Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 490
Filtrar
1.
J Pediatr Surg ; : 161930, 2024 Sep 14.
Artigo em Inglês | MEDLINE | ID: mdl-39370379

RESUMO

PURPOSE: The aim of our study was to analyze the medium-to long-term outcomes of Rex shunts in a large series of children with extrahepatic portal vein obstruction (EHPVO). METHODS: The clinical data of 105 children aged between 6 months and 16 years with EHPVO who underwent Rex shunt between October 2014 and June 2021 at our center were retrospectively reviewed after more than 2 years of follow-up. RESULTS: The overall patency rate of the Rex shunt was 91.43% (96/105) during a median follow-up of 41 months (range, 24-98 months). Eighty-seven (82.86%) of the 105 patients underwent classical Rex shunt with internal jugular vein (IJV) bypass, and the remaining 18 patients (17.14%) underwent modified Rex shunt with intra-abdominal vein bypass. Patients with a patent shunt experienced portal hypertension resolution, which was characterized by a reduction in portal pressure, disappearance of variceal bleeding, relief of gastroesophageal varices, and relief of splenomegaly or hypersplenism. The rate of Rex shunt thrombosis in our center was 8.57% (9/105), and a repeat Rex shunt was effective for the treatment of graft thrombosis. Anastomotic stenosis occurred in 14.26% (15/105) of the children, 38.46% (5/13) of whom received successful endovascular intervention therapy and experienced remission of portal hypertension symptoms. The patency rate of the classical Rex shunt was higher than that of the modified Rex shunt (97.70% vs. 61.11%), whereas the rate of vascular complications, including anastomotic stenosis and graft thrombosis, of the classical Rex shunt was lower than that of the modified Rex shunt (11.49% vs. 77.78%). Further comparison revealed that the risk of vascular complications was substantially greater in the modified Rex shunt group than in the classical Rex shunt group in the nonadjusted model, minimally adjusted model, and fully adjusted model (RR ranged from 6.77 to 7.07, all p < 0.001). CONCLUSIONS: The Rex shunt provides medium-to long-term benefits for children with EHPVO. The classical Rex shunt with IJV bypass provides the best patency rate and the fewest vascular complications. LEVELS OF EVIDENCE: Ⅲ TYPE OF STUDY: Retrospective comparative study.

2.
Front Psychiatry ; 15: 1416420, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39376971

RESUMO

Objectives: The purpose of this systematic review of randomized controlled trials (RCTs) was to evaluate the effectiveness, safety, and tolerability of psilocybin in adult patients with major depressive disorder (MDD). Methods: A systematic search (up to September 14, 2023) was conducted for RCTs that examined the efficacy, safety, and tolerability of psilocybin in physically healthy adult patients with MDD. Three independent researchers extracted data from publications where the primary outcome was a change in depressive symptoms, and key secondary outcomes were changes in anxiety symptoms and suicidal ideation, discontinuation rates for any reason, and adverse drug reactions (ADRs). Results: Five RCTs with 472 adult patients with MDD on psilocybin (n = 274) and controls (n = 198) were included. Two of the five RCTs (40%) reported mixed results, while the other three (60%) found that psilocybin had a beneficial effect on MDD treatment. Four RCTs (80%) assessing the anxiolytic effects of psilocybin for treating MDD found that psilocybin was significantly more effective than the control group in improving anxiety symptoms. Psilocybin was more effective than the control group in improving suicidal ideation in one out of five RCTs. Discontinuation rates were similar for any reason between the psilocybin group (2-13%) and the control group (4-21%) (P > 0.05). Four RCTs (80%) reported ADRs in detail. The most common ADR in both groups was headache. Conclusion: Psilocybin was effective in improving depressive symptoms in over half of the included studies and reduced anxiety symptoms in patients with MDD. The long-term efficacy and safety of psilocybin for MDD treatment needs to be further investigated in large RCTs.

