Your browser doesn't support javascript.
loading
Mostrar: 20 | 50 | 100
Resultados 1 - 20 de 59
Filtrar
1.
JAMA Netw Open ; 7(1): e2353264, 2024 Jan 02.
Artículo en Inglés | MEDLINE | ID: mdl-38270948

RESUMEN

Importance: Attitudes toward end-of-life decision-making in neonatology have been studied in physicians and other health care professionals and are mostly shaped by their clinical education and work experiences. In contrast, attitudes among the general public have not yet been investigated. Objective: To assess (1) attitudes in the general public toward euthanasia and withdrawal of life-prolonging treatment in neonates with severe life-limiting conditions, (2) knowledge of current German recommendations, and (3) values in the German society regarding ethical issues and proxy decisions at the beginning of life. Design, Setting, and Participants: This cross-sectional study was performed in Germany and used an exploratory design to analyze responses to an interview conducted by an independent, established commissioned polling institute in March and April 2022. Participants were 16 years or older, with German language fluency and comprehension and living in Germany. Main Outcomes and Measures: Knowledge about recommendations for euthanasia and withdrawal of life-prolonging treatment as well as personal attitudes toward (1) euthanasia and withdrawal of life-prolonging treatment and (2) surrogate end-of-life decision-making for newborn infants were assessed. Results: The study included 2116 participants (1077 females [50.9%]; mean [SD] age 52.1 [18.7] years). Of the participants, 16.8% (311 of 1851) reported knowing the German recommendations for euthanasia and withdrawal of life-prolonging treatment for neonates. Euthanasia and withdrawal of life-prolonging treatment were supported by 64.7% (1369 of 2116) and 77.9% (1649 of 2116) of respondents, respectively. Shared decision-making between parents and physicians for neonates in end-of-life situations was supported by 65.6% of participants (1388). In situations where shared decision-making was not possible, 73.4% of respondents (1019 of 1388) put the ultimate decision to the parents. The magnitude of the associations was low between sociodemographic factors and views on ethical issues and customary practices involved in end-of-life decisions for neonates. Conclusions and Relevance: Results of this cross-sectional study suggested that most respondents were not aware of the national German recommendations for euthanasia and withdrawal of life-prolonging treatment for sick and extremely preterm newborns. When counseling parents of periviable newborns, clinicians may need to exert more effort in explaining the legal and ethical framework; a highly individualized approach is warranted.


Asunto(s)
Muerte , Opinión Pública , Recién Nacido , Femenino , Lactante , Humanos , Persona de Mediana Edad , Estudios Transversales , Academias e Institutos , Directivas Anticipadas
2.
Artículo en Alemán | MEDLINE | ID: mdl-38253330

RESUMEN

OBJECTIVE: Various studies have shown that belonging to a professional group has an influence on ethical attitudes. The aim of this study was to assess and compare the attitudes and approaches of obstetrical specialists and prenatal diagnosticians in prenatal conflict situations. METHODS: Explorative cross-sectional online survey among tertiary perinatal care centers and prenatal diagnosticians with DEGUM Level II/III in Germany. The questionnaire included questions on ethical attitudes in the perinatal context and a case presentation of a fetal hypoplastic left heart syndrome. RESULTS: The response rate was 57.1% (310/543). 55.5% of the respondents practiced both obstetrics and prenatal diagnostics, 24.5% exclusively prenatal diagnostics, and 14.2% purely obstetrics. 27% agreed with the statement "An uncertain prognosis justifies pregnancy termination". For complex fetal malformations joint interdisciplinary counseling was advocated by 98.3%. Addressing the option of postnatal palliative treatment in a case of a hypoplastic left heart syndrome was accepted by 84.3% across all professional groups, while mentioning fetocide was more frequently cited as an option by prenatal diagnosticians than by obstetricians (57.7% vs. 34.1%). CONCLUSION: Interdisciplinary prenatal parental counseling in complex fetal malformations is uniformly advocated by prenatal diagnosticians and obstetricians in Germany. However, different ethical attitudes appear among specialists groups with regard to the option of termination of pregnancy.

