Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 34
Filtrar
Mais filtros








Base de dados
Intervalo de ano de publicação
1.
World J Gastroenterol ; 30(15): 2118-2127, 2024 Apr 21.
Artigo em Inglês | MEDLINE | ID: mdl-38681983

RESUMO

BACKGROUND: During emergency endoscopic retrograde cholangiopancreatography (ERCP), the safety and feasibility of performing one-stage endoscopic treatment for patients with acute cholangitis (AC) due to choledocholithiasis are unclear. AIM: To investigate the safety and feasibility of one-stage endoscopic treatment for moderate to severe AC. METHODS: We enrolled all patients diagnosed with moderate to severe cholangitis due to common bile duct stones from January 2019 to July 2023. The outcomes were compared in this study between patients who underwent ERCP within 24 h and those who underwent ERCP 24 h later, employing a propensity score (PS) framework. Our primary outcomes were intensive care unit (ICU) admission rates, ICU length of stay, and duration of antibiotic use. RESULTS: In total, we included 254 patients and categorized them into two groups based on the time elapsed between admission and intervention: The urgent group (≤ 24 h, n = 102) and the elective group (> 24 h, n = 152). Ninety-three pairs of patients with similar characteristics were selected by PS matching. The urgent ERCP group had more ICU admissions (34.4% vs 21.5%, P = 0.05), shorter ICU stays (3 d vs 9 d, P < 0.001), fewer antibiotic use (6 d vs 9 d, P < 0.001), and shorter hospital stays (9 d vs 18.5 d, P < 0.001). There were no significant differences observed in adverse events, in-hospital mortality, recurrent cholangitis occurrence, 30-d readmission rate or 30-d mortality. CONCLUSION: Urgent one-stage ERCP provides the advantages of a shorter ICU stay, a shorter duration of antibiotic use, and a shorter hospital stay.


Assuntos
Colangiopancreatografia Retrógrada Endoscópica , Colangite , Coledocolitíase , Estudos de Viabilidade , Tempo de Internação , Pontuação de Propensão , Humanos , Feminino , Masculino , Coledocolitíase/cirurgia , Coledocolitíase/diagnóstico , Coledocolitíase/complicações , Colangiopancreatografia Retrógrada Endoscópica/efeitos adversos , Colangite/cirurgia , Colangite/etiologia , Idoso , Pessoa de Meia-Idade , Tempo de Internação/estatística & dados numéricos , Doença Aguda , Resultado do Tratamento , Estudos Retrospectivos , Índice de Gravidade de Doença , Unidades de Terapia Intensiva/estatística & dados numéricos , Antibacterianos/uso terapêutico , Idoso de 80 Anos ou mais
2.
Environ Sci Pollut Res Int ; 31(14): 21524-21544, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38396180

RESUMO

The European Council completed the legislative procedure to establish the Carbon Border Adjustment Mechanism (CBAM) on April 25, 2023, which will be launched in 2027. The iron and steel sector is the main target of the forthcoming CBAM due to the industry's energy-intensive consumption with high carbon dioxide (CO2) emissions. However, minimal existing research has been conducted in this regard. This study employs GTAP-e 11.0 and TOPSIS models to estimate the effects of CBAM implementation on the major nations around the world from 2027 to 2030, examining countries' GDP, social welfare, iron and steel production, trade balance, and CO2 emissions to the global environment. This study concludes: (1) The GDP and social welfare of important iron and steel trade partners throughout the world will be significantly impacted by the application of CBAM. Most nations, including those in the EU, will experience negative GDP effects, with China undergoing the most pronounced social welfare declines followed by India. In contrast, the EU27 will benefit the most in terms of social welfare, followed by the US, Japan, and Russia. (2) Iron and steel production will decrease in all countries outside the EU, but it will have a positive impact on the trade balance of most countries. (3) The CO2 emissions of all countries except for the EU and Japan will decrease, with a positive impact on preventing carbon leakage in the international iron and steel trade. (4) Comprehensive analysis demonstrates that the EU will benefit the most, and China will suffer the most from CBAM application. Based on the above conclusions, this study proposes corresponding policy recommendations.


