A hyaluronic acid capsule is a major virulence factor in the pathogenesis of Streptococcus pyogenes. It acts as an anti-phagocytic agent and adhesin to keratinocytes. The expression of the capsule is primarily regulated at the transcriptional level by the two-component regulatory system CovRS, in which CovR acts as a transcriptional repressor. The covRS genes are frequently mutated in many inva...

Capsule polysaccharide is a major virulence factor for a wide range of bacterial pathogens, including Streptococcus pneumoniae. The biosynthesis of Wzy-dependent capsules in both gram-negative and -positive bacteria is regulated by a system involving a protein tyrosine phosphatase (PTP) and a protein tyrosine kinase. However, how the system functions is still controversial. In Streptococcus pne...

Magnetic manipulation of capsule endoscopes has the potential to make current gastrointestinal screening procedures faster, safer, and less invasive. To date, two electromagnetic systems have been developed with the ability to perform five-degree-of-freedom (5-DOF) manipulation of an untethered magnetic device such as a magnetic capsule endoscope: the OctoMag system consists of eight electromag...

BACKGROUND In France, methadone has historically been less accessible than buprenorphine. In 2008, a dry formulation (capsule) was introduced into the market, aimed in particular to improve methadone accessibility. OBJECTIVE To describe the impact (prevalence of use, patient profiles and compliance with requirements) of the dry methadone formulation in France. METHOD A retrospective cohort ...

The objective of the present study was to develop and evaluate a pulsatile system of theophylline based on chronopharmaceutical considerations. The basic design consists of an impermeable capsule body, which contains the drug and is closed by an erodible tablet plug. The body portion of the hard gelatin capsules was cross-linked by the combined effect of formaldehyde and heat treatment. The for...

The gastrointestinal tract is home of some of the most deadly human diseases. The main problems are related to the difficulty of accessing it for diagnosis or intervention and concomitant patient discomfort. The flexible endoscopy technique has established itself in medical practice due to its high diagnostic accuracy and reliability; however, several technical limitations still remain and the ...

A capsule is a group of neurons whose activity vector represents the instantiation parameters of a specific type of entity such as an object or an object part. We use the length of the activity vector to represent the probability that the entity exists and its orientation to represent the instantiation parameters. Active capsules at one level make predictions, via transformation matrices, for t...