3.
Front Cardiovasc Med ; 10: 1283992, 2023.
Artículo en Inglés | MEDLINE | ID: mdl-37900563

RESUMEN

Objective: To our knowledge, no prior study has focused on the outcome of PDA occlusion using an Amplatzer™ Vascular Plug 4 (AP4) in ill preterm infants. This study aims to highlight the pros and cons of AP4 in this cohort. Methods: Between 2020 and 2022, 26 ill preterm infants underwent PDA closure in our centre. The median age, weight, and gestational age were 60 days (11-180 days), 1,900g (900-3,400 g), and 25 weeks (22-33 weeks), respectively. The indication of the intervention was hemodynamically significant PDA. A medical trial with non-steroid medication failed to close the ducts in all patients. Follow-up using echocardiography was done 24, 48, and 72 h after the intervention. Results: Of 26 ducts, 21 were successfully closed with AP4. Five ducts shorter than 7 mm were unsuitable for AP4 and were closed with the Amplatzer Piccolo device. The median radiation time was 4 min (3-9 min). No early plug-related complications or deaths were documented. Plug-related jailing of the left pulmonary artery as a late complication was 9.5%, and LPA reintervention was required. All ducts were closed after 48 h. Conclusion: Implantation of the AP4 using a 4 F 0.38 guide wire-compatible catheter without inserting a long sheath makes the closure of tubular ducts with this device feasible and uncomplicated with a short intervention time. However, the limited sizes with fixed lengths of the AP4 make it unsuitable for ducts wider than 4.5 mm and shorter than the chosen device length, which can increase the risk of significant left pulmonary stenosis. A wide range of plug diameters and lengths is required to accommodate the large and short ducts.

4.
J Perinat Med ; 51(8): 1097-1103, 2023 Oct 26.
Artículo en Inglés | MEDLINE | ID: mdl-37256371

RESUMEN

OBJECTIVES: Antenatal treatment and information influences the course of pregnancy and parental decision-making in cases of threatened prematurity on the borderline of viability. Numerous studies have shown significant interprofessional differences in assessing ethical boundary decisions; hence, this study aimed to evaluate obstetricians attitudes, practices and antenatal parental counseling regarding threatened preterm birth in Germany. METHODS: An anonymous online questionnaire was administered to 543 obstetricians at tertiary perinatal centers and prenatal diagnostic centers in Germany. The survey contained questions on basic ethical issues assessed using the Likert scale and a case vignette regarding the practical procedures of an imminent extreme premature birth at 23 1/7 gestational weeks. RESULTS: In the case of unstoppable preterm birth, 15 % of clinicians said they would carry out a cesarean section; however, specialists from centers with a high number of very low birth weight infants would do so significantly more often. Among respondents, 29.8 % did not take any therapeutic measures without discussing the child's treatment options with their parents, 19.9 % refused to offer actionable advice to the parents, and 57 % said they would advise parents to seek intensive care treatment for the child with the option of changing treatment destination in the event of serious complications. Moreover, 84 % said they would provide information together with neonatologists. CONCLUSIONS: Joint counseling with neonatologists is widely accepted. The size of the perinatal center significantly influences the practical approach to threatened preterm births. Respect for parents' decision-making autonomy regarding the child's treatment options is central and influences therapy initiation.


Asunto(s)
Nacimiento Prematuro , Niño , Recién Nacido , Humanos , Femenino , Embarazo , Nacimiento Prematuro/prevención & control , Autoinforme , Cesárea , Obstetras , Recien Nacido Prematuro , Toma de Decisiones , Padres/psicología
6.
Cardiol Young ; 33(7): 1172-1176, 2023 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-35915979

RESUMEN

INTRODUCTION: Parental counselling after antenatal diagnosis of a congenital heart defect requires a high degree of professional and emotional competence and ultimately a sense of responsibility on the part of the consulting physicians. However, little is known about parents` perceptions and evaluation of these consultations. MATERIAL/METHODS: Survey on 425 women who received interdisciplinary counselling after antenatal diagnosis of a complex fetal congenital heart defect in a specialized prenatal outpatient clinic with an affiliated paediatric heart centre. Two questionnaires were used to retrospectively evaluate the parental perception and impact on counselling, particularly on decision-making. Questionnaires differed between women conceiving the child and women who terminated the pregnancy. RESULTS: 400 women continued, 25 women terminated the pregnancy after diagnosis and counselling. Good quality of life was reported for 68% of the children, 15% died postnatally in the further course. 95% rated the counselling as good or very good regardless of the child´s outcome. 73% described the counselling as highly important for their subsequent decision. The possibility of termination of pregnancy was discussed with 37% of the respondents, 22% of them found it outrageous or very distressing. Of all respondents, one woman would have made a different decision regarding continuation of the pregnancy in retrospect. CONCLUSION: Retrospectively, parents rate prenatal counselling extremely positively, irrespective of the severity of the child´s heart defect. It can be assumed that the consistent joint interdisciplinary consultation and the high reputation of the cooperating heart centre have had an influence on the below-average rate of termination of pregnancy.