3.
Int J Ophthalmol ; 17(9): 1689-1695, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39296562

RESUMO

AIM: To report the clinical profile, endoscopic dacryocystorhinostomy (En-DCR) management, and acute dacryocystitis (AD) outcomes in China. METHODS: Clinical data of 554 adult AD patients (554 eyes) who presented in 7 tertiary eye care centers for 10y from Jan 2010 to Mar 2020 were retrospectively analyzed. Clinical profile, En-DCR management, and outcomes of all cases were recorded. The anatomical and functional success were evaluated for 12mo post-operation. RESULTS: The analysis included 149 males and 368 females with a median age of 55.2y (range: 18-84y). There were 459 eyes with a history of epiphora or purulent secretion. The time between a symptom of lacrimal duct obstruction and acute onset was 1 to 540 (66.1±58.2)mo. Fifty-nine eyes had a history of the previous acute attack. Seventy-four eyes developed a cutaneous fistula, while 11 eyes had post septal cellulitis pre-operation. En-DCR with an anatomical success of 91.7% and functional success of 90.1%. The success rate of the patients with a history of acute episodes and the preoperative fistula was lower than the overall success rates. CONCLUSION: En-DCR can be performed during an acute episode in AD with a success rate of over 90%.

4.
J Neurophysiol ; 2024 Sep 11.
Artigo em Inglês | MEDLINE | ID: mdl-39258777

RESUMO

The central auditory system encompasses two primary functions: identification and localization. Spatial release from masking (SRM) highlights speech recognition in competing noise and improves the listening experience when a spatial cue is introduced between noise and target speech. This assessment focuses on the integrity of auditory function and holds clinical significance. However, infants or pre-lingual subjects sometimes provide less reliable results. This study investigates the value of cortical auditory evoked potentials (CAEPs) onset and acoustic change complex (ACC) as an objective measurement of SRM. Thirty normal-hearing young adults (11 males) were recruited. We found the spatial separation of signals and noise (±90 degrees symmetrically) resulted in a signal-to-noise ratio (SNR) improvement of 9.00 ± 1.71 dB behaviorally. It significantly enhanced cortical processing at all SNR levels, shortened CAEPs latencies, and increased amplitudes, resulting in a greater number of measurable peaks for ACC. SRM showed mild to moderate correlations with the differences between the two conditions in CAEP measures. The regression model combining N1'-P2' amplitude at 5 dB SNR (R2 = 0.26), P1 amplitude at 0 dB SNR (R2 = 0.14), and P1 latency at -5 dB SNR (R2 = 0.15), explained 45.3% of the variance in SRM. Our study demonstrates that introducing spatial cues can improve speech perception and enhance central auditory processing in normal-hearing young adults. CAEPs may contribute to predictions about SRM and hold potential for practical application.

5.
J Affect Disord ; 368: 320-328, 2024 Sep 10.
Artigo em Inglês | MEDLINE | ID: mdl-39265871

RESUMO

BACKGROUND: Electroconvulsive therapy (ECT) is a commonly used alternative for treatment-resistant depression (TRD). Although esketamine has a rapid pharmacological antidepressant action, it has not been studied as an ECT anesthetic. The objective of this study was to compare the efficacy and safety of esketamine with propofol when both are used as ECT anesthetic agents. METHODS: Forty patients with TRD were assigned to one of two arms in a double-blind, randomized controlled trial: esketamine or propofol anesthesia for a series of eight ECT sessions. Using a non-inferiority design, the primary outcome was the reduction in HAMD-17 depressive symptoms. The other outcomes were: rates of response and remission, anxiety, suicidal ideation, cognitive function, and adverse events. These were compared in an intention-to-treat analysis. RESULTS: Esketamine-ECT was non-inferior to propofol-ECT for reducing TRD symptoms after 8 sessions (adjusted Δ = 2.0, 95 % CI: -1.2-5.1). Compared to propofol-ECT, esketamine-ECT also had higher depression response (80 % vs. 70 %; p = .06) and remission (65 % vs. 55 %; p = .11) rates but non-inferiority was not established. In four components of cognitive function (speed of processing, working memory, visual learning, and verbal learning) esketamine-ECT was non-inferior to propofol-ECT. The results for anxiety, suicidal ideation, and adverse events (all p's > .05) were inconclusive. CONCLUSION: Esketamine was non-inferior to propofol when both are used as anesthetics for TRD patients undergoing ECT. Replication studies with larger samples are needed to examine the inconclusive results. REGISTRATION NUMBER: ChiCTR2000033715.

6.
Sci Rep ; 14(1): 20542, 2024 Sep 04.
Artigo em Inglês | MEDLINE | ID: mdl-39232118

RESUMO

In this study, we calculate the Higgs mass matrix and explore the limitations of the minimum conditions of the scalar potential on parameter degrees of freedom in the CP violation TNMSSM. We discuss the contributions of some parameters to Higgs mass, and their impact on the strength of Higgs decay signals in different decay channels h → γ γ , h → VV ( V = W , Z ) and h → f f ¯ ( f = b , c , τ ) .

7.
Angew Chem Int Ed Engl ; : e202412553, 2024 Aug 12.
Artigo em Inglês | MEDLINE | ID: mdl-39133133

RESUMO

Efficient photocatalytic CO2 reduction coupled with the photosynthesis of pure H2O2 is a challenging and significant task. Herein, using classical CO2 photoreduction site iron porphyrinate as the linker, Ag(I) clusters were spatially separated and evenly distributed within a new metal-organic framework (MOF), namely Ag27TPyP-Fe. With water as electron donors, Ag27TPyP-Fe exhibited remarkable performances in artificial photosynthetic overall reaction with CO yield of 36.5 µmol g-1 h-1 and ca. 100% selectivity, as well as H2O2 evolution rate of 35.9 µmol g-1 h-1. Since H2O2 in the liquid phase can be more readily separated from the gaseous products of CO2 photoreduction, high-purity H2O2 with a concentration up to 0.1 mM was obtained. Confirmed by theoretical calculations and the established energy level diagram, the reductive iron(II) porphyrinates and oxidative Ag(I) clusters within an integrated framework functioned synergistically to achieve artificial photosynthesis. Furthermore, photoluminescence spectroscopy and photoelectrochemical measurements revealed that the robust connection of Ag(I) clusters and iron porphyrinate ligands facilitated efficient charge separation and rapid electron transfer, thereby enhancing the photocatalytic activity.

8.
Int J Cardiol ; 414: 132384, 2024 Nov 01.
Artigo em Inglês | MEDLINE | ID: mdl-39032578

RESUMO

BACKGROUND: Chronic total occlusions (CTO) occur in about 20% of patients referred for coronary angiography, and right coronary artery (RCA) CTO has been reported in 38-50% of the entire CTO population. Limited data on angiographic and procedural characteristics of RCA-CTO and the risk of adverse cardiac events asks for a detailed study. METHODS: From 2010 to 2013, patients with attempted revascularization of at least one CTO lesion were included and followed up to 5 years after PCI. Eligible patients are assigned to RCA-CTO and non-RCA-CTO groups based on their target vessels. The primary endpoint was major adverse cardiovascular events (MACEs; a composite of all-cause death, myocardial infarction (MI) or rehospitalization for heart failure), and secondary endpoints were cardiac death, target lesion revascularization (TLR) and target vessel revascularization (TVR). RESULTS: The present study included 2659 eligible patients, among which 1285 patients were assigned to the RCA-CTO group, whereas 1374 patients were assigned to the non-RCA-CTO group. Lesions in RCA had longer lesion length, higher J-CTO score, higher rates of severe vessel tortuosity, a higher percentage of Rentrop grade 2-3, and more likely to be re-try lesion than those in LAD or LCX (all P < 0.01). CTO lesions in RCA reached less successful recanalization and post-procedural TIMI 3 flow (all <0.01). Multivariate Cox analysis revealed that RCA-CTO was not associated with primary outcome MACEs. Besides MACEs, RCA-CTO was also not associated with cardiac death, but was significantly associated with TLR and TVR (adjusted HR: 1.37 [95% CI:1.07-1.76], P = 0.01; adjusted HR: 1.43 [95% CI:1.13-1.82], P = 0.003). CONCLUSION: RCA-CTO lesions, which had more complex angiographic features, independently contributed to TLR and TVR but not to MACEs or cardiac death in the 5 years of follow-up.


