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United States Department of Agriculture

Agricultural Research Service

Adele J Showker (Jency)
Toxicology and Mycotoxin Research
Biological Science Lab Technician (Biochemistry)

Phone: (706) 546-3176
Fax: (706) 546-3116
Room 362
USDA, ARS, SAA
RBRRC
950 COLLEGE STATION ROAD
ATHENS, GA, 30605-2720


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Evidence for Fumonisin inhibition of ceramide synthase in humans: validation in follow-up studies in Guatemala - (Abstract Only)
Riley, R.T., Showker, A.J., Voss, K.A., Gelineau-Van Waes, J., Maddox, J.R., Ashley-Koch, A.E., Gregory, S.G., Matuate, J., Torres, O. 2014. Evidence for Fumonisin inhibition of ceramide synthase in humans: validation in follow-up studies in Guatemala. Toxicologist. 138(1):86.
Urinary fumonisin B1 and estimated fumonisin intake in women from high and low exposure communities in Guatemala Reprint Icon - (Peer Reviewed Journal)
Torres, O., Matute, J., Gelineau-Van Waes, J., Maddox, J.R., Gregory, S.G., Ashley-Koch, A.E., Showker, A.J., Zitomer, N.C., Voss, K.A., Riley, R.T. 2014. Urinary fumonisin B1 and estimated fumonisin intake in women from high and low exposure communities in Guatemala. Molecular Nutrition and Food Research. 58(5):973-983. doi: 10.1002/mnfr.201300481.
Development of biomarkers to assess fumonisin exposure and birth defects - (Book / Chapter)
Riley, R.T., Voss, K.A., Showker, A.J., Torres, O., Matute, J., Maddox, J.R., Rainey, M., Gardner, N.M., Sachs, A., Gregory, S.G., Ashley-Koch, A.E., Krupp, D., Gelineau-Van Waes, J. 2012. Development of biomarkers to assess fumonisin exposure and birth defects. In: Binder, E.M., editor. Proceedings of the World Nutrition Forum, October 10-13, 2012, Marina Bay, Singapore. p. 249-256.
The kinetics of urinary fumonisin B1 excretion in humans consuming maize-based diets Reprint Icon - (Peer Reviewed Journal)
Riley, R.T., Torres, O., Showker, A.J., Zitomer, N.C., Matute, J., Voss, K.A., Gelineau-van Waes, J., Maddox, J.R., Gregory, S.G., Ashley-Koch, A.E. 2012. The kinetics of urinary fumonisin B1 excretion in humans consuming maize-based diets. Molecular Nutrition and Food Research. 56:1445-1455.
Evidence for fumonisin inhibition of ceramide synthase in humans - (Abstract Only)
Riley, R.T., Showker, A.J., Voss, K.A., Gelineau-van Waes, J., Maddox, J.R., Gregory, S.G., Ashley-Koch, A.E., Torres, O. 2012. Evidence for fumonisin inhibition of ceramide synthase in humans [abstract]. The Toxicologist (supplement to Toxicological Sciences). 126(1):237.
Time and Dose-Dependent Changes in Sphingoid Base 1-Phosphates in Tissues from Rats Fed Diets Containing Fumonisins - (Abstract Only)
Riley, R.T., Showker, A.J., Voss, K.A. 2005. Time- and dose-dependent changes in sphingoid base 1-phosphates in tissues from rats fed diets containing fumonisins [abstract]. Toxicological Sciences. 84(S1):284-285.
Inhibition of Sphingolipid Biosynthesis Decreases Phosphorylated Erk2 in Llc-Pk1 Cells. - (Peer Reviewed Journal)
Rentz, S.S., Showker, A.J., Meredith, F.I., Riley, R.T. 2005. Inhibition of sphingolipid biosynthesis decreases phosphorylated ERK2 in LLC-PK1 cells. Food and Chemical Toxicology. 43:123-131.
Inhibition of Ceramide Synthase in Corn Seedlings Infected with Fusarium Verticillioides Or Exposed Directly to Fumonisin B1 in Soil - (Abstract Only)
Williams, L.D., Glenn, A.E., Bacon, C.W., Showker, A.J., Riley, R.T. 2003. INHIBITION OF CERAMIDE SYNTHASE IN CORN SEEDLINGS INFECTED WITH FUSARIUM VERTICILLIOIDES OR EXPOSED DIRECTLY TO FUMONISIN B1 IN SOIL. Toxicologist. v.77. Abstract. p. 189.
Inhibition of Ceramide Synthase in Corn Seedlings Infected with Fusarium Verticillioides Or Exposed Directly to Fumonisin B1 in Soil - (Abstract Only)
WILLIAM, L.D., GLENN, A.E., BACON, C.W., SHOWKER, A.J., RILEY, R.T. 2003. INHIBITION OF CERAMIDE SYNTHASE IN CORN SEEDLINGS INFECTED WITH FUSARIUM VERTICILLIOIDES OR EXPOSED DIRECTLY TO FUMONISIN B1 IN SOIL. TOXICOLOGIST. v.77. Abstract p.189.
Kinetics and Binding of Fumonisin in a Model Soil System - (Abstract Only)
Williams, L.D., Bacon, C.W., Showker, A.J., Meredith, F.I., Franzluebbers, A.J., Smith, M.A., Wyatt, R., Riley, R.T. 2002. KINETICS AND BINDING OF FUMONISIN IN A MODEL SOIL SYSTEM. Toxicologist. 66:69-70.
Inhibition of DE Novo Sphingolipid Biosynthesis Reduces Expression of P42 Map Kinase (Erk2) in Llc-Pk1 Cells - (Abstract Only)
RENTZ, S.S., SHOWKER, A.J., MEREDITH, F.I., RILEY, R.T. 2002. INHIBITION OF DE NOVO SPHINGOLIPID BIOSYNTHESIS REDUCES EXPRESSION OF P42 MAP KINASE (ERK2) IN LLC-PK1 CELLS. MYCOPATHOLOGIA. v.155. Abstract p.39.
Kinetics and Binding of Fumonisin in a Model Soil System - (Abstract Only)
WILLIAM, L.D., SHOWKER, A.J., BACON, C.W., SMITH, M.A., WYATT, R.D., MEREDITH, F.I., RILEY, R.T. 2002. KINETICS AND BINDING OF FUMONISIN IN A MODEL SOIL SYSTEM. MYCOPATHOLOGIA. v.155. Abstract p.40.
Disruption of Sphingolipid Metabolism and Induction of Equineleukoencephalomalacia by Fusarium Proliferatum Culture Material Containing Fumonisin B2 Or Fumonisin B3 - (Peer Reviewed Journal) - (21-Apr-97)
Elevated Free Sphingoid Bases and Complex Sphingolipid Depletion As Contributing Factors in Fumonisin-Induced Inhibition of Cell Growth and Increased Cell Death in Llc-Pk1 Cells - (Peer Reviewed Journal) - (26-Feb-96)
Last Modified: 10/24/2014