Asunto(s)
Cardiopatías Congénitas , Calidad de Vida , Niño , Embarazo , Femenino , Humanos , Estudios Retrospectivos , Diagnóstico Prenatal , Cardiopatías Congénitas/diagnóstico , Consejo , Ultrasonografía Prenatal
7.
Nucleic Acids Res ; 49(17): 9821-9835, 2021 09 27.
Artículo en Inglés | MEDLINE | ID: mdl-34458909

RESUMEN

In the current meiotic recombination initiation model, the SPO11 catalytic subunits associate with MTOPVIB to form a Topoisomerase VI-like complex that generates DNA double strand breaks (DSBs). Four additional proteins, PRD1/AtMEI1, PRD2/AtMEI4, PRD3/AtMER2 and the plant specific DFO are required for meiotic DSB formation. Here we show that (i) MTOPVIB and PRD1 provide the link between the catalytic sub-complex and the other DSB proteins, (ii) PRD3/AtMER2, while localized to the axis, does not assemble a canonical pre-DSB complex but establishes a direct link between the DSB-forming and resection machineries, (iii) DFO controls MTOPVIB foci formation and is part of a divergent RMM-like complex including PHS1/AtREC114 and PRD2/AtMEI4 but not PRD3/AtMER2, (iv) PHS1/AtREC114 is absolutely unnecessary for DSB formation despite having a conserved position within the DSB protein network and (v) MTOPVIB and PRD2/AtMEI4 interact directly with chromosome axis proteins to anchor the meiotic DSB machinery to the axis.


Asunto(s)
Proteínas de Arabidopsis/metabolismo , Arabidopsis/genética , Roturas del ADN de Doble Cadena , Meiosis/genética , Proteínas de Arabidopsis/fisiología , Proteínas de Ciclo Celular/metabolismo , Cromatina/metabolismo , Reparación del ADN , Proteínas de Unión al ADN/metabolismo , Proteínas Tirosina Fosfatasas/fisiología , Recombinación Genética
8.
Plant J ; 106(3): 766-784, 2021 05.
Artículo en Inglés | MEDLINE | ID: mdl-33583065

RESUMEN

Copper (Cu) and iron (Fe) are essential for plant growth and are often in short supply under natural conditions. Molecular responses to simultaneous lack of both metals (-Cu-Fe) differ from those seen in the absence of either alone. Metabolome profiling of plant leaves previously revealed that fumarate levels fall under -Cu-Fe conditions. We employed lines lacking cytosolic FUMARASE2 (FUM2) activity to study the impact of constitutive suppression of cytosolic fumarate synthesis on plant growth under Cu and/or Fe deficiency. In fum2 mutants, photosynthesis and growth were less impaired under -Cu-Fe conditions than in wild-type (WT) seedlings. In particular, levels of photosynthetic proteins, chloroplast ultrastructure, amino acid profiles and redox state were less perturbed by simultaneous Cu-Fe deficiency in lines that cannot produce fumarate in the cytosol. Although cytosolic fumarate has been reported to promote acclimation of photosynthesis to low temperatures when metal supplies are adequate, the photosynthetic efficiency of fum2 lines grown under Cu-Fe deficiency in the cold was higher than in WT. Uptake and contents of Cu and Fe are similar in WT and fum2 plants under control and -Cu-Fe conditions, and lack of FUM2 does not alter the ability to sense metal deficiency, as indicated by marker gene expression. Collectively, we propose that reduced levels of cytosolic fumarate synthesis ultimately increase the availability of Fe for incorporation into metalloproteins.


