Pela primeira vez, pesquisadores detectam o crescimento de células saudáveis que revestem as vias aéreas em ex-fumantes. Comparado aos tabagistas, o número dessas estruturas protetoras é 40% maior
Scientists have identified an enigmatic virus whose genome seems to be almost entirely new to science, populated by unfamiliar genes that have never before been documented in viral research.
La actividad física se relaciona con cambios en la estructura del ADN sin modificar la secuencia de letras de los genes, su estructura primaria, de forma que impacta en cómo se expresa la información genética, según demuestra un estudio liderado por investigadores del Instituto Hospital del Mar de Investigaciones Médicas (IMIM).
El estudio, publicado en la revista ‘Medicine and Science in Sports and Exercise’, destaca que realizar actividad de forma moderada-vigorosa, es decir, caminar a diario de forma rápida o practicar algún deporte durante, al menos 30 minutos, permite maximizar beneficios para la salud.
Cornell University engineers have created an artificial material that has three key traits of life — metabolism, self-assembly and organization. The engineers were able to pull off such a feat by using DNA in order to make machines from biomaterials that would have characteristics of alive things.
In a landmark study, scientists have reconstructed the genome of an ancient human who lived some 5,700 years ago in what we now know as southern Denmark.
No known physical remains of the woman in question exist. All we have to go on, in fact, is just a small lump of birch pitch – an ancient tar-like substance distilled from heated tree bark. Amazingly, this sticky blob was enough to not only tell us that the woman once walked the Earth, but also hint at numerous clues about her identity.
The reason for that is because birch pitch was sometimes chewed by ancient humans, in addition to being used as an adhesive on stone tools and weapons as far back as the Middle Pleistocene (which ended roughly 126,000 years ago).
New research makes a molecular connection between the brain and aging—and shows that overactive neurons can shorten life span.
To figure out how the body changes over time, researchers are increasingly looking to understand epigenetics, the study of changes in organisms caused by modification of gene expression rather than alteration of the genetic code itself. This scientific endeavor extends to teeth as well.
Last year, a Chinese scientist earned global condemnation for genetically editing two infant girls. Now a Russian molecular biologist named Denis Rebrikov wants to try it again.
Mitochondria are most famous as sources of metabolic energy. But by splitting and combining, they can also release chemical signals to regulate cell activities, including the generation of neurons.