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1.
Curr Dev Nutr ; 8(4): 102134, 2024 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-38584676

RESUMO

Female cancer survivors have a higher chance of experiencing infertility than females without a history of cancer diagnosis. This risk remains high despite advances in fertility treatments. There is a need to augment fertility treatments with cost-effective methods such as nutritional guidance to improve fertility chances. The aim of this review article is to connect the current literature on cancer survivorship nutrition and fertility nutrition, focusing on the importance of integrating nutritional guidance into fertility counseling, assessment, and treatment for female cancer survivors. Consuming a healthful diet comprising whole grains, soy, fruits, vegetables, seafood, and unsaturated fats has improved both female fertility and cancer survivorship. Similarly, maintaining a healthy body weight also improves female fertility and cancer survivorship. Therefore, dietary interventions to support female cancer survivors with fertility challenges are of immense importance. The period of follow-up fertility counseling and assessment after cancer treatment may provide a unique opportunity for implementing nutritional guidance for female cancer survivors. Dietary interventions are a promising strategy to improve pregnancy chances and overall quality of life among female cancer survivors; thus, researchers should investigate perceptions regarding fertility, barriers, and challenges to changing nutrition-related behaviors, and preferences for nutritional guidance to support fertility treatments in this population.

2.
J Autism Dev Disord ; 2023 Dec 18.
Artigo em Inglês | MEDLINE | ID: mdl-38113012

RESUMO

Children with autism frequently present with complex mental health diagnoses and psychotropic medications are often a component of comprehensive biopsychosocial treatment plans for these conditions. The purpose of this study is to provide rates and patterns of psychotropic medication use, and predictors thereof, in children and youth with autism enrolled in Medicaid across the US. This study examined national Medicaid claims from 2008 to 2016 of all children and youth with autism ages 0-21 years enrolled in Medicaid. Psychotropic medication use was examined across several child and youth characteristics, including age, co-occurring mental health conditions, sex, and race and ethnicity. About half of children and youth with autism enrolled in Medicaid had at least one psychotropic prescription in a year, a number that decreased slightly across the study period due to decreases in the prescription of antipsychotics. As new medications for autism or co-occurring conditions are developed and deployed, and as the understanding of the characteristics of the population of children with autism evolves, studying rates of medication usage helps to understand utilization patterns and differences in access to quality care.

3.
J Trauma Acute Care Surg ; 93(6): 846-853, 2022 12 01.
Artigo em Inglês | MEDLINE | ID: mdl-35916626

RESUMO

INTRODUCTION: The 2016 National Academies of Science, Engineering and Medicine report included a proposal to establish a National Trauma Research Action Plan. In response, the Department of Defense funded the Coalition for National Trauma Research to generate a comprehensive research agenda spanning the continuum of trauma and burn care from prehospital care to rehabilitation as part of an overall strategy to achieve zero preventable deaths and disability after injury. The Postadmission Critical Care Research panel was 1 of 11 panels constituted to develop this research agenda. METHODS: We recruited interdisciplinary experts in surgical critical care and recruited them to identify current gaps in clinical critical care research, generate research questions, and establish the priority of these questions using a consensus-driven Delphi survey approach. The first of four survey rounds asked participants to generate key research questions. On subsequent rounds, we asked survey participants to rank the priority of each research question on a 9-point Likert scale, categorized to represent low-, medium-, and high-priority items. Consensus was defined as ≥60% of panelists agreeing on the priority category. RESULTS: Twenty-five subject matter experts generated 595 questions. By Round 3, 249 questions reached ≥60% consensus. Of these, 22 questions were high, 185 were medium, and 42 were low priority. The clinical states of hypovolemic shock and delirium were most represented in the high-priority questions. Traumatic brain injury was the only specific injury pattern with a high-priority question. CONCLUSION: The National Trauma Research Action Plan critical care research panel identified 22 high-priority research questions, which, if answered, would reduce preventable death and disability after injury. LEVEL OF EVIDENCE: Diagnostic Tests or Criteria; Level IV.


Assuntos
Cuidados Críticos , Projetos de Pesquisa , Humanos , Técnica Delphi , Consenso , Inquéritos e Questionários
4.
Cells Tissues Organs ; 211(2): 193-211, 2022.
Artigo em Inglês | MEDLINE | ID: mdl-33691313

RESUMO

Epithelial remodelling plays a crucial role during development. The ability of epithelial sheets to temporarily lose their integrity as they fuse with other epithelial sheets underpins events such as the closure of the neural tube and palate. During fusion, epithelial cells undergo some degree of epithelial-mesenchymal transition (EMT), whereby cells from opposing sheets dissolve existing cell-cell junctions, degrade the basement membrane, extend motile processes to contact each other, and then re-establish cell-cell junctions as they fuse. Similar events occur when an epithelium is wounded. Cells at the edge of the wound undergo a partial EMT and migrate towards each other to close the gap. In this review, we highlight the emerging role of Netrins in these processes, and provide insights into the possible signalling pathways involved. Netrins are secreted, laminin-like proteins that are evolutionarily conserved throughout the animal kingdom. Although best known as axonal chemotropic guidance molecules, Netrins also regulate epithelial cells. For example, Netrins regulate branching morphogenesis of the lung and mammary gland, and promote EMT during Drosophila wing eversion. Netrins also control epithelial fusion during optic fissure closure and inner ear formation, and are strongly implicated in neural tube closure and secondary palate closure. Netrins are also upregulated in response to organ damage and epithelial wounding, and can protect against ischemia-reperfusion injury and speed wound healing in cornea and skin. Since Netrins also have immunomodulatory properties, and can promote angiogenesis and re-innervation, they hold great promise as potential factors in future wound healing therapies.


