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1.
Front Immunol ; 15: 1382520, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38698857

RESUMEN

Background: The Y-box-binding proteins (YBX) act as a multifunctional role in tumor progression, metastasis, drug resistance by regulating the transcription and translation process. Nevertheless, their functions in a pan-cancer setting remain unclear. Methods: This study examined the clinical features expression, prognostic value, mutations, along with methylation patterns of three genes from the YBX family (YBX1, YBX2, and YBX3) in 28 different types of cancer. Data used for analysis were obtained from Cancer Genome Atlas (TCGA) and Genotype-Tissue Expression (GTEx) databases. A novel YBXs score was created using the ssGSEA algorithm for the single sample gene set enrichment analysis. Additionally, we explored the YBXs score's association with the tumor microenvironment (TME), response to various treatments, and drug resistance. Results: Our analysis revealed that YBX family genes contribute to tumor progression and are indicative of prognosis in diverse cancer types. We determined that the YBXs score correlates significantly with numerous malignant pathways in pan-cancer. Moreover, this score is also linked with multiple immune-related characteristics. The YBXs score proved to be an effective predictor for the efficacy of a range of treatments in various cancers, particularly immunotherapy. To summarize, the involvement of YBX family genes is vital in pan-cancer and exhibits a significant association with TME. An elevated YBXs score indicates an immune-activated TME and responsiveness to diverse therapies, highlighting its potential as a biomarker in individuals with tumors. Finally, experimental validations were conducted to explore that YBX2 might be a potential biomarker in liver cancer. Conclusion: The creation of YBXs score in our study offered new insights into further studies. Besides, YBX2 was found as a potential therapeutic target, significantly contributing to the improvement of HCC diagnosis and treatment strategies.


Asunto(s)
Biomarcadores de Tumor , Regulación Neoplásica de la Expresión Génica , Neoplasias Hepáticas , Microambiente Tumoral , Humanos , Biomarcadores de Tumor/genética , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/diagnóstico , Microambiente Tumoral/genética , Microambiente Tumoral/inmunología , Pronóstico , Proteína 1 de Unión a la Caja Y/genética , Proteína 1 de Unión a la Caja Y/metabolismo , Mutación , Resistencia a Antineoplásicos/genética , Perfilación de la Expresión Génica , Línea Celular Tumoral , Metilación de ADN
2.
Eur J Med Chem ; 271: 116406, 2024 May 05.
Artículo en Inglés | MEDLINE | ID: mdl-38688064

RESUMEN

NRAS mutation is the second most common oncogenic factor in cutaneous melanoma. Inhibiting NRAS translation by stabilizing the G-quadruplex (G4) structure with small molecules seems to be a potential strategy for cancer therapy due to the NRAS protein's lack of a druggable pocket. To enhance the effects of previously reported G4 stabilizers quindoline derivatives, we designed and synthesized a novel series of quindoline derivatives with fork-shaped side chains by introducing (alkylamino)alkoxy side chains. Panels of experimental results showed that introducing a fork-shaped (alkylamino)alkoxy side chain could enhance the stabilizing abilities of the ligands against NRAS RNA G-quadruplexes and their anti-melanoma activities. One of them, 10b, exhibited good antitumor activity in the NRAS-mutant melanoma xenograft mouse model, showing the therapeutic potential of this kind of compounds.


Asunto(s)
Antineoplásicos , Diseño de Fármacos , G-Cuádruplex , GTP Fosfohidrolasas , Proteínas de la Membrana , G-Cuádruplex/efectos de los fármacos , Humanos , Animales , GTP Fosfohidrolasas/metabolismo , Ratones , Antineoplásicos/farmacología , Antineoplásicos/síntesis química , Antineoplásicos/química , Proteínas de la Membrana/antagonistas & inhibidores , Proteínas de la Membrana/metabolismo , Proteínas de la Membrana/genética , Relación Estructura-Actividad , Estructura Molecular , Melanoma/tratamiento farmacológico , Melanoma/patología , Relación Dosis-Respuesta a Droga , Proliferación Celular/efectos de los fármacos , Indoles/farmacología , Indoles/química , Indoles/síntesis química , Línea Celular Tumoral , Ensayos de Selección de Medicamentos Antitumorales , ARN/metabolismo , ARN/química , Biosíntesis de Proteínas/efectos de los fármacos , Alcaloides , Quinolinas
3.
Light Sci Appl ; 13(1): 74, 2024 Mar 14.
Artículo en Inglés | MEDLINE | ID: mdl-38485915

