Oxygen Consumption, Effort, and Weaning in the Mechanically Ventilated Patient in the Intensive Care Unit: The Extubate Study: A Protocol for an Observational Study.

Purpose: The spontaneous breathing trial (SBT) is often performed to determine whether the patient can be extubated with a minimal risk of failure. The rapid shallow breathing index (RSBI) is an important parameter used in an SBT. However, weaning failure rates are between 15-20%.

Mechanical Power Is Associated With Mortality in Pressure-Controlled Ventilated Patients: A Dutch, Single-Center Cohort Study.

Importance: Mechanical power (MP) could serve as a valuable parameter in clinical practice to estimate the likelihood of adverse outcomes. However, the safety thresholds for MP in mechanical ventilation remain underexplored and contentious.

Objectives: This study aims to investigate the association between MP and hospital mortality across varying degrees of lung disease severity, classified by Pao2/Fio2 ratios.

Impaired 11β-hydroxysteroid dehydrogenase type 2 activity in kidney disease disrupts 11-oxygenated androgen biosynthesis.

Context: 11-oxygenated androgens are a group of adrenal-derived steroids that require peripheral activation. In vitro data highlight a putative role for 11β-hydroxysteroid dehydrogenase type 2 (HSD11B2) in 11-oxygenated androgen biosynthesis, converting 11β-hydroxyandrostenedione (11OHA4) to 11-ketoandrostenedione (11KA4), the direct precursor of the potent androgen 11-ketotestosterone (11KT). As the kidney is the major site of HSD11B2 expression, we hypothesized that patients with chronic kidney disease (CKD) would have reduced 11-oxygenated androgen biosynthesis due to impaired HSD11B2 activity.

The archaeal family 3 polyphosphate kinase reveals a function of polyphosphate as energy buffer under low energy charge.

Inorganic polyphosphate, a linear polymer of orthophosphate residues linked by phosphoanhydride bonds, occurs in all three domains of life and plays a diverse and prominent role in metabolism and cellular regulation. While the polyphosphate metabolism and its physiological significance have been well studied in bacteria and eukaryotes including human, there are only few studies in archaea available so far. In Crenarchaeota including members of , the presence of polyphosphate and degradation via exopolyphosphatase has been reported and there is some evidence for a functional role in metal ion chelation, biofilm formation, adhesion and motility, however, the nature of the crenarchaeal polyphosphate kinase is still unknown.