I just can’t help it. Things annoy me. It bothers me when our DVR records everything but the last minute of a suspense show on TV. I visibly shake my head when, with a carful of passengers blocking my view of the subway stations, the operator announces stops in an inaudible whisper. And don’t get me started about lukewarm food in a restaurant.
Well, I thought I had finally experienced all of the annoyances in life until the other day, when it occurred to me there was yet another: spider webs. I am just sick-and-tired of walking into these invisible air nets as I squeeze around the corner from our deck, scratch myself on the bushes (hmmm, another annoyance) and reach out to turn on the hose to water my garden. Almost every day those webs brush my face and I expect to feel a big, fat spider on the top of my head. Very annoying.
But in this case, at least, there is most definitely a silver lining. I noticed in this week’s ACS PressPac that Scientists have put these silky strands to extraordinarily good use. To wit:
Genetically engineered spider silk could help overcome a major barrier to the use of gene therapy in everyday medicine, according to a new study that reported development and successful initial laboratory tests of such a material. It appears in ACS’ journal Bioconjugate Chemistry.
David Kaplan and colleagues note that gene therapy — the use of beneficial genes to prevent or treat disease — requires safe and efficient carriers or “vectors.” Those carriers are the counterparts to pills and capsules, transporting therapeutic genes into cells in the body. Safety and other concerns surround the experimental use of viruses to insert genes. The lack of good gene delivery systems is a main reason why there are no FDA-approved gene therapies, despite almost 1,500 clinical trials since 1989. The new study focused on one promising prospect, silk proteins, which are biocompatible and have been used in everyday medicine and medical research for decades.
The scientists describe modifying spider silk proteins so that they attach to diseased cells and not healthy cells. They also engineered the spider silk to contain a gene that codes for the protein that makes fireflies glow in order to provide a visual signal (seen using special equipment) that the gene has reached its intended target. In lab studies using mice containing human breast cancer cells, the spider-silk proteins attached to the cancer cells and injected the DNA material into the cells without harming the mice. The results suggest that the genetically-engineered spider-silk proteins represent “a versatile and useful new platform polymer for nonviral gene delivery,” the article notes.
Image: American Chemical Society
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