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1.
Cancer Causes Control ; 34(1): 23-37, 2023 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-36208351

RESUMEN

PURPOSE: Determine sociocultural influences on dietary behavior, body image, weight loss, and perceptions of the cultural appropriateness of a meal-timing intervention design and menu among Native Hawaiian and Pacific Islander (NHPI) women at risk of endometrial cancer. METHODS: Six 90-min videoconference focus groups among NHPI women (n = 35) recruited by a community champion in Utah. Eligible women were aged ≥ 18 years at risk of endometrial cancer (i.e., BMI ≥ 25 kg/m2, history of non-insulin-dependent diabetes or complex atypical endometrial hyperplasia) had a working cell phone capable of downloading a phone app, could use their cell phone during the day, and were not night-shift workers. Twelve semi-structured questions were posed during the focus groups. Using inductive qualitative methods based on Hatch's 9-step approach, de-identified transcript data were analyzed. RESULTS: Overarching themes included economic factors, cultural influences, meal choice and timing, and perceptions of health. Subthemes included affordability, waste avoidance, inundated schedules, and cultural influences. Perceptions of body size and weight loss were influenced by family, community, and social media, whose messages could be conflicting. Important intervention components included satisfying, convenient pre-made meals, while barriers included the need to cook for family members. CONCLUSIONS: Dietary interventions targeting metabolic health among NHPI women should consider the multitude of sociocultural and economic factors that influence food choices and meal timing in this population, including affordability, hectic schedules, and immigrant adjustment. Promoting the link between physical and mental well-being as opposed to weight loss is a key approach to reaching this population.


Asunto(s)
Neoplasias Endometriales , Nativos de Hawái y Otras Islas del Pacífico , Humanos , Femenino , Pueblos Isleños del Pacífico , Hawaii/epidemiología , Dieta , Pérdida de Peso
2.
Osteoarthritis Cartilage ; 29(6): 882-893, 2021 06.
Artículo en Inglés | MEDLINE | ID: mdl-33744432

RESUMEN

OBJECTIVE: To compare the early responses to joint injury in conventional and germ-free mice. DESIGN: Post-traumatic osteoarthritis (PTOA) was induced using a non-invasive anterior cruciate ligament rupture model in 20-week old germ-free (GF) and conventional C57BL/6 mice. Injury was induced in the left knees of n = 8 GF and n = 10 conventional mice. To examine the effects of injury, n = 5 GF and n = 9 conventional naïve control mice were used. Mice were euthanized 7 days post-injury, followed by synovial fluid recovery for global metabolomic profiling and analysis of epiphyseal trabecular bone by micro-computed tomography (µCT). Global metabolomic profiling assessed metabolic differences in the joint response to injury between GF and conventional mice. Magnitude of trabecular bone volume loss measured using µCT assessed early OA progression in GF and conventional mice. RESULTS: µCT found that GF mice had significantly less trabecular bone loss compared to conventional mice, indicating that the GF status was protective against early OA changes in bone structure. Global metabolomic profiling showed that conventional mice had greater variability in their metabolic response to injury, and a more distinct joint metabolome compared to their corresponding controls. Furthermore, differences in the response to injury in GF compared to conventional mice were linked to mouse metabolic pathways that regulate inflammation associated with the innate immune system. CONCLUSIONS: These results suggest that the gut microbiota promote the development of PTOA during the acute phase following joint trauma possibly through the regulation of the innate immune system.


Asunto(s)
Hueso Esponjoso , Epífisis/metabolismo , Epífisis/microbiología , Microbioma Gastrointestinal , Metabolómica , Osteoartritis/metabolismo , Osteoartritis/microbiología , Animales , Femenino , Masculino , Ratones , Ratones Endogámicos C57BL
3.
J Clin Microbiol ; 58(10)2020 09 22.
Artículo en Inglés | MEDLINE | ID: mdl-32817226

RESUMEN

Mycoplasma pneumoniae is a major cause of community-acquired pneumonia. There are limited data in the United States on the molecular epidemiological characteristics of M. pneumoniae We collected 446 M. pneumoniae-positive specimens from 9 states between August 2012 and October 2018. Culture, antimicrobial susceptibility testing, P1 subtyping, and multilocus VNTR (variable-number tandem repeats) analysis (MLVA) were performed to characterize the isolates. Macrolide-resistant M. pneumoniae (MRMp) was detected in 37 (8.3%) specimens. P1 subtype 2 (P1-2) was the predominant P1 subtype (59.8%). P1 subtype distribution did not change significantly chronologically or geographically. The macrolide resistance rate in P1 subtype 1 (P1-1) samples was significantly higher than that in P1-2 (12.9% versus 5.5%). Six P1-2 variants were identified, including two novel types, and variant 2c was predominant (64.6%). P1-2 variants were distributed significantly differently among geographic regions. Classical P1-2 was more frequent in lower respiratory tract specimens and had longer p1 trinucleotide repeats. Classical P1-2 was most common in MRMp (35.7%), while variant 2c was most common in macrolide-susceptible M. pneumoniae (67.5%). Fifteen MLVA types were identified; 3-5-6-2 (41.7%), 4-5-7-2 (35.3%), and 3-6-6-2 (16.6%) were the major types, and four MLVA clusters were delineated. The distribution of MLVA types varied significantly over time and geographic location. The predominant MLVA type switched from 4-5-7-2 to 3-5-6-2 in 2015. MLVA type was associated with P1 subtypes and P1-2 variant types but not with macrolide resistance. To investigate the M. pneumoniae genotype shift and its impact on clinical presentations, additional surveillance programs targeting more diverse populations and prolonged sampling times are required.


Asunto(s)
Mycoplasma pneumoniae , Neumonía por Mycoplasma , Antibacterianos/farmacología , Antibacterianos/uso terapéutico , Farmacorresistencia Bacteriana , Genotipo , Humanos , Macrólidos/farmacología , Mycoplasma pneumoniae/genética , Neumonía por Mycoplasma/tratamiento farmacológico , Neumonía por Mycoplasma/epidemiología , Estados Unidos/epidemiología
4.
BMC Fam Pract ; 21(1): 93, 2020 05 20.
Artículo en Inglés | MEDLINE | ID: mdl-32434467

RESUMEN

BACKGROUND: Unhealthy alcohol use is the third leading cause of preventable death in the United States. Evidence demonstrates that screening for unhealthy alcohol use and providing persons engaged in risky drinking with brief behavioral and counseling interventions improves health outcomes, collectively termed screening and brief interventions. Medication assisted therapy (MAT) is another effective method for treatment of moderate or severe alcohol use disorder. Yet, primary care clinicians are not regularly screening for or treating unhealthy alcohol use. METHODS AND ANALYSIS: We are initiating a clinic-level randomized controlled trial aimed to evaluate how primary care clinicians can impact unhealthy alcohol use through screening, counseling, and MAT. One hundred and 25 primary care practices in the Virginia Ambulatory Care Outcomes Research Network (ACORN) will be engaged; each will receive practice facilitation to promote screening, counseling, and MAT either at the beginning of the trial or at a 6-month control period start date. For each practice, the intervention includes provision of a practice facilitator, learning collaboratives with three practice champions, and clinic-wide information sessions. Clinics will be enrolled for 6-12 months. After completion of the intervention, we will conduct a mixed methods analysis to identify changes in screening rates, increase in provision of brief counseling and interventions as well as MAT, and the reduction of alcohol intake for patients after practices receive practice facilitation. DISCUSSION: This study offers a systematic process for dissemination and implementation of the evidence-based practice of screening, counseling, and treatment for unhealthy alcohol use. Practices will be asked to implement a process for screening, counseling, and treatment based on their practice characteristics, patient population, and workflow. We propose practice facilitation as a robust and feasible intervention to assist in making changes within the practice. We believe that the process can be replicated and used in a broad range of clinical settings; we anticipate this will be supported by our evaluation of this approach. TRIAL REGISTRATION: ClinicalTrials.gov, ClinicalTrials.gov Identifier: NCT04248023, Registered 5 February 2020.


Asunto(s)
Trastornos Relacionados con Alcohol , Alcoholismo , Consejo/organización & administración , Tamizaje Masivo/organización & administración , Administración del Tratamiento Farmacológico/organización & administración , Servicios Preventivos de Salud , Atención Primaria de Salud/métodos , Adulto , Trastornos Relacionados con Alcohol/etiología , Trastornos Relacionados con Alcohol/prevención & control , Alcoholismo/complicaciones , Alcoholismo/diagnóstico , Alcoholismo/tratamiento farmacológico , Alcoholismo/psicología , Práctica Clínica Basada en la Evidencia/métodos , Femenino , Conductas de Riesgo para la Salud , Humanos , Masculino , Rol del Médico , Médicos de Familia , Servicios Preventivos de Salud/métodos , Servicios Preventivos de Salud/organización & administración , Mejoramiento de la Calidad
5.
Cult Med Psychiatry ; 44(2): 193-213, 2020 Jun.
Artículo en Inglés | MEDLINE | ID: mdl-31463757

RESUMEN

This paper describes a pervasive form of psychological distress occurring among people undergoing a sudden and acute collapse of faith in the teachings of the Church of Jesus Christ of Latter-day Saints (aka LDS, or Mormon Church). Drawing on 18 months of fieldwork in Utah, I trace the cultural-historical etiology of this unique form of psycho-existential trauma, focusing on ex-Mormons' narratives of 'world collapse'-in which the all-encompassing symbolic-existential framework of reality once provided by religion disintegrated once they lost faith in the Mormon Church. Although marked by symptoms resembling depression, anxiety, dissociation and paranoia, this condition is however unlike mental health disorders described in psychiatric diagnostic manuals, and has thus been largely overlooked within the mental health professions. I thereby discuss the extent to which the distress of religious disenchantment constitutes a unique form of 'cultural syndrome' (Hinton and Lewis-Fernandez in Cult Med Psychiatry 34(2):209-218, 2010), reflective of complex historical, cultural, and religious transformations occurring within contemporary Utah Mormonism.


Asunto(s)
Iglesia de Jesucristo de los Santos de los Últimos Días/psicología , Trastornos Mentales/psicología , Distrés Psicológico , Cultura , Humanos , Religión y Medicina , Utah
6.
Ecol Lett ; 22(2): 390-404, 2019 Feb.
Artículo en Inglés | MEDLINE | ID: mdl-30548755

RESUMEN

Inducible defences against predation are widespread in the natural world, allowing prey to economise on the costs of defence when predation risk varies over time or is spatially structured. Through interspecific interactions, inducible defences have major impacts on ecological dynamics, particularly predator-prey stability and phase lag. Researchers have developed multiple distinct approaches, each reflecting assumptions appropriate for particular ecological communities. Yet, the impact of inducible defences on ecological dynamics can be highly sensitive to the modelling approach used, making the choice of model a critical decision that affects interpretation of the dynamical consequences of inducible defences. Here, we review three existing approaches to modelling inducible defences: Switching Function, Fitness Gradient and Optimal Trait. We assess when and how the dynamical outcomes of these approaches differ from each other, from classic predator-prey dynamics and from commonly observed eco-evolutionary dynamics with evolving, but non-inducible, prey defences. We point out that the Switching Function models tend to stabilise population dynamics, and the Fitness Gradient models should be carefully used, as the difference with evolutionary dynamics is important. We discuss advantages of each approach for applications to ecological systems with particular features, with the goal of providing guidelines for future researchers to build on.


Asunto(s)
Evolución Biológica , Conducta Predatoria , Animales , Ecosistema , Fenotipo , Dinámica Poblacional
7.
J Clin Microbiol ; 57(11)2019 11.
Artículo en Inglés | MEDLINE | ID: mdl-31484701

RESUMEN

There are sparse data to indicate the extent that macrolide-resistant Mycoplasma pneumoniae (MRMp) occurs in the United States or its clinical significance. Between 2015 and 2018, hospitals in 8 states collected and stored respiratory specimens that tested positive for M. pneumoniae and sent them to the University of Alabama at Birmingham, where real-time PCR was performed for detection of 23S rRNA mutations known to confer macrolide resistance. MRMp was detected in 27 of 360 specimens (7.5%). MRMp prevalence was significantly higher in the South and East (18.3%) than in the West (2.1%). A2063G was the predominant 23S rRNA mutation detected. MICs for macrolide-susceptible M. pneumoniae (MSMp) were ≤0.008 µg/ml, whereas MICs for MRMp were 16 to 32 µg/ml. Patients with MRMp infection were more likely to have a history of immunodeficiency or malignancy. Otherwise, there were no other significant differences in the clinical features between patients infected with MRMp and those infected with MSMp, nor were there any differences in radiographic findings, hospitalization rates, viral coinfections, the mean duration of antimicrobial treatment, or clinical outcomes. There was no significant change in MRMp incidence over time or according to age, sex, race/ethnicity, or status as an inpatient or an outpatient. Patients with MRMp were more likely to have received a macrolide prior to presentation, and their treatment was more likely to have been changed to a fluoroquinolone after presentation. This is the first national surveillance program for M. pneumoniae in the United States. Additional surveillance is needed to assess the clinical significance of MRMp and to monitor changes in MRMp prevalence.


Asunto(s)
Antibacterianos/farmacología , Farmacorresistencia Bacteriana/genética , Macrólidos/farmacología , Mycoplasma pneumoniae/efectos de los fármacos , Neumonía por Mycoplasma/epidemiología , Adolescente , Adulto , Anciano , Anciano de 80 o más Años , Niño , Preescolar , Monitoreo Epidemiológico , Femenino , Humanos , Lactante , Masculino , Pruebas de Sensibilidad Microbiana , Persona de Mediana Edad , Mutación , Mycoplasma pneumoniae/genética , Neumonía por Mycoplasma/microbiología , Prevalencia , ARN Ribosómico 23S/genética , Estados Unidos/epidemiología , Adulto Joven
8.
Proc Biol Sci ; 286(1914): 20192075, 2019 11 06.
Artículo en Inglés | MEDLINE | ID: mdl-31690236

RESUMEN

Melanism is widely observed among animals, and is adaptive in various contexts for its thermoregulatory, camouflaging, mate-attraction or photoprotective properties. Many organisms exposed to ultraviolet radiation show increased fitness resulting from melanin pigmentation; this has been assumed to result in part from reduced UV-induced damage to DNA. However, to effectively test the hypothesis that melanin pigmentation reduces UV-induced DNA damage requires quantification of UV-specific DNA damage lesions following UV exposure under controlled conditions using individuals that vary in pigmentation intensity. We accomplished this using alpine genotypes of the freshwater microcrustacean Daphnia melanica, for which we quantified cyclobutane pyrimide dimers in DNA, a damage structure that can only be generated by UV exposure. For genotypes with carapace melanin pigmentation, we found that individuals with greater melanin content sustained lower levels of UV-induced DNA damage. Individuals with more melanin were also more likely to survive exposure to ecologically relevant levels of UV-B radiation. Parallel experiments with conspecific genotypes that lack carapace melanin pigmentation provide additional support for our conclusion that melanism protects individuals from UV-induced DNA damage. Finally, within-genotype comparisons with asexually produced clonal siblings demonstrate that melanin content influences DNA damage even among genetically identical individuals raised in the same environment.


Asunto(s)
Rayos Ultravioleta , Zooplancton/fisiología , Animales , Daño del ADN , Melanosis , Pigmentación/fisiología
9.
Osteoarthritis Cartilage ; 27(8): 1174-1184, 2019 08.
Artículo en Inglés | MEDLINE | ID: mdl-31028882

RESUMEN

OBJECTIVE: Osteoarthritis (OA) is a multifactorial disease with etiological heterogeneity. The objective of this study was to classify OA subgroups by generating metabolomic phenotypes from human synovial fluid. DESIGN: Post mortem synovial fluids (n = 75) were analyzed by high performance-liquid chromatography mass spectrometry (LC-MS) to measure changes in the global metabolome. Comparisons of healthy (grade 0), early OA (grades I-II), and late OA (grades III-IV) donor populations were considered to reveal phenotypes throughout disease progression. RESULTS: Global metabolomic profiles in synovial fluid were distinct between healthy, early OA, and late OA donors. Pathways differentially activated among these groups included structural deterioration, glycerophospholipid metabolism, inflammation, central energy metabolism, oxidative stress, and vitamin metabolism. Within disease states (early and late OA), subgroups of donors revealed distinct phenotypes. Synovial fluid metabolomic phenotypes exhibited increased inflammation (early and late OA), oxidative stress (late OA), or structural deterioration (early and late OA) in the synovial fluid. CONCLUSION: These results revealed distinct metabolic phenotypes in human synovial fluid, provide insight into pathogenesis, represent novel biomarkers, and can move toward developing personalized interventions for subgroups of OA patients.


Asunto(s)
Cartílago Articular/metabolismo , Metabolómica , Osteoartritis de la Rodilla/metabolismo , Líquido Sinovial/metabolismo , Adulto , Anciano , Biomarcadores/metabolismo , Cromatografía Liquida , Progresión de la Enfermedad , Regulación hacia Abajo , Humanos , Inflamación/metabolismo , Espectrometría de Masas , Persona de Mediana Edad , Osteoartritis de la Rodilla/clasificación , Estrés Oxidativo , Fenotipo , Índice de Severidad de la Enfermedad , Regulación hacia Arriba , Adulto Joven
10.
Ann Fam Med ; 17(3): 200-206, 2019 05.
Artículo en Inglés | MEDLINE | ID: mdl-31085523

RESUMEN

BACKGROUND: Primary care clinicians write 45% of all opioid prescriptions in the United States, but little is known about the characteristics of patients who receive them and the clinicians who prescribe opioids in primary care settings. Our study aimed to describe the patient and clinician characteristics and clinicians' perspectives of chronic opioid prescribing in primary care. METHODS: Using a mixed methods approach, we completed an analysis of 2016 electronic health records from 21 primary care practices to identify patients who had received chronic opioids, which we defined as in receipt of an opioid prescription for at least 3 consecutive months. We compared those receiving chronic opioids with those not in terms of their demographics, prescribing clinician characteristics, and risk factors for opioid-related harms, as identified by the Centers for Disease Control and Prevention Guideline on Opioid Prescribing for Chronic Pain. We then interviewed 16 primary care clinicians about their perspectives on chronic opioid prescribing. RESULTS: Of 84,029 patients, 1.1% (902/84,929) received chronic opioid prescriptions. Characteristics associated with being prescribed chronic opioids include being female, being of black or African American race, and having risks for opioid-related harms, such as mental health diagnoses, substance use disorder, and concurrent benzodiazepine use. Clinicians report multiple difficulties in weaning patients from chronic opioids, including medical contraindications of nonopioid alternatives and difficulty justifying weaning by stable long-term patients. CONCLUSION: Although patients prescribed opioids in primary care have higher risks of opioid-related harms, clinicians report multiple barriers in deprescribing chronic opioids. Future studies should examine strategies to mitigate these harms and engage patients in shared decision making about their chronic opioid use.


Asunto(s)
Analgésicos Opioides/administración & dosificación , Actitud del Personal de Salud , Pautas de la Práctica en Medicina/estadística & datos numéricos , Atención Primaria de Salud/estadística & datos numéricos , Estudios de Casos y Controles , Femenino , Humanos , Masculino , Investigación Cualitativa , Factores de Riesgo , Estados Unidos
11.
Occup Med (Lond) ; 68(4): 279-281, 2018 05 23.
Artículo en Inglés | MEDLINE | ID: mdl-29596682

RESUMEN

Background: The need to keep physicians healthy and in practice is critical as demand for doctors grows faster than the supply. Workplace wellness programmes can improve employee health and retain skilled workers. Aims: To broaden our understanding about ways to help doctors coping with mental health problems and to develop population-informed workplace wellness recommendations for physician populations. Methods: Researchers surveyed physicians to document potential warning signs and prevention strategies. A survey was issued to doctors who presented to a physician health programme with mental health complaints. The survey captured respondents' feedback about how to identify and prevent mental health problems. Data were analyzed using simple descriptive statistics. Results: There were 185 participants. Half of respondents believed their problems could have been recognized sooner and 60% said they exhibited signs that could aid in earlier detection. Potential warnings included fluctuations in mood (67%), increased comments about stress/burnout (49%) and behavioural changes (32%). To improve detection, prevention and care-seeking for mental health problems, doctors endorsed multiple items related to the use of interpersonal supports, personal factors and organizational dynamics throughout the survey. Conclusions: The findings confirmed earlier work demonstrating the value of social and organizational support in maintaining physician health. It further indicated that earlier identification and/or prevention of mental health problems is not only possible, but that medical organizations are uniquely situated to carry out this work.


Asunto(s)
Promoción de la Salud/normas , Trastornos Mentales/diagnóstico , Salud Laboral/normas , Médicos/psicología , Adulto , Anciano , Femenino , Promoción de la Salud/métodos , Humanos , Masculino , Tamizaje Masivo/métodos , Tamizaje Masivo/normas , Persona de Mediana Edad , Salud Laboral/estadística & datos numéricos , Aceptación de la Atención de Salud/psicología , Médicos/estadística & datos numéricos , Encuestas y Cuestionarios , Lugar de Trabajo/psicología , Lugar de Trabajo/normas
12.
J Fish Biol ; 92(1): 73-84, 2018 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-29105768

RESUMEN

Stomach contents were collected from 117 yellow rays Urobatis jamaicensis from three locations in south Eleuthera, The Bahamas and compared with ambient infauna via sediment surveys. Diets were relatively limited with a total of 535 prey items recovered, representing five taxonomic groups and dominated by polychaetes and decapod crustaceans (87% of total diet), while environmental sampling reported 5249 individual taxa represented by 62 taxonomic groups. Regardless of gravidity, sex or density of prey items among sites, no significant differences were detected. Foraging strategy plots suggested preferential prey is rare within the environment and the Manly-Chesson index validates polychaetes were consumed with high selectivity. This is the most comprehensive and updated assessment of comparative feeding in this species, particularly for The Bahamas, allowing insight into invertebrate community richness and diversity in ecologically sensitive coastal and nearshore habitats.


Asunto(s)
Conducta Alimentaria , Contenido Digestivo , Rajidae/fisiología , Animales , Bahamas , Dieta , Ecología , Ecosistema
13.
J Org Chem ; 82(9): 4689-4702, 2017 05 05.
Artículo en Inglés | MEDLINE | ID: mdl-28441019

RESUMEN

The NHC-catalyzed transformation of unsaturated aldehydes into saturated esters through an organocatalytic homoenolate process has been thoroughly studied. Leveraging a unique "Umpolung"-mediated ß-protonation, this process has evolved from a test bed for homoenolate reactivity to a broader platform for asymmetric catalysis. Inspired by our success in using the ß-protonation process to generate enals from ynals with good E/Z selectivity, our early studies found that an asymmetric variation of this reaction was not only feasible, but also adaptable to a kinetic resolution of secondary alcohols through NHC-catalyzed acylation. In-depth analysis of this process determined that careful catalyst and solvent pairing is critical for optimal yield and selectivity; proper choice of nonpolar solvent provided improved yield through suppression of an oxidative side reaction, while employment of a cooperative catalytic approach through inclusion of a hydrogen bond donor cocatalyst significantly improved enantioselectivity.


Asunto(s)
Aldehídos/química , Catálisis , Oxidación-Reducción , Protones , Estereoisomerismo
14.
Occup Med (Lond) ; 67(1): 68-70, 2017 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-27694374

RESUMEN

BACKGROUND: Physicians are not immune to cognitive impairment. Because of the risks created by practising doctors with these issues, some have suggested developing objective, population-specific measures of evaluation and screening guidelines to assess dysfunction. However, there is very little published information from which to construct such resources. AIMS: To highlight the presentation characteristics and provide evaluation recommendations specific to the needs of physicians with actual or presumed cognitive impairment. METHODS: A retrospective database and chart review of cognitively impaired doctors who presented to a physician health programme (PHP). Complex cases were highlighted using simple descriptives and clinical vignettes. RESULTS: A total of 124 cases were included. Clients presented with a variety of issues other than cognitive concerns. We identified four principal domains of impairment: (i) diseases of (or in) the brain (48%); (ii) mood/ anxiety disorders or treatment side effects (28%); (iii) substance use (9%) and (iv) traumatic brain injury (7%). Age was not a good predictor of impairment and brief screening using the Montreal Cognitive Assessment demonstrated a ceiling effect with this cohort. Although many clients underwent some type of professional or personal transition, impairment did not necessarily indicate worse functioning after care. CONCLUSIONS: Physician cognitive evaluations should consider a variety of secondary sources of information, particularly vocational performance reports. It may take time before cognitive impairment can be diagnosed or ruled-out in this population. Prior assumptions, especially for non-cognitive referrals, can lead to inaccurate diagnosis and referrals. PHPs must manage cognitive cases carefully, not only in their clinical complexity but also in their psychosocial aspects.


Asunto(s)
Trastornos del Conocimiento/diagnóstico , Estado de Salud , Médicos , Humanos , Tamizaje Masivo/métodos , Estudios Retrospectivos
15.
J Fish Biol ; 90(5): 2097-2110, 2017 May.
Artículo en Inglés | MEDLINE | ID: mdl-28239865

RESUMEN

This study sought to observe the effects of submerged weight and frontal cross-sectional area of external telemetry packages on the kinematics, activity levels and swimming performance of small-bodied juvenile sharks, using lemon sharks Negaprion brevirostris (60-80 cm total length, LT ) as a model species. Juveniles were observed free-swimming in a mesocosm untagged and with small and large external accelerometer packages that increased frontal cross-sectional area of the animals and their submerged weight. Despite adhering to widely used standards for tag mass, the presence of an external telemetry package altered swimming kinematics, activity levels and swimming performance of juvenile N. brevirostris relative to untagged individuals, suggesting that tag mass is not a suitable standalone metric of device suitability. Changes in swimming performance could not be detected from tail-beat frequency, which suggests that tail-beat frequency is an unsuitable standalone metric of swimming performance for small N. brevirostris. Lastly, sharks experienced treatment-specific changes in activity level and swimming kinematics from morning to afternoon observation. Therefore, the presence of external telemetry packages altered the kinematics, activity levels and swimming performance of small young-of-the-year N. brevirostris and these data may therefore be relevant to other similar-sized juveniles of other shark species.


Asunto(s)
Tiburones/anatomía & histología , Tiburones/fisiología , Natación/fisiología , Telemetría/veterinaria , Animales , Fenómenos Biomecánicos , Peso Corporal , Telemetría/instrumentación
16.
Mol Ecol ; 24(24): 6177-87, 2015 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-26547143

RESUMEN

Populations of organisms routinely face abiotic selection pressures, and a central goal of evolutionary biology is to understand the mechanistic underpinnings of adaptive phenotypes. Ultraviolet radiation (UVR) is one of earth's most pervasive environmental stressors, potentially damaging DNA in any organism exposed to solar radiation. We explored mechanisms underlying differential survival following UVR exposure in genotypes of the water flea Daphnia melanica derived from natural ponds of differing UVR intensity. The UVR tolerance of a D. melanica genotype from a high-UVR habitat depended on the presence of visible and UV-A light wavelengths necessary for photoenzymatic repair of DNA damage, a repair pathway widely shared across the tree of life. We then measured the acquisition and repair of cyclobutane pyrimidine dimers, the primary form of UVR-caused DNA damage, in D. melanica DNA following experimental UVR exposure. We demonstrate that genotypes from high-UVR habitats repair DNA damage faster than genotypes from low-UVR habitats in the presence of visible and UV-A radiation necessary for photoenzymatic repair, but not in dark treatments. Because differences in repair rate only occurred in the presence of visible and UV-A radiation, we conclude that differing rates of DNA repair, and therefore differential UVR tolerance, are a consequence of variation in photoenzymatic repair efficiency. We then rule out a simple gene expression hypothesis for the molecular basis of differing repair efficiency, as expression of the CPD photolyase gene photorepair did not differ among D. melanica lineages, in both the presence and absence of UVR.


Asunto(s)
Daño del ADN/efectos de la radiación , Reparación del ADN , Daphnia/genética , Rayos Ultravioleta , Animales , Daphnia/efectos de la radiación , Ecosistema , Femenino , Genotipo , Modelos Genéticos , Modelos Estadísticos , Fenotipo , Dímeros de Pirimidina/genética
17.
Bioorg Med Chem Lett ; 24(16): 3968-73, 2014 Aug 15.
Artículo en Inglés | MEDLINE | ID: mdl-25017033

RESUMEN

TASK-1 is a two-pore domain potassium channel that is important to modulating cell excitability, most notably in the context of neuronal pathways. In order to leverage TASK-1 for therapeutic benefit, its physiological role needs better characterization; however, designing selective inhibitors that avoid the closely related TASK-3 channel has been challenging. In this study, a series of bis-amide derived compounds were found to demonstrate improved TASK-1 selectivity over TASK-3 compared to reported inhibitors. Optimization of a marginally selective hit led to analog 35 which displays a TASK-1 IC50=16 nM with 62-fold selectivity over TASK-3 in an orthogonal electrophysiology assay.


Asunto(s)
Amidas/farmacología , Proteínas del Tejido Nervioso/antagonistas & inhibidores , Bloqueadores de los Canales de Potasio/farmacología , Canales de Potasio de Dominio Poro en Tándem/antagonistas & inhibidores , Amidas/síntesis química , Amidas/química , Relación Dosis-Respuesta a Droga , Humanos , Estructura Molecular , Proteínas del Tejido Nervioso/metabolismo , Bloqueadores de los Canales de Potasio/síntesis química , Bloqueadores de los Canales de Potasio/química , Canales de Potasio de Dominio Poro en Tándem/metabolismo , Relación Estructura-Actividad
18.
Vaccines (Basel) ; 12(4)2024 Apr 10.
Artículo en Inglés | MEDLINE | ID: mdl-38675783

RESUMEN

Human papillomavirus (HPV) is the most common sexually transmitted infection in the United States; yet, despite the availability of safe and effective HPV vaccines, only half of eligible adolescents have completed the vaccine series. School-entry requirements are one proven strategy to increase vaccination rates among children and youth and reduce the burden of HPV-related cancer. This study investigated community perceptions of an HPV vaccine school-entry mandate in Virginia and the consequences of a low threshold exemption option included in the legislation. We conducted 40 interviews with community members including 15 interviews with parents, 19 with healthcare providers, and 6 with community leaders. Interviews asked about knowledge, beliefs, and attitudes concerning the HPV vaccine and mandate. Interviews were recorded, transcribed, and thematically analyzed. Despite healthcare provider support for the mandate, there was widespread confusion over the school-entry policy and concern that the exemption option undermined vaccination efforts. Understanding variations in community-level perceptions and response to school-based vaccination mandates is crucial for designing effective public health strategies. Findings suggest statewide vaccination initiatives should preemptively identify low uptake areas and provide targeted information to communities. Future mandates should avoid the use of ambiguous and contradictory language in vaccine-related legislation.

19.
J Am Board Fam Med ; 36(6): 892-904, 2024 Jan 05.
Artículo en Inglés | MEDLINE | ID: mdl-38092433

RESUMEN

BACKGROUND: Primary care is the foundation of health care, resulting in longer lives and improved equity. Primary care was the frontline of the COVID-19 pandemic public response and essential for access to care. Yet primary care faces substantial structural and systemic challenges. As part of a longitudinal analysis to track the capacity and health of primary care, we surveyed every primary care practice in Virginia in 2018 and again in 2022. METHODS: Surveys were emailed or mailed up to 6 times and nonresponders received a phone call. Questions assessed organizational characteristics, scope of care, capacity, and organizational stress in the prior year. From respondents, 39 clinicians, nurses, staff, administrators, and practice managers were interviewed. RESULTS: 526 out of 2296 primary care practices (23% response rate) completed the survey, with broad representation across geography, ownership, and payer mix. Compared with 2018, in 2022 there were increases in practices owned by health systems (25% vs 43%, P < .0001) and average percent of patients with Medicaid per practice (12% vs 22%, P < .0001). The percent of practices reporting any major stressor increased from 34% to 53% (P < .0001). The main increased stress was losing a clinician, with 13% of practices in 2018 versus 42% in 2022 reporting losing a clinician (P < .0001). CONCLUSIONS: Primary care practices are resilient and continue to serve their communities, including a broad scope of services and care for underserved people. However, the COVID-19 pandemic caused significant stress. With an increase in clinicians leaving clinical practice, we anticipate worsening access to primary care.


Asunto(s)
COVID-19 , Medicaid , Estados Unidos/epidemiología , Humanos , Propiedad , Pandemias , Atención Primaria de Salud , COVID-19/epidemiología
20.
J Am Board Fam Med ; 37(1): 22-24, 2024 Mar 11.
Artículo en Inglés | MEDLINE | ID: mdl-38448235

RESUMEN

INTRODUCTION: Practice-based research networks (PBRNs) improve primary care by addressing issues that matter to clinicians. Building trust between researchers and care teams is essential to this process, which often requires visiting practices to cultivate relationships and perform research activities. However, in a recent study using practice facilitation to improve the delivery of a preventive service, the COVID-19 pandemic prompted us to convert all planned facilitation from an in-person to virtual format. This eliminated the need to commute by automobile to and from practices across the state, greatly reducing the carbon footprint of the study. METHODS: From practice facilitator field notes that detailed practice locations and number of sessions, we calculated the total number of driving miles averted by virtual facilitation. We then determined metric tons of carbon dioxide we avoided producing using the Environmental Protection Agency Greenhouse Gases Equivalencies Calculator. During post-intervention interviews, we assessed practices' perspectives and experiences with the virtual format. RESULTS: Three practice facilitators provided an average of 3.4 sessions for 64 practices. Virtual facilitation averted 32,574.8 drive miles and prevented the release of 12.7 metric tons of carbon dioxide, an offset equivalent to growing 210 trees for 10 years. Practices reported that virtual facilitation fostered greater engagement and allowed more clinicians and staff to attend sessions. DISCUSSION: Climate change poses a significant threat to the health of people and communities. Given their commitment to improving population health, it may be time for PBRNs to routinely assess their environmental impact and minimize preventable environmental costs.


Asunto(s)
Dióxido de Carbono , Atención Primaria de Salud , Humanos , Pandemias/prevención & control , Servicios Preventivos de Salud , Ambiente
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