To investigate NO functions, photocontrollable NO donors, compounds which release NO in response to light, are expected to be potentially useful.
To obtain direct evidence for NO functions in vivo, a novel fluorescent probe for NO, 1,3,5,7-tetramethyl-8- 3′,4′-diaminophenyl -difluoroboradiaza-s-indacence (TMDABODIPY) was designed and synthesized, which features high photostability and no pH dependency over a wide pH range.
It is obvious that NO functions as a controlling mechanism against ET-1-induced vasoconstriction.
eNOS is expressed primarily in vascular endothelial cells where NO functions in a paracrine manner to regulate vasodilation.
This substance acts as a nitric oxide (NO) donor; in the vascular endothelium NO functions as a regulator of vascular tone, and thereby of microvascular perfusion [ 11].
The broad conclusion to be drawn is that NO functions in the mammalian CNS more or less like a conventional neurotransmitter, in much the way it does in animals that evolved hundreds of millions of years ago.
Interestingly, the mentioned observations suggest that the release of NO is sustained, regardless of whether acid secretion is stimulated, which implies that NO functions as an endogenous inhibitor of gastric acid secretion.
Nitric oxide (NO) functions widely as a transmitter in the central and peripheral nervous systems, exerting its physiological effects by stimulating receptors having intrinsic guanylyl cyclase activity, thereby leading to cGMP accumulation in target cells (Garthwaite, 2008).
