Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 447
Filtrar
1.
Int J Biol Macromol ; 281(Pt 3): 136329, 2024 Oct 08.
Artigo em Inglês | MEDLINE | ID: mdl-39383923

RESUMO

Polyacrylamide (PAM) is a high molecular weight polymer with extensive applications. However, inefficient natural degradation of PAM results in its environmental accumulation. Here, using multi-omics analysis, we constructed the PAM biodegradation pathway in Klebsiella sp. PCX, an efficient PAM-degrading bacterium. Subsequently, two unclassified amidohydrolases (PCX00451 and PCX04581) were identified as key factors for rapid PAM biodegradation, both of which possessed much higher hydrolysis efficiency for PAM than for small molecule amide compounds. Besides, crystal structures of PCX00451 and PCX04581 were solved. Both two amidohydrolases were consisted with a twisted triosephosphateisomerase (TIM)-barrel and a smaller ß-sandwich domain. And their binding pockets were in the conserved metal center of TIM-barrel domain. Moreover, Asp267 of PCX00451 and Asp282 of PCX04581 were examined as active sites for acid/base catalysis. Our research characterized the molecular mechanisms of two efficient amidohydrolases, providing theoretical basis and valuable tools for PAM bioremediation.

2.
Disabil Rehabil ; : 1-6, 2024 Oct 23.
Artigo em Inglês | MEDLINE | ID: mdl-39440851

RESUMO

Maintenance hemodialysis patients' psychology and physiology will have negative effects. Adherence to exercise can effectively enhance the physical function of maintenance hemodialysis patients and reduce the negative psychological emotions. In recent years, virtual reality technology has been gradually applied to the hemodialysis group, providing a new way for the rehabilitation training and healthy life of maintenance hemodialysis patients. OBJECTIVES: To understand the real experience of maintenance hemodialysis patients participating in virtual reality rehabilitation training, and to make reference for the future clinical development of a more perfect virtual reality rehabilitation training program. METCHODS: Phenomenological research method was used to conduct semi-structured interviews with 10 maintenance hemodialysis patients, and the interview data were compiled and analyzed using Colaizzi's seven-step analysis. RESULTS: Four themes were distilled: (1) Maintenance hemodialysis patients' overall perceptual experience of the virtual reality rehabilitation system; (2) Physical and psychological improvement of maintenance hemodialysis patients with virtual reality rehabilitation system; (3) Individualized needs of maintenance hemodialysis patients during virtual reality rehabilitation training; (4) Future improvements and recommendations for the virtual reality rehabilitation system. CONCLUSION: The results of the study suggest that virtual reality improves patients' motivation to recover and shows positive results and potential benefits in improving physical functioning and negative emotions in maintenance hemodialysis patients.


Regular and continuous rehabilitation training is a very effective non-pharmacological treatment to improve the physical functioning and mental health of maintenance hemodialysis patients.Virtual reality technology can stimulate the underlying motivation of maintenance hemodialysis patients to undergo rehabilitation, thus, they are guided to adopt a healthy lifestyle.Virtual reality technology can be an effective aid in the rehabilitation of maintenance hemodialysis patients, thus reducing the workload of rehabilitation clinicians.

3.
Wound Manag Prev ; 70(3)2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39361350

RESUMO

BACKGROUND: Peristomal skin complications (PSCs) are the most common complication among patients with ostomies after ostomy creation. PURPOSE: This systematic review and meta-analysis aimed to evaluate the factors influencing the occurrence of peristomal skin complications. METHODS: A systematic review was conducted across multiple databases by using a combination of subject terms and free words for online search. The databases were searched from their inception to October 31, 2023. All studies that met inclusion criteria were examined to identify risk factors for PSCs. Two researchers independently conducted literature screening and information extraction, evaluated the literature quality using the Newcastle-Ottawa Scale, and performed descriptive analysis of the results. RESULTS: Ten studies were included in this review. A total of 3753 patients with ostomies participated in the studies, and 981 patients suffered from PSCs, with PSC incidence ranging from 15.5% to 47.7%. Type of ostomy, diabetes, self-care knowledge, and chemotherapy were significant factors associated with PSCs. CONCLUSION: This review highlighted 4 factors that influence the occurrence of peristomal skin complications. The quality of included literature is generally low, with significant heterogeneity in study design and choice of outcome indicators. Therefore, further research involving high-quality studies with larger sample sizes is needed for deeper investigation.


