Previous in vivo studies have shown that febrile temperatures dynamically stimulate adhesion in differentiated high endothelial venules (HEV) , which are portals for lymphocyte extravasation.
It has been previously reported that endothelial cells exposed to constant high concentrations of glucose upregulate the expression of adhesion molecules.
At 0.1 microM NAD as substrate pmol quantities of monomeric ADP-ribose adducts per mg DNA were formed and the main acceptors were sharply discernable on the basis of molecular mass as histones , high mobility non-histone proteins , two protein groups of a mass of 66 and 44 kD respectively , and the poly (ADP-ribose) polymerase enzyme protein of 119 kD mass..
Identification of these products and reversibility of the reaction show that the ADP-ribose moiety of NAD + is the molecular species that is transferred to the acceptor protein.