD1 axis. GENERAL: Our findings provide insight into the mechanisms of HCC development and offer new ideas for further in-depth studies of HCC.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/metabolismo , alfa-Fetoproteínas/metabolismo , Neoplasias Hepáticas/metabolismo , Receptor de Muerte Celular Programada 1/metabolismo , Factores de Transcripción/genética , Factores de Transcripción/metabolismo , Proteínas Adaptadoras Transductoras de Señales/genética , Proteínas Adaptadoras Transductoras de Señales/metabolismo , Proteínas Serina-Treonina Quinasas/genética , Proteínas Supresoras de Tumor/genética , Proteínas Supresoras de Tumor/metabolismo , Factores de Transcripción de Dominio TEA
14.
ACS Appl Mater Interfaces ; 16(15): 19849-19857, 2024 Apr 17.
Artículo en Inglés | MEDLINE | ID: mdl-38572837

RESUMEN

Two-dimensional (2D) perovskites have been widely adopted for improving the performance and stability of three-dimensional (3D) metal halide perovskite devices. However, rational manipulation of the phase composition of 2D perovskites for suitable energy level alignment in 2D/3D perovskite photodetectors (PDs) has been rarely explored. Herein, we precisely controlled the dimensionality of the 2D perovskite on CsPbI2Br films by tuning the polarity of the n-butylammonium iodide (BAI)-based solvents. In comparison to the pure n = 1 2D perovskite (ACN-BAI) formed by acetonitrile treatment, a mixture of n = 1 and n = 2 phases (IPA-BAI) generated by isopropanol (IPA) treatment guaranteed more robust defect passivation and favorable energy level alignment at the perovskite/hole transport layer interface. Consequently, the IPA-BAI PD exhibited a responsivity of 0.41 A W-1, a detectivity of 1.01 × 1013 Jones, and a linear dynamic range of 120 dB. Furthermore, the mixed-phase 2D layer effectively shielded the 3D perovskite from moisture. The IPA-BAI device retained 76% of its initial responsivity after 500 h of nonencapsulated storage at 10% relative humidity. This research provides valuable insights into the dimensional modulation of 2D perovskites for further enhancing the performance of 2D/3D perovskite PDs.

15.
Nanomaterials (Basel) ; 14(2)2024 Jan 20.
Artículo en Inglés | MEDLINE | ID: mdl-38276748

RESUMEN

The generation of moiré lattices by superimposing two identical sublattices at a specific twist angle has garnered significant attention owing to its potential applications, ranging from two-dimensional materials to manipulating light propagation. While macroscale moiré lattices have been widely studied, further developments in manipulating moiré lattices at the subwavelength scale would be crucial for miniaturizing and integrating platforms. Here, we propose a plasmonic metasurface design consisting of rotated nanoslits arranged within N + N' round apertures for generating focused moiré lattices. By introducing a spin-dependent geometric phase through the rotated nanoslits, an overall lens and spiral phase can be achieved, allowing each individual set of round apertures to generate a periodic lattice in the focal plane. Superimposing two sets of N and N' apertures at specific twist angles and varying phase differences allows for the superposition of two sublattices with different periods, leading to the formation of diverse moiré patterns. Our simulations and theoretical results demonstrate the feasibility of our proposed metasurface design. Due to their compactness and tunability, the utilization of metasurfaces in creating nanoscale photonic moiré lattices is anticipated to find extensive applications in integrated and on-chip optical systems.

16.
Aging (Albany NY) ; 15(12): 5535-5549, 2023 06 16.
Artículo en Inglés | MEDLINE | ID: mdl-37335105

RESUMEN

Galectin-1 (Gal1) and non-SMC condensin I complex, subunit G (NCAPG) are associated with metastasis in several malignant tumors. However, their precise roles in gastric cancer (GC) remain uncertain. This study explored the clinical significance and relationship of Gal1 and NCAPG in GC. Gal1 and NCAPG expressions were significantly up-regulated in GC compared to adjacent non-cancerous tissues by immunohistochemistry (IHC) and Western blotting. Besides, methods including stable transfection, quantitative real-time reverse transcription PCR, Western blotting, Matrigel invasion and wound-healing assays in vitro, were also conducted. IHC scores for Gal1 and NCAPG had a positive correlation in GC tissues. High Gal1 or NCAPG expression significantly correlated with poor prognosis in GC, and Gal1 combined with NCAPG had a synergetic effect on the prediction of GC prognosis. Gal1 overexpression in vitro enhanced NCAPG expression, cell migration, and invasion in SGC-7901 and HGC-27 cells. Simultaneous Gal1 overexpression and NCAPG knockdown in GC cells partly rescued the migrative and invasive abilities. Thus, Gal1 promoted GC invasion through increased NCAPG expression. The present study demonstrated the prognostic significance of the combination of Gal1 and NCAPG in GC for the first time.


