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1.
Small ; 19(30): e2300217, 2023 07.
Artículo en Inglés | MEDLINE | ID: mdl-37021733

RESUMEN

Hepatic ischemia-reperfusion injury (HIRI) is a critical complication after liver surgery that negatively affects surgical outcomes of patients with the end-stage liver-related disease. Reactive oxygen species (ROS) are responsible for the development of ischemia-reperfusion injury and eventually lead to hepatic dysfunction. Selenium-doped carbon quantum dots (Se-CQDs) with an excellent redox-responsive property can effectively scavenge ROS and protect cells from oxidation. However, the accumulation of Se-CQDs in the liver is extremely low. To address this concern, the fabrication of Se-CQDs-lecithin nanoparticles (Se-LEC NPs) is developed through self-assembly mainly driven by the noncovalent interactions. Lecithin acting as the self-assembly building block also makes a pivotal contribution to the therapeutic performance of Se-LEC NPs due to its capability to react with ROS. The fabricated Se-LEC NPs largely accumulate in the liver, effectively scavenge ROS and inhibit the release of inflammatory cytokines, thus exerting beneficial therapeutic efficacy on HIRI. This work may open a new avenue for the design of self-assembled Se-CQDs NPs for the treatment of HIRI and other ROS-related diseases.


Asunto(s)
Puntos Cuánticos , Daño por Reperfusión , Selenio , Humanos , Antioxidantes/farmacología , Especies Reactivas de Oxígeno , Carbono , Lecitinas , Hígado , Daño por Reperfusión/tratamiento farmacológico
2.
Crit Rev Food Sci Nutr ; 63(8): 1037-1054, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-34323634

RESUMEN

With the development of high-throughput DNA sequencing and molecular analysis technologies, next-generation probiotics (NGPs) are increasingly gaining attention as live bacterial therapeutics for treatment of diseases. However, compared to traditional probiotics, NGPs are much more vulnerable to the harsh conditions in the human gastrointestinal tract, and their functional mechanisms in the gut are more complex. Prebiotics have been confirmed to play a critical role in improving the function and viability of traditional probiotics. Defined as substrates that are selectively utilized by host microorganisms conferring a health benefit, prebiotics are also important for NGPs. This review summarizes potential prebiotics for use with NGPs and clarifies their characteristics and functional mechanisms. Then we particularly focus on illustrating the protective effects of various prebiotics by enhancing the antioxidant capacity and their resistance to digestive fluids. We also elucidate the role of prebiotics in regulating anti-bacterial effects, intestinal barrier maintenance, and cross-feeding mechanisms of NPGs. With the expanding range of candidate NGPs and prebiotic substrates, more studies need to be conducted to comprehensively elucidate the interactions between prebiotics and NGPs outside and inside hosts, in order to boost their nutritional and healthcare applications.


Asunto(s)
Microbioma Gastrointestinal , Probióticos , Humanos , Prebióticos , Probióticos/farmacología , Tracto Gastrointestinal/microbiología , Disbiosis
3.
Opt Express ; 30(25): 45288-45300, 2022 Dec 05.
Artículo en Inglés | MEDLINE | ID: mdl-36522935

RESUMEN

Due to the nonlinearity in phase shifting profilometry (PSP) system, the captured images are often distorted with fringe harmonics, resulting in inaccurate phase map and measurement. Considering the fact that the phase error can be significantly reduced by modeling high-order fringe harmonics, this work formulates the phase extraction problem - with different frequency images and high-order fringe harmonic model - as a maximum likelihood estimation (MLE). To optimize it efficiently, we thus propose a combined-frequency phase extraction (CFPE) solution by introducing a latent phase map and incorporating the famous expectation-maximization (EM) framework. As a result, our CFPE method only needs ∼5% execution time of a high-order baseline, whilst keeps the high-order accuracy. Tested on synthetic images as well as practical measurements, our CFPE method demonstrated its performance improvement of efficiency and accuracy. In addition, our detailed implementation with experimental arrangement is also provided for interested researchers.

4.
Mol Psychiatry ; 26(12): 7363-7371, 2021 12.
Artículo en Inglés | MEDLINE | ID: mdl-34385597

RESUMEN

Aberrant topological organization of whole-brain networks has been inconsistently reported in studies of patients with major depressive disorder (MDD), reflecting limited sample sizes. To address this issue, we utilized a big data sample of MDD patients from the REST-meta-MDD Project, including 821 MDD patients and 765 normal controls (NCs) from 16 sites. Using the Dosenbach 160 node atlas, we examined whole-brain functional networks and extracted topological features (e.g., global and local efficiency, nodal efficiency, and degree) using graph theory-based methods. Linear mixed-effect models were used for group comparisons to control for site variability; robustness of results was confirmed (e.g., multiple topological parameters, different node definitions, and several head motion control strategies were applied). We found decreased global and local efficiency in patients with MDD compared to NCs. At the nodal level, patients with MDD were characterized by decreased nodal degrees in the somatomotor network (SMN), dorsal attention network (DAN) and visual network (VN) and decreased nodal efficiency in the default mode network (DMN), SMN, DAN, and VN. These topological differences were mostly driven by recurrent MDD patients, rather than first-episode drug naive (FEDN) patients with MDD. In this highly powered multisite study, we observed disrupted topological architecture of functional brain networks in MDD, suggesting both locally and globally decreased efficiency in brain networks.


Asunto(s)
Trastorno Depresivo Mayor , Encéfalo , Mapeo Encefálico , Humanos , Imagen por Resonancia Magnética/métodos , Vías Nerviosas , Tamaño de la Muestra
5.
Int J Med Sci ; 18(16): 3644-3651, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-34790036

RESUMEN

Emerging evidence suggests that immune-inflammatory processes are key elements in the physiopathological events associated with traumatic brain injury (TBI). TBI is followed by T-cell-specific immunological changes involving several subsets of T-helper cells and the cytokines they produce; these processes can have opposite effects depending on the disease course and cytokine concentrations. Efforts are underway to identify the T-helper cells and cytokine profiles associated with prognosis. These predictors may eventually serve as effective treatment targets to decrease morbidity and mortality and to improve the management of TBI patients. Here, we review the immunological response to TBI, the possible molecular mechanisms of this response, and therapeutic strategies to address it.


Asunto(s)
Lesiones Traumáticas del Encéfalo/inmunología , Sistema Inmunológico/fisiología , Linfocitos T Colaboradores-Inductores/fisiología , Lesiones Traumáticas del Encéfalo/diagnóstico , Lesiones Traumáticas del Encéfalo/patología , Humanos , Inflamación/inmunología , Inflamación/patología
6.
Int J Med Sci ; 18(1): 128-136, 2021.
Artículo en Inglés | MEDLINE | ID: mdl-33390781

RESUMEN

Background: Traumatic brain injury (TBI) is a sudden trauma on the head, in which severe TBI (sTBI) is usually associated with death and long-term disability. MicroRNAs (miRNAs) are potential biomarkers of diverse diseases, including TBI. However, few systematic reviews and meta-analyses have been conducted to determine the clinical value of miRNAs expression in TBI patients. Methods: We conducted this systematic review and meta-analysis study according to Preferred Reporting Items for Systematic Reviews and Meta-Analyses (PRISMA) guidelines. We searched PubMed, Embase, the Cochrane Library, Web of Science, from inception to August 26, 2020. We included articles written in English that have reported on the diagnostic value of miRNAs expression in TBI patients. We excluded studies that did not provided sufficient information to construct the 2×2 contingency table. Results: Eight studies investigating the diagnostic value of miRNA in TBI were analyzed in this study. The overall sensitivity, specificity and area under the curve (AUC) of miRNAs in diagnosis of TBI were 89% [95% confidence interval (CI): 0.84-0.93], 92% (95% CI 0.82-0.97) and 95% (95% CI 0.93-0.97). We found that panels of multiple miRNAs could improve the diagnostic accuracy of TBI. Samples from blood and brain tissue have significantly enhanced diagnostic accuracy, when compared with saliva. The AUC of miRNAs in severe TBI was 0.97, with 91% sensitivity and 92% specificity. Conclusion: This systematic review and meta-analysis demonstrated that miRNAs could be potential diagnostic markers in TBI patients. MiRNAs detected in blood and brain tissue display high accuracy for TBI diagnosis.


Asunto(s)
Lesiones Traumáticas del Encéfalo/diagnóstico , Encéfalo/patología , MicroARNs/análisis , Biomarcadores/análisis , Biomarcadores/metabolismo , Lesiones Traumáticas del Encéfalo/sangre , Lesiones Traumáticas del Encéfalo/patología , Perfilación de la Expresión Génica , Humanos , MicroARNs/metabolismo , Curva ROC , Saliva/química
7.
J Nanobiotechnology ; 19(1): 330, 2021 Oct 20.
Artículo en Inglés | MEDLINE | ID: mdl-34670552

RESUMEN

BACKGROUND: Supramolecular theranostics have exhibited promising potentials in disease diagnosis and therapy by taking advantages of the dynamic and reversible nature of non-covalent interactions. It is extremely important to figure out the stability of the driving forces in physiological environment for the preparation of theranostic systems. METHODS: The host-guest complexation between cucurbit[8]uril (CB[8]), 4,4'-bipyridinium, and napththyl guest was fully studied using various characterizations, including nuclear magnetic resonance spectroscopy, ultraviolet-visible (UV-vis) spectroscopy, isothermal titration calorimetry (ITC). The association constants of this ternary complex were determined using isothermal titration calorimetry. The stability of the non-covalent interactions and self-assemblies form from this molecular recognition was confirmed by UV-vis spectroscopy and dynamic light scattering (DLS). A supramolecular nanomedicine was constructed on the basis of this 1:1:1 ternary recognition, and its in vitro and in vivo anticancer efficacy were thoroughly evaluated. Positron emission tomography (PET) imaging was used to monitor the delivery and biodistribution of the supramolecular nanomedicine. RESULTS: Various experiments confirmed that the ternary complexation between 4,4'-bipyridinium, and napththyl derivative and CB[8] was stable in physiological environment, including phosphate buffered solution and cell culture medium. Supramolecular nanomedicine (SNM@DOX) encapsulating a neutral anticancer drug (doxrubincin, DOX) was prepared based on this molecular recognition that linked the hydrophobic poly(ε-caprolactone) chain and hydrophilic polyethylene glycol segment. The non-covalent interactions guaranteed the stability of SNM@DOX during blood circulation and promoted its tumor accumulation by taking advantage of the enhanced permeability and retention effect, thus greatly improving the anti-tumor efficacy as compared with the free drug. CONCLUSION: Arising from the host-enhanced charge-transfer interactions, the CB[8]-based ternary recognition was stable enough in physiological environment, which was suitable for the fabrication of supramolecular nanotheranostics showing promising potentials in precise cancer diagnosis and therapy.


Asunto(s)
Hidrocarburos Aromáticos con Puentes , Sistemas de Liberación de Medicamentos/métodos , Imidazoles , Nanomedicina Teranóstica/métodos , Animales , Antibióticos Antineoplásicos/química , Antibióticos Antineoplásicos/farmacocinética , Hidrocarburos Aromáticos con Puentes/química , Hidrocarburos Aromáticos con Puentes/farmacocinética , Hidrocarburos Aromáticos con Puentes/toxicidad , Caproatos/química , Doxorrubicina/química , Doxorrubicina/farmacocinética , Estabilidad de Medicamentos , Femenino , Células Hep G2 , Humanos , Imidazoles/química , Imidazoles/farmacocinética , Imidazoles/toxicidad , Lactonas/química , Ratones , Ratones Desnudos , Tomografía de Emisión de Positrones , Análisis Espectral , Distribución Tisular , Ensayos Antitumor por Modelo de Xenoinjerto
8.
BMC Neurol ; 20(1): 92, 2020 Mar 13.
Artículo en Inglés | MEDLINE | ID: mdl-32169039

RESUMEN

BACKGROUND: To investigate predictors of postoperative acute intracranial hemorrhage (AIH) and recurrence of chronic subdural hematoma (CSDH) after burr hole drainage. METHODS: A multicenter retrospective study of patients who underwent burr hole drainage for CSDH between January 2013 and March 2019. RESULTS: A total of 448 CSDH patients were enrolled in the study. CSDH recurrence occurred in 60 patients, with a recurrence rate of 13.4%. The mean time interval between initial burr hole drainage and recurrence was 40.8 ± 28.3 days. Postoperative AIH developed in 23 patients, with an incidence of 5.1%. The mean time interval between initial burr hole drainage and postoperative AIH was 4.7 ± 2.9 days. Bilateral hematoma, hyperdense hematoma and anticoagulant drug use were independent predictors of recurrence in the multiple logistic regression analyses. Preoperative headache was an independent risk factor of postoperative AIH in the multiple logistic regression analyses, however, intraoperative irrigation reduced the incidence of postoperative AIH. CONCLUSIONS: This study found that bilateral hematoma, hyperdense hematoma and anticoagulant drug use were independently associated with CSDH recurrence. Clinical presentation of headache was the strongest predictor of postoperative AIH, and intraoperative irrigation decreased the incidence of postoperative AIH.


Asunto(s)
Hematoma Subdural Crónico/cirugía , Hemorragias Intracraneales/epidemiología , Trepanación/efectos adversos , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , China/epidemiología , Drenaje , Femenino , Hematoma Subdural Crónico/epidemiología , Humanos , Incidencia , Hemorragias Intracraneales/etiología , Masculino , Persona de Mediana Edad , Recurrencia , Estudios Retrospectivos , Factores de Riesgo , Adulto Joven
9.
Int J Med Sci ; 15(8): 782-787, 2018.
Artículo en Inglés | MEDLINE | ID: mdl-30008587

RESUMEN

Hyperbaric oxygen therapy (HBOT) is an efficient therapeutic option to improve progress of lots of diseases especially hypoxia-related injuries, and has been clinically established as a wide-used therapy for patients with carbon monoxide poisoning, decompression sickness, arterial gas embolism, problematic wound, and so on. In the liver, most studies positively evaluated HBOT as a potential therapeutic option for liver transplantation, acute liver injury, nonalcoholic steatohepatitis, fibrosis and cancer, especially for hepatic artery thrombosis. This might mainly attribute to the anti-oxidation and anti-inflammation of HBOT. However, some controversies are existed, possibly due to hyperbaric oxygen toxicity. This review summarizes the current understandings of the role of HBOT in liver diseases and hepatic regeneration. Future understanding of HBOT in clinical trials and its in-depth mechanisms may contribute to the development of this novel adjuvant strategy for clinical therapy of liver diseases.


Asunto(s)
Oxigenoterapia Hiperbárica , Hepatopatías/terapia , Humanos , Regeneración Hepática
10.
Zhejiang Da Xue Xue Bao Yi Xue Ban ; 46(6): 675-678, 2017 05 25.
Artículo en Zh | MEDLINE | ID: mdl-29658673

RESUMEN

Enhanced recovery after surgery (ERAS) has been widely used in perioperative optimization. As an important component of ERAS, rehabilitation medicine mainly focuses on perioperative physical fitness management, respiratory training, exercise training to reduce the incidence of postoperative pulmonary infection, improve gastrointestinal and cardiopulmonary function. This paper explains rehabilitation medicine for respiratory, musculoskeletal, cardiovascular and digestive systems during the perioperative period.


Asunto(s)
Atención Perioperativa , Complicaciones Posoperatorias , Rehabilitación , Humanos , Complicaciones Posoperatorias/prevención & control , Periodo Posoperatorio , Rehabilitación/métodos , Rehabilitación/normas
11.
Diabetes Metab Syndr ; 18(5): 103038, 2024 May.
Artículo en Inglés | MEDLINE | ID: mdl-38749096

RESUMEN

AIMS: We aimed to prospectively evaluate the association of sarcopenic obesity (SO) with the incidence risk of heart failure (HF), and the mediating role of metabolomics and inflammation in people with type 2 diabetes (T2D). METHODS: 22,496 participants with T2D from the UK Biobank were included. SO was defined as the combination of obesity (body mass index ≥30 kg/m2) and sarcopenia (grip strength <27 kg in male or <16 kg in female). The incident HF was identified through linked hospital records. Cox proportional hazard regression models were used to estimate the associations. Mediation analysis was conducted to evaluate the mediating effect of the "metabolomic risk score" of HF, which was derived from 168 plasma metabolites through LASSO regression, and five inflammatory markers (e.g., C-reactive protein [CRP] level) on the aforementioned associations. RESULTS: 1946 (8.7 %) participants developed HF during a median follow-up of 12.0 years. Compared to participants with neither obesity nor sarcopenia, those with obesity & non-sarcopenia (hazard ratio [HR]: 1.80, 95 % confidence interval [CI]: 1.62, 2.00), sarcopenia & non-obesity (HR: 1.90, 95 % CI: 1.56, 2.31) and SO (HR: 2.29, 95 % CI: 1.92, 2.73) showed a higher risk of HF. The metabolomic risk score (20.0 %) and CRP (20.4 %) meditated this association. CONCLUSIONS: SO was associated with an increased risk of HF in people with T2D and metabolomics and inflammation partially mediated this association. Our findings suggest the importance of managing obesity and muscle strength simultaneously in preventing HF among people with T2D and shed light on the underlying mechanisms.


Asunto(s)
Diabetes Mellitus Tipo 2 , Insuficiencia Cardíaca , Inflamación , Obesidad , Sarcopenia , Humanos , Sarcopenia/epidemiología , Sarcopenia/sangre , Sarcopenia/etiología , Sarcopenia/complicaciones , Diabetes Mellitus Tipo 2/complicaciones , Masculino , Femenino , Obesidad/complicaciones , Estudios Prospectivos , Insuficiencia Cardíaca/epidemiología , Insuficiencia Cardíaca/etiología , Persona de Mediana Edad , Inflamación/complicaciones , Estudios de Seguimiento , Pronóstico , Anciano , Biomarcadores/sangre , Biomarcadores/análisis , Factores de Riesgo , Incidencia
12.
Neurorehabil Neural Repair ; 38(7): 527-538, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-38752465

RESUMEN

OBJECTIVE: The aim of the paper was to investigate the composition and structure of intestinal flora in patients with cerebral ischemic stroke (CIS), and to investigate the relationship between gut microbiota (GM) and different levels of stroke severity. METHODS: In this study, 47 CIS patients (16 mild, 21 moderate, and 10 severe) and 15 healthy controls were included. General information, clinical data, and behavioral scores of the enrolled subjects were collected. Deoxyribonucleic acid in fecal intestinal flora was extracted and detected using high-throughput Illumina 16S ribosomal ribonucleic acid sequencing technology. Finally, the correlation between the community composition of intestinal microbiota and National Institutes of Health Stroke Scale (NIHSS) score in CIS patients was analyzed. RESULTS: Compared with healthy controls, there was no statistically significant difference in Alpha diversity among CIS patients, but the principal coordinate analysis showed significant differences in the composition of the GM among stroke patients with different degrees of severity and controls. In CIS patients, Streptococcus was significantly enriched, and Eshibacter-Shigella, Bacteroides, and Agathobacter were significantly down-regulated (P < .05). In addition, the relative abundance of Blautia was negatively correlated with the NIHSS score. CONCLUSIONS: Our results show that different degrees of CIS severity exert distinct effects on the intestinal microbiome. This study reveals the intestinal microecological changes after brain injury from the perspective of brain-gut axis. Intestinal microorganisms not only reveal the possible pathological process and indicate the severity of neurologic impairment, but also make targeted therapy possible for CIS patients.


Asunto(s)
Microbioma Gastrointestinal , Accidente Cerebrovascular Isquémico , Humanos , Microbioma Gastrointestinal/fisiología , Masculino , Accidente Cerebrovascular Isquémico/microbiología , Accidente Cerebrovascular Isquémico/complicaciones , Femenino , Persona de Mediana Edad , Anciano , Índice de Severidad de la Enfermedad , Heces/microbiología , ARN Ribosómico 16S
13.
J Nutr Health Aging ; 28(8): 100313, 2024 Jul 09.
Artículo en Inglés | MEDLINE | ID: mdl-38986174

RESUMEN

OBJECTIVE: To investigate the associations between dynapenic obesity and the risk of dementia, and the modifying effects of age, sex, and the APOE gene, using a large population-based cohort. METHODS: 279,884 participants aged 55 and above from the UK Biobank were included. The participants were classified into four categories based on body mass index and hand grip strength: healthy, obesity, dynapenia, and dynapenic obesity. The incident dementia was identified based on linked hospital records and death register data. Cox proportional hazards regression models were used to estimate the associations, followed by age-, sex-, and apolipoprotein E (APOE) gene-stratified analyses. RESULTS: During the median follow-up of 12.4 years, 5,170 (1.8%) participants developed dementia. Compared with the healthy group, participants with dynapenic obesity had 67% higher dementia risk (hazard ratio [HR]: 1.67, 95% confidence interval [CI]: 1.44-1.94). Compared with the healthy group, higher risks of dementia in participants with dynapenic obesity were respectively observed in male (HR: 2.03, 95% CI: 1.65-2.50), younger (<65 years, HR: 1.97, 95% CI: 1.55-2.50), and non-ε4-carrier (HR: 1.97, 95% CI: 1.60-2.44) (all P for interaction <0.05). In participants under 65 years and non-ε4-carrier, those with dynapenic obesity had the highest risk of dementia (HR: 2.63, 95% CI: 1.91-3.62), compared with the healthy group (P for second order interaction = 0.026). CONCLUSIONS: Dynapenic obesity is associated with increased risks of dementia, especially in participants under 65 years and non-ε4-carrier, suggesting the importance of managing dynapenic obesity in the prevention of cognition-related disorders.

14.
Food Funct ; 15(6): 3174-3185, 2024 Mar 18.
Artículo en Inglés | MEDLINE | ID: mdl-38441259

RESUMEN

Objective: To examine the associations of dietary patterns with frailty and whether metabolic signatures (MSs) mediate these associations. Methods: We used UK Biobank data to examine (1) the associations of four dietary patterns (i.e., alternate Mediterranean diet [aMED], Recommended Food Score [RFS], Dietary Approaches to Stop Hypertension [DASH] and Mediterranean-DASH Intervention for Neurodegenerative Delay [MIND] diet) with frailty (measured by the frailty phenotype and the frailty index) using multivariable logistic regression (analytic sample 1: N = 124 261; mean age = 57.7 years), and (2) the mediating role of MSs (weighted sums of the metabolites selected from 168 plasma metabolites using the LASSO algorithm) in the above associations via mediation analysis (analytic sample 2: N = 26 270; mean age = 57.7 years). Results: Four dietary patterns were independently associated with frailty (all P < 0.001). For instance, compared to participants in the lowest tertile for RFS, those in the intermediate (odds ratio [OR]: 0.81; 95% confidence interval [CI]: 0.74, 0.89) and highest (OR: 0.62; 95% CI: 0.56, 0.68) tertiles had a lower risk of frailty. We found that 98, 68, 123 and 75 metabolites were associated with aMED, RFS, DASH and MIND, respectively, including 16 common metabolites (e.g., fatty acids, lipoproteins, acetate and glycoprotein acetyls). The MSs based on these metabolites partially mediated the association of the four dietary patterns with frailty, with the mediation proportion ranging from 26.52% to 45.83%. The results were robust when using another frailty measure, the frailty index. Conclusions: The four dietary patterns were associated with frailty, and these associations were partially mediated by MSs. Adherence to healthy dietary patterns may potentially reduce frailty development by modulating metabolites.


Asunto(s)
Dieta Mediterránea , Fragilidad , Humanos , Persona de Mediana Edad , Patrones Dietéticos , Metabolómica , Algoritmos
15.
Materials (Basel) ; 16(13)2023 Jun 29.
Artículo en Inglés | MEDLINE | ID: mdl-37445025

RESUMEN

Vertical stirred mills (VSM) are widely used for powder processing in many situations like mechanical alloying preparation and raw material crushing and shaping. Many structural and operational parameters like stirrer helix angle and rotating speed have great significance on VSM performance, especially in a large industry-scale situation. Therefore, it becomes essential to investigate these parameters systematically to obtain high energy efficiency and good product quality. In this work, the discrete element method (DEM) was used to examine the effects of stirrer helix angle (α), stirrer diameter (d), and rotating speed (n) on the grinding performance in an industrial VSM, and then the response surface method (RSM) was employed for multi-objective optimization in the VSM. It is found that a media vortex phenomenon may happen near the stirring shaft. The media collisions are significantly influenced by α, d, and n. Through multi-objective optimization design (MOD), the power consumption (P) of the stirrer reduced by 8.09%. The media collision energy (E) increased by 9.53%. The energy conversion rate (R) rises by 20.70%. The collision intensity and frequency are both improved. This optimization method can help determine good operating parameters based on certain structures.

16.
Brain Res ; 1799: 148149, 2023 01 15.
Artículo en Inglés | MEDLINE | ID: mdl-36335996

RESUMEN

OBJECTIVES: Recent evidence suggests that there is a link between gut and brain via microbial, immune, endocrine and neural signaling pathways, but the changes of gut-brain axis following brain trauma has not yet been clearly shown. The aim of this study was to reveal the gut microbiota and transcriptomic profile of the cerebral cortex in traumatic brain injury (TBI) mice. METHODS: A controlled cortical impact (CCI) device was used to establish a TBI model. Behavioral testing and histopathological analysis were performed. The gut microbiota was analyzed by 16S rRNA sequencing, and gene expression in the cerebral cortex was detected by whole-transcriptome sequencing (RNA-Seq) 7 days after TBI. RESULTS: The analysis of 16S rRNA sequencing data indicated that TBI increased the relative abundance of Bifidobacterium. The TBI group showed a disturbance in intestinal flora. RNA-Seq analysis identified 523 differentially expressed genes (481 upregulated and 42 downregulated) in the cerebral cortex of the TBI group compared with the sham group. Cluster analysis revealed 93 immune system process-related genes and 55 inflammatory response-related genes that were differentially expressed. CONCLUSIONS: This manuscript reports pathogenic changes via the gut-brain axis driven by TBI, which confer persistent symptoms and susceptibility to neurodegeneration.


Asunto(s)
Lesiones Traumáticas del Encéfalo , Microbioma Gastrointestinal , Ratones , Animales , Microbioma Gastrointestinal/genética , Transcriptoma , ARN Ribosómico 16S/genética , Lesiones Traumáticas del Encéfalo/metabolismo , Encéfalo/metabolismo
17.
Nanoscale ; 15(11): 5379-5390, 2023 Mar 16.
Artículo en Inglés | MEDLINE | ID: mdl-36825767

RESUMEN

Mild thermal stimulation in vivo could induce osteogenic differentiation of bone marrow mesenchymal stem cells (BMSCs). In this study, nano-functionalized photothermal extracellular matrix (ECM) nanocomposite films were obtained through adding graphene during cell culture, so that graphene could directly integrate with the ECM secreted by cells. Owing to the similarity of the ECM to the in vivo microenvironment and the apparent photothermal effect of graphene nanoflakes, heat could be generated and transferred at the material-cell interface in a biomimetic way. It was demonstrated that such nanocomposite films achieved an interface temperature rise with light illumination. This could be easily sensed by BMSCs through the ECM. According to alkaline phosphatase, osteogenic related gene expression, mineral deposition, and upregulated expression of heat shock protein (HSP70) and p-ERK, composite films with proper illumination significantly promoted the differentiation of BMSCs into osteoblasts. This work endeavors to study the thermal regulation of BMSC differentiation and provide a new perspective on biocompatible osteo-implant materials which can be remotely controlled.


Asunto(s)
Grafito , Células Madre Mesenquimatosas , Nanocompuestos , Osteogénesis , Grafito/farmacología , Grafito/metabolismo , Células Cultivadas , Matriz Extracelular/metabolismo , Diferenciación Celular , Células de la Médula Ósea
18.
Front Neurol ; 14: 1084223, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37139070

RESUMEN

Brachial plexus injury (BPI) is one of the most serious peripheral nerve injuries, resulting in severe and persistent impairments of the upper limb and disability in adults and children alike. With the relatively mature early diagnosis and surgical technique of brachial plexus injury, the demand for rehabilitation treatment after brachial plexus injury is gradually increasing. Rehabilitation intervention can be beneficial to some extent during all stages of recovery, including the spontaneous recovery period, the postoperative period, and the sequelae period. However, due to the complex composition of the brachial plexus, location of injury, and the different causes, the treatment varies. A clear rehabilitation process has not been developed yet. Rehabilitation therapy that has been widely studied focusing on exercise therapy, sensory training, neuroelectromagnetic stimulation, neurotrophic factors, acupuncture and massage therapy, etc., while interventions like hydrotherapy, phototherapy, and neural stem cell therapy are less studied. In addition, rehabilitation methods in some special condition and group often neglected, such as postoperative edema, pain, and neonates. The purpose of this article is to explore the potential contributions of various methods to brachial plexus injury rehabilitation and to provide a concise overview of the interventions that have been shown to be beneficial. The key contribution of this article is to form relatively clear rehabilitation processes based on different periods and populations, which provides an important reference for the treatment of brachial plexus injuries.

19.
Colloids Surf B Biointerfaces ; 221: 112980, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36356402

RESUMEN

Surface potential of biomaterials is found to be important for wound healing. Here, poly(vinylidenefluoride-co-trifluoroethylene) (P(VDF-TrFE)) films with different surface potentials and piezoelectric responses were prepared and explored for the effect of surface potential on wound healing. The crystalline state of P(VDF-TrFE) films were characterized with X-ray diffraction (XRD), differential scanning calorimetry (DSC) and Fourier-transformed infrared spectroscopy (FTIR), illustrated that the electric polarization will promote the crystallization of the ß phase of P(VDF-TrFE), in which the content of ß phase increased from 82.9 % to 86.8 % compared with the control. Then, Kelvin potential and piezoelectric coefficient d33 were to evaluate surface potential and polarization performance. Moreover, bovine serum albumin (BSA) adsorption and cell culture results showed that high surface potential can promote protein adsorption as well as fibroblast proliferation and macrophage polarization. Finally, in vivo experiments indicated that high voltage polarized P(VDF-TrFE) films can generate higher dynamic potential up to 2.3 V, and promoted wound healing from the phases of inflammation, proliferation and remodeling, the wound healing rate of which was 88.8 % ± 0.8 %, significantly higher than 79.1 % ± 2.5 % and 86.4 % ± 1.8 % of blank and control. In general, this work revealed that polarized P(VDF-TrFE) films can promote wound healing, shed light on designing wound healing materials with similar properties.


Asunto(s)
Materiales Biocompatibles , Polivinilos , Polivinilos/química , Materiales Biocompatibles/química , Electricidad , Cicatrización de Heridas
20.
Front Neurol ; 14: 1081458, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-36908597

RESUMEN

Peripheral nerve injury is common and frequently occurs in extremity trauma patients. The motor and sensory impairment caused by the injury will affect patients' daily life and social work. Surgical therapeutic approaches don't assure functional recovery, which may lead to neuronal atrophy and hinder accelerated regeneration. Rehabilitation is a necessary stage for patients to recover better. A meaningful role in non-pharmacological intervention is played by rehabilitation, through individualized electrical stimulation therapy. Clinical studies have shown that electrical stimulation enhances axon growth during nerve repair and accelerates sensorimotor recovery. According to different effects and parameters, electrical stimulation can be divided into neuromuscular, transcutaneous, and functional electrical stimulation. The therapeutic mechanism of electrical stimulation may be to reduce muscle atrophy and promote muscle reinnervation by increasing the expression of structural protective proteins and neurotrophic factors. Meanwhile, it can modulate sensory feedback and reduce neuralgia by inhibiting the descending pathway. However, there are not many summary clinical application parameters of electrical stimulation, and the long-term effectiveness and safety also need to be further explored. This article aims to explore application methodologies for effective electrical stimulation in the rehabilitation of peripheral nerve injury, with simultaneous consideration for fundamental principles of electrical stimulation and the latest technology. The highlight of this paper is to identify the most appropriate stimulation parameters (frequency, intensity, duration) to achieve efficacious electrical stimulation in the rehabilitation of peripheral nerve injury.

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