Assuntos
Dióxido de Carbono , Ferro , Dióxido de Carbono/análise , Aço , China , Índia
3.
Small ; : e2311340, 2024 Feb 06.
Artigo em Inglês | MEDLINE | ID: mdl-38319021

RESUMO

Carrier regulation has proven to be an effective approach for optimizing the thermoelectric performance of materials. One common method to adjust the carrier concentration is through element doping. In the case of AgCuTe-based materials, it tends to form with cation vacancies, resulting in a high hole concentration and complex phase composition at low temperatures, which also hinders material stability. However, this also offers additional opportunities to manipulate the carrier concentration. In this study, the improved performance of AgCuTe through indium doping is reported, which leads to a reduction in hole concentration. In combination with a significant increase in the effective mass of the carriers, the enhanced Seebeck coefficient is also realized. Particularly, a notable improvement in power factor is observed in the hexagonal phase near room temperature. Furthermore, a lower electron thermal conductivity is achieved, contributing to an average figure of merit value of ≈1.21 (between 523 and 723 K). Additionally, the presence of indium inhibits the formation of the second phase and ensures a homogeneous phase distribution, which reduces the instability arising from phase transition. This work significantly enhances the potential of AgCuTe-based materials for low to medium-temperature applications.

4.
Bone Res ; 12(1): 2, 2024 01 15.
Artigo em Inglês | MEDLINE | ID: mdl-38221522

RESUMO

Reconstruction of irregular oral-maxillofacial bone defects with an inflammatory microenvironment remains a challenge, as chronic local inflammation can largely impair bone healing. Here, we used magnesium silicate nanospheres (MSNs) to load microRNA-146a-5p (miR-146a) to fabricate a nanobiomaterial, MSN+miR-146a, which showed synergistic promoting effects on the osteogenic differentiation of human dental pulp stem cells (hDPSCs). In addition, miR-146a exhibited an anti-inflammatory effect on mouse bone marrow-derived macrophages (BMMs) under lipopolysaccharide (LPS) stimulation by inhibiting the NF-κB pathway via targeting tumor necrosis factor receptor-associated factor 6 (TRAF6), and MSNs could simultaneously promote M2 polarization of BMMs. MiR-146a was also found to inhibit osteoclast formation. Finally, the dual osteogenic-promoting and immunoregulatory effects of MSN+miR-146a were further validated in a stimulated infected mouse mandibular bone defect model via delivery by a photocuring hydrogel. Collectively, the MSN+miR-146a complex revealed good potential in treating inflammatory irregular oral-maxillofacial bone defects.


Assuntos
MicroRNAs , Nanosferas , Camundongos , Animais , Humanos , MicroRNAs/genética , Osteogênese/genética , Inflamação/tratamento farmacológico , Regeneração Óssea/genética , Silicatos/farmacologia , Silicatos de Magnésio/farmacologia
5.
Oral Dis ; 30(2): 551-561, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-36648372

RESUMO

OBJECTIVE: The present study identified potentially pivotal miRNAs contributing to chondrogenic differentiation in temporomandibular joint suffering abnormal stress. MATERIALS AND METHODS: Sprague-Dawley rats were randomly divided into control and experimental unilateral mastication (EUM) group. Bone micro-structure parameters was detected by micro-CT, and FGF-1 and MMP-1 expression was examined by immunohistochemistry. Differentially expressed miRNAs of bilateral condyle cartilage were screened via miRNA microarray at 4- and 8-week EUM, then further verified using quantitative reverse-transcription PCR. Over-expression of five differentially expressed miRNAs in chondrocytes was triggered by transfecting miRNA mimics. The expression of MMP-13, Col-II, OPN, and Runx2 was verified by western blotting. RESULTS: Expressions of FGF-1 and MMP-1 in right condyles gradually increased from 2 to 6 weeks after EUM. A total of 20 differentially expressed miRNAs were regulated by EUM, which related to cell proliferation, invasion, and osteoblast differentiation pathways. The over-expression of miR-148a-3p and miR-1-3p led to down-regulation of Col-II, while MMP-13 and Runx2 were up-regulated by induction of hypotrophic differentiation or IL-1ß stimulation. These findings suggested that miR-148a-3p and miR-1-3p promote chondrogenic differentiation. CONCLUSIONS: Several pivotal miRNAs were found to be related to chondrogenic differentiation, which provides novel insight into pathogenic mechanisms of cartilage homeostasis.


Assuntos
MicroRNAs , Ratos , Animais , MicroRNAs/genética , Subunidade alfa 1 de Fator de Ligação ao Core , Metaloproteinase 13 da Matriz/genética , Metaloproteinase 1 da Matriz , Fator 1 de Crescimento de Fibroblastos , Mastigação , Ratos Sprague-Dawley , Cartilagem/metabolismo , Homeostase
6.
Small ; 20(12): e2307798, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37946398

RESUMO

P-type Sb2Te3 has been recognized as a potential thermoelectric material for applications in low-medium temperature ranges. However, its inherent high carrier concentration and lattice thermal conductivity led to a relatively low ZT value, particularly around room temperature. This study addresses these limitations by leveraging high-energy ball milling and rapid hot-pressing techniques to substantially enhance the Seebeck coefficient and power factor of Sb2Te3, yielding a remarkable ZT value of 0.55 at 323 K due to the donor-like effect. Furthermore, the incorporation of Nb─Ag co-doping increases hole concentration, effectively suppressing intrinsic excitations ≈548 K while maintaining the favorable power factor. Simultaneously, the lattice thermal conductivity can be significantly reduced upon doping. As a result, the ZT values of Sb2Te3-based materials attain an impressive range of 0.5-0.6 at 323 K, representing an almost 100% improvement compared to previous research endeavors. Finally, the ZT value of Sb1.97Nb0.03Ag0.005Te3 escalates to 0.92 at 548 K with a record average ZT value (ZTavg) of 0.75 within the temperature range of 323-573 K. These achievements hold promising implications for advancing the viability of V-VI commercialized materials for low-medium temperature application.

7.
J Zhejiang Univ Sci B ; 24(10): 853-867, 2023 Aug 07.
Artigo em Inglês, Chinês | MEDLINE | ID: mdl-37752088

RESUMO

Research in stomatology (dental medicine) continues to expand globally and is oriented towards solving clinical issues, focusing on clarifying the clinical relevance and potential mechanisms of oral|-|systemic connections via clinical epidemiology, oral microecological characterization, and the establishment of animal models. Interdisciplinary integration of materials science and tissue engineering with stomatology is expected to lead to the creation of innovative materials and technologies to better resolve the most prevalent and challenging clinical issues such as peri-implantitis, soft and hard tissue defects, and dentin hypersensitivity. With the rapid development of artificial intelligence (AI), 5th generation mobile communication technology (5G), and big data applications, "intelligent stomatology" is emerging to build models for better clinical diagnosis and management, accelerate the reform of education, and support the growth and advancement of scientific research. Here, we summarized the current research status, and listed the future prospects and limitations of these three aspects, aiming to provide a basis for more accurate etiological exploration, novel treatment methods, and abundant big data analysis in stomatology to promote the translation of research achievements into practical applications for both clinicians and the public.


Assuntos
Medicina Bucal , Animais , Inteligência Artificial
8.
Oral Dis ; 2023 Sep 03.
Artigo em Inglês | MEDLINE | ID: mdl-37660361

RESUMO

OBJECTIVE: To investigate and explain the beneficial effects of local intra-articular injection of Salubrinal on temporomandibular joint osteoarthritis (TMJOA) using a rabbit model of anterior disc displacement (ADD). METHODS: Rabbits were divided and subjected to surgical ADD. Salubrinal was administered by intra-articular injection in the TMJ every other day for 2 and 4 weeks after operation. Histological examination and TUNEL staining were then performed. Immunohistochemistry, quantitative real-time PCR, and Western blot analysis were employed to evaluate the expression of endoplasmic reticulum (ER) stress-related markers, catabolic factors, extracellular matrix proteins, inflammatory factors, and nuclear factor-kappa B (NF-κB) activation. RESULTS: In the ADD groups, we found that Salubrinal partly reversed condylar cartilage deterioration according to the histological analysis. Salubrinal reduced chondrocytes apoptosis while increased matrix components including Collagen II and Aggrecan. Meanwhile, Salubrinal downregulated the catabolic expression of MMP13, ADAMTS5, VEGF, TNF-α, and IL-1ß. We also observed that Salubrinal inhibited ER stress activation by reducing the expression of GRP78, CHOP, ATF4, and Caspase-12. Additionally, Salubrinal suppressed the phosphorylation of NF-κB. CONCLUSION: These results indicate that Salubrinal alleviates cartilage degradation following ADD, suggesting that intra-articular injection of Salubrinal is a potential therapeutic approach for preventing TMJOA.

9.
ACS Appl Mater Interfaces ; 15(31): 37554-37562, 2023 Aug 09.
Artigo em Inglês | MEDLINE | ID: mdl-37522843

RESUMO

Mg3(Sb1-xBix)2 alloy has been extensively studied in the last 5 years due to its exceptional thermoelectric (TE) performance. The absence of accurate force field for inorganic alloy compounds presents great challenges for computational studies. Here, we explore the atomic microstructure, thermal, and elastic properties of the Mg3(Sb1-xBix)2 alloy at different solution concentrations through atomic simulations with a highly accurate machine learning interatomic potential (ML-IAP). We find atomic local ordering in the optimized structure with the Bi-Bi pair inclined to join adjacent layers and Sb-Sb pair preferring to stay within the same layer. The thermal conductivity changes with the solution concentrations can be correctly predicted through ML-IAP-based molecular dynamics simulations. Spectral thermal conductance analysis shows that the continuous movement of low-frequency peak to high frequency is responsible for the reduction of the thermal conductivity upon alloying. Elastic calculations reveal that similar to the thermal conductivity, solid solution alloying can reduce the overall elastic properties at both Mg3Sb2 and Mg3Bi2 ends, while anisotropic behavior is clearly observed with linear interpolation relationship upon alloying along the interlayer direction and nonlinearity along the intralayer direction. Although the atomic local ordering shows little effects on the properties of the Mg3(Sb1-xBix)2 alloy with only two alloying elements, it possesses potential important impacts on multiprincipal element inorganic TE alloys. This work provides a recipe for computational studies on the TE alloy systems and thus can accelerate the discovery and optimization of TE materials with high TE performance.

10.
Sci Total Environ ; 897: 165475, 2023 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-37442472

RESUMO

Coal spontaneous combustion often wastes resources and causes environmental pollution. Rapid and accurate identification of high temperature areas in coal is essential to reducing such combustion and environmental pollution. The acoustic thermometry method has the benefits of large temperature measurement space, non-contact, and high interference resistance. Determining the attenuation characteristics of acoustic waves in loose coal is the basis and premise for realizing acoustic temperature measurement. Four types of bituminous coal were scanned by computer tomography equipment. A self-designed acoustic attenuation test device was used to test coal samples under different temperatures and particle sizes. The study result demonstrates that the distribution characteristics of loose coal voids are mainly related to the particle size. The smaller the particle size range, the more uniform the void distribution. As the size of the coal particles increases, the voids become larger. The acoustic attenuation coefficients of four coal samples showed an increasing trend as frequency increased. The influence of coal particle size distribution on the acoustic attenuation coefficient was greater than that of temperature and metamorphic degree. The peak values of coal sound attenuation for different particle sizes were around 400, 700, 1100, and 1600 Hz. This indicated that the distribution of voids was the main factor affecting the propagation of acoustic waves. By analysing the attenuation mechanism of the acoustic wave in loose coal, the attenuation of acoustic temperature measurement signal was caused by the combined effect of loose coal on acoustic wave absorption and scattering. The study results provide theoretical support for the realization of acoustic wave detection of high temperature point in loose coal spontaneous combustion.

11.
J Phys Chem Lett ; 14(29): 6532-6541, 2023 Jul 27.
Artigo em Inglês | MEDLINE | ID: mdl-37450690

RESUMO

Organic solar cells (OSCs) have attracted lots of attention owing to their low cost, lightweight, and flexibility properties. Nowadays, the performance of OSCs is continuously improving with the development of active layer materials. However, the traditional hole transport layer (HTL) material Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) presents insufficient conductivity and rapid degradation, which decreases the efficiency and stability of OSCs. To conquer the challenge, the two-dimensional (2D) graphitic carbon nitride (g-C3N4) nanomaterials incorporated into the PEDOT:PSS as hybrid HTL are reported. The addition of g-C3N4 into PEDOT:PSS enables the thickness of the HTL to decrease for enhancing the transmittance of the film and increase the conductivity of PEDOT:PSS. Thus, the device exhibts improved charge transport and suppressed carrier recombination, leading to the increase in short-circuit current density and power conversion efficiency of the devices. This work demonstrates that the incorporation of 2D g-C3N4 into PEDOT:PSS for D18:Y6 and PM6:L8-BO-based OSCs can significantly improve the device efficiency to 17.48% and 18.47% with the enhancement of 7.04% and 8.46%, respectively.

12.
ACS Appl Mater Interfaces ; 15(10): 12611-12621, 2023 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-36856515

RESUMO

Intensive efforts have been conducted to realize the reliable interfacial joining of thermoelectric materials and electrode materials with low interfacial contact resistance, which is an essential step to make thermoelectric materials into thermoelectric devices for industrial application. In this review, the roles of structural integrity, interdiffusion, and contact resistance in long-term reliabilities of thermoelectric modules are outlined first. Then interfacial reactions of near-room-temperature Bi2Te3-based thermoelectric materials and various electrode materials are reviewed comprehensively. We also summarized the joining behavior of the mid-temperature PbTe-based thermoelectric materials and commonly used electrode materials. Subsequently, for other thermoelectric materials systems, i.e., SiGe, CoSb3, and Mg3Sb2, previous attempts to join with some electrode materials are also recapitulated. Finally, some future prospects to further improve the joint reliability in thermoelectric device manufacturing are proposed. We believe that this review will provide guidance for preparing thermoelectric devices and optimizing thermoelectric device design.

13.
Animals (Basel) ; 13(2)2023 Jan 16.
Artigo em Inglês | MEDLINE | ID: mdl-36670855

RESUMO

BACKGROUND: Reptiles are asymptomatic carriers of Salmonella spp. Reptile-associated Salmonella infections have been noticed as a significant contributor to overall human salmonellosis. However, it remains unclear regarding the prevalence of reptile-associated Salmonella in China. METHODS: Fecal and gastrointestinal mucosal samples were taken from 104 snakes, 21 lizards, and 52 chelonians and cultured on selective medium. The positive clones were validated and annotated by biochemical screening and multiplex PCR verification. In addition, the antibiotic resistance of identified Salmonella isolates was detected and followed by cytotoxic activity detection on human colon cells via co-culturation. RESULTS: The overall prevalence of Salmonella in reptiles was 25.99%, with rates of 30.77%, 47.62%, and 7.69% in snakes, lizards, and chelonians, respectively. Further, all isolates showed variable drug-resistant activity to 18 antibiotics, of which 14 strains (30.43%) were resistant to more than eight kinds of antibiotics. More than half of isolated Salmonella strains were more toxic to host cells than the standard strain, SL1344. Whole genome sequencing (WGS) results showed that all lizard-associated strains belong to 4 serovar types, and 7 of them fall into the highly pathogenic serovars "Carmel" and "Pomona." CONCLUSIONS: Our results highlight the potential threat of zoonotic salmonellosis from captive reptiles in the Beijing area of China.

14.
PLoS One ; 17(8): e0271768, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35925968

RESUMO

Faced with the increasingly severe ecological environment, China promotes the construction of ecological civilization vigorously. Therefore, it is of great significance to adopt scientific, effective and comprehensive methods to evaluate development status of ecological civilization. Based on the panel data from 2010 to 2014, this paper employs GIS and AHP methods to dynamically examine the level of ecological civilization construction in Jiangxi Province. The results indicate that: (1) The ecological civilization construction in Jiangxi Province is 13.23% higher than the national average, whereas there is an imbalance in the development of different cities within the province; (2) The ecological civilization construction in the whole province rises first and then falls; (3) The performances of the cities vary in different dimensions of the construction of ecological civilization that cities in Jiangxi province perform well in the dimension of ecological environment, but perform poorly in the dimension of social development. Finally, we put forward policy recommendations for improving ecological environment to realize harmonious development between human and nature.


Assuntos
Civilização , Sistemas de Informação Geográfica , China , Cidades , Conservação dos Recursos Naturais , Ecossistema , Meio Ambiente , Humanos
15.
Chem Biodivers ; 19(8): e202200236, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35781793

RESUMO

A series of 4-oxo-4,5,6,7-tetrahydro-1H-pyrazolo[3,4-d]pyrimidine derivatives were designed and synthesized based on the fipronil low energy conformation by scaffold hopping strategy. Physicochemical properties calculation, insecticidal assay and binding mode studies were also performed. It was found that the target compounds displayed lower insecticidal activities than fipronil. The differences in binding modes between these compounds and fipronil may be the major reason for reduced insecticidal activities.


Assuntos
Inseticidas , Inseticidas/química , Inseticidas/farmacologia , Conformação Molecular , Oxotremorina/análogos & derivados , Pirimidinas/química , Pirimidinas/farmacologia , Relação Estrutura-Atividade
16.
J Mol Graph Model ; 116: 108257, 2022 11.
Artigo em Inglês | MEDLINE | ID: mdl-35816906

RESUMO

The honey bee, Apis mellifera, shows variation in sensitivity to imidacloprid and thiacloprid, which does not reside at the target site but rather in the rapidly oxidative metabolism mediated by P450s (such as a single P450, CYP9Q3). An in silico study was conducted to investigate the various metabolism of imidacloprid and thiacloprid. The binding potency of thiacloprid was stronger and a stable π-π interaction with Phe121 and the N-H⋯N hydrogen bond with Asn214 are found in the CYP9Q3-thiacloprid system but absent in imidacloprid, which might affect the potential metabolic activity. Moreover, the values of highest occupied molecular orbit (HOMO) energy and the vertical ionization potential (IP) of two compounds demonstrated that thiacloprid is more likely to oxidation. The findings revealed the probable binding modes of imidacloprid and thiacloprid with CYP9Q3 and might facilitate future design of the low bee toxicity neonicotinoid insecticides.


Assuntos
Sistema Enzimático do Citocromo P-450 , Nitrocompostos , Animais , Abelhas , Neonicotinoides/química , Neonicotinoides/toxicidade , Nitrocompostos/toxicidade , Tiazinas
17.
J Mol Graph Model ; 114: 108177, 2022 07.
Artigo em Inglês | MEDLINE | ID: mdl-35413658

RESUMO

The health of bee populations worldwide is affected by multiple factors, of which neonicotinoids are considered to be a main reason. Although most neonicotinoids are highly toxic to bees, some of them are relatively safe. To explore the molecular mechanism of these differences in toxicity, homology modelling, molecular docking and molecular dynamics simulations were applied to study the interactions between Apis mellifera (α8)2(ß1)3 nAChR and high bee-toxic neonicotinoid (imidacloprid, IMI), medium bee-toxic (thiacloprid, THI) and low bee-toxic butenolides (flupyradifurone, FPF). It was observed that three major interactions were similar across all systems, including water-bridge networks, π-π interactions and the polar interactions between the electron-withdrawing pharmacophores and the receptor. The calculated binding free energy was similar between IMI and THI. While FPF was the lowest bee-toxic, it displayed the strongest binding free energy value, the additional C-H⋯O H-bonds with Arg80 and Trp179 were the main reason. The bee toxicities of neonicotinoids and other nAChR modulators are not only determined by receptor affinities, but also by other factors (for example physicochemical properties and metabolic detoxification). All influencing factors should be fully considered in the future design of new eco-friendly insecticides that are safe for bees.


Assuntos
Inseticidas , Nitrocompostos , 4-Butirolactona/análogos & derivados , Animais , Abelhas , Inseticidas/química , Inseticidas/farmacologia , Simulação de Acoplamento Molecular , Neonicotinoides/química , Nitrocompostos/química , Piridinas
18.
Int Microbiol ; 25(3): 515-529, 2022 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-35156144

RESUMO

Kluyveromyces marxianus is expected to be used in the production of yeast extracts due to its good fermentation ability and nutritional properties. Yeast autolysis is a key process to produce yeast extract and vacuum negative pressure stress can be used as an effective way to assist autolysis. However, the molecular mechanism of initiating Kluyveromyces marxianus autolysis induced by vacuum negative pressure and the higher temperature is still unclear. In this study, RNA-seq technology was performed mainly to analyze autolytic processes in Kluyveromyces marxianus strains. Considerable differentially expressed genes (DEGs) of downregulation were significantly enriched in 7 Kyoto Encyclopedia of Genes and Genomes (KEGG) pathways related to synthesis and transport of RNA and ribosome, which indicated that abnormal protein translations had already occurred in autolytic process. Interestingly, due to obvious change of related DEGs, endoplasmic reticulum-associated degradation (ERAD) and autophagy were activated and cell wall integrity pathway was hindered. Under the continuous influence of the external stress environment, the long-term changes of the above pathways triggered a vicious circle of gradual damage to yeast cells, which is the main cause of yeast autolysis. These results may provide important clues for the in-depth interpretation of the yeast autolytic mechanism.


Assuntos
Kluyveromyces , Transcriptoma , Degradação Associada com o Retículo Endoplasmático , Fermentação , Kluyveromyces/genética , Kluyveromyces/metabolismo , Temperatura , Vácuo
19.
Am J Transl Res ; 13(7): 7882-7889, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-34377266

RESUMO

PURPOSE: To analyze the effects of different routes of dexmedetomidine administration on early cognitive function following inguinal hernia repair. METHODS: A total of 83 patients with pediatric inguinal hernias admitted to our hospital from January 2018 to October 2020 were divided into control group (CNG, n = 41) and observation group (OG, n = 42) by random number table. The OG was given 2 µg/kg of dexmedetomidine hydrochloride by intranasal administration, and the CNG was treated with 0.5 µg/kg of dexmedetomidine hydrochloride via intravenous (IV) infusion pump. The hemodynamics, condition of anesthesia, awakening, and safety were compared between the two groups. RESULTS: Systolic blood pressure and oxygen saturation levels at T1 and T2 in the OG were not different from those in the CNG (P > 0.05), and heart rates in the OG were all higher than those in the CNG (P < 0.05). The incidence of emergence agitation during awakening was 4.76% in the OG, which was lower than 21.95% compared with the CNG (P < 0.05). Ramsay sedation scores at 15 and 30 min after awakening in the OG were higher than those in the CNG, and PAED scores in the OG were lower than those in the CNG (P < 0.05). Cognitive, language, and motor scores in the OG were higher than those in the CNG at 3 days after surgery (P < 0.05), and the incidence of cognitive dysfunction was 4.76% in the OG at 3 days after surgery, which was lower compared with 21.95% in the CNG (P < 0.05). CONCLUSION: Application of dexmedetomidine hydrochloride by intranasal administration or intravenous infusion before induction can ensure rapid postoperative awakening of the children without causing significant fluctuations in blood pressure and oxygen saturation, and both methods have a high safety profile. However, intranasal administration results in more satisfactory sedation, less postoperative agitation upon awakening, and reduces postoperative cognitive dysfunction.

20.
Mol Cell Endocrinol ; 523: 111144, 2021 03 01.
Artigo em Inglês | MEDLINE | ID: mdl-33383107

RESUMO

In this study, we aimed to clarify the role of PIM-1 in papillary thyroid carcinoma (PTC) in vitro and investigate the relationship between PIM-1 and redox proteins (NOX4, SOD2, and GPX2) at the tissue and cellular levels. As a PIM-1 inhibitor, SGI-1776 inhibited cell proliferation, colony formation, migration and induced an increase in apoptosis and reactive oxygen species in two PTC cell lines (BCPAP and TPC-1). The expressions of PIM-1, SOD2 and GPX2 were downregulated after siNOX4 exposure. Immunohistochemistry in 120 PTC patients showed that all four proteins exhibited higher expression levels in PTC tissues than in adjacent normal tissues. PIM-1 expression was related to NOX4, SOD2, and GPX2 expressions. The Cancer Genome Atlas database analysis showed the significant correlation between the expression of NOX4 and PIM-1. Our results demonstrated that PIM-1 played an important oncogenic role in PTC carcinogenesis that may be related to oxidative stress.


Assuntos
Carcinogênese/patologia , Progressão da Doença , Oncogenes , Estresse Oxidativo , Proteínas Proto-Oncogênicas c-pim-1/metabolismo , Câncer Papilífero da Tireoide/genética , Neoplasias da Glândula Tireoide/genética , Apoptose/efeitos dos fármacos , Apoptose/genética , Carcinogênese/efeitos dos fármacos , Carcinogênese/genética , Linhagem Celular Tumoral , Movimento Celular/efeitos dos fármacos , Movimento Celular/genética , Proliferação de Células/efeitos dos fármacos , Proliferação de Células/genética , Bases de Dados Genéticas , Feminino , Regulação Neoplásica da Expressão Gênica/efeitos dos fármacos , Humanos , Imidazóis/farmacologia , Masculino , Pessoa de Meia-Idade , Proteínas de Neoplasias/genética , Proteínas de Neoplasias/metabolismo , Estresse Oxidativo/efeitos dos fármacos , Estresse Oxidativo/genética , Proteínas Proto-Oncogênicas c-pim-1/genética , Piridazinas/farmacologia , Espécies Reativas de Oxigênio/metabolismo , Câncer Papilífero da Tireoide/patologia , Neoplasias da Glândula Tireoide/patologia , Ensaio Tumoral de Célula-Tronco
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA