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1.
J Environ Manage ; 359: 121071, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38718608

RESUMEN

Particulate matter with an aerodynamic diameter of less than 1 µm (PM1.0) can be extremely hazardous to human health, so it is imperative to accurately estimate the spatial and temporal distribution of PM1.0 and analyze the impact of related policies on it. In this study, a stacking generalization model was trained based on aerosol optical depth (AOD) data from satellite observations, combined with related data affecting aerosol concentration such as meteorological data and geographic data. Using this model, the PM1.0 concentration distribution in China during 2016-2019 was estimated, and verified by comparison with ground-based stations. The coefficient of determination (R2) of the model is 0.94, and the root-mean-square error (RMSE) is 8.49 µg/m3, mean absolute error (MAE) is 4.10 µg/m3, proving that the model has a very high performance. Based on the model, this study analyzed the PM1.0 concentration changes during the heating period (November and December) in the regions where the "coal-to-gas" policy was implemented in China, and found that the proposed "coal-to-gas" policy did reduce the PM1.0 concentration in the implemented regions. However, the lack of natural gas due to the unreasonable deployment of the policy in the early stage caused the increase of PM1.0 concentration. This study can provide a reference for the next step of urban air pollution policy development.


Asunto(s)
Contaminantes Atmosféricos , Material Particulado , Material Particulado/análisis , China , Contaminantes Atmosféricos/análisis , Carbón Mineral , Monitoreo del Ambiente , Contaminación del Aire/análisis , Aerosoles/análisis
2.
Signal Transduct Target Ther ; 9(1): 101, 2024 Apr 20.
Artículo en Inglés | MEDLINE | ID: mdl-38643203

RESUMEN

Strategies to improve T cell therapy efficacy in solid tumors such as hepatocellular carcinoma (HCC) are urgently needed. The common cytokine receptor γ chain (γc) family cytokines such as IL-2, IL-7, IL-15 and IL-21 play fundamental roles in T cell development, differentiation and effector phases. This study aims to determine the combination effects of IL-21 in T cell therapy against HCC and investigate optimized strategies to utilize the effect of IL-21 signal in T cell therapy. The antitumor function of AFP-specific T cell receptor-engineered T cells (TCR-T) was augmented by exogenous IL-21 in vitro and in vivo. IL-21 enhanced proliferation capacity, promoted memory differentiation, downregulated PD-1 expression and alleviated apoptosis in TCR-T after activation. A novel engineered IL-21 receptor was established, and TCR-T armed with the novel engineered IL-21 receptors (IL-21R-TCR-T) showed upregulated phosphorylated STAT3 expression without exogenous IL-21 ligand. IL-21R-TCR-T showed better proliferation upon activation and superior antitumor function in vitro and in vivo. IL-21R-TCR-T exhibited a less differentiated, exhausted and apoptotic phenotype than conventional TCR-T upon repetitive tumor antigen stimulation. The novel IL-21 receptor in our study programs powerful TCR-T and can avoid side effects induced by IL-21 systemic utilization. The novel IL-21 receptor creates new opportunities for next-generation TCR-T against HCC.


Asunto(s)
Carcinoma Hepatocelular , Neoplasias Hepáticas , Humanos , Carcinoma Hepatocelular/genética , Carcinoma Hepatocelular/terapia , Carcinoma Hepatocelular/metabolismo , Subunidad gamma Común de Receptores de Interleucina/metabolismo , Receptores de Interleucina-21/genética , Receptores de Interleucina-21/metabolismo , Neoplasias Hepáticas/genética , Neoplasias Hepáticas/terapia , Neoplasias Hepáticas/metabolismo , Receptores de Antígenos de Linfocitos T/genética , Linfocitos T CD8-positivos
4.
Biosensors (Basel) ; 13(10)2023 Oct 23.
Artículo en Inglés | MEDLINE | ID: mdl-37887139