Assuntos
Estomia , Humanos , Estomia/efeitos adversos , Estomia/estatística & dados numéricos , Complicações Pós-Operatórias/epidemiologia , Complicações Pós-Operatórias/etiologia , Fatores de Risco , Dermatopatias/epidemiologia , Dermatopatias/etiologia
4.
Br J Hosp Med (Lond) ; 85(10): 1-17, 2024 Oct 30.
Artigo em Inglês | MEDLINE | ID: mdl-39475020

RESUMO

AIMS/BACKGROUND: Liver transplantation specialist nurses provide comprehensive and safe care for liver transplant patients, which requires them to have a wide range of competencies. However, at present, there is no comprehensive understanding of the competency of liver transplantation specialist nurses in China, and there is a lack of comprehensive evaluation indicators. The purpose of this study was to construct a competency evaluation indicator system for specialist nurses in liver transplantation. METHODS: Utilizing the "Iceberg model" of competency, the indicator system for evaluating the competency of liver transplant specialist nurses was developed through literature review, semi-structured interviews, and two rounds of Delphi expert consultation. RESULTS: Twenty nursing and medical experts in liver transplantation were consulted over two rounds. The effective response rates for the expert consultation questionnaires were 90.91% and 100.00% for the first and second rounds, respectively. The coefficient of expert judgment was 0.920, the coefficient of familiarity was 0.880, and the authority coefficient was 0.900. The value range of the coefficient of variation in the second round was 0.00-0.16, both <0.25, indicating that the degree of coordination of expert opinions was high. The final competency evaluation index system for liver transplant specialist nurses encompassed 6 primary indicators, 17 secondary indicators, and 59 tertiary indicators, including professional knowledge, professional skills, social role, self-concept, personality quality, and motivation. CONCLUSION: The developed competency evaluation indicator system for liver transplant specialist nurses possesses scientific validity and reliability, offering a reference for the training and assessment of liver transplant specialist nurses.


Assuntos
Competência Clínica , Técnica Delphi , Transplante de Fígado , Humanos , Competência Clínica/normas , China , Inquéritos e Questionários , Feminino , Masculino , Adulto , Enfermeiros Especialistas
5.
Medicine (Baltimore) ; 103(42): e40101, 2024 Oct 18.
Artigo em Inglês | MEDLINE | ID: mdl-39432653

RESUMO

The purpose of this study was to analyze the impact of implementing a driver's license-type scoring system on the quality management of hospital medical records. We collected relevant medical record quality control data before (from April to November 2021) and after (from April to November 2022) the use of the driver's license-type scoring management in the medical record quality management of a Grade-A tertiary general hospital in a prefecture-level city ("R Hospital" for short). We evaluated the impact by statistically analyzing the data using the χ2 test and t test with the SPSSAU online statistical analysis software. Compared with before the implementation of the new system, the filling rate of discharge medical records within 2 days, logical rate of day diagnosis and treatment medical records, logical rate of day surgery medical records, and clinical tumor-node-metastasis staging evaluation rate before tumor treatment significantly increased, and the difference was statistically significant (P < .05); the rate of errors or omissions on the first page of inpatient medical records significantly decreased, and the difference between before and after implementation of the new system was statistically significant (P < .05). We found that the driver's license-type scoring management adapted for use in the quality management of hospital medical records was effective in regulating the medical record writing behavior of physicians and improved the quality of medical records, thus meriting wide promotion.