Assuntos
Células Epiteliais , Cicatrização , Animais , Células Epiteliais/metabolismo , Epitélio , Morfogênese , Netrinas/metabolismo , Cicatrização/fisiologia
5.
Avian Dis ; 65(1): 86-89, 2021 03.
Artigo em Inglês | MEDLINE | ID: mdl-34339127

RESUMO

A 9-yr-old female black-footed African penguin (Spheniscus demersus) was presented for necropsy after a history of reproductive abnormalities, paresis of limbs, weakness, and sudden death. Postmortem examination revealed soft keel, collapsed rib cage with beading of the ribs, and bilateral parathyroid enlargement. Classic histologic lesions of fibrous osteodystrophy with osteomalacia were observed in the ribs, vertebrae, and to a lesser extent in the femur and tibiotarsus associated with hyperplasia of parathyroid glands. This represents the first report of nutritional secondary hyperparathyroidism in birds of the order Spheniciformes, most likely caused by low levels of calcium supplementation during egg laying. The reproductive abnormalities observed in this penguin and others from the same group (asynchronous egg-laying cycles, abnormal breeding behavior) were most likely exacerbated by the lack of an adequate photoperiod mimicking the natural daylight pattern.


Reporte de caso­Hiperparatiroidismo secundario nutricional y osteodistrofia fibrosa en un pingüino africano (Spheniscus demersus) en cautiverio similar a la osteomalacia observada en de aves de corral. Una hembra de pingüino africano de patas negras (Spheniscus demersus) de nueve años fue sometida a necropsia después de un historial de anomalías reproductivas, paresia de extremidades, debilidad y muerte súbita. El examen post mortem reveló que la quilla del esternón estaba blanda, la caja torácica colapsada, se observaron "perlas raquíticas" en las costillas y agrandamiento bilateral de las paratiroides. Se observaron lesiones histológicas clásicas de osteodistrofia fibrosa con osteomalacia en las costillas, vértebras y en menor medida, en el fémur y tibiotarsus asociadas con hiperplasia de glándulas paratiroides. Esto representa el primer informe de hiperparatiroidismo secundario nutricional en un ave del orden Spheniciformes, muy probablemente causado por un bajo nivel de suplementos de calcio durante la producción de huevos. Las anomalías reproductivas observadas en este pingüino y otros del mismo grupo (ciclos de puesta de huevos asincrónicos, comportamiento de reproducción anormal) probablemente se vieron exacerbadas por la falta de un fotoperíodo adecuado que imitara el patrón de luz natural.


Assuntos
Doenças das Aves/diagnóstico , Hiperparatireoidismo Secundário/veterinária , Osteomalacia/veterinária , Spheniscidae , Animais , Animais de Zoológico , Doenças das Aves/etiologia , Doenças das Aves/patologia , Evolução Fatal , Feminino , Hiperparatireoidismo Secundário/diagnóstico , Hiperparatireoidismo Secundário/etiologia , Hiperparatireoidismo Secundário/patologia , Osteomalacia/diagnóstico , Osteomalacia/etiologia , Osteomalacia/patologia
6.
G3 (Bethesda) ; 10(12): 4459-4471, 2020 12 03.
Artigo em Inglês | MEDLINE | ID: mdl-33051260

RESUMO

Epigenetic silencing by Polycomb group (PcG) complexes can promote epithelial-mesenchymal transition (EMT) and stemness and is associated with malignancy of solid cancers. Here we report a role for Drosophila PcG repression in a partial EMT event that occurs during wing disc eversion, an early event during metamorphosis. In a screen for genes required for eversion we identified the PcG genes Sexcombs extra (Sce) and Sexcombs midleg (Scm) Depletion of Sce or Scm resulted in internalized wings and thoracic clefts, and loss of Sce inhibited the EMT of the peripodial epithelium and basement membrane breakdown, ex vivo. Targeted DamID (TaDa) using Dam-Pol II showed that Sce knockdown caused a genomic transcriptional response consistent with a shift toward a more stable epithelial fate. Surprisingly only 17 genes were significantly upregulated in Sce-depleted cells, including Abd-B, abd-A, caudal, and nubbin Each of these loci were enriched for Dam-Pc binding. Of the four genes, only Abd-B was robustly upregulated in cells lacking Sce expression. RNAi knockdown of all four genes could partly suppress the Sce RNAi eversion phenotype, though Abd-B had the strongest effect. Our results suggest that in the absence of continued PcG repression peripodial cells express genes such as Abd-B, which promote epithelial state and thereby disrupt eversion. Our results emphasize the important role that PcG suppression can play in maintaining cell states required for morphogenetic events throughout development and suggest that PcG repression of Hox genes may affect epithelial traits that could contribute to metastasis.


