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Vivre en ville nuit à la qualité de notre peau.

10/07/2018

Une étude coréenne montre que la pollution atmosphérique est néfaste pour la flore cutanée. Depuis quelques années, les études sur la flore intestinale (ou microbiote intestinal) se multiplient. Côlon irritable, maladie de Crohn, 

Modern, germ-free lifestyles could be responsible for most common type of child cancer

22/05/2018

The modern, germ-free lifestyles many children lead could be responsible for the most common type of cancer in children - acute lymphoblastic leukaemia - according to one of the UK’s most well-respected scientists. Professor Mel Greaves, from the Institute of Cancer Research, has been studying for 30 years how the immune system can become cancerous if it is not exposed to enough bugs early in life. Acute lymphoblastic leukaemia affects one in 2,000 children and is more common in advanced, affluent societies, suggesting cleaner modern lifestyles could play a defining role. Prof Greaves says the disease happens in three stages: a genetic mutation inside the womb, a lack of exposure to microbes in early life and an immune malfunction and leukaemia in childhood. He believes that it could be possible to prevent the condition. Prof Greaves said: "The research strongly suggests that acute lymphoblastic leukaemia has a clear biological cause and is triggered by a variety of infections in predisposed children whose immune systems have not been properly primed." Unfortunately, preventing the disease isn’t as simple as exposing children to dirt. They need, according to Prof Greaves, contact with beneficial bacteria. The best way to do this is to give them a safe cocktail of bacteria, such as in a yoghurt drink, that will help boost their immune system. [Related reading: Thumb-suckers and nail-biters less prone to allergies – study]

The newest weapon against cancer: Immunotherapy

16/06/2016

Our immune systems are able to fight bacteria, viruses and microbes. Therefore, you'd like to think that they could play a vital role in the fight against cancer too. Over the past 30 years, immunotherapy has emerged and grown as a therapeutic strategy in the field of oncology. This new class of cancer treatment harnesses the power of the immune system and its unique properties to fight cancer in a way that is more powerful than many that have come before it. Immunotherapy is also an exciting weapon for fighting cancer because of the potential long-term protection it gives against the disease; the fact that it causes fewer side effects than other traditional therapies; and can benefit more patients with different types of cancer. With this in mind, a team in Toulouse is looking to build upon the already fantastic base that immunotherapy has to make it an even more potent cancer therapy. They are looking to discover which patients respond to the treatment best, and Dr. Michel Attal, managing director of the Cancer Research Centre of Toulouse, said: "This is just the beginning. In the coming years, all cancer patients will, at one time or another, be treated with immunotherapy."

Benefits of Fish Oil Highlighted in New Study

04/09/2015

New research suggests that the impact of dietary fats on our overall health is likely to be affected by the changes they cause in the stomach’s bacteria ecosystem. The findings, which were obtained by studies in mice, show that diets rich in omega-3 fats, such as fish oil, affect the gut’s balance of bacteria differently to diets rich in lard. Senior researcher Professor Fredrik Bäckhed, from the University of Gothenburg’s faculty of Health Sciences, also known as the Sahlgrenska Academy, led the team of European researchers who discovered that changes in gut microbiota are responsible for some of their health benefits. “We wanted to determine whether gut microbes directly contribute to the metabolic differences associated with diets rich in healthy and unhealthy fats,” said first study author Robert Caesar from the University of Gothenburg. And, even though the study was done in mice, he said: “our goal is to identify interventions for optimising metabolic health in humans.” Writing in the journal Cell Metabolism, Bäckhed’s team said they obtained their results by feeding either lard or fish oil to a group of mice for a period of 11 weeks. They then monitored the metabolic health of the study mice and found that dietary fat is a major community structure driver, which in turn affects the composition and diversity of gut microbiota. “We were surprised that the lard and the fish oil diet, despite having the same energy content and the same amount of dietary fibre—which is the primary energy source for the gut bacteria—resulted in fundamentally different gut microbiota communities and that the microbiota per se had such large effects on health,” said Bäckhed. Increased lard consumption promoted the growth of Bilophila, bacteria often linked to gut inflammation. In contrast, the fish oil diet increased the growth of Akkermansia muciniphila, bacteria known to reduce weight gain and improve glucose metabolism in mice. The bottom line is that eating a diet rich in fish oils is, as the study suggests, going to help you lose weight, compared to a diet rich in lard.    

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