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1.
Int J Biol Macromol ; 272(Pt 1): 132799, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38830496

RESUMO

Peritrophic membrane (PM) is a pellicle structure present in the midgut of some invertebrates, such as insects and crustaceans. It could isolate harmful components and pathogens in food from intestinal epithelial cells; and it also plays a role in improving digestion and absorption efficiency. So PM is important for survival of its owner. In current study, 44 PM proteins were identified in Litopenaeus vannamei by PM proteome analysis. Among these PM proteins, the Peritrophin-44 homologous protein (LvPT44) was further studied. Chitin-binding assay indicated that LvPT44 could bind to colloidal chitin, and immunoeletron microscopy analysis shown that it was located to PM of L. vannamei. Furthermore, LvPT44 promoter was found to be activated by L. vannamei STAT and c-Jun. Besides, LvPT44 was induced by ER-stress as well as white spot syndrome virus infection. Knocked-down expression of LvPT44 by RNA inference increased the cumulative mortality of shrimp that caused by ER-stress or white spot syndrome virus. These results suggested that LvPT44 has an important role in disease resistance.


Assuntos
Resistência à Doença , Penaeidae , Vírus da Síndrome da Mancha Branca 1 , Animais , Penaeidae/genética , Penaeidae/virologia , Penaeidae/metabolismo , Resistência à Doença/genética , Vírus da Síndrome da Mancha Branca 1/genética , Proteínas de Artrópodes/genética , Proteínas de Artrópodes/metabolismo , Quitina/metabolismo , Regiões Promotoras Genéticas/genética , Regulação da Expressão Gênica
2.
Vascular ; : 17085381241257316, 2024 May 26.
Artigo em Inglês | MEDLINE | ID: mdl-38798059

RESUMO

BACKGROUND: Successful revascularization of the lower extremity is key to avoiding amputation in patients with subacute limb ischemia. Percutaneous deep vein arterialization (DVA) is a novel endovascular technique which allows the shunting of blood through an arteriovenous fistula and native vein into the lower limb, typically employed in no-option chronic limb-threatening ischemia. METHOD: We present a case illustrating the unconventional use of DVA for limb salvage in a patient presenting with subacute limb ischemia refractive to surgical treatment, endovascular revascularization, and medical therapy. RESULT AND CONCLUSION: The arteriovenous anastomosis allowed for the reconstitution of arterial inflow to the patient's foot, thereby avoiding major limb amputation. CONCLUSION: The conventional knowledge that DVA neo-conduits require maturation limiting its role in the treatment of subacute limb ischemia is challenged. However, further research is needed to establish its role and effectiveness for subacute limb ischemia.

3.
ACS Appl Mater Interfaces ; 16(23): 29716-29727, 2024 Jun 12.
Artigo em Inglês | MEDLINE | ID: mdl-38814480

RESUMO

The emergence of XBB.1.16 has gained rapid global prominence. Previous studies have elucidated that the infection of SARS-CoV-2 induces alterations in the mitochondrial integrity of host cells, subsequently influencing the cellular response to infection. In this study, we compared the differences in infectivity and pathogenicity between XBB.1.16 and the parental Omicron sublineages BA.1 and BA.2 and assessed their impact on host mitochondria. Our findings suggest that, in comparison with BA.1 and BA.2, XBB.1.16 exhibits more efficient spike protein cleavage, more efficient mediating syncytia formation, mild mitochondriopathy, and less pathogenicity. Altogether, our investigations suggest that, based on the mutation of key sites, XBB.1.16 exhibited enhanced infectivity but lower pathogenicity. This will help us to further investigate the biological functions of key mutation sites.