Assuntos
Oclusão Coronária , Intervenção Coronária Percutânea , Humanos , Masculino , Oclusão Coronária/cirurgia , Oclusão Coronária/diagnóstico por imagem , Oclusão Coronária/diagnóstico , Feminino , Estudos Retrospectivos , Intervenção Coronária Percutânea/métodos , Intervenção Coronária Percutânea/tendências , Pessoa de Meia-Idade , Idoso , Doença Crônica , Seguimentos , Prognóstico , Angiografia Coronária , Vasos Coronários/diagnóstico por imagem , Vasos Coronários/cirurgia , Resultado do Tratamento , Fatores de Tempo
9.
Genome Biol Evol ; 16(7)2024 Jul 03.
Artigo em Inglês | MEDLINE | ID: mdl-38946297

RESUMO

Schoenoplectus tabernaemontani (C. C. Gmelin) Palla is a typical macrophyte in diverse wetland ecosystems. This species holds great potential in decontamination applications and carbon sequestration. Previous studies have shown that this species may have experienced recent polyploidization. This would make S. tabernaemontani a unique model to study the processes and consequences of whole-genome duplications in the context of the well-documented holocentric chromosomes and dysploidy events in Cyperaceae. However, the inference was not completely solid because it lacked homology information that is essential to ascertain polyploidy. We present here the first chromosome-level genome assembly for S. tabernaemontani. By combining Oxford Nanopore Technologies (ONT) long reads and Illumina short reads, plus chromatin conformation via the Hi-C method, we assembled a genome spanning 507.96 Mb, with 99.43% of Hi-C data accurately mapped to the assembly. The assembly contig N50 value was 3.62 Mb. The overall BUSCO score was 94.40%. About 68.94% of the genome was comprised of repetitive elements. A total of 36,994 protein-coding genes were predicted and annotated. Long terminal repeat retrotransposons accounted for ∼26.99% of the genome, surpassing the content observed in most sequenced Cyperid genomes. Our well-supported haploid assembly comprised 21 pseudochromosomes, each harboring putative holocentric centromeres. Our findings corroborated a karyotype of 2n = 2X = 42. We also confirmed a recent whole-genome duplication occurring after the divergence between Schoenoplecteae and Bolboschoeneae. Our genome assembly expands the scope of sequenced genomes within the Cyperaceae family, encompassing the fifth genus. It also provides research resources on Cyperid evolution and wetland conservation.


Assuntos
Cromossomos de Plantas , Cyperaceae , Genoma de Planta , Cyperaceae/genética , Cromossomos de Plantas/genética , Duplicação Gênica , Poliploidia , Evolução Molecular
10.
World J Clin Cases ; 12(21): 4642-4651, 2024 Jul 26.
Artigo em Inglês | MEDLINE | ID: mdl-39070806

