Hair follicle stem cells, which promote hair growth, can prolong their life by switching their metabolic state. In experiments conducted with mice, a research group active in Helsinki and Cologne, Germany, has demonstrated that a protein called Rictor holds a key role in the process.
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The study was published in the Cell Metabolism journal.
Mechanisms that regulate stem cells
Ultraviolet radiation and other environmental factors damage our skin and other tissues every day, with the body continuously removing and renewing the damaged tissue. On average, humans shed daily 500 million cells and a quantity of hairs weighing a total of 1.5 grams.
The dead material is replaced by specialised stem cells that promote tissue growth. Tissue function is dependent on the activity and health of these stem cells, as impaired activity results in the ageing of the tissues.
“Although the critical role of stem cells in ageing is established, little
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“What I see is a real skepticism of status quo antitrust,” Chopra said during a conference Tuesday on antitrust and regulatory approaches to digital markets. “We no longer have a monopoly on [setting] policies here. We’ve seen more and more move to legislatures” for decisions about dealing with digital markets.
Overseas, the regulatory efforts are even more intense.
“Europe is in the throes of a major revolution right now,” said Cristina Caffara, a competition economist with Charles River Associates, who represents Amazon, Apple, Russian search engine Yandex and previously worked for News Corp. “These platforms are going to have to change everything.
By far the biggest regulatory overhaul under consideration — and the one causing the most concerns for Amazon, Google and Facebook — is the European Commission’s plan to regulate tech, a legislative package known as the Digital Services Act. Among the proposals under consideration in Brussels is one