Do dopamine D2 receptors regulate unconditioned fear in deep layers of the superior colliculus and dorsal periaqueductal gray?
These findings suggest that dopamine, through D2 receptors in the dlSC and dPAG, is involved in defense reactions that are organized in the midbrain tectum.
This study demonstrates the presence of mast cells with TNF-alpha-containing secretory granules, particularly in the shoulder region of human coronary atheromas. By releasing their TNF-alpha, mast cells may play an active role in the inflammatory reactions of these rupture-prone areas of atheromas.