RESUMEN

Photonic quantum computation plays an important role and offers unique advantages. Two decades after the milestone work of Knill-Laflamme-Milburn, various architectures of photonic processors have been proposed, and quantum advantage over classical computers has also been demonstrated. It is now the opportune time to apply this technology to real-world applications. However, at current technology level, this aim is restricted by either programmability in bulk optics or loss in integrated optics for the existing architectures of processors, for which the resource cost is also a problem. Here we present a von-Neumann-like architecture based on temporal-mode encoding and looped structure on table, which is capable of multimode-universal programmability, resource-efficiency, phase-stability and software-scalability. In order to illustrate these merits, we execute two different programs with varying resource requirements on the same processor, to investigate quantum signature of chaos from two aspects: the signature behaviors exhibited in phase space (13 modes), and the Fermi golden rule which has not been experimentally studied in quantitative way before (26 modes). The maximal program contains an optical interferometer network with 1694 freely-adjustable phases. Considering current state-of-the-art, our architecture stands as the most promising candidate for real-world applications.

4.
Br J Cancer ; 130(9): 1434-1440, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38472421

RESUMEN

BACKGROUND: The early-onset rectal cancer with rapidly increasing incidence is considered to have distinct clinicopathological and molecular profiles with high-risk features. This leads to challenges in developing specific treatment strategies for early-onset rectal cancer patients and questions of whether early-onset locally advanced rectal cancer (LARC) needs aggressive neoadjuvant treatment. METHODS: In this post hoc analysis of FOWARC trial, we investigated the role of preoperative radiation in early-onset LARC by comparing the clinicopathological profiles and short-term and long-term outcomes between the early-onset and late-onset LARCs. RESULTS: We revealed an inter-tumor heterogeneity of clinical profiles and treatment outcomes between the early-onset and late-onset LARCs. The high-risk features were more prevalent in early-onset LARC. The neoadjuvant radiation brought less benefits of tumor response and more risk of complications in early-onset group (pCR: OR = 3.75, 95% CI = 1.37-10.27; complications: HR = 11.35, 95% CI = 1.46-88.31) compared with late-onset group (pCR: OR = 5.33, 95% CI = 1.83-15.58; complications: HR = 5.80, 95% CI = 2.32-14.49). Furthermore, the addition of radiation to neoadjuvant chemotherapy didn't improve long-term OS (HR = 1.37, 95% CI = 0.49-3.87) and DFS (HR = 1.05, 95% CI = 0.58-1.90) for early-onset patients. CONCLUSION: Preoperative radiation plus chemotherapy may not be superior to the chemotherapy alone in the early-onset LARC. Our findings provide insight into the treatment of early-onset LARC by interrogating the aggressive treatment and alternative regimens.


Asunto(s)
Terapia Neoadyuvante , Neoplasias del Recto , Humanos , Neoplasias del Recto/terapia , Neoplasias del Recto/patología , Terapia Neoadyuvante/métodos , Masculino , Femenino , Persona de Mediana Edad , Anciano , Quimioradioterapia/métodos , Adulto , Resultado del Tratamiento , Edad de Inicio
5.
Regen Med ; 19(2): 93-102, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38415316

RESUMEN

Objective: This study aimed to explore the efficacy and optimal delivery time of human umbilical cord mesenchymal stem cells (hUC-MSCs) in treating collagenase-induced Achilles tendinopathy. Methods: Achilles tendinopathy in rats at early or advanced stages was induced by injecting collagenase I into bilateral Achilles tendons. A total of 28 injured rats were injected with a hUC-MSC solution or normal saline into bilateral tendons twice and sampled after 4 weeks for histological staining, gene expression analysis, transmission electron microscope assay and biomechanical testing analysis. Results: The results revealed better histological performance and a larger collagen fiber diameter in the MSC group. mRNA expression of TNF-α, IL-1ß and MMP-3 was lower after MSC transplantation. Early MSC delivery promoted collagen I and TIMP-3 synthesis, and strengthened tendon toughness. Conclusion: hUC-MSCs demonstrated a therapeutic effect in treating collagenase-induced Achilles tendinopathy, particularly in the early stage of tendinopathy.


