The nucleus is impenetrable by design. Its membrane is a highly fortified barrier that shields our genetic code, letting in ...

The chemical barrier is made up of mucus and digestive fluids secreted by intestinal epithelial cells, and antibacterial substances produced by microbes. Goblet cells secrete a translucent mucin ...

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The authors do not work for, consult, own shares in or receive funding from any company or organization that would benefit from this article, and have disclosed no relevant affiliations beyond ...

Tiny cellular tubes between neurons and brain cells called microglia serve as conduits for the export of toxic protein aggregates from neurons and the import of healthy organelles, keeping ...