Mécanismes physiopathologiques impliqués dans la dysfonction d'organes au cours du sepsis [Pathophysiological mechanisms of organ dysfunction in sepsis].

Sepsis is defined as the systemic inflammatory response to an infection. The occurrence of organ dysfunction increases the severity of sepsis. Complex interactions between multiple immunomodulating mediators and various cell populations, activated secondarily to the initial infectious insult, promote the development of organ dysfunction in sepsis. Although septic organ dysfunction has long been considered as the end result of chaotic, uncontrolled and deregulated inflammatory cascades, it might instead represent an adaptive response to avoid the occurrence of irreversible tissue damage and end-organ injury. In this article, we review the major mechanisms involved in organ dysfunction during sepsis, and also present the concept of organ dysfunction as an adaptive response to the septic process.

Bienheureux l'homme qui se plaît dans la loi de Yahvé. Psaume 1

(Résumé de l'ouvrage) Une superbe fresque des quêtes spirituelles de l'humanité. Qui sont ces maîtres de vie, ces sages, ces mystiques qui ont façonné l'aventure spirituelle de l'humanité ? Quels sont les grands textes qu'ils ont écrits ou suscités, quelles sont les sources de leur inspiration ? Pour la première fois en un seul volume les trésors de sagesses de l'histoire de l'humanité : 100 figures spirituelles (Du Bouddha à Thérèse d'Avila, de Sénèque à Gandhi, d'Ibn 'Arabi à Simone Weil, des sages égyptiens aux lamas tibétains contemporains, des maîtres du hassidisme aux gurus de l'Inde moderne...), 200 textes de sagesse du monde entier, 100 illustrations.

Rôle de l'inactivité physique dans l'étiologie de l'obésité [The role of physical inactivity in the etiology of obesity].

The activity-related energy expenditure mainly depends upon body weight, the type, intensity and duration of the exercise as well as the mechanical efficiency with which the subjects perform the work. Controversy still exist about the role of hypoactivity in the aetiology of obesity both in adolescence and adulthood. A number of experimental studies based on indirect assessment of physical activity (such as pedometers, accelerometers, cinematography and heart rate) have demonstrated a significant reduction in spontaneous physical activity in certain obese groups as compared to lean matched controls. On the other hand, direct measurements of energy expenditure (by indirect calorimetry) have shown a linear relationship between body weight and 24-hour (or activity-related) energy expenditure. It therefore appears that despite the greater placidity characterising some grossly obese subjects, the absolute rate of energy expenditure - particularly in weight bearing activities - is not lower than in lean subjects, since the hypoactivity does not fully compensate for the greater gross energy cost of a given activity.