2020考研英语阅读：脱发元凶时间：2019-10-18 09:45:48 来源：文都网校 分享：
If you're worried about your receding hairline and you live in a city, you might want to considermoving, as scientists have found exposure to high levels of air pollution may be linked to hairloss.
New research presented at the European Academy of Dermatology and Venereology (EADV) Congress in Madrid found particulate matter (PM) – that is present in polluted air – couldimpact both hair growth and retention.
The team took cells, known as dermal papilla, from the base of hair follicles on the humanscalp and then exposed them to the polluted air. They used various concentrations of PM10-like fine dust and diesel particulate extract (found naturally in areas with high use of vehicles).
Then, 24 hours later, they tested the samples to detect whether specific hair-growth proteinsin the cells had changed at all.
Researchers found the presence of PM10 and diesel particulate decreased levels of the proteinresponsible for hair growth – beta-catenin – and morphogenesis.
Morphogenesis is the biological process that causes an organism to develop its shape. It is oneof three fundamental aspects of developmental biology.
According to the study, the levels of three other proteins which are responsible for hair growthand hair retention – cyclin D1, cyclin E and CDK2 – were also decreased.
This meant that the greater the level of pollutant, the greater the decrease in proteins wasfound. This is one of the first studies to look at the link between pollution and baldness.
Hyuk Chul Kwon from the Future Science Research Centre in South Korea, said: "While the linkbetween air pollution and serious diseases such as cancer, chronic obstructive pulmonarydisease (COPD) and cardiovascular disease (CVD) are well established, there is little to noresearch on the effect of particulate matter exposure on the human skin, and hair inparticular.
"Our research explains the mode of action of air pollutants on human follicle dermal papillacells, showing how the most common air pollutants lead to hair loss."