Asunto(s)
Proteínas de Arabidopsis/fisiología , Arabidopsis/crecimiento & desarrollo , Cobre/deficiencia , Fumarato Hidratasa/fisiología , Hierro/metabolismo , Fotosíntesis , Aminoácidos/metabolismo , Arabidopsis/metabolismo , Proteínas de Arabidopsis/genética , Fumarato Hidratasa/genética , Fumaratos/metabolismo , Plantones/crecimiento & desarrollo , Plantones/metabolismo , Tilacoides/metabolismo
9.
J Matern Fetal Neonatal Med ; 34(24): 4053-4059, 2021 Dec.
Artículo en Inglés | MEDLINE | ID: mdl-31852290

RESUMEN

OBJECTIVE: To present emergency cerclage (EC) as a safe and effective therapeutic option for prevention of prematurity in women with advanced cervical dilation in second-trimester pregnancy. It is focused on seemingly futile situations like cervical dilation >5 cm, bulging membranes and multifetal pregnancies. The outcomes of interest are the prolongation of pregnancy, gestational age at delivery and neonatal morbidity and mortality related to distinct risk factors. STUDY DESIGN: Retrospective monocentric cohort study involving 130 pregnancies (105 single and 25 twin pregnancies) and 155 neonates by using a standardized protocol. Women between 18 and 28 gestational weeks with cervical shortening of <10 mm + cervical dilation >2 cm and/or bulging membranes were included. Analyses of maternal and neonatal parameters were done by chart review. RESULTS: The medium gestational age at delivery was 35 5/7 week with a medium interval from cerclage placement to delivery of 83 days. Overall, 46.5% (72/155) neonates were born beyond 37 weeks, extreme prematurity of less than 28 gestational weeks was observed in 14.8% (23/155), no miscarriage before 22 weeks was documented. The neonatal mortality was 1.9% (3/155). Neonatal deaths and morbidity was related to severe prematurity exclusively. The association of amnion-infection syndromes and failing therapy was significantly with respect to bulging membranes and advanced cervical dilation >5 cm. CONCLUSIONS: Even in futile cases EC can be an option to save the pregnancy and prevent severe prematurity. However, a standardized protocol is imminent for successful therapy and every indication has to be a case by case decision.


Asunto(s)
Cerclaje Cervical , Nacimiento Prematuro , Incompetencia del Cuello del Útero , Estudios de Cohortes , Femenino , Edad Gestacional , Humanos , Recién Nacido , Embarazo , Resultado del Embarazo/epidemiología , Nacimiento Prematuro/epidemiología , Nacimiento Prematuro/prevención & control , Estudios Retrospectivos
10.
Photosynth Res ; 147(1): 49-60, 2021 Jan.
Artículo en Inglés | MEDLINE | ID: mdl-33211260

RESUMEN

Photosynthesis and carbohydrate metabolism of higher plants need to be tightly regulated to prevent tissue damage during environmental changes. The intracellular position of chloroplasts changes due to a changing light regime. Chloroplast avoidance and accumulation response under high and low light, respectively, are well known phenomena, and deficiency of chloroplast movement has been shown to result in photodamage and reduced biomass accumulation. Yet, effects of chloroplast positioning on underlying metabolic regulation are less well understood. Here, we analysed photosynthesis together with metabolites and enzyme activities of the central carbohydrate metabolism during cold acclimation of the chloroplast unusual positioning 1 (chup1) mutant of Arabidopsis thaliana. We compared cold acclimation under ambient and low light and found that maximum quantum yield of PSII was significantly lower in chup1 than in Col-0 under both conditions. Our findings indicated that net CO2 assimilation in chup1 is rather limited by biochemistry than by photochemistry. Further, cold-induced dynamics of sucrose phosphate synthase differed significantly between both genotypes. Together with a reduced rate of sucrose cycling derived from kinetic model simulations our study provides evidence for a central role of chloroplast positioning for photosynthetic and metabolic acclimation to low temperature.