Assuntos
Prontuários Médicos , Humanos , Prontuários Médicos/normas , Licenciamento , Controle de Qualidade , Condução de Veículo , Centros de Atenção Terciária
6.
Heliyon ; 10(20): e38530, 2024 Oct 30.
Artigo em Inglês | MEDLINE | ID: mdl-39449709

RESUMO

Background: Scientific and technological innovation has become the "key variable" of national social and economic development. Nurses' innovation ability can improve the quality of patient care, thus shorten the hospital stay, reduce the medical costs, and promote the rapid development of the nursing industry. Nowadays nurses have gradually involved in various innovation, but less concerns are focus on the evaluation of nurse's innovation competence. Objective: To develop evaluation index system for nurse's innovation competence. Participants: Eleven experts with innovation experience from different regions in China. Methods: Literature review and qualitative interview were used to establish first version of index system. Then, a two-round Delphi expert consultation was conducted to collect opinions from 11 experts. Then the final version of nurses' innovation competence evaluation index was used in one tertiary hospital for preliminary application. Results: The response rate of the two rounds was more than 90%, the expert familiarity coefficient was 0.818, the judgment coefficient was 0.918, and the authority coefficient was 0.868. The two rounds of expert coordination coefficient test showed P < 0.05. The evaluation index system of nurses' innovation competence includes 4 first-level indicators, 9 second-level indicators and 36 third-level indicators. The scores of innovation production and innovation subject were the lowest among all the first-level indicators when use this index for preliminary application. Conclusion: The constructed evaluation index system of nurses' innovation competence are scientific, reliable and practical, and can be used to promote nurse's innovation competence and innovation conversion competence in clinical practice. Hospital managers should pay more attention on cultivate nurse's innovation competence and provide resources and multi-form platforms to support the nurses with innovative ideas and willingness.

7.
Cell Metab ; 36(10): 2281-2297.e7, 2024 Oct 01.
Artigo em Inglês | MEDLINE | ID: mdl-39305895

RESUMO

Macrophage-mediated inflammation has been implicated in the pathogenesis of metabolic dysfunction-associated steatohepatitis (MASH); however, the immunometabolic program underlying the regulation of macrophage activation remains unclear. Beta-arrestin 2, a multifunctional adaptor protein, is highly expressed in bone marrow tissues and macrophages and is involved in metabolism disorders. Here, we observed that ß-arrestin 2 expression was significantly increased in the liver macrophages and circulating monocytes of patients with MASH compared with healthy controls and positively correlated with the severity of metabolic dysfunction-associated steatotic liver disease (MASLD). Global or myeloid Arrb2 deficiency prevented the development of MASH in mice. Further study showed that ß-arrestin 2 acted as an adaptor protein and promoted ubiquitination of immune responsive gene 1 (IRG1) to prevent increased itaconate production in macrophages, which resulted in enhanced succinate dehydrogenase activity, thereby promoting the release of mitochondrial reactive oxygen species and M1 polarization. Myeloid ß-arrestin 2 depletion may be a potential approach for MASH.


Assuntos
Macrófagos , Camundongos Endogâmicos C57BL , beta-Arrestina 2 , Animais , beta-Arrestina 2/metabolismo , Camundongos , Humanos , Macrófagos/metabolismo , Masculino , Camundongos Knockout , Fígado Gorduroso/metabolismo , Fígado Gorduroso/patologia , Feminino , Espécies Reativas de Oxigênio/metabolismo , Reprogramação Metabólica
8.
9.
Front Pediatr ; 12: 1404196, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-39156015

