Category Archives: Circulation, metabolism, nutrition

The appendix is not an unnecessary organ but is in fact correlated with a longer lifespan

koala

Long considered an unnecessary organ, the appendix is now the focus of several studies that aim to better understand its role. Present in many mammals, including humans, it appears to have developed at least 16 times over the course of the evolutionary history of mammals, suggesting that its function must confer a positive selective advantage on those that have it.

Hippurate, a metabolite derived from gut bacteria, is associated with microbiotal diversity

Good gut microbiota function has an impact on our general physical and psychological health. Understanding how the architecture of the microbiota and the function of the bacteria that inhabit it affect the body has become a key research focus in recent years.

Vaccins anti Covid-19 et thrombose : de quoi parle-t-on ?

Vaccination

Suite aux cas de thromboses survenus après la vaccination contre la Covid-19, l’équipe du Pr David Smadja, professeur d’hématologie d’Université de Paris, membre du service d’hématologie de l’hôpital européen Georges-Pompidou AP-HP et directeur d’une équipe de l’unité Inserm 1140 (Université de Paris) a analysé, à la demande du Centre de Pharmacovigilance de l’OMS, près de 2 000 cas signalés dans le monde.

Persistence of rituximab-resistant memory B cells contributes to relapses in adult patients with immunologic thrombocytopenia

lymphocytes B

Teams of researchers studied the presence of self-reactive memory B lymphocytes before and after treatment with rituximab in adult patients with thrombocytopenia immunologic disease (ITP), a rare autoimmune disease. The results of this study show that a fraction of memory B lymphocytes self-reactive towards platelet antigenesist treatment with rituximab, persist in the spleen for several months and participates in relapses. The discovery of these cells could open up new therapeutic avenues.

Traitement préventif précoce par Inhibiteur de l’Enzyme de Conversion de l’Angiotensine, dans la Myopathie de Duchenne

myopathie de Duchenne

Des équipes des hôpitaux Cochin, Hôtel-Dieu et Necker-Enfants malades de l’AP-HP, d’Université de Paris et de l’Inserm, en collaboration avec le Centre de Référence des maladies neuromusculaires Nord/Est/Ile-de-France avec le soutien de l’association monégasque contre les myopathies, ont mené des travaux sur l’impact d’un traitement préventif précoce par Inhibiteur de l’Enzyme de Conversion (IEC) de l’Angiotensine, dans la Myopathie de Duchenne.

A Toxin Causing DNA Damage Found in Patients with Urinary Tract Infections

Urinary tract infections affect over 50% of women, in some cases recurrently. E. coli bacteria are very often implicated in their development.

Discovery of a Mechanism Explaining the Beneficial Action of Cancer Drug Tamoxifen on the Cardiovascular System

A commonly used treatment in some forms of breast cancer, tamoxifen acts on the cancer cells by blocking the estrogen receptor (ER)a and thereby inhibiting their proliferation. However, the action of this drug appears to be more complex than that, with the addition of protective effects on the arteries that could reduce the risk of developing cardiovascular disease.

A Disruption of the Microbiota Is Linked to the Formation of a Molecule Promoting Type 2 Diabetes

An imbalanced diet has been linked to a disruption of the gut microbiota, which promotes metabolic diseases such as diabetes. Researchers have shown, in a large European cohort, that changes in the composition of the gut microbiota lead to increased blood levels of the molecule imidazole propionate. A molecule known to render the body’s cells resistant to insulin, thereby increasing the risk of developing type 2 diabetes.

Links between nutrition and the brain: how a maternal omega-3 deficiency can influence the behavioural development of offspring in animals

Omega-3 fatty acids are essential, necessarily supplied by the diet and indispensable to brain development. Scientists have focused in particular on the impact of the maternal diet during gestation and lactation on the brain development of their offspring. They have thus shown for the first time in mice how an insufficient intake of omega-3 in the mother can alter the development of neuronal networks in the offspring, causing memory deficits. They have also deciphered the molecular mechanisms underpinning these effects.

Rôle possible de l’exposition aux perturbateurs endocriniens dans la sévérité de la Covid-19

Une nouvelle étude révèle que l’exposition à des produits chimiques qui dérèglent le système endocrinien (les perturbateurs endocriniens ou PE) pourrait interférer avec différents signaux biologiques du corps humain jouant un rôle important dans la sévérité de la Covid-19.

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