RESUMEN

Intensity interrogation-based surface plasmon resonance imaging (ISPRi) sensing has a simple schematic design and is the most widely used surface plasmon resonance technology at present. In this study, we report the successful development of a novel high-sensitivity ISPRi biosensor and its application for apoptosis detection in cancer cells. By optimizing the excitation wavelength and excitation angle, we achieved a refractive index resolution (RIR) of 5.20 × 10-6 RIU. Importantly, the biosensor has been tested and validated for high-throughput and label-free detection of activated caspase-3 with its specific inhibitor Z-DEVD-FMK in apoptotic cells. Therefore, this study describes a novel molecular imaging system to monitor apoptosis in cancers for disease diagnosis and/or evaluation of therapeutic efficacy of anti-cancer drugs.


Asunto(s)
Técnicas Biosensibles , Neoplasias , Humanos , Resonancia por Plasmón de Superficie/métodos , Técnicas Biosensibles/métodos , Neoplasias/diagnóstico , Refractometría , Apoptosis
5.
BMC Plant Biol ; 23(1): 428, 2023 Sep 15.
Artículo en Inglés | MEDLINE | ID: mdl-37710184

RESUMEN

BACKGROUND: Mulberry (Morus spp.) is an economically important woody plant, which has been used for sericulture (silk farming) for thousands of years. The genetic background of mulberry is complex due to polyploidy and frequent hybridization events. RESULTS: Comparative genomic in situ hybridization (cGISH) and self-GISH were performed to illustrate the chromosome constitution and genetic relationships of 40 mulberry accessions belonging to 12 species and three varietas in the Morus genus and containing eight different ploidy levels. We identified six homozygous cGISH signal patterns and one heterozygous cGISH signal pattern using four genomic DNA probes. Using cGISH and self-GISH data, we defined five mulberry sections (Notabilis, Nigra, Wittiorum, and Cathayana, all contained only one species; and Alba, which contained seven closely related species and three varietas, was further divided into two subsections) and proposed the genetic relationships among them. Differential cGISH signal patterns detected in section Alba allowed us to refine the genetic relationships among the closely related members of this section. CONCLUSIONS: We propose that GISH is an efficient tool to investigate the chromosome constitution and genetic relationships in mulberry. The results obtained here can be used to guide outbreeding of heterozygous perennial crops like mulberry.


Asunto(s)
Morus , Morus/genética , Genómica , Hibridación in Situ , Agricultura , Cromosomas
6.
Nat Commun ; 14(1): 4923, 2023 08 15.
Artículo en Inglés | MEDLINE | ID: mdl-37582961

RESUMEN

Base editing technology is an ideal solution for treating pathogenic single-nucleotide variations (SNVs). No gene editing therapy has yet been approved for eye diseases, such as retinitis pigmentosa (RP). Here, we show, in the rd10 mouse model, which carries an SNV identified as an RP-causing mutation in human patients, that subretinal delivery of an optimized dual adeno-associated virus system containing the adenine base editor corrects the pathogenic SNV in the neuroretina with up to 49% efficiency. Light microscopy showed that a thick and robust outer nuclear layer (photoreceptors) was preserved in the treated area compared with the thin, degenerated outer nuclear layer without treatment. Substantial electroretinogram signals were detected in treated rd10 eyes, whereas control treated eyes showed minimal signals. The water maze experiment showed that the treatment substantially improved vision-guided behavior. Together, we construct and validate a translational therapeutic solution for the treatment of RP in humans. Our findings might accelerate the development of base-editing based gene therapies.


Asunto(s)
Retinitis Pigmentosa , Ratones , Animales , Humanos , Retinitis Pigmentosa/genética , Retinitis Pigmentosa/terapia , Retina/patología , Electrorretinografía , Células Fotorreceptoras , Modelos Animales de Enfermedad , Fenotipo
7.
ACS Omega ; 8(30): 27398-27409, 2023 Aug 01.
Artículo en Inglés | MEDLINE | ID: mdl-37546655

RESUMEN

In order to address the low thermal efficiency of low-rank coal combustion and the accompanying serious environmental issues, formed coke was prepared using a carbonization consolidation method with low-rank coal semi-coke. The test for briquetting and carbonation consolidation conditions revealed that the optimal parameters were a briquetting pressure of 93.63 MPa, moisture content of 16%, Ca(OH)2 binder amount of 10%, and a CO2 concentration of 30% at 20 °C. Under these conditions and a carbonation consolidation time of 60 min, high-quality formed coke was produced, exhibiting a compressive strength of 1256.2 N/a, redrying strength of 286.2 N/a, and a dropping strength of 10.6 number/a. The combustion characteristics of the prepared formed coke were investigated, revealing that ignition temperatures (345.39 °C), burnout temperatures (495.57 °C), and peak of the maximum weight loss rate temperatures (437.93 °C) are slightly higher than those of bituminous coal. The low calorific value of the briquette was 20.4 MJ/kg. During the combustion process, the emission concentrations of SO2, NOX, and solid particles from the formed coke were significantly lower than those of bituminous coal, indicating that it is a cleaner energy source. Moreover, adding Ca(OH)2 effectively reduced SO2 emissions and achieved sulfur fixation and emission reduction.

8.
Clin Oral Investig ; 27(8): 4083-4106, 2023 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-37071220

RESUMEN

OBJECTIVES: Patients with hematological malignancies have dynamic changes in oral microbial communities before and after treatment. This narrative review describes the changes in oral microbial composition and diversity, and discusses an oral microbe-oriented strategy for oral disease management. MATERIALS AND METHODS: A literature search was performed in PubMed/Medline, Web of Science, and Embase for articles published between 1980 and 2022. Any articles on the changes in oral microbial communities in patients with hematological malignancies and their effects on disease progression and prognosis were included. RESULTS: Oral sample detection and oral microbial sequencing analysis of patients with hematological malignancies showed a correlation between changes in oral microbial composition and diversity and disease progression and prognosis. The possible pathogenic mechanism of oral microbial disorders is the impairment of mucosal barrier function and microbial translocation. Probiotic strategies, antibiotic strategies, and professional oral care strategies targeting the oral microbiota can effectively reduce the risk of oral complications and the grade of severity in patients with hematological malignancies. CLINICAL RELEVANCE: This review provides dentists and hematologists with a comprehensive understanding of the host-microbe associated with hematologic malignancies and oral disease management advice.


Asunto(s)
Neoplasias Hematológicas , Microbiota , Enfermedades de la Boca , Humanos , Enfermedades de la Boca/terapia , Neoplasias Hematológicas/terapia , Progresión de la Enfermedad , Manejo de la Enfermedad
9.
Adv Sci (Weinh) ; 10(7): e2205855, 2023 03.
Artículo en Inglés | MEDLINE | ID: mdl-36642845

RESUMEN

Synthetic biology has been represented by the creation of artificial life forms at the genomic scale. In this work, a CRISPR-based chromosome-doubling technique is designed to first construct an artificial diploid Escherichia coli cell. The stable single-cell diploid E. coli is isolated by both maximal dilution plating and flow cytometry, and confirmed with quantitative PCR, fluorescent in situ hybridization, and third-generation genome sequencing. The diploid E. coli has a greatly reduced growth rate and elongated cells at 4-5 µm. It is robust against radiation, and the survival rate after exposure to UV increased 40-fold relative to WT. As a novel life form, the artificial diploid E. coli is an ideal substrate for research fundamental questions in life science concerning polyploidy. And this technique may be applied to other bacteria.