Asunto(s)
Tendón Calcáneo , Trasplante de Células Madre Mesenquimatosas , Células Madre Mesenquimatosas , Tendinopatía , Humanos , Ratas , Animales , Tendinopatía/terapia , Tendón Calcáneo/metabolismo , Tendón Calcáneo/patología , Colagenasas/efectos adversos , Colagenasas/metabolismo , Colágeno Tipo I/efectos adversos , Colágeno Tipo I/metabolismo , Células Madre Mesenquimatosas/metabolismo , Cordón Umbilical/metabolismo , Trasplante de Células Madre Mesenquimatosas/métodos
6.
J Am Chem Soc ; 146(10): 6530-6535, 2024 Mar 13.
Artículo en Inglés | MEDLINE | ID: mdl-38410847

RESUMEN

Thermal quenching (TQ) has been naturally entangling with luminescence since its discovery, and lattice vibration, which is characterized as multiphonon relaxation (MPR), plays a critical role. Considering that MPR may be suppressed under exterior pressure, we have designed a core/shell upconversion luminescence (UCL) system of α-NaYF4:Yb/Ln@ScF3 (Ln = Ho, Er, and Tm) with positive/negative thermal expansion behavior so that positive thermal expansion of the core will be restrained by negative thermal expansion of the shell when heated. This imposed pressure on the crystal lattice of the core suppresses MPR, reduces the amount of energy depleted by TQ, and eventually saves more energy for luminescing, so that anti-TQ or even thermally enhanced UCL is obtained.

7.
Vaccine ; 42(5): 1136-1144, 2024 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-38267332

RESUMEN

BACKGROUND: Pneumococcal Diseases (PDs) remains a serious public health problem around the world and in China. Pneumococcal vaccination is the most cost-effective measure to prevent PDs. In 2021, the government of Weifang City, Shandong Province, China introduced a free dose of domestic 13-valent Pneumococcal Conjugate Vaccine (PCV 13) to vaccinate registered children aged 6 months-2 years. This study aimed to evaluate the vaccination rate of PCV13 in children aged under 5 years before and after the vaccination program to provide evidences for further improving the prevention and control strategy for PDs. METHODS: We collected data from the children's vaccination information management system in Weifang City and analyzed the PCV13 vaccination coverage and characteristics in all vaccination clinics of Weifang City for children aged under 5 years. We compared the differences in vaccination rates by gender, birth year, manufacturer, and county before and after innovative immunization strategy. RESULTS: Among the included 593,784 children aged under 5 years, the PCV13 vaccination rate in Weifang was generally low before the innovative immunization strategy. Urban children had a higher PCV13 coverage than rural children (P < 0.001), and parents tended to vaccinate their children with imported PCV13.The full vaccination rate for domestic and imported PCV13 was 0.67 % and 1.70 %, respectively. After the vaccination program, the PCV13 coverage of children increased significantly in all counties within Weifang City (P < 0.001), especially for children above 12 months of age. Most parents preferred to vaccinate their children with domestic PCV13, and the full vaccination rate of domestic and imported PCV13 was 6.59 % and 0.16 %, respectively. CONCLUSIONS: The vaccination rate of PCV13 in children is still much lower than the global average, posting a severe health challenge that needs to be addressed thoroughly. To improve the prevention and control strategy for PDs, it is recommended to continue to explore other relevant incentives based on the innovative immunization strategy. Furthermore, it is also recommended that China should incorporate PCV13 into the National Immunization Programs (NIP) as soon as possible.


Asunto(s)
Infecciones Neumocócicas , Streptococcus pneumoniae , Niño , Humanos , Lactante , Preescolar , Estudios Retrospectivos , Cobertura de Vacunación , Vacunación , Infecciones Neumocócicas/prevención & control , Vacunas Neumococicas , China , Vacunas Conjugadas
8.
Curr Med Sci ; 44(1): 134-143, 2024 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-38273178

