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Arteries from distinct regions of the body have unique immune functions
Date:9/3/2008

teria.

Each type of artery had a different set of Toll-like receptor genes turned on, the authors found. In contrast to arteries, veins could not be stimulated through Toll-like receptors.

For example, cells in the iliac arteries, located in the vicinity of the gut, respond avidly to flagellae but cells from the subclavian arteries, which transport blood to the upper body, do not.

A possible explanation is that dendritic cells from iliac arteries are better able to sense flagellae because of the abundant bacterial flora that inhabits the gut, Weyand says.

Weyand hypothesizes that the dendritic cells in arteries are mainly performing a protective, calming function. Arteries are in constant contact with blood borne infectious agents, with potentially dangerous consequences of damaging the vessel wall.

"It's when that protective function breaks down that we see inflammation and various vascular diseases," she says.

She says her team is now investigating how the dendritic cells in arteries move and change as they receive various signals.


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Contact: Holly Korschun
hkorsch@emory.edu
404-727-3990
Emory University
Source:Eurekalert

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