Asunto(s)
Diploidia , Escherichia coli , Escherichia coli/genética , Hibridación Fluorescente in Situ , Poliploidía , Cromosomas de las Plantas
10.
Adv Healthc Mater ; 12(1): e2201856, 2023 01.
Artículo en Inglés | MEDLINE | ID: mdl-36226990

RESUMEN

Conductive scaffolds are of great value for constructing functional myocardial tissues and promoting tissue reconstruction in the treatment of myocardial infarction (MI). Here, a novel scaffold composed of silk fibroin and polypyrrole (SP50) with a typical sponge-like porous structure and electrical conductivity similar to the native myocardium is developed. An electroactive engineered cardiac patch (SP50 ECP) with a certain thickness is constructed by applying electrical stimulation (ES) to the cardiomyocytes (CMs) on the scaffold. SP50 ECP can significantly express cardiac marker protein (α-actinin, Cx-43, and cTnT) and has better contractility and electrical coupling performance. Following in vivo transplantation, SP50 ECP shows a notable therapeutic effect in repairing infarcted myocardium. Not only can SP50 ECP effectively improves left ventricular remodeling and restore cardiac functions, such as ejection function (EF), but more importantly, improves the propagation of electrical pulses and promote the synchronous contraction of CMs in the scar area with normal myocardium, effectively reducing the susceptibility of MI rats to arrhythmias. In conclusion, this study demonstrates a facile approach to constructing electroactive ECPs based on porous conductive scaffolds and proves the therapeutic effects of ECPs in repairing the infarcted heart, which may represent a promising strategy for MI treatment.


Asunto(s)
Infarto del Miocardio , Polímeros , Ratas , Animales , Polímeros/química , Pirroles/química , Infarto del Miocardio/terapia , Miocardio , Miocitos Cardíacos , Conductividad Eléctrica , Andamios del Tejido/química
11.
Int J Mol Sci ; 23(23)2022 Dec 06.
Artículo en Inglés | MEDLINE | ID: mdl-36499732

RESUMEN

The development of non-noble metal-based electrocatalysts with high performance for hydrogen evolution reaction and oxygen evolution reaction is highly desirable in advancing electrocatalytic water-splitting technology but proves to be challenging. One promising way to improve the catalytic activity is to tailor the d-band center. This approach can facilitate the adsorption of intermediates and promote the formation of active species on surfaces. This review summarizes the role and development of the d-band center of materials based on iron-series metals used in electrocatalytic water splitting. It mainly focuses on the influence of the change in the d-band centers of different composites of iron-based materials on the performance of electrocatalysis. First, the iron-series compounds that are commonly used in electrocatalytic water splitting are summarized. Then, the main factors affecting the electrocatalytic performances of these materials are described. Furthermore, the relationships among the above factors and the d-band centers of materials based on iron-series metals and the d-band center theory are introduced. Finally, conclusions and perspectives on remaining challenges and future directions are given. Such information can be helpful for adjusting the active centers of catalysts and improving electrochemical efficiencies in future works.


Asunto(s)
Hierro , Agua , Metales , Adsorción , Hidrógeno
12.
Int Immunopharmacol ; 113(Pt A): 109323, 2022 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-36279666

RESUMEN

BACKGROUND: Nasopharyngeal carcinoma (NPC) is a malignant tumor with high incidence. Notoginsenoside R1 (NGR1) is the main active compound of total Panax notoginseng saponin, and has multiple anti-tumor effects. This study aimed to investigate the effect and mechanism of NGR1 in NPC. MATERIALS: NPC cells were treated with different doses of NGR1. The NGR1 function in NPC was evaluated using Cell Counting Kit-8, Transwell, Western blot, flow cytometry, immunofluorescence assay, and quantitative real-time PCR. Meanwhile, the NGR1 mechanism in NPC was assessed by rescue experiments. Furthermore, the NGR1 function in vivo was determined by constructing an NPC xenotransplantation model, TUNEL, and immunohistochemistry assays. RESULTS: NGR1 repressed NPC cell growth and invasion but facilitated NPC cell apoptosis and oxidative stress. Also, NGR1 alleviated inflammation in NPC cells. Mechanistically, NGR1 restrained NPC cell growth and induced oxidative stress in NPC cells, while these effects were abolished after lipopolysaccharide (an activator of the TRAF6/NF-κB pathway) treatment, implying that NGR1 reduced NPC cell growth and induced oxidative stress in NPC cells by the inactivation of TRAF6/NF-κB axis. Moreover, in vivo studies further proved the palliative effect of NGR1 on NPC. CONCLUSION: NGR1 inhibited NPC cell growth and induced oxidative stress in NPC cells by inactivating TRAF6/NF-κB axis.


