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1.
J Mol Cell Cardiol ; 187: 101-117, 2024 02.
Artigo em Inglês | MEDLINE | ID: mdl-38331556

RESUMO

AIMS: The sympathetic nervous system regulates numerous critical aspects of mitochondrial function in the heart through activation of adrenergic receptors (ARs) on cardiomyocytes. Mounting evidence suggests that α1-ARs, particularly the α1A subtype, are cardioprotective and may mitigate the deleterious effects of chronic ß-AR activation by shared ligands. The mechanisms underlying these adaptive effects remain unclear. Here, we tested the hypothesis that α1A-ARs adaptively regulate cardiomyocyte oxidative metabolism in both the uninjured and infarcted heart. METHODS: We used high resolution respirometry, fatty acid oxidation (FAO) enzyme assays, substrate-specific electron transport chain (ETC) enzyme assays, transmission electron microscopy (TEM) and proteomics to characterize mitochondrial function comprehensively in the uninjured hearts of wild type and α1A-AR knockout mice and defined the effects of chronic ß-AR activation and myocardial infarction on selected mitochondrial functions. RESULTS: We found that isolated cardiac mitochondria from α1A-KO mice had deficits in fatty acid-dependent respiration, FAO, and ETC enzyme activity. TEM revealed abnormalities of mitochondrial morphology characteristic of these functional deficits. The selective α1A-AR agonist A61603 enhanced fatty-acid dependent respiration, fatty acid oxidation, and ETC enzyme activity in isolated cardiac mitochondria. The ß-AR agonist isoproterenol enhanced oxidative stress in vitro and this adverse effect was mitigated by A61603. A61603 enhanced ETC Complex I activity and protected contractile function following myocardial infarction. CONCLUSIONS: Collectively, these novel findings position α1A-ARs as critical regulators of cardiomyocyte metabolism in the basal state and suggest that metabolic mechanisms may underlie the protective effects of α1A-AR activation in the failing heart.


Assuntos
Contração Miocárdica , Infarto do Miocárdio , Animais , Camundongos , Ácidos Graxos/metabolismo , Camundongos Knockout , Mitocôndrias/metabolismo , Infarto do Miocárdio/metabolismo , Estresse Oxidativo , Receptores Adrenérgicos alfa 1/metabolismo
2.
BMC Med Res Methodol ; 24(1): 68, 2024 Mar 17.
Artigo em Inglês | MEDLINE | ID: mdl-38494501

RESUMO

BACKGROUND: The challenging nature of studies with incarcerated populations and other offender groups can impede the conduct of research, particularly that involving complex study designs such as randomised control trials and clinical interventions. Providing an overview of study designs employed in this area can offer insights into this issue and how research quality may impact on health and justice outcomes. METHODS: We used a rule-based approach to extract study designs from a sample of 34,481 PubMed abstracts related to epidemiological criminology published between 1963 and 2023. The results were compared against an accepted hierarchy of scientific evidence. RESULTS: We evaluated our method in a random sample of 100 PubMed abstracts. An F1-Score of 92.2% was returned. Of 34,481 study abstracts, almost 40.0% (13,671) had an extracted study design. The most common study design was observational (37.3%; 5101) while experimental research in the form of trials (randomised, non-randomised) was present in 16.9% (2319). Mapped against the current hierarchy of scientific evidence, 13.7% (1874) of extracted study designs could not be categorised. Among the remaining studies, most were observational (17.2%; 2343) followed by systematic reviews (10.5%; 1432) with randomised controlled trials accounting for 8.7% (1196) of studies and meta-analysis for 1.4% (190) of studies. CONCLUSIONS: It is possible to extract epidemiological study designs from a large-scale PubMed sample computationally. However, the number of trials, systematic reviews, and meta-analysis is relatively small - just 1 in 5 articles. Despite an increase over time in the total number of articles, study design details in the abstracts were missing. Epidemiological criminology still lacks the experimental evidence needed to address the health needs of the marginalized and isolated population that is prisoners and offenders.


Assuntos
Criminosos , Prisioneiros , Humanos , Mineração de Dados , Projetos de Pesquisa
3.
Palliat Med ; : 2692163241234004, 2024 Mar 14.
Artigo em Inglês | MEDLINE | ID: mdl-38483052

RESUMO

BACKGROUND: Growing global demand for palliative care services has prompted generalist clinicians to provide adjunct support to specialist teams. Paramedics are uniquely placed to respond to these patients in the community. However, embedding palliative care principles into their core business will require multifactorial interventions at structural, healthcare service and individual clinician and consumer levels. AIM: To develop a palliative paramedicine framework suitable for national implementation, to standardise best practice in Australia. DESIGN: Delphi study utilising questionnaire completion; each round informed the need for, and content of, the next round. Free text comments were also sought in Round 1. Two rounds of Delphi were undertaken. SETTING/PARTICIPANTS: Sixty-eight participants took part in Round 1, representing six countries, and 66 in Round 2. Participants included paramedics, palliative care doctors and nurses, general practitioners, researchers and carers with lived experience and expertise in palliative paramedicine. RESULTS: Seventeen of the original 24 components gained consensus; 6 components were modified; and 9 new components arose from Round 1. All modified and new components gained consensus in Round 2. Only one original component did not gain consensus across both rounds and was excluded from the final 32-component framework. CONCLUSION: This study has developed a comprehensive national framework addressing the macro-, meso- and micro-level interventions required to standardise palliative paramedicine across Australia. Future research ought to engage a multidisciplinary team to create an implementation strategy, addressing any perceived barriers, facilitators and challenges for applying the framework into policy and practice.

4.
Palliat Med ; 37(8): 1266-1279, 2023 09.
Artigo em Inglês | MEDLINE | ID: mdl-37452564

RESUMO

BACKGROUND: Paramedic practice is diversifying to accommodate evolving global health trends, including community paramedicine models and growing expertise in palliative and end-of-life care. However, despite palliative care specific clinical practice guidelines and existing training, paramedics still lack the skills, confidence and clinical support to provide this type of care. AIM: To elicit paramedics', palliative care doctors and nurses', general practitioners', residential aged care nurses' and bereaved families and carers' experiences, perspectives, and attitudes on the role, barriers and enablers of paramedics delivering palliative and end-of-life care in community-based settings. DESIGN: A qualitative study employing reflexive thematic analysis of data collected from semi-structured online interviews was utilised. SETTING/PARTICIPANTS: A purposive sample of 50 stakeholders from all Australian jurisdictions participated. RESULTS: Five themes were identified: positioning the paramedic (a dichotomy between the life saver and community responder); creating an identity (the trusted clinician in a crisis), fear and threat (feeling afraid of caring for the dying), permission to care (seeking consent to take a palliative approach) and the harsh reality (navigating the role in a limiting and siloed environment). CONCLUSION: Paramedics were perceived to have a revered public identity, shaped by their ability to fix a crisis. However, paramedics and other health professionals also expressed fear and vulnerability when taking a palliative approach to care. Paramedics may require consent to move beyond a culture of curative care, yet all participant groups recognised their important adjunct role to support community-based palliative care.


Assuntos
Cuidadores , Paramédico , Humanos , Idoso , Paramedicina , Austrália , Cuidados Paliativos , Pesquisa Qualitativa , Família
5.
Sex Health ; 20(4): 303-314, 2023 08.
Artigo em Inglês | MEDLINE | ID: mdl-37344218

RESUMO

BACKGROUND: It is unclear what factors are associated with sexually transmissible infections (STI) and HIV testing and diagnosis among justice-involved adolescents, and if these differ for Aboriginal or Torres Strait Islander peoples. METHODS: A cross-sectional survey of 465 justice-involved adolescents (aged 14-17years) from Australia was conducted between 2016 and 2018. Participants were asked about sexual behaviours, STI/HIV knowledge, and prior STI diagnoses and testing. RESULTS: Approximately 38% (n =130) of those sexually active had ever been screened for STI/HIV and 17.8% (n =23) had been diagnosed with an STI. No participant reported living with HIV. For Aboriginal participants, being male (aOR 3.6, 95% CI 1.3-10.1) and having under three sexual partners in the past 12months (aOR 3.1, 95% CI 1.2-8.0) was associated with never having had an STI/HIV test. For non-Aboriginal participants, being male (aOR 2.7, 95%CI 1.2-5.7), single (aOR 2.4, 95% CI 1.2-4.9), attending school (aOR 2.4, 95% CI 1.1-5.1), not having sought sexual health information (aOR 2.8, 95% CI 1.4-5.8), and having a lower STI/HIV knowledge score (aOR 2.3, 95% CI 1.1-5.0) were associated with never having had an STI/HIV test. Factors associated with STI diagnosis were non-heterosexual sexual orientation (aOR 5.6, 95% CI 1.1-28.2), transactional sex (aOR 11.2, 95% CI 3.0-41.3), and having sought sexual health information (aOR 3.5, 95% CI 1.0-12.5). CONCLUSIONS: Males, particularly Aboriginal male adolescents, should be engaged with sexual health promotion and testing services as soon as they come into contact with the justice system. Approaches should consider different cultural, gender and sexual orientations.


Assuntos
Infecções por HIV , Infecções Sexualmente Transmissíveis , Humanos , Masculino , Feminino , Adolescente , Estudos Transversais , Infecções Sexualmente Transmissíveis/diagnóstico , Infecções Sexualmente Transmissíveis/epidemiologia , Austrália/epidemiologia , Comportamento Sexual , Infecções por HIV/diagnóstico , Infecções por HIV/epidemiologia , Teste de HIV
6.
J Relig Health ; 62(1): 98-116, 2023 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-36402854

RESUMO

Chaplains are embedded in several ambulance services across Australia, however as Australia's religiosity is currently in decline and questions are being asked about retaining chaplains, little is actually known about their role and value within Ambulance services. The aim of this paper is to present the key findings from interviews with chaplains about their role and value of being ambulance chaplains. These findings are then compared with those of paramedics derived from an earlier phase of this study. Thirteen chaplains participated in semi-structured interviews, and data were analysed using framework analysis. The results indicated that ambulance chaplains provided paramedic-centred emotional and spiritual care through proactively and reactively supporting paramedics in their work. Chaplains saw value in their relational approach which facilitated trust and access, did not seek to 'fix' or diagnose but instead offered physical and emotional presence, and promoted supportive conversations. Chaplains and paramedics valued operationally trained and equipped ambulance chaplains who provided a relational, around the clock, 'frontline' staff support presence in paramedic workplaces, regardless of the paramedic's personal religious/spiritual beliefs.


Assuntos
Ambulâncias , Clero , Humanos , Clero/psicologia , Paramédico , Austrália , Emoções
7.
Bioconjug Chem ; 33(3): 473-485, 2022 03 16.
Artigo em Inglês | MEDLINE | ID: mdl-35224973

RESUMO

Exosomes or small extracellular vesicles (sEVs) are increasingly gaining attention for their potential as drug delivery systems and biomarkers of disease. Therefore, it is important to understand their in vivo biodistribution using imaging techniques that allow tracking over time and at the whole-body level. Positron emission tomography (PET) allows short- and long-term whole-body tracking of radiolabeled compounds in both animals and humans and with excellent quantification properties compared to other nuclear imaging techniques. In this report, we explored the use of [89Zr]Zr(oxinate)4 (a cell and liposome radiotracer) for direct and intraluminal radiolabeling of several types of sEVs, achieving high radiolabeling yields. The radiosynthesis and radiolabeling protocols were optimized for sEV labeling, avoiding sEV damage, as demonstrated using several characterizations (cryoEM, nanoparticle tracking analysis, dot blot, and flow cytometry) and in vitro techniques. Using pancreatic cancer sEVs (PANC1) in a healthy mouse model, we showed that it is possible to track 89Zr-labeled sEVs in vivo using PET imaging for at least up to 24 h. We also report differential biodistribution of intact sEVs compared to intentionally heat-damaged sEVs, with significantly reduced spleen uptake for the latter. Therefore, we conclude that 89Zr-labeled sEVs using this method can reliably be used for in vivo PET tracking and thus allow efficient exploration of their potential as drug delivery systems.


Assuntos
Vesículas Extracelulares , Neoplasias Pancreáticas , Animais , Linhagem Celular Tumoral , Vesículas Extracelulares/metabolismo , Camundongos , Neoplasias Pancreáticas/metabolismo , Tomografia por Emissão de Pósitrons/métodos , Distribuição Tecidual , Zircônio
8.
Age Ageing ; 51(10)2022 10 06.
Artigo em Inglês | MEDLINE | ID: mdl-36309975

RESUMO

BACKGROUND: sexuality, intimacy and relationship needs are often a neglected aspect of the care of older adults in residential care facilities. Improving awareness, knowledge and improving attitudes about these needs among care staff could enhance quality of care and lead to better outcomes for residents. OBJECTIVE: to evaluate the feasibility and acceptability of a co-designed education and training e-resource to help care staff support their residents' sexuality, intimacy and relationship needs. METHODS: we delivered the education and training e-resource to five UK care homes over a 6-month period in a pre-post mixed methods study using surveys, focus groups and individual interviews. RESULTS: fifty-nine members of staff from participating care homes undertook the education and training e-resource. 18/59 (31%) of participants completed all six modules and the pre-post surveys. Eleven participants participated in focus groups/interviews to explore experiences of using the e-resource. The e-resource was successfully implemented in the study homes and found to be acceptable. We found preliminary evidence of positive changes in staff attitudes. Factors that facilitated implementation included support from the care home manager. Barriers identified included IT infrastructure and technology. CONCLUSIONS: the findings provide initial evidence that a co-designed education and training e-resource raised awareness of, and improved attitudes towards, older adults' sexuality and intimacy needs. This work provides the foundation for a next phase to establish the effectiveness of the e-resource on staff practice and resident outcomes.


Assuntos
Instituição de Longa Permanência para Idosos , Sexualidade , Humanos , Idoso , Estudos de Viabilidade , Comportamento Sexual , Atitude do Pessoal de Saúde
9.
Prehosp Emerg Care ; 26(3): 355-363, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-33528288

RESUMO

Objectives: Environmental cleanliness of emergency ambulances may be associated with increased risk of healthcare acquired infection (HAI). Surface cleanliness, measured using adenosine triphosphate (ATP) testing, has been demonstrated to correlate with potentially harmful levels of microbial pathogens. In most ambulance services, environmental cleanliness of ambulances and the equipment within them is the responsibility of paramedics. In 2016 NSW Ambulance introduced the Make Ready Model (MRM), in which ambulances are systematically cleaned by non-clinical support staff at the end of each shift. This prospective study aimed to 1) provide a baseline level of ambulance cleanliness; and 2) compare the MRM to a standard cleaning model (SCM). Methods: A prospective comparative study was conducted comparing cleanliness of ambulances in the SCM to those in the MRM. Adenosine-triphosphate (ATP) bioluminescence testing was performed in a pseudo-randomised sample of ambulances. Six 'high touch' areas within each ambulance were systematically sampled. Testing occurred without warning to operational staff. The primary outcome was 'overall bioburden' (OB)' measured in radiant light units ('RLU'). Non-parametric tests were used to assess differences in RLU values between each of the test points, while Poisson multivariate regression was used to compare median overall bioburden between the two groups, adjusting for the confounder variable of 14-day ambulance workload. Results: Sixty-eight ambulances were sampled, 32 from the SCM and 36 from the MRM. Median surface bioburden was significantly lower in the MRM for four of the six test points (preparation table, mobile data terminal, stretcher handles and steering wheel). For the primary outcome of overall bioburden, the unadjusted MRM OB was 35% lower than for the SCM group (RR 0.65 (0.64-0.66; p < 0.01)). After adjusting for the significant confounding variable of 14-day workload, the OB was 38% lower for the MRM group (ARR 0.68 (0.61-0.63; p < 0.001)). Conclusion: The innovative MRM cleaning system was associated with significantly improved cleanliness in frontline emergency ambulances. The magnitude of improvement in cleanliness suggests this cleaning model has the potential to make a major contribution to infection control strategies in paramedicine. Future research should focus on cost effectiveness of the MRM and its applicability to regional and remote ambulance service operations.


Assuntos
Ambulâncias , Serviços Médicos de Emergência , Trifosfato de Adenosina/análise , Humanos , Controle de Infecções , Estudos Prospectivos
10.
J Minim Invasive Gynecol ; 29(2): 169-176, 2022 02.
Artigo em Inglês | MEDLINE | ID: mdl-34839061

RESUMO

OBJECTIVE: To review the available literature on the effect of cannabis-based products on the female reproductive system and establish whether there is any evidence that they benefit or harm patients with endometriosis and, therefore, whether there is sufficient evidence to recommend them. DATA SOURCES: An electronic-based search was performed in PubMed, Embase, and the Cochrane Database. Reference lists of articles retrieved were reviewed, and a gray literature search was also performed. METHODS OF STUDY SELECTION: The original database search yielded 264 articles from PubMed, Embase, and the Cochrane Database, of which 41 were included. One hundred sixty-one studies relating to gynecologic malignancy, conditions unrelated to endometriosis, or therapies unrelated to cannabis-based products were excluded. Twelve articles were included from a gray literature search and review of references. TABULATION, INTEGRATION, AND RESULTS: Most available evidence is from laboratory studies aiming to simulate the effects of cannabis-based products on preclinical endometriosis models. Some show evidence of benefit with cannabis-based products. However, results are conflicting, and the impact in humans cannot necessarily be extrapolated from these data. Few studies exist looking at the effect of cannabis or its derived products in women with endometriosis; the majority are in the form of surveys and are affected by bias. National guidance was also reviewed: at present, this dictates that cannabis-based products can only be prescribed for conditions in which there is clear published evidence of benefit and only when all other treatment options have been exhausted. CONCLUSION: Current treatment options for endometriosis often affect fertility and/or have undesirable side effects that impede long-term management. Cannabis-based products have been suggested as a novel therapeutic option that may circumvent these issues. However, there is a paucity of well-designed, robust studies and randomized controlled trials looking at their use in the treatment of endometriosis. In addition, cannabis use has a potential for harm in the long term, with a possible association with "cannabis use disorder," psychosis, and mood disturbances. At present, national guidance cannot recommend cannabis-based products to patients in the UK owing to lack of clear evidence of benefit. More comprehensive research into the impact of endocannabinoids in the context of endometriosis is required before their use can be recommended or prescribed.


Assuntos
Canabidiol , Dor Crônica , Endometriose , Canabidiol/uso terapêutico , Dor Crônica/tratamento farmacológico , Dor Crônica/etiologia , Endometriose/complicações , Endometriose/tratamento farmacológico , Feminino , Humanos , Dor Pélvica/complicações , Dor Pélvica/etiologia
11.
Emerg Med J ; 39(1): 57-62, 2022 Jan.
Artigo em Inglês | MEDLINE | ID: mdl-34289963

RESUMO

BACKGROUND: Globally, the measurement of quality is an important process that supports the provision of high-quality and safe healthcare services. The requirement for valid quality measurement to gauge improvements and monitor performance is echoed in the Australian prehospital care setting. The aim of this study was to use an evidence-informed expert consensus process to identify valid quality indicators (QIs) for Australian prehospital care provided by ambulance services. METHODS: A modified RAND/UCLA appropriateness method was conducted with a panel of Australian prehospital care experts from February to May 2019. The proposed QIs stemmed from a scoping review and were systematically prepared within a clinical and non-clinical classification system, and a structure/process/outcome and access/safety/effectiveness taxonomy. Rapid reviews were performed for each QI to produce evidence summaries for consideration by the panellists. QIs were deemed valid if the median score by the panel was 7-9 without disagreement. RESULTS: Of 117 QIs, the expert panel rated 84 (72%) as valid. This included 26 organisational/system QIs across 7 subdomains and 58 clinical QIs within 10 subdomains.Most QIs were process indicators (n=62; 74%) while QIs describing structural elements and desired outcomes were less common (n=13; 15% and n=9; 11%, respectively). Non-exclusively, 18 (21%) QIs addressed access to healthcare, 21 (25%) described safety aspects and 64 (76%) specified elements contributing to effective services and care. QIs on general time intervals, such as response time, were not considered valid by the panel. CONCLUSION: This study demonstrates that with consideration of best available evidence a substantial proportion of QIs scoped and synthesised from the international literature are valid for use in the Australian prehospital care context.


Assuntos
Serviços Médicos de Emergência , Indicadores de Qualidade em Assistência à Saúde , Austrália , Consenso , Atenção à Saúde , Humanos
12.
BMC Emerg Med ; 22(1): 144, 2022 08 09.
Artigo em Inglês | MEDLINE | ID: mdl-35945506

RESUMO

BACKGROUND: Research examining paramedic care of back pain is limited. OBJECTIVE: To describe ambulance service use and usual paramedic care for back pain, the effectiveness and safety of paramedic care of back pain, and the characteristics of people with back pain who seek care from paramedics. METHODS: We included published peer-reviewed studies of people with back pain who received any type of paramedic care on-scene and/or during transport to hospital. We searched MEDLINE, EMBASE, CINAHL, Web of Science and SciELO from inception to July 2022. Two authors independently screened and selected the studies, performed data extraction, and assessed the methodological quality using the PEDro, AMSTAR 2 and Hawker tools. This review followed the JBI methodological guidance for scoping reviews and PRISMA extension for scoping reviews. RESULTS: From 1987 articles we included 26 articles (25 unique studies) consisting of 22 observational studies, three randomised controlled trials and one review. Back pain is frequently in the top 3 reasons for calls to an ambulance service with more than two thirds of cases receiving ambulance dispatch. It takes ~ 8 min from time of call to an ambulance being dispatched and 16% of calls for back pain receive transport to hospital. Pharmacological management of back pain includes benzodiazepines, NSAIDs, opioids, nitrous oxide, and paracetamol. Non-pharmacological care is poorly reported and includes referral to alternate health service, counselling and behavioural interventions and self-care advice. Only three trials have evaluated effectiveness of paramedic treatments (TENS, active warming, and administration of opioids) and no studies provided safety or costing data. CONCLUSION: Paramedics are frequently responding to people with back pain. Use of pain medicines is common but varies according to the type of back pain and setting, while non-pharmacological care is poorly reported. There is a lack of research evaluating the effectiveness and safety of paramedic care for back pain.


Assuntos
Serviços Médicos de Emergência , Auxiliares de Emergência , Pessoal Técnico de Saúde , Ambulâncias , Dor nas Costas , Humanos , Encaminhamento e Consulta
13.
J Relig Health ; 61(2): 929-947, 2022 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-34694550

RESUMO

Chaplains are employed by ambulance services in many states across Australia as one element in a suite of initiatives to support the health and wellness of paramedics. The aim of this paper is to present key findings from a study that explored paramedic perspectives on the role and value of chaplains in the ambulance service. Seventeen paramedics participated in semi-structured interviews. Data were analysed using framework analysis. Two themes were identified: scope of the chaplain's role and organisational factors influencing the chaplain's role. Paramedics highly valued what they believed to be proactive and reactive support provided by ambulance chaplains, regardless of paramedics' personal spiritual or religious beliefs.


Assuntos
Clero , Auxiliares de Emergência , Pessoal Técnico de Saúde , Ambulâncias , Austrália , Humanos
14.
Mol Microbiol ; 113(1): 143-152, 2020 01.
Artigo em Inglês | MEDLINE | ID: mdl-31618483

RESUMO

Bacteriophage MS2 is a positive-sense, single-stranded RNA virus encapsulated in an asymmetric T = 3 pseudo-icosahedral capsid. It infects Escherichia coli through the F-pilus, in which it binds through a maturation protein incorporated into its capsid. Cryogenic electron microscopy has previously shown that its genome is highly ordered within virions, and that it regulates the assembly process of the capsid. In this study, we have assembled recombinant MS2 capsids with non-genomic RNA containing the capsid incorporation sequence, and investigated the structures formed, revealing that T = 3, T = 4 and mixed capsids between these two triangulation numbers are generated, and resolving structures of T = 3 and T = 4 capsids to 4 Å and 6 Å respectively. We conclude that the basic MS2 capsid can form a mix of T = 3 and T = 4 structures, supporting a role for the ordered genome in favouring the formation of functional T = 3 virions.


Assuntos
Proteínas do Capsídeo/ultraestrutura , Capsídeo/ultraestrutura , Levivirus/metabolismo , RNA Viral/ultraestrutura , Microscopia Crioeletrônica , Escherichia coli/virologia , Modelos Moleculares
15.
Am J Physiol Heart Circ Physiol ; 320(2): H725-H733, 2021 02 01.
Artigo em Inglês | MEDLINE | ID: mdl-33275531

RESUMO

α1-Adrenergic receptors (ARs) are catecholamine-activated G protein-coupled receptors (GPCRs) that are expressed in mouse and human myocardium and vasculature, and play essential roles in the regulation of cardiovascular physiology. Though α1-ARs are less abundant in the heart than ß1-ARs, activation of cardiac α1-ARs results in important biologic processes such as hypertrophy, positive inotropy, ischemic preconditioning, and protection from cell death. Data from the Antihypertensive and Lipid-Lowering Treatment to Prevent Heart Attack Trial (ALLHAT) indicate that nonselectively blocking α1-ARs is associated with a twofold increase in adverse cardiac events, including heart failure and angina, suggesting that α1-AR activation might also be cardioprotective in humans. Mounting evidence implicates the α1A-AR subtype in these adaptive effects, including prevention and reversal of heart failure in animal models by α1A agonists. In this review, we summarize recent advances in our understanding of cardiac α1A-ARs.


Assuntos
Doenças Cardiovasculares/metabolismo , Coração/inervação , Miocárdio/metabolismo , Receptores Adrenérgicos alfa 1/metabolismo , Sistema Nervoso Simpático/metabolismo , Agonistas de Receptores Adrenérgicos alfa 1/uso terapêutico , Antagonistas de Receptores Adrenérgicos alfa 1/efeitos adversos , Animais , Doenças Cardiovasculares/tratamento farmacológico , Doenças Cardiovasculares/fisiopatologia , Humanos , Receptores Adrenérgicos alfa 1/efeitos dos fármacos , Transdução de Sinais , Sistema Nervoso Simpático/fisiopatologia
16.
Circ Res ; 125(7): 699-706, 2019 09 13.
Artigo em Inglês | MEDLINE | ID: mdl-31426700

RESUMO

RATIONALE: Gq signaling in cardiac myocytes is classically considered toxic. Targeting Gq directly to test this is problematic, because cardiac myocytes have many Gq-coupled receptors. OBJECTIVE: Test whether Gq coupling is required for the cardioprotective effects of an alpha-1A-AR (adrenergic receptor) agonist. METHODS AND RESULTS: In recombinant cells, a mouse alpha-1A-AR with a 6-residue substitution in the third intracellular loop does not couple to Gq signaling. Here we studied a knockin mouse with this alpha-1A-AR mutation. Heart alpha-1A receptor levels and antagonist affinity in the knockin were identical to wild-type. In wild-type cardiac myocytes, the selective alpha-1A agonist A61603-stimulated phosphoinositide-phospholipase C and myocyte contraction. In myocytes with the alpha-1A knockin, both A61603 effects were absent, indicating that Gq coupling was absent. Surprisingly, A61603 activation of cardioprotective ERK (extracellular signal-regulated kinase) was markedly impaired in the KI mutant myocytes, and A61603 did not protect mutant myocytes from doxorubicin toxicity in vitro. Similarly, mice with the α1A KI mutation had increased mortality after transverse aortic constriction, and A61603 did not rescue cardiac function in mice with the Gq coupling-defective alpha-1A receptor. CONCLUSIONS: Gq coupling is required for cardioprotection by an alpha-1A-AR agonist. Gq signaling can be adaptive.


Assuntos
Agonistas de Receptores Adrenérgicos alfa 1/farmacologia , Cardiotônicos/farmacologia , Subunidades alfa Gq-G11 de Proteínas de Ligação ao GTP/metabolismo , Imidazóis/farmacologia , Miócitos Cardíacos/metabolismo , Receptores Adrenérgicos alfa 1/metabolismo , Tetra-Hidronaftalenos/farmacologia , Substituição de Aminoácidos , Animais , Células Cultivadas , Masculino , Camundongos , Camundongos Endogâmicos C57BL , Proteína Quinase 1 Ativada por Mitógeno/metabolismo , Proteína Quinase 3 Ativada por Mitógeno/metabolismo , Contração Miocárdica , Miócitos Cardíacos/efeitos dos fármacos , Miócitos Cardíacos/fisiologia , Fosfoinositídeo Fosfolipase C/metabolismo , Domínios Proteicos , Receptores Adrenérgicos alfa 1/química , Receptores Adrenérgicos alfa 1/genética , Transdução de Sinais
17.
Age Ageing ; 50(3): 758-771, 2021 05 05.
Artigo em Inglês | MEDLINE | ID: mdl-33681969

RESUMO

BACKGROUND: Having positive intimate, sexual and relational experiences is an important issue for older adults in care settings, yet little is known on the extent to which nursing staff and care workers have received education or training in addressing and meeting these needs among older residents. This scoping review aimed to identify and examine what education and training resources exist to assist nursing staff and care workers to meet their residents' needs in this area. METHODS AND ANALYSIS: Using the Arksey and O'Malley framework, we systematically searched papers and grey literature to identify education interventions and resources that aimed to facilitate care home staff to meet their residents' sexuality, intimacy and relational needs. RESULTS: Eleven studies (one dissertation) and three education resources met the inclusion criteria; most were conducted in the USA and Australia. Across the studies and resources identified, the education content was mixed and the methodology, presentation, design and duration varied widely. The focus of the education interventions and resources was to increase knowledge and improve and/or change attitudes towards the: (i) sexual expression of older people living in residential aged care, (ii) sexuality and ageing and (iii) expression of sexuality in people with dementia. CONCLUSION: Few education interventions and training resources were identified. The findings suggest that education interventions can improve knowledge and/or change care staff attitudes, in the short-term, towards older people's sexuality, intimacy and relational needs in care home settings, which can lead to facilitating staff to enhance person-centred care in this area of need.


Assuntos
Comportamento Sexual , Sexualidade , Idoso , Atitude do Pessoal de Saúde , Austrália , Humanos , Parceiros Sexuais
18.
Gerontol Geriatr Educ ; 42(3): 399-422, 2021.
Artigo em Inglês | MEDLINE | ID: mdl-33252017

RESUMO

Appropriately skilled staff are required to meet the health and care needs of aging populations yet, shared competencies for the workforce are lacking. This study aimed to develop multidisciplinary core competencies for health and aged care workers in Australia through a scoping review and Delphi survey. The scoping review identified 28 records which were synthesized through thematic analysis into draft domains and measurable competencies. Consensus was sought from experts over two Delphi rounds (n = 111 invited; n = 59 round one; n = 42 round two). Ten domains with 66 core competencies, to be interpreted and applied according to the worker's scope of practice were finalized. Consensus on multidisciplinary core competencies which are inclusive of a broad range of registered health professionals and unregistered aged care workers was achieved. Shared knowledge, attitudes, and skills across the workforce may improve the standard and coordination of person-centered, integrated care for older Australians from diverse backgrounds.


Assuntos
Geriatria , Idoso , Envelhecimento , Austrália , Competência Clínica , Técnica Delphi , Geriatria/educação , Humanos , Recursos Humanos
19.
BMC Pregnancy Childbirth ; 20(1): 600, 2020 Oct 07.
Artigo em Inglês | MEDLINE | ID: mdl-33028237

RESUMO

BACKGROUND: The aim of this national survey was to explore pregnant women's perceptions of COVID-19 and their healthcare experiences. METHODS: Through patient and public involvement, a questionnaire was developed and advertised via the BBC website, Twitter and other online media during May 2020. The findings were analysed by qualitative thematic analysis. Women who are currently pregnant, or who have delivered during the COVID-19 pandemic were invited to partake in a national online survey. RESULTS: One thousand four hundred fifty-one participants replied to the online questionnaire. Participants provided significant insight into the perceived barriers to seeking healthcare during this pandemic. These include 'not wanting to bother anyone', 'lack of wider support from allied healthcare workers' and the influence of the media. Other concerns included the use of virtual clinics antenatally and their acceptability to patients, the presence of birthing partners, and the way in which information is communicated about rapidly changing and evolving services. The influence of the media has also had a significant impact on the way women perceive hospital care in light of COVID-19 and for some, this has shaped whether they would seek help. CONCLUSIONS: This is the first ever reported study in the United Kingdom to explore pregnant women's perceptions of COVID-19 and their subsequent healthcare experiences. It has also provided insight into perceived barriers into seeking care as well as maternal concerns antenatally, intrapartum and postpartum.


Assuntos
Infecções por Coronavirus , Pandemias , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos , Pneumonia Viral , Complicações Infecciosas na Gravidez , Gestantes/psicologia , Percepção Social , Adulto , Atitude Frente a Saúde , Betacoronavirus , COVID-19 , Infecções por Coronavirus/epidemiologia , Infecções por Coronavirus/prevenção & controle , Infecções por Coronavirus/psicologia , Feminino , Humanos , Pandemias/prevenção & controle , Pneumonia Viral/epidemiologia , Pneumonia Viral/prevenção & controle , Pneumonia Viral/psicologia , Gravidez , Complicações Infecciosas na Gravidez/epidemiologia , Complicações Infecciosas na Gravidez/prevenção & controle , Complicações Infecciosas na Gravidez/psicologia , Pesquisa Qualitativa , SARS-CoV-2 , Inquéritos e Questionários , Reino Unido/epidemiologia
20.
Cult Health Sex ; 22(11): 1222-1234, 2020 11.
Artigo em Inglês | MEDLINE | ID: mdl-31596173

RESUMO

Many papers have been written on the process of coming out by individuals with predominantly same-sex sexual orientation but few of these papers have explored the concept of how people negotiate the idea of coming out in prison. We conducted in-depth interviews with 13 prisoners and one ex-prisoner in New South Wales, Australia, who self-identified as gay, homosexual or bisexual men. Data was collected and analysed using an inductive or grounded theory framework since very little was known on the sexual behaviours and identities of Australian prisoners prior to the study and elsewhere. We examined and discussed the lived experiences of prisoners whose disclosure stories were seen to fall under four thematic categories: 'coming out', 'forced out', 'going back in' and 'staying out of the closet' on entering prison. Respondents were required continuously and contextually to manage their sexual identities and disclosure to different audiences while incarcerated. Findings suggest that the prison environment and its attendant heteronormative values and hyper-masculine culture, apply significant pressure on gay and bisexual men on how to manage their sexual identities and disclose their sexuality in prison.


Assuntos
Bissexualidade/estatística & dados numéricos , Revelação , Prisioneiros/psicologia , Comportamento Sexual , Minorias Sexuais e de Gênero/estatística & dados numéricos , Sexualidade , Adulto , Austrália , Teoria Fundamentada , Humanos , Masculino , Pessoa de Meia-Idade , Prisões
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