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1.
Viruses ; 16(2)2024 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-38400002

RESUMO

In Chile, edible herbs are mainly grown by small farmers. This type of horticultural crop typically requires intensive management because it is highly susceptible to insects, some of which transmit viruses that severely affect crop yield and quality. In 2019, in coriander plants tested negative for all previously reported viruses, RNA-Seq analysis of one symptomatic plant revealed a plethora of viruses, including one virus known to infect coriander, five viruses never reported in coriander, and a new cytorhabdovirus with a 14,180 nucleotide RNA genome for which the species name Cytorhabdovirus coriandrum was proposed. Since all the detected viruses were aphid-borne, aphids and weeds commonly growing around the coriander field were screened for viruses. The results showed the occurrence of the same seven viruses and the alfalfa mosaic virus, another aphid-borne virus, in aphids and weeds. Together, our findings document the presence of multiple viruses in coriander and the potential role of weeds as virus reservoirs for aphid acquisition.


Assuntos
Afídeos , Coriandrum , Vírus de Plantas , Vírus , Animais , Chile/epidemiologia , Plantas , Doenças das Plantas , Vírus de Plantas/genética
2.
J Adv Nurs ; 2024 Jan 31.
Artigo em Inglês | MEDLINE | ID: mdl-38294093

RESUMO

AIM: To develop a framework for understanding the stress appraisal process among acute care nurses during the COVID-19 pandemic. DESIGN: A secondary analysis of open-ended responses from a cross-sectional survey of 3030 frontline, acute care nurses in New Jersey and the effect of burnout during the COVID-19 pandemic. METHODS: Lazarus and Folkman's transactional model of stress and coping guided the study. Thematic analysis was used to analyse 1607 open-ended responses. RESULTS: Nine themes emerged during the secondary appraisal of stress. Five themes contributed to distress and burnout including (1) high patient acuity with scarce resources, (2) constantly changing policies with inconsistent messaging, (3) insufficient PPE, (4) unprepared pandemic planning and (5) feeling undervalued. Four themes led to eustress and contributed to post-traumatic growth including (1) team nursing to ensure sufficient resource allocation, (2) open channels of communication, (3) sense- of-duty and (4) personal strength from new possibilities. CONCLUSION: The COVID-19 pandemic was a traumatic event for patients and the nursing workforce. Internal and external demands placed on acute care nurses increased burnout, however, a subset of nurses with adequate support experienced personal growth. IMPLICATIONS FOR THE PROFESSION AND/OR PATIENT CARE: Beyond mental health interventions for acute care nurses, organizational interventions such as reevaluation of emergency action plans to optimize resource allocation, and work environment strategies such as improved communication and decision-making transparency are necessary. IMPACT: To better understand how frontline acute care nurses experienced stress during COVID-19, a data-informed framework was developed that included a primary and secondary appraisal of stress. Themes contributing to distress and burnout were identified, and themes leading to eustress and post-traumatic growth were also identified. These findings can assist nurse leaders in optimizing strategies to reduce burnout and promote post-traumatic growth in the post-COVID years. REPORTING METHOD: No patient or public contribution.

4.
Nurs Res ; 73(2): 101-108, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-37862123

RESUMO

BACKGROUND: Missed care is defined as the omission or delay of necessary patient care and is internationally reported by nurses as a significant safety risk. Nurses working at night also report high levels of occupational fatigue that, coupled with inadequate staffing and practice environment support, may impede a nurse's ability to carry out the nursing process and lead to more missed care. OBJECTIVE: The study's objective was to examine the interrelationships among organizational and nurse characteristics, occupational fatigue, and missed care among nurses working at night. METHODS: A cross-sectional design was used. Participants included registered nurses (RNs) who worked at night in New Jersey acute care hospitals. Multiple linear regression and simple moderation analyses were performed to examine the associations. RESULTS: Nurses reported missing necessary care at night. Unsupportive practice environments, high RN workloads, high patient-RN ratios, high chronic fatigue levels, and low intershift recovery were individually associated with missed care at night. High patient-to-RN ratios and chronic fatigue were independently associated with missed care. However, patient-to-registered-staffing levels had the most considerable effect on missed care at night. Nurses' years of experience and the number of hours of sleep between shifts were significant moderators of the relationship between occupational fatigue states and missed care. DISCUSSION: This study is the first to examine the interrelationship between occupational fatigue levels, organizational and nurse characteristics, and missed care at night. There is an urgent need to implement strategies in hospital organizations that foster work schedules and adequate staffing patterns that lessen nurses' occupational fatigue levels to ensure our workforce's and patients' safety.


Assuntos
Síndrome de Fadiga Crônica , Recursos Humanos de Enfermagem Hospitalar , Humanos , Estudos Transversais , Admissão e Escalonamento de Pessoal , Carga de Trabalho , Modelos Lineares
5.
Am J Infect Control ; 51(12): 1295-1301, 2023 Dec.
Artigo em Inglês | MEDLINE | ID: mdl-37625547

RESUMO

BACKGROUND: The COVID-19 pandemic has adversely impacted quality of care and patient safety. This study aimed to describe registered nurses' (RNs) perceptions on the impact of the COVID-19 pandemic on their ability to adhere to patient safety protocols using Donabedian's Health Care Quality model. METHODS: In October 2020, a survey was conducted among all actively licensed RNs in New Jersey who provided direct patient care during the first peak of COVID-19. RESULTS: Of 3,027 participants, 68% reported that the number of patients assigned impacted their ability to adhere to protocols. RNs identified a variety of organizational structures impacting adherence, including inadequate staffing, staff qualifications, and inadequate resources. Impacted processes included the inability to adhere to patient safety protocols and conduct comprehensive assessments and surveillance, the need for additional time spent on personal protective equipment and isolation policies, and difficulty maintaining isolation integrity; the need to prioritize and cluster care; and guidelines limiting personnel who could enter the room. Nurses attributed both adverse patient and staff outcomes to inadequate staffing and high patient acuity. CONCLUSIONS: These findings highlight the need for health care organizations to support frontline nursing staff in adhering to patient safety and infection prevention and control protocols during times of crises. Infection preventionists have substantial contact with bedside nurses and should leverage their collegial relationships to promote patient safety.


Assuntos
COVID-19 , Enfermeiras e Enfermeiros , Recursos Humanos de Enfermagem Hospitalar , Humanos , Segurança do Paciente , Pandemias/prevenção & controle , Qualidade da Assistência à Saúde , Avaliação de Processos e Resultados em Cuidados de Saúde
6.
J Contin Educ Nurs ; 54(7): 327-336, 2023 Jul.
Artigo em Inglês | MEDLINE | ID: mdl-37390303

RESUMO

BACKGROUND: Historically, evidence has shown the importance of nurse residency programs, yet few organizations have implemented them outside of hospital settings. This article shares nurses' experiences and outcomes in an out-of-hospital nurse residency program that transitioned bachelor of science in nursing graduates through an academic-practice partnership. METHOD: A mixed methods design was used that consisted of qualitative interviews (pre- and postresidency) and quantitative surveys (Casey-Fink Graduate Nurse Experience Survey, a job satisfaction survey, and a preceptee evaluation survey). RESULTS: Forty-four nurses participated. Qualitative findings were supported by the quantitative data. Results showed that confidence, competence, job satisfaction, and retention improved with an out-of-hospital residency program. CONCLUSION: Ensuring that every new graduate is afforded a nurse residency should be the goal, regardless of setting, to reduce turnover, ensure workforce stability, and ultimately improve patient outcomes. Academic-practice partnerships can help build resource capacity, especially in these settings, to achieve this goal. [J Contin Educ Nurs. 2023;54(7):327-336.].


Assuntos
Hospitais , Internato e Residência , Humanos , Satisfação no Emprego , Reorganização de Recursos Humanos , Recursos Humanos
7.
Am J Med Qual ; 38(4): 206-208, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-37382307

RESUMO

Infection preventionists are specialized health care professionals tasked with developing and implementing infection control policies, educating staff and patients on prevention practices, and investigating outbreaks. Infection preventionists role in developing effective measures for infection prevention and control and ensuring public health and safety became even more vital given the emergence of the COVID-19 pandemic. It is important for health care systems and institutions to incorporate lessons learned, enhance infection prevention and control resources, and grow the infection preventionists workforce to prepare for future pandemic events.


Assuntos
COVID-19 , Humanos , COVID-19/prevenção & controle , Pandemias/prevenção & controle , Pessoal de Saúde , Controle de Infecções , Saúde Pública
9.
J Nurs Care Qual ; 38(3): 203-210, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-36477084

RESUMO

BACKGROUND: Licensed practical nurses (LPNs) working in nursing homes are the primary licensed nurses providing care and ensuring patient safety in New Jersey. As such, it is important to understand LPNs' perception of patient safety culture (PSC) and job satisfaction, which may impact resident safety. PURPOSE: To describe the relationship between LPNs' perception of PSC in nursing homes and job satisfaction. METHODS: A cross-sectional study design was used to survey LPNs in New Jersey. RESULTS: LPNs working in nursing homes were less satisfied than LPNs working in other settings, and their perception of PSC was lower than that in 2019 national data report. CONCLUSION: LPNs in nursing homes indicated that PSC needs improvement. Now is an opportune time to implement initiatives to foster a culture of safety in nursing homes.


Assuntos
Técnicos de Enfermagem , Humanos , Segurança do Paciente , Estudos Transversais , Casas de Saúde , Gestão da Segurança
10.
JBI Evid Synth ; 21(1): 33-97, 2023 01 01.
Artigo em Inglês | MEDLINE | ID: mdl-35975311

RESUMO

OBJECTIVE: The objective of this review was to examine the available evidence on the experiences and perceptions of nurses working the night shift within any specialty in the acute care, subacute, or long-term care setting. INTRODUCTION: Nurses are required for around-the-clock patient care. Night shift nurses can experience detrimental effects because of their work hours, which disrupt their normal circadian rhythm. Understanding nurses' experiences and perceptions when working night shift will facilitate the development of strategies to minimize the potential negative effects of working at night. In examining nurses' experiences and perceptions of working night shift, there is scope to explore how to improve night shift nurses' practice environment and job satisfaction, which will then translate to improved nurse and patient outcomes. INCLUSION CRITERIA: This review included qualitative studies focused on the experiences and perceptions of registered nurses and licensed practical nurses who work the night shift or rotate between day and night shift. METHODS: This review followed the JBI methodology for systematic reviews of qualitative evidence. The methodology used was consistent with the a priori protocol. Studies included in this review were those published in full text, English, and between 1983 (when the seminal work on hospitals that attract and retain nurses was published) and February 2021, when the search was completed. The main databases searched for published and unpublished studies included MEDLINE, CINAHL, Embase, PsycINFO, and Web of Science.From the search, two reviewers independently screened the studies against the inclusion criteria, and then papers selected for inclusion were assessed for methodological quality. Qualitative data were extracted from the included papers independently by the four reviewers. Results from each reviewer were discussed and clarified to reach agreement. The extracted findings were pooled and examined for shared meaning, coded, and grouped into categories. Common categories were grouped into meta-synthesis to produce a comprehensive set of synthesized findings. The final synthesized findings were graded using the ConQual approach to determine the level of confidence (trust) users may have in the value of the synthesized findings. RESULTS: Thirty-four papers, representing 33 studies, met the criteria for inclusion. The studies were conducted in 11 countries across six continents, with a total of 601 participants. From these, a total of 220 findings were extracted and combined to form 11 categories based on similarity in meaning, and three syntheses were derived: i) The "Other" Shift: the distinctiveness of night nursing; ii) Juggling sleep and all aspects of life when working nights; and iii) Existing in the Twilight Zone: battling the negative impact of sleep deprivation consumes nurses who strive to keep patients, self, and others safe. CONCLUSIONS: The major conclusions from this review are the uniqueness of working the night shift and the sleep deprivation of night nurses. Organizational strategies and support are needed for those working this shift, which will enhance nurse and patient safety. SYSTEMATIC REVIEW REGISTRATION NUMBER: PROSPERO CRD42019135294.


Assuntos
Enfermeiras e Enfermeiros , Privação do Sono , Humanos , Pesquisa Qualitativa , Competência Clínica
11.
J Nurs Adm ; 52(7-8): 419-426, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-35857913

RESUMO

OBJECTIVE: The aim of this study was to examine the self-reported perceptions of the healthy work environment (HWE) of nurses who are members of Nursing Workplace Environment and Staffing Councils (NWESCs). BACKGROUND: In a statewide initiative, NWESCs were established at hospitals throughout the state of New Jersey as an alternative to nurse staffing ratio laws and to provide clinical nurses a voice in determining resources needed for patient care and support an HWE. METHODS: This quantitative descriptive study presents the results of the Healthy Workplace Environment Assessment Tool (HWEAT) and open-ended questions about NWESCs among a sample of 352 nurses. RESULTS: Three years after NWESC implementation, all HWEAT standard mean scores increased and were rated higher than the American Association of Critical-Care Nurses benchmark. There were statistically significant differences in clinical nurses' perceptions of an HWE compared with nurse leaders. Respondents also shared their NWESC's best practices and challenges. Responses to questions identified NWESC best practices and challenges. CONCLUSION: This study offers insight into the improvement in nurses' perceptions of the HWE after the introduction of a statewide NWESCs. Structures such as the NWESCs may provide an alternative to mandated staffing ratios.


Assuntos
Recursos Humanos de Enfermagem Hospitalar , Recursos Humanos de Enfermagem , Hospitais , Humanos , New Jersey , Admissão e Escalonamento de Pessoal , Recursos Humanos , Local de Trabalho
12.
Nurs Clin North Am ; 57(2): 287-297, 2022 06.
Artigo em Inglês | MEDLINE | ID: mdl-35659989

RESUMO

Protecting frail older residents from adverse health outcomes associated with preventable illnesses and conditions, such as geriatric syndromes within the long-term care (LTC) health system requires attention by the health care team, led by professional nurse leaders, to all of the operant contextual factors influencing health outcomes. Mitchell's Health Outcomes Model helps to frame these operant contextual factors to help understand how the person and the situation are viewed, which then directs professional nurse leaders' interventions. Utilization of the LTC facilities Quality Metrics data can shape and inform nurses leaders as to the gaps which can be filled to meet resident care needs operant among these modifiable contextual factors.


Assuntos
Fragilidade , Cuidados de Enfermagem , Idoso , Humanos , Assistência de Longa Duração , Avaliação de Resultados em Cuidados de Saúde
13.
J Nurs Manag ; 30(6): 1913-1921, 2022 Sep.
Artigo em Inglês | MEDLINE | ID: mdl-35478365

RESUMO

AIM: The aim of this work is to examine staffing, personal protective equipment (PPE) adequacy and physical exhaustion that contributed to burnout and intent to leave among hospital nurses during the first peak of the COVID-19 pandemic. BACKGROUND: Burnout is associated with adverse nurse and patient outcomes. Identifying the magnitude of burnout that occurred during the pandemic can prepare managers for the long-term mental health effects on nurses. METHODS: A cross-sectional, electronic survey was administered to examine perceptions of burnout and intent to leave among all New Jersey hospital nurses from October 6 to October 26, 2020. RESULTS: A total of 3030 nurses responded with 64.3% reporting burnout and 36.5% reporting intent to leave the hospital within a year. There was a significant association between high levels of burnout and intent to leave (χ2  = 329.4; p = .001). There was no association between staffing and burnout; however, reporting inadequate PPE (OR = 1.77 [95% CI: 1.34-2.34]) and physical exhaustion (OR = 3.89 [95% CI: 3.19-4.76]) remained predictors of burnout among nurses. CONCLUSION: Inadequate PPE and physical exhaustion coupled with short staffing contributed to burnout and intent to leave. IMPLICATIONS FOR NURSING MANAGEMENT: Managers should continue to utilize evidence-based mental health interventions and advocate within their nursing professional organizations for relief funds to reduce burnout.


Assuntos
Esgotamento Profissional , COVID-19 , Enfermeiras e Enfermeiros , Recursos Humanos de Enfermagem Hospitalar , Esgotamento Profissional/complicações , Esgotamento Profissional/etiologia , COVID-19/epidemiologia , Estudos Transversais , Fadiga/complicações , Hospitais , Humanos , Satisfação no Emprego , New Jersey/epidemiologia , Recursos Humanos de Enfermagem Hospitalar/psicologia , Pandemias , Inquéritos e Questionários , Local de Trabalho/psicologia
14.
Am J Infect Control ; 50(5): 572-574, 2022 05.
Artigo em Inglês | MEDLINE | ID: mdl-35158011

RESUMO

Nurses play an important role in the vaccine readiness process and high vaccination rates among nurses are essential to ensuring successful vaccination programs. This study sought to examine whether the intention to get vaccinated varied by race and/or ethnicity among a large sample of registered nurses in New Jersey.


Assuntos
COVID-19 , Enfermeiras e Enfermeiros , Vacinas contra COVID-19 , Estudos Transversais , Humanos , New Jersey , SARS-CoV-2 , Vacinação , Hesitação Vacinal
15.
Health Serv Res ; 56(6): 1262-1270, 2021 12.
Artigo em Inglês | MEDLINE | ID: mdl-34378181

RESUMO

OBJECTIVE: To examine how estimates of the association between nurse staffing and patient length of stay (LOS) change with data aggregation over varying time periods and settings, and statistical controls for unobserved heterogeneity. DATA SOURCES/STUDY SETTING: Longitudinal secondary data from October 2002 to September 2006 for 215 intensive care units and 438 general acute care units at 143 facilities in the Veterans Affairs (VA) health care system. RESEARCH DESIGN: This retrospective observational study used unit-level panel data to analyze the association between nurse staffing and LOS. This association was measured over both a month-long and a year-long period, with and without fixed effects. DATA COLLECTION: We used VA administrative data to obtain patient data on the severity of illness and LOS, as well as labor hours and wages for each unit by month. PRINCIPAL FINDINGS: Overall, shorter LOS was associated with higher nurse staffing hours and lower proportions of hours provided by licensed professional nurses (LPNs), unlicensed personnel, and contract staff. Estimates of the association between nurse staffing and LOS changed in magnitude when aggregating data over years instead of months, in different settings, and when controlling for unobserved heterogeneity. CONCLUSIONS: Estimating the association between nurse staffing and LOS is contingent on the time period of analysis and specific methodology. In future studies, researchers should be aware of these differences when exploring nurse staffing and patient outcomes.


Assuntos
Agregação de Dados , Tempo de Internação/estatística & dados numéricos , Recursos Humanos de Enfermagem Hospitalar/estatística & dados numéricos , Admissão e Escalonamento de Pessoal/estatística & dados numéricos , Demandas Administrativas em Assistência à Saúde/estatística & dados numéricos , Idoso , Feminino , Humanos , Estudos Longitudinais , Masculino , Estudos Retrospectivos , Índice de Gravidade de Doença , Fatores de Tempo , Estados Unidos , United States Department of Veterans Affairs
16.
J Am Med Dir Assoc ; 22(11): 2373-2377, 2021 11.
Artigo em Inglês | MEDLINE | ID: mdl-33861979

RESUMO

OBJECTIVE: Public reporting is a policy to improve quality and increase data transparency. The objective was to examine the association between publicly available staffing ratios and the Five-Star Quality Ratings from Nursing Home Compare over time. DESIGN: Panel data analysis. SETTING AND PARTICIPANTS: About 146 nursing homes with complete quarterly data in New Jersey between January 1, 2012, and December 31, 2019. METHODS: Using data from the State of New Jersey Department of Health and Nursing Home Compare, staff-to-resident ratios were trended for registered nurses, licensed practical nurses, and certified nursing assistants by shift and over time. Panel data analysis was used to test the association between the ratios and the ratings. RESULTS: Compared to 2012, staffing ratios improved slightly for licensed practical nurses but not for registered nurses or certified nursing assistants in 2019 (P < .001). The number of residents assigned doubled at night for all personnel. During the day and evening shifts, registered nurse staffing was significantly associated with the Nursing Home Compare staffing rating (P < .01) but not the overall rating. CONCLUSIONS AND IMPLICATIONS: Decreasing the number of residents assigned to a registered nurse in NHs results in an increase in staffing ratings. Mandatory public reporting holds nursing homes accountable for quality outcomes but does not improve staffing ratios. Quality resident care is the cumulative result of multiple measures inclusive of staffing; therefore, administrators should continue to focus on improving quality in NHs, which may improve staffing ratios across shifts.


Assuntos
Assistentes de Enfermagem , Casas de Saúde , Humanos , Admissão e Escalonamento de Pessoal , Qualidade da Assistência à Saúde , Instituições de Cuidados Especializados de Enfermagem , Recursos Humanos
17.
Public Health Nurs ; 38(4): 610-626, 2021 07.
Artigo em Inglês | MEDLINE | ID: mdl-33715193

RESUMO

Public health emergencies threaten the lives of U.S. citizens, often in disproportionate ways. Hardest hit are vulnerable populations of older adults (OAs) residing in nursing homes (NHs), who comprised nearly 43% of all deaths from COVID-19 in NHs in 2020. New Jersey (NJ) ranks #2 nationally behind New York with the highest numbers of resident deaths; more than 50% of all COVID-19-related deaths in NJ have occurred in NHs. This public health emergency has prompted investigators to evaluate existing structural, resident, process of care, regulatory, and policy characteristics that have impacted the delivery of nursing care within NJ NHs. In this manuscript, we discuss data from NJ NHs during COVID-19, drawing from publicly available data, state reports, and the geriatric literature to offer recommendations. Based on evidence-based practices (EBPs), we present a series of recommendations to modify existing contextual factors in NHs to best prepare for the next health disaster.


Assuntos
COVID-19/enfermagem , Cuidados de Enfermagem/organização & administração , Casas de Saúde , Idoso , COVID-19/epidemiologia , Humanos , New Jersey/epidemiologia
18.
JBI Evid Synth ; 18(6): 1278-1284, 2020 06.
Artigo em Inglês | MEDLINE | ID: mdl-32813375

RESUMO

OBJECTIVE: The objective of this qualitative systematic review is to examine the available evidence on the experiences of nurses working the night shift within any specialty in the acute care, subacute, or long-term care setting. INTRODUCTION: Nurses are required for round-the-clock patient care, and night shift nurses can experience detrimental effects as a result of their work hours. Understanding nurses' experiences when working night shift will facilitate the development of strategies to minimize the potential negative effects of working at night. In examining nurses' perceptions of working night shift, there is scope to explore how to improve night shift nurses' practice environment and job satisfaction, which will then translate to improved patient outcomes. INCLUSION CRITERIA: This review will consider qualitative studies that include registered nurses and licensed practical nurses who work night shift or rotate between day and night shift. Night supervisors and advanced practice nurses will be excluded due to the potential for dissimilar experiences and resources within those groups. The search will be limited to studies published in English from 1983 to the present. METHODS: The search strategy is designed to locate both published and unpublished qualitative studies by searching academic databases for published studies, gray literature, and hand searching reference lists. The study selection, critical appraisal, data extraction, and synthesis for this systematic review will be conducted in accordance with the JBI methodology for systematic reviews of qualitative evidence. SYSTEMATIC REVIEW REGISTRATION NUMBER: PROSPERO CRD42019135294.


Assuntos
Satisfação no Emprego , Percepção , Humanos , Pesquisa Qualitativa , Literatura de Revisão como Assunto , Revisões Sistemáticas como Assunto
19.
J Pediatr Oncol Nurs ; 37(6): 349-358, 2020.
Artigo em Inglês | MEDLINE | ID: mdl-32441561

RESUMO

The purpose of this study, a secondary analysis of a publicly available database, was to identify racial and ethnic disparities in the risk of severe sepsis facing children undergoing the intensive therapy necessary to treat acute myeloid leukemia (AML). The sample consisted of 1,913 hospitalizations of children, younger than 21 years, in the United States during the year 2016 with documentation of both AML and at least one infectious complication. Binary logistic regression models were used to examine the association between race/ethnicity and severe sepsis in children with AML and infection. We found that, after controlling for potential confounding variables, the odds of developing severe sepsis were significantly increased for Hispanic children compared with White children. There were no significant differences in the likelihood of the development of sepsis in Black, Asian, or other race children. The increased risk of severe sepsis for Hispanic children may contribute to the disparate rates of overall survival in this group. This inequitable rate of severe sepsis was evident despite the generally accepted practice of retaining children in the hospital throughout recovery of blood counts following AML therapy. Nurses are in a position to identify and eliminate modifiable risk factors contributing to this disparity.


Assuntos
Disparidades em Assistência à Saúde/estatística & dados numéricos , Hispânico ou Latino/estatística & dados numéricos , Leucemia Mieloide Aguda/complicações , Leucemia Mieloide Aguda/mortalidade , Leucemia Mieloide Aguda/fisiopatologia , Sepse/etiologia , Sepse/fisiopatologia , Adolescente , Adulto , Negro ou Afro-Americano/estatística & dados numéricos , Criança , Pré-Escolar , Feminino , Disparidades em Assistência à Saúde/etnologia , Humanos , Leucemia Mieloide Aguda/etnologia , Modelos Logísticos , Masculino , Fatores de Risco , Sepse/etnologia , Estados Unidos/etnologia , População Branca/estatística & dados numéricos , Adulto Jovem
20.
mSphere ; 5(2)2020 04 01.
Artigo em Inglês | MEDLINE | ID: mdl-32238568

RESUMO

Xanthophyllomyces dendrorhous is a carotenogenic yeast with a singular metabolic capacity to produce astaxanthin, a valuable antioxidant pigment. This yeast can assimilate several carbon sources and sustain fermentation even under aerobic conditions. Since astaxanthin biosynthesis is affected by the carbon source, the study of carotenogenesis regulatory mechanisms is key for improving astaxanthin yield in X. dendrorhous This study aimed to elucidate the regulation of the metabolism of different carbon sources and the phenomenon of catabolic repression in this yeast. To this end, protein and transcript levels were quantified by iTRAQ (isobaric tags for relative and absolute quantification) and transcriptomic sequencing (RNA-seq) in the wild-type strain under conditions of glucose, maltose, or succinate treatment and in the mutant strains for genes MIG1, CYC8, and TUP1 under conditions of glucose treatment. Alternative carbon sources such as maltose and succinate affected the relative abundances of 14% of the wild-type proteins, which were mainly grouped into the carbohydrate metabolism category, with the glycolysis/gluconeogenesis and citrate cycle pathways being the most highly represented pathways. Each mutant strain showed significant proteomic profile changes, affecting approximately 2% of the total proteins identified, compared to the wild-type strain under glucose treatment conditions. Similarly to the results seen with the alternative carbon sources, the changes in the mutant strains mainly affected carbohydrate metabolism, with glycolysis/gluconeogenesis and the pentose phosphate and citrate cycle pathways being the most highly represented pathways. Our results showed convergence between carbon assimilation and catabolic repression in the strains studied. Interestingly, indications of cooperative, opposing, and overlapping processes during catabolic regulation were found. We also identified target proteins of the regulatory processes, reinforcing the likelihood of catabolic repression at the posttranscriptional level.IMPORTANCE The conditions affecting catabolic regulation in X. dendrorhous are complex and suggest the presence of an alternative mechanism of regulation. The repressors Mig1, Cyc8, and Tup1 are essential elements for the regulation of the use of glucose and other carbon sources. All play different roles but, depending on the growth conditions, can work in convergent, synergistic, and complementary ways to use carbon sources and to regulate other targets for yeast metabolism. Our results reinforced the belief that further studies in X. dendrorhous are needed to clarify a specific regulatory mechanism at the domain level of the repressors as well as its relationship with those of other metabolic repressors, i.e., the stress response, to elucidate carotenogenic regulation at the transcriptomic and proteomic levels in this yeast.


Assuntos
Basidiomycota/metabolismo , Carbono/metabolismo , Regulação Fúngica da Expressão Gênica , Basidiomycota/genética , Metabolismo dos Carboidratos , Proteínas Fúngicas/genética , Proteínas Fúngicas/metabolismo , Proteômica , Proteínas Repressoras/genética , Proteínas Repressoras/metabolismo
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