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1.
Genomics ; 116(2): 110792, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38215860

RESUMO

Eimeria tenella is the main pathogen responsible for coccidiosis in chickens. The life cycle of E. tenella is, arguably, the least complex of all Coccidia, with only one host. However, it presents different developmental stages, either in the environment or in the host and either intracellular or extracellular. Its signaling and metabolic pathways change with its different developmental stages. Until now, little is known about the developmental regulation and transformation mechanisms of its life cycle. In this study, protein profiles from the five developmental stages, including unsporulated oocysts (USO), partially sporulated (7 h) oocysts (SO7h), sporulated oocysts (SO), sporozoites (S) and second-generation merozoites (M2), were harvested using the label-free quantitative proteomics approach. Then the differentially expressed proteins (DEPs) for these stages were identified. A total of 314, 432, 689, and 665 DEPs were identified from the comparison of SO7h vs USO, SO vs SO7h, S vs SO, and M2 vs S, respectively. By conducting weighted gene coexpression network analysis (WGCNA), six modules were dissected. Proteins in blue and brown modules were calculated to be significantly positively correlated with the E. tenella developmental stages of sporozoites (S) and second-generation merozoites (M2), respectively. In addition, hub proteins with high intra-module degree were identified. Gene Ontology (GO) and Kyoto Encyclopedia of Gene and Genomes (KEGG) pathway enrichment analyses revealed that hub proteins in blue modules were involved in electron transport chain and oxidative phosphorylation. Hub proteins in the brown module were involved in RNA splicing. These findings provide new clues and ideas to enhance our fundamental understanding of the molecular mechanisms underlying parasite development.


Assuntos
Eimeria tenella , Animais , Eimeria tenella/genética , Proteômica , Galinhas/parasitologia , Oocistos/fisiologia , Esporozoítos/genética , Esporozoítos/metabolismo , Estágios do Ciclo de Vida
2.
Parasitol Res ; 123(3): 167, 2024 Mar 20.
Artigo em Inglês | MEDLINE | ID: mdl-38507102

RESUMO

The Eimeria tenella Yulin strain (EtYL), which is sensitive to most anti-coccidial drugs, was isolated in the Yulin area of Guangxi, China. Then, Eimeria tenella Yulin precocious line (pEtYL), a precocious line with a prepatent period of 108 h, was obtained through early selection. The biological characteristics of pEtYL, including its morphology, purity, oocyst excretion curve, reproductive capacity, pathogenicity, immunogenicity, and preservation time, were comprehensively analyzed. The results showed that the isolated precocious line of E. tenella exhibited high purity, relatively weak pathogenicity, and good immunogenicity and can be used as a live vaccine line for chicken coccidiosis.


Assuntos
Coccidiose , Eimeria tenella , Doenças das Aves Domésticas , Animais , China , Coccidiose/prevenção & controle , Oocistos , Virulência , Galinhas
3.
J Proteome Res ; 22(9): 2785-2802, 2023 09 01.
Artigo em Inglês | MEDLINE | ID: mdl-37562054

RESUMO

Proteome-wide lysine acetylation has been documented in apicomplexan parasite Toxoplasma gondii and Plasmodium falciparum. Here, we conducted the first lysine acetylome in unsporulated oocysts (USO), sporulated 7 h oocysts (SO 7h), sporulated oocysts (SO), sporozoites (S), and the second generation merozoites (SMG) of Eimeria tenella through a 4D label-free quantitative technique. Altogether, 8532 lysine acetylation sites on 2325 proteins were identified in E. tenella, among which 5445 sites on 1493 proteins were quantified. In addition, 557, 339, 478, 248, 241, and 424 differentially expressed proteins were identified in the comparisons SO7h vs USO, SO vs SO7h, SO vs USO, S vs SO, SMG vs S, and USO vs SMG, respectively. The bioinformatics analysis of the acetylome showed that the lysine acetylation is widespread on proteins of diverse functions. Moreover, the dynamic changes of lysine acetylome among E. tenella different life stages revealed significant regulation during the whole process of E. tenella growth and stage conversion. This study provides a beginning for the investigation of the regulate role of lysine acetylation in E. tenella and may provide new strategies for anticoccidiosis drug and vaccine development. Raw data are publicly available at iProX with the data set identifier PXD040368.