RESUMEN

OBJECTIVE: SUMO-specific protease 3 (SENP3), a member of the SUMO-specific protease family, reverses the SUMOylation of SUMO-2/3 conjugates. Dysregulation of SENP3 has been proven to be involved in the development of various tumors. However, its role in mantle cell lymphoma (MCL), a highly aggressive lymphoma, remains unclear. This study was aimed to elucidate the effect of SENP3 in MCL. METHODS: The expression of SENP3 in MCL cells and tissue samples was detected by RT-qPCR, Western blotting or immunohistochemistry. MCL cells with stable SENP3 knockdown were constructed using short hairpin RNAs. Cell proliferation was assessed by CCK-8 assay, and cell apoptosis was determined by flow cytometry. mRNA sequencing (mRNA-seq) was used to investigate the underlying mechanism of SENP3 knockdown on MCL development. A xenograft nude mouse model was established to evaluate the effect of SENP3 on MCL growth in vivo. RESULTS: SENP3 was upregulated in MCL patient samples and cells. Knockdown of SENP3 in MCL cells inhibited cell proliferation and promoted cell apoptosis. Meanwhile, the canonical Wnt signaling pathway and the expression of Wnt10a were suppressed after SENP3 knockdown. Furthermore, the growth of MCL cells in vivo was significantly inhibited after SENP3 knockdown in a xenograft nude mouse model. CONCLUSION: SENP3 participants in the development of MCL and may serve as a therapeutic target for MCL.


Asunto(s)
Linfoma de Células del Manto , Adulto , Animales , Humanos , Ratones , Apoptosis/genética , Cisteína Endopeptidasas/genética , Cisteína Endopeptidasas/metabolismo , Modelos Animales de Enfermedad , Linfoma de Células del Manto/genética , Linfoma de Células del Manto/tratamiento farmacológico , Linfoma de Células del Manto/patología , Ratones Desnudos , Proteínas del Tejido Nervioso , Péptido Hidrolasas/uso terapéutico , ARN Mensajero , Proteínas Wnt/uso terapéutico
9.
Biomolecules ; 13(10)2023 09 25.
Artículo en Inglés | MEDLINE | ID: mdl-37892125

RESUMEN

Plants uptake and assimilate nitrogen from the soil in the form of nitrate, ammonium ions, and available amino acids from organic sources. Plant nitrate and ammonium transporters are responsible for nitrate and ammonium translocation from the soil into the roots. The unique structure of these transporters determines the specificity of each transporter, and structural analyses reveal the mechanisms by which these transporters function. Following absorption, the nitrogen metabolism pathway incorporates the nitrogen into organic compounds via glutamine synthetase and glutamate synthase that convert ammonium ions into glutamine and glutamate. Different isoforms of glutamine synthetase and glutamate synthase exist, enabling plants to fine-tune nitrogen metabolism based on environmental cues. Under stressful conditions, nitric oxide has been found to enhance plant survival under drought stress. Furthermore, the interaction between salinity stress and nitrogen availability in plants has been studied, with nitric oxide identified as a potential mediator of responses to salt stress. Conversely, excessive use of nitrate fertilizers can lead to health and environmental issues. Therefore, alternative strategies, such as establishing nitrogen fixation in plants through diazotrophic microbiota, have been explored to reduce reliance on synthetic fertilizers. Ultimately, genomics can identify new genes related to nitrogen fixation, which could be harnessed to improve plant productivity.


Asunto(s)
Compuestos de Amonio , Nitratos , Nitratos/metabolismo , Nitrógeno/metabolismo , Glutamato-Amoníaco Ligasa/metabolismo , Óxido Nítrico/metabolismo , Glutamato Sintasa/metabolismo , Fertilizantes , Plantas/metabolismo , Proteínas de Transporte de Membrana/metabolismo , Suelo
10.
Nanoscale ; 15(36): 15000-15007, 2023 Sep 21.
Artículo en Inglés | MEDLINE | ID: mdl-37665054

RESUMEN

Among the various kinds of spin defects in hexagonal boron nitride (hBN), the negatively charged boron vacancy (VB-) spin defect that can be site-specifically generated is undoubtedly a potential candidate for quantum sensing, but its low quantum efficiency restricts its practical applications. Here, we demonstrate a robust enhancement structure called reflective dielectric cavity (RDC) with advantages including easy on-chip integration, convenient processing, low cost and suitable broad-spectrum enhancement for VB- defects. In the experiment, we used a metal reflective layer under the hBN flakes, filled with a transition dielectric layer in the middle, and adjusted the thickness of the dielectric layer to achieve the best coupling between RDC and spin defects in hBN. A remarkable 11-fold enhancement in the fluorescence intensity of VB- spin defects in hBN flakes can be achieved. By designing the metal layer into a waveguide structure, high-contrast optically detected magnetic resonance (ODMR) signal (∼21%) can be obtained. The oxide layer of the RDC can be used as the integrated material to implement secondary processing of micro-nano photonic devices, which means that it can be combined with other enhancement structures to achieve stronger enhancement. This work has guiding significance for realizing the on-chip integration of spin defects in two-dimensional materials.