RESUMO

BACKGROUND: Studies have revealed that Children's psychological, behavioral, and emotional problems are easily influenced by the family environment. In recent years, the family structure in China has undergone significant changes, with more families having two or three children. AIM: To explore the relationship between emotional behavior and parental job stress in only preschool and non-only preschool children. METHODS: Children aged 3-6 in kindergartens in four main urban areas of Shijiazhuang were selected by stratified sampling for a questionnaire and divided into only and non-only child groups. Their emotional behaviors and parental pressure were compared. Only and non-only children were paired in a 1:1 ratio by class and age (difference less than or equal to 6 months), and the matched data were compared. The relationship between children's emotional behavior and parents' job stress before and after matching was analyzed. RESULTS: Before matching, the mother's occupation, children's personality characteristics, and children's rearing patterns differed between the groups (P < 0.05). After matching 550 pairs, differences in the children's parenting styles remained. There were significant differences in children's gender and parents' attitudes toward children between the two groups. The Strengths and Difficulties Questionnaire (SDQ) scores of children in the only child group and the Parenting Stress Index-Short Form (PSI-SF) scores of parents were significantly lower than those in the non-only child group (P < 0.05). Pearson's correlation analysis showed that after matching, there was a positive correlation between children's parenting style and parents' attitudes toward their children (r = 0.096, P < 0.01), and the PSI-SF score was positively correlated with children's gender, parents' attitudes toward their children, and SDQ scores (r = 0.077, 0.193, 0.172, 0.222). CONCLUSION: Preschool children's emotional behavior and parental pressure were significantly higher in multi-child families. Parental pressure in differently structured families was associated with many factors, and preschool children's emotional behavior was positively correlated with parental pressure.

11.
Sci Rep ; 14(1): 16564, 2024 07 17.
Artigo em Inglês | MEDLINE | ID: mdl-39019887

RESUMO

Bitter gourd is an economically important horticultural crop for its edible and medicinal value. However, the regulatory mechanisms of bitter gourd in response to cold stress are still poorly elucidated. In this study, phytohormone determination and comparative transcriptome analyses in XY (cold-tolerant) and QF (cold-sensitive) after low temperature treatment were conducted. Under cold stress, the endogenous contents of abscisic acid (ABA), jasmonic acid (JA) and salicylic acid (SA) in XY were significantly increased at 24 h after treatment (HAT), indicating that ABA, JA and SA might function in regulating cold resistance. RNA-seq results revealed that more differentially expressed genes were identified at 6 HAT in QF and 24 HAT in XY, respectively. KEGG analysis suggested that the plant hormone signal transduction pathway was significantly enriched in both genotypes at all the time points. In addition, transcription factors showing different expression patterns between XY and QF were identified, including CBF3, ERF2, NAC90, WRKY51 and WRKY70. Weighted gene co-expression network analysis suggested MARK1, ERF17, UGT74E2, GH3.1 and PPR as hub genes. These results will deepen the understanding of molecular mechanism of bitter gourd in response to cold stress and the identified genes may help to facilitate the genetic improvement of cold-resistant cultivars.


Assuntos
Resposta ao Choque Frio , Perfilação da Expressão Gênica , Regulação da Expressão Gênica de Plantas , Genótipo , Momordica charantia , Reguladores de Crescimento de Plantas , Momordica charantia/genética , Momordica charantia/metabolismo , Resposta ao Choque Frio/genética , Perfilação da Expressão Gênica/métodos , Reguladores de Crescimento de Plantas/metabolismo , Transcriptoma , Oxilipinas/metabolismo , Proteínas de Plantas/genética , Proteínas de Plantas/metabolismo , Ácido Salicílico/metabolismo , Ácido Abscísico/metabolismo , Fatores de Transcrição/genética , Fatores de Transcrição/metabolismo , Ciclopentanos/metabolismo
12.
Angew Chem Int Ed Engl ; 63(34): e202317648, 2024 Aug 19.
Artigo em Inglês | MEDLINE | ID: mdl-38837493

RESUMO

Molecular sieving is an ideal separation mechanism, but controlling pore size, restricting framework flexibility, and avoiding strong adsorption are all very challenging. Here, we report a flexible adsorbent showing molecular sieving at ambient temperature and high pressure, even under high humidity. While typical guest-induced transformations are observed, a high transition pressure of 16.6 atm is observed for C2H4 at 298 K because of very weak C2H4 adsorption (~16 kJ mol-1). Also, C2H6 is completely excluded below the pore-opening pressure of 7.7 atm, giving single-component selectivity of ca. 300. Quantitative high-pressure column breakthrough experiments using 1 : 1 C2H4/C2H6 mixtures at 10 atm as input confirm molecular sieving with C2H4 adsorption of 0.73 mmol g-1 or 32 cm3(STP) cm-3 and negligible C2H6 adsorption of 0.001(2) mmol g-1, and the adsorbent can be completely regenerated by inert gas purging. Furthermore, it is highly hydrophobic with negligible water adsorption, and the C2H4/C2H6 separation performance is unaffected at high humidity.

13.
Opt Express ; 32(11): 20035-20049, 2024 May 20.
Artigo em Inglês | MEDLINE | ID: mdl-38859122

RESUMO

Bidirectional output oscillating-amplifying integrated fiber laser (B-OAIFL) can achieve the two-ports laser amplification based on a single cavity, showcasing a promising prospect. In order to improve both the laser power and beam quality, we first simulate and optimize the stimulated Raman scattering (SRS) effect in the B-OAIFL. The simulation results show the SRS effect can be suppressed by optimizing the diameter as well as the length of the active fiber at different locations. With the guidance of theoretical and experimental analysis for the combined suppression of SRS and transverse mode instability (TMI), a near-single-mode B-OAIFL with 2 × 4 kW was demonstrated. Based on this foundation, we further devoted ourselves to the pursuit of the optimization of the structure and performance. The necessity of the configuration of side pump, which was initially introduced for its exceptional performance in stabilizing temporal chaos, was reevaluated in detail. With its negative impacts on efficiency improvement and SRS suppression were analyzed and verified, we removed this configuration and finally demonstrated a more simplified design with superior performance. A total bidirectional output of 8105 W was achieved, with an O-O efficiency of 79.6% and a near-single-mode beam quality of M A 2∼1.36,M B 2∼1.63. No signs of TMI were observed, and the signal-to-SRS suppression ratio was over 38 dB. The results still demonstrate a promising potential for power scaling based on this configuration and parameters.

14.
Front Microbiol ; 15: 1417049, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38912350

RESUMO

Introduction: The accurate distinction between periprosthetic joint infections (PJI) and aseptic failures (AF) is of paramount importance due to differences in treatment. However, this could be challenging by using the current criteria. Various synovial fluid biomarkers are being assessed to improve the diagnostic accuracy. Myeloperoxidase (MPO), an enzyme contained in the granules of neutrophils, may be a promising biomarker for PJI. Methods: Synovial fluids of 99 patients (n = 65 PJI according to EBJIS criteria; n = 34 AF) were collected in two specialized orthopedic centers. PJI were divided into acute (n = 33) and low-grade (n = 32) according to previously published classification. An activity assay specific for active MPO was performed in each sample. Ability of MPO to correctly discriminate patients with PJI from AF was determined by ROC analysis. The best discriminating cut-off value was determined by calculating the J Youden index. For all analyses, a P value < 0.05 was considered statistically significant. Results: Active MPO was higher in PJI than AF (P < 0.0001). The ROC analysis revealed a significant area under the curve (AUC: 0.86; 95% CI: 0.78-0.93, P < 0.0001). A cut-off value of 561.9 U/mL, with good sensitivity (0.69) and specificity (0.88), discriminated between AF and PJI (accuracy 75.76%, 95% CI: 66.11-83.81%, positive likelihood ratio 5.88, 95% CI: 2.31-14.98 and negative likelihood ratio 0.35, 95%CI: 0.24-0.51). No difference in MPO levels was found between acute and chronic low-grade PJI. Conclusion: The proposed assay appears to be a reliable and affordable tool for detecting the active MPO in synovial fluid, with promising characteristics of sensitivity and specificity in discriminating both acute and low-grade PJI from AF. Further studies are needed to confirm MPO diagnostic cut-off values and validate their use in the routine clinical practice.

15.
Materials (Basel) ; 17(11)2024 Jun 04.
Artigo em Inglês | MEDLINE | ID: mdl-38893995

RESUMO

Calcareous mudstone, a type of red-bed soft rock, is prevalent in the surrounding rock of the Central Yunnan Water Diversion Project (CYWDP) in Yunnan Province, China, significantly impacting both construction and operation. The mechanical properties of calcareous mudstone vary with depth. This study investigates its mechanical properties, permeability characteristics, energy evolution, and macro- and micro-failure characteristics during deformation using triaxial compression tests under different confining pressures. Results reveal distinct stage characteristics in the stress-strain behavior, permeability, and energy evolution of calcareous mudstone. Crack propagation, permeability evolution, and energy dissipation are closely linked, elucidating the deformation and failure process, with fluid pressure playing a crucial role. The confining pressure σ3 increased from 2 MPa to 4 MPa and 6 MPa, while the peak stress σc (Pw = 1 MPa) of the calcareous mudstone increased by 84.49% and 24.89%, respectively. Conversely, the permeability at σc decreased from 11.25 × 10-17 m2 to 8.99 × 10-17 m2 and 5.72 × 10-17 m2, while the dissipative energy at σc increased from 12.39 kJ/m3 to 21.14 kJ/m3 and 42.51 kJ/m3. In comparison to those without fluid pressure (Pw = 0), the value of σc at Pw = 1 MPa was reduced by 36.61%, 23.23%, and 20.67% when σ3 was 2, 4, and 6 MPa, respectively. Increasing confining pressure augments characteristic stresses, deformation and failure energy, and ductility, while reducing permeability, crack propagation, and width. These findings enhance our understanding of calcareous mudstone properties at varying depths in tunnel construction scenarios.

16.
Phytochemistry ; 224: 114150, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-38763312

RESUMO

In our search for neuroprotective agents, six previously undescribed highly oxidized guaiane sesquiterpenes, linderaggrols A-F (1-6), together with three known sesquiterpenes, were isolated from the roots of Lindera aggregata (Sims) Kosterm. Their structures including absolute configurations were established by a combination of NMR spectroscopic techniques and single crystal X-ray diffraction experiments. Compounds 1-6 represented the first instances of guaiane 12(8),15(6)-dilactones. Additionally, compound 6 possessed a rare 1,8-O-bridge. Neuroprotective effects against erastin-induced ferroptosis on HT-22 cells showed that some compounds demonstrated neuroprotective effects at 20.0 µM.


Assuntos
Lindera , Fármacos Neuroprotetores , Raízes de Plantas , Fármacos Neuroprotetores/farmacologia , Fármacos Neuroprotetores/química , Fármacos Neuroprotetores/isolamento & purificação , Raízes de Plantas/química , Lindera/química , Estrutura Molecular , Oxirredução , Sesquiterpenos de Guaiano/química , Sesquiterpenos de Guaiano/farmacologia , Sesquiterpenos de Guaiano/isolamento & purificação , Camundongos , Lactonas/farmacologia , Lactonas/química , Lactonas/isolamento & purificação , Animais , Sobrevivência Celular/efeitos dos fármacos , Linhagem Celular , Relação Estrutura-Atividade , Relação Dose-Resposta a Droga , Modelos Moleculares
17.
Bioorg Chem ; 148: 107427, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38728911

RESUMO

Histone acetyltransferase CREB-binding protein (CBP) and its homologous protein p300 are key transcriptional activators that can activate oncogene transcription, which present promising targets for cancer therapy. Here, we designed and synthesized a series of p300/CBP targeted low molecular weight PROTACs by assembling the covalent ligand of RNF126 E3 ubiquitin ligase and the bromodomain ligand of the p300/CBP. The optimal molecule A8 could effectively degrade p300 and CBP through the ubiquitin-proteasome system in time- and concentration-dependent manners, with half-maximal degradation (DC50) concentrations of 208.35/454.35 nM and 82.24/79.45 nM for p300/CBP in MV4-11 and Molm13 cell lines after 72 h of treatment. And the degradation of p300/CBP by A8 is dependent on the ubiquitin-proteasome pathway and its simultaneous interactions with the target proteins and RNF126. A8 exhibits good antiproliferative activity in a series of p300/CBP-dependent cancer cells. It could transcriptionally inhibit the expression of c-Myc, induce cell cycle arrest in the G0/G1 phase and apoptosis in MV4-11 cells. This study thus provided us a new chemotype for the development of drug-like PROTACs targeting p300/CBP, which is expected to be applied in cancer therapy.


