23 research outputs found

    Methods of induction of labor in women with obesity : A secondary analysis of two multicenter randomized controlled trials

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    No funding was received for the original PROBAAT-I trial or this follow-up study. The original PROBAAT-II trial was funded by Fonds NutsOhra. MV received a doctoral grant for teachers from the Netherlands Organization for Scientific Research (023.011.051). BM is supported by a NHMRC Practitioner Fellowship (GNT1082548).Peer reviewe

    Synaptic Transmission from Horizontal Cells to Cones Is Impaired by Loss of Connexin Hemichannels

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    In the vertebrate retina, horizontal cells generate the inhibitory surround of bipolar cells, an essential step in contrast enhancement. For the last decades, the mechanism involved in this inhibitory synaptic pathway has been a major controversy in retinal research. One hypothesis suggests that connexin hemichannels mediate this negative feedback signal; another suggests that feedback is mediated by protons. Mutant zebrafish were generated that lack connexin 55.5 hemichannels in horizontal cells. Whole cell voltage clamp recordings were made from isolated horizontal cells and cones in flat mount retinas. Light-induced feedback from horizontal cells to cones was reduced in mutants. A reduction of feedback was also found when horizontal cells were pharmacologically hyperpolarized but was absent when they were pharmacologically depolarized. Hemichannel currents in isolated horizontal cells showed a similar behavior. The hyperpolarization-induced hemichannel current was strongly reduced in the mutants while the depolarization-induced hemichannel current was not. Intracellular recordings were made from horizontal cells. Consistent with impaired feedback in the mutant, spectral opponent responses in horizontal cells were diminished in these animals. A behavioral assay revealed a lower contrast-sensitivity, illustrating the role of the horizontal cell to cone feedback pathway in contrast enhancement. Model simulations showed that the observed modifications of feedback can be accounted for by an ephaptic mechanism. A model for feedback, in which the number of connexin hemichannels is reduced to about 40%, fully predicts the specific asymmetric modification of feedback. To our knowledge, this is the first successful genetic interference in the feedback pathway from horizontal cells to cones. It provides direct evidence for an unconventional role of connexin hemichannels in the inhibitory synapse between horizontal cells and cones. This is an important step in resolving a long-standing debate about the unusual form of (ephaptic) synaptic transmission between horizontal cells and cones in the vertebrate retina

    Induction of Labor Using a Foley Catheter or Misoprostol : A Systematic Review and Meta-analysis

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    Importance: Induction of labor is a widely used obstetric intervention, occurring in one in four pregnancies. When the cervix is unfavorable, still many different induction methods are used. Objective: We compared Foley catheter alone to different misoprostol dosages and administration routes, and the combination of Foley catheter with misoprostol. Evidence acquisition: We reviewed the literature on the best induction method regarding their safety and effectiveness, using the outcome measures hyperstimulation, fetal distress, neonatal morbidity and mortality as well as cesarean delivery, vaginal instrumental delivery, and maternal morbidity. We searched Pubmed, Cochrane, and Web of Science from January 1, 1980 to February 12, 2016. Twenty-two randomized controlled trials (RCTs) were included, comparing Foley catheter with or without misoprostol to misoprostol alone (both vaginal and oral) for induction of labor (5,015 women). Results: Most included studies were underpowered to detect differences in safety outcomes, as the majority are powered for time to delivery or cesarean delivery. Meta-analysis of these studies does not allow assessment of the safety profile of Foley catheter compared to misoprostol (any dose, any administration route) with sufficient power. For the safety outcomes of the total group of Foley catheter versus misoprostol (any dose, any administration route) (17 studies, 4,234 women) we found that Foley catheter results in less hyperstimulation compared to misoprostol (2% versus 4%; risk ratio [RR], 0.54; 95% confidence interval [CI], 0.37-0.79) and fewer cesarean deliveries for nonreassuring fetal heart rate, 5% vs 7%; RR, 0.72; 95% CI, 0.55-0.95; while there were no statistically significant differences in neonatal outcomes. The total number of cesarean deliveries was 26% versus 22% (RR, 1.16; 95% CI, 1.00-1.34). There were fewer vaginal instrumental deliveries with a Foley catheter compared to misoprostol (10% vs 14%; RR, 0.74; 95% CI, 0.60-0.91). Foley catheter with misoprostol compared to misoprostol alone (any dose, any administration route) (7 studies, 1,073 women) resulted in less hyperstimulation than misoprostol alone (17% vs 23%; RR, 0.71; 95% CI, 0.52-0.97). Cesarean deliveries for nonreassuring fetal heart rate were comparable (7% vs 9%; RR, 0.79; 95% CI, 0.51-1.22). Neonatal outcomes were infrequently reported. The total number of cesarean deliveries was 34% versus 34% (RR, 1.01; 95% CI, 0.86-1.19). Conclusion: In women with an unripe cervix at term, Foley catheter seems to have a better safety profile than misoprostol (any dose, any administration route) for induction of labor. Larger studies are needed to investigate the safety profile of a Foley catheter compared to separate dosing and administration regimens of misoprostol

    Induction of Labor Using a Foley Catheter or Misoprostol : A Systematic Review and Meta-analysis

    No full text
    Importance: Induction of labor is a widely used obstetric intervention, occurring in one in four pregnancies. When the cervix is unfavorable, still many different induction methods are used. Objective: We compared Foley catheter alone to different misoprostol dosages and administration routes, and the combination of Foley catheter with misoprostol. Evidence acquisition: We reviewed the literature on the best induction method regarding their safety and effectiveness, using the outcome measures hyperstimulation, fetal distress, neonatal morbidity and mortality as well as cesarean delivery, vaginal instrumental delivery, and maternal morbidity. We searched Pubmed, Cochrane, and Web of Science from January 1, 1980 to February 12, 2016. Twenty-two randomized controlled trials (RCTs) were included, comparing Foley catheter with or without misoprostol to misoprostol alone (both vaginal and oral) for induction of labor (5,015 women). Results: Most included studies were underpowered to detect differences in safety outcomes, as the majority are powered for time to delivery or cesarean delivery. Meta-analysis of these studies does not allow assessment of the safety profile of Foley catheter compared to misoprostol (any dose, any administration route) with sufficient power. For the safety outcomes of the total group of Foley catheter versus misoprostol (any dose, any administration route) (17 studies, 4,234 women) we found that Foley catheter results in less hyperstimulation compared to misoprostol (2% versus 4%; risk ratio [RR], 0.54; 95% confidence interval [CI], 0.37-0.79) and fewer cesarean deliveries for nonreassuring fetal heart rate, 5% vs 7%; RR, 0.72; 95% CI, 0.55-0.95; while there were no statistically significant differences in neonatal outcomes. The total number of cesarean deliveries was 26% versus 22% (RR, 1.16; 95% CI, 1.00-1.34). There were fewer vaginal instrumental deliveries with a Foley catheter compared to misoprostol (10% vs 14%; RR, 0.74; 95% CI, 0.60-0.91). Foley catheter with misoprostol compared to misoprostol alone (any dose, any administration route) (7 studies, 1,073 women) resulted in less hyperstimulation than misoprostol alone (17% vs 23%; RR, 0.71; 95% CI, 0.52-0.97). Cesarean deliveries for nonreassuring fetal heart rate were comparable (7% vs 9%; RR, 0.79; 95% CI, 0.51-1.22). Neonatal outcomes were infrequently reported. The total number of cesarean deliveries was 34% versus 34% (RR, 1.01; 95% CI, 0.86-1.19). Conclusion: In women with an unripe cervix at term, Foley catheter seems to have a better safety profile than misoprostol (any dose, any administration route) for induction of labor. Larger studies are needed to investigate the safety profile of a Foley catheter compared to separate dosing and administration regimens of misoprostol

    Celiac disease patients dendritic cells have a different shape when interacting with the substrate compared to controls.

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    Dendritic cells from CD patients have a different shape compared to controls when interacting with fibronectin without any treatment.CD patients DC independently from the phase of the disease have a different shape when interacting with the substrate. Suggesting that genetic environment more than inflammatory state seems influence DC shape and actin cytoskeleton. Gliadin peptide P31-43 interferes with DC shape in healthy controls

    CELL SHAPE DISCRIMINATES BETWEEN NORMAL AND CELIAC DISEASE (CD) DENDRITIC CELLS (DC).

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    AIM: The interaction with fibronectin of dendritic cells (DC) from celiac disease (CD) patients and controls was investigated. In particular, the ability of these cells to interact with the substrate by analyzing their morphology and actin rearrangement when in contact with fibronectin, which is a physiological substrate for DC. Furthermore, we investigated the role of anti-tTg and anti-β1 integrin antibodies on the interaction of DC with fibronectin. DC from controls and from CD patients both in the active and remission phase of the disease were compared. MATERIALS AND METHODS: Immature DC were generated by extracting monocytes from peripheral blood and stimulating them with IL-4 and GM-CSF for 6 days. Cell shape and adhesion was determined by crystal violet staining. Confocal microscopy of phalloidin staining was used to highlight the actin cytoskeleton.RESULTS: We showed that cells of CD patients have a different shape when interacting with the substrate compared to controls cells, even without any treatment. This alteration is observed in patients in the active as well in the remission fase of the disease. Gliadin peptide P31-43 interferes with cells shape mainly in controls, inducing DC to make more dendrites. Gliadin peptide P56-68 has less effect on cell shape.Moreover we found that tTg antibodies can interfere with the shape of the cells, by making them round and small with almost no dendrite formation, both in CD patients and controls, without interfering with the possibility to adhere. This indicates a new biological role for these antibodies in the disease.Also anti-β1integrin antibodies interfere with the shape of the cells in the same way tTg antibodies does, suggesting a common mechanism for both antibodies. CONCLUSIONS: These results suggest that genetic background in CD patients seems to influence DC shape and actin cytoskeleton more than inflammatory state. Moreover the treatment of controls cells with gliadin peptides, mainly P31-43, are able to alter the shape of the cells by inducing them to generate more dendrites. Anti-tTg and Anti-β1 integrin antibodies can interfere with DC morphology both in CD patients and controls. The biological activity of these antibodies on DC may have a role in the CD pathogenesis

    Does the New FIGO 2018 Staging System Allow Better Prognostic Differentiation in Early Stage Cervical Cancer?: A Dutch Nationwide Cohort Study

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    The FIGO 2018 staging system was introduced to allow better prognostic differentiation in cervical cancer, causing considerable stage migration and affecting treatment options. We evaluated the accuracy of the FIGO 2018 staging in predicting recurrence free (RFS) and overall survival (OS) compared to FIGO 2009 staging in clinically early stage cervical cancer. We conducted a nationwide retrospective cohort study, including 2264 patients with preoperative FIGO (2009) IA1, IA2 and IB1 cervical cancer between 2007-2017. Kaplan-Meier analyses were used to assess survival outcomes. Logistic regression was used to assess risk factors for lymph node metastasis and parametrial invasion. Stage migration occurred in 48% (22% down-staged, 26% up-staged). Survival data of patients down-staged from IB to IA1/2 disease were comparable with FIGO 2009 IA1/2 and better than patients remaining stage IB1. LVSI, invasion depth and parametrial invasion were risk factors for lymph node metastases. LVSI, grade and age were associated with parametrial invasion. In conclusion, the FIGO 2018 staging system accurately reflects prognosis in early stage cervical cancer and is therefore more suitable than the FIGO 2009 staging. However subdivision in IA1 or IA2 based on presence or absence of LVSI instead of depth of invasion would have improved accuracy. For patients down-staged to IA1/2, less radical surgery seems appropriate, although LVSI and histology should be considered when determining the treatment plan
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