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Cross part of mouse muscle (in blue: labeling of nuclei; in inexperienced: labeling of muscle fiber membranes). Regular male mice show bigger muscle fibers than these seen in mutant, syncytin knock-out mice. Credit score: François Redelsperger It was already recognized that genes inherited from historic retroviruses[1] are important to the placenta in mammals, a discovering to which scientists within the  Laboratoire Physiologie et Pathologie Moléculaires des Rétrovirus Endogènes et Infectieux (CNRS/Université Paris-Sud) contributed. In the present day, the identical scientists[2] have revealed a brand new chapter on this astonishing story: these genes of viral origin can also be accountable for the extra developed muscle mass seen in males! Their findings are printed on 2 September 2016 in  PLOS Genetics . Retroviruses carry proteins on their floor which can be capable of mediate fusion of their envelope...

Many of the major new outbreaks of disease, particularly in Africa, are so-called zoonotic infections, diseases that are transmitted to humans from animals. The Ebola virus, for example, which recently killed over 11,000 people across Africa, was most likely transmitted to humans from fruit bats. Modelling how outbreaks arise and whether they will take hold or quickly die out has proved challenging, with two factors in particular being difficult to quantify. The first is 'spillover', where the pathogen -- a virus or parasite, for example -- passes from an animal to a person. This can be through direct transmission, for example by being bitten or by eating 'bush meat' (wild animals such as fruit bats or monkeys that are caught and consumed), or indirectly, such as through contact with faeces or disease-carrying mosquitoes. In many cases, a spillover will go no further. When a human is bitten by a rabid dog, they may become infected, but as the disease cannot transm...

The implications of this finding are that new complementary therapies could be developed that target these bacteria to boost the efficiency of ART and prevent the complications associated with immune deficiency and chronic inflammation. "HIV patients suffer from persistent immune deficiencies and chronic intestinal inflammation caused, in part, by the very toxins released by the cells to fight off the HIV infection. In this study we have found that, in some patients, certain gut bacteria become activated during ART and begin to amass anti-inflammatory molecules," explains CSIC researcher Manuel Ferrer of the Catalysis Institute. The immune recovery of these "ART responders" is much better than that of their peers, the make-up and behaviour of whose gut bacteria does not lead to the same anti-inflammatory effect. In the study, the researchers analysed the gut bacteria found in the faecal matter of healthy subjects and HIV patients undergoing different intensiti...