11.
J Cancer Res Clin Oncol ; 149(16): 14761-14774, 2023 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-37589925

RESUMEN

BACKGROUND: Recently, the conversion therapies of FOLFOX-HAIC for patients with unresectable hepatocellular carcinoma (uHCC) have dramatically increased the tumor responses and conversion rate; thus, the prognosis of uHCC patients was expected to be prolonged. However, the postoperative recurrence of uHCC patients who successfully underwent conversion therapies stayed high. The present study evaluated the efficacy and safety of postoperatively adjuvant therapy in treating uHCC patients who received FOLFOX-HAIC-based conversion therapy. METHODS: In this real-world retrospective study, uHCC patients who received FOLFOX-HAIC-based conversion therapy were included. The recurrence-free survival (RFS), as primary outcomes, was compared between patients who received adjuvant therapy (AT group) or non-adjuvant therapy (nAT group) using survival analysis and Cox regression. Imbalances in baseline clinical features between the two groups were adjusted through propensity score matching (PSM) and inverse probability of treatment weighting (IPTW). RESULTS: Between January 2016 and December 2022, 204 uHCC patients who received FOLFOX-HAIC-based conversion therapy were included and assigned into AT group (n = 47) and nAT group (n = 157), respectively. The median RFS was significantly longer in the AT group than the nAT group before adjustment [19.2 vs. 10.8 months; hazard ratio (HR), 0.584; 95% CI, 0.383-0.892; P = 0.028], after PSM and after IPTW. Subsequent subgroup analyses revealed the RFS of adjuvant therapy was best in uHCC patients with younger than 60 years, macrovascular invasion, and positive hepatitis B surface antigen. CONCLUSION: Postoperatively, adjuvant therapy was associated with improved survival outcomes compared with non-adjuvant therapy after FOLFOX-HAIC-based conversion therapy among uHCC patients, especially for patients with macrovascular invasion and positive hepatitis B surface antigen.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/patología , Estudios Retrospectivos , Neoplasias Hepáticas/patología , Antígenos de Superficie de la Hepatitis B/uso terapéutico , Resultado del Tratamiento , Infusiones Intraarteriales
12.
Sci Total Environ ; 901: 166006, 2023 Nov 25.
Artículo en Inglés | MEDLINE | ID: mdl-37541506

RESUMEN

The rapid development of livestock and poultry farming in China has resulted in an increasing threat of water pollution. In particular, mitigating livestock-related pollutant discharges is a key issue for environmental sustainability, especially for inland surface water bodies. In order to ensure the effective control of pollution and the efficient utilization management of livestock manure, spatially explicit surveys of pollutant generation and discharge from the livestock sector must be performed. In the present study, we estimated the grid cell-level distributions in the generation and discharge of four typical pollutants (chemical oxygen demand, ammonium nitrogen, total nitrogen and total phosphorus) from the livestock sector across the country with a spatial resolution of 30 arc-seconds. The distributions were estimated using the most recent pollution source census data and multi-sourced ancillary materials by a dasymetric mapping approach. We further investigated the feasibility of the resource utilization of livestock manure by comparing manure-source nutrients with the carrying capacity of adjacent croplands. Our results show that low-intensive farming generated and discharged the majority of livestock farming pollution, with other cattle and pigs breeding identified as the two major sources of pollution from the livestock sector. Southwest, Central and East China suffered the highly densified pollutants generation and discharges. Furthermore, cropland exceeding its carrying capacity was concentrated in these regions. Our findings provide additional insights into livestock and poultry farming in the context of relocation, strengthening regulation, transforming breeding operations, and rationalizing the resource use of manure, all of which are important measures for the sustainable development of both agriculture and the environment.

