genetics

Why does lack of sleep increase the appetite?

Lack of sleep makes us want to eat and hunger takes away the desire to sleep. But why is this relationship between hunger and sleep due? A team of biologists has managed to isolate the genes that regulate it, according to 'Current Biology'.

The keys to natural immunity against AIDS

A team of scientists from the Massachusetts Institute of Technology (MIT), the Ragon Institute at Massachusetts General Hospital (MGH) and Harvard University have discovered that the special gene possessed by people who are naturally immune to HIV, HLA B57, it causes the body to make more of the more efficient immune system cells.

Why are mosquito repellants less and less effective?

Mosquitoes inherit resistance to the most common repellent used to defend ourselves from their bites, the insecticide DEET (N, N-diethylmetatoluamide), according to a study by British and Swedish scientists published today in the journal PNAS.

Spring alters … the biological clock

When spring arrives and the daylight hours are prolonged, changes in the body take place. We feel healthier, more dynamic, optimistic and full of energy. Why? A UK research team has unraveled the processes that control hormonal changes over the seasons. Their findings are published in the journal Current Biology, and they could be helpful in treating seasonal affective disorder (SAD).

Frog genes

From a genetic point of view, frogs and humans are first cousins. This is the conclusion reached by an international team of researchers, who have decoded for the first time the genome of an amphibian, the African frog Xenopus tropicalis.

Embryos with the DNA of a man and two women

Researchers at the University of Newcastle, in the United Kingdom, have developed a pioneering fertility technique that allows embryos to be obtained from the DNA of one man and two women. This advance could help mothers with certain genetic disorders to have healthy children.

Truffle genome sequenced

The genome of the black truffle (Tuber melanosporum), an underground fungus highly valued for its culinary interest, which develops in symbiotic association with the roots of certain trees (especially holm oaks, oaks and hazelnuts), has just been sequenced at the Institute National Agronomic Research in Champenoux (France).

Everything stays in the family

For the first time in history, a team of scientists has analyzed the DNA sequence of two parents and two children who are members of the same family. According to experts, this is one of the greatest advances in this area since the human genome was first decoded in 2003.

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