Actions of piperidine alkaloid teratogens at fetal nicotinic acetylcholine receptors.
Teratogenic alkaloids are found in many species of plants including Conium maculatum L., Nicotiana glauca, Nicotiana tabaccum, and multiple Lupinus spp. Fetal musculoskeletal defects produced by alkaloids from these plants include arthrogyropisis, scoliosis, torticollis, kyposis, lordosis, and cleft palate. A pharmacodynamic comparison of the alkaloids ammodendrine, anabasine, anabaseine, anagyrine, and coniine in SH-SY5Y cells and TE-671 cells was made. These alkaloids and their enantiomers were more effective in depolarizing TE-671 cells which express the human fetal-muscle type nicotinic acetylcholine receptor (nAChR) relative to SH-SY5Y cells which predominately express autonomic nAChRs. The rank order of potency in TE-671 cells was: anabaseine>(+)-anabasine>(-)-anabasine > (+/-)-anabasine>anagyrine>(-)-coniine > (+/-)-coniine>(+)-coniine>(+/-)-ammodendrine>(+)-ammodendrine. The rank order potency in SH-SY5Y cells was: anabaseine>(+)-anabasine>(-)-coniine>(+)-coniine>(+)-ammodendrine>anagyrine>(-)-anabasine>(+/-)-coniine>(+/-)-anabasine>(-)-ammodendrine. The actions of these alkaloids at nAChRs in both cell lines could be distinguished by their maximum effects in depolarizing cell membrane potential. The teratogenic action of these compounds may be related to their ability to activate and subsequently desensitize nAChRs.
Green
Benedict T
BT
Poisonous Plant Research Laboratory, Agricultural Research Service, United States Department of Agriculture, 1150 E. 1400 N., Logan, UT 84341, USA. ben.green@ars.usda.gov <ben.green@ars.usda.gov>
Lee
Stephen T
ST
Panter
Kip E
KE
Welch
Kevin D
KD
Cook
Daniel
D
Pfister
James A
JA
Kem
William R
WR
D000470:Alkaloids / Q000737:chemistry / Q000633:toxicity*; D000818:Animals; D001681:Biological Assay; D045744:Cell Line, Tumor; D004305:Dose-Response Relationship, Drug; D006801:Humans; D007928:Lethal Dose 50; D008297:Male; D008564:Membrane Potentials / Q000187:drug effects; D051379:Mice; D015394:Molecular Structure; D009132:Muscles / Q000196:embryology / Q000201:enzymology; D009139:Musculoskeletal Abnormalities / Q000139:chemically induced / Q000201:enzymology; D010880:Piperidines / Q000737:chemistry / Q000633:toxicity*; D011978:Receptors, Nicotinic / Q000235:genetics / Q000378:metabolism*; D013723:Teratogens / Q000737:chemistry / Q000633:toxicity*; D014162:Transfection
D000470:Alkaloids; D010880:Piperidines; D011978:Receptors, Nicotinic; D013723:Teratogens