Asunto(s)
Ginsenósidos , Carcinoma Nasofaríngeo , Neoplasias Nasofaríngeas , Humanos , Ginsenósidos/farmacología , Ginsenósidos/uso terapéutico , Lipopolisacáridos , Carcinoma Nasofaríngeo/tratamiento farmacológico , Neoplasias Nasofaríngeas/tratamiento farmacológico , FN-kappa B/metabolismo , Estrés Oxidativo , Factor 6 Asociado a Receptor de TNF/metabolismo , Microambiente Tumoral , Animales
13.
Eur J Immunol ; 52(8): 1369-1371, 2022 08.
Artículo en Inglés | MEDLINE | ID: mdl-35689391

RESUMEN

Higher frequencies of polyfunctional PD1+ CD8+ T cells exhibited a stronger capacity to kill tumor cells in vitro and in vivo experiments. These results suggested that peripheral polyfunctional PD1+ CD8+ T cells demonstrated strong immune protection. This study also provided a potential combined treatment strategy with anti-PD1 and CAR-T therapy.


Asunto(s)
Carcinoma de Pulmón de Células no Pequeñas , Neoplasias Pulmonares , Linfocitos T CD8-positivos , Carcinoma de Pulmón de Células no Pequeñas/terapia , Humanos , Receptor de Muerte Celular Programada 1
14.
Bioengineered ; 13(5): 12912-12926, 2022 05.
Artículo en Inglés | MEDLINE | ID: mdl-35609310

RESUMEN

Oxymatrine (OMT) has exhibited an anti-cancer role in human cancers, including cervical cancer (CC). The dysregulated circular RNAs (circRNAs) are key regulators in cancer biology, and circ_0008460 was upregulated in CC. This study was performed to investigate the circRNA-based molecular mechanism for OMT in CC. RNA detection for circ_0008460, microRNA-197-3p (miR-197-3p), or ribonucleotide reductase subunit M2 (RRM2) was completed using reverse transcription-quantitative polymerase chain reaction assay. Cell behaviors were assessed by Cell Counting Kit-8 assay for cell viability, colony formation assay or Edu assay for cell proliferation, flow cytometry for cell apoptosis, and wound healing assay/transwell assay for migration/invasion. Protein expression examination was conducted using western blot. Dual-luciferase reporter assay and RNA pull-down assay were applied to confirm target binding. Tumor xenograft assay was performed for OMT research in vivo. OMT induced circ_0008460 downregulation in CC cells. OMT-induced inhibitory effects on cell growth, migration, and invasion but promoting effect on cell apoptosis were attenuated by circ_0008460. Circ_0008460 directly interacted with miR-197-3p, and OMT inhibited malignant behaviors of CC cells via mediating circ_0008460/miR-197-3p axis. RRM2 acted as a target for miR-197-3p and circ_0008460 affected the RRM2 level through absorbing miR-197-3p. OMT upregulated miR-197-3p to inhibit RRM2 expression to impede CC cell development. CC tumorigenesis was suppressed by OMT via targeting circ_0008460/miR-197-3p/RRM2 axis in vivo. These results suggested that OMT restrained CC cell progression in vitro and tumor growth in vivo by downregulating circ_0008460 to mediate miR-197-3p/RRM2 axis.