Assuntos
Eimeria tenella , Animais , Acetilação , Eimeria tenella/genética , Eimeria tenella/metabolismo , Lisina/metabolismo , Oocistos/metabolismo , Esporozoítos/metabolismo
4.
BMC Vet Res ; 19(1): 18, 2023 Jan 21.
Artigo em Inglês | MEDLINE | ID: mdl-36670401

RESUMO

BACKGROUND: Peste des petits ruminants (PPR), foot-and-mouth disease (FMD) and sheep pox and goat pox are three important infectious diseases that infect goats, sheep and other small ruminants. It is well-known that the prevention of three diseases rely mainly on their individual vaccines. However, the vaccines have a variety of different disadvantages, such as short duration of immunity, increasing the number of vaccinations, and poor thermal stability. The purpose of this study is to construct a recombinant goat pox virus (rGPV) capable of expressing the F gene of PPRV and the P12A3C gene of FMDV as a live vector vaccine. RESULTS: The IRES, FMDV P12A3C and PPRV F genes into the multi-cloning site of the universal transfer plasmid pTKfpgigp to construct a recombinant transfer plasmid pTKfpgigpFiP12A3C, and transfected GPV-infected lamb testis (LT) cells with liposomes and produced by homologous recombination Recombinant GPV (rGPV/PPRVF-FMDVP12A3C, rGPV). The rGPV was screened and purified by green florescence protein (GFP) and xanthine-guanine-phosphoribosyltransferase gene (gpt) of Escherichia coli as selective markers, and the expression of rGPV in LT cells was detected by RT-PCR and immunofluorescence techniques. The results showed that the virus strain rGPV/PPRVF-FMDVP12A3C containing FMDV P12A3C and PPRV F genes was obtained. The exogenous genes FMDV P12A3C and PPRV F contained in rGPV were normally transcribed and translated in LT cells, and the expression products could specifically react with PPRV and FMDV antiserum. Then, the rGPV was intradermally inoculated with goats, the animal experiments showed that rGPV/PPRVF-FMDVP12A3C could induce high levels of specific antibodies against GPV, PPRV and FMDV. CONCLUSIONS: The constructed rGPV induced high levels of specific antibodies against GPV, PPRV and FMDV. The study provides a reference for " one vaccine with multiple uses " of GPV live vector vaccine.


Assuntos
Capripoxvirus , Vírus da Febre Aftosa , Doenças das Cabras , Peste dos Pequenos Ruminantes , Vírus da Peste dos Pequenos Ruminantes , Doenças dos Ovinos , Vacinas Virais , Masculino , Ovinos , Animais , Vírus da Peste dos Pequenos Ruminantes/genética , Vírus da Febre Aftosa/genética , Capripoxvirus/genética , Anticorpos Antivirais , Vacinas Sintéticas , Peste dos Pequenos Ruminantes/prevenção & controle , Cabras
5.
BMC Vet Res ; 19(1): 273, 2023 Dec 15.
Artigo em Inglês | MEDLINE | ID: mdl-38102682

RESUMO

BACKGROUND: Mycoplasma ovipneumoniae (M. ovipneumoniae) is one of the main pathogens of sheep pneumonia, causing a series of clinical symptoms, such as depression, anorexia, hyperthermia, cough, dyspnea, and tract secretions. In recent years, the prevalence of M. ovipneumoniae pneumonia has become increasingly serious in sheep farms in Ningxia, China, leading to the death of sheep, and causing significant economic losses. In this study, the pathological organs infected by M. ovipneumoniae were collected to observe histopathological change, to determine the tissue localization of M. ovipneumoniae, and to analyze the cytokine changes, which lays a basis for the diagnosis and pathogenesis of M. ovipneumoniae disease. RESULTS: In this study, M. ovipneumoniae was detected in 97 of 105 samples collected from 13 large-scale sheep farms for nucleic acid by PCR. One representative isolate per farm was isolated from 13 farms. The lesions caused by M. ovipneumoniae were mainly in the trachea, bronchus, and lung, including necrosis of tracheal mucosal epithelial cells, disintegration of some epithelial cells, edema of mucosal lamina propria, with inflammatory cell infiltration, cytoplasmic vacuolization of epithelial cells of bronchial mucosa, massive infiltration of inflammatory cells in the alveolar space of lung, necrosis and hyperplasia of alveolar epithelial cells. Immunohistochemical analysis showed that the proportion of M. ovipneumoniae positive area in the lung was the largest, followed by that in the bronchus and trachea. Compared to healthy animals, diseased animals exhibited up-regulated gene expression levels of IL-1ß, IL-6, and NF-κB in the trachea, bronchus, and lungs. In contrast, the expression of IL-10, IL-12, and IFN-γ was primarily limited to the trachea and bronchus. The expression of IL-1ß showed differential patterns across different lung regions, with variations observed among lung lobes. Additionally, other cytokines consistently showed significant up-regulation specifically in the bronchus. CONCLUSIONS: M. ovipneumoniae is primarily found in the lungs of infected individuals. NF-κB, an essential transcription factor, is involved in the regulation of IL-1ß transcription. IL-12 may enhance the cytotoxic function of natural killer cells during M. ovipneumoniae infection. Those findings demonstrate the distinct expression profiles of cytokines in various anatomical sites throughout disease progression, suggesting the potential role of bronchial tissue as a major site of immune response.


