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Les individus de peau foncée aux cheveux blonds naturels – En génétique, tout est possible

8 août 2019 – Les cheveux blonds sont un phénotype humain plutôt rare, présent presque exclusivement en Europe et en Océanie. La pigmentation humaine varie considérablement au sein des populations et entre les populations et dépend de l’exposition aux rayons ultraviolets (UV) ainsi que du type et de la quantité de mélanine produit dans les mélanocytes et les kératinocytes.

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  • Genes, the social environment, and adolescent smoking septembre 17, 2019
    Adolescence is a time of dramatic change. It marks a period of significant physical transformation—such as the drive toward sexual maturity. But it can also be a time of considerable psychological change and social experimentation.
  • Cause of rare, fatal disorder in young children pinpointed septembre 17, 2019
    Scientists at Washington University School of Medicine in St. Louis appear to have solved a decades-long mystery regarding the precise biochemical pathway leading to a fatal genetic disorder in children that results in seizures, developmental regression and death, usually around age 3. Studying a mouse model with the same human illness—called Krabbe disease—the researchers also […]
  • Gene-targeted cancer drugs, slow release overcome resistance septembre 16, 2019
    Biomedical engineers at Duke University have developed a method to address failures in a promising anti-cancer drug, bringing together tools from genome engineering, protein engineering and biomaterials science to improve the efficacy, accuracy and longevity of certain cancer therapies.
  • Genetic mutation appears to protect some people from deadly MRSA septembre 16, 2019
    An inherited genetic tendency appears to increase the likelihood that a person can successfully fight off antibiotic-resistant staph infections, according to a study led by Duke Health researchers.
  • Renegade genes caught red handed septembre 16, 2019
    The guardians of the human genome that work to prevent potentially disease-causing gene expression might not be as effective at their jobs as previously thought, according to new University of Arizona research.
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