2565-01-7Relevant articles and documents
Synthetic studies and pharmacological evaluations on the MDMA ('Ecstasy') antagonist nantenine
LeGendre, Onica,Pecic, Stevan,Chaudhary, Sandeep,Zimmerman, Sarah M.,Fantegrossi, William E.,Harding, Wayne W.
, p. 628 - 631 (2010)
The naturally occurring aporphine alkaloid nantenine, has been shown to antagonize behavioral and physiological effects of MDMA in mice. We have synthesized (±)-nantenine via an oxidative cyclization reaction with PIFA and evaluated its binding profile against a panel of CNS targets. To begin to understand the importance of the chiral center of nantenine with regards to its capacity to antagonize the effects of MDMA in vivo, (R)- and (S)-nantenine were prepared and evaluated in a food-reinforced operant task in rats. Pretreatment with either nantenine enantiomer (0.3 mg/kg ip) completely blocked the behavioral suppression induced upon administration of 3.0 mg/kg MDMA. (±)-Nantenine displayed high affinity and selectivity for the α1A adrenergic receptor among several other receptors suggesting that this α1 subtype may be significantly involved in the anti-MDMA effects of the enantiomers.
Evaluation of structural effects on 5-HT2A receptor antagonism by aporphines: Identification of a new aporphine with 5-HT2A antagonist activity
Ponnala, Shashikanth,Gonzales, Junior,Kapadia, Nirav,Navarro, Hernan A.,Harding, Wayne W.
, p. 1664 - 1667 (2014/04/17)
A set of aporphine analogs related to nantenine was evaluated for antagonist activity at 5-HT2A and α1A adrenergic receptors. With regards to 5-HT2A receptor antagonism, a C2 allyl group is detrimental to activity. The chiral center of nantenine is not important for 5-HT2A antagonist activity, however the N6 nitrogen atom is a critical feature for 5-HT2A antagonism. Compound 12b was the most potent 5-HT2A aporphine antagonist identified in this study and has similar potency to previously identified aporphine antagonists 2 and 3. The ring A and N6 modifications examined were detrimental to α1A antagonism. A slight eutomeric preference for the R enantiomer of nantenine was observed in relation to α1A antagonism.