Assuntos
Proteínas de Drosophila , Drosophila , Proteínas do Grupo Polycomb , Animais , Drosophila/genética , Proteínas de Drosophila/genética , Transição Epitelial-Mesenquimal/genética , Complexo Repressor Polycomb 1 , Proteínas do Grupo Polycomb/genética
7.
Sci Rep ; 9(1): 4110, 2019 03 11.
Artigo em Inglês | MEDLINE | ID: mdl-30858446

RESUMO

Neogenin1 (NEO1) is a receptor of the Deleted in Colorectal Carcinoma (DCC)/Frazzled/UNC-40 family, which regulates axon guidance but can also stabilize epithelial adherens junctions. NEO1 and DCC are also tumor suppressors that can inhibit metastasis by acting as dependence receptors. Given the role of NEO1 in maintaining adherens junctions we tested whether loss of NEO1 also promoted metastasis via an epithelial mesenchymal transition (EMT). Loss of NEO1 disrupted zonula adherens but tight junctions were unaffected. Neo1-depleted epithelial cells exhibited a more migratory morphology, had reduced F-actin rich stress-fibres and more basal lamellipodia. Microtubule density was decreased while microtubule outgrowth was faster. Live imaging showed that Neo1-depleted epithelial islands had increased lateral movement. Western blots and immunostaining revealed increased expression of mesenchymal markers such as Fibronectin and MMP1. Furthermore, RNA-seq analysis showed a striking decrease in expression of genes associated with oxidative phosphorylation, and increased expression of genes associated with EMT, locomotion, and wound-healing. In summary, loss of NEO1 in intestinal epithelial cells produces a partial EMT response, based on gene expression, cellular morphology and behaviour and cytoskeletal distribution. These results suggest that loss of NEO1 in carcinomas may contribute to metastasis by promoting a partial EMT and increased motility.


Assuntos
Neoplasias Colorretais/metabolismo , Neoplasias Colorretais/patologia , Transição Epitelial-Mesenquimal , Proteínas do Tecido Nervoso/deficiência , Receptores de Superfície Celular/deficiência , Cicatrização , Junções Aderentes/metabolismo , Apoptose/genética , Células CACO-2 , Movimento Celular/genética , Respiração Celular/genética , Células Epiteliais/metabolismo , Matriz Extracelular/metabolismo , Regulação da Expressão Gênica , Técnicas de Silenciamento de Genes , Genoma Humano , Humanos , Mesoderma/metabolismo , Proteínas Associadas aos Microtúbulos/metabolismo , Microtúbulos/metabolismo , Proteínas do Tecido Nervoso/metabolismo , Fenótipo , Análise de Componente Principal , Receptores de Superfície Celular/metabolismo , Fibras de Estresse/metabolismo , Transcriptoma/genética
8.
PLoS One ; 13(3): e0194003, 2018.
Artigo em Inglês | MEDLINE | ID: mdl-29518139

RESUMO

Netrin receptors of the DCC/NEO/UNC-40/Frazzled family have well established roles in cell migration and axon guidance but can also regulate epithelial features such as adhesion, polarity and adherens junction (AJ) stability. Previously, we have shown that overexpression of Drosophila Frazzled (Fra) in the peripodial epithelium (PE) inhibits wing disc eversion and also generates cellular protrusions typical of motile cells. Here, we tested whether the molecular pathways by which Fra inhibits eversion are distinct from those driving motility. We show that in disc proper (DP) epithelial cells Fra, in addition to inducing F-Actin rich protrusions, can affect localization of AJ components and columnar cell shape. We then show that these phenotypes have different requirements for the three conserved Fra cytoplasmic P-motifs and for downstream genes. The formation of protrusions required the P3 motif of Fra, as well as integrins (mys and mew), the Rac pathway (Rac1, wave and, arpc3) and myosin regulatory light chain (Sqh). In contrast, apico-basal cell shape change, which was accompanied by increased myosin phosphorylation, was critically dependent upon the P1 motif and was promoted by RhoGef2 but inhibited by Rac1. Fra also caused a loss of AJ proteins (DE-Cad and Arm) from basolateral regions of epithelial cells. This phenotype required all 3 P-motifs, and was dependent upon the polarity factor par6. par6 was not required for protrusions or cell shape change, but was required to block eversion suggesting that control of AJ components may underlie the ability of Fra to promote epithelial stability. The results imply that multiple molecular pathways act downstream of Fra in epithelial cells.