Asunto(s)
Proteínas de Arabidopsis/metabolismo , Arabidopsis/fisiología , Metabolismo de los Hidratos de Carbono , Proteínas de Cloroplastos/metabolismo , Regulación de la Expresión Génica de las Plantas , Proteínas de Microfilamentos/metabolismo , Fotosíntesis , Sacarosa/metabolismo , Arabidopsis/genética , Proteínas de Arabidopsis/genética , Proteínas de Cloroplastos/genética , Frío , Proteínas de Microfilamentos/genética , Mutación , Oxígeno/metabolismo , Fotosíntesis/fisiología , Hojas de la Planta/fisiología , Hojas de la Planta/efectos de la radiación
11.
Plant Direct ; 4(8): e00251, 2020 Aug.
Artículo en Inglés | MEDLINE | ID: mdl-32789285

RESUMEN

Acclimation to low but non-freezing temperature represents an ecologically important process for Arabidopsis thaliana but also for many other plant species from temperate regions. Cold acclimation comprises and affects numerous molecular and physiological processes and the maintenance of sugar supply of sink tissue by photosynthetically active source tissue is essential for plant survival. Here, changes in vascular bundle (VB) structure at the leaf petiole were analysed together with sucrose exudation rates before and after cold acclimation. Six natural Arabidopsis accessions originating from southern and northern Europe were compared. Photosynthetic efficiency, that is, maximum and effective quantum yield of photosystem II, revealed a significant effect of environmental condition. Only for northern accessions was a highly significant negative correlation observed between leaf sucrose exudation rates, xylem, and petiole cross-sectional areas. Furthermore, only for northern accessions was a significant increase of VB and leaf petiole cross-sectional area observed during cold acclimation. In contrast, variance of cross-sectional areas of cold acclimated southern accessions was strongly reduced compared to control plants, while mean areas remained similar under both conditions. In summary, these findings suggest that natural Arabidopsis accessions from northern Europe significantly adjust sink strength and leaf VB structure to maintain plant growth and photosynthesis under low temperature.

12.
Proc Natl Acad Sci U S A ; 117(12): 6918-6927, 2020 03 24.
Artículo en Inglés | MEDLINE | ID: mdl-32161131

RESUMEN

Singlet oxygen (1O2), the major reactive oxygen species (ROS) produced in chloroplasts, has been demonstrated recently to be a highly versatile signal that induces various stress responses. In the fluorescent (flu) mutant, its release causes seedling lethality and inhibits mature plant growth. However, these drastic phenotypes are suppressed when EXECUTER1 (EX1) is absent in the flu ex1 double mutant. We identified SAFEGUARD1 (SAFE1) in a screen of ethyl methanesulfonate (EMS) mutagenized flu ex1 plants for suppressor mutants with a flu-like phenotype. In flu ex1 safe1, all 1O2-induced responses, including transcriptional rewiring of nuclear gene expression, return to levels, such as, or even higher than, those in flu Without SAFE1, grana margins (GMs) of chloroplast thylakoids (Thys) are specifically damaged upon 1O2 generation and associate with plastoglobules (PGs). SAFE1 is localized in the chloroplast stroma, and release of 1O2 induces SAFE1 degradation via chloroplast-originated vesicles. Our paper demonstrates that flu-produced 1O2 triggers an EX1-independent signaling pathway and proves that SAFE1 suppresses this signaling pathway by protecting GMs.


Asunto(s)
Proteínas de Arabidopsis/metabolismo , Arabidopsis/crecimiento & desarrollo , Estrés Oxidativo , Sustancias Protectoras/metabolismo , Plantones/crecimiento & desarrollo , Oxígeno Singlete/toxicidad , Tilacoides/metabolismo , Arabidopsis/genética , Arabidopsis/metabolismo , Proteínas de Arabidopsis/genética , Cloroplastos/efectos de los fármacos , Cloroplastos/metabolismo , Cloroplastos/patología , Regulación de la Expresión Génica de las Plantas , Luz , Mutación , Especies Reactivas de Oxígeno/metabolismo , Plantones/genética , Plantones/metabolismo , Tilacoides/efectos de los fármacos , Tilacoides/patología
13.
Cardiol Young ; 30(4): 493-499, 2020 Apr.
Artículo en Inglés | MEDLINE | ID: mdl-32079550

RESUMEN

BACKGROUND: Post-operative severe vascular stenosis and proliferating endothelial tissue lead to severe circulatory disorders and impair organ perfusion. Bioabsorbable magnesium scaffolds may help to overcome these obstructions without leaving obstructing stent material. We analyse their role in the treatment of vascular stenosis in infants. METHODS: Since 2016, 15 magnesium scaffolds with a diameter of 3.5 mm were implanted in 9 patients aged 15 days to 7.6 years. Eight scaffolds were implanted in pulmonary venous restenoses, five in pulmonary arterial stenosis including one in-stent stenosis, one into a stenotic brachiocephalic artery, and one in a recurrent innominate vein thrombosis. RESULTS: All patients clinically improved after the implantation of a scaffold. The magnesium scaffolds lost integrity after 30-48 days (mean 42 days). The innominate vein thrombosed early, while all other vessels remained open. Two patients died after 1.3 and 14 weeks not related to the scaffolds. Five patients needed further balloon dilations or stent implantations after the scaffold had fractured. At first recatheterisation after in mean 2.5 months, the mean minimum/maximum diameter in relation to the scaffold's original diameter was 89%/99% in the arterial implantations (n = 6) and 66%/77% in the pulmonary venous implantations. CONCLUSIONS: The magnesium scaffolds can be used as a bridging solution to treat severe vascular stenosis in different locations. Restenosis can occur after degradation and make further interventions necessary, but neither vessel growth nor further interventions are hindered by stent material. Larger diameters may improve therapeutic options.


Asunto(s)
Implantes Absorbibles , Angioplastia de Balón/métodos , Stents Liberadores de Fármacos , Magnesio , Arteria Pulmonar/cirugía , Estenosis de Arteria Pulmonar/cirugía , Angiografía , Niño , Preescolar , Femenino , Humanos , Lactante , Recién Nacido , Masculino , Diseño de Prótesis , Arteria Pulmonar/diagnóstico por imagen , Estenosis de Arteria Pulmonar/diagnóstico , Resultado del Tratamiento
14.
Curr Biol ; 30(5): 840-853.e5, 2020 03 09.
Artículo en Inglés | MEDLINE | ID: mdl-32084398

RESUMEN

Twin arginine translocation (TAT) pathways have been extensively studied in bacteria and chloroplasts for their role in membrane translocation of folded proteins. However, an increasing number of organisms have been found to contain mitochondria-located TAT subunits, including plant mitochondria, which contain TAT subunits, though in an unusual arrangement with only TatB and TatC subunits. To date, no confirmed function has been attributed to mitochondrial TAT pathways in any organism. Using a truncation mutant approach, we demonstrate that the plant mitochondrial TatB (MTTATB) is required for complex III biogenesis. More specifically, MTTATB performs at a late stage in complex III biogenesis, conveying the translocation of the C terminus of the Rieske FeS subunit back across the inner membrane. This work confirms that plant mitochondria retained a functional TAT pathway for the Rieske FeS translocation, most likely from the original mitochondrial ancestor. It is hypothesized that the original mitochondria contained a bacteria-derived TAT pathway required for at least the Rieske FeS translocation. In several eukaryotic lineages, this mitochondrial TAT pathway was lost and replaced by BCS1. Interestingly, plant mitochondria appear to assemble complex III in the same subunit order as yeast and mammals but in contrast use bacteria-like assembly factors for this process.


Asunto(s)
Arabidopsis/fisiología , Arginina/metabolismo , Complejo III de Transporte de Electrones/metabolismo , Mitocondrias/metabolismo , Transporte de Proteínas , Transducción de Señal
15.
J Health Monit ; 5(3): 21-36, 2020 Sep.
Artículo en Inglés | MEDLINE | ID: mdl-35146271

RESUMEN

Numerous findings are known to exist between dietary habits, physical activity, and child and adolescent health. Here, we will use data from the most recent Health Behaviour in School-aged Children (HBSC) study to describe dietary habits and patterns of physical activity. Using the survey data for 11-, 13- and 15-year-old students from across Germany, we report findings for key indicators of diet and physical activity for the 2017/18 cycle. By comparing these findings with data from the 2009/10 and 2013/14 survey cycles, we also consider current trends. Results from the most recent cycle show that 10.0% of girls and 16.9% of boys meet the World Health Organization's (WHO) physical activity recommendations. Across all HBSC cycles, this is the lowest figure so far. Concerning dietary habits, 50.6% of girls and 59.0% of boys reported having breakfast every morning. Data for daily fruit, vegetable and soft drink consumption emphasises the need to promote a healthy diet among adolescents. For all indicators of physical activity and diet, differences between girls and boys are apparent. Girls' intake of fruit and vegetables is higher and they consume fewer soft drinks, yet boys are more physically active and have breakfast more regularly. For the majority of indicators of dietary habits and physical activity, considerable inequalities relating to family affluence are observed. An important implication of the study results for dietary habits and physical activity of older children and adolescents is the need to foster settings-based approaches to promote physical activity and a healthy diet that integrate a gender-sensitive perspective.

16.
Arch Dis Child Fetal Neonatal Ed ; 105(2): 190-195, 2020 Mar.
Artículo en Inglés | MEDLINE | ID: mdl-31248963

RESUMEN

OBJECTIVE: To determine if survival rates of preterm infants receiving active perinatal care improve over time. DESIGN: The German Neonatal Network is a cohort study of preterm infants with birth weight <1500 g. All eligible infants receiving active perinatal care are registered. We analysed data of patients discharged between 2011 and 2016. SETTING: 43 German level III neonatal intensive care units (NICUs). PATIENTS: 8222 preterm infants with a gestational age between 22/0 and 28/6 weeks who received active perinatal care. INTERVENTIONS: Participating NICUs were grouped according to their specific survival rate from 2011 to 2013 to high (percentile >P75), intermediate (P25-P75) and low (

Asunto(s)
Recien Nacido Extremadamente Prematuro , Unidades de Cuidado Intensivo Neonatal/estadística & datos numéricos , Atención Perinatal/métodos , Atención Perinatal/estadística & datos numéricos , Mortalidad Perinatal/tendencias , Causas de Muerte , Comorbilidad , Femenino , Edad Gestacional , Estado de Salud , Humanos , Lactante , Recién Nacido , Recién Nacido de muy Bajo Peso , Masculino , Estudios Prospectivos , Mejoramiento de la Calidad , Factores de Riesgo , Factores Sexuales , Centros de Atención Terciaria
17.
Plant Direct ; 3(7): e00153, 2019 Jul.
Artículo en Inglés | MEDLINE | ID: mdl-31360827

RESUMEN

Targeted integration of recombinant DNA fragments into plant genomes by DNA double-strand break (DSB) repair mechanisms has become a powerful tool for precision engineering of crops. However, many targeting platforms require the screening of many transgenic events to identify a low number of targeted events among many more random insertion events. We developed an engineered transgene integration platform (ETIP) that uses incomplete marker genes at the insertion site to enable rapid phenotypic screening and recovery of targeted events upon functional reconstitution of the marker genes. The two marker genes, encoding neomycin phosphotransferase II (nptII) and Discosoma sp. red fluorescent protein (DsRed) enable event selection on kanamycin-containing selective medium and subsequent screening for red fluorescent clones. The ETIP design allows targeted integration of donor DNA molecules either by homology-directed repair (HDR) or non-homologous end joining (NHEJ)-mediated mechanisms. Targeted donor DNA integration is facilitated by zinc finger nucleases (ZFN). The ETIP cassette was introduced into Nicotiana tabacum BY-2 suspension cells to generate target cell lines containing a single copy locus of the transgene construct. The utility of the ETIP platform has been demonstrated by targeting DNA constructs containing up to 25-kb payload. The success rate for clean targeted DNA integration was up to 21% for HDR and up to 41% for NHEJ based on the total number of calli analyzed by next-generation sequencing (NGS). The rapid generation of targeted events with large DNA constructs expands the utility of the nuclease-mediated gene addition platform both for academia and the commercial sector.

18.
PLoS Biol ; 17(6): e3000060, 2019 06.
Artículo en Inglés | MEDLINE | ID: mdl-31233488

RESUMEN

Apicomplexan parasites invade host cells in an active process involving their ability to move by gliding motility. While the acto-myosin system of the parasite plays a crucial role in the formation and release of attachment sites during this process, there are still open questions regarding the involvement of other mechanisms in parasite motility. In many eukaryotes, a secretory-endocytic cycle leads to the recycling of receptors (integrins), necessary to form attachment sites, regulation of surface area during motility, and generation of retrograde membrane flow. Here, we demonstrate that endocytosis operates during gliding motility in Toxoplasma gondii and appears to be crucial for the establishment of retrograde membrane flow, because inhibition of endocytosis blocks retrograde flow and motility. We demonstrate that extracellular parasites can efficiently incorporate exogenous material, such as labelled phospholipids, nanogold particles (NGPs), antibodies, and Concanavalin A (ConA). Using labelled phospholipids, we observed that the endocytic and secretory pathways of the parasite converge, and endocytosed lipids are subsequently secreted, demonstrating the operation of an endocytic-secretory cycle. Together our data consolidate previous findings, and we propose an additional model, working in parallel to the acto-myosin motor, that reconciles parasite motility with observations in other eukaryotes: an apicomplexan fountain-flow-model for parasite motility.


Asunto(s)
Movimiento Celular/fisiología , Endocitosis/fisiología , Toxoplasma/metabolismo , Actinas/metabolismo , Animales , Adhesión Celular/fisiología , Extensiones de la Superficie Celular/fisiología , Proteínas de la Membrana/metabolismo , Miosinas/metabolismo , Parásitos , Proteínas Protozoarias/metabolismo , Vías Secretoras/fisiología , Toxoplasma/fisiología
19.
Unfallchirurg ; 122(6): 452-463, 2019 Jun.
Artículo en Alemán | MEDLINE | ID: mdl-31165213

RESUMEN

Surgical providers must maintain currency and competency for low-volume high-risk procedures for optimal outcomes. There are currently a number of methods available to train for these rare but vital skills, ranging from simple to complex and inexpensive to expensive. Traditionally, these skills have been taught using human cadaveric and animal models, which are limited by availability (cadavers) and social acceptability (animals). As such, there is a need to utilize advances in educational and simulation technologies to refine and develop consensus-based, validated, tissue-realistic, anatomically correct and cost-effective training tools to teach these vital skills. Partially perfused human cadavers have recently been shown to be an important adjunct to established trauma training. Human patient simulators (HPS) and the associated technology is rapidly expanding, but currently lack consistent realism to be used for competence training, when compared to traditional models and are currently cost-prohibitive. It will be important for surgical trainers and trainees to remain engaged and facilitate the development of realistic cost-effective training tools.


Asunto(s)
Necesidades y Demandas de Servicios de Salud , Simulación de Paciente , Procedimientos Quirúrgicos Operativos/educación , Animales , Competencia Clínica , Simulación por Computador , Urgencias Médicas , Humanos , Procedimientos Quirúrgicos Operativos/normas , Encuestas y Cuestionarios
20.
J Pediatr ; 207: 154-160, 2019 04.
Artículo en Inglés | MEDLINE | ID: mdl-30772016

RESUMEN

OBJECTIVE: To assess changes in attitudes of neonatologists regarding the care of extremely preterm infants and parental involvement over the last 20 years. STUDY DESIGN: Internet-based survey (2016) involving 170 tertiary neonatal intensive care units in Austria, Switzerland, and Germany using the European Project on Parents' Information and Ethical Decision Making in Neonatal Intensive Care Units questionnaire (German edition) with minor modifications to the original survey from 1996 to 1997. RESULTS: The 2016 survey included 104 respondents (52.5% response rate). In 2016, significantly more neonatologists reported having ever withheld intensive care treatment (99% vs 69%) and withdrawn mechanical ventilation (96% vs 61%) or life-saving drugs (99% vs 79%), compared with neonatologists surveyed in 1996-1997. Fewer considered limiting intensive care as a slippery slope possibly leading to abuse (18% vs 48%). In the situation of a deteriorating clinical condition despite all treatment, significantly more neonatologists would ask parental opinion about continuation of intensive care (49% vs 18%). In 2016, 21% of German neonatologists would resuscitate a hypothetical infant at the limits of viability, even against parental wishes. CONCLUSIONS: Withholding or withdrawing intensive care for extremely preterm infants at the limits of viability with parental involvement has become more acceptable than it was 20 years ago. However, resuscitating extremely preterm infants against parental wishes remains an option for up to one-fifth of the responding neonatologists in this survey.


Asunto(s)
Actitud del Personal de Salud , Toma de Decisiones , Recien Nacido Extremadamente Prematuro , Cuidado Intensivo Neonatal/métodos , Neonatólogos/psicología , Autoinforme , Cuidado Terminal/estadística & datos numéricos , Austria , Femenino , Estudios de Seguimiento , Predicción , Alemania , Humanos , Recién Nacido , Masculino , Padres/psicología , Pautas de la Práctica en Medicina , Estudios Retrospectivos , Encuestas y Cuestionarios , Suiza , Privación de Tratamiento
SELECCIÓN DE REFERENCIAS
DETALLE DE LA BÚSQUEDA
...