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Optogenetic control of cAMP oscillations reveals frequency-selective transcription factor dynamics in Dictyostelium.
Development
January 2025
Department of Biology, Faculty of Science, Toho University, 2-2-1 Miyama, Funabashi, Chiba, 274-8510, Japan.
Oscillatory dynamics and their modulation are crucial for cellular decision-making; however, analysing these dynamics remains challenging. Here, we present a tool that combines the light-activated adenylate cyclase mPAC with the cAMP biosensor Pink Flamindo, enabling precise manipulation and real-time monitoring of cAMP oscillation frequencies in Dictyostelium. High-frequency modulation of cAMP oscillations induced cell aggregation and multicellular formation, even at low cell densities, such as a few dozen cells.
View Article and Find Full Text PDFIncreased Levels of hsa-miR-199a-3p and hsa-miR-382-5p in Maternal and Neonatal Blood Plasma in the Case of Placenta Accreta Spectrum.
Int J Mol Sci
December 2024
National Medical Research Center for Obstetrics, Gynecology and Perinatology Named After Academician Kulakov V.I., 117997 Moscow, Russia.
Despite the increasing number of placenta accreta spectrum (PAS) cases in recent years, its impact on neonatal outcomes and respiratory morbidity, as well as the underlying pathogenetic mechanism, has not yet been extensively studied. Moreover, no study has yet demonstrated the effectiveness of antenatal corticosteroid therapy (CT) for the prevention of respiratory distress syndrome (RDS) in newborns of mothers with PAS at the molecular level. In this regard, microRNA (miRNA) profiling by small RNA deep sequencing and quantitative real-time PCR was performed on 160 blood plasma samples from preterm infants (gestational age: 33-36 weeks) and their mothers who had been diagnosed with or without PAS depending on the timing of the antenatal RDS prophylaxis.
View Article and Find Full Text PDF[Effects of high-frequency volume-guaranteed ventilation in preterm newborns with respiratory distress syndrome: exploratory review].
Andes Pediatr
August 2024
Facultad de Salud, Universidad Santiago de Cali, Cali, Colombia.
Unlabelled: High-frequency oscillatory ventilation with volume guarantee (HFOV-VG) is a ventilatory mode that controls small tidal volumes at supraphysiological frequencies, potentially beneficial for preterm infants with respiratory distress syndrome (RDS).
Objective: To identify the physiological and clinical effects of HFOV-VG in preterm newborns with RDS, compared with conventional HFOV.
Method: Exploratory review of studies published between 2019 and 2023 of preterm newborns from 23 to 36 weeks of gestation with RDS, weighing ≥ 450g, with invasive HFOV support, using PRISMA flow diagram.
A fast parameter estimation method for high-frequency oscillation based on empirical wavelet transform and moving least square.
Sci Rep
January 2025
School of Electrical Engineering, Southeast University, Nanjing, 210096, China.
In renewable power systems, the interaction between generators, power electronic devices, and the grid has led to frequent high-frequency oscillation (HFO) events. These events can result in significant generation losses and pose serious threats to system stability. Therefore, the rapid and accurate HFO parameter estimation is crucial for early warning and effective mitigation of HFO.
View Article and Find Full Text PDFGas transport mechanisms during high-frequency ventilation.
Respir Res
December 2024
Department of Mechanical and Product Design Engineering, Swinburne University of Technology, Hawthorn, VIC, Australia.
By virtue of applying small tidal volumes, high-frequency ventilation is advocated as a method of minimizing ventilator-induced lung injury. Lung protective benefits are established in infants, but not in other patient cohorts. Efforts to improve and extend the lung protection potential should consider how fundamental modes of gas transport can be exploited to minimize harmful tidal volumes while maintaining or improving ventilation.
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