Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 926
Filtrar
1.
Glob Ment Health (Camb) ; 11: e32, 2024.
Artigo em Inglês | MEDLINE | ID: mdl-38572247

RESUMO

As evidence supporting the effectiveness of mental health and psychosocial interventions grows, more research is needed to understand optimal strategies for improving their implementation in diverse contexts. We conducted a qualitative process evaluation of a multicomponent psychosocial intervention intended to promote well-being among refugee, migrant and host community women in three diverse contexts in Ecuador and Panamá. The objective of this study is to describe the relationships among implementation determinants, strategies and outcomes of this community-based psychosocial intervention. The five implementation strategies used in this study included stakeholder engagement, promoting intervention adaptability, group and community-based delivery format, task sharing and providing incentives. We identified 10 adaptations to the intervention and its implementation, most of which were made during pre-implementation. Participants (n = 77) and facilitators (n = 30) who completed qualitative interviews reported that these strategies largely improved the implementation of the intervention across key outcomes and aligned with the study's intervention and implementation theory of change models. Participants and facilitators also proposed additional strategies for improving reach, implementation and maintenance of this community-based psychosocial intervention.

2.
Infect Control Hosp Epidemiol ; : 1-5, 2024 Apr 24.
Artigo em Inglês | MEDLINE | ID: mdl-38654493

RESUMO

OBJECTIVE: To determine prevalence of technical and behavioral interventions aimed at preventing central line-associated bloodstream infection (CLABSI) following the COVID19 pandemic. DESIGN: Cross-sectional survey. SETTING: US acute care hospitals. PARTICIPANTS: Infection preventionists at participating hospitals. METHODS: Surveys were sent to infection preventionists from a national random sample of 881 US acute care hospitals. Questions covered use of technical interventions to prevent CLABSI (eg, alcohol-containing chlorhexidine gluconate [CHG] for skin antisepsis, use of coated catheters), socio-adaptive interventions (eg, feedback of CLABSI rates, use of appropriateness criteria), and leadership support for CLABSI prevention. RESULTS: Survey response rate was 47% (415/881). Technical interventions such as maximal sterile barriers (99%) or CHG-impregnated dressings (92%) were highly prevalent, but routine use of CHG bathing was less common (68% indicated regular use in intensive care unit [ICU] vs 18% in non-ICU settings). Although 97% of respondents indicated use of systems to monitor CLABSI, feedback to providers on CLABSI events was reported by 89%. Only 53% of respondents indicated regular use of tools to determine appropriateness of central venous catheters (CVC). Three-quarters of respondents indicated their hospital assessed CVC necessity daily, but only 23% reported strategies to reduce routine blood cultures. CLABSI prevention was extremely important to hospital leadership at 82% of responding hospitals. CONCLUSIONS: Most US hospitals continue to use evidence-based methods to prevent CLABSI as recommended by leading organizations. Opportunities to focus on socio-adaptive interventions such as feedback of infection rates, use of appropriateness criteria for CVC placement, and improving the "culture of pan-culturing" remain.

3.
Artigo em Inglês | MEDLINE | ID: mdl-38673310

RESUMO

Research on mental health and psychosocial support (MHPSS) interventions within refugee and migrant communities has increasingly focused on evaluating implementation, including identifying strategies to promote retention in services. This study examines the relationship between participant characteristics, study setting, and reasons for intervention noncompletion using data from the Entre Nosotras feasibility trial, a community-based MHPSS intervention targeting refugee, migrant, and host community women in Ecuador and Panama that aimed to promote psychosocial wellbeing. Among 225 enrolled women, approximately half completed the intervention, with varying completion rates and reasons for nonattendance across study sites. Participants who were older, had migrated for family reasons, had spent more time in the study community, and were living in Panamá (vs. Ecuador) were more likely to complete the intervention. The findings suggest the need to adapt MHPSS interventions to consider the duration of access to the target population and explore different delivery modalities including the role of technology and cellular devices as reliable or unreliable source for engaging with participants. Engaging younger, newly arrived women is crucial, as they showed lower completion rates. Strategies such as consulting scheduling preferences, providing on-site childcare, and integrating MHPSS interventions with other programs could enhance intervention attendance.


Assuntos
Saúde Mental , Refugiados , Humanos , Feminino , Refugiados/psicologia , Adulto , Pessoa de Meia-Idade , Equador , Migrantes/psicologia , Migrantes/estatística & dados numéricos , Adulto Jovem , Panamá , Sistemas de Apoio Psicossocial , Apoio Social , América Latina
4.
Artigo em Inglês | MEDLINE | ID: mdl-38673293

RESUMO

There is increasing guidance promoting the provision of mental health and psychosocial support programs to both migrant and host community members in humanitarian settings. However, there is a lack of information on the respective experiences and benefits for migrant and host community members who are participating in mental health and psychosocial support programming. We evaluated a community-based psychosocial program for migrant and host community women, Entre Nosotras, which was implemented with an international non-governmental organization in Ecuador in 2021. Data on participant characteristics and psychosocial wellbeing were collected via pre/post surveys with 143 participants, and qualitative interviews were conducted with a subset (n = 61) of participants. All quantitative analyses were conducted in STATA, and qualitative analysis was done in NVivo. Attendance was higher for host community members. Specifically, 71.4% of host community members attended 4-5 sessions, whereas only 37.4% of migrants attended 4-5 sessions (p = 0.004). Qualitative analysis shows that the intervention was less accessible for migrants due to a variety of structural barriers. However, this analysis also demonstrated that both groups of women felt a greater sense of social connectedness after participating in the program and expressed gratitude for the bonds they formed with other women. Some migrant women described negative experiences with the host community because they felt as though they could not confide in host community women and speak freely in front of them. These results underscore how the migratory context influences the implementation of mental health and psychosocial support (MHPSS) programs. As humanitarian guidelines continue to emphasize the integration of host community members and displaced persons, it is critical to account for how the same intervention may impact these populations differently.


Assuntos
Intervenção Psicossocial , Migrantes , Humanos , Equador , Feminino , Adulto , Migrantes/psicologia , Migrantes/estatística & dados numéricos , Pessoa de Meia-Idade , Adulto Jovem , Saúde Mental , Acessibilidade aos Serviços de Saúde
5.
Artigo em Inglês | MEDLINE | ID: mdl-38415096

RESUMO

In a national survey of lead infection preventionists in Thai hospitals, spiritual and religious importance were associated with increased odds of career satisfaction. Cultivating environments for spiritual, religious, and self-care practices within the clinical setting may help facilitate emotional well-being-and prevent burnout-among Thai healthcare workers.

6.
Artigo em Inglês | MEDLINE | ID: mdl-38397657

RESUMO

Refugees and migrants experience an elevated risk for mental health problems and face significant barriers to receiving services. Interpersonal counseling (IPC-3) is a three-session intervention that can be delivered by non-specialists to provide psychological support and facilitate referrals for individuals in need of specialized care. We piloted IPC-3 delivered remotely by eight Venezuelan refugee and migrant women living in Peru. These counselors provided IPC-3 to Venezuelan refugee and migrant clients in Peru (n = 32) who reported psychological distress. Clients completed assessments of mental health symptoms at baseline and one-month post-intervention. A subset of clients (n = 15) and providers (n = 8) completed post-implementation qualitative interviews. Results showed that IPC-3 filled a gap in the system of mental health care for refugees and migrants in Peru. Some adaptations were made to IPC-3 to promote its relevance to the population and context. Non-specialist providers developed the skills and confidence to provide IPC-3 competently. Clients displayed large reductions in symptoms of depression (d = 1.1), anxiety (d = 1.4), post-traumatic stress (d = 1.0), and functional impairment (d = 0.8). Remote delivery of IPC-3 by non-specialists appears to be a feasible, acceptable, and appropriate strategy to address gaps and improve efficiency within the mental health system and warrants testing in a fully powered effectiveness study.


Assuntos
COVID-19 , Refugiados , Migrantes , Humanos , Feminino , Refugiados/psicologia , Projetos Piloto , Peru/epidemiologia , Pandemias , COVID-19/epidemiologia , Aconselhamento
7.
J Subst Use Addict Treat ; 157: 209288, 2024 02.
Artigo em Inglês | MEDLINE | ID: mdl-38176526

RESUMO

INTRODUCTION: Prior research has found that different ways of describing opioid-related impairment influences the types and degrees of stigmatizing beliefs held by the American public. In this study we examined the extent to which different characteristics of the American public (i.e., age, gender, race/ethnicity, religiosity, sexual orientation, political affiliation, personal history of addiction/mental health problem) are associated with holding different types and degrees of stigmatizing beliefs when asked to consider someone treated for opioid-related impairment. We also assessed whether any observed differences in stigmatizing beliefs related to participant characteristics are dependent on how an opioid-impaired patient is described in terms of both the nature of the impairment (e.g., as a "chronically relapsing brain disease", "brain disease", "disease", "illness", "disorder", or "problem") as well as the gender of the depicted opioid-impaired person. METHODS: A nationally representative sample of the U.S. population (N = 3643) was randomized to one of six vignettes describing a patient being treated for opioid-related impairment that differed only in the way the impairment was described (as a "chronically relapsing brain disease", "brain disease", "disease", "illness", "disorder", or "problem"). Participants subsequently were asked to rate statements assessing five stigma dimensions (blame, prognostic pessimism, continuing care, dangerousness, and social distance). RESULTS: Several characteristics were associated with different types and higher levels of stigmatizing beliefs: older age, male gender, White race, heterosexual orientation, being religious, Republican political affiliation, and having no prior alcohol/drug or mental health problem history (ps < 0.001). With very few exceptions, the way the opioid-impairment was described or whether the depicted patient was a man or a woman did not influence the strength of these associations. CONCLUSIONS: Certain characteristics of members of the US population were associated with holding different types and degrees of stigmatizing attitudes when asked to consider someone receiving treatment for opioid-related impairment and these were largely unaffected by how the impairment was labeled or the opioid-impaired person's gender. Depending on the specific target of clinical and public health anti-stigma campaigns, both addiction terminology and the beliefs held by certain population sub-groups will need to be considered when creating opioid use disorder related anti-stigma campaigns.


Assuntos
Comportamento Aditivo , Encefalopatias , Humanos , Masculino , Feminino , Analgésicos Opioides , Estereotipagem , Estigma Social , Comportamento Aditivo/psicologia
8.
Addict Behav Rep ; 19: 100527, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38226009

RESUMO

Purpose: Sexual minority (SM; e.g., gay, lesbian, bisexual) individuals are disproportionately impacted by alcohol and other drug (AOD) use disorders and psychosocial factors that can exacerbate AOD use disorders and hinder recovery. This study examines SM sub-group differences (monosexual [gay/lesbian] versus bisexual) regarding adaptation to recovery measured by indices of psychosocial functioning. Identifying differential needs of gay/lesbian versus bisexual individuals could improve services to better meet the needs of SM individuals in recovery. Methods: Using data from the National Recovery Study, a nationally representative cross-sectional sample of US adults who reported resolving an AOD problem (N = 2,002), we compared heterosexual to monosexual and bisexual SM individuals on socio-demographic characteristics, AOD use and treatment, and psychosocial variables. Results: Bisexual individuals were significantly younger than heterosexual individuals (p = .002 and p ≤ 0.001 among men and women, respectively) and reported significantly fewer years since AOD problem resolution compared to heterosexual individuals (p = .004 and p = .003 among men and women, respectively). Most notably, bisexual individuals, but not gay/lesbian individuals, reported significantly lower quality of life (QOL), happiness, self-esteem, and significantly higher distress compared to heterosexual individuals. Conclusion: Bisexual, but not monosexual, SM individuals in recovery from an AOD use disorder, were younger and reported worse psychosocial functioning than heterosexual individuals. Findings highlight significant differences between monosexual versus bisexual identified individuals with a notable disadvantage experienced by bisexual individuals. More needs to be learned about the challenges faced by bisexual individuals in recovery to better address their needs and support long-term AOD recovery.

9.
Alcohol Clin Exp Res (Hoboken) ; 48(3): 545-555, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-38246752

RESUMO

BACKGROUND: Mutual-help organizations (MHOs) are effective community-based, recovery support options for individuals with alcohol and other drug use disorders (i.e., substance use disorder; SUD). Greater understanding of second-wave MHOs, such as SMART Recovery, can help build on existing research that has focused primarily on 12-step MHOs, such as Alcoholics Anonymous, to inform scientific, practice, and policy recommendations. METHODS: We conducted a secondary analysis of the National Recovery Study, a representative sample of US adults who resolved a substance use problem (N = 1984). Using survey-weighted estimates, we examined descriptive statistics for any lifetime, weekly lifetime, and past 90-day MHO attendance; we compared rates of 12-step and second-wave MHO attendance over time by descriptively examining distributions for calendar year of the first meeting attended. We also used two logistic regression models to examine demographic, substance use, clinical, and recovery-related correlates of weekly lifetime attendance separately for 12-step (n = 692) and second-wave MHOs (n = 32). RESULTS: For any attendance, 41.4% attended a 12-step MHO and 2.9% a second-wave MHO; for weekly attendance, 31.9% attended a 12-step MHO, and 1.7% a second-wave MHO. Two-thirds (64%) of initial second-wave attendance occurred between 2006 and 2017 compared to 22% of initial 12-step attendance during this time frame. Significant correlates of weekly 12-step MHO attendance included histories of SUD treatment and arrest. Significant correlates of weekly second-wave MHO attendance included Black identity (vs. White) and history of SUD medication. CONCLUSIONS: Attendance at second-wave MHOs is far less common than 12-step MHOs, but appears to be on the rise. Observed correlates of second-wave MHO attendance should be replicated in larger second-wave MHO samples before integrating these findings into best practices. Enhanced linkages from clinical and criminal justice settings to both second-wave and 12-step groups may help to "broaden the base" of MHOs.

10.
Open Forum Infect Dis ; 11(1): ofad620, 2024 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-38213633

RESUMO

In a cross-sectional survey of US acute care hospitals, antimicrobial stewardship programs were present in most Veterans Affairs and nonfederal hospitals but varied in team composition, scope, and impact. Diagnostic stewardship was common across hospitals. Veterans Affairs hospitals had increased reach in outpatient settings. Telestewardship remains an opportunity in all hospital systems.

11.
Am J Infect Control ; 52(4): 495-497, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-37944756

RESUMO

Our national cross-sectional survey of United States hospitals found greater implementation of contact precautions for multidrug-resistant organisms and a higher percentage reporting the use of supplemental no-touch disinfection devices among Veterans Affairs (VA) versus non-VA hospitals. Nationally coordinated infection prevention initiatives within the VA could account for these practice differences.


Assuntos
Doenças Transmissíveis , Veteranos , Humanos , Estados Unidos , Estudos Transversais , Controle de Infecções/métodos , Hospitais , United States Department of Veterans Affairs , Hospitais de Veteranos
12.
Am J Infect Control ; 52(2): 191-194, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37295675

RESUMO

BACKGROUND: Antimicrobial stewardship in Thailand has made major progress backed by a national strategic plan. The current study aimed to assess the antimicrobial stewardship program (ASP) composition, reach, and breadth, as well as urine culture stewardship in Thai hospitals. METHODS: We sent an electronic survey to 100 Thai hospitals between February 1, 2021 and August 31, 2021. This hospital sample represented 20 hospitals in each of Thailand's 5 geographical regions. RESULTS: The response rate was 100%. A total of 86 of 100 hospitals had an ASP. These were often multi-disciplinary in nature, with half including infectious disease-trained physicians and pharmacists, infection preventionists, and nursing staff. Urine culture stewardship protocols existed in 51% of hospitals. CONCLUSIONS: The national strategic plan in Thailand has allowed the country to stand up robust ASPs. Further research should examine the effectiveness of such programs and ways to expand them into other medical settings, like nursing homes, urgent care, and outpatient while continuing to grow telehealth and urine culture stewardship.


Assuntos
Anti-Infecciosos , Gestão de Antimicrobianos , Humanos , Tailândia , Gestão de Antimicrobianos/métodos , Hospitais , Inquéritos e Questionários , Antibacterianos/uso terapêutico
13.
Infect Control Hosp Epidemiol ; 45(3): 310-315, 2024 Mar.
Artigo em Inglês | MEDLINE | ID: mdl-37702064

RESUMO

OBJECTIVE: To explore infection preventionists' perceptions of hospital leadership support for infection prevention and control programs during the coronavirus disease 2019 (COVID-19) pandemic and relationships with individual perceptions of burnout, psychological safety, and safety climate. DESIGN: Cross-sectional survey, administered April through December 2021. SETTING: Random sample of non-federal acute-care hospitals in the United States. PARTICIPANTS: Lead infection preventionists. RESULTS: We received responses from 415 of 881 infection preventionists, representing a response rate of 47%. Among respondents, 64% reported very good to excellent hospital leadership support for their infection prevention and control program. However, 49% reported feeling burned out from their work. Also, ∼30% responded positively for all 7 psychological safety questions and were deemed to have "high psychological safety," and 76% responded positively to the 2 safety climate questions and were deemed to have a "high safety climate." Our results indicate an association between strong hospital leadership support and lower burnout (IRR, 0.61; 95% CI, 0.50-0.74), higher perceptions of psychological safety (IRR, 3.20; 95% CI, 2.00-5.10), and a corresponding 1.2 increase in safety climate on an ascending Likert scale from 1 to 10 (ß, 1.21; 95% CI, 0.93-1.49). CONCLUSIONS: Our national survey provides evidence that hospital leadership support may have helped infection preventionists avoid burnout and increase perceptions of psychological safety and safety climate during the COVID-19 pandemic. These findings aid in identifying factors that promote the well-being of infection preventionists and enhance the quality and safety of patient care.


Assuntos
Esgotamento Profissional , COVID-19 , Humanos , Estados Unidos/epidemiologia , COVID-19/prevenção & controle , Liderança , Pandemias/prevenção & controle , Cultura Organizacional , Estudos Transversais , Segurança Psicológica , Esgotamento Profissional/epidemiologia , Esgotamento Profissional/prevenção & controle , Esgotamento Profissional/psicologia , Hospitais , Inquéritos e Questionários
14.
Psychiatr Serv ; 75(1): 98-101, 2024 Jan 01.
Artigo em Inglês | MEDLINE | ID: mdl-37461818

RESUMO

A local insurgency has displaced many people in the northern Mozambican province of Cabo Delgado. The authors' global team (comprising members from Brazil, Mozambique, South Africa, and the United States) has been scaling up mental health services across the neighboring province of Nampula, Mozambique, now host to >200,000 displaced people. The authors describe how mental health services can be expanded by leveraging digital technology and task-shifting (i.e., having nonspecialists deliver mental health care) to address the mental health needs of displaced people. These methods can serve as a model for other researchers and clinicians aiming to address mental health needs arising from humanitarian disasters in low-resource settings.


Assuntos
Desastres , Serviços de Saúde Mental , Humanos , Saúde Mental , Moçambique , África do Sul
15.
Am J Infect Control ; 52(2): 246-248, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37625548

RESUMO

In national surveys of infection preventionists in Israel (n = 15), the United States (n = 415), and Thailand (n = 100), we found that views of organizational culture track well with these countries' cultural dimension scores of power distance and individualism. Our findings highlight the importance of considering cultural dimensions when implementing infection prevention efforts.


Assuntos
Comparação Transcultural , Cultura Organizacional , Humanos , Estados Unidos , Israel , Tailândia
17.
Am J Surg ; 228: 199-205, 2024 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-37798151

RESUMO

BACKGROUND: The effects of non-infectious urinary catheter-related complications such as measurements of indwelling urinary catheter overuse, catheter-related trauma, and urinary retention are not well understood. METHODS: This was a retrospective cohort study of 200 patients undergoing general surgery operations. Variables to measure urinary catheter use, trauma, and retention were developed, then surgical cases were abstracted. Inter- and intra-rater reliability were calculated for measure validation. RESULTS: 129 of 200 (65%) had an indwelling urinary catheter placed at the time of surgery. 32 patients (16%) had urinary retention, and variation was observed in the treatment of urinary retention. 12 patients (6%) had urinary trauma. Rater reliability was high (>90% agreement for all) for the dichotomous outcomes of urinary catheter use, urinary catheter-related trauma, and urinary retention. CONCLUSIONS: This study suggests a persistent high rate of catheter use, significant rates of urinary retention and trauma, and variation in the management of retention.


Assuntos
Retenção Urinária , Infecções Urinárias , Humanos , Retenção Urinária/etiologia , Retenção Urinária/terapia , Cateteres Urinários/efeitos adversos , Cateterismo Urinário , Estudos Retrospectivos , Reprodutibilidade dos Testes , Cateteres de Demora/efeitos adversos , Complicações Pós-Operatórias/etiologia , Infecções Urinárias/etiologia
18.
Am J Infect Control ; 52(6): 726-730, 2024 Jun.
Artigo em Inglês | MEDLINE | ID: mdl-38122935

RESUMO

BACKGROUND: The degree to which religiosity, spirituality, and self-care practices can improve well-being among infection preventionists is not well understood. METHODS: We surveyed infection preventionists from a random sample of United States hospitals in 2021. Multivariable logistic regression models were used to examine the associations between measures of spirituality, religiosity, and self-care and well-being. RESULTS: Our response rate was 47% (415/881). A total of 49% of respondents reported burnout, 17% reported increased feelings of uncaring, and 69% would choose to become an infection preventionist again. Most respondents found importance in spiritual well-being (88%), religious beliefs (82%), and self-care practices (87%). Spiritual well-being was associated with increased odds of choosing to become an infection preventionist again (odds ratio = 2.32, 95% confidence interval = 1.19-4.53, P = .01). DISCUSSION: Our national survey provides evidence that spiritual importance is associated with career satisfaction among infection preventionists. Our findings contribute to a general body of evidence suggesting spiritual importance may translate to higher flourishing and well-being via serving a higher purpose. CONCLUSIONS: Promoting spiritual well-being may positively influence career satisfaction and overall well-being among infection preventionists.


Assuntos
Autocuidado , Espiritualidade , Humanos , Estados Unidos , Masculino , Feminino , Inquéritos e Questionários , Autocuidado/psicologia , Adulto , Pessoa de Meia-Idade , Profissionais Controladores de Infecções/psicologia , Controle de Infecções/métodos
19.
BMJ Mil Health ; 2023 Nov 23.
Artigo em Inglês | MEDLINE | ID: mdl-38053275

RESUMO

INTRODUCTION: Military veterans are at greater risk for chronic medical conditions, many of which are associated with greater body mass index (BMI). Detrimental changes to diet and physical activity (PA) levels after separation from military service contribute to this disparity which may be mitigated by nutrition education (NE) during service. METHODS: We conducted a survey in student veterans attending two southeastern US universities to determine current nutrition knowledge and hypothesised that NE received during time of service would be associated with better current diet quality (DQ), PA and BMI. Food group knowledge (FGK), and nutrient knowledge, DQ measured by Healthy Eating Index (HEI), and PA reported in metabolic equivalent minutes per week (MET-min/week) were assessed using previously validated questionnaires. Height and weight were also self-reported to calculate BMI. Differences in these variables between NE groups were assessed using Mann-Whitney U tests. Change in DQ, PA and BMI were assessed with Wilcoxon signed rank tests. Stepwise backward regression analysis was used to identify significant predictors related to HEI and BMI status. RESULTS: Sixty-three out of 83 total responses were valid. Respondents were 60% male, 81% white, 43% and 27% served in the Army and Navy, respectively and 30% reported receiving NE while in the military. Veterans who received NE while serving did not have higher FGK, nutrition knowledge, current DQ, MET-min/week or BMI than their counterparts. Overall, respondents reported decreased MET-min/week (p<0.001), increased BMI (p=0.01) and no change in DQ. PA (p=0.014) and FGK (p<0.001) were significant predictors of current DQ, while no variables significantly predicted current BMI. CONCLUSIONS: Inverse relationships between BMI and PA were observed after separation from duty. These results warrant the development and implementation of effective lifestyle interventions in veterans to prevent chronic disease and improve quality of life.

20.
Front Mol Biosci ; 10: 1286890, 2023.
Artigo em Inglês | MEDLINE | ID: mdl-38028550

RESUMO

Introduction: microRNAs (miRNAs) are small non-coding RNAs that work at the posttranscriptional level to repress gene expression. Several miRNAs are preferentially expressed in skeletal muscle and participate in myogenesis. This research was conducted to alter endogenous miRNA expression in skeletal muscle to promote muscle hypertrophy. Methods: Two experiments were conducted using mimic/agomiR or antagomir technologies to alter miRNA expression and examine changes in myoblast proliferation in vitro (experiment 1) and muscle hypertrophy in vivo (experiment 2). In vitro experiments found that antagomiR-22-3p and mimic-127 increased myoblast proliferation compared to other miRNA treatments or controls. These miRNA treatments, antagomiR-22-3p (ANT22) and agomiR-127 (AGO127), were then used for intramuscular injections in longissimus muscle. Results and discussion: The use of antagomiR or mimic/agomiR treatments down-regulated or up-regulated, respectively, miRNA expression for that miRNA of interest. Expression of predicted target KIF3B mRNA for miR-127 was up-regulated and ACVR2a mRNA was up-regulated for miR-22-3p. ANT22 injection also up-regulated the major regulator of protein synthesis (mTOR). Proteomic analyses identified 11 proteins for AGO127 and 9 proteins for ANT22 that were differentially expressed. Muscle fiber type and cross-sectional area were altered for ANT22 treatments to transition fibers to a more oxidative state. The use of agomiR and antagomir technologies allows us to alter miRNA expression in vitro and in vivo to enhance myoblast proliferation and alter muscle fiber hypertrophy in IUGR lambs during early postnatal growth.

SELEÇÃO DE REFERÊNCIAS
DETALHE DA PESQUISA
...