Left: the silk mesh 1 day after being seeded with fibroblast cells. Right: 4 days after seeding.
What’s the News: People have long known that spider silk has many practical uses, even in the medical field; Ancient Greeks, for example, employed the strong, flexible fiber as bandages. But the clinical uses of spider silk may stretch beyond that: scientists may someday be able to use the silk to help create artificial skin, according to new research out of the Hannover Medical School in Germany. In the study, published recently in the journal PLoS One, researchers successfully grew tissue-like skin on a mesh frame of silk harvested from golden silk orb-weaver spiders.
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Since its emergence in the early 1980s, the drug isotretinoin—used to treat severe acne and sold under a host of different brand names—has been subject to controversy over whether it increases the incidence of suicide attempts in those who take it. But sorting out whether the drug, the acne itself, or some other factor is driving increased suicide risk is quite difficult.
So for a study out in the British Medical Journal, a team of researchers in Sweden looked at a deluge of data for 5,756 people who took the drug. Their conclusion: Severe acne patients who took isotretinoin had an increased risk for suicide attempts both before and after taking it, so they can’t definitively link isotretinoin to suicide.
The drug, perhaps best known as the pharmaceutical company Roche’s Accutane, has been embraced by dermatologists and their suffering patients, but has also been dogged by controversy for its side effects.
While powerful at clearing acne, the drug has been linked to birth defects if taken during pregnancy and has also been suspected of causing mental side effects, although Roche has vigorously defended personal injury claims in this area. [Reuters]
Anders Sundstrom led the current research, which seems to support the theory that the pharmaceutical isn’t a threat to mental health. Said Sundstrom:
“The underlying condition of acne is a more important factor for suicide attempts. We are not certain the drug adds anything.” [BBC News]
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From “When the Robots Sing ‘Touch-A, Touch-A, Touch-Me,’ the E-Skin Is Working,” on the DISCOVER blog Science Not Fiction:
That’s right, e-skin. A group of scientists at UC-Berkeley devised a flexible mesh using nanowires to create a substance that reacts to pressure, and, as their paper in Nature Materials said, “effectively functions as an artificial electronic skin.” In the same issue, a team from Stanford University announced it had devised a kind of skin so sensitive, it can detect the weight of a bluebottle fly. All of which means for one shining issue, a scientific journal was a skin mag.
Read the rest of this post (with video).
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Image: UC Berkeley
Researchers are singing a song of praise for armpits, groins, and all the other moist parts of the body that polite society prefers not to contemplate.
On the microbial level, a person’s underarms are akin to lush rain forests brimming with diversity—and that’s a good thing—according to a new “topographic map” of human skin. Most of our skin is like an arid desert, said study co-author Julia Segre… “But as you walk through this desert you encounter an oasis, which is the inside of your nose,” she said. “You encounter a stream, which is a moist crease. [These] areas are like habitats rich in diversity” [National Geographic News]. In the new study, the researchers cataloged the bacteria distributed across human skin, and note that a better understanding of these native bacteria of the epidermis may help doctors promote skin health and fight skin diseases.
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