Assuntos
Pneumonia por Mycoplasma , Doenças dos Ovinos , Humanos , Ovinos , Animais , Pneumonia por Mycoplasma/veterinária , Citocinas/genética , NF-kappa B , Interleucina-12 , Necrose/veterinária
6.
J Nurs Manag ; 30(2): 413-420, 2022 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-34796983

RESUMO

AIM: The purpose of this research was to explore nurses' mentorship, mentors' basic psychological needs satisfaction and transformational leadership. Moreover, this study evaluated the moderating role of a protégé's mindfulness. BACKGROUND: Previous research had only focused on the benefits that protégés reaped from the mentoring relationship, neglected the mentor's benefits. METHOD: We conducted an analysis of a cross-sectional sample comprising 366 frontline nurses in China. Descriptive, correlation and regression analyses were conducted using SPSS 22.0. Mediating, moderating and conditional process analyses were conducted using Process Macro 3.3. RESULTS: Mentorship is associated with mentors' transformational leadership through the satisfaction of their basic psychological needs (ß = .13, 95% confidence interval [CI]: [0.05, 0.23]). The indirect association of mentorship and transformational leadership is stronger for protégés with low mindfulness levels (ß = -.05, 95% CI: [-0.08, -0.02]). CONCLUSION: The establishment of healthy associations between mentors and protégés facilitates the fulfilment of the mentors' basic psychological needs, enhancing the former's transformational leadership, especially for protégés with low mindfulness levels. IMPLICATIONS FOR NURSING MANAGEMENT: Mentors should provide more meaningful knowledge about the organisation and protégés' career path, obtain information to help tailor the advice and put more energy into building trust-based relationships with protégés.


Assuntos
Tutoria , Mentores , Estudos Transversais , Humanos , Liderança , Mentores/psicologia , Confiança
7.
Parasitol Res ; 120(6): 2297-2301, 2021 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-34050827

RESUMO

In order to find a new preservation solution for avian coccidial oocysts that can replace potassium dichromate (K2Cr2O7) solution, Eimeria tenella oocysts were preserved in 0.1 to 10% potassium sorbate (C6H7KO2) solution in this study. The results showed that there was no significant difference between the sporulation rate of E. tenella oocysts preserved in 0.1 to 10% C6H7KO2 solution and in 2.5% K2Cr2O7 solution (p > 0.05). The 0.5 to 10% C6H7KO2 solution could also effectively inhibit the growth of bacterial microorganisms. E. tenella oocysts preserved in 1% C6H7KO2 solution at 4 °C for 3, 6, 9, and 12 months, with the oocyst production of E. tenella oocysts being 1.3-, 1.2-, 1.6-, and 1.3-fold higher than that of oocysts stored in 2.5% K2Cr2O7 solution (p < 0.05). In conclusion, C6H7KO2 could replace K2Cr2O7 as the preservation solution of avian coccidial oocysts.


