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1.
Sci Total Environ ; 954: 176405, 2024 Sep 19.
Artículo en Inglés | MEDLINE | ID: mdl-39304163

RESUMEN

Microplastics (MPs) contamination in marine environment has been an emerging issue worldwide, notably due to the potential ecological risks of MPs with co-existing environmental contaminants and released toxic plastic additives. To verify the co-occurrence characteristics of MPs and co-existing pollutants in the benthic boundary layer (BBL), the distribution characteristics of MPs, and selected heavy metals (HMs) and halogenated flame retardants (Polybrominated diphenyl ethers, PBDEs, and Dechlorane Plus) in the bottom water and sediment were comprehensively investigated in the East China Sea (ECS). The sampling sites were selected along the coast of ECS, where might be significantly affected by terrigenous inputs and anthropogenic sources. MPs were abundant in the bottom water (62.8-480.2 items/L) and sediment (80.1-1346.7 items/kg d.w.) with polyester, polyethylene, and polypropylene being as the most abundant types and characterized as fiber/line, particle size 200-500 µm, and transparent/white. The abundance and characteristics of MPs demonstrated strong correlations within the bottom water and sediment, which might be due to the frequent exchange of materials. In addition, the abundance of MPs was significantly positively correlated with HMs (Cd, Cr, Pb) in the bottom water and PBDEs in sediment, respectively. According to the scanning electron microscopy/energy dispersive X-ray spectrometry analysis, MPs might act as carriers to transport and co-sediment the co-existing pollutants in water, and physically adsorb or chemically bind with pollutants in sediment. These results could help to elucidate the sources, migration, and fate, and verify the occurrence and potential risks of MPs and their co-existing pollutants in BBL, thus realize the management and control of MPs contamination in marine.

2.
iScience ; 27(9): 110757, 2024 Sep 20.
Artículo en Inglés | MEDLINE | ID: mdl-39280623

RESUMEN

Tumor necrosis factor receptor-associated factor 6 (TRAF6) is crucial in flavivirus infections, modulating the host immune response through interactions with viral proteins. Despite its importance, the relationship between TRAF6 and Zika virus (ZIKV) remains poorly understood. Our prior proteomics analysis revealed reduced TRAF6 protein levels in ZIKV-infected human trophoblast cells compared to non-infected controls. Subsequent studies in cell models and murine tissues confirmed a significant reduction in both TRAF6 mRNA and protein levels post-ZIKV infection. Further investigations unveiled that ZIKV induces P62-mediated degradation of TRAF6, with NS1 identified as the primary contributor. Co-localization and interaction studies demonstrated that NS1 promotes the association of P62, a key autophagy mediator, with TRAF6. Notably, our findings revealed TRAF6 enhances ZIKV infection, NS1 ubiquitination, NS1 expression, and the production of inflammatory cytokines and chemokines. These insights highlight the intricate TRAF6-ZIKV relationship, offering potential for drug targeting NS1-TRAF6 interactions to manage ZIKV infections effectively.

3.
Int J Pharm ; 665: 124655, 2024 Sep 05.
Artículo en Inglés | MEDLINE | ID: mdl-39244072

RESUMEN

The efficient elimination of bacteria within the dentinal tubules has been hindered by the poor deposition and short residence of disinfecting agents. Meanwhile, the current irrigant (e.g., NaClO, 5.25 %) shows severe adverse effects on the surrounding soft tissues because of its inherent high irritancy. To address this issue, this work reports an in situ generated sonosensitizer to handle the biofilm in dentinal tubules with minimal adverse effects. The production of nanoscale sonosensitizer involves the concurrent delivery of H2O2 (0.01 %), ferrocene derivative (Fc), and indocyanine green (ICG). With ultrasound treatment, the reaction between H2O2 and Fc liberated Fe3+ that was further complexed with ICG to generate the nanoscale sonosensitizer in situ, followed by singlet oxygen production for potent disinfecting action. Because the above cascade reactions occur within the confined dentinal tubules, the generated ICG-Fe3+ nanosensitizer would show prolonged retention therein. The anti-bacterial potency of nanosensitizer was demonstrated in petrodish and ex vivo biofilm models. Meanwhile, the transmission electron microscope imaging of biofilm and cytotoxicity assay in L929 fibroblast cells proved the superiority of nanosensitizer against NaClO regarding adverse effects. The current work opens new avenues of biofilm elimination in dentinal tubules, showing a high translation potential.

4.
Sci Total Environ ; 950: 175262, 2024 Nov 10.
Artículo en Inglés | MEDLINE | ID: mdl-39098428

RESUMEN

The utilization of nitenpyram for aphid and whitefly control may induce environmental contamination and negative repercussions on non-target organisms. Formerly, we found that nitenpyram would pollute the peripheral and sub-peripheral areas of the adjacent mulberry orchard. Under acute toxicity conditions, nitenpyram induced oxidative damage in silkworms, affected biological metabolism, synthesis, immunity, and signal transduction. Considering the impact of nitenpyram mist drift on mulberry leaves, we investigated the effects of low concentrations of nitenpyram on silkworms. The results showed that silkworms exposed to 0.17 mg/L, 0.35 mg/L and 0.70 mg/L of nitenpyram (1/40 LC50, 1/20 LC50 and 1/10 LC50) showed obvious poisoning symptoms. The cocoon weight and cocoon shell weight decreased gradually with increases in the concentration, and these decreases prolonged the growth and development time of silkworms and induced the detoxification enzymes carboxylesterase (CarE) and glutathione-S-transferase (GST) to cope with the stress damage caused by nitenpyram. Exposure to low concentrations of nitenpyram downregulates genes involved in the drug metabolism-other enzymes and peroxisome pathway in silkworms. Additionally, through injection of miRNA mimics and inhibitors, we discovered that detoxifying enzyme pathway genes are influenced by bmo-miR-3382-3P, bmo-miR-3213-5P and bmo-miR-133, regulating the immune response of silkworms. This study provides an overall view of the toxicity and detoxification metabolism of nitenpyram in silkworm, and provides a reference for environmental assessment.


Asunto(s)
Bombyx , Neonicotinoides , Animales , Bombyx/efectos de los fármacos , Neonicotinoides/toxicidad , Insecticidas/toxicidad , Larva/efectos de los fármacos , Glutatión Transferasa/metabolismo , Glutatión Transferasa/genética
5.
Int Immunopharmacol ; 141: 112918, 2024 Nov 15.
Artículo en Inglés | MEDLINE | ID: mdl-39159558

RESUMEN

Inflammatory pain is a chronic pain caused by peripheral tissue inflammation, seriously impacting the patient's life quality. Cinobufacini injection, as a traditional Chinese medicine injection preparation, shows excellent efficacy in anti-inflammatory and analgesic treatment in patients with advanced tumors. In this study, a novel analgesic peptide CI5 with anti-inflammatory and analgesic bio-functions that naturally presents in Cinobufacini injection and its regulatory mechanism are reported. Our results showed that the administration of CI5 significantly relieved the pain of mice in the acetic acid twisting analgesic model and formalin inflammatory pain model. Furthermore, CI5 effectively reduced the inflammatory cytokines (IL-6, TNF-α and IL-1ß) and inflammatory mediator (PGE2) expressions, and prevented the carrageenan-induced paw edema in mice. Further LC-MS/MS results showed the anti-inflammatory and analgesic bio-functions of CI5 depended on its interaction with the Rac-2 protein upstream of ERK1/2 and the inflammatory signaling pathway (ERK1/2/COX-2 axis). In summary, CI5, as a novel natural candidate identified from Cinobufacini injection, showed substantial clinical promise for inflammatory pain treatments.


Asunto(s)
Analgésicos , Antiinflamatorios , Ciclooxigenasa 2 , Edema , Inflamación , Dolor , Animales , Analgésicos/uso terapéutico , Analgésicos/farmacología , Analgésicos/administración & dosificación , Ratones , Dolor/tratamiento farmacológico , Masculino , Inflamación/tratamiento farmacológico , Antiinflamatorios/uso terapéutico , Antiinflamatorios/farmacología , Ciclooxigenasa 2/metabolismo , Edema/tratamiento farmacológico , Edema/inducido químicamente , Venenos de Anfibios/uso terapéutico , Venenos de Anfibios/farmacología , Sistema de Señalización de MAP Quinasas/efectos de los fármacos , Citocinas/metabolismo , Péptidos/uso terapéutico , Péptidos/farmacología , Péptidos/administración & dosificación , Humanos , Modelos Animales de Enfermedad , Carragenina , Mediadores de Inflamación/metabolismo , Dinoprostona/metabolismo
6.
BMC Microbiol ; 24(1): 288, 2024 Aug 02.
Artículo en Inglés | MEDLINE | ID: mdl-39095694

RESUMEN

BACKGROUND: Coral diseases are significant drivers of global coral reef degradation, with pathogens dominated by Vibrio coralliilyticus playing a prominent role in the development of coral diseases. Coral phenotype, symbiotic microbial communities, and host transcriptional regulation have been well-established as factors involved in determining coral disease resistance, but the underlying mechanisms remain incompletely understood. METHODS: This study employs high-throughput sequencing to analyse the symbiotic microbial and transcriptional response of the hosts in order to evaluate the disease resistance of Acropora valida and Turbinaria peltata exposed to Vibrio coralliilyticus. RESULTS: A. valida exhibited pronounced bleaching and tissue loss within 7 h of pathogen infection, whereas T. peltata showed no signs of disease throughout the experiment. Microbial diversity analyses revealed that T. peltata had a more flexible microbial community and a higher relative abundance of potential beneficial bacteria compared to A. valida. Although Vibrio inoculation resulted in a more significant decrease in the Symbiodiniaceae density of A. valida compared to that of T. peltata, it did not lead to recombination of the coral host and Symbiodiniaceae in either coral species. RNA-seq analysis revealed that the interspecific differences in the transcriptional regulation of hosts after Vibrio inoculation. Differentially expressed genes in A. valida were mainly enriched in the pathways associated with energy supply and immune response, such as G protein-coupled receptor signaling, toll-like receptor signaling, regulation of TOR signaling, while these genes in T. peltata were mainly involved in the pathway related to immune homeostasis and ion transport, such as JAK-STAT signaling pathway and regulation of ion transport. CONCLUSIONS: Pathogenic challenges elicit different microbial and transcriptional shifts across coral species. This study offers novel insights into molecular mechanisms of coral resistance to disease.


Asunto(s)
Antozoos , Resistencia a la Enfermedad , Vibrio , Antozoos/microbiología , Antozoos/genética , Antozoos/inmunología , Animales , Vibrio/genética , Resistencia a la Enfermedad/genética , Simbiosis/genética , Microbiota/genética , Arrecifes de Coral , Secuenciación de Nucleótidos de Alto Rendimiento
7.
Proc Natl Acad Sci U S A ; 121(36): e2409955121, 2024 Sep 03.
Artículo en Inglés | MEDLINE | ID: mdl-39190351

RESUMEN

Facing complex and variable emerging antibiotic pollutants, the traditional development of functional materials is a "trial-and-error" process based on physicochemical principles, where laborious steps and long timescales make it difficult to accelerate technical breakthroughs. Notably, natural biomolecular coronas derived from highly tolerant organisms under significant contamination scenarios can be used in conjunction with nanotechnology to tackling emerging contaminants of concern. Here, super worms (Tubifex tubifex) with high pollutant tolerance were integrated with nano-zero valent iron (nZVI) to effectively reduce the content of 17 antibiotics in wastewater within 7 d. Inspired by the synergistic remediation, nZVI-augmented worms were constructed as biological nanocomposites. Neither nZVI (0.3 to 3 g/L) nor worms (104 to 105 per liter) alone efficiently degraded florfenicol (FF, as a representative antibiotic), while their composite removed 87% of FF (3 µmol/L). Under antibiotic exposure, biomolecules secreted by worms formed a corona on and modified the nZVI particle surface, enabling the nano-bio interface greater functionality, including responsiveness, enrichment, and reduction. Mechanistically, FF exposure activated glucose-alanine cycle pathways that synthesize organic acids and amines as major metabolites, which were assembled into vesicles and secreted, thereby interacting with nZVI in a biologically response design strategy. Lactic acid and urea formed hydrogen bonds with FF, enriched analyte presence at the heterogeneous interface. Succinic and lactic acids corroded the nZVI passivation layer and promoted electron transfer through surface conjugation. This unique strategy highlights biomolecular coronas as a complex resource to augment nano-enabled technologies and will provide shortcuts for rational manipulation of nanomaterial surfaces with coordinated multifunctionalities.


Asunto(s)
Antibacterianos , Hierro , Antibacterianos/química , Antibacterianos/farmacología , Animales , Hierro/química , Hierro/metabolismo , Corona de Proteínas/química , Corona de Proteínas/metabolismo , Contaminantes Químicos del Agua/química , Contaminantes Químicos del Agua/metabolismo , Oligoquetos/metabolismo , Biodegradación Ambiental , Restauración y Remediación Ambiental/métodos , Nanocompuestos/química
9.
BMC Psychol ; 12(1): 377, 2024 Jul 04.
Artículo en Inglés | MEDLINE | ID: mdl-38965591

RESUMEN

BACKGROUND: Group-based situations are common settings for cyberbullying, making bystander responses crucial in combating this issue. This study investigated how adolescent bystanders respond to various victims, including family members, friends, teachers, and celebrities. This study also examined how different parenting styles influenced children's cyber bystander involvement. METHODS: This study employed data from a cross-sectional school survey covering 1,716 adolescents aged 13-18 years from public and vocational schools in China collected in 2022. Logistic regression analyses were conducted to measure demographic characteristics, cyberbullying experiences, and parental rearing behaviors in predicting bystander reactions. RESULTS: The findings showed that middle school students preferred to "ask for help" while high school students tended to choose "call the police" when witnessing cyberbullying incidents. Bystanders growing up with parental rejection and overprotection, having previous cyberbullying victimization experiences, where the victims were disliked by them, exhibited fewer defensive reactions. CONCLUSIONS: This study has implications for future research and practices involving parental involvement in cyber bystander interventions, which could provide implications for future practice in designing specific intervention programs for cyberbullying bystander behavior. Future research and interventions against cyberbullying may provide individualized training including parents' positive parenting skills and parent-child interactions.


Asunto(s)
Conducta del Adolescente , Víctimas de Crimen , Ciberacoso , Relaciones Padres-Hijo , Responsabilidad Parental , Humanos , Adolescente , Ciberacoso/psicología , Masculino , Femenino , Responsabilidad Parental/psicología , Estudios Transversales , Víctimas de Crimen/psicología , Conducta del Adolescente/psicología , China , Estudiantes/psicología , Estudiantes/estadística & datos numéricos
10.
J Histotechnol ; : 1-12, 2024 Jul 18.
Artículo en Inglés | MEDLINE | ID: mdl-39022820

RESUMEN

Stabilized hyaluronic acid (HA), produced through diverse cross-linking technology and formulated as an injectable gel, has found widespread utilization in aesthetic industry. Cross-linked HA essentially constitutes a gel particle composition formed by numerous viscoelastic particulates. Various product formulations yield HA gels with distinct properties, including particle size, viscoelasticity, and interaction forces between particles. While previous studies have primarily concentrated on the biological safety and macroscopic expression of fillers, limited research exists on the internal mechanisms governing their macro-performance. This study selected three common dermal fillers for analysis, establishing an animal model to assess their in vivo interaction with surrounding tissues and explore their internal mechanisms. The findings revealed that particle size plays a crucial role in tissue integration.

12.
Parasit Vectors ; 17(1): 322, 2024 Jul 30.
Artículo en Inglés | MEDLINE | ID: mdl-39080770

RESUMEN

BACKGROUND: Toxoplasma gondii is an opportunistic pathogenic protozoan that infects all warm-blooded animals, including humans, and causes zoonotic toxoplasmosis. The bradyzoite antigen 1 (BAG1), known as heat-shock protein (HSP)30, is a specific antigen expressed during the early stage of T. gondii tachyzoite-bradyzoite conversion. METHODS: A bag1 gene knockout strain based on the T. gondii type II ME49 was constructed and designated as ME49Δbag1. The invasion, proliferation, and cyst formation efficiency in the cell model and survival in the mouse model were compared between the ME49 and ME49Δbag1 strains after infection. Quantitative polymerase chain reaction (qPCR) was used to detect the transcriptional level of important genes, and western-blot was used to detect protein levels. RESULTS: ME49Δbag1 displayed significantly inhibited cyst formation, although it was not completely blocked. During early differentiation induced by alkaline and starvation conditions in vitro, the proliferation of ME49Δbag1 was significantly accelerated relative to the ME49 strain. Meanwhile, the transcription of the HSP family and bradyzoite formation deficient 1 (bfd1) were significantly enhanced. The observed upregulation suggests a compensatory mechanism to counterbalance the impaired stress responses of T. gondii following bag1 knockout. On the other hand, the elevated transcription levels of several HSP family members, including HSP20, HSP21, HSP40, HSP60, HSP70, and HSP90, along with BFD1, implied the involvement of alternative regulatory factors in bradyzoite differentiation aside from BAG1. CONCLUSIONS: The data suggested that when bag1 was absent, the stress response of T. gondii was partially compensated by increased levels of other HSPs, resulting in the formation of fewer cysts. This highlighted a complex regulatory network beyond BAG1 influencing the parasite's transformation into bradyzoites, emphasizing the vital compensatory function of HSPs in the T. gondii life cycle adaptation.


Asunto(s)
Proteínas de Choque Térmico , Proteínas Protozoarias , Toxoplasma , Toxoplasma/genética , Toxoplasma/metabolismo , Animales , Ratones , Proteínas Protozoarias/genética , Proteínas Protozoarias/metabolismo , Proteínas de Choque Térmico/genética , Proteínas de Choque Térmico/metabolismo , Técnicas de Inactivación de Genes , Toxoplasmosis Animal/parasitología , Femenino , Humanos , Proteínas de Unión al ADN , Factores de Transcripción
13.
Biol Sex Differ ; 15(1): 60, 2024 Jul 30.
Artículo en Inglés | MEDLINE | ID: mdl-39080808

RESUMEN

BACKGROUND: Cyp19a1a is a key enzyme in the pathway that converts androgens into estrogen and is regulated by TGF-ß signaling. Smad4 and FoxH1 are downstream effectors of TGF-ß signaling and may play important roles in ovarian development in M. albus. METHODS: We investigated the expression pattern of the Smad4 and FoxH1 using qRT‒PCR and immunofluorescence, then tested the changes of smad4 and foxh1 by qRT‒PCR after ovary incubation with FSH in vitro, and analysed the regulation of cyp19a1a transcription by Smad4 and FoxH1 by dual-luciferase reporter assays. RESULTS: We found that Smad4 encoded a putative protein of 449 amino acids and harbored the three conserved domains typical of this protein family. Smad4 and foxh1 exhibited similar expression patterns during ovarian development and after FSH incubation, with Pearson's coefficients of 0.873 and 0.63-0.81, respectively. Furthermore, Smad4, FoxH1 and Cyp19a1a colocalized in the granulosa cells and theca cells of ovaries during the mid-to-late vitellogenic stage. Smad4 repressed cyp19a1a activity via SBE1 (- 1372/-1364) and SBE2 (- 415/-407) in the cyp19a1a promoter, whereas mutating SBE1 or SBE2 restored cyp19a1a promoter activity. Co-overexpression of Smad4 and FoxH1 significantly reduced cyp19a1a promoter activity. CONCLUSIONS: This study provides new insights into the potential functions of transcription factors Smad4 and FoxH1 in ovarian development and the transcriptional regulation mechanism of cyp19a1a in M. albus, which will reveal Smad4/FoxH1-mediated TGF-ß signaling in reproduction and the regulation of the cyp19a1a. Aromatase, encoded by cyp19a1a, is involved in ovarian development and plays an important role in the quality of eggs, as well the sex ratio, of the teleost fish, M. albus. The research on the transcriptional regulation of cyp19a1a has contributed to the understanding of its role in ovarian development. In previous study, it was shown that FoxH1 inhibits cyp19a1a transcription. In the present study, Smad4 was confirmed as a cyp19a1a transcriptional repressor and Smad4 may also coordinate with FoxH1 to repress cyp19a1a transcription. At present, we provide a new perspective for the transcriptional regulation of cyp19a1a by transcription factors Smad4 and FoxH1 in teleost fish ovary. In the future, the regulatory networks of Smad4 and FoxH1 will be further studied and the gene editing technology will be applied to screen specific regulatory factors of cyp191a1a gene, so as to alter the female cycle and modulate the sex ratio of the eggs production.


Asunto(s)
Aromatasa , Anguilas , Factores de Transcripción Forkhead , Ovario , Regiones Promotoras Genéticas , Proteína Smad4 , Animales , Femenino , Ovario/metabolismo , Aromatasa/metabolismo , Aromatasa/genética , Proteína Smad4/metabolismo , Proteína Smad4/genética , Factores de Transcripción Forkhead/metabolismo , Factores de Transcripción Forkhead/genética , Anguilas/metabolismo , Proteínas de Peces/metabolismo , Proteínas de Peces/genética , Hormona Folículo Estimulante/metabolismo
14.
PLoS Pathog ; 20(7): e1012408, 2024 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-39038037

RESUMEN

c-FLIP functions as a dual regulator of apoptosis and inflammation, yet its implications in Zika virus (ZIKV) infection remain partially understood, especially in the context of ZIKV-induced congenital Zika syndrome (CZS) where both apoptosis and inflammation play pivotal roles. Our findings demonstrate that c-FLIP promotes ZIKV infection in placental cells and myeloid-derived macrophages, involving inflammation and caspase-8/3-mediated apoptosis. Moreover, our observations reveal that c-FLIP augments ZIKV infection in multiple tissues, including blood cell, spleen, uterus, testis, and the brain of mice. Notably, the partial deficiency of c-FLIP provides protection to embryos against ZIKV-induced CZS, accompanied by a reduction in caspase-3-mediated apoptosis. Additionally, we have found a distinctive parental effect of c-FLIP influencing ZIKV replication in fetal heads. In summary, our study reveals the critical role of c-FLIP as a positive regulator in caspase-8/3-mediated apoptosis during ZIKV infection, significantly contributing to the development of CZS.


Asunto(s)
Apoptosis , Proteína Reguladora de Apoptosis Similar a CASP8 y FADD , Caspasa 3 , Caspasa 8 , Infección por el Virus Zika , Virus Zika , Infección por el Virus Zika/virología , Infección por el Virus Zika/metabolismo , Infección por el Virus Zika/patología , Proteína Reguladora de Apoptosis Similar a CASP8 y FADD/metabolismo , Animales , Ratones , Caspasa 8/metabolismo , Femenino , Humanos , Caspasa 3/metabolismo , Embarazo , Placenta/virología , Placenta/metabolismo , Placenta/patología , Ratones Endogámicos C57BL , Replicación Viral , Ratones Noqueados
15.
Front Public Health ; 12: 1336617, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38827606

RESUMEN

Introduction: Adolescents are experiencing an unprecedented cyber-saturated environment where the disclosure of private information should be approached with caution. This study aims to investigate the effects of school environment, including student support, teacher support, and opportunities for autonomy, on students' disclosure of private information and their experiences with cyberbullying. Methods: In September 2022, a total of 1,716 students (mean age = 14.60, SD = 1.35) from three regular and vocational schools in China participated in the survey. Results: The results showed that 35.6% of the participants had experienced victimization by cyberbullying, and 12.6% had perpetrated cyberbullying. Vocational school students reported significantly higher rates of cyberbullying and lower levels of perceived school climate than students from regular school. Student support in the school environment was found to negatively affect both cyberbullying perpetration and victimization, with this impact appearing to be stronger in regular schools as compared to vocational schools. Opportunities for autonomy and the disclosure of private information were positively correlated with experiences of cyberbullying. Discussion: This study introduces a novel perspective that perceived school climate influences adolescents' disclosure of private information and their involvement in cyberbullying. The findings could provide implications for future research and practices aimed at child protection in cyberspace.


Asunto(s)
Ciberacoso , Instituciones Académicas , Estudiantes , Humanos , China , Adolescente , Masculino , Femenino , Ciberacoso/psicología , Ciberacoso/estadística & datos numéricos , Estudiantes/psicología , Estudiantes/estadística & datos numéricos , Encuestas y Cuestionarios , Revelación , Víctimas de Crimen/estadística & datos numéricos , Víctimas de Crimen/psicología
16.
Front Psychol ; 15: 1374071, 2024.
Artículo en Inglés | MEDLINE | ID: mdl-38840750

RESUMEN

Introduction: The role of bystanders in cyberbullying situations is critical, with the potential to significantly influence outcomes. Bystanders who demonstrate positive behaviors-such as reporting incidents or supporting victims-can help to mitigate the damaging effects of cyberbullying. Based on the Social Cognitive Theory, this study seeks to address the psychosocial mechanisms that underlie positive cyber-bystander behaviors. Methods: A total of 1,716 students in Grades 8-12 from three secondary schools in China participated in this study. Path analysis was utilized to delineate the relationships between internet self-efficacy, empathy, teacher and parental support, and cyber-bystander behaviors. Results: Adolescents who received greater support from teachers were more likely to demonstrate increased internet self-efficacy and empathy. In contrast, higher levels of parental warmth were associated with lower levels of internet self-efficacy. Teacher support and parental warmth exerted an indirect effect on positive bystander behaviors through empathy. Discussion: The importance of parental warmth paired with Internet self-efficacy in preventing online interpersonal violence and motivate active bystander behaviors is considerable. We recommend adopting a nuanced approach that differentiates between empathy and internet self-efficacy in cyber-bystander research.

17.
BMC Genomics ; 25(1): 500, 2024 May 21.
Artículo en Inglés | MEDLINE | ID: mdl-38773374

RESUMEN

BACKGROUND: The ricefield eel Monopterus albus undergoes a natural sex change from female to male during its life cycle, and previous studies have shown the potential mechanisms of this transition at the transcriptional and protein levels. However, the changes in protein levels have not been fully explored, especially in the intersexual stage. RESULTS: In the present study, the protein expression patterns in the gonadal tissues from five different periods, the ovary (OV), early intersexual stage gonad (IE), middle intersexual stage gonad (IM), late intersexual stage gonad (IL), and testis (TE), were determined by untargeted proteomics sequencing. A total of 5125 proteins and 394 differentially expressed proteins (DEPs) were detected in the gonadal tissues. Of the 394 DEPs, there were 136 between the OV and IE groups, 20 between the IM and IE groups, 179 between the IL and IM groups, and 59 between the TE and IL groups. Three candidate proteins, insulin-like growth factor 2 mRNA-binding protein 3 isoform X1 (Igf2bp3), triosephosphate isomerase (Tpi), and Cu-Zn superoxide dismutase isoform X1 [(Cu-Zn) Sod1], were validated by western blotting to verify the reliability of the data. Furthermore, metal metabolite-related proteins were enriched in the IL vs. IM groups and TE vs. IL groups, which had close relationships with sex change, including Cu2+-, Ca2+-, Zn2+- and Fe2+/Fe3+-related proteins. Analysis of the combined transcriptome data revealed consistent protein/mRNA expression trends for two metal metabolite-related proteins/genes [LOC109953912 and calcium Binding Protein 39 Like (cab39l)]. Notably, we detected significantly higher levels of Cu2+ during the sex change process, suggesting that Cu2+ is a male-related metal metabolite that may have an important function in male reproductive development. CONCLUSIONS: In summary, we analyzed the protein profiles of ricefield eel gonadal tissues in five sexual stages (OV, IE, IM, IL, and TE) and verified the plausibility of the data. After preforming the functional enrichment of metal metabolite-related DEPs, we detected the contents of the metal metabolites Zn2+, Cu2+, Ca2+, and Fe2+/Fe3+ at these five stages and screened for (Cu-Zn) Sod1 and Mmp-9 as possible key proteins in the sex reversal process.


Asunto(s)
Metales , Animales , Masculino , Femenino , Metales/metabolismo , Anguilas/metabolismo , Anguilas/genética , Proteómica , Proteínas de Peces/metabolismo , Proteínas de Peces/genética , Smegmamorpha/metabolismo , Smegmamorpha/genética , Organismos Hermafroditas/metabolismo , Organismos Hermafroditas/genética , Perfilación de la Expresión Génica , Testículo/metabolismo
18.
Eat Weight Disord ; 29(1): 37, 2024 May 14.
Artículo en Inglés | MEDLINE | ID: mdl-38743203

RESUMEN

BACKGROUND: Amidst growing evidence of the intricate link between physical and mental health, this study aims to dissect the relationship between the waist-to-weight index (WWI) and suicidal ideation within a representative sample of the US population, proposing WWI as a novel metric for suicide risk assessment. METHODS: The study engaged a sample of 9500 participants in a cross-sectional design. It employed multivariate logistic and linear regression analyses to probe the association between WWI and suicidal ideation. It further examined potential nonlinear dynamics using a weighted generalized additive model alongside stratified analyses to test the relationship's consistency across diverse demographic and health variables. RESULTS: Our analysis revealed a significant positive correlation between increased WWI and heightened suicidal ideation, characterized by a nonlinear relationship that persisted in the adjusted model. Subgroup analysis sustained the association's uniformity across varied population segments. CONCLUSIONS: The study elucidates WWI's effectiveness as a predictive tool for suicidal ideation, underscoring its relevance in mental health evaluations. By highlighting the predictive value of WWI, our findings advocate for the integration of body composition considerations into mental health risk assessments, thereby broadening the scope of suicide prevention strategies.


Asunto(s)
Peso Corporal , Encuestas Nutricionales , Ideación Suicida , Humanos , Femenino , Masculino , Adulto , Persona de Mediana Edad , Estudios Transversales , Adulto Joven , Circunferencia de la Cintura , Adolescente , Anciano , Índice de Masa Corporal , Factores de Riesgo , Medición de Riesgo , Estados Unidos/epidemiología
19.
Int J Biol Macromol ; 271(Pt 1): 132402, 2024 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-38754662

RESUMEN

In this paper, the effects of chitosan film containing star anise essential oil nanofiltration (CFSAO) and superchilled (SC) temperature on the changes of physicochemical and microbiological indexes of rabbit meat patties within 15 days of storage were studied. The total aerobic bacteria counts, malondialdehyde content, protein carbonyl content, total sulfhydryl content, and metmyoglobin content continued to grow throughout the entire experimental period, and the maximum absorption peak at the soret region of myoglobin gradually decreased. Along with the storage time extended, the brightness and redness of rabbit meat significantly decreased (P < 0.05), while the yellowness significantly increased (P < 0.05). The results of storage experiments showed that chitosan composite films and SC temperature had good inhibition on lipid oxidation, myoglobin oxidation and degradation, sulfhydryl content reduction, and microbial growth of rabbit meat after 15 days of storage, and could slow down the change of rabbit meat color.


Asunto(s)
Quitosano , Embalaje de Alimentos , Almacenamiento de Alimentos , Carne , Aceites Volátiles , Animales , Quitosano/química , Quitosano/farmacología , Conejos , Embalaje de Alimentos/métodos , Aceites Volátiles/química , Aceites Volátiles/farmacología , Carne/microbiología , Almacenamiento de Alimentos/métodos , Mioglobina/metabolismo , Mioglobina/química , Conservación de Alimentos/métodos , Calidad de los Alimentos
20.
BMC Psychol ; 12(1): 259, 2024 May 10.
Artículo en Inglés | MEDLINE | ID: mdl-38725028

RESUMEN

BACKGROUND: Although abundant evidence has confirmed cyberbullying as a global online risk, little is known about the coping strategies employed by victims and those who experiencing bullying. A validated scale for coping with cyberbullying could inform evidence-based social services and enable comparative studies of this phenomenon among victims from different backgrounds. This study aims to validate the Coping Strategies for Victims of Cyberbullying (CSVC) scale among Chinese adolescents and to compare its effectiveness between victims and bully-victims (individuals with dual roles). METHODS: A 25-item CSVC scale was translated and adapted for cultural relevance in the Chinese context. A sample of 1,716 adolescents, aged 13-18 years, from two middle schools and one high school in China, was recruited. Both exploratory factor analysis (EFA) and confirmatory factor analysis (CFA) were conducted. RESULTS: The EFA revealed that the Chinese version of the CSVC scale had satisfactory validity. The CFA demonstrated a good fit for the eight-factor model in assessing different coping strategies for cyberbullying. Differences in the selection of coping strategies were observed between the general adolescent population and sexual and gender minorities. CONCLUSIONS: Future intervention studies may use this validated scale to educate adolescents, both those affected by cyberbullying and those who are not, to learn a broader range of coping strategies and to choose more effective ones.


Asunto(s)
Habilidades de Afrontamiento , Víctimas de Crimen , Ciberacoso , Adolescente , Femenino , Humanos , Masculino , China , Víctimas de Crimen/psicología , Ciberacoso/psicología , Análisis Factorial , Psicometría/instrumentación , Reproducibilidad de los Resultados , Encuestas y Cuestionarios/normas
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