One of our great pleasures in life is to stand amazed when someone does something amazingly clever. Especially when you get that feeling that what they did was there, waiting to be done, all along. Which is why we bring you two such stories, all gift wrapped up by the admirable Nature Briefings and BBC, for you to click on at your delight.
A Cure for HIV? Anyone who lived through the 1980s will recall the terrible ravages of the AIDS pandemic, caused of course by the HIV virus. Even if you were lucky enough to be in a low-risk group, we all knew someone or a local community organisation who suffered the ravages. Sad. Sad. Sad. Now that old friend of LSS, CRISPR gene editing may actually offer some hope towards the final elimination of the virus from our genomes. It’s early days yet, as both Michelle Roberts of the BBC and the researchers themselves say. Proof of concept and all that. Good, it’s better to be cautious. But if they can “snip” the HIV virus out of your cells, what else might not be achieved?[1]
Ghost DNA made us brainy Talking of embedded DNA, many a 1980s conversation concerned all that mysterious DNA lying around our genomes that didn’t seem to do anything (no, it was mainly about EastEnders-ed) Was it some of it ancient embedded viruses that attacked our ancestors long ago, in some forgotten Permian Pandemic? Well, get this from Nature Briefings, Virus Helped Brain Evolution
Remnants of an ancient viral infection are essential for producing myelin, a protein that insulates nerve fibres, in most vertebrates. Certain viruses insert DNA into the genetic material of the cells they invade. Sometimes, these insertions become permanent and even aid evolutionary processes. Myelin helps nerves to send electrical signals faster, grow longer and thinner so they can be packed in more efficiently. “As a result of myelin, brains became more complex and vertebrates became more diverse,” says stem-cell biologist and study co-author Robin Franklin.Science News | 6 min read
Reference: Cell paper
The implications are rather profound. The idea of the single autonomous gene line, the pure selfish individual at the core of your biological identity is rather compromised, isn’t it? What if the genetic “you” isn’t just “you,” but is you+some (rather random )free riders, who may or may not be helpful? That Natural Selection is acting on several of you at once. and may force you to cooperate? What price The Selfish Gene now?
[1]https://www.bbc.co.uk/news/health-68609297
#genetics #dna #rna #hiv #aids #myelin #evolution #CRISPR #medicine
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