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Annexin A2 (A2)-induced microdomain formation is a key step in biological processes such as Ca2+-mediated exocytosis in neuroendocrine cells. In this work, a total of 15 coarse-grained molecular dynamics simulations were performed on vesicle models having a diameter of approximately 250 Å for 15 µs each using the Martini2 force field. Five simulations were performed in the presence of 10 A2, 5 in the presence of A2 but absence of PIP2, and 5 simulations in the absence of A2 but presence of PIP2. Consistent results were generated among the simulations. A2-induced PIP2 microdomain formation was observed and shown to occur in three phases: A2-vesicle association, localized A2-induced PIP2 clustering, and A2 aggregation driving PIP2 microdomain formation. The relationship between A2 aggregation and PIP2 microdomain formation was quantitatively described using a novel method which calculated the variance among protein and lipid positions via the Fréchet mean. A large reduction in PIP2 variance was observed in the presence of A2 but not in its absence. This reduction in PIP2 variance was proportional to the reduction observed in A2 variance and demonstrates that the observed PIP2 microdomain formation is dependent upon A2 aggregation. The three-phase model of A2-induced microdomain formation generated in this work will serve as a valuable guide for further experimental studies and the development of novel A2 inhibitors. No microdomain formation was observed in the absence of A2 and minimal A2-membrane interaction was observed in the absence of PIP2.
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Anexina A2 , Simulação de Dinâmica Molecular , Anexina A2/metabolismo , Anexina A2/química , Fosfatidilinositol 4,5-Difosfato/metabolismo , Fosfatidilinositol 4,5-Difosfato/química , Microdomínios da Membrana/metabolismo , Microdomínios da Membrana/químicaRESUMO
Maternal exposure to microplastics and nanoplastics has been shown to result in fetal growth restriction in mice. In this study, we investigated the placental and fetal hemodynamic responses to plastics exposure in mice using high-frequency ultrasound. Healthy, pregnant CD-1 dams were given either 106 ng/L of 5 µm polystyrene microplastics or 106 ng/L of 50 nm polystyrene nanoplastics in drinking water throughout gestation and were compared with controls. Maternal exposure to both microplastics and nanoplastics resulted in evidence of placental dysfunction that was highly dependent on the particle size. The umbilical artery blood flow increased by 48% in the microplastic-exposed group and decreased by 25% in the nanoplastic-exposed group compared to controls (p < 0.05). The microplastic- and nanoplastic-exposed fetuses showed a significant decrease in the middle cerebral artery pulsatility index of 10% and 13%, respectively, compared to controls (p < 0.05), indicating vasodilation of the cerebral circulation, a fetal adaptation that is part of the brain sparing response to preserve oxygen delivery. Hemodynamic markers of placental dysfunction and fetal hypoxia were more pronounced in the group exposed to polystyrene nanoplastics, suggesting nanoplastic exposure during human pregnancy has the potential to disrupt fetal brain development, which in turn may cause suboptimal neurodevelopmental outcomes.
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Microplásticos , Plásticos , Gravidez , Feminino , Humanos , Animais , Camundongos , Poliestirenos/toxicidade , Placenta/irrigação sanguínea , Desenvolvimento FetalRESUMO
PURPOSE OF REVIEW: There has been much variability in the definition of double outlet right ventricle (DORV) spanning the last century. Historically, emphasis has been placed on the assignment of the great arteries to the right ventricle as a definition of DORV. In this review, we aim to underscore the importance of conal muscle, rather than rules surrounding assignment of great arteries to ventricles. We will be outlining the variability in patient anatomy that results from variations in conal muscle development in DORV, which may not fit perfectly into predefined constructs. This anatomic variability directly determines physiology and surgical repair options. RECENT FINDINGS: There is a growing appreciation of the utility of cross-sectional imaging in complex DORV, and the generation of patient-specific 3D models with virtual reality simulations for surgical planning. These models improve the prediction of candidacy for biventricular repair and allow the mapping of complex baffle pathways preoperatively. SUMMARY: DORV is not a disease entity in itself, but rather a vast spectrum of disorders associated with maldevelopment of conal muscle and often abnormal expansion of one the great vessels. Patient-specific 3D models will be crucial for improved surgical planning and patient outcomes.
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Dupla Via de Saída do Ventrículo Direito , Humanos , Dupla Via de Saída do Ventrículo Direito/cirurgia , Ventrículos do Coração/anormalidades , Imageamento Tridimensional , Procedimentos Cirúrgicos Cardíacos/métodosRESUMO
BACKGROUND: Continuous glucose monitor (CGM) use is increasing rapidly among people with type 2 diabetes, although little is known about predictors of CGM use beyond clinical and demographic information available in electronic medical records. Behavioral and psychosocial characteristics may also predict CGM use. OBJECTIVE: We examined clinical, psychosocial, and behavioral characteristics that may predict CGM use in adults with type 2 diabetes. DESIGN: This longitudinal observational study comprised a secondary analysis of data collected in a larger trial. Enrollment included HbA1c tests and surveys assessing demographic, clinical, psychosocial, and behavioral characteristics. We queried participants regarding their CGM use during the study on their final self-report surveys, 15 months post-enrollment. PARTICIPANTS: Participants were 245 community-dwelling adults with type 2 diabetes recruited from primary care. APPROACH: We used logistic regression to predict CGM use during the 15-month trial period from baseline characteristics. KEY RESULTS: Around one-third of participants (37.1%; 91/245) started CGM. Predictors of starting CGM in bivariate models included younger age, higher socioeconomic status, insulin use, higher HbA1c, and more diabetes distress. When including all potential predictors in a single multivariable model, only younger age (aOR = 0.95, p = 0.001), insulin use (aOR = 2.33, p = 0.006), and higher socioeconomic status (aOR = 0.44, p = 0.037) were significant predictors. Despite the association between higher HbA1c and CGM use, neither diabetes self-care behaviors nor diabetes self-efficacy significantly predicted CGM use. Of participants who tried a CGM, 14.3% (13/91) had stopped, with cost being the most-cited reason. CONCLUSIONS: Even when including behavioral and psychological characteristics, younger age, using insulin, and higher socioeconomic status remain key predictors of CGM use. These findings emphasize the importance of access and affordability for people who may benefit from CGM. Providers should not bias their introduction of CGM towards those with (perceived or actual) optimal or sub-optimal self-care behaviors.
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Although spiders are one of the most diverse groups of arthropods, the genetic architecture of their evolutionary adaptations is largely unknown. Specifically, ancient genome-wide duplication occurring during arachnid evolution ~450 mya resulted in a vast assembly of gene families, yet the extent to which selection has shaped this variation is understudied. To aid in comparative genome sequence analyses, we provide a chromosome-level genome of the Western black widow spider (Latrodectus hesperus)-a focus due to its silk properties, venom applications, and as a model for urban adaptation. We used long-read and Hi-C sequencing data, combined with transcriptomes, to assemble 14 chromosomes in a 1.46 Gb genome, with 38,393 genes annotated, and a BUSCO score of 95.3%. Our analyses identified high repetitive gene content and heterozygosity, consistent with other spider genomes, which has led to challenges in genome characterization. Our comparative evolutionary analyses of eight genomes available for species within the Araneoidea group (orb weavers and their descendants) identified 1,827 single-copy orthologs. Of these, 155 exhibit significant positive selection primarily associated with developmental genes, and with traits linked to sensory perception. These results support the hypothesis that several traits unique to spiders emerged from the adaptive evolution of ohnologs-or retained ancestrally duplicated genes-from ancient genome-wide duplication. These comparative spider genome analyses can serve as a model to understand how positive selection continually shapes ancestral duplications in generating novel traits today within and between diverse taxonomic groups.
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Viúva Negra , Evolução Molecular , Duplicação Gênica , Genoma , Animais , Viúva Negra/genética , Cromossomos/genética , Filogenia , Transcriptoma , Aranhas/genética , Evolução Biológica , Anotação de Sequência Molecular , Seleção GenéticaRESUMO
Double inlet left ventricle (DILV) is a form of single ventricle heart disease where both atrioventricular valves enter a single left ventricle. Surgical intervention may be needed in the neonatal period secondary to systemic outflow tract obstruction or less commonly pulmonary obstruction. Two-dimensional echocardiography can adequately assess newborn anatomy and define the need for surgery. Beyond the newborn period, there is a renewed interest in septation of DILV using intracardiac baffles in a staged approach. Cross sectional imaging can aid in surgical planning. This article will review common anatomic features of DILV and imaging considerations for both single ventricle palliation and DILV septation.
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Baías , Ventrículos do Coração , Recém-Nascido , Humanos , Ventrículos do Coração/diagnóstico por imagem , Valvas Cardíacas , EcocardiografiaRESUMO
OBJECTIVE: Current methods used to measure incidence of traumatic brain injury (TBI) underestimate its true public health burden. The use of self-report surveys may be an approach to improve these estimates. An important step in public health surveillance is to define a public health problem using a case definition. The purpose of this article is to outline the process that the Centers for Disease Control and Prevention undertook to refine a TBI case definition to be used in surveillance using a self-report survey. SETTING: Survey. PARTICIPANTS: A total of 10 030 adults participated via a random digit-dial telephone survey from September 2018 to September 2019. MAIN MEASURES: Respondents were asked whether they had sustained a hit to the head in the preceding 12 months and whether they experienced a series of 12 signs and symptoms as a result of this injury. DESIGN: Head injuries with 1 or more signs/symptoms reported were initially categorized into a 3-tiered TBI case definition (probable TBI, possible TBI, and delayed possible TBI), corresponding to the level of certainty that a TBI occurred. Placement in a tier was compared with a range of severity measures (whether medical evaluation was sought, time to symptom resolution, self-rated social and work functioning); case definition tiers were then modified in a stepwise fashion to maximize differences in severity between tiers. RESULTS: There were statistically significant differences in the severity measure between cases in the probable and possible TBI tiers but not between other tiers. Timing of symptom onset did not meaningfully differentiate between cases on severity measures; therefore, the delayed possible tier was eliminated, resulting in 2 tiers: probable and possible TBI. CONCLUSION: The 2-tiered TBI case definition that was derived from this analysis can be used in future surveillance efforts to differentiate cases by certainty and from noncases for the purpose of reporting TBI prevalence and incidence estimates. The refined case definition can help researchers increase the confidence they have in reporting survey respondents' self-reported TBIs as well as provide them with the flexibility to report an expansive (probable + possible TBI) or more conservative (probable TBI only) estimate of TBI prevalence.
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Lesões Encefálicas Traumáticas , Lesões Encefálicas , Adulto , Humanos , Lesões Encefálicas Traumáticas/diagnóstico , Lesões Encefálicas Traumáticas/epidemiologia , Lesões Encefálicas/diagnóstico , Inquéritos e Questionários , Autorrelato , PrevalênciaRESUMO
PURPOSE: To describe the characteristics, management, and outcomes of pediatric patients with sporadic vestibular schwannoma (sVS). METHODS: This was a case series at a tertiary care center. Patients were identified through a research repository and chart review. Interventions were microsurgery, stereotactic radiosurgery (SRS), and observation. Outcome measures were tumor control, facial nerve function, and hearing. RESULTS: Eight patients over 2006-2022 fulfilled inclusion criteria (unilateral VS without genetic or clinical evidence of neurofibromatosis type 2 (NF2); age ≤ 21) with a mean age of 17 years (14-20). Average greatest tumor length in the internal auditory canal was 9.7 mm (4.0-16.1). Average greatest tumor dimension (4/8 tumors) in the cerebellopontine angle was 19.1 mm (11.3-26.8). Primary treatment was microsurgery in five (62.5%) patients, observation in two (25%), and SRS in one (12.5%). Four (80%) surgical patients had gross total resections, and one (20%) had regrowth post-near total resection and underwent SRS. One observed patient and the primary SRS patient have remained radiographically stable for 3.5 and 7 years, respectively. The other observed patient required surgery for tumor growth after 12 months of observation. Two surgical patients had poor facial nerve outcomes. All post-procedural patients developed anacusis. Mean follow-up was 3 years (0.5-7). CONCLUSIONS: We describe one of the largest reported cohorts of pediatric sVS in the USA. Diligent exclusion of NF2 is critical. Given the high likelihood of eventually requiring intervention and known adverse effects of SRS, microsurgery remains the preferred treatment. However, observation can be considered in select situations.
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Neurofibromatose 2 , Neuroma Acústico , Radiocirurgia , Humanos , Criança , Adolescente , Neuroma Acústico/cirurgia , Neuroma Acústico/patologia , Neurofibromatose 2/cirurgia , Nervo Facial/cirurgia , Audição , Microcirurgia/métodos , Radiocirurgia/métodos , Resultado do Tratamento , Estudos Retrospectivos , SeguimentosRESUMO
OBJECTIVES: This study aimed to identify enablers and barriers to participation in MRI for clinical indications and scientific research, and to determine the perceptions of MRI performed during pregnancy. METHODS: We conducted a survey of 156 pregnant people in Newfoundland and Labrador including sociodemographic information, obstetrical history, MRI history, and willingness to participate in an MRI. Categorical variables were analyzed using a Fisher exact test and open-ended questions were analyzed using thematic analysis. RESULTS: In total, 80% of participants reported willingness to receive an MRI while pregnant for clinical indications compared to 24% for research. Only 10% reported prior knowledge about MRI during pregnancy and most participants (94%) wanted additional information from their physician before feeling comfortable with the procedure. Participants who knew someone with complications during pregnancy were more likely to be willing to participate in an MRI for research (uncorrected P < 0.05). Participants' positive perceptions towards MRI during pregnancy for clinical indications were that it was a necessary and useful procedure, while the negative perceptions identified MRI as unsafe. For research MRI, participants' positive perceptions included that it would add to the advancement of knowledge and the negative perceptions were that it was an unnecessary and risky procedure. CONCLUSIONS: Strategies are needed to improve patient knowledge about the benefits and safety of MRI during pregnancy. The present study suggests recruitment for research should incorporate education on safety concerns and relative risk, personal stories about the benefits of MRI in diagnosing pregnancy complications and should highlight the contribution to advancing scientific knowledge.
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Imageamento por Ressonância Magnética , Médicos , Feminino , Gravidez , Humanos , Terra Nova e Labrador , Inquéritos e QuestionáriosRESUMO
Background: Data modernization efforts to strengthen surveillance capacity could help assess trends in use of preventive services and diagnoses of new chronic disease during the COVID-19 pandemic, which broadly disrupted health care access. Methods: This cross-sectional study examined electronic health record data from US adults aged 21 to 79 years in a large national research network (PCORnet), to describe use of 8 preventive health services (Nâ=â30,783,825 patients) and new diagnoses of 9 chronic diseases (Nâ=â31,588,222 patients) during 2018 through 2022. Joinpoint regression assessed significant trends, and health debt was calculated comparing 2020 through 2022 volume to prepandemic (2018 and 2019) levels. Results: From 2018 to 2022, use of some preventive services increased (hemoglobin A1c and lung computed tomography, both P < .05), others remained consistent (lipid testing, wellness visits, mammograms, Papanicolaou tests or human papillomavirus tests, stool-based screening), and colonoscopies or sigmoidoscopies declined (P < .01). Annual new chronic disease diagnoses were mostly stable (6% hypertension; 4% to 5% cholesterol; 4% diabetes; 1% colonic adenoma; 0.1% colorectal cancer; among women, 0.5% breast cancer), although some declined (lung cancer, cervical intraepithelial neoplasia or carcinoma in situ, cervical cancer, all P < .05). The pandemic resulted in health debt, because use of most preventive services and new diagnoses of chronic disease were less than expected during 2020; these partially rebounded in subsequent years. Colorectal screening and colonic adenoma detection by age group aligned with screening recommendation age changes during this period. Conclusion: Among over 30 million patients receiving care during 2018 through 2022, use of preventive services and new diagnoses of chronic disease declined in 2020 and then rebounded, with some remaining health debt. These data highlight opportunities to augment traditional surveillance with EHR-based data.
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COVID-19 , Serviços Preventivos de Saúde , Humanos , Pessoa de Meia-Idade , Estados Unidos/epidemiologia , Doença Crônica/epidemiologia , Doença Crônica/prevenção & controle , Serviços Preventivos de Saúde/estatística & dados numéricos , Serviços Preventivos de Saúde/tendências , Estudos Transversais , Adulto , Feminino , Idoso , COVID-19/epidemiologia , COVID-19/prevenção & controle , Masculino , SARS-CoV-2 , Adulto Jovem , Registros Eletrônicos de Saúde , PandemiasRESUMO
OBJECTIVE: Studies have suggested an association between prenatal care (PNC) and preterm birth (PTB). We evaluated trends in PTB and association of PNC and PTB. STUDY DESIGN: This was a retrospective cohort study of singleton, viable nonanomalous deliveries from 1991 to 2018. PNC utilization was defined by World Health Organization using number of visits: adequate (≥8), suboptimal (5-7), and inadequate (<5). Primary outcome was PTB. Tests of trend were used to assess changes in PTB over time. Baseline characteristics and outcomes were compared. Logistic regression estimated the association of PNC and PTB. We evaluated for effect modification by year of birth. RESULTS: Of 92,294 patients, 14,057 (15%) had PTB. Inadequate and suboptimal PNC were associated with higher odds of PTB compared to adequate PNC (adjusted odds ratios = [aOR 6.21], 95% confidence interval [CI]: 5.84-6.60; aOR = 3.57, 95% CI: 3.36-3.79). Inadequate PNC was associated with higher odds of PTB over time (effect modification p < 0.0001). Inadequate PNC was associated with 5.4 times higher odds of PTB in 1998, 7.0 times in 2008, and 9.1 times in 2018. CONCLUSION: Despite an increase in adequate PNC, there was a rise in PTB associated with inadequate and suboptimal PNC. PNC utilization was a stronger risk factor in recent years with higher PTB in patients who attended more than five PNC visits. KEY POINTS: · PNC utilization is associated with the risk of PTB.. · Despite an increase in PNC utilization, PTB rates have increased.. · There is an even stronger association between PNC utilization and PTB over time..
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Nascimento Prematuro , Cuidado Pré-Natal , Humanos , Feminino , Nascimento Prematuro/epidemiologia , Gravidez , Estudos Retrospectivos , Cuidado Pré-Natal/estatística & dados numéricos , Adulto , Modelos Logísticos , Recém-Nascido , Adulto Jovem , Aceitação pelo Paciente de Cuidados de Saúde/estatística & dados numéricos , Fatores de Risco , Razão de ChancesRESUMO
Objective: Despite the commonly observed co-occurrence of obsessive-compulsive symptoms (OCS) and substance use in clinical populations, few researchers have examined potential mechanisms which contribute to this relationship. This study assessed the mediating role of drinking motives in the relationship between OCS, alcohol consumption, and its resulting health risks among U.S. adults. Methods: Adult participants (n = 1966; Mage = 47.72, SD = 17.91; 76.30% female; 86.10% non-Hispanic White) sourced from Research Match answered an online questionnaire containing measures related to substance use and anxiety-related symptoms. Results: As hypothesized, there was a significant positive indirect path between OCS and both alcohol consumption and risky alcohol use through coping motives. However, there were also small indirect effects of OCS through social motivations for consumption and conformity motivations for risky alcohol use. Conclusions: These results add evidence that coping motives play a role in OCS and alcohol misuse and highlights the need to also consider drinking motives related to social facilitation and conformity in those with co-occurring OCS and alcohol misuse.
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Adaptação Psicológica , Consumo de Bebidas Alcoólicas , Alcoolismo , Motivação , Transtorno Obsessivo-Compulsivo , Humanos , Feminino , Masculino , Adulto , Pessoa de Meia-Idade , Transtorno Obsessivo-Compulsivo/psicologia , Consumo de Bebidas Alcoólicas/psicologia , Alcoolismo/psicologia , Adulto Jovem , Inquéritos e Questionários , Ansiedade/psicologiaRESUMO
Background: Many university students pregame or drink before a social event. Pregaming carries some risk due to its link to heavy drinking. During the COVID-19 pandemic, there was limited access to many drinking venues (e.g., bars/clubs). Moreover, universities shifted to a virtual format and imposed restrictions on in-person gatherings resulting in the reliance on virtual platforms for class instruction, meetings, and social events. The pandemic facilitated changes in students' drinking behaviors, stress levels, and how they maintained social contact with others. Thus, it is conceivable that during an academic pandemic year, students may have engaged in the act of drinking before attending a virtual social event. Objectives: In the present study, we examined the factor structures/item loadings of the Pregaming Motives Measure-Virtual (PGMM-V) among students (N = 283; Mage = 21.38; women = 69.3%; White = 45.4%, Hispanic = 40.8%) from seven universities who completed an online questionnaire (Spring/Summer-2021). Items from the original Pregaming Motives Measure (Bachrach et al., 2012) were modified to reflect motives to drink before attending a virtual social event. Results: We found evidence for a 2-factor structure model of the PGMM-V which includes social/enhancement and social ease/stress. Bivariate correlations indicated that social/enhancement and social ease/stress were (a) positively associated with frequency of drinking and alcohol consumption prior to attending virtual social events, and (b) general drinking motives (social/enhancement/coping) that align with these motives. Conclusions: The PGMM-V is a promising instrument that could be used in future research designed to understand students' pregaming behaviors for virtual social events as the use of such platforms are increasingly relied upon for social engagement.
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Consumo de Álcool na Faculdade , COVID-19 , Humanos , Feminino , Universidades , Pandemias , Consumo de Bebidas Alcoólicas , Motivação , Estudantes , Adaptação Psicológica , Comportamento SocialRESUMO
BACKGROUND: Children aged 0-4 years have the highest rate of emergency department (ED) visits for traumatic brain injury (TBI); falls are the leading cause. Infants younger than 2 years are more likely to sustain a fractured skull after a fall. OBJECTIVE: This study examined caregiver actions and products associated with ED visits for fall-related fractured skulls in infants aged 0-4 months. METHODS: Data were analyzed from the 2001-2017 National Electronic Injury Surveillance System-All Injury Program. Case narratives of infants aged 0-4 months who visited an ED for a fall-related skull fracture were examined to code caregiver actions preceding the fall. Product codes determined fall location and product type involved (e.g., flooring, bed, or stairs). All national estimates were weighted. RESULTS: There were more than 27,000 ED visits (weighted estimate) of infants aged 0-4 months for a nonfatal fall-related fractured skull between 2001 and 2017. Most were younger than 2 months (46.7%) and male (54.4%). Falls occurred primarily in the home (69.9%) and required hospitalization (76.4%). Primary caregiver actions coded involved placing (58.6%), dropping (22.7%), and carrying an infant (16.6%). Floor surfaces were the most common product (mentioned in 24.0% of the cases). CONCLUSIONS: Fall-related fractured skulls are a health and developmental concern for infants, highlighting the importance of a comprehensive assessment at the time of the injury to better understand adult actions. Findings indicated the need to develop prevention messages that include safe carrying and placement of infants.
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Acidentes por Quedas , Serviço Hospitalar de Emergência , Fraturas Cranianas , Humanos , Lactente , Serviço Hospitalar de Emergência/estatística & dados numéricos , Serviço Hospitalar de Emergência/organização & administração , Acidentes por Quedas/estatística & dados numéricos , Masculino , Feminino , Fraturas Cranianas/etiologia , Recém-Nascido , Visitas ao Pronto SocorroRESUMO
BACKGROUND: This study compares the outcomes of osteocutaneous radial forearm free flap (OC-RFFF) and fibula free flap (FFF) reconstruction of mandibular osteoradionecrosis (ORN). METHODS: Retrospective review of patients undergoing OC-RFFF/FFF reconstruction for mandible ORN between 2005 and 2020 at a tertiary center. Patient characteristics, postoperative complications, and functional outcomes were evaluated using chi-squared and logistic regression analysis. RESULTS: Fifty-six patients were included (OC-RFFF: 38; FFF: 18). Significantly more OC-RFFF patients had lateral mandible defects (94% vs. 61%, p = 0.0014). There were significantly more patients with exposed intraoral bone in the OC-RFFF group (23% vs. 0% p = 0.02), but no significant differences in hardware complications or flap failure. Donor site partial skin graft loss was more common in the FFF group (22% vs. 2.6%, p = 0.016), but no other significant differences in donor site morbidity were seen. Bivariable analysis showed no impact of flap type, tobacco/alcohol use, diabetes, or hypothyroidism on postoperative complications. Sixty percent of OC-RFFF, and 67% of FFF, patients resumed an oral diet after surgery. Oral diet was not impacted by flap type (OR = 0.769, 95% CI = 0.201-2.706, p = 0.688). CONCLUSION: The OC-RFFF is an acceptable option in the reconstruction of ORN involving the lateral mandible, though there is increased risk of bone exposure. These findings can help guide surgeon selection of microvascular free flap donor sites and appropriate patient counseling.
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Fíbula , Antebraço , Retalhos de Tecido Biológico , Osteorradionecrose , Humanos , Osteorradionecrose/cirurgia , Osteorradionecrose/etiologia , Retalhos de Tecido Biológico/transplante , Masculino , Estudos Retrospectivos , Feminino , Fíbula/transplante , Pessoa de Meia-Idade , Antebraço/cirurgia , Idoso , Doenças Mandibulares/cirurgia , Doenças Mandibulares/etiologia , Resultado do Tratamento , Reconstrução Mandibular/métodos , Complicações Pós-Operatórias/etiologia , Complicações Pós-Operatórias/epidemiologia , Procedimentos de Cirurgia Plástica/métodos , AdultoRESUMO
INTRODUCTION: Plastics used in everyday materials accumulate as waste in the environment and degrade over time. The impacts of the resulting particulate micro- and nanoplastics on human health remain largely unknown. In pregnant mice, we recently demonstrated that exposure to nanoplastics throughout gestation and during lactation resulted in changes in brain structure detected on MRI. One possible explanation for this abnormal postnatal brain development is altered fetal brain metabolism. OBJECTIVES: To determine the effect of maternal exposure to nanoplastics on fetal brain metabolism. METHODS: Healthy pregnant CD-1 mice were exposed to 50 nm polystyrene nanoplastics at a concentration of 106 ng/L through drinking water during gestation. Fetal brain samples were collected at embryonic day 17.5 (n = 18-21 per group per sex) and snap-frozen in liquid nitrogen. Magic angle spinning nuclear magnetic resonance was used to determine metabolite profiles and their relative concentrations in the fetal brain. RESULTS: The relative concentrations of gamma-aminobutyric acid (GABA), creatine and glucose were found to decrease by 40%, 21% and 30% respectively following maternal nanoplastic exposure when compared to the controls (p < 0.05). The change in relative concentration of asparagine with nanoplastic exposure was dependent on fetal sex (p < 0.005). CONCLUSION: Maternal exposure to polystyrene nanoplastics caused abnormal fetal brain metabolism in mice. The present study demonstrates the potential impacts of nanoplastic exposure during fetal development and motivates further studies to evaluate the risk to human pregnancies.
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Microplásticos , Poliestirenos , Gravidez , Humanos , Feminino , Animais , Camundongos , Exposição Materna/efeitos adversos , Metabolômica , EncéfaloRESUMO
BACKGROUND: Clinical trials indicate continuous glucose monitor (CGM) use may benefit adults with type 2 diabetes, but CGM rates and correlates in real-world care settings are unknown. OBJECTIVE: We sought to ascertain prevalence and correlates of CGM use and to examine rates of new CGM prescriptions across clinic types and medication regimens. DESIGN: Retrospective cohort using electronic health records in a large academic medical center in the Southeastern US. PARTICIPANTS: Adults with type 2 diabetes and a primary care or endocrinology visit during 2021. MAIN MEASURES: Age, gender, race, ethnicity, insurance, clinic type, insulin regimen, hemoglobin A1c values, CGM prescriptions, and prescribing clinic type. KEY RESULTS: Among 30,585 adults with type 2 diabetes, 13% had used a CGM. CGM users were younger and more had private health insurance (p < .05) as compared to non-users; 72% of CGM users had an intensive insulin regimen, but 12% were not taking insulin. CGM users had higher hemoglobin A1c values (both most recent and most proximal to the first CGM prescription) than non-users. CGM users were more likely to receive endocrinology care than non-users, but 23% had only primary care visits in 2021. For each month in 2021, a mean of 90.5 (SD 12.5) people started using CGM. From 2020 to 2021, monthly rates of CGM prescriptions to new users grew 36% overall, but 125% in primary care. Most starting CGM in endocrinology had an intensive insulin regimen (82% vs. 49% starting in primary care), whereas 28% starting CGM in primary care were not using insulin (vs. 5% in endocrinology). CONCLUSION: CGM uptake for type 2 diabetes is increasing rapidly, with most growth in primary care. These trends present opportunities for healthcare system adaptations to support CGM use and related workflows in primary care to support growth in uptake.
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Diabetes Mellitus Tipo 1 , Diabetes Mellitus Tipo 2 , Hipoglicemia , Adulto , Humanos , Diabetes Mellitus Tipo 2/tratamento farmacológico , Diabetes Mellitus Tipo 2/epidemiologia , Hemoglobinas Glicadas , Diabetes Mellitus Tipo 1/tratamento farmacológico , Hipoglicemia/epidemiologia , Estudos Retrospectivos , Automonitorização da Glicemia , Glicemia , Insulina/uso terapêutico , Atenção Primária à Saúde , Hipoglicemiantes/uso terapêuticoRESUMO
PURPOSE OF REVIEW: Diabetes is a chronic condition that requires consistent self-management for optimal health outcomes. People with diabetes are prone to burnout, cognitive burden, and sub-optimal performance of self-management tasks. Interventions that focus on habit formation have the potential to increase engagement by facilitating automaticity of self-management task performance. The purpose of this review is to (1) clarify the conceptualizations of habit formation and behavioral automaticity in the context of health behavior interventions, (2) review the evidence of habit in relation to behaviors relevant to diabetes self-management, and (3) discuss opportunities for incorporating habit formation and automaticity into diabetes self-management interventions. RECENT FINDINGS: Modern habit research describes a habit as a behavior that results over time from an automatic mental process. Automatic behaviors are experienced as cue-dependent, goal-independent, unconscious, and efficient. Habit formation requires context-dependent repetition to form cue-behavior associations. Results of diabetes habit studies are mixed. Observational studies have shown positive associations between habit strength and target self-management behaviors such as taking medication and monitoring blood glucose, as well as glycemic outcomes such as HbA1c. However, intervention studies conducted in similar populations have not demonstrated a significant benefit of habit-forming interventions compared to controls, possibly due to varying techniques used to promote habit formation. Automaticity of self-management behaviors has the potential to minimize the burden associated with performance of self-management tasks and ultimately improve outcomes for people with diabetes. Future studies should focus on refining interventions focused on context-dependent repetition to promote habit formation and better measurement of habit automaticity in diabetes self-management.
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Diabetes Mellitus , Autogestão , Humanos , Comportamentos Relacionados com a Saúde , Diabetes Mellitus/terapia , HábitosRESUMO
Mangosteen (Garcinia mangostana L.), also known as the "queen of fruits", is a tropical fruit of the Clusiacea family. While native to Southeast Asian countries, such as Thailand, Indonesia, Malaysia, Myanmar, Sri Lanka, India, and the Philippines, the fruit has gained popularity in the United States due to its health-promoting attributes. In traditional medicine, mangosteen has been used to treat a variety of illnesses, ranging from dysentery to wound healing. Mangosteen has been shown to exhibit numerous biological and pharmacological activities, such as antioxidant, anti-inflammatory, antibacterial, antifungal, antimalarial, antidiabetic, and anticancer properties. Disease-preventative and therapeutic properties of mangosteen have been ascribed to secondary metabolites called xanthones, present in several parts of the tree, including the pericarp, fruit rind, peel, stem bark, root bark, and leaf. Of the 68 mangosteen xanthones identified so far, the most widely-studied are α-mangostin and γ-mangostin. Emerging studies have found that mangosteen constituents and phytochemicals exert encouraging antineoplastic effects against a myriad of human malignancies. While there are a growing number of individual research papers on the anticancer properties of mangosteen, a complete and critical evaluation of published experimental findings has not been accomplished. Accordingly, the objective of this work is to present an in-depth analysis of the cancer preventive and anticancer potential of mangosteen constituents, with a special emphasis on the associated cellular and molecular mechanisms. Moreover, the bioavailability, pharmacokinetics, and safety of mangosteen-derived agents together with current challenges and future research avenues are also discussed.
Assuntos
Garcinia mangostana , Xantonas , Humanos , Garcinia mangostana/química , Garcinia mangostana/metabolismo , Xantonas/farmacologia , Xantonas/uso terapêutico , Disponibilidade Biológica , Frutas/química , Extratos Vegetais/farmacologiaRESUMO
Introduction: Maternal deaths increased in the United States during 2018-2021, with documented racial disparities. Respectful maternity care is a component of quality care that includes preventing harm and mistreatment, engaging in effective communication, and providing care equitably. Improving respectful maternity care can be part of multilevel strategies to reduce pregnancy-related deaths. Methods: CDC analyzed data from the PN View Moms survey administered during April 24-30, 2023, to examine the following components of respectful care: 1) experiences of mistreatment (e.g., violations of physical privacy, ignoring requests for help, or verbal abuse), 2) discrimination (e.g., because of race, ethnicity or skin color; age; or weight), and 3) reasons for holding back from communicating questions or concerns during maternity (pregnancy or delivery) care. Results: Among U.S. mothers with children aged <18 years, 20% reported mistreatment while receiving maternity care for their youngest child. Approximately 30% of Black, Hispanic, and multiracial respondents and approximately 30% of respondents with public insurance or no insurance reported mistreatment. Discrimination during the delivery of maternity care was reported by 29% of respondents. Approximately 40% of Black, Hispanic, and multiracial respondents reported discrimination, and approximately 45% percent of all respondents reported holding back from asking questions or discussing concerns with their provider. Conclusions and implications for public health practice: Approximately one in five women reported mistreatment during maternity care. Implementing quality improvement initiatives and provider training to encourage a culture of respectful maternity care, encouraging patients to ask questions and share concerns, and working with communities are strategies to improve respectful maternity care.