Assuntos
COVID-19 , Mitocôndrias , SARS-CoV-2 , Glicoproteína da Espícula de Coronavírus , SARS-CoV-2/genética , SARS-CoV-2/metabolismo , SARS-CoV-2/patogenicidade , Glicoproteína da Espícula de Coronavírus/genética , Glicoproteína da Espícula de Coronavírus/metabolismo , Glicoproteína da Espícula de Coronavírus/química , Humanos , COVID-19/virologia , Mitocôndrias/metabolismo , Animais , Mutação , Chlorocebus aethiops , Células Vero , Camundongos , Células HEK293
4.
Fish Shellfish Immunol ; 149: 109528, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38570119

RESUMO

Stimulator of interferon genes (STING) has been demonstrated as a critical mediator in the innate immune response to cytosolic DNA and RNA derived from different pathogens. While the role of Micropterus salmoides STING (MsSTING) in largemouth bass virus is still unknown. In this study, RT-qPCR assay and Western-blot assay showed that the expression levels of MsSTING and its downstream genes were up-regulated after LMBV infection. Pull down experiment proved that a small peptide called Fusion peptide (FP) that previously reported to target to marine and human STING as a selective inhibitor also interacted with MsSTING in vitro. Comparing with the RNA-seq of Largemouth bass infected with LMBV singly, 326 genes were significantly up-regulated and 379 genes were significantly down-regulated in the FP plus LMBV group in which Largemouth bass was treatment with FP before LMBV-challenged. KEGG analysis indicated that the differentially expressed genes (DEGs) were mainly related to signaling transduction, infectious disease viral, immune system and endocrine system. Besides, the survival rate of LMBV-infected largemouth bass was highly decreased following FP treatment. Taken together, our study showed that MsSTING played an important role in immune response against LMBV infection.


Assuntos
Bass , Doenças dos Peixes , Proteínas de Peixes , Imunidade Inata , Animais , Doenças dos Peixes/imunologia , Doenças dos Peixes/virologia , Bass/imunologia , Bass/genética , Proteínas de Peixes/genética , Proteínas de Peixes/imunologia , Imunidade Inata/genética , Infecções por Vírus de DNA/imunologia , Infecções por Vírus de DNA/veterinária , Regulação da Expressão Gênica/imunologia , Regulação da Expressão Gênica/efeitos dos fármacos , Ranavirus/fisiologia , Proteínas de Membrana/genética , Proteínas de Membrana/imunologia
5.
J Mater Sci Mater Med ; 35(1): 16, 2024 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-38489121

RESUMO

Treatment of bone defects remains crucial challenge for successful bone healing, which arouses great interests in designing and fabricating ideal biomaterials. In this regard, the present study focuses on developing a novel fluffy scaffold of poly Lactide-co-glycolide (PLGA) composites with hydroxyapatite (HA) scaffold used in bone defect repair in rabbits. This fluffy PLGA/HA composite scaffold was fabricated by using multi-electro-spinning combined with biomineralization technology. In vitro analysis of human bone marrow mesenchymal stem cells (BMSCs) seeded onto fluffy PLGA/HA composite scaffold showed their ability to adhere, proliferate and cell viability. Transplant of fluffy PLGA/HA composite scaffold in a rabbit model showed a significant increase in mineralized tissue production compared to conventional and fluffy PLGA/HA composite scaffold. These findings are promising for fluffy PLGA/HA composite scaffolds used in bone defects.


Assuntos
Durapatita , Alicerces Teciduais , Animais , Humanos , Coelhos , Copolímero de Ácido Poliláctico e Ácido Poliglicólico , Materiais Biocompatíveis , Biomineralização , Osteogênese
6.
Toxicol Appl Pharmacol ; 486: 116914, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38522585