Asunto(s)
Neoplasias Gástricas , Humanos , Neoplasias Gástricas/patología , Galectina 1/genética , Galectina 1/metabolismo , Pronóstico , Movimiento Celular/genética , Proliferación Celular , Regulación Neoplásica de la Expresión Génica , Línea Celular Tumoral , Proteínas de Ciclo Celular/metabolismo
17.
JAMA Netw Open ; 6(12): e2347176, 2023 Dec 01.
Artículo en Inglés | MEDLINE | ID: mdl-38085543

RESUMEN

Importance: Despite the recommendations of lung cancer screening guidelines and the evidence supporting the effectiveness of population-based lung screening, a common barrier to effective lung cancer screening is that the participation rates of low-dose computed tomography (LDCT) screening among individuals with the highest risk are not large. There are limited data from clinical practice regarding whether opportunistic LDCT screening is associated with reduced lung-cancer mortality. Objective: To evaluate whether opportunistic LDCT screening is associated with improved prognosis among adults with lung cancer in mainland China. Design, Setting, and Participants: This cohort study included patients diagnosed with lung cancer at Weihai Municipal Hospital Healthcare Group, Weihai City, China, from 2016 to 2021. Data were analyzed from January 2022 to February 2023. Exposures: Data collected included demographic indicators, tumor characteristics, comorbidities, blood indexes, and treatment information. Patients were classified into screened and nonscreened groups on the basis of whether or not their lung cancer diagnosis occurred through opportunistic screening. Main Outcomes and Measures: Follow-up outcome indicators included lung cancer-specific mortality and all-cause mortality. Propensity score matching (PSM) was adopted to account for potential imbalanced factors between groups. The associations between LDCT screening and outcomes were analyzed using Cox regression models based on the matched data. Propensity score regression adjustment and inverse probability treatment weighting were used for sensitivity analysis. Results: A total of 5234 patients (mean [SD] baseline age, 61.8 [9.8] years; 2518 [48.1%] female) with complete opportunistic screening information were included in the analytical sample, with 2251 patients (42.91%) receiving their lung cancer diagnosis through opportunistic screening. After 1:1 PSM, 2788 patients (1394 in each group) were finally included. The baseline characteristics of the matched patients were balanced between groups. Opportunistic screening with LDCT was associated with a 49% lower risk of lung cancer death (HR, 0.51; 95% CI, 0.42-0.62) and 46% lower risk of all-cause death (HR, 0.54; 95% CI, 0.45-0.64). Conclusions and Relevance: In this cohort study of patients with lung cancer, opportunistic lung cancer screening with LDCT was associated with lower lung cancer mortality and all-cause mortality. These findings suggest that opportunistic screening is an important supplement to population screening to improve prognosis of adults with lung cancer.


Asunto(s)
Neoplasias Pulmonares , Adulto , Humanos , Femenino , Persona de Mediana Edad , Masculino , Neoplasias Pulmonares/diagnóstico por imagen , Neoplasias Pulmonares/epidemiología , Estudios de Cohortes , Detección Precoz del Cáncer/métodos , Tomografía Computarizada por Rayos X/métodos , Pulmón
18.
J Oncol ; 2022: 5473292, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-35865086

RESUMEN

The aim of the study is to explore the efficacy and safety of dendritic cell-cytokine-induced killer cell (DC-CIK) immunotherapy combined with chemotherapy in the treatment of locally advanced gastric cancer (LAGC). Among 106 patients with LAGC, 53 received the treatment of oxaliplatin-5-fluorouracil chemotherapy (control group), while the remaining 53 received DC-CIK immunotherapy combined with chemotherapy (DC-CIK group). The short-term efficacy and the changes in immune function indexes (cluster of differentiation (CD)3+, CD4+, CD8+, CD4+/CD8+, and natural killer (NK) cells) were analyzed. The overall response rate (ORR) was 47.2% (25/53) and 41.5% (22/53), and the disease control rate (DCR) was 69.8% (37/53) and 50.9% (27/53), respectively, in the DC-CIK group and the control group. It could be seen that the ORR had no statistically significant difference between the two groups, while the DCR in the DC-CIK group was significantly better than that in the control group. After treatment, the proportions of CD3+ T lymphocytes, CD4+ T lymphocytes, CD4+/CD8+ cells, and NK cells obviously rose, while the proportion of CD8+ T lymphocytes obviously declined in the DC-CIK group compared with those in the control group. After treatment, the scores in the function module of the QLQ-C30 scale were greatly higher in the DC-CIK group than those in the control group, while the scores of loss of appetite, constipation, dyspnea, fatigue, pain, and sleep disorders in the symptom module were significantly lower in the DC-CIK group than those in the control group. The median survival time was 23.4 months and 18.6 months, respectively, in the DC-CIK group and the control group. The results of the log-rank test showed that the OS in the DC-CIK group was remarkably superior to that in the control group. DC-CIK immunotherapy combined with chemotherapy can improve the immune cell function, ameliorate the quality of life, and prolong the survival time of LAGC patients, with fewer adverse reactions.

19.
Anticancer Agents Med Chem ; 22(5): 851-863, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-34102996

RESUMEN

BACKGROUND: Demethylzeylasteral (ZST93), a pharmacologically active triterpenoid monomer extracted from Tripterygium wilfordii Hook F (TWHF), has been reported to exert antineoplastic effects in several cancer cell types. However, the anti-tumour effects of ZST93 in human colorectal cancer (CRC) cells are unknown. OBJECTIVE: The aim of the present study was to evaluate the antitumor effects of ZST93 on cell cycle arrest, disruptive autophagic flux, apoptotic cell death and enhanced chemosensitivity to 5-FU in human CRC cells. METHODS: 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyl tetrazolium bromide (MTT) assay, colony formation assay, flow cytometry, immunoblotting, immunofluorescence, 5-ethynyl-20-deoxyuridine (EdU) incorporation assay and autophagy analysis were used to evaluate the effects of ZST93 on cell viability, cell cycle progression, apoptosis and autophagy in two human CRC cell lines. Moreover, ZST93's combined anti-tumour effects with 5-fluorouracil (5-FU) were evaluated. RESULTS: ZST93 inhibited CRC cell proliferation and growth. It was responsible for blocked cell cycle transition by arresting CRC cells in the G0/G1 phase via down-regulation of CDK4, CDK6, Cyclin D1 and c-MYC. Moreover, ZST93 induced suppressive autophagic flux and caspase-3-dependent cell death, which was further strengthened by the blocking of the autophagy process using chloroquine (CQ). Moreover, ZST93 enhanced CRC cells' chemosensitivity to 5-FU via modulation of autophagy and apoptosis. CONCLUSION: ZST93 exerts anti-tumor effects via disruptive autophagic flux and apoptotic cell death in human CRC cells and increases cell chemosensitivity to 5-FU. These results provide insights into the utilisation of ZST93 as an adjuvant or direct autophagy inhibitor and suggest ZST93 as a novel therapeutic strategy for treating CRC.


Asunto(s)
Neoplasias Colorrectales , Fluorouracilo , Apoptosis , Autofagia , Línea Celular Tumoral , Proliferación Celular , Neoplasias Colorrectales/patología , Fluorouracilo/farmacología , Humanos , Triterpenos
20.
Materials (Basel) ; 15(21)2022 Nov 05.
Artículo en Inglés | MEDLINE | ID: mdl-36363406

RESUMEN

A method for ultrafast time-resolved four-channel Jones matrix measurement of birefringent materials using an ultrafast laser is investigated. This facilitated the acquisition of a four-channel angular multiplexing hologram in a single shot. The Jones matrix information of a birefringent sample was retrieved from the spatial spectrum of a hologram. The feasibility of this approach was established by measuring the Jones matrix of starch granules in microfluidic chips and the complex amplitude distribution and phase delay distribution of liquid crystal cell at different voltages. Moreover, when the picosecond laser was switched to a femtosecond laser, ultrafast measurements were possible provided that the time interval between two detection pulses was larger than the pulse width.

SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA