摘要:
The 2',6'-dimethyl-L-tyrosine (Dmt) enhances receptor affinity, functional bioactivity and in vivo analgesia of opioid peptides. To further investigate its direct influence on these opioid parameters, we developed a series of compounds (H-Dmt-NH-X). Among them, H-Dmt-NH-CH3 showed the highest affinity (K(i)mu = 7.45 nM) equal to that of morphine, partial mu-opioid agonism (E-max = 66.6%) in vitro and a moderate antinociception in mice. (C) 2004 Elsevier Ltd. All rights reserved.