RESUMO

Ferroptosis has been shown to be involved in carbon tetrachloride (CCl4)-induced acute liver injury (ALI). The mitochondrion-targeted antioxidant MitoQ can eliminate the production of mitochondrial reactive oxygen species (mtROS). This study investigated the role of MitoQ in CCl4-induced hepatocytic ferroptosis and ALI. MDA and 4HNE were elevated in CCl4-induced mice. In vitro, CCl4 exposure elevated the levels of oxidized lipids in HepG2 cells. Alterations in the mitochondrial ultrastructure of hepatocytes were observed in the livers of CCl4-evoked mice. Ferrostatin-1 (Fer-1) attenuated CCl4-induced hepatic lipid peroxidation, mitochondrial ultrastructure alterations and ALI. Mechanistically, acyl-CoA synthetase long-chain family member 4 (ACSL4) was upregulated in CCl4-exposed human hepatocytes and mouse livers. The ACSL4 inhibitor rosiglitazone alleviated CCl4-induced hepatic lipid peroxidation and ALI. ACSL4 knockdown inhibited oxidized lipids in CCl4-exposed human hepatocytes. Moreover, CCl4 exposure decreased the mitochondrial membrane potential and OXPHOS subunit levels and increased the mtROS level in HepG2 cells. Correspondingly, MitoQ pretreatment inhibited the upregulation of ACSL4 in CCl4-evoked mouse livers and HepG2 cells. MitoQ attenuated lipid peroxidation in vivo and in vitro after CCl4 exposure. Finally, MitoQ pretreatment alleviated CCl4-induced hepatocytic ferroptosis and ALI. These findings suggest that MitoQ protects against hepatocyte ferroptosis in CCl4-induced ALI via the mtROS-ACSL4 pathway.


Assuntos
Tetracloreto de Carbono , Doença Hepática Induzida por Substâncias e Drogas , Coenzima A Ligases , Ferroptose , Hepatócitos , Camundongos Endogâmicos C57BL , Compostos Organofosforados , Espécies Reativas de Oxigênio , Regulação para Cima , Animais , Hepatócitos/efeitos dos fármacos , Hepatócitos/metabolismo , Hepatócitos/patologia , Humanos , Regulação para Cima/efeitos dos fármacos , Células Hep G2 , Coenzima A Ligases/metabolismo , Coenzima A Ligases/genética , Camundongos , Doença Hepática Induzida por Substâncias e Drogas/prevenção & controle , Doença Hepática Induzida por Substâncias e Drogas/patologia , Doença Hepática Induzida por Substâncias e Drogas/metabolismo , Ferroptose/efeitos dos fármacos , Tetracloreto de Carbono/toxicidade , Espécies Reativas de Oxigênio/metabolismo , Masculino , Compostos Organofosforados/farmacologia , Ubiquinona/análogos & derivados , Ubiquinona/farmacologia , Antioxidantes/farmacologia , Peroxidação de Lipídeos/efeitos dos fármacos
7.
Macromol Rapid Commun ; 45(12): e2400059, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38538294

RESUMO

Many crucial components inside electronic devices are made from non-renewable, non-biodegradable, and potentially toxic materials, leading to environmental damage. Finding alternative green dielectric materials is mandatory to align with global sustainable goals. Carboxymethyl cellulose (CMC) is a bio-polymer derived from cellulose and has outstanding properties. Herein, citric acid, dextrin, and CMC based hydrogels are prepared, which are biocompatible and biodegradable and exhibit rubber-like mechanical properties, with Young modulus values of 0.89 MPa. Hence, thin film CMC-based hydrogel is explored as a suitable green high-k dielectric candidate for operation at low voltages, demonstrating a high dielectric constant of up to 78. These fabricated transistors reveal stable high capacitance (2090 nF cm-2) for ≈±3 V operation. Using a polyelectrolyte-type approach and poly-(2-vinyl anthracene) (PVAn) surface modification, this study demonstrates a thin dielectric layer (d ≈30 nm) with a small voltage threshold (Vth ≈-0.8 V), moderate transconductance (gm ≈65 nS), and high ON-OFF ratio (≈105). Furthermore, the dielectric layer exhibits stable performance under bias stress of ± 3.5 V and 100 cycles of switching tests. The modified CMC-based hydrogel demonstrates desirable performance as a green dielectric for low-voltage operation, further highlighting its biocompatibility.


Assuntos
Carboximetilcelulose Sódica , Dextrinas , Hidrogéis , Dextrinas/química , Carboximetilcelulose Sódica/química , Hidrogéis/química , Hidrogéis/síntese química , Materiais Biocompatíveis/química , Química Verde
8.
Health Sci Rep ; 7(2): e1820, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-38323124

RESUMO

Background and Aims: Influenza is one of the most widespread respiratory infections and poses a huge burden on health care worldwide. Vaccination is key to preventing and controlling influenza. Influenza vaccine hesitancy is an important reason for the low vaccination rate. In 2019, Vaccine hesitancy was identified as one of the top 10 threats to global health by the World Health Organization. However, there remains a glaring scarcity of bibliometric research in that regard. This study sought to identify research hotspots and future development trends on influenza vaccine hesitation and provide a new perspective and reference for future research. Methods: We retrieved publications on global influenza vaccine hesitancy from the Web of Science Core Collection database, Scopus, and PubMed databases from inception to 2022. This study used VOSviewer and CiteSpace for visualization analysis. Results: Influenza vaccine hesitancy-related publications increased rapidly from 2012 and peaked in 2022. One hundred and nine countries contributed to influenza vaccine hesitation research, and the United States ranked first with 541 articles and 7161 citations. Vaccines-Basel was the journal with the largest number of published studies on influenza vaccine hesitations. MacDonald was the most frequently cited author. The most popular research topics on influenza vaccine hesitancy were (1) determinants of influenza vaccination in specific populations, such as healthcare workers, children, pregnant women, and so on; (2) influenza and COVID-19 vaccine hesitancy during the COVID-19 pandemic. Conclusions: The trend in the number of annual publications related to influenza vaccine hesitancy indicating the COVID-19 pandemic will prompt researchers to increase their attention to influenza vaccine hesitancy. With healthcare workers as the key, reducing vaccine hesitancy and improving vaccine acceptance in high-risk groups will be the research direction in the next few years.

10.
Dev Comp Immunol ; 151: 105084, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37858612

RESUMO

Innate immunity is crucial for invertebrate defense against pathogenic infections. Numerous studies have indicated that the Toll-NF-κB pathway plays an important role in this process, particularly in anti-bacterial and anti-fungal immunity. Although the function of this pathway has been studied extensively, there are still uncertainties regarding its role in shrimp. In this study, we investigated the functions of Deformed Epidermal Autoregulatory Factor 1 (LvDEAF1) in Litopenaeus vannamei, a member of the Toll-NF-κB pathway. Our findings revealed that LvDEAF1 interacts with L. vannamei Pellino1 (LvPellino1). LvDEAF1 enhances the promoter activity of certain antimicrobial peptide genes, such as Metchnikowin and Drosomycin, in Drosophila Schneider 2 (S2) cells by binding to the NF-κB binding site. LvDEAF1 and LvPellino1 exhibit positive and synergistic effects. Additionally, the expression of LvDEAF1 is induced by Vibrio parahaemolyticus infection and lipopolysaccharides or zymosan treatment. Knockdown LvDEAF1 expression resulted in a decrease in Penaeidins 4 expression and an increase in the cumulative mortality of shrimp infected with V. parahaemolyticus. These findings indicate that LvDEAF1 plays an important role in the Toll-NF-κB pathway of L. vannamei and is essential for its immune response against pathogens.


Assuntos
Penaeidae , Vibrioses , Vibrio parahaemolyticus , Vírus da Síndrome da Mancha Branca 1 , Animais , NF-kappa B/metabolismo , Sequência de Aminoácidos , Proteínas de Artrópodes/metabolismo , Regiões Promotoras Genéticas/genética , Imunidade Inata/genética , Drosophila/genética
11.
Acta Pharmaceutica Sinica ; (12): 336-349, 2024.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-1016648