RESUMO

Objective: This study aimed to investigate the correlation between serum 25-hydroxyvitamin D (25(OH)D) levels and retinopathy of prematurity (ROP) in premature infants one month after birth. Methods: Preterm infants (gestational age <32 weeks) admitted to the Affiliated Hospital of Qingdao University from 2017 to 2022 were divided into ROP and non-ROP groups based on ROP occurrence any stage. Serum 25(OH)D levels and clinical data were compared between the two groups at 1 month after birth, and the relationship between vitamin D levels and ROP was analyzed. Results: Among the 217 premature infants included, 55 (25.35%) were in the ROP group, and 162 (74.65%) were in the non-ROP group. The ROP group had lower gestational age and birth weight, longer invasive ventilation (IV), non-invasive ventilation (NIV), and oxygen therapy times compared to the non-ROP group. Apgar scores, cesarean delivery, and antenatal steroids ratios were lower in the ROP group, while sepsis and pulmonary surfactant utilization ratios were higher (all p < 0.05). Significant differences in serum 25-(OH)D levels were observed among children in the non-ROP group (14.20 ± 5.07 ng/ml), ROP treated group (7.891 ± 1.878 ng/ml), and untreated group (12.168 ± 4.354 ng/ml) (p < 0.001). Multivariate regression analysis identified antenatal steroids as protective factors and lower birth weight, serum 25-(OH)D levels, long-term invasive mechanical ventilation, and sepsis as independent risk factors for ROP in premature infants. Conclusion: Vitamin D, lower birth weight, long-term invasive mechanical ventilation, and sepsis were associated with incidence of ROP in preterm infants. Vitamin D was associated with the severity of ROP, emphasizing the importance of prudent vitamin D supplementation and regular monitoring of serum 25-(OH)D levels.

10.
Endosc Int Open ; 12(8): E940-E946, 2024 Aug.
Artigo em Inglês | MEDLINE | ID: mdl-39131733

RESUMO

Background and study aims Limited data exist regarding endoscopic obstruction of type I gastroesophageal (GOV I) in managing bleeding from esophageal varices. In this multicenter retrospective cohort study, we aimed to access the efficacy of blocking gastric varices in management of bleeding from esophageal varices in patients with GOV1. Patients and methods Cirrhotic patients experiencing bleeding from esophageal varices and having GOV I gastric varices in four centers were screened. All included patients were followed up for 180 days, or until death. Results A total of 93 cirrhotic patients with GOV I and bleeding esophageal varices were included. Among them, 58 patients underwent endoscopic cyanoacrylate injection (ECI) for gastric varices in addition to treatment for esophageal varices (EV), while the remaining 35 patients received treatment for EV only. Kaplan-Meier analysis demonstrated that the cumulative 180-day rebleeding rate was significantly lower in the ECI plus EV treatment group (7.9%) compared with the EV treatment group (30.7%) ( P = 0.0031). The cumulative incidence of 180-day mortality was 1.9% in the ECI plus EV treatment group and 23.9% in the EV treatment group ( P = 0.0010). Multivariable Cox regression analysis revealed that concomitant ECI treatment was an independent protective factor against 180-day rebleeding and overall mortality. Conclusions In conclusion, obstruction of gastric varices in addition to endoscopic treatment for bleeding from esophageal varices in patients with GOV 1 proved superior to endoscopic treatment alone for esophageal variceal bleeding.

11.
Chem Commun (Camb) ; 60(62): 8055-8058, 2024 Jul 30.
Artigo em Inglês | MEDLINE | ID: mdl-38993117

RESUMO

A resin-based hard carbon with rich closed pores is prepared by the in situ reconstruction of cavities formed after heteroatoms evaporated during a high-temperature carbonization process. Various characterization results confirm that rich defect sites and micropores and enlarged layer spacing in hard carbon promote Na+ transport and facilitate high-performance Na+ storage.