Assuntos
Eimeria tenella/crescimento & desenvolvimento , Oocistos/crescimento & desenvolvimento , Preservação Biológica , Ácido Sórbico , Animais , Galinhas , Coccidiose , Eimeria , Doenças das Aves Domésticas/parasitologia , Esporos de Protozoários
8.
Int J Mol Sci ; 22(22)2021 Nov 09.
Artigo em Inglês | MEDLINE | ID: mdl-34829991

RESUMO

Protein phosphorylation is an important post-translational modification (PTM) involved in diverse cellular functions. It is the most prevalent PTM in both Toxoplasma gondii and Plasmodium falciparum, but its status in Eimeria tenella has not been reported. Herein, we performed a comprehensive, quantitative phosphoproteomic profile analysis of four stages of the E. tenella life cycle: unsporulated oocysts (USO), partially sporulated (7 h) oocysts (SO7h), sporulated oocysts (SO), and sporozoites (S). A total of 15,247 phosphorylation sites on 9514 phosphopeptides corresponding to 2897 phosphoproteins were identified across the four stages. In addition, 456, 479, and 198 differentially expressed phosphoproteins (DEPPs) were identified in the comparisons SO7h vs. USO, SO vs. SO7h, and S vs. SO, respectively. Gene Ontology (GO) term and Kyoto Encyclopedia of Genes and Genomes (KEGG) pathway enrichment analyses of DEPPs suggested that they were involved in diverse functions. For SO7h vs. USO, DEPPs were mainly involved in cell division, actin cytoskeleton organization, positive regulation of transport, and pyruvate metabolism. For SO vs. SO7h, they were related to the peptide metabolic process, translation, and RNA transport. DEPPs in the S vs. SO comparison were associated with the tricarboxylic acid metabolic process, positive regulation of ATPase activity, and calcium ion binding. Time course sequencing data analysis (TCseq) identified six clusters with similar expression change characteristics related to carbohydrate metabolism, cytoskeleton organization, and calcium ion transport, demonstrating different regulatory profiles across the life cycle of E. tenella. The results revealed significant changes in the abundance of phosphoproteins during E. tenella development. The findings shed light on the key roles of protein phosphorylation and dephosphorylation in the E. tenella life cycle.


Assuntos
Eimeria tenella/genética , Estágios do Ciclo de Vida/genética , Fosfoproteínas/genética , Animais , Eimeria tenella/classificação , Humanos , Oocistos/genética , Oocistos/crescimento & desenvolvimento , Fosfoproteínas/classificação , Processamento de Proteína Pós-Traducional
9.
BMC Nurs ; 20(1): 136, 2021 Aug 05.
Artigo em Inglês | MEDLINE | ID: mdl-34353309

RESUMO

BACKGROUND: Workplace climate is a great significant element that has an impact on nurses' behavior and practice; moreover, nurses' service behavior contributes to the patients' satisfaction and subsequently to the long-term success of hospitals. Few studies explore how different types of organizational ethical climate encourage nurses to engage in both in-role and extra-role service behaviors, especially in comparing the influencing process between public and private hospitals. This study aimed to compare the relationship between the five types of ethical climate and nurses' in-role and extra-role service behaviors in public and private hospitals. METHODS: This study conducted a cross-sectional survey on 559 nurses from China in May 2019. The questionnaire was distributed to nurses by sending a web link via the mobile phone application WeChat through snowball sampling methods. All participants were investigated using the Ethical Climate Scale and Service Behavior Questionnaire. SPSS 22.0 was used for correlation analysis, t-test, and analysis of variance test, and Mplus 7.4 was used for group comparison (p < .05). RESULTS: The law and code climate has a much greater influence on nurses' in-role service behavior in private hospitals than on that in public hospitals (ß = - 0.277; CI 95 % = [-0.452, - 0.075]; p < .01), and the instrumental climate has a stronger influence on nurses' extra-role service behavior private hospitals than on that in public hospitals (ß = - 0.352; CI 95 % = [-0.651, - 0.056]; p < .05). Meanwhile, the rules climate has a greater effect on nurses' extra-role service behavior in public hospitals than it does in private hospitals (ß = 0.397; CI 95 % = [0.120, 0.651]; p < .01). CONCLUSIONS: As the relationship between the five types of ethical climate and nurses' in-role and extra-role service behaviors in public and private hospitals were different, the strategies used to foster and enhance the types of ethical climate are various from public to private hospitals. The caring and instrumental climate are the key to promote extra-role service behavior for nurses in private hospitals. And the independent climate has a great effect on extra-role service behaviors for nurses in public hospitals.

10.
Nurs Ethics ; 27(3): 855-867, 2020 May.
Artigo em Inglês | MEDLINE | ID: mdl-31631767

RESUMO

BACKGROUND: The three-dimensional model of nurses' moral sensitivity has typically been studied using a variable-centered rather than a person-centered approach, preventing a more complete understanding of how these forms of moral sensitivity are expressed as a whole. Latent profile analysis is a person-centered approach that classifies individuals from a heterogeneous population into homogeneous subgroups, helping identify how different subpopulations of nurses use distinct combinations of different moral sensitivities to affect their service behaviors. OBJECTIVE: Latent profile analysis was used to identify three distinct profiles of nurses' moral sensitivity. Associations of the profiles with service behaviors were then examined. METHODS: Five hundred twenty-five nurses from three tertiary hospitals in China were investigated with Moral Sensitivity Questionnaire and Nurses' Service Behavior Scale. Latent profile analysis was used to analyze the data. ETHICAL CONSIDERATIONS: Approval was obtained from the Ethics committee for biomedical research of Medical College, the Hebei University of Engineering. RESULTS: A three-profile moral sensitivity model provided the best fit to the data. The resulting profiles were low moral sensitivity, moderate moral sensitivity, and high moral sensitivity. There were significant differences in service behaviors among different profiles of moral sensitivity. CONCLUSION: The results provide a new and expanded view of nurses' moral sensitivity, which may be used to monitor nurses' service behaviors comprehensively and to evaluate nursing ethics management strategies.


Assuntos
Enfermeiras e Enfermeiros/psicologia , Estresse Psicológico/complicações , Adulto , China , Ética em Enfermagem , Feminino , Humanos , Análise de Classes Latentes , Masculino , Psicometria/instrumentação , Psicometria/métodos , Estresse Psicológico/etiologia , Estresse Psicológico/psicologia , Inquéritos e Questionários
12.
J Adv Nurs ; 75(9): 1868-1876, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-30697786

RESUMO

AIM: To explore the relationship between ethical climate (EC) and nurses' service behaviours (SB) and examine the moderating effect of nurses' employment type. BACKGROUND: As most public hospitals in China implement the "dual-track system" of nurses' employment, the two different types of nurses, contract-employed nurses and state-employed nurses, receive the different pay for the same work, which results in they providing different SB. It has become critical for hospital administrators and nursing managers to understand better the state of two groups of nurses and to find an effective method to improve the service level of the nursing workforce. DESIGN: Stepwise multiple regression analyses of survey data collected in June and July 2017 from Chinese nurses employed in three tertiary hospitals. METHODS: Chinese nurses (298 of 350 [85.1%]) were interviewed using the Ethical Climate Scale and Nurses' Service Behaviour Scale. Data were analysed statistically using descriptive statistics, confirmatory factor analysis, correlation coefficients (Pearson), two-tailed t-test and stepwise multiple regression analyses were conducted to test the proposed hypotheses. Data were analysed using SPSS and AMOS. RESULTS: There were statistically significant correlations between EC and nurses' extra-role service behaviour (ERSB) and overall service behaviour and nurses' employment type moderated the proposed relationships. CONCLUSION: Healthcare institutions should pay more attention to cultivate EC and implement new incentive mechanism to better stimulate nurses to provide ERSB.


Assuntos
Povo Asiático/psicologia , Atitude do Pessoal de Saúde , Economia da Enfermagem , Satisfação no Emprego , Enfermeiros Administradores/psicologia , Cuidados de Enfermagem/psicologia , Recursos Humanos de Enfermagem Hospitalar/psicologia , Adulto , China , Feminino , Humanos , Masculino , Pessoa de Meia-Idade , Adulto Jovem
13.
Nurs Ethics ; 26(6): 1861-1872, 2019 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-30078367

RESUMO

BACKGROUND: Nurses' service behaviors have critical implications for hospitals. However, few studies had adequate ethical considerations of service behaviors and accounted for how organizational or individual antecedents can induce nurses to engage in service behaviors. In addition, they mainly focused on the one side of role-prescribed or extra-role service behavior. OBJECTIVE: This study aims to explore the chained mediation effect of ethical climate and moral sensitivity on the relationship between organizational ethical leadership and nurses' service behaviors and to examine the relationship, from a comparative view, of the role-prescribed service behavior and extra-role service behavior. METHODS: In all, 476 nurses from three tertiary hospitals were investigated with the Ethical Leadership Scale, Ethical Climate Scale, Moral Sensitivity Questionnaire and Service Behavior Questionnaire. Structural equation modeling was adopted to analyze the data. SPSS and Mplus statistical software was used in the data analysis. ETHICAL CONSIDERATIONS: Approval was obtained from the Ethics Committee at School of Nursing, Hebei Medical University. Data privacy and confidentiality were maintained and assured by obtaining subjects' informed consent to participate in the research before data collection. RESULTS: The effects of ethical leadership on nurses' service behaviors are mediated by two variables in turn: ethical climate and nurses' moral sensitivity. Ethical climate and moral sensitivity partially mediated the relationship between ethical leadership and nurses' role-prescribed service behavior and fully mediated the relationship between ethical leadership and nurses' extra-role service behavior. CONCLUSION: Organizational ethical leadership positively affected ethical climate, which positively affected nurses' moral sensitivity and affected both their role-prescribed service behavior and extra-role service behavior.


Assuntos
Liderança , Enfermeiras e Enfermeiros/psicologia , Enfermeiras e Enfermeiros/normas , Cultura Organizacional , Adulto , Atitude do Pessoal de Saúde , Ética em Enfermagem , Feminino , Humanos , Satisfação no Emprego , Masculino , Enfermeiras e Enfermeiros/estatística & dados numéricos , Qualidade da Assistência à Saúde/normas , Qualidade da Assistência à Saúde/estatística & dados numéricos , Inquéritos e Questionários
14.
J Nurs Manag ; 27(7): 1568-1575, 2019 Oct.
Artigo em Inglês | MEDLINE | ID: mdl-31433889

RESUMO

AIM: The aim of this study was to explore nurses' feedback seeking, the contextual issues established by mentors and career adaptability in a Chinese context. In addition, this research explored the moderating role of nurses' political skill. BACKGROUND: Mentors play a direct, important and distinct role in supporting mentees. However, little is known about the relationship between the contextual elements of mentor feedback and nurses' career adaptability. DESIGN: This study was based on cross-sectional data collected from 303 frontline nurses. METHOD: SPSS 22.0 was used for correlation and regression analysis, and the SPSS PROCESS macro was used for mediating, moderating and conditional process analysis. RESULTS: Feedback environment established by the mentor is associated with nurses' feedback-seeking behaviour and career adaptability. The indirect association of feedback environment with career adaptability via feedback seeking is stronger for employees with high political skill than those with low political skill. CONCLUSION: When mentors create a suitable context for feedback, nurses' career adaptability can be enhanced through feedback seeking, especially for nurses with high political skill. IMPLICATIONS FOR NURSING MANAGEMENT: Nurse managers should strive to build a supportive feedback environment established by mentor. It is necessary to improve nurses' political skills.


Assuntos
Mobilidade Ocupacional , Retroalimentação , Tutoria/métodos , Adulto , Atitude do Pessoal de Saúde , China , Estudos Transversais , Feminino , Humanos , Masculino , Tutoria/tendências , Inquéritos e Questionários
15.
Parasitol Res ; 116(5): 1573-1579, 2017 May.
Artigo em Inglês | MEDLINE | ID: mdl-28361273

RESUMO

To date, little is known about cytosine methylation in the genomic DNA of apicomplexan parasites, although it has been confirmed that this important epigenetic modification exists in many lower eukaryotes, plants, and animals. In the present study, ELISA-based detection demonstrated that low levels of 5-methylcytosine (5-mC) are present in Eimeria spp., Toxoplasma gondii, Cryptosporidium spp., and Neospora caninum. The proportions of 5-mC in genomic DNA were 0.18 ± 0.02% in E tenella sporulated oocysts, 0.19 ± 0.01% in E. tenella second-generation merozoites, 0.22 ± 0.04% in T. gondii tachyzoites, 0.28 ± 0.03% in N. caninum tachyzoites, and 0.06 ± 0.01, 0.11 ± 0.01, and 0.09 ± 0.01% in C. andersoni, C. baileyi, and C. parvum sporulated oocysts, respectively. In addition, we found that the percentages of 5-mC in E. tenella varied considerably at different life stages, with sporozoites having the highest percentage of 5-mC (0.78 ± 0.10%). Similar stage differences in 5-mC were also found in E. maxima, E. necatrix, and E. acervulina, the levels of 5-mC in their sporozoites being 4.3-, 1.8-, 2.5-, and 2.0-fold higher than that of sporulated oocysts, respectively (p < 0.01). Furthermore, a total DNA methyltransferase-like activity was detected in whole cell extracts prepared from E. tenella sporozoites. In conclusion, genomic DNA methylation is present in these apicomplexan parasites and may play a role in the stage conversion of Eimeria.


Assuntos
5-Metilcitosina/análise , Galinhas/parasitologia , Coccidiose/veterinária , Cryptosporidium/genética , DNA de Protozoário/genética , Eimeria tenella/genética , Neospora/genética , Toxoplasma/genética , Animais , Coccidiose/parasitologia , Metilação de DNA/genética , Ensaio de Imunoadsorção Enzimática , Merozoítos/citologia , Oocistos/citologia , Esporozoítos/citologia
16.
PLoS One ; 19(2): e0295403, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38354180

RESUMO

During the COVID-19 epidemic, national innovation faced the challenges of high-risk research and development and intensified trade competition. How to allocate resources reasonably to promote national innovation has become a problem that must be solved. Based on the global innovation index (GII) framework, this study analyzes the influence of national innovation input elements (such as human capital resources, infrastructure, business maturity, etc.) on innovation output from the perspective of configuration, combining with the necessary condition analysis (NCA) and fuzzy set/qualitative comparative analysis (FSQCA). The research results show that:(1) A single innovation input constitutes the necessary condition and serves as a bottleneck for high innovation output;(2) ITT, HCR, IFT, MS and BS are all "multiple concurrent" and form different configurations, namely, two high-innovation and four nonhigh innovation configurations, that drive national innovation governance is characterized by "different roads leading to the same goals." (3) As innovation is limited by the income levels of various countries, there are obvious differences in innovation drive paths between high- and low-income countries. Moreover, the configuration of asymmetric relationships with low-innovation output that occurs in high-income countries has unique characteristics. In this study, the influence of the coupling of national innovation input elements on innovation output is explored.


Assuntos
COVID-19 , Epidemias , Humanos , COVID-19/epidemiologia , Comércio , Cabeça , Renda
17.
Vet Parasitol ; 328: 110193, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38704976

RESUMO

In prokaryotes and lower eukaryotes, 2-methylcitrate cycle (2-MCC) is the main pathway for propionate decomposition and transformation, but little is known about the 2-MCC pathway of Eimeria tenella. The analysis of genomic data found that the coding gene of 2- methylcitrate synthase (EC 2.3.3.5, PrpC) exists in E. tenella, which is a key enzyme of 2-MCC pathway. Through the search analysis of the database (ToxoDB), it was found that ETH_ 00026655 contains the complete putative sequence of EtprpC. In this study, we amplified the ORF sequence of EtprpC based on putative sequence. Then, prokaryotic expression, enzyme activity and kinetic analysis was performed. The results showed that the EtprpC ORF sequence was 1272 bp, encoding a 46.3 kDa protein comprising 424 amino acids. Enzyme activity assays demonstrate linearity between the initial reaction rate (OD/min) and EtPrpC concentration (ranging from 1.5 to 9 µg/reaction), with optimal enzyme activity observed at 41°C and pH 8.0. The results of enzymatic kinetic analysis showed that the Km of EtPrpC for propionyl-CoA, oxaloacetic acid, and acetyl-CoA was 5.239 ± 0.17 mM, 1.102 ± 0.08 µM, and 5.999 ± 1.24 µM, respectively. The Vmax was 191.11 ± 19.1 nmol/min/mg, 225.48 ± 14.4 nmol/min/mg, and 370.02 ± 25.8 nmol/min/mg when EtPrpC concentration at 4, 6, and 8 µg, respectively. Although the ability of EtPrpC to catalyze acetyl-CoA is only 0.11% of its ability to catalyze propionyl-CoA, it indicates that the 2-MCC pathway in E. tenella is similar to that in bacteria and may have a bypass function in the TCA cycle. This study can provide the theoretical foundation for the new drug targets and the development of new anticoccidial drugs.


Assuntos
Clonagem Molecular , Eimeria tenella , Eimeria tenella/enzimologia , Eimeria tenella/genética , Cinética , Citrato (si)-Sintase/genética , Citrato (si)-Sintase/metabolismo , Sequência de Aminoácidos , Citratos/metabolismo
18.
Vet Parasitol ; 327: 110131, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38301346

RESUMO

Eimeria tenella infections are known to cause severe caecal damage and death of the infected chicken. Gamogony is an essential stage in E. tenella life cycle and in the establishment of coccidiosis. Prior research had extensively explored isolation and separation of the parasite gametes - microgamete (male) and macrogamete (female). However, there is little information on the efficient, highly purified and distinctly separated male and female gametes. In this study, we generated a genome editing line expressing mCherry fluorescent protein fused with GCS1 protein in E. tenella by using Toxoplasma gondii CRISPR-Cas9 system, flow cytometry and fluorescence microscopy. This allowed precise separation of E. tenella male and female gametes in the transgenic parasite population. The separation of male and female gametes would not only build on our understanding of E. tenella transmission, but it would also facilitate development of gametocidal compounds as drug targets for E. tenella infection.


Assuntos
Coccidiose , Eimeria tenella , Doenças das Aves Domésticas , Proteína Vermelha Fluorescente , Feminino , Masculino , Animais , Eimeria tenella/genética , Sistemas CRISPR-Cas , Coccidiose/genética , Coccidiose/veterinária , Estágios do Ciclo de Vida , Galinhas , Doenças das Aves Domésticas/parasitologia
19.
Artigo em Inglês | MEDLINE | ID: mdl-36293947

RESUMO

The mentoring relationship affects the growth and development of new employees. For nurses, the uncertainty of the influence of the mentoring relationship may be magnified by the unique nature of hospitals as public departments, however it is unclear whether and how nurses' mentoring relationship influence the outcome. Protean career orientation defined as a tendency of individuals to achieve subjective career success through self-management of their career is crucial to the influence mechanism of the mentoring relationship. The aim of this study was to explore the path and boundary conditions of the influence of the nurses' mentoring relationship on organizational commitment. As a cross-sectional sample, 371 nurses were investigated. The results showed that protégé career optimism plays an intermediary role in the influence of the mentoring relationship on organizational commitment, and protean career orientation plays a moderating role in the influence of the mentoring relationship on career optimism. The mentor relationship between mentors and protégés facilitates protégés' career optimism, enhancing the protégés' organizational commitment, especially for protégés with low protean career orientation. These findings contribute to the improving nurses' organizational commitment through mentoring relationship. Hospitals should provide space for nurses to exert their abilities, enhance opportunities to improve their team cooperation ability, clearly define the scope of nurses' work and rights, and give nurses the right to make decisions.


Assuntos
Tutoria , Enfermeiras e Enfermeiros , Humanos , Mentores , Estudos Transversais
20.
Nurs Open ; 8(3): 1038-1047, 2021 05.
Artigo em Inglês | MEDLINE | ID: mdl-33393229

RESUMO

AIM: Less empirical attention has been paid to the positive relationship between voice behaviour and voice speaker development, such as self-leadership. The present study explores the relationship among nurses' voice, perceived insider status and self-leadership. METHOD: This study was based on time-lagged survey data collected from 608 frontline nurses. jamovi and PROCESS macro were used for analysis. RESULTS: Promotive voice and prohibitive voice were positively associated with self-leadership. Perceived inside status mediated the relationship between promotive voice/prohibitive voice and self-leadership. Prohibitive voice was more strongly related to self-leadership than promotive voice. CONCLUSIONS: When nurses dare to voice, nurses' self-leadership can be enhanced through perceived insider status improving, especially for nurses who dare to prohibitive voice. IMPLICATIONS FOR NURSING MANAGEMENT: Nurse managers should protect the privacy of voice, continually provide feedback on voice and set up special encouragement for prohibitive voice.


Assuntos
Liderança , Enfermeiros Administradores , Humanos , Negociação , Inquéritos e Questionários
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