RESUMO

Small-molecule phenolic substances widely exist in animals and plants, and have some shared biological activities. The metabolism of phenylalanine and tyrosine in the human body, and especially the metabolism of catecholamine neurotransmitters, produces endogenous small-molecule phenols. Endogenous small-molecule phenolic substances are functionally related to the important physiological processes and the occurrence of mental diseases in humans and some animals, which are systematically sorts and summarized in this review. Integrating the previous experimental research and literature analysis on natural small-molecule phenols by our research group, the understanding of the hypothesis that "small-molecule phenol are pharmacological signal carriers" was deepened. Based on above, the concept of "phenolomics" was further proposed, analyzed the research direction and research content which can bring into the knowledge framework of phenolomics. The induction of phenolomics will provide wider perspectives on explaining the pharmacological mechanism of drugs, discovering new drug targets, and finding biomarkers of mental diseases.

12.
Artigo em Chinês | WPRIM (Pacífico Ocidental) | ID: wpr-1016396

RESUMO

Objective To analyze therapeutic effect of savolitinib in patients with stage Ⅲ/Ⅳ non-small cell lung cancer (NSCLC). Methods A total of 95 patients with MET 14 exon (METex14) jumping mutation in stage Ⅲ/Ⅳ NSCLC were divided into a control group (47 cases) and an observation group (48 cases) through a random-number table method. The patients in the control group were treated with crizotinib, whereas those in the observation group were treated with savolitinib. The clinical efficacy and incidence of toxic side effects in both groups were evaluated through a chi-square test, and survival was evaluated through Kaplan-Meier survival analysis. Results Compared with control group (31.91% and 70.21%), the objective response rate and disease control rate of the observation group were 52.08% and 87.50%, respectively (P<0.05). According to Kaplan-Meier survival analysis, the overall survival and progression free survival rates in the observation group were higher than those in the control group (Log rank χ2=8.003, 4.528; P=0.005, 0.033). No statistically significant difference in the degree of toxic side effects was found between the groups (P>0.05). Conclusion Savolitinib can improve the efficacy of treatment for stage Ⅲ/Ⅳ METex14 skip mutation NSCLC patients, prolong survival, enhance the tolerance of patients to savolitinib, and facilitate the management of adverse reactions.

13.
Int Immunopharmacol ; 125(Pt A): 111131, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-38149572

RESUMO

BACKGROUND: Previous study found that supplements with active vitamin D3 alleviated experimental colitis. The objective of this study was to investigate the possible role of 3-hydroxy-3-methylglutaryl-CoA synthase 2 (HMGCS2), a ketone synthase, on vitamin D3 protecting against experimental colitis. METHODS: HMGCS2 and vitamin D receptor (VDR) were measured in UC patients. The effects of vitamin D deficiency (VDD) and exogenous 1,25(OH)2D3 supplementation on experimental colitis were investigated in dextran sulfate sodium (DSS)-treated mice. DSS-induced oxidative stress and inflammation were analyzed in HT-29 cells. HMGCS2 was detected in 1,25(OH)2D3-pretreated HT-29 cells and mouse intestines. HMGCS2 was silenced to investigate the role of HMGCS2 in 1,25(OH)2D3 protecting against experimental colitis. RESULTS: Intestinal HMGCS2 downregulation was positively correlated with VDR reduction in UC patients. The in vivo experiments showed that VDD exacerbated DSS-induced colitis. By contrast, 1,25(OH)2D3 supplementation ameliorated DSS-induced colon damage, oxidative stress and inflammation. HMGCS2 was up-regulated after 1,25(OH)2D3 supplementation both in vivo and in vitro. Transfection with HMGCS2-siRNA inhibited antioxidant and anti-inflammatory effects of 1,25(OH)2D3 in DSS-treated HT-29 cells. CONCLUSION: 1,25(OH)2D3 supplementation up-regulates HMGCS2, which is responsible for 1,25(OH)2D3-mediated protection against oxidative stress and inflammation in DSS-induced colitis. These findings provide a potential therapeutic strategy for alleviating colitis-associated oxidative stress and inflammation.