Assuntos
Caderinas/metabolismo , Proteínas de Drosophila/fisiologia , Drosophila melanogaster/metabolismo , Células Epiteliais/citologia , Receptores de Netrina/fisiologia , Junções Aderentes/metabolismo , Motivos de Aminoácidos , Animais , Animais Geneticamente Modificados , Proteínas do Domínio Armadillo/metabolismo , Proteínas de Ciclo Celular , Movimento Celular , Polaridade Celular , Forma Celular , Extensões da Superfície Celular/metabolismo , Proteínas de Drosophila/química , Proteínas de Drosophila/genética , Proteínas de Drosophila/metabolismo , Drosophila melanogaster/citologia , Drosophila melanogaster/genética , Drosophila melanogaster/crescimento & desenvolvimento , Células Epiteliais/metabolismo , Regulação da Expressão Gênica no Desenvolvimento , Discos Imaginais/citologia , Integrinas/fisiologia , Larva , Miosinas/metabolismo , Receptores de Netrina/química , Receptores de Netrina/genética , Fosforilação , Processamento de Proteína Pós-Traducional , Proteínas Recombinantes/metabolismo , Transdução de Sinais , Fatores de Transcrição/metabolismo , Transgenes , Proteínas rac de Ligação ao GTP/fisiologia , Proteínas rho de Ligação ao GTP/fisiologia
9.
J Wildl Dis ; 53(2): 215-227, 2017 04.
Artigo em Inglês | MEDLINE | ID: mdl-28151078

RESUMO

We characterize Brucella infection in a wild southern sea otter ( Enhydra lutris nereis) with osteolytic lesions similar to those reported in other marine mammals and humans. This otter stranded twice along the central California coast, US over a 1-yr period and was handled extensively at two wildlife rehabilitation facilities, undergoing multiple surgeries and months of postsurgical care. Ultimately the otter was euthanized due to severe, progressive neurologic disease. Necropsy and postmortem radiographs revealed chronic, severe osteoarthritis spanning the proximal interphalangeal joint of the left hind fifth digit. Numerous coccobacilli within the joint were strongly positive on Brucella immunohistochemical labelling, and Brucella sp. was isolated in pure culture from this lesion. Sparse Brucella-immunopositive bacteria were also observed in the cytoplasm of a pulmonary vascular monocyte, and multifocal granulomas were observed in the spinal cord and liver on histopathology. Findings from biochemical characterization, 16S ribosomal DNA, and bp26 gene sequencing of the bacterial isolate were identical to those from marine-origin brucellae isolated from cetaceans and phocids. Although omp2a gene sequencing revealed 100% homology with marine Brucella spp. infecting pinnipeds, whales, and humans, omp2b gene sequences were identical only to pinniped-origin isolates. Multilocus sequence typing classified the sea otter isolate as ST26, a sequence type previously associated only with cetaceans. Our data suggest that the sea otter Brucella strain represents a novel marine lineage that is distinct from both Brucella pinnipedialis and Brucella ceti. Prior reports document the zoonotic potential of the marine brucellae. Isolation of Brucella sp. from a stranded sea otter highlights the importance of wearing personal protective equipment when handling sea otters and other marine mammals as part of wildlife conservation and rehabilitation efforts.


Assuntos
Brucella/patogenicidade , Lontras/microbiologia , Animais , Animais Selvagens , Brucella/isolamento & purificação , California , Caniformia
10.
Cells Tissues Organs ; 203(2): 71-81, 2017.
Artigo em Inglês | MEDLINE | ID: mdl-28214893

RESUMO

Transitions between mesenchymal and epithelial cells are underpinned by changes in motility, adhesion, and polarity. Netrins and their receptors can control each of these cellular properties, and are emerging as important regulators of epithelial mesenchymal plasticity (EMP). Netrins were first identified in the worm Caenorhabditis elegans as secreted chemoattractants/repellents that could guide migrating mesodermal cells and axonal growth cones. Orthologues were subsequently found to play conserved roles in vertebrates and in the vinegar fly Drosophila. In the years that have followed it has become clear that, in addition to chemotaxis, netrin pathways have a number of other biological roles, many of which are directly relevant to the processes of EMP. Netrins and their receptors regulate morphogenesis of epithelial branched structures in the lung, mammary gland, pancreas, and vasculature, and can also promote the loss of epithelial structure. More recently they have been shown to drive apicobasal cell polarization events in vertebrates, flies, and worms. Given these many and varied roles in regulating epithelial morphogenetic events, together with their well-established roles in cell motility, netrins are likely to remain an important future avenue for EMP research.


Assuntos
Desenvolvimento Embrionário , Células Epiteliais/metabolismo , Mesoderma/metabolismo , Fatores de Crescimento Neural/metabolismo , Receptores de Superfície Celular/metabolismo , Animais , Células Epiteliais/citologia , Humanos , Mesoderma/citologia , Morfogênese , Receptores de Netrina
11.
Crit Care Med ; 44(11): 2079-2103, 2016 Nov.
Artigo em Inglês | MEDLINE | ID: mdl-27755068

