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Yamashita saw some images of tiny tubes reaching out from one cell to another — delicate structures that might have been responsible for trafficking. Yamashita was sceptical, but decided to dig out images from her own postdoc project 12 years earlier. Sure enough, slender spikes jutted out towards the targeted cells.
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But Richard Cheney, a cell biologist at the University of North Carolina in Chapel Hill, is not ready to start revising the textbooks.…There’s no question that long, thin protrusions are popping up all over the place, he says… “I’d probably bet on contact-based signalling, where you don’t need very many copies of a molecule, as opposed to them acting like interstate highways,” he says.
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Yamashita speculates that such connections may be more than conceptually related to neuronal synapses. “Membrane protrusions might have evolved first, and higher organisms could have started upgrading them to make neurons for more complicated functions,” she says.
“It would change how we see tissues.”
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