Assuntos
Colite , Humanos , Camundongos , Animais , Colite/induzido quimicamente , Colite/tratamento farmacológico , Colite/prevenção & controle , Inflamação/tratamento farmacológico , Receptores de Calcitriol/genética , Receptores de Calcitriol/metabolismo , Colecalciferol/uso terapêutico , Estresse Oxidativo , Sulfato de Dextrana/farmacologia , Camundongos Endogâmicos C57BL , Hidroximetilglutaril-CoA Sintase
14.
Cell Biosci ; 13(1): 184, 2023 Oct 02.
Artigo em Inglês | MEDLINE | ID: mdl-37784089

RESUMO

BACKGROUND: CD24+CK19+/CD24+SOX9+ resident liver cells are activated and expanded after chronic liver injury in a ductular reaction. However, the sources and functions of these cells in liver damage remain disputed. RESULTS: The current study combined genetic lineage tracing with in vitro small-molecule-based reprogramming to define liver progenitor cells (LPCs) derived from hepatic parenchymal and non-parenchymal tissues. tdTom+ hepatocytes were isolated from ROSA26tdTomato mice following AAV8-Tbg-Cre-mediated recombination, EpCAM+ biliary epithelial cells (BECs) from wild-type intrahepatic bile ducts and ALB/GFP-EpCAM- cells were isolated from AlbCreERT/R26GFP mice. A cocktail of small molecules was used to convert the isolated cells into LPCs. These in vitro cultured LPCs with CD24 and SOX9 expression regained the ability to proliferate. Transcriptional profiling showed that the in-vitro cultured LPCs derived from the resident LPCs in non-parenchymal tissues expressed Lipocalin-2 (Lcn2) at high levels. Accordingly, endogenous Cd24a+Lcn2+ LPCs were identified by integration of sc-RNA-sequencing and pathological datasets of liver dysfunction which indicates that LPCs produced by ductular reactions might also originate from the resident LPCs. Transplantation of in-vitro cultured Cd24a+Lcn2+ LPCs into CCl4-induced fibrotic livers exacerbated liver damage and dysfunction, possibly due to LCN2-dependent macrophage inflammatory response. CONCLUSIONS: CD24+LCN2+ LPCs constituted the expanding ductular reaction and contributed to macrophage-mediated inflammation in chronic liver damage. The current findings highlight the roles of LPCs from distinct origins and expose the possibility of targeting LPCs in the treatment of chronic hepatic diseases.

15.
Phys Chem Chem Phys ; 25(48): 32763-32777, 2023 Dec 13.
Artigo em Inglês | MEDLINE | ID: mdl-37724061

RESUMO

Generating field-free (non-stationary) orientation of molecules in space has been a longstanding goal in the field of quantum control of molecular rotation, which has significant applications in physical chemistry, chemical physics, strong-field physics, and quantum information science. In this Perspective, we review and examine several representative control schemes developed in recent years and implemented in theoretical and experimental areas for generating field-free orientation of molecules. By conducting numerical simulations of different control schemes on the same molecular system, we demonstrate that quantum coherent control, specifically targeting a limited number of the lowest-lying rotational levels to achieve an optimal superposition, can result in a high degree of orientation. To this end, we provide an overview of our latest developed analytical method, which enables the precise design of terahertz field parameters through resonant excitation. This design approach facilitates the attainment of desired field-free orientations by optimizing the amplitudes and phases of rotational wave functions for the selected rotational levels. Finally, we outlook the significance of such progress in multiple frontier research fields, highlighting its potential applications in ultracold physics, quantum computation, quantum simulation, and quantum metrology.

16.
J Microbiol ; 61(8): 741-753, 2023 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-37665552

RESUMO

Accumulating studies have raised concerns about gut dysbiosis associating autism spectrum disorder (ASD) and its related symptoms. However, the effect of gut microbiota modification on the Chinese ASD population and its underlying mechanism were still elusive. Herein, we enrolled 24 ASD children to perform the first course of fresh washed microbiota transplantation (WMT), 18 patients decided to participate the second course, 13 of which stayed to participate the third course, and there were 8 patients at the fourth course. Then we evaluated the effects of fresh WMT on these patients and their related symptoms. Our results found that the sleeping disorder symptom was positively interrelated to ASD, fresh WMT significantly alleviated ASD and its sleeping disorder and constipation symptoms. In addition, WMT stably and continuously downregulated Bacteroides/Flavonifractor/Parasutterella while upregulated Prevotella_9 to decrease toxic metabolic production and improve detoxification by regulating glycolysis/myo-inositol/D-glucuronide/D-glucarate degradation, L-1,2-propanediol degradation, fatty acid ß-oxidation. Thus, our results suggested that fresh WMT moderated gut microbiome to improve the behavioral and sleeping disorder symptoms of ASD via decrease toxic metabolic production and improve detoxification. Which thus provides a promising gut ecological strategy for ASD children and its related symptoms treatments.

17.
Ying Yong Sheng Tai Xue Bao ; 34(6): 1500-1508, 2023 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-37694411

RESUMO

To investigate the response mechanisms of soil bacterial and fungal communities to the changes of preci-pitation in a desert steppe of Ningxia, we conducted a three-year precipitation control experiment following completely randomized design. There were five treatments, natural precipitation (T0), 50% less in precipitation (T1), 25% less in precipitation (T2), 25% more in precipitation (T3) and 50% more in precipitation (T4). By using Illumina high-throughput sequencing and bioinformatics analysis, we investigated the effects of increased and decreased precipitation on soil bacterial and fungal communities, and examined the correlations between soil physicochemical properties, plant communities and soil bacterial and fungal communities. The result showed that the richness of soil bacteria and fungi was highest in the T4 treatment. In addition, the relative abundance of Chloroflexi, the predominant phyla of soil bacteria was more sensitive to precipitation change. However, the relative abundance of only Ascomycota, a rare fungal taxon, responded to precipitation changes. Results of redundancy analysis showed that the first two axes accounted for 92.8% and 87.4% of the total variance for soil bacterial and fungal community composition, respectively. Precipitation and soil pH were the most important environmental factors driving changes in soil bacterial diversity and community composition. On the one hand, precipitation had a direct positive effect on bacterial diversity and community composition. On the other hand, precipitation changed pH by affecting soil moisture, which in turn had a significant indirect effect on bacterial diversity and community composition. Plant community biomass, plant species richness, and soil pH were the most influential environmental factors affecting fungal diversity and community composition. Precipitation had no direct effect on soil fungal community, but had a significant indirect effect by changing plant community richness and soil pH. The response mechanisms of bacterial and fungal communities in soil differed significantly under different precipitation regimes in the desert grasslands of Ningxia.


Assuntos
Micobioma , Bactérias , Biomassa , Sequenciamento de Nucleotídeos em Larga Escala , Solo
18.
Front Microbiol ; 14: 1210420, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37485531

RESUMO

Thermophilic xylanases from hot-spring microorganisms play potential biological and industrial applications for renewable and sustainable social development. However, high-temperature adaptation mechanisms of these thermophilic xylanases remain elusive at the molecular and evolutionary levels. Here, two recently reported xylanases, named XynDRTY1 and XynM1, from hot springs were subjected to molecular dynamics (MD) simulations at a series of temperature gradients and comparatively analyzed in comparison with the evolutionary background of the xylanase family. Comparative analysis of MD trajectories revealed that the XynM1 exhibits smaller structural dynamics and greater thermal stability than the XynDRTY1, although both share a similar fold architecture with structural differences in the ßα_loops. Local regions whose conformational flexibility and regular secondary structure exhibited differences as temperature increases were closely related to the high-temperature adaptation of xylanase, implying that stabilization of these regions is a feasible strategy to improve the thermal stability of xylanases. Furthermore, coevolutionary information from the xylanase family further specified the structural basis of xylanases. Thanks to these results about the sequence, structure, and dynamics of thermophilic xylanases from hot springs, a series of high-temperature-related structural determinants were resolved to promote understanding of the molecular mechanism of xylanase high-temperature adaptation and to provide direct assistance in the improvement of xylanase thermal stability.