RESUMO

OBJECTIVE: To update the 2002 version of "Clinical practice guidelines for sustained neuromuscular blockade in the adult critically ill patient." DESIGN: A Task Force comprising 17 members of the Society of Critical Medicine with particular expertise in the use of neuromuscular-blocking agents; a Grading of Recommendations Assessment, Development, and Evaluation expert; and a medical writer met via teleconference and three face-to-face meetings and communicated via e-mail to examine the evidence and develop these practice guidelines. Annually, all members completed conflict of interest statements; no conflicts were identified. This activity was funded by the Society for Critical Care Medicine, and no industry support was provided. METHODS: Using the Grading of Recommendations Assessment, Development, and Evaluation system, the Grading of Recommendations Assessment, Development, and Evaluation expert on the Task Force created profiles for the evidence related to six of the 21 questions and assigned quality-of-evidence scores to these and the additional 15 questions for which insufficient evidence was available to create a profile. Task Force members reviewed this material and all available evidence and provided recommendations, suggestions, or good practice statements for these 21 questions. RESULTS: The Task Force developed a single strong recommendation: we recommend scheduled eye care that includes lubricating drops or gel and eyelid closure for patients receiving continuous infusions of neuromuscular-blocking agents. The Task Force developed 10 weak recommendations. 1) We suggest that a neuromuscular-blocking agent be administered by continuous intravenous infusion early in the course of acute respiratory distress syndrome for patients with a PaO2/FIO2 less than 150. 2) We suggest against the routine administration of an neuromuscular-blocking agents to mechanically ventilated patients with status asthmaticus. 3) We suggest a trial of a neuromuscular-blocking agents in life-threatening situations associated with profound hypoxemia, respiratory acidosis, or hemodynamic compromise. 4) We suggest that neuromuscular-blocking agents may be used to manage overt shivering in therapeutic hypothermia. 5) We suggest that peripheral nerve stimulation with train-of-four monitoring may be a useful tool for monitoring the depth of neuromuscular blockade but only if it is incorporated into a more inclusive assessment of the patient that includes clinical assessment. 6) We suggest against the use of peripheral nerve stimulation with train of four alone for monitoring the depth of neuromuscular blockade in patients receiving continuous infusion of neuromuscular-blocking agents. 7) We suggest that patients receiving a continuous infusion of neuromuscular-blocking agent receive a structured physiotherapy regimen. 8) We suggest that clinicians target a blood glucose level of less than 180 mg/dL in patients receiving neuromuscular-blocking agents. 9) We suggest that clinicians not use actual body weight and instead use a consistent weight (ideal body weight or adjusted body weight) when calculating neuromuscular-blocking agents doses for obese patients. 10) We suggest that neuromuscular-blocking agents be discontinued at the end of life or when life support is withdrawn. In situations in which evidence was lacking or insufficient and the study results were equivocal or optimal clinical practice varies, the Task Force made no recommendations for nine of the topics. 1) We make no recommendation as to whether neuromuscular blockade is beneficial or harmful when used in patients with acute brain injury and raised intracranial pressure. 2) We make no recommendation on the routine use of neuromuscular-blocking agents for patients undergoing therapeutic hypothermia following cardiac arrest. 3) We make no recommendation on the use of peripheral nerve stimulation to monitor degree of block in patients undergoing therapeutic hypothermia. 4) We make no recommendation on the use of neuromuscular blockade to improve the accuracy of intravascular-volume assessment in mechanically ventilated patients. 5) We make no recommendation concerning the use of electroencephalogram-derived parameters as a measure of sedation during continuous administration of neuromuscular-blocking agents. 6) We make no recommendation regarding nutritional requirements specific to patients receiving infusions of neuromuscular-blocking agents. 7) We make no recommendation concerning the use of one measure of consistent weight over another when calculating neuromuscular-blocking agent doses in obese patients. 8) We make no recommendation on the use of neuromuscular-blocking agents in pregnant patients. 9) We make no recommendation on which muscle group should be monitored in patients with myasthenia gravis receiving neuromuscular-blocking agents. Finally, in situations in which evidence was lacking or insufficient but expert consensus was unanimous, the Task Force developed six good practice statements. 1) If peripheral nerve stimulation is used, optimal clinical practice suggests that it should be done in conjunction with assessment of other clinical findings (e.g., triggering of the ventilator and degree of shivering) to assess the degree of neuromuscular blockade in patients undergoing therapeutic hypothermia. 2) Optimal clinical practice suggests that a protocol should include guidance on neuromuscular-blocking agent administration in patients undergoing therapeutic hypothermia. 3) Optimal clinical practice suggests that analgesic and sedative drugs should be used prior to and during neuromuscular blockade, with the goal of achieving deep sedation. 4) Optimal clinical practice suggests that clinicians at the bedside implement measure to attenuate the risk of unintended extubation in patients receiving neuromuscular-blocking agents. 5) Optimal clinical practice suggests that a reduced dose of an neuromuscular-blocking agent be used for patients with myasthenia gravis and that the dose should be based on peripheral nerve stimulation with train-of-four monitoring. 6) Optimal clinical practice suggests that neuromuscular-blocking agents be discontinued prior to the clinical determination of brain death.