14.
Gland Surg ; 12(4): 487-491, 2023 Apr 28.
Artículo en Inglés | MEDLINE | ID: mdl-37200922

RESUMEN

Background: In recent years, the use of robotic-assisted surgery has developed rapidly in China and is now widely used in many clinical fields. However, da Vinci robotic surgical instruments are more precise, expensive, and complex than ordinary laparoscopes, have less instrument configuration, involve restrictions on the duration of use, and have cleanliness requirements for supporting instruments. The purpose of this study was to analyze and summarize the current status of cleaning, disinfection, and maintenance of da Vinci robotic surgical instruments in China to improve the management of these devices. Methods: A questionnaire survey on the use of da Vinci robotic-assisted surgery at medical institutions in China was designed, distributed, and analyzed. The survey included items regarding general information, management of instrument handling personnel, instrument handling techniques, guidelines, and references for instrument handling. The results and conclusions were formed from the data generated by the analysis system and the answers of respondents to the open-ended questions. Results: (I) All surgical instruments used in domestic surgery practice were imported. There were 25 hospitals that conduct more than 500 da Vinci robotic-assisted surgeries every year. (II) In a relatively high proportion of medical institutions, nurses continued to be responsible for the processes of cleaning (46%), disinfection (66%), and low-temperature sterilization (50%). (III) A total of 62% of the surveyed institutions used fully manual methods for cleaning instruments, and 30% of the ultrasonic cleaning equipment in surveyed institutions did not comply with the standard. (IV) A total of 28% of surveyed institutions used only visual inspection to evaluate cleaning efficacy. Only 16-32% of surveyed institutions regularly used adenosine triphosphate (ATP), residual protein, and other methods to detect sterilization of cavities in instruments. (V) In 60% of the surveyed institutions, robotic surgical instruments have been damaged. Conclusions: Cleaning efficacy detection methods of robotic surgical instruments were not uniform and standardized. The management of device protection operations should be further regulated. In addition, further study of relevant guidelines and specifications as well as the training of operators is warranted.

15.
Angew Chem Int Ed Engl ; 62(27): e202303482, 2023 Jul 03.
Artículo en Inglés | MEDLINE | ID: mdl-37129053

RESUMEN

Although large amount of effort has been invested in combating thermal quenching that severely degrades the performance of luminescent materials particularly at high temperatures, not much affirmative progress has been realized. Herein, we demonstrate that the Frenkel defect formed via controlled annealing of Sc2 (WO4 )3 :Ln (Ln=Yb, Er, Eu, Tb, Sm), can work as energy reservoir and back-transfer the stored excitation energy to Ln3+ upon heating. Therefore, except routine anti-thermal quenching, thermally enhanced 415-fold downshifting and 405-fold upconversion luminescence are even obtained in Sc2 (WO4 )3 :Yb/Er, which has set a record of both the Yb3+ -Er3+ energy transfer efficiency (>85 %) and the working temperature at 500 and 1073 K, respectively. Moreover, this design strategy is extendable to other hosts possessing Frenkel defect, and modulation of which directly determines whether enhanced or decreased luminescence can be obtained. This discovery has paved new avenues to reliable generation of high-temperature luminescence.

16.
Nat Commun ; 14(1): 2893, 2023 May 20.
Artículo en Inglés | MEDLINE | ID: mdl-37210408

RESUMEN

Hexagonal boron nitride (hBN) is a remarkable two-dimensional (2D) material that hosts solid-state spins and has great potential to be used in quantum information applications, including quantum networks. However, in this application, both the optical and spin properties are crucial for single spins but have not yet been discovered simultaneously for hBN spins. Here, we realize an efficient method for arraying and isolating the single defects of hBN and use this method to discover a new spin defect with a high probability of 85%. This single defect exhibits outstanding optical properties and an optically controllable spin, as indicated by the observed significant Rabi oscillation and Hahn echo experiments at room temperature. First principles calculations indicate that complexes of carbon and oxygen dopants may be the origin of the single spin defects. This provides a possibility for further addressing spins that can be optically controlled.

17.
Chemistry ; 29(35): e202300391, 2023 Jun 22.
Artículo en Inglés | MEDLINE | ID: mdl-37069130

RESUMEN

A three-component umpolung cascade coupling reaction of phenols, C60 , and different nucleophiles which includes H2 O, alcohols, triphenylamines and carbazoles was developed. Furthermore, one-pot 1,4-bisphenol coupling on C60 has been realized by this method. This practical protocol features high chemo- and regioselectivity, wide substrate range, easy operation and low cost, thus providing a robust method for the one-pot synthesis of various unsymmetrical 1,4-[60]fullerephenols.

18.
BMC Cancer ; 23(1): 315, 2023 Apr 06.
Artículo en Inglés | MEDLINE | ID: mdl-37020199

RESUMEN

BACKGROUND: DNA methylation is one of the most promising biomarkers in predicting the prognosis of colorectal cancer (CRC). We aimed to develop a DNA methylation biomarker that could evaluate the prognosis of CRC. METHODS: A promising DNA methylation biomarker was developed by hypermethylated genes in cancer tissue that were identified from Illumina EPIC methylation arrays. A cohort comprising 30 pairs of snap-frozen tumor tissue and adjacent normal tissue was used for correlation analysis between the methylation and expression status of the marker. The other cohort comprising 254 formalin-fixed paraffin-embedded (FFPE) tumor tissue from 254 CRC patients was used for prognosis analysis. RESULTS: Regulating synaptic membrane exocytosis 2 (RIMS2) was hypermethylated and lowly expressed in CRC comparing to adjacent normal tissue. Hypermethylation of RIMS2 in CRC was correlated with less frequent KRAS mutant and high differentiation. RIMS2 promoter methylation showed independent predictive value for survival outcome (P = 0.015, HR 1.992, 95% CI [(1.140-3.48)]), and a combination of RIMS2 methylation with KRAS status could predict prognosis better. CONCLUSIONS: RIMS2 is frequently hypermethylated in CRC, which can silence the expression of RIMS2. RIMS2 methylation is a novel biomarker for predicting the prognosis of CRC.


Asunto(s)
Neoplasias Colorrectales , Humanos , Estadificación de Neoplasias , Neoplasias Colorrectales/patología , Proteínas Proto-Oncogénicas p21(ras)/genética , Pronóstico , Metilación de ADN , Carcinogénesis/genética , Transformación Celular Neoplásica/genética , Biomarcadores de Tumor/genética , Regulación Neoplásica de la Expresión Génica
19.
J Acoust Soc Am ; 153(4): 2131, 2023 Apr 01.
Artículo en Inglés | MEDLINE | ID: mdl-37092930

RESUMEN

Matched autoproduct processing (MAP) refers to a matched field processing (MFP) style array signal processing technique for passive source localization, which interrogates frequency-difference autoproduct instead of genuine acoustic pressure. Due to frequency downshifting, MAP is less sensitive to environmental mismatch, but it suffers from low spatial resolution and a low peak-to-sidelobe ratio of ambiguity surface. These source localization metrics are herein improved with coherent approaches. Specifically, the coherent normalized MFP is extended to coherent matched autoproduct processing (CMAP), a difference frequency coherent algorithm that exploits correlations among the autoproducts at various difference frequencies and eliminates the phase factor of the source spectrum for passive source localization. Phase-only coherent matched autoproduct processing is a CMAP derivation technique that only uses phase information. Through simulations in a Munk sound-speed profile environment, sensitivity analysis in the South China Sea environment, and high signal-to-noise ratio experimental measurements, these two algorithms are validated as compared to the conventional MFP and incoherent MAP. Simulation investigations demonstrate that difference frequency coherent algorithms can suppress sidelobes while simultaneously enhancing the localization resolution and robustness. The experimental results generally support the findings of the simulations.

20.
Front Oncol ; 13: 997776, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36865805

RESUMEN

Background: This study was intended to construct a brand new prognostic nomogram after combine clinical and pathological characteristics to increases prognostic value in patients with esophageal squamous cell carcinoma. Methods: A total of 1,634 patients were included. Subsequently, the tumor tissues of all patients were prepared into tissue microarrays. AIPATHWELL software was employed to explore tissue microarrays and calculate the tumor-stroma ratio. X-tile was adopted to find the optimal cut-off value. Univariate and multivariate Cox analyses were used to screen out remarkable characteristics for constructing the nomogram in the total populations. A novel prognostic nomogram with clinical and pathological characteristics was constructed on the basis of the training cohort (n=1,144). What's more performance was validated in the validation cohort (n=490). Clinical-pathological nomogram were assessed by concordance index, time-dependent receiver operating characteristic, calibration curve and decision curve analysis. Results: The patients can divide into two groups with cut-off value of 69.78 for the tumor-stroma ratio. It is noteworthy that the survival difference was noticeable (P<0.001). A clinical-pathological nomogram was constructed by combining clinical and pathological characteristics to predict the overall survival. In comparison with TNM stage, the concordance index and time-dependent receiver operating characteristic of the clinical-pathological nomogram showed better predictive value (P<0.001). High quality of calibration plots in overall survival was noticed. As demonstrated by the decision curve analysis, the nomogram has better value than the TNM stage. Conclusions: As evidently revealed by the research findings, tumor-stroma ratio is an independent prognostic factor in patients with esophageal squamous cell carcinoma. The clinical-pathological nomogram has an incremental value compared TNM stage in predicting overall survival.

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