Asunto(s)
MicroARNs , Neoplasias del Cuello Uterino , Alcaloides , Proliferación Celular/genética , Femenino , Humanos , MicroARNs/genética , MicroARNs/metabolismo , Quinolizinas , ARN Circular/genética , Neoplasias del Cuello Uterino/genética , Neoplasias del Cuello Uterino/patología
15.
Dent Mater ; 38(6): 1004-1014, 2022 06.
Artículo en Inglés | MEDLINE | ID: mdl-35461699

RESUMEN

OBJECTIVES: Metallic element release during implant placement can lead to mucositis and peri-implantitis. Here, using ex vivo porcine mandibles, the release of metallic elements into the surrounding bone with different material and geometrical designs was quantified. METHODS: Implants from BioHorizons® and Straumann® (Bone level, tapered/cylindrical, 3/4 mm body diameter, Ti-CP4/Ti-6Al-4V/Ti-15Zr) systems were used. Micro computed tomography and inductively coupled plasma optical emission spectroscopy was used to visualise and quantify metallic elements in bone, following acid digestion. Implant surfaces were examined with scanning electron microscopy and internalization of implant particles by human gingival fibroblasts (HGFs) and RAW 264.7 macrophages were demonstrated in vitro. RESULTS: Implants with wider body diameters resulted in higher metallic element release. Ti-6Al-4V implants released significantly more metallic elements in comparison to both Ti-CP4 and Ti-15Zr devices with similar design and dimensions. Tapered Ti-CP4 implants released less compared to those with cylindrical design. Al three types of particles were internalized by HGFs and RAW 264.7. SIGNIFICANCE: Ti-CP4 and Ti-15Zr appear to be more suitable materials, however, further studies are required to elucidate the biological effects of the fine particles and/or metallic species from dental implants. Authors would like to raise the awareness in the dental profession community that careful evaluation of the materials used in dental implants and the potential risks of the individual constituents of any alloy are needed. The potential cytotoxicity of Ti-6Al-4V implant particles should be highlighted. Further investigations on the biological effect of the fine particles or metallic species released from dental implants are also needed.


Asunto(s)
Implantes Dentales , Aleaciones , Animales , Microscopía Electrónica de Rastreo , Propiedades de Superficie , Porcinos , Titanio/química , Microtomografía por Rayos X
16.
Biomater Adv ; 133: 112610, 2022 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-35042635

RESUMEN

The cellular response of murine primary macrophages to monodisperse strontium containing bioactive glass nanoparticles (SrBGNPs), with diameters of 90 ± 10 nm and a composition (mol%) of 88.8 SiO2-1.8CaO-9.4SrO (9.4% Sr-BGNPs) was investigated for the first time. Macrophage response is critical as applications of bioactive nanoparticles will involve the nanoparticles circulating in the blood stream and macrophages will be the first cells to encounter the particles, as part of inflammatory response mechanisms. Macrophage viability and total DNA measurements were not decreased by particle concentrations of up to 250 µg/mL. The Sr-BGNPs were actively internalised by the macrophages via formation of endosome/lysosome-like vesicles bordered by a membrane inside the cells. The Sr-BGNPs degraded inside the cells, with the Ca and Sr maintained inside the silica network. When RAW264.7 cells were incubated with Sr-BGNPs, the cells were polarised towards the pro-regenerative M2 population rather than the pro-inflammatory M1 population. Sr-BGNPs are potential biocompatible vehicles for therapeutic cation delivery for applications in bone regeneration.


Asunto(s)
Nanopartículas , Estroncio , Animales , Vidrio , Macrófagos , Ratones , Dióxido de Silicio , Estroncio/farmacología
17.
Front Endocrinol (Lausanne) ; 13: 1074176, 2022.
Artículo en Inglés | MEDLINE | ID: mdl-36589821