Assuntos
Estado Terminal , Bloqueio Neuromuscular , Bloqueadores Neuromusculares/uso terapêutico , Adulto , Analgésicos/uso terapêutico , Morte Encefálica , Feminino , Hemodinâmica , Humanos , Hipnóticos e Sedativos/uso terapêutico , Hipotermia Induzida , Miastenia Gravis/complicações , Bloqueadores Neuromusculares/farmacologia , Junção Neuromuscular/fisiologia , Monitoração Neuromuscular , Obesidade/complicações , Gravidez , Síndrome do Desconforto Respiratório/tratamento farmacológico , Estado Asmático/tratamento farmacológico , Assistência Terminal , Suspensão de Tratamento
13.
PLoS One ; 10(7): e0132987, 2015.
Artigo em Inglês | MEDLINE | ID: mdl-26207831

RESUMO

During tumorigenesis, pathways that promote the epithelial-to-mesenchymal transition (EMT) can both facilitate metastasis and endow tumor cells with cancer stem cell properties. To gain a greater understanding of how these properties are interlinked in cancers we used Drosophila epithelial tumor models, which are driven by orthologues of human oncogenes (activated alleles of Ras and Notch) in cooperation with the loss of the cell polarity regulator, scribbled (scrib). Within these tumors, both invasive, mesenchymal-like cell morphology and continual tumor overgrowth, are dependent upon Jun N-terminal kinase (JNK) activity. To identify JNK-dependent changes within the tumors we used a comparative microarray analysis to define a JNK gene signature common to both Ras and Notch-driven tumors. Amongst the JNK-dependent changes was a significant enrichment for BTB-Zinc Finger (ZF) domain genes, including chronologically inappropriate morphogenesis (chinmo). chinmo was upregulated by JNK within the tumors, and overexpression of chinmo with either RasV12 or Nintra was sufficient to promote JNK-independent epithelial tumor formation in the eye/antennal disc, and, in cooperation with RasV12, promote tumor formation in the adult midgut epithelium. Chinmo primes cells for oncogene-mediated transformation through blocking differentiation in the eye disc, and promoting an escargot-expressing stem or enteroblast cell state in the adult midgut. BTB-ZF genes are also required for Ras and Notch-driven overgrowth of scrib mutant tissue, since, although loss of chinmo alone did not significantly impede tumor development, when loss of chinmo was combined with loss of a functionally related BTB-ZF gene, abrupt, tumor overgrowth was significantly reduced. abrupt is not a JNK-induced gene, however, Abrupt is present in JNK-positive tumor cells, consistent with a JNK-associated oncogenic role. As some mammalian BTB-ZF proteins are also highly oncogenic, our work suggests that EMT-promoting signals in human cancers could similarly utilize networks of these proteins to promote cancer stem cell states.


Assuntos
Carcinogênese/genética , Proteínas de Drosophila/fisiologia , Genes ras/fisiologia , Oncogenes/fisiologia , Receptores Notch/fisiologia , Dedos de Zinco/genética , Animais , Animais Geneticamente Modificados , Proteínas de Drosophila/genética , Drosophila melanogaster , Perfilação da Expressão Gênica , Regulação Neoplásica da Expressão Gênica , Análise em Microsséries , Proteínas Nucleares/química , Proteínas Nucleares/genética , Domínios e Motivos de Interação entre Proteínas/genética
14.
Biol Open ; 4(2): 233-43, 2015 Jan 23.
Artigo em Inglês | MEDLINE | ID: mdl-25617422

RESUMO

Mesenchymal-epithelial transitions (METs) are important in both development and the growth of secondary tumours. Although the molecular basis for epithelial polarity is well studied, less is known about the cues that induce MET. Here we show that Netrins, well known as chemotropic guidance factors, provide a basal polarising cue during the Drosophila midgut MET. Both netrinA and netrinB are expressed in the visceral mesoderm, the substrate upon which midgut cells migrate, while their receptor frazzled (fra) is expressed in midgut cells. Netrins are required to polarise Fra to the basal surface, and Netrins and Fra undergo mutually-dependent endocytosis, with Fra subsequently trafficking to late endosomes. Mutations to fra and netrins affect both migration and MET but to different degrees. Loss of fra strongly delays migration, midgut cells fail to extend protrusions, and apico-basal polarisation of proteins and epithelium formation is inhibited. In netrin mutants, the migration phenotype is weaker and cells still extend protrusions. However, apico-basal polarisation of proteins, including Fra, and FActin is greatly disrupted and a monolayer fails to form. Delocalised accumulations of FActin are prevalent in netrin mutants but not fra mutants suggesting delocalised Fra may disrupt the MET. ßPS localisation is also affected in netrin mutants in that a basal gradient is reduced while localisation to the midgut/VM interface is increased. Since a similar effect is seen when endocytosis is inhibited, Netrin and Fra may regulate Integrin turnover. The results suggest Netrin-dependent basal polarisation of Fra is critical for the formation of an epithelium.

15.
Nat Commun ; 4: 2790, 2013.
Artigo em Inglês | MEDLINE | ID: mdl-24225841

RESUMO

Netrins are secreted chemoattractants with roles in axon guidance, cell migration and epithelial plasticity. Netrin-1 also promotes the survival of metastasized cells by inhibiting the pro-apoptotic effects of its receptor Deleted in Colorectal Carcinoma (DCC). Here we report that Netrins can also regulate epithelial dissociation during Drosophila wing eversion. During eversion, peripodial epithelial cells lose apico-basal polarity and adherens junctions, and become migratory and invasive--a process similar to an epithelial-mesenchymal transition. Loss of netrinA inhibits the breakdown of cell-cell junctions, leading to eversion failure. In contrast, the Netrin receptor Frazzled blocks eversion when overexpressed, whereas frazzled RNAi accelerates eversion in vitro. In peripodial cells Frazzled is endocytosed, and undergoes NetA-dependent degradation, which is required for eversion. Finally, we provide evidence that Frazzled acts through the ERM-family protein Moesin to inhibit eversion. This mechanism may also help explain the role of Netrin and DCC in cancer metastasis.


Assuntos
Junções Aderentes/fisiologia , Drosophila/metabolismo , Fatores de Crescimento Neural/metabolismo , Receptores de Superfície Celular/metabolismo , Proteínas Supressoras de Tumor/metabolismo , Asas de Animais/crescimento & desenvolvimento , Animais , Regulação para Baixo , Drosophila/crescimento & desenvolvimento , Proteínas de Drosophila , Epitélio/fisiologia , Feminino , Proteínas de Membrana/metabolismo , Metamorfose Biológica , Receptores de Netrina , Netrina-1 , Netrinas , Complexo de Endopeptidases do Proteassoma/metabolismo , Receptores de Superfície Celular/fisiologia
16.
Menopause ; 20(4): 443-7, 2013 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-23211877

RESUMO

OBJECTIVE: The purpose of this study was to assess the effect of soy isoflavone supplementation on quality of life in postmenopausal women. METHODS: A multicenter, randomized, double-blind, placebo-controlled 24-month trial was conducted to assess the effect of 80 or 120 mg of daily aglycone hypocotyl soy isoflavone supplementation on quality of life in 403 postmenopausal women using a validated Menopause-Specific Quality of Life questionnaire. RESULTS: Menopause-Specific Quality of Life domain scores at 1 year and 2 years were similar to baseline. There were no differences in domain scores among treatment groups. CONCLUSIONS: Soy isoflavone supplementation offers no benefit to quality of life in postmenopausal women.


Assuntos
Isoflavonas/administração & dosagem , Menopausa , Qualidade de Vida , beta-Glucanas/administração & dosagem , Adulto , Suplementos Nutricionais , Método Duplo-Cego , Endométrio/diagnóstico por imagem , Feminino , Humanos , Isoflavonas/efeitos adversos , Pessoa de Meia-Idade , Placebos , Inquéritos e Questionários , Resultado do Tratamento , Ultrassonografia , beta-Glucanas/efeitos adversos
17.
Psychol Rep ; 108(1): 3-13, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21526585

RESUMO

Little is known about the validity of Gilliam Asperger's Disorder Scale (GADS), although it is widely used. This study of 199 children with high functioning autism or Asperger's disorder, 195 with low functioning autism, and 83 with attention deficit hyperactivity disorder (ADHD) showed high classification accuracy (autism vs. ADHD) for clinicians' GADS Quotients (92%), and somewhat lower accuracy (77%) for parents' Quotients. Both children with high and low functioning autism had clinicians' Quotients (M=99 and 101, respectively) similar to the Asperger's Disorder mean of 100 for the GADS normative sample. Children with high functioning autism scored significantly higher on the cognitive patterns subscale than children with low functioning autism, and the latter had higher scores on the remaining subscales: social interaction, restricted patterns of behavior, and pragmatic skills. Using the clinicians' Quotient and Cognitive Patterns score, 70% of children were correctly identified as having high or low functioning autism or ADHD.


Assuntos
Síndrome de Asperger/diagnóstico , Transtorno do Deficit de Atenção com Hiperatividade/diagnóstico , Transtorno Autístico/diagnóstico , Transtornos Cognitivos/diagnóstico , Inteligência , Determinação da Personalidade/estatística & dados numéricos , Síndrome de Asperger/classificação , Síndrome de Asperger/psicologia , Transtorno do Deficit de Atenção com Hiperatividade/classificação , Transtorno do Deficit de Atenção com Hiperatividade/psicologia , Transtorno Autístico/classificação , Transtorno Autístico/psicologia , Criança , Pré-Escolar , Transtornos Cognitivos/classificação , Transtornos Cognitivos/psicologia , Feminino , Humanos , Masculino , Programas de Rastreamento , Variações Dependentes do Observador , Psicometria/estatística & dados numéricos , Reprodutibilidade dos Testes
18.
Am J Clin Nutr ; 93(2): 356-67, 2011 Feb.
Artigo em Inglês | MEDLINE | ID: mdl-21177797

RESUMO

BACKGROUND: Soy isoflavones are naturally occurring phytochemicals with weak estrogenic cellular effects. Despite numerous clinical trials of short-term isoflavone supplementation, there is a paucity of data regarding longer-term outcomes and safety. OBJECTIVE: Our aim was to evaluate the clinical outcomes of soy hypocotyl isoflavone supplementation in healthy menopausal women as a secondary outcome of a trial on bone health. DESIGN: A multicenter, randomized, double-blind, placebo-controlled 24-mo trial was conducted to assess the effects of daily supplementation with 80 or 120 mg aglycone equivalent soy hypocotyl isoflavones plus calcium and vitamin D on the health of 403 postmenopausal women. At baseline and after 1 and 2 y, clinical blood chemistry values were measured and a well-woman examination was conducted, which included a mammogram and a Papanicolaou test. A cohort also underwent transvaginal ultrasound measurements to assess endometrial thickness and fibroids. RESULTS: The baseline characteristics of the groups were similar. After 2 y of daily isoflavone exposure, all clinical chemistry values remained within the normal range. The only variable that changed significantly was blood urea nitrogen, which increased significantly after 2 y (P = 0.048) but not after 1 y (P = 0.343) in the supplementation groups. Isoflavone supplementation did not affect blood lymphocyte or serum free thyroxine concentrations. No significant differences in endometrial thickness or fibroids were observed between the groups. Two serious adverse events were detected (one case of breast cancer and one case of estrogen receptor-negative endometrial cancer), which was less than the expected population rate for these cancers. CONCLUSION: Daily supplementation for 2 y with 80-120 mg soy hypocotyl isoflavones has minimal risk in healthy menopausal women. This trial was registered at clinicaltrials.gov as NCT00665860.


Assuntos
Nitrogênio da Ureia Sanguínea , Suplementos Nutricionais , Glycine max/química , Isoflavonas/farmacologia , Fitoestrógenos/farmacologia , Extratos Vegetais/farmacologia , Pós-Menopausa/efeitos dos fármacos , beta-Glucanas/farmacologia , Método Duplo-Cego , Feminino , Humanos , Hipocótilo , Isoflavonas/efeitos adversos , Pessoa de Meia-Idade , Fitoestrógenos/efeitos adversos , Extratos Vegetais/efeitos adversos , beta-Glucanas/efeitos adversos
19.
J Cardiothorac Surg ; 5: 39, 2010 May 17.
Artigo em Inglês | MEDLINE | ID: mdl-20478064

RESUMO

Many patients with end-stage cardiomyopathy are now being implanted with Total Artificial Hearts (TAHs). We have observed individual cases of post-operative mechanical ventilator autocycling with a flow trigger, and subsequent loss of autocycling after switching to a pressure trigger. These observations prompted us to do a retrospective review of all TAH devices placed at our institution between August 2007 and May 2009. We found that in the immediate post-operative period following TAH placement, autocycling was present in 50% (5/10) of cases. There was immediate cessation of autocycling in all patients after being changed from a flow trigger of 2 L/minute to a pressure trigger of 2 cm H2O. The autocycling group was found to have significantly higher CVP values than the non-autocycling group (P = 0.012). Our data suggest that mechanical ventilator autocycling may be resolved or prevented by the use of a pressure trigger rather than a flow trigger setting in patients with TAHs who require mechanical ventilation.


Assuntos
Coração Artificial , Respiração Artificial/métodos , Adulto , Humanos , Intubação Intratraqueal , Respiração com Pressão Positiva , Ventilação Pulmonar
20.
J Cardiothorac Vasc Anesth ; 24(2): 285-92, 2010 Apr.
Artigo em Inglês | MEDLINE | ID: mdl-20036156

RESUMO

OBJECTIVE: To describe aspects of anesthesia for combined cardiac surgery and orthotopic liver transplant (OLT). DESIGN: Retrospective case series. SETTING: Hospital with cardiac surgery and liver transplant programs. PARTICIPANTS: Nine patients between September 1998 and July 2006. INTERVENTION: Combined cardiac surgery and OLT. MEASUREMENT AND MAIN RESULTS: Demographic and outcome data were recorded for each patient. Multiple intraoperative parameters were collected at baseline, after induction of anesthesia, after cardiac surgery, and after OLT. Five patients underwent combined OLT and coronary artery bypass graft (CABG) surgery. Four patients underwent combined OLT and aortic valve replacement (AVR) to relieve aortic stenosis. One of these 4 patients also had a saphenous vein graft to the left anterior descending artery. The CABG/OLT patients had hypertension, diabetes, or both, and multiple coronary arteries were affected although ejection fraction was preserved. The 1 death in this group was unrelated to a coronary event. The AVR/OLT patients had aortic stenosis that met American Heart Association guidelines for AVR. One death, within 24 hours of surgery, was associated with severe pulmonary artery hypertension. The median transfusion volumes were 12 units of packed red blood cells, 22 units of fresh frozen plasma, and 30 units of platelets. Three of the 9 patients required renal replacement therapy postoperatively. The median duration of intubation was 2 days, and length of stay in the intensive care unit was 5.5 days. CONCLUSION: Combined cardiac and OLT surgery is complex and serious morbidity occurs, but successful outcomes are attainable.


Assuntos
Anestesia Geral/métodos , Procedimentos Cirúrgicos Cardíacos/métodos , Transplante de Fígado/métodos , Idoso , Anestesia Geral/efeitos adversos , Anestesia Geral/mortalidade , Procedimentos Cirúrgicos Cardíacos/efeitos adversos , Procedimentos Cirúrgicos Cardíacos/mortalidade , Feminino , Humanos , Transplante de Fígado/efeitos adversos , Transplante de Fígado/mortalidade , Masculino , Pessoa de Meia-Idade , Cuidados Pré-Operatórios/efeitos adversos , Cuidados Pré-Operatórios/métodos , Cuidados Pré-Operatórios/mortalidade , Estudos Retrospectivos , Fatores de Risco
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