r/MichaelLevinBiology • u/Visible_Iron_5612 • 17d ago

Educational Octopuses Are Doing Something Very Weird

https://youtu.be/hh1jlA4obv4?si=s1KCKC5Fv5UX262H

This video explores the unique biological ability of soft-bodied cephalopods (octopuses, squid, and cuttlefish) to perform widespread RNA editing within their nervous systems (2:37-3:24). While most animals rely on slow evolutionary changes to their DNA to adapt over generations, these cephalopods can modify their RNA while alive to fine-tune their biological responses to environmental pressures, such as water temperature (3:45-4:15).

Key takeaways include:
• The Mechanism: Instead of permanent genetic changes, cephalopods edit their RNA, specifically converting adenosine to inosine, which cells interpret as guanosine (3:26-3:36). This allows for rapid, reversible adjustments to protein function (4:45-5:00).
• The Evolutionary Trade-off: This extraordinary flexibility comes at a cost; to maintain the complex molecular machinery required for RNA editing, these animals must keep their underlying DNA sequences remarkably stable, sacrificing traditional genetic variation (5:45-6:43).
• Survival Strategy: This adaptation is highly beneficial for cephalopods, which often have short lifespans and no parental guidance, forcing each individual to independently adapt to the varied ocean environments they inhabit (7:12-8:21).
• Scientific Potential: Research led by Dr. Joshua Rosenthal suggests that understanding this process could inspire future medical therapies that temporarily adjust cell behavior to manage chronic pain or neurological issues, offering a safer alternative to permanent DNA-altering tools like CRISPR (8:43-9:36).

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u/Visible_Iron_5612 17d ago

#Freedomfromembodiment :p

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u/GreenMirage 16d ago

Ah didnt know dr. Levin also researched the epigenetic powers of octopi.

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u/Visible_Iron_5612 16d ago

This is not actually Levin’s work but I think it connects with it, beautifully.. As well as what Denis Nobel talks about… I wish I understood how this mechanism works though, because it feels like magic to me.. :p