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United States Department of Agriculture

Agricultural Research Service

Steven M Colegate
Poisonous Plant Research
Research Chemist

Phone: (435) 752-2941 ext. 1206
Fax: (435) 753-5681
1150 EAST 1400 NORTH
POISONOUS PLANT RESEARCH LAB
LOGAN, UT, 84341


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Semi-automated separation of the epimeric dehydropyrrolizidine alkaloids lycopsamine and intermedine: Preparation of their N-oxides and NMR comparison with diastereoisomeric rinderine and echinatine - (Peer Reviewed Journal) - (02-Feb-14)
Natural and experimental poisoning of goats with the pyrrolizidine alkaloid-producing plant Crotalaria retusa L - (Peer Reviewed Journal)
Maia, L.A., De Lucena, R.B., Da T Nobre, V.M., Dantas, A.F., Colegate, S.M., Riet-Correa, F. 2013. Natural and experimental poisoning of goats with the pyrrolizidine alkaloid-producing plant Crotalaria retusa L. Journal of Veterinary Diagnostic Investigation. 25(5): 592-5.
Pulmonary and hepatic lesions caused by the dehydropyrrolizidine alkaloid-producing plants Crotalaria juncea and Crotalaria retusa in donkeys - (Peer Reviewed Journal)
Pessoa, C.R., Pessoa, A.F., Maia, L.A., Medeiros, R.M., Colegate, S.M., Barros, S.S., Soares, M.P., Borges, A.S., Riet-Correa, F. 2013. Pulmonary and hepatic lesions caused by the dehydropyrrolizidine alkaloid-producting plants Crotalaria juncea and Crotalaria retusa in donkeys. Toxicon. 71: 113-20.
Persistence of echimidine, a hepatotoxic pyrrolizidine alkaloid, from honey into mead Reprint Icon - (Peer Reviewed Journal)
Cao, Y., Colegate, S.M., Edgar, J.A. 2013. Persistence of echimidine, a hepatotoxic pyrrolizidine alkaloid, from honey into mead. Journal of Food Composition and Analysis. 29(2): 106-9.
Identification of a lycopsamine-N-oxide chemotype of Amsinckia intermedia - (Peer Reviewed Journal)
Colegate, S.M., Gardner, D.R., Davis, T.Z., Welsh, S.L., Betz, J.M., Panter, K.E. 2013. Identification of a lycopsamine-N-oxide chemotype of Amsinckia intermedia. Biochemical Systematics and Ecology. 48: 132-5.
Dehydropyrrolizidine alkaloids in two Cryptantha species: Including two new open chain diesters one of which is amphoteric - (Peer Reviewed Journal)
Colegate, S.M., Gardner, D.R., Davis, T.Z., Betz, J.M., Panter, K.E. 2013. Dehydropyrrolizidine alkaloids in two Cryptantha species: Including two new open chain diesters one of which is amphoteric. Phytochemical Analysis. 24: 201-12.
Dietary exposure of livestock and humans to hepatotoxic natural products Reprint Icon - (Book / Chapter)
Colegate, S.M., Stegelmeier, B.L., Edgar, J.A. 2012. Dietary exposure of livestock and humans to hepatotoxic natural products. In: Fink-Gremmels, J., editor. Animal Feed Contamination: Effects on Livestock and Food Safety. Philadelphia, PA: Woodhead Publishing Series in Food Sciences, Technology and Nutrition. p. 352-82.
Dehydropyrrolizidine alkaloids, including monoesters with an unusual esterifying acid, from cultivated Crotalaria juncea (Sunn Hemp cv. 'Tropic Sun') - (Peer Reviewed Journal)
Colegate, S.M., Gardner, D.R., Joy, R.J., Betz, J.M., Panter, K.E. 2012. Dehydropyrrolizidine alkaloids, including monoesters with an unusual esterifying acid, from cultivated Crotalaria juncea (Sunn Hemp cv. 'Tropic Sun'). Journal of Agricultural and Food Chemistry. 60: 3541-50.
Detection and measurement of carbohydrate deficient transferrin in serum using immuno-capture mass spectrometry: Diagnostic applications for annual regrass toxicity and corynetoxin exposure - (Peer Reviewed Journal)
Penno, M.A., Colegate, S.M., Michalski, W.P., Hoffmann, P. 2012. Detection and measurement of carbohydrate deficient transferrin in serum using immuno-capture mass spectrometry: Diagnostic applications for annual regrass toxicity and corynetoxin exposure. Research in Veterinary Science. 93(2): 611-7.
Detection of high levels of pyrrolizidine-N-oxides in the endangered plant cryptantha crassipes (Terlingua creek cat's-eye)using HPLC-ESI-MS - (Peer Reviewed Journal)
Williams, M.T., Warnock, B.J., Betz, J.M., Beck, J.J., Gardner, D.R., Lee, S.T., Molyneux, R.J., Colegate, S.M. 2011. Detection of high levels of pyrrolizidine-N-oxides in the endangered plant cryptantha crassipes (Terlingua creek cat's-eye)using HPLC-ESI-MS. Phytochemical Analysis. 22(3): 532-540
Pyrrolizidine alkaloids in food: A spectrum of potential health consequences Reprint Icon - (Peer Reviewed Journal)
Edgar, J.A., Colegate, S.M., Boppre, M., Molyneux, R.J. 2011. Pyrrolizidine alkaloids in food: A spectrum of potential health consequences. Journal of Food Additives & Contaminants. Part A. 28(3):308-24.
Pyrrolizidine alkaloid toxicity in livestock: A paradigm for human poisoning Reprint Icon - (Peer Reviewed Journal)
Molyneux, R.J., Gardner, D.R., Colegate, S.M., Edgar, J.A. 2011. Pyrrolizidine alkaloid toxicity in livestock: A paradigm for human poisoning. Journal of Food Additives & Contaminants. Part A. 28(3): 293-307.
Tremetone and structurally related compounds in white snakeroot (Ageratina altissima): A plant associated with trembles and milk sickness - (Peer Reviewed Journal)
Lee, S.T., Davis, T.Z., Gardner, D.R., Colegate, S.M., Cook, D., Green, B.T., Meyerholtz, K.A., Wilson, C.R., Stegelmeier, B.L., Evans, T.J. 2010. Tremetone and structurally related compounds in white snakeroot (Ageratina altissima): A plant associated with trembles and milk sickness. Journal of Agricultural and Food Chemistry. 58(15):8560-65. DOI: 10.1021/jf1012456.
Last Modified: 7/30/2014
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