12.
Infect Genet Evol ; 123: 105646, 2024 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-39059733

RESUMO

BACKGROUND: To investigate the causal relationship between human papillomavirus (HPV) and lung cancer, we conducted a study using the two-sample Mendelian randomization (TSMR). METHOD: Data from genome-wide association studies (GWAS) were analyzed with HPV E7 Type 16 and HPV E7 Type 18 as exposure factors. The outcome variables included lung cancer, small cell lung cancer, adenocarcinoma and squamous cell lung cancer. Causality was estimated using inverse variance weighted (IVW), MR-Egger and weighted median methods. Heterogeneity testing, sensitivity analysis, and multiple validity analysis were also performed.. RESULTS: The results showed that HPV E7 Type 16 infection was associated with a higher risk of squamous cell lung cancer (OR = 7.69; 95% CI:1.98-29.85; p = 0.0149). HPV E7 Type 18 infection significantly increased the risk of lung adenocarcinoma (OR = 0.71; 95% CI: 0.38-1.31; p = 0.0079) and lung cancer (OR = 7.69; 95% CI:1.98-29.85; p = 0.0292). No significant causal relationship was found between HPV E7 Type 16 and lung adenocarcinoma, lung cancer, or small cell lung carcinoma, and between HPV E7 Type 18 and squamous cell lung cancer or small cell lung carcinoma. CONCLUSIONS: This study has revealed a causal relationship between HPV and lung cancers. Our findings provide valuable insights for further mechanistic and clinical studies on HPV-mediated cancer.


Assuntos
Estudo de Associação Genômica Ampla , Neoplasias Pulmonares , Análise da Randomização Mendeliana , Infecções por Papillomavirus , Humanos , Neoplasias Pulmonares/virologia , Neoplasias Pulmonares/genética , Infecções por Papillomavirus/virologia , Infecções por Papillomavirus/complicações , Polimorfismo de Nucleotídeo Único , Papillomavirus Humano 16/genética , Papillomaviridae/genética , Papillomavirus Humano
13.
J Dairy Sci ; 107(10): 7520-7532, 2024 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-38851582

RESUMO

Bacillus licheniformis is one of the major spore-forming bacteria with great genotypic diversity in raw milk, dairy ingredients, and final dairy products; it is found throughout the dairy-processing continuum. Although being widely used as a probiotic strain, this species also serves as a potential risk in the dairy industry based on its roles in foodborne illness and dairy spoilage. Biofilm formation of B. licheniformis, combined with the heat resistance of its spores, make it impossible to prevent the presence of B. licheniformis in final dairy products by using traditional cleaning and disinfection procedures. Despite the extensive efforts to identify B. licheniformis in various dairy samples, no reviews have been written on both hazards and benefits of this sporeformer. This review discusses the prevalence of B. licheniformis from raw milk to commercial dairy products, biofilm formation and spoilage potential of B. licheniformis, and possible prevention methods. In addition, the potential benefits of B. licheniformis in the dairy industry are also summarized.


Assuntos
Bacillus licheniformis , Laticínios , Leite , Animais , Leite/microbiologia , Laticínios/microbiologia , Indústria de Laticínios , Biofilmes , Probióticos , Microbiologia de Alimentos , Esporos Bacterianos
14.
Front Nutr ; 11: 1410154, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38912301

RESUMO

Background: In recent years, diseases caused by abnormal immune-inflammatory responses have become increasingly severe. Dietary intervention involving omega-3 polyunsaturated fatty acids (ω-3 PUFAs) has emerged as a potential treatment. However, research investigating the relationship between ω-3, ω-6 PUFAs, and ω-6 to ω-3 ratio with inflammatory biomarkers remains controversial. Methods: To investigate the correlation between the intake of ω-3 and ω-6 PUFAs and the ratio of ω-6: ω-3 with biomarkers of inflammation, the National Health and Nutrition Examination Survey (NHANES) data (1999 to 2020) was utilized. The systemic immune-inflammation index (SII), platelet-lymphocyte ratio (PLR), neutrophil-lymphocyte ratio (NLR), and white blood cell (WBC) were selected as study subjects. Dietary data for ω-3 and ω-6 PUFAs were collected via two 24-h dietary recall interviews. SII index and other indicators were obtained from the blood routine data. The multiple linear regression and restricted cubic spline models were utilized to evaluate the association of ω-3, ω-6 PUFAs intake, and ω-6: ω-3 ratio to SII and secondary measures. Results: This study involved a total of 43,155 American adults. ω-3 and ω-6 PUFAs exhibited negative correlations with SII, PLR, NLR, and WBC. The correlation between ω-6: ω-3 ratio and SII, PLR, NLR, and WBC was not significant. Furthermore, the dose-response relationship showed that the relationship between the intake of ω-3 and ω-6 PUFAs and SII was an "L" pattern. Conclusion: Intake of dietary ω-3 and ω-6 PUFAs reduces the levels of several inflammatory biomarkers in the body and exerts immunomodulatory effects.