19.
Thorac Cardiovasc Surg ; 71(8): 671-679, 2023 12.
Artigo em Inglês | MEDLINE | ID: mdl-37186190

RESUMO

BACKGROUND: Patients undergoing lung tumor surgery may experience various complications after discharge from the hospital. Using patient-reported outcomes (PROs), this study attempted to identify relevant indicators of postdischarge complications after lung tumor surgery and develop a predictive nomogram model to evaluate the risk for individual patients. METHODS: Patients who underwent lung tumor surgery between December 2021 and June 2022 were included in this study. PROs were assessed using the Perioperative Symptom Assessment for Lung Surgery scale and were assessed preoperatively at baseline, on postoperative day 1 (POD1) 1 to POD4, and then weekly until the fourth week. A random forest machine learning prediction model was built to rank the importance of each PRO score of patients on POD1 to POD4. We then selected the top 10 variables in terms of importance for the multivariable logistic regression analysis. Finally, a nomogram was developed. RESULTS: PROs, including coughing (POD3 and POD4), daily activity (POD1), and pain (POD1 and POD2), were associated with postdischarge complications in patients undergoing lung tumor surgery. The predictive model showed good performance in estimating the risk of postdischarge complications, with an area under the curve of 0.833 (95% confidence interval: 0.753-0.912), while maintaining good calibration and clinical value. CONCLUSION: We found that PRO scores on POD1 to POD4 were associated with postdischarge complications after lung tumor surgery, and we developed a helpful nomogram model to predict the risk of postdischarge complications.


Assuntos
Neoplasias Pulmonares , Alta do Paciente , Humanos , Assistência ao Convalescente , Resultado do Tratamento , Neoplasias Pulmonares/cirurgia , Neoplasias Pulmonares/complicações , Pulmão , Complicações Pós-Operatórias/diagnóstico , Complicações Pós-Operatórias/etiologia
20.
Dig Dis ; 41(4): 632-640, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37019089

RESUMO

INTRODUCTION: Anemia is a common manifestation of chronic liver diseases. It is a predictor of severe disease, a high risk of complications, and poor outcomes in various liver diseases. However, it remains unclear whether anemia serves as a similar indicator in patients with Wilson disease (WD). Therefore, this study aimed to investigate the relationship between anemia and severity, hepatic complications, and the progression of WD. METHODS: Medical data were collected retrospectively from January 1, 2016, to December 31, 2020. Univariate and multivariate analyses were carried out to investigate the relationship between anemia and liver-associated disease severity, hepatic complications, and the progression of WD. RESULTS: A total of 288 WD patients (48 with and 240 without anemia) were enrolled in the study. Multivariate linear regression revealed that WD patients with anemia had significantly higher levels of bilirubin, alanine transaminase, prothrombin time, international normalized ratio, type Ⅳ collagen, and hyaluronic acid and significantly lower levels of albumin, total cholesterol, and high-density lipoprotein-cholesterol (all p < 0.05). Multivariate logistic regression showed that anemia was a risk factor for gastric varices and ascites (all p < 0.05). Fully adjusted Cox regression revealed that anemia was an independent risk factor for advanced Child-Pugh classification (p = 0.034). CONCLUSIONS: Anemia was common in WD patients and was associated with greater disease severity, a higher risk of hepatic complications, and a faster progression.


Assuntos
Anemia , Degeneração Hepatolenticular , Humanos , Degeneração Hepatolenticular/complicações , Estudos Retrospectivos , Cirrose Hepática/complicações , Gravidade do Paciente , Anemia/complicações , Colesterol
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