RESUMEN

Introduction: Different opinions exist about the role of subchondral bone in osteoarthritis (OA), probably because subchondral bone has different effects on cartilage degeneration in OA induced by different pathologies. Animal studies to illustrate the role of subchondral bone in cartilage degeneration were mostly based on post-traumatic OA (PT-OA). Postmenopausal women experience a much higher occurrence of OA than similar-aged men. The physiological changes and pathogenesis of the osteochondral unit in ovariectomy-induced OA (OVX-OA) might be distinct from other types of OA. Methods: The osteochondral alterations of post-traumatic OA (PT-OA) and OVX-OA at week 9 after surgery were compared. Then the alterations of osteochondral units in OVX-OA rats were tracked over time for the designed groups: Sham, OVX and OVX rats treated with estrogen (OVX+E). DXA, micro-CT, and histochemical staining were performed to observe alterations in osteochondral units. Results: Rapid cartilage degeneration and increased bone formation were observed in PT-OA, while only mild cartilage erosion and significant bone loss were observed in OVX-OA at week 9 after surgery. Subchondral bone degradation preceded cartilage degeneration by 6 weeks in OVX-OA. TGF-ß expression was downregulated in the osteochondral unit of OVX rats. Estrogen supplementation inhibited subchondral bone loss, cartilage degradation and TGF-ß expression decrease. Discussion: This research demonstrated the distinct behaviors of the osteochondral unit and the critical role of subchondral bone in early OVX-OA compared with PT-OA. Inhibiting subchondral bone catabolism at the early stage of OVX-OA could be an effective treatment for post-menopausal OA. Based on the results, estrogen supplementation and TGF-ß modulation at the early stage are both potential therapies for post-menopausal OA.


Asunto(s)
Cartílago Articular , Osteoartritis , Factor de Crecimiento Transformador beta , Animales , Femenino , Ratas , Huesos/metabolismo , Cartílago Articular/metabolismo , Cartílago Articular/patología , Estrógenos/metabolismo , Osteoartritis/etiología , Osteoartritis/metabolismo , Osteoartritis/patología , Osteoartritis/terapia , Ovariectomía/efectos adversos , Factor de Crecimiento Transformador beta/genética , Factor de Crecimiento Transformador beta/metabolismo , Heridas y Lesiones/complicaciones
18.
BDJ Open ; 7(1): 30, 2021 Aug 12.
Artículo en Inglés | MEDLINE | ID: mdl-34385413

RESUMEN

BACKGROUND: Immediate loading is an attractive option for avoiding secondary surgery. However, it is unclear whether it provides a better aesthetic outcome compared to conventional loading with implants placed in healed ridges. AIMS: To compare the aesthetic outcomes of immediately and conventionally loaded single implants in healed anterior maxillary ridges. METHODOLOGY: A systematic review using PICO was conducted. EMBASE, MEDLINE and DoSS databases were searched. The Cochrane Risk of Bias tool for Randomised Controlled Trials and the Effective Public Health Practice Project tool for other study designs were used for quality appraisal. A narrative synthesis was undertaken. RESULTS: A total of 622 articles were identified. After screening, a total of five papers were included. Results indicated no statistically significant difference in pink or white aesthetic scores between the immediate and conventional loading groups at 1- and 5-year review and the Papilla Index at the 1-year review. CONCLUSION: Within the limitations of this review, immediate loading of single implants provides a comparable aesthetic outcome to conventional loading in healed ridges of the anterior maxillary.

19.
Clin Cancer Res ; 27(15): 4186-4194, 2021 08 01.
Artículo en Inglés | MEDLINE | ID: mdl-34083231

RESUMEN

PURPOSE: Previous studies suggest that a cumulative cisplatin dose of 200 mg/m2 might be adequate in the intensity-modulated radiation therapy (IMRT) era for locoregionally advanced nasopharyngeal carcinoma (LANPC). However, two cycles of once-every-3-weeks cisplatin at 100 mg/m2 has never been prospectively compared with standard once-a-week cisplatin regimen. PATIENTS AND METHODS: This trial was conducted at three hospitals from 2011 to 2016. Patients who met the eligibility criteria were recruited (ChiCTR-TRC-12001979) and randomly assigned (1:1) via a computer-generated sequence to receive once-every-3-weeks cisplatin at 100 mg/m2 for two cycles or once-a-week cisplatin at 40 mg/m2 for six cycles concurrently with IMRT. Primary endpoint was failure-free survival and between-group absolute difference of 10% as the noninferiority margin. RESULTS: A total of 510 patients were enrolled. Median follow-up time was 58.3 months with 85.4% of 3-year failure-free survival in the once-every-3-weeks group and 85.6% in the once-a-week group. An absolute difference of -0.2% (95% confidence interval, -6.3 to 5.9; P noninferiority = 0.0016). Acute toxicities of grade 3 or higher occurred in 55.8% in the once-every-3-weeks group and 66.3% in the once-a-week group (P = 0.015). The most common acute toxicities were hematologic abnormalities, including leukopenia (16% vs. 27%; P = 0.0022) and thrombocytopenia (1% vs. 5%; P = 0.015). The late grade 3-4 auditory loss rate was significantly lower in the once-every-3-weeks group than the once-a-week group (6% vs. 13%; P = 0.0039). CONCLUSIONS: Once-every-3-weeks cisplatin as concurrent chemoradiotherapy is noninferior to once-a-week cisplatin in the treatment efficacy in the LANPC. Although both regimens are well tolerated, severe acute toxicities and late-onset auditory loss are higher in the once-a-week group.


Asunto(s)
Antineoplásicos/administración & dosificación , Cisplatino/administración & dosificación , Carcinoma Nasofaríngeo/tratamiento farmacológico , Neoplasias Nasofaríngeas/tratamiento farmacológico , Adulto , Anciano , Esquema de Medicación , Femenino , Humanos , Masculino , Persona de Mediana Edad , Carcinoma Nasofaríngeo/patología , Neoplasias Nasofaríngeas/patología , Estadificación de Neoplasias , Adulto Joven
20.
Front Mol Biosci ; 8: 683240, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34124163

RESUMEN

Background: Hepatocellular carcinoma (HCC) is a tumor with high morbidity and high mortality worldwide. DNA methylation, one of the most common epigenetic changes, might serve a vital regulatory role in cancer. Methods: To identify categories based on DNA methylation data, consensus clustering was employed. The risk signature was yielded by systematic bioinformatics analyses based on the remarkably methylated CpG sites of cluster 1. Kaplan-Meier analysis, variable regression analysis, and ROC curve analysis were further conducted to validate the prognosis predictive ability of risk signature. Gene set enrichment analysis (GSEA) was performed for functional annotation. To uncover the context of tumor immune microenvironment (TIME) of HCC, we employed the ssGSEA algorithm and CIBERSORT method and performed TIMER database exploration and single-cell RNA sequencing analysis. Additionally, quantitative real-time polymerase chain reaction was employed to determine the LRRC41 expression and preliminarily explore the latent role of LRRC41 in prognostic prediction. Finally, mutation data were analyzed by employing the "maftools" package to delineate the tumor mutation burden (TMB). Results: HCC samples were assigned into seven subtypes with different overall survival and methylation levels based on 5'-cytosine-phosphate-guanine-3' (CpG) sites. The risk prognostic signature including two candidate genes (LRRC41 and KIAA1429) exhibited robust prognostic predictive accuracy, which was validated in the external testing cohort. Then, the risk score was significantly correlated with the TIME and immune checkpoint blockade (ICB)-related genes. Besides, a prognostic nomogram based on the risk score and clinical stage presented powerful prognostic ability. Additionally, LRRC41 with prognostic value was corroborated to be closely associated with TIME characterization in both expression and methylation levels. Subsequently, the correlation regulatory network uncovered the potential targets of LRRC41 and KIAA1429. Finally, the methylation level of KIAA1429 was correlated with gene mutation status. Conclusion: In summary, this is the first to identify HCC samples into distinct clusters according to DNA methylation and yield the CpG-based prognostic signature and quantitative nomogram to precisely predict prognosis. And the pivotal player of DNA methylation of genes in the TIME and TMB status was explored, contributing to clinical decision-making and personalized prognosis monitoring of HCC.

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