15.
Dermatol Online J ; 30(1)2024 Mar 15.
Artigo em Inglês | MEDLINE | ID: mdl-38762856

RESUMO

Generalized pustular psoriasis is a rare variant of psoriasis. Evidence recommending generalized pustular psoriasis treatment with secukinumab is limited. This report aims to evaluate the use of secukinumab in two patients with generalized pustular psoriasis. The standard treatment regimen for secukinumab was as follows: 300mg subcutaneously once weekly in weeks 0-4, followed by 300mg every four weeks. The efficacy was evaluated by analyzing the psoriasis area and severity index (PASI) and dermatology life quality index (DLQI). One patient had generalized pustular psoriasis, which had developed from palmoplantar pustulosis over 12 years. The second patient was an adolescent with recurrent generalized pustular psoriasis. The first patient achieved PASI-75 response by week 3 and both PASI-90 and a DLQI score of 0 were observed by week 8. The second patient achieved PASI-75 response by week 4 and complete clinical resolution, except for nail changes, and a DLQI of 0 by week 8, without any adverse events.


Assuntos
Anticorpos Monoclonais Humanizados , Psoríase , Índice de Gravidade de Doença , Humanos , Psoríase/tratamento farmacológico , Anticorpos Monoclonais Humanizados/uso terapêutico , Masculino , Adolescente , Feminino , Anticorpos Monoclonais/uso terapêutico , Fármacos Dermatológicos/uso terapêutico , Qualidade de Vida , Adulto
16.
Int J Biol Macromol ; 271(Pt 2): 132536, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38777021

RESUMO

The enhancement of antimicrobial wound dressings is of utmost importance in light of the escalating risk of antibiotic resistance caused by excessive antibiotic usage. Conventional antimicrobial materials eradicate pathogenic bacteria while impeding the proliferation of beneficial bacteria during the management of wound infections, thereby disturbing the equilibrium of the skin micro-ecosystem and engendering recurrent cutaneous complications. Lactobacillus rhamnosus (L.rha) is a probiotic that can inhibit the growth of certain pathogenic bacteria by secreting a large number of metabolites. In this paper, we synthesized a cross-linker (SPBA) with a boric acid molecule from succinic acid and 4-(bromomethyl)phenylboronic acid, which formed a boric acid ester bond with a diol on the natural polysaccharide sodium alginate (SA), and obtained a pH/reactive oxygen species (ROS) dual-responsive hydrogel (SA-SPBA) for loading L.rha to treat wound infections. The SA-SPBA@L.rha hydrogel improves the survival of L.rha during storage and has good injectability as well as self-healing properties. The hydrogel showed good biocompatibility, the antimicrobial effect increases in a dose-dependent manner, and it has a certain antioxidant and anti-inflammatory capacity, accelerating wound repair. The use of SA-SPBA@L.rha hydrogel provides a safe and effective strategy for the repair of skin wound infections.


Assuntos
Alginatos , Antibacterianos , Hidrogéis , Espécies Reativas de Oxigênio , Infecção dos Ferimentos , Alginatos/química , Hidrogéis/química , Hidrogéis/farmacologia , Espécies Reativas de Oxigênio/metabolismo , Concentração de Íons de Hidrogênio , Animais , Infecção dos Ferimentos/tratamento farmacológico , Infecção dos Ferimentos/microbiologia , Camundongos , Antibacterianos/farmacologia , Antibacterianos/química , Lacticaseibacillus rhamnosus/química , Cicatrização/efeitos dos fármacos , Humanos , Antioxidantes/farmacologia , Antioxidantes/química
17.
Int J Biol Macromol ; 270(Pt 1): 132028, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38704066

RESUMO

Clinical therapy for widespread infections caused by Streptococcus pneumoniae (S. pneumoniae), such as community-acquired pneumonia, is highly challenging. As an important bacterial toxin, hydrogen peroxide (H2O2) secreted by S. pneumoniae can suppress the host's immune system and cause more severe disease. To address this problem, a hyaluronic acid (HA)-coated inorganic catalase-driven Janus nanomotor was developed, which can cleverly utilize and decompose H2O2 to reduce the burden of bacterial infection, and have excellent drug loading capacity. HA coating prevents rapid leakage of loaded antibiotics and improves the biocompatibility of the nanomaterials. The Janus nanomotor converted H2O2 into oxygen (O2), gave itself the capacity to move actively, and encouraged widespread dispersion in the lesion site. Encouragingly, animal experiments demonstrated that the capability of the nanomotors to degrade H2O2 contributes to diminishing the proliferation of S. pneumoniae and lung tissue damage. This self-propelled drug delivery platform provides a new therapeutic strategy for infections with toxin-secreting bacteria.


Assuntos
Catalase , Ácido Hialurônico , Peróxido de Hidrogênio , Streptococcus pneumoniae , Ácido Hialurônico/química , Catalase/metabolismo , Catalase/química , Streptococcus pneumoniae/efeitos dos fármacos , Animais , Peróxido de Hidrogênio/química , Peróxido de Hidrogênio/metabolismo , Antibacterianos/farmacologia , Antibacterianos/química , Camundongos , Nanoestruturas/química , Humanos , Pneumonia/tratamento farmacológico
18.
J Cell Mol Med ; 28(10): e18268, 2024 May.
Artigo em Inglês | MEDLINE | ID: mdl-38775031

RESUMO

Colorectal cancer (CRC) is a highly prevalent malignancy affecting the digestive system on a global scale. This study aimed to explore the previously unexplored role of CHPF in the progression of CRC. Our results revealed a significant upregulation of CHPF expression in CRC tumour tissues compared to normal tissues, with its levels correlating with tumour malignancy. In vitro experiments using CRC cell lines demonstrated that inhibiting CHPF expression suppressed cell proliferation, colony formation and cell migration, while promoting apoptosis. Conversely, overexpressing CHPF had the opposite effect. Additionally, our xenograft models in mice confirmed the inhibitory impact of CHPF knockdown on CRC progression using various cell models. Mechanistic investigations unveiled that CHPF may enhance VEGFB expression through E2F1-mediated transcription. Functionally, suppressing VEGFB expression successfully mitigated the oncogenic effects induced by CHPF overexpression. Collectively, these findings suggest that CHPF may act as a tumour promoter in CRC, operating in a VEGFB-dependent manner and could be a potential target for therapeutic interventions in CRC treatment.


Assuntos
Apoptose , Movimento Celular , Proliferação de Células , Neoplasias Colorretais , Progressão da Doença , Regulação Neoplásica da Expressão Gênica , Fator B de Crescimento do Endotélio Vascular , Idoso , Animais , Feminino , Humanos , Masculino , Camundongos , Apoptose/genética , Linhagem Celular Tumoral , Movimento Celular/genética , Proliferação de Células/genética , Neoplasias Colorretais/genética , Neoplasias Colorretais/patologia , Neoplasias Colorretais/metabolismo , Camundongos Nus , Transcrição Gênica , Fator B de Crescimento do Endotélio Vascular/metabolismo , Fator B de Crescimento do Endotélio Vascular/genética
19.
Discov Oncol ; 15(1): 122, 2024 Apr 16.
Artigo em Inglês | MEDLINE | ID: mdl-38625419

RESUMO

PURPOSE: The Gleason score (GS) and positive needles are crucial aggressive indicators of prostate cancer (PCa). This study aimed to investigate the usefulness of magnetic resonance imaging (MRI) radiomics models in predicting GS and positive needles of systematic biopsy in PCa. MATERIAL AND METHODS: A total of 218 patients with pathologically proven PCa were retrospectively recruited from 2 centers. Small-field-of-view high-resolution T2-weighted imaging and post-contrast delayed sequences were selected to extract radiomics features. Then, analysis of variance and recursive feature elimination were applied to remove redundant features. Radiomics models for predicting GS and positive needles were constructed based on MRI and various classifiers, including support vector machine, linear discriminant analysis, logistic regression (LR), and LR using the least absolute shrinkage and selection operator. The models were evaluated with the area under the curve (AUC) of the receiver-operating characteristic. RESULTS: The 11 features were chosen as the primary feature subset for the GS prediction, whereas the 5 features were chosen for positive needle prediction. LR was chosen as classifier to construct the radiomics models. For GS prediction, the AUC of the radiomics models was 0.811, 0.814, and 0.717 in the training, internal validation, and external validation sets, respectively. For positive needle prediction, the AUC was 0.806, 0.811, and 0.791 in the training, internal validation, and external validation sets, respectively. CONCLUSIONS: MRI radiomics models are suitable for predicting GS and positive needles of systematic biopsy in PCa. The models can be used to identify aggressive PCa using a noninvasive, repeatable, and accurate diagnostic method.

20.
J Chem Neuroanat ; 138: 102424, 2024 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-38670441

RESUMO

Neuroinflammation associated with microglial activation plays a role in the development of Parkinson's disease (PD). The upregulation of interferon regulatory factor 8 (IRF8) in microglia following peripheral nerve injury has been observed to induce microglial activation. This suggests the potential therapeutic significance of IRF8 in PD. This research aims to explore the effects of IRF8 on the 1-methyl-4-phenyl-1,2,3,6-tetrahydropyridine (MPTP)-induced PD mouse model and lipopolysaccharide (LPS)-induced neuroinflammation, along with its underlying mechanisms. The study examines the differential expression of IRF8 and its effects on neuropathological changes using a PD mouse model and a PD model established from BV2 cells in vitro. IRF8 was found to be prominently expressed in the substantia nigra pars compacta (SNpc) region of PD mice and LPS-stimulated BV2 cells, while the expression of tyrosine hydroxylase (TH) and dopamine (DA) content in the SNpc region of PD mice was notably reduced. MPTP treatment and LPS stimulation intensified microglial activation, inflammation, and activation of the AMPK/mTOR signaling pathway in vivo and in vitro, respectively. Upon IRF8 silencing in the PD mouse and cell models, the knockdown of IRF8 ameliorated MPTP-induced behavioral deficits, increased the counts of TH and Nissl-positive neurons and DA content, reduced the number of Iba-1-positive microglia, and reduced the content of inflammatory factors, possibly by inhibiting the AMPK/mTOR signaling pathway. Similar outcomes were observed in the PD cell model. In conclusion, the suppression of IRF8 alleviates neuroinflammation through regulating microglial activation in PD models in vivo and in vitro by the AMPK/mTOR signaling pathway.


Assuntos
Fatores Reguladores de Interferon , Camundongos Endogâmicos C57BL , Microglia , Doenças Neuroinflamatórias , Doença de Parkinson , Animais , Microglia/metabolismo , Camundongos , Fatores Reguladores de Interferon/metabolismo , Fatores Reguladores de Interferon/genética , Masculino , Doenças Neuroinflamatórias/metabolismo , Doença de Parkinson/metabolismo , Doença de Parkinson/patologia , Lipopolissacarídeos , Serina-Treonina Quinases TOR/metabolismo , Técnicas de Silenciamento de Genes , Transdução de Sinais/fisiologia , Parte Compacta da Substância Negra/metabolismo , Parte Compacta da Substância Negra/patologia , 1-Metil-4-Fenil-1,2,3,6-Tetra-Hidropiridina/farmacologia
SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA