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1.
BMC Health Serv Res ; 24(1): 205, 2024 Feb 15.
Artículo en Inglés | MEDLINE | ID: mdl-38355508

RESUMEN

To better understand the specific influences of early life on the long-term health and well-being of local Aboriginal children in Alice Springs, high-quality local longitudinal data is required. The Central Australian Aboriginal Congress and the Murdoch Children's Research Institute are exploring the feasibility of establishing a cohort study to fill this gap. A nested qualitative study was conducted to identify priority issues that can be translated into research questions answerable through the proposed cohort study. Semi-structured interviews and focus group discussions (FGDs) were conducted with a range of key community stakeholders, parents and caregivers of young Aboriginal children from Alice Springs in the Northern Territory between 2020 and 2021. Two Aboriginal and two non-Aboriginal researchers conducted 27 interviews and 3 FGDs with 42 participants. Three broad themes were constructed through reflexive thematic analysis representing the areas of focus community stakeholders and parents want future research to prioritise: (1) social determinants of health (2) building positive connections, and (3) making sure kids grow up strong and healthy. Priority setting for future research should be driven by Aboriginal and Torres Strait Islander peoples in order to be of practical benefit to their community. This qualitative study found that housing, transport and positive connections through nurturing and engaged parents were some of the most important issues raised. Participants also wanted future research to focus on issues specific to children such as nutrition, hearing loss, language development and capacity to learn. These findings will guide future work led by local Aboriginal researchers to co-design the proposed cohort study.


Asunto(s)
Aborigenas Australianos e Isleños del Estrecho de Torres , Servicios de Salud del Indígena , Niño , Humanos , Australia , Estudios de Cohortes , Investigación sobre Servicios de Salud , Investigación Cualitativa , Servicios de Salud
2.
J Racial Ethn Health Disparities ; 9(6): 2197-2207, 2022 12.
Artículo en Inglés | MEDLINE | ID: mdl-34595675

RESUMEN

BACKGROUND: Pregnancy can be a stressful time for many women. Australian Indigenous women of childbearing age (18-44 years) have been found to experience high or very high rates of psychological distress. However, few studies have examined the burden of or any associations between stressful life events, social disadvantage and psychological distress for pregnant Indigenous women in Australia. METHODS: Two hundred sixty-one rural and remote women, pregnant with an Indigenous infant, from New South Wales in Australia were invited to provide data regarding social disadvantage then complete the Kessler-10 and Stressful Life Events surveys via self-report during each trimester of their pregnancy. Descriptive statistics, Pearson's correlations, Mann-Whitney U and Kruskal-Wallis tests were performed to determine the burden of and any associations between the variables of interest. RESULTS: High rates of psychological distress were reported by participants with 16.9% scoring severe distress levels during their pregnancy. Participants also reported high rates of stressful life events with almost 25% experiencing the death of a family member or friend, almost 14% living in overcrowded accommodation, 11% having someone close to them jailed and 8% experience separation from their partner, during their pregnancies. Distress was associated with numerous stressful life events (e.g. witnessing violence, a family member in jail and overcrowding) and one aspect of social disadvantage (smoking status). CONCLUSIONS: Immediate attention needs to focus on the development of interventions to address the high levels of psychological distress and provide appropriate support services during periods of major life events for pregnant Australian Indigenous women.


Asunto(s)
Mujeres Embarazadas , Distrés Psicológico , Embarazo , Femenino , Humanos , Adolescente , Adulto Joven , Adulto , Mujeres Embarazadas/psicología , Estudios Longitudinales , Australia/epidemiología , Estrés Psicológico/psicología , Nativos de Hawái y Otras Islas del Pacífico , Estudios de Cohortes
3.
Int J Popul Data Sci ; 5(1): 1100, 2020 Mar 16.
Artículo en Inglés | MEDLINE | ID: mdl-32935045

RESUMEN

BACKGROUND: In the ongoing debate on optimum methods for identification of Indigenous people within linked administrative data, few studies have examined the impacts of method on population counts and outcomes in family-based linkage studies of Aboriginal children. OBJECTIVE: To quantify differences between three algorithms in ascertaining Aboriginal and Torres Strait Islander children in linked administrative data. METHODS: Linked administrative health data for children born in Western Australia (WA) from 2000-2013, were used to examine the cohorts identified by three methods: A) the Indigenous Status Flag (ISF, derived by the WA Data Linkage Branch using a multistage-median approach) for the children alone; B) the ISF of the children, their parents and grandparents; and C) Indigenous status of the child, mother or father on either of the child's perinatal records (Midwives or birth registration), to determine differing characteristics of each cohort. RESULTS: Method B established a larger cohort (33,489) than Method C (33,306) and Method A (27,279), with all methods identifying a core group of 26,790 children (80-98%). Compared with children identified by Method A, additional children identified by Methods B or C, were from less-disadvantaged and more urban areas, and had better perinatal outcomes (e.g. lower proportions of small-for-gestational age, 10% vs 16%). Differences in demographics and health outcomes between Methods C and B were minimal. CONCLUSIONS: Demographic and perinatal health characteristics differ by Aboriginal identification method. Using perinatal records or the ISF of parents and grandparents (in addition to the ISF of the child) appear to be more inclusive methods for identifying young Indigenous children in administrative datasets. KEYWORDS: Aboriginal health, identification, data linkage, Indigenous, child, methodology.

4.
J Dev Orig Health Dis ; 10(1): 31-38, 2019 02.
Artículo en Inglés | MEDLINE | ID: mdl-30651154

RESUMEN

Adverse pregnancy outcomes including prematurity and low birth weight (LBW) have been associated with life-long chronic disease risk for the infant. Stress during pregnancy increases the risk of adverse pregnancy outcomes. Many studies have reported the incidence of adverse pregnancy outcomes in Indigenous populations and a smaller number of studies have measured rates of stress and depression in these populations. This study sought to examine the potential association between stress during pregnancy and the rate of adverse pregnancy outcomes in Australian Indigenous women residing in rural and remote communities in New South Wales. This study found a higher rate of post-traumatic stress disorder, depression and anxiety symptoms during pregnancy than the general population. There was also a higher incidence of prematurity and LBW deliveries. Unfortunately, missing post-traumatic stress disorder and depressive symptomatology data impeded the examination of associations of interest. This was largely due to the highly sensitive nature of the issues under investigation, and the need to ensure adequate levels of trust between Indigenous women and research staff before disclosure and recording of sensitive research data. We were unable to demonstrate a significant association between the level of stress and the incidence of adverse pregnancy outcomes at this stage. We recommend this longitudinal study continue until complete data sets are available. Future research in this area should ensure prioritization of building trust in participants and overestimating sample size to ensure no undue pressure is placed upon an already stressed participant.


Asunto(s)
Nativos de Hawái y Otras Islas del Pacífico , Resultado del Embarazo/epidemiología , Estrés Fisiológico , Enfermedad Crónica , Femenino , Humanos , Recién Nacido de Bajo Peso , Estudios Longitudinales , Embarazo , Nacimiento Prematuro , Efectos Tardíos de la Exposición Prenatal
5.
Equine Vet J ; 51(1): 131-135, 2019 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-29758109

RESUMEN

BACKGROUND: Laminitis has a considerable impact on the equine industry. Endocrinopathic laminitis is the most common form and affected horses often have hyperinsulinaemia due to an underlying metabolic disorder. OBJECTIVES: The aim of this study was to determine if insulin weakens the structural integrity of digital lamellae and to develop an ex vivo model for the study of hyperinsulinaemia-induced lamellar failure. STUDY DESIGN: Ex vivo experiment. METHODS: Biomechanical testing was used to assess the structural integrity of lamellar explants exposed to either medium alone (control) or medium supplemented with insulin. Lamellar explants comprised of hoof wall, lamellar tissue and distal phalanx were harvested from four adult horses with no evidence of inflammatory disease or pre-existing disease of the digit. Following an equilibration period, explants were incubated in medium or medium supplemented with insulin (2.5 µg/ml) for 8 h prior to biomechanical testing to obtain load (N), stress (MPa), elongation to failure (mm), and Young's modulus (MPa) for each explant. Significant differences were assessed using a mixed linear model with horses as a random factor and control or insulin-treated group as a fixed factor. RESULTS: Lamellar explants incubated in medium supplemented with insulin failed at significantly lower load (P = 0.0001) and lower stress (P = 0.001) and had greater elongation to failure (P = 0.02). MAIN LIMITATIONS: In addition to the ex vivo nature of the study, location-dependent variability in explant structural integrity and variable diffusion of nutrients due to explant size may have been limitations. However, the study design attempted to account for these limitations through random assignment of explants to treatment groups independent of location and by evaluating stress to failure. CONCLUSIONS: Insulin weakens the structural integrity of equine lamellar explants and an ex vivo model for evaluation of hyperinsulinaemia-induced lamellar failure was established. The summary is available in Spanish - see Supporting Information.


Asunto(s)
Enfermedades del Pie/veterinaria , Pezuñas y Garras/efectos de los fármacos , Enfermedades de los Caballos/tratamiento farmacológico , Hipoglucemiantes/farmacología , Insulina/farmacología , Animales , Fenómenos Biomecánicos , Medios de Cultivo , Femenino , Enfermedades del Pie/tratamiento farmacológico , Enfermedades del Pie/etiología , Enfermedades del Pie/fisiopatología , Miembro Anterior , Pezuñas y Garras/fisiología , Enfermedades de los Caballos/etiología , Enfermedades de los Caballos/fisiopatología , Caballos , Hiperinsulinismo/complicaciones , Hiperinsulinismo/fisiopatología , Hiperinsulinismo/veterinaria , Modelos Lineales , Masculino , Distribución Aleatoria , Estrés Fisiológico , Falanges de los Dedos del Pie/efectos de los fármacos , Falanges de los Dedos del Pie/fisiología
6.
J Dev Orig Health Dis ; 10(1): 39-47, 2019 02.
Artículo en Inglés | MEDLINE | ID: mdl-29764530

RESUMEN

Childhood obesity rates are higher among Indigenous compared with non-Indigenous Australian children. It has been hypothesized that early-life influences beginning with the intrauterine environment predict the development of obesity in the offspring. The aim of this paper was to assess, in 227 mother-child dyads from the Gomeroi gaaynggal cohort, associations between prematurity, Gestation Related-Optimal Weight (GROW) centiles, maternal adiposity (percentage body fat, visceral fat area), maternal non-fasting plasma glucose levels (measured at mean gestational age of 23.1 weeks) and offspring BMI and adiposity (abdominal circumference, subscapular skinfold thickness) in early childhood (mean age 23.4 months). Maternal non-fasting plasma glucose concentrations were positively associated with infant birth weight (P=0.005) and GROW customized birth weight centiles (P=0.008). There was a significant association between maternal percentage body fat (P=0.02) and visceral fat area (P=0.00) with infant body weight in early childhood. Body mass index (BMI) in early childhood was significantly higher in offspring born preterm compared with those born at term (P=0.03). GROW customized birth weight centiles was significantly associated with body weight (P=0.01), BMI (P=0.007) and abdominal circumference (P=0.039) at early childhood. Our findings suggest that being born preterm, large for gestational age or exposed to an obesogenic intrauterine environment and higher maternal non-fasting plasma glucose concentrations are associated with increased obesity risk in early childhood. Future strategies should aim to reduce the prevalence of overweight/obesity in women of child-bearing age and emphasize the importance of optimal glycemia during pregnancy, particularly in Indigenous women.


Asunto(s)
Adiposidad , Obesidad Infantil/epidemiología , Efectos Tardíos de la Exposición Prenatal , Adulto , Australia , Peso al Nacer , Glucemia , Índice de Masa Corporal , Niño , Preescolar , Estudios de Cohortes , Diabetes Gestacional , Femenino , Servicios de Salud del Indígena , Humanos , Lactante , Recién Nacido , Salud Materna , Nativos de Hawái y Otras Islas del Pacífico , Obesidad Materna , Obesidad Infantil/etiología , Embarazo , Factores de Riesgo
7.
Sleep Med ; 59: 78-87, 2019 07.
Artículo en Inglés | MEDLINE | ID: mdl-30527705

RESUMEN

Indigenous populations continue to be among the world's most marginalized population groups. Studies in Indigenous populations from high income countries (including the United States, Canada, Australia, and New Zealand) indicate increased risk of sleep disorders compared to non-Indigenous populations. Poor sleep, whether it be short sleep duration or fragmented sleep, is a well-established risk factor for cardio-metabolic diseases. Given the implications, targeted improvement of poor sleep may be beneficial for the health and well-being of Indigenous people. In this narrative review, we will: (1) discuss the effects of sleep on the cardio-metabolic processes; (2) examine sleep in Indigenous populations; (3) review the association between sleep and cardio-metabolic risk in Indigenous populations; and (4) review the potential role of sleep in cardiovascular disease risk detection and interventions to improve sleep and cardio-metabolic health in Indigenous people. In particular, this review highlights that the assessment of sleep quality and quantity may be a beneficial step toward identifying Indigenous people at risk of cardio-metabolic diseases and may represent a key intervention target to improve cardio-metabolic outcomes.


Asunto(s)
Estado de Salud , Sueño/fisiología , Australia , Canadá , Enfermedades Cardiovasculares/etnología , Enfermedades Cardiovasculares/etiología , Disparidades en el Estado de Salud , Humanos , Indígenas Norteamericanos , Enfermedades Metabólicas/etnología , Enfermedades Metabólicas/etiología , Nativos de Hawái y Otras Islas del Pacífico , Nueva Zelanda , Grupos de Población , Estados Unidos
8.
Equine Vet J ; 49(5): 643-654, 2017 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-28078757

RESUMEN

BACKGROUND: Insulin dysregulation, obesity, and exposure to high-nonstructural carbohydrate (NSC) forage are risk factors for equine metabolic syndrome-associated laminitis (EMSAL); high systemic insulin concentrations in EMSAL are proposed to induce cellular dysregulation in the digital lamellae through activation of the insulin-like growth factor-1 receptor. OBJECTIVES: To use a dietary challenge model (DCM) and a euglycaemic-hyperinsulinaemic clamp (EHC) model to assess lamellar growth factor-related signalling. STUDY DESIGN: Lamellar phospho (P)-protein concentrations of signalling proteins important in growth factor-related signalling were assessed in 2 models: 1) lean and obese ponies on a low- or high-NSC diet; and 2) EHC model using Standardbred horses. METHODS: Ponies stratified for body condition (lean [LN, n = 11] and obese [OB, n = 11]) were exposed to a low-NSC diet (LO, n = 5 per group for LN LO and OB LO) or a high NSC diet (HI, n = 6 per group for LN HI and OB HI groups) for 7 days. For the EHC model, horses were administered insulin (constant rate infusion [6 mIU/kg bwt/min] combined with 50% dextrose, EHC group, n = 8)] or saline (0.57 mL/kg bwt/h, CON group, n = 8) for 48 h. Immunoblotting was employed to assess concentrations of activated/phosphorylated and total protein for members of the PI3K/Akt/mTORC1 and Ras/ERK pathways in lamellar samples from both models. RESULTS: In the DCM, lamellar P-(Ser 240/244) RPS6 was increased in OB HI ponies (vs. OB LO, P<0.05); positive correlations existed (P<0.05; r>0.5) between Day 7 basal serum insulin concentrations and lamellar concentrations of P-p70S6K and P-(Ser 240/244) RPS6. In the EHC model, lamellar concentrations of P-Akt, P-p70S6K, P-ERK 1/2, P-p90RSK, and both P-(Ser 235/236) and P-(Ser 240/244) RPS6 were increased in the EHC group (vs. CON, P<0.05). MAIN LIMITATIONS: The primary limitations of this study are the small number of animals per group in the DCM study, and the fact that many animals did not develop laminitis as that was not the endpoint of either study. CONCLUSIONS: These results support further investigation of mTORC1/RPS6 signalling as a potential therapeutic target(s) in EMSAL. The Summary is available in Chinese - see Supporting Information.


Asunto(s)
Enfermedades del Pie/veterinaria , Enfermedades de los Caballos/metabolismo , Receptor IGF Tipo 1/metabolismo , Animales , Enfermedades del Pie/metabolismo , Regulación de la Expresión Génica , Pezuñas y Garras , Caballos , Inflamación , Fosfatidilinositol 3-Quinasas , Somatomedinas
10.
Vet J ; 202(1): 83-8, 2014 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-25155219

RESUMEN

Hyperinsulinemia causes laminitis experimentally and is a risk factor for naturally occurring laminitis. The aim of this study was to investigate the effects of insulin on laminar vascular relaxation and to induce insulin-associated vascular dysfunction in vitro. Relaxation responses of isolated laminar arterial and venous rings to acetylcholine and insulin were evaluated. To alter vascular function in response to insulin, all vessel rings were incubated with insulin or vehicle, submaximally contracted, administered insulin again and relaxation responses recorded. Laminar arteries were also incubated with the mitogen-activated protein kinase (MAPK) inhibitor, PD-98059. Relaxation in response to acetylcholine was not different between arteries and veins, but veins relaxed less in response to insulin than arteries. In arteries incubated with insulin, the subsequent relaxation response to insulin was blunted. Veins had minimal relaxation to insulin regardless of incubation. Arteries incubated with PD-98059 relaxed more in response to insulin than arteries not exposed to PD-98059, indicating that MAPK plays a role in maintenance of basal tone in laminar arteries. A differing response of laminar veins and arteries to insulin-induced relaxation may be important in understanding the link between hyperinsulinemia and laminitis. In vitro induction of vascular dysfunction in response to insulin in laminar arteries may be useful for testing therapeutic interventions and for understanding the pathophysiology of laminitis.


Asunto(s)
Vasos Sanguíneos/efectos de los fármacos , Caballos , Insulina/farmacología , Vasodilatación/efectos de los fármacos , Acetilcolina/farmacología , Animales , Femenino , Flavonoides/farmacología , Pie/irrigación sanguínea , Masculino , Quinasas de Proteína Quinasa Activadas por Mitógenos/antagonistas & inhibidores , Técnicas de Cultivo de Tejidos , Vasodilatadores/farmacología
11.
Health Place ; 28: 58-66, 2014 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-24751666

RESUMEN

We investigated disparities in rates of acute myocardial infarction (AMI) between Aboriginal and non-Aboriginal people in the 199 Statistical Local Areas (SLAs) in New South Wales, Australia. Using routinely collected and linked hospital and mortality data from 2002 to 2007, we developed multilevel Poisson regression models to estimate the relative rates of first AMI events in the study period accounting for area of residence. Rates of AMI in Aboriginal people were more than two times that in non-Aboriginal people, with the disparity greatest in more disadvantaged and remote areas. AMI rates in Aboriginal people varied significantly by SLA, as did the Aboriginal to non-Aboriginal rate ratio. We identified almost 30 priority areas for universal and targeted preventive interventions that had both high rates of AMI for Aboriginal people and large disparities in rates.


Asunto(s)
Disparidades en el Estado de Salud , Infarto del Miocardio/epidemiología , Nativos de Hawái y Otras Islas del Pacífico/estadística & datos numéricos , Adulto , Distribución por Edad , Anciano , Anciano de 80 o más Años , Femenino , Geografía , Humanos , Masculino , Persona de Mediana Edad , Infarto del Miocardio/etnología , Nueva Gales del Sur/epidemiología , Distribución de Poisson , Sistema de Registros , Población Rural/estadística & datos numéricos , Distribución por Sexo , Población Urbana/estadística & datos numéricos
12.
Rural Remote Health ; 13(2): 2255, 2013.
Artículo en Inglés | MEDLINE | ID: mdl-23548075

RESUMEN

CONTEXT: Australian Aboriginal communities in urban, rural and remote areas are continuing to suffer high rates of perinatal mortality and morbidity that will impact on the future health of the community. It has been well documented that Aboriginal women have extreme distrust of mainstream pregnancy-related health care and suggested that late entry into antenatal care is as high as 50% in the Aboriginal population. Although medical and midwifery staff have long discussed strategies to improve uptake of antenatal health care for Aboriginal women, researchers in many areas have found the recruitment of Aboriginal people into scientific studies almost impossible. This article seeks to share the strategies that have been developed over a period of time by the authors that have proved useful for recruitment and retention into research. It is anticipated that these strategies would also apply for health practitioners in maintaining their patients for clinical care management. ISSUE: Although each research location (regional, rural and remote) has had to spend time determining what approach is best for meeting the research outcomes, many of these suggestions become applicable to clinicians seeking to develop better connections with Aboriginal patients in their clinics. With the management of ongoing chronic health conditions for Aboriginal people a priority in 'Closing the Gap', a number of these suggestions could easily be implemented by clinicians. Remembering that each community has specific needs that must be addressed, priorities for assistance for that community will be easily identifiable after community consultation (eg transport, or ability to access medical testing). Opportunities for the use of new social media (eg Facebook) as communication tools for researchers and clinicians will have increasing applicability as further software updates are created. LESSONS LEARNT: With open and trusting dialogues between researchers, clinicians and Aboriginal communities, we can go a long way towards understanding the needs of individual communities and working in partnerships to close the gap.


Asunto(s)
Investigación Participativa Basada en la Comunidad/métodos , Relaciones Comunidad-Institución , Nativos de Hawái y Otras Islas del Pacífico , Selección de Paciente , Investigación Biomédica , Femenino , Investigación sobre Servicios de Salud , Humanos , Masculino , Participación del Paciente/psicología , Participación del Paciente/estadística & datos numéricos , Mortalidad Perinatal/etnología , Técnicas de Planificación , Embarazo , Atención Prenatal/psicología , Atención Prenatal/normas , Relaciones Profesional-Paciente , Población Rural/estadística & datos numéricos , Viaje , Población Urbana/estadística & datos numéricos , Recursos Humanos
13.
Equine Vet J ; 43(6): 744-9, 2011 Nov.
Artículo en Inglés | MEDLINE | ID: mdl-21496102

RESUMEN

REASONS FOR PERFORMING STUDY: One of the causes of equine laminitis is hyperinsulinaemia, which may be associated with endothelial dysfunction and insulin resistance of vessels. HYPOTHESIS AND OBJECTIVES: Insulin resistance can be induced in palmar digital vessels by continued exposure to insulin in vitro. The objective was to evaluate this in vitro model for future studies. METHODS: Palmar digital vessel segments were collected immediately after euthanasia from horses with normal insulin/glucose blood values. Four arterial and 4 venous rings (3 mm wide) were prepared and each ring mounted in a tissue bath, containing Tyrode's solution at 37°C, 2 g tension was applied and the rings allowed to equilibrate for 45 min. Of the 4 rings of each vessel type, one was used as a control. One each of the remaining 3 rings was used for incubation with insulin (to induce resistance), wortmannin (to block PI3-kinase) and PD-098059 (to block MAP-kinase), respectively, for 30 min. After the incubation period, the rings were contracted with phenylephrine. When the response reached a plateau, a single dose of insulin was added to the baths and the response of each ring monitored for 30 min. RESULTS: Insulin relaxed the control rings and those treated with PD 098059 but contracted those pretreated with insulin and wortmannin. Normal relaxation responses of the rings were converted to contractions by insulin resistance. Insulin resistance was confirmed by the qualitative response of insulin-incubated and wortmannin-incubated rings. CONCLUSIONS: This study demonstrated successful induction of insulin resistance in both arterial and venous rings. It also suggested that the MAP-kinase pathway plays a minor role in controlling vasomotor tone under normal physiological conditions. POTENTIAL RELEVANCE: The study suggests that the induction of insulin resistance in equine palmar digital vessel rings is reliable and provides a good in vitro model for studying the vascular insulin resistance which may occur in equine laminitis.


Asunto(s)
Arterias/efectos de los fármacos , Miembro Anterior/irrigación sanguínea , Enfermedades de los Caballos/metabolismo , Resistencia a la Insulina/fisiología , Insulina/farmacología , Venas/efectos de los fármacos , Androstadienos/farmacología , Animales , Arterias/fisiología , Pie , Enfermedades del Pie/metabolismo , Enfermedades del Pie/veterinaria , Caballos , Fenilefrina/farmacología , Vasoconstricción/efectos de los fármacos , Vasoconstrictores/farmacología , Vasodilatación/efectos de los fármacos , Venas/fisiología , Wortmanina
14.
J Vet Intern Med ; 23(6): 1239-46, 2009.
Artículo en Inglés | MEDLINE | ID: mdl-19761476

RESUMEN

BACKGROUND: Summer pasture-associated recurrent airway obstruction (SPA-RAO), a seasonal airway obstructive disease of horses, is characterized by clinical exacerbation after exposure to pasture during warm months of the year. Endothelin (ET)-1, potent bronchoconstrictor, mitogen, secretagogue, and proinflammatory mediator, has been implicated in the pathogenesis of asthma and equine heaves. HYPOTHESIS: Immunoreactive ET-1 concentrations increase during clinical exacerbation and return to basal values during periods of disease remission. ANIMALS: Twelve horses, 6 affected with SPA-RAO and 6 nonaffected. METHODS: Prospective, observational study. Bronchoalveolar lavage fluid (BALF), arterial and venous plasma samples, and clinical variables were obtained from affected horses during clinical exacerbation and remission. Samples and data of nonaffected horses were collected during the summer and winter on dates similar to affected horses. Immunoreactive ET-1 was determined using a commercial ELISA. RESULTS: The median and range ET-1 concentrations (pg/ml) in arterial (1.3, 0.7-1.8) and venous (1.3, 1.2-1.7) plasma and in BALF (0.3, 0.2-0.4), and pulmonary epithelial lining fluid (PELF) (25.5, 21-50) were greater in affected horses during clinical exacerbation compared with remission (P < .01). The concentrations of immunoreactive ET-1 were greater in affected horses during clinical exacerbation compared with nonaffected horses (P < .05). CONCLUSIONS AND CLINICAL IMPORTANCE: During clinical exacerbation of SPA-RAO, ET-1 is increased in circulation and pulmonary secretions. Intervention with ET receptor antagonists should provide further information on the role of ET-1 in SPA-RAO.


Asunto(s)
Líquido del Lavado Bronquioalveolar/química , Endotelinas/análisis , Enfermedades de los Caballos/sangre , Enfermedades Pulmonares Obstructivas/veterinaria , Animales , Femenino , Caballos , Enfermedades Pulmonares Obstructivas/sangre , Enfermedades Pulmonares Obstructivas/metabolismo , Masculino , Estudios Prospectivos , Pruebas de Función Respiratoria , Estaciones del Año , Factores de Tiempo
15.
J Obstet Gynaecol ; 29(3): 181-7, 2009 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-19358020

RESUMEN

Pregnancy is a vulnerable period in women's lives, with a range of maternal and environmental factors impacting upon pregnancy outcome. This study sought to explore the clustering of health risks among pregnant women, and compare the characteristics of women exhibiting clustered risks. A cross-sectional study was undertaken at a large public hospital in Queensland, Australia. Cluster analysis grouped women who had similar levels of risk based on health and lifestyle factors demonstrated to be associated with adverse maternal and infant outcomes. Interviews were conducted with 437 women. The results highlight the interconnectedness of demographic and health risks, and high concentration of risks among Indigenous women. Vulnerable women can be identified and targeted for public health interventions focussing on clustered risk factors, such as alcohol, smoking and sexually transmitted infections. Opportunity exists for screening in routine primary care to identify the individuals who are at risk, rather than identifying specific risks.


Asunto(s)
Resultado del Embarazo/epidemiología , Adulto , Análisis por Conglomerados , Estudios Transversales , Femenino , Humanos , Embarazo , Complicaciones del Embarazo/epidemiología , Queensland/epidemiología , Factores de Riesgo , Factores Socioeconómicos , Adulto Joven
17.
J Obstet Gynaecol ; 27(7): 664-71, 2007 Oct.
Artículo en Inglés | MEDLINE | ID: mdl-17999289

RESUMEN

Antenatal smoking is a potentially preventable risk factor associated with pre-term birth and low birth weight. Rates of antenatal smoking, low birth weight, and infant mortality are all higher among the Indigenous populations than the non-Indigenous populations of Australia, Canada, New Zealand and the USA. Given this, it might be expected that publications examining smoking cessation efforts in Indigenous antenatal groups would be substantive. We examined the differences in the number and type of antenatal smoking publications for Indigenous and non-Indigenous populations across three time periods (1984-86, 1994-96 and 2004-06). Articles were classified as research studies (focusing on measurement, descriptive, or intervention studies), literature reviews, descriptions of programmes or research (with no data), or discussions. There was a significant increase in the number of publications relating to antenatal smoking among Indigenous populations in the time periods examined, but the total number of publications remained small. The number relating to general antenatal populations increased, but remained substantially lower than that relating to low birth weight. There was no increase in the proportional allocation of research articles to the intervention category in the later time period. The pattern of research output relating to antenatal smoking by mainstream or Indigenous populations is not optimal for advancement of knowledge in the field. There is a clear need for intervention-based research to allow the development of evidence-based practice for reducing the prevalence of antenatal smoking and associated health issues.


Asunto(s)
Nacimiento Prematuro/etiología , Fumar/efectos adversos , Femenino , Humanos , Mortalidad Infantil , Recién Nacido de Bajo Peso , Recién Nacido , Embarazo , Resultado del Embarazo , Atención Prenatal , Factores de Riesgo , Prevención del Hábito de Fumar , Poblaciones Vulnerables
18.
Vet Pathol ; 42(1): 81-4, 2005 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-15657277

RESUMEN

AL amyloidosis is the most common type of systemic amyloidosis in humans, and it is frequently associated with multiple myeloma. But, AL amyloidosis is very rare in domestic animals. A 16-year-old Quarter horse gelding was diagnosed with systemic AL amyloidosis associated with multiple myeloma. Clinical problems were rapid weight loss, muscle atrophy, soft unformed stool, and ventral edema. Grossly, diffuse gastrointestinal hemorrhage, markedly thickened jejunal mucosa, and splenomegaly were present. Microscopically, diffuse severe amyloid deposits were present in the lamina propria of glandular stomach, duodenum, and jejunum. Much of the spleen and sternal bone marrow was replaced by neoplastic round cells, and multiple foci of amyloid were also present in the spleen and bone marrow. Electron microscopy revealed the neoplastic round cells to be of plasma cell origin, and the amyloid showed a strongly positive immunoreactivity with polyclonal anti-human immunoglobin lambda light-chain antisera. To our knowledge, this is the second report describing systemic AL amyloidosis in domestic animals-associated plasma cell neoplasia and the first associated with multiple myeloma, as is common in humans.


Asunto(s)
Amiloidosis/veterinaria , Enfermedades de los Caballos/patología , Mieloma Múltiple/veterinaria , Amiloidosis/complicaciones , Amiloidosis/patología , Animales , Médula Ósea/patología , Resultado Fatal , Histocitoquímica/veterinaria , Caballos , Yeyuno/patología , Masculino , Microscopía Electrónica de Transmisión/veterinaria , Mieloma Múltiple/complicaciones , Mieloma Múltiple/patología , Bazo/patología
19.
Equine Vet J ; 36(3): 204-9, 2004 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-15147125

RESUMEN

To date, there is a substantial amount of data to support the hypotheses that vascular and enzymatic changes are ongoing in experimental laminitis. Furthermore, there is substantial in vitro evidence that the enzymatic changes weaken the dermo-epidermal attachments leading to mechanical failure of the hoof-bone interface of the equine digit. However, investigators of both the vascular and enzymatic theories have, to date, been unable to substantiate the effects of these pathophysiological changes in vivo on laminar tissues of horses afflicted with experimentally induced or naturally acquired laminitis. In addition, the effects of laminitis-inducing treatment have not been prevented or reversed by treatment with an MMP inhibitor or a vasoactive antagonist. It is possible that there is simultaneous activation of the vascular and enzymatic pathways and/or other inflammatory processes. Moreover, the third theory involving mechanical factors cannot be discounted simply because strong evidence for vascular and enzymatic changes exists. It is common for horses with severe musculoskeletal disease affecting weightbearing on a limb to develop laminitis in the contralateral limb. It remains to be determined what factors are responsible for initiation of laminitis in these individuals. Evidence has not been presented that precludes the possibility of coincident occurrence of vascular and enzymatic changes. In fact, many of the inflammatory mediators (e.g. interleukin-1beta) found in laminitic tissues can concurrently stimulate synthesis of vasoactive substances and activate MMPs. Because enzymatic action on proteins is largely dependent on the concentrations of proteins and enzyme, the enzymatic theory is not dependent upon increased delivery of enzymes via increased capillary flow. Likewise, because vascular changes can alter tissue function via increased capillary flow and oedema formation, the vascular theory is not dependent upon decreased capillary flow. It is true that naturally acquired laminitis is widely variable in severity and predisposing diseases. Therefore, most probably there are multiple mechanisms involved in the initiation and propagation of the pathophysiologic cascade(s) and, therefore, successful intervention will necessitate multiple treatment modalities.


Asunto(s)
Enfermedades del Pie/veterinaria , Pezuñas y Garras/fisiología , Enfermedades de los Caballos/etiología , Enfermedad Aguda , Animales , Enfermedades del Pie/enzimología , Enfermedades del Pie/etiología , Enfermedades del Pie/fisiopatología , Hemodinámica , Pezuñas y Garras/irrigación sanguínea , Pezuñas y Garras/enzimología , Enfermedades de los Caballos/enzimología , Enfermedades de los Caballos/fisiopatología , Caballos , Inflamación/enzimología , Inflamación/etiología , Inflamación/fisiopatología , Inflamación/veterinaria
20.
Braz. j. vet. res. anim. sci ; 41: 279-279, 2004.
Artículo en Portugués | LILACS-Express | LILACS, VETINDEX | ID: biblio-1470907

RESUMEN

O artigo não apresenta resumo.

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