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Concept

Péristaltisme

Publications associées (10)

Microfluidic devices for automated analysis of ingested bacteria in the Caenorhabditis elegans intestine

Farzad Rezaeianaran

In this thesis, we explored on-chip high-resolution imaging of the fate of intestinal bacteria and bacterial products in Caenorhabditis elegans (C. elegans). In the first part, we carried out high-resolution z-stack fluorescent imaging of Red Fluorescent P ...

EPFL2023

An In Vivo Microfluidic Study of Bacterial Load Dynamics and Absorption in the C. elegans Intestine

Martinus Adela Maria Gijs, Thomas Lehnert, Vittorio Viri

Caenorhabditiselegans (C. elegans) has gained importance as a model for studying host-microbiota interactions and bacterial infections related to human pathogens. Assessing the fate of ingested bacteria in the worm's intestine is therefore of great interes ...

MDPI2021

Geometric Mixing, Peristalsis, and the Geometric Phase of the Stomach

Nicolas Piro Mastracchio

Mixing fluid in a container at low Reynolds number-in an inertialess environment-is not a trivial task. Reciprocating motions merely lead to cycles of mixing and unmixing, so continuous rotation, as used in many technological applications, would appear to ...

Public Library Science2015

The Receptor TGR5 Mediates the Prokinetic Actions of Intestinal Bile Acids and Is Required for Normal Defecation in Mice

Kristina Schoonjans

BACKGROUND & AIMS: Abnormal delivery of bile acids (BAs) to the colon as a result of disease or therapy causes constipation or diarrhea by unknown mechanisms. The G protein-coupled BA receptor TGR5 (or GPBAR1) is expressed by enteric neurons and endocrine ...

W B Saunders Co-Elsevier Inc2013

Serotonin receptor diversity in the human colon: Expression of serotonin type 3 receptor subunits 5-HT3C, 5-HT3D, and 5-HT3E

Rudolf Hovius

Since the first description of 5-HT3 receptors more than 50 years ago, there has been speculation about the molecular basis of their receptor heterogeneity. We have cloned the genes encoding novel 5-HT3 subunits 5-HT3C, 5-HT3D, and 5-HT3E and have shown th ...

Wiley-Blackwell2010

A tissue-engineered model of the intestinal lacteal for evaluating lipid transport by lymphatics

Melody Swartz, Sandeep Raghunathan

Lacteals are the entry point of all dietary lipids into the circulation, yet little is known about the active regulation of lipid uptake by these lymphatic vessels, and there lacks in vitro models to study the lacteal-enterocyte interface. We describe an i ...

Wiley-Blackwell2009

Intercellular calcium dynamics in smooth muscle cells : propagation of arterial vasomotion and influence of the endothelium

Dominique Seppey

Muscular arteries are able to actively modify their diameter by modulating the tone of the smooth muscle cells located within the arterial wall. A small variation of lumen diameter has a large influence on blood flow as well as on arterial pressure. The ca ...

EPFL2009

Calcium dynamics and vasomotion in arteries subject to isometric, isobaric, and isotonic conditions

Jean-Jacques Meister, Jean-Louis Bény, Michèle Koenigsberger, Dominique Seppey

In vitro, different techniques are used to study the smooth muscle cells' calcium dynamics and contraction/relaxation mechanisms on arteries. Most experimental studies use either an isometric or an isobaric setup. However, in vivo, a blood vessel is neithe ...

2008

A theoretical model of the cellular calcium dynamics and vasomotion in muscular arteries

Michèle Koenigsberger

Muscular arteries possess the ability to control actively their lumen by altering the tone of the smooth muscle cells of the arterial wall, a property which is vital for a large number of the hemodynamical functions of the body. Arterial contraction is due ...

EPFL2006

Electrical and mechanical activity of the intestine : experimental assessment and biophysical modeling

Mattia Bertschi

The intestine is today still an organ whose mechanisms of functions are not fully understood. The diffculty in its understanding comes from the fact that it is regulated by a complex network of signals of different natures. Granting that a multitude of exp ...

EPFL2005