Assuntos
Antineoplásicos , Proliferação de Células , Relação Dose-Resposta a Droga , Desenho de Fármacos , Ensaios de Seleção de Medicamentos Antitumorais , Ubiquitina-Proteína Ligases , Fatores de Transcrição de p300-CBP , Humanos , Ubiquitina-Proteína Ligases/metabolismo , Ubiquitina-Proteína Ligases/antagonistas & inibidores , Fatores de Transcrição de p300-CBP/metabolismo , Fatores de Transcrição de p300-CBP/antagonistas & inibidores , Antineoplásicos/farmacologia , Antineoplásicos/síntese química , Antineoplásicos/química , Proliferação de Células/efeitos dos fármacos , Relação Estrutura-Atividade , Estrutura Molecular , Apoptose/efeitos dos fármacos , Linhagem Celular Tumoral
18.
Sports Med Health Sci ; 6(2): 200-203, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38708321

RESUMO

Exercise prescriptions play a vital role in the prevention and treatment of chronic diseases. A consensus regarding exercise prescription is important for physical health. The "Consensus statement of Chinese experts on exercise prescription" (hereinafter referred to as "Expert Consensus") divides exercise prescription into two categories: fitness exercise prescription and medical exercise prescription. Traditional Chinese fitness exercises, exercise risk, exercise prescription, and basic precautions for exercise prescription are explained.

19.
Alpha Psychiatry ; 25(2): 282-289, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38798804

RESUMO

Transnasal humidified rapid-insufflation ventilatory exchange (THRIVE) is a safe, effective, and novel technique that is currently being used in electroconvulsive therapy (ECT). This study aimed to summarize the clinical practices of THRIVE use in ECT to aid physicians and institutions in implementing the best practice guidelines for ECT. Thus, we reviewed the current literature and presented our consensus on the application of THRIVE in ECT in daily clinical practice. This consensus provides information regarding THRIVE use in ECT, including its safety, effectiveness, procedures, precautions, special case management, and application in special populations. Moreover, it guides the standardized use of THRIVE in ECT.

20.
Animals (Basel) ; 14(9)2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38731276

RESUMO

The average life of a dog is generally maintained at ten to fifteen years, and tumours are the predominant reason that leads to the death of dogs, especially canine mammary carcinoma. Therefore, early diagnosis of tumours is very important. In this study, tumor size, morphology, and texture could be seen through general clinical examination, tumor metastasis could be seen through imaging examination, inflammatory reactions could be seen through hematological examination, and abnormal cell morphology could be seen through cytological and histopathological examination. In the 269 malignant cases and 179 benign cases, we randomly selected 30 cases each, and an additional 30 healthy dogs were selected for the experiment (healthy dogs: dogs in good physical condition without any tumor or other diseases). We used RT-qPCR and ELISA to determine the relative expression of vascular endothelial growth factor (VEGF), tumor protein P53 (P53), serum ferritin (SF), and NOD-like receptor protein 3 (NLRP3) in 30 healthy dogs, 30 dogs with benign mammary tumours, and 30 dogs with malignant mammary tumours. In the results, the same expression trend was obtained both in serum and tissues, and the expression of the four markers was the highest in malignant mammary tumours, with highly significant differences compared with the benign and healthy/paracancerous groups. By plotting the ROC curves, it was found that the results of combined tests were better than a single test and the combination of the four markers was the best for the early diagnosis. In conclusion, this can assist the clinical early diagnosis to a certain extent, and also provides some references and assistance for the development of tumor detection kits in clinical practice.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA