Brain upgrade? Snorted stem cells are delivered directly to the brain in minutes.

Stem cells delivered intranasally can bypass the blood-brain barrier and make their way into the brain.

The technique could possibly be useful for delivering other therapies directly into the brain and avoid the systemic effects that can arise when medicines circulate through the bloodstream, reports the European Journal of Cell Biology.

Delivery from the nose to the central nervous system occurs within minutes along both the olfactory and trigeminal neural pathways,

They travelled along the olfactory nerves involved in smell and the trigeminal nerves involved in pain. Within minutes the medicine introduced into the nose made its way into the brain without even entering the bloodstream appreciably for many drugs.

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