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United States Department of Agriculture

Agricultural Research Service

Related Topics

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

Phone: (706) 546-3176
Fax: (706) 546-3116

Room 362
USDA, ARS, SAA
950 COLLEGE STATION ROAD
RBRRC
ATHENS , GA 306052720


Publications (Clicking on the reprint icon Reprint Icon will take you to the publication reprint.)
Elevated Nuclear Sphingoid Base-1-Phosphates and Decreased Histone Deacetylase Activity after Fumonisin B1 Treatment in Mouse Embryonic Fibroblasts -
Gardner, N., Riley, R.T., Showker, A.J., Voss, K.A., Sachs, A., Maddox, J., Gelineau-Van Waes, J. 2016. Elevated Nuclear Sphingoid Base-1-Phosphates and Decreased Histone Deacetylase Activity after Fumonisin B1 Treatment in Mouse Embryonic Fibroblasts. Journal of Toxicology and Applied Pharmacology. 298: 56-65.
Elevated Nuclear and Cytoplasmic FTY720-Phosphate in Mouse Embryonic Fibroblasts Suggests the Potential for Multiple Mechanisms in FTY720-Induced Neural Tube Defects -
Gardner, N., Riley, R.T., Showker, A.J., Voss, K.A., Sachs, A., Maddox, J., Gelineau-Van Waes, J. 2015. Elevated Nuclear and Cytoplasmic FTY720-Phosphate in Mouse Embryonic Fibroblasts Suggests the Potential for Multiple Mechanisms in FTY720-Induced Neural Tube Defects. Toxicological Sciences. 150(1):161-168.
Evidence for ceramide synthase inhibition in humans exposed to fumonisins in maize-based foods and living in low or high exposure communities in Guatemala -
Riley, R.T., Torres, O., Mutate, J., Grergory, S., Ashley-Koch, A., Showker, A.J., Mitchell, T.R., Maddox, J., Gelineau-Van Waes, J., Voss, K.A. 2016. Evidence for ceramide synthase inhibition in humans exposed to fumonisins in maize-based foods and living in low or high exposure communities in Guatemala. UJNR Toxic Microorganisms Panel Meeting. January 24-29,2016. Tokyo/Nagasaki, Japan.
Fumonisin exposure in women linked to inhibition of an enzyme that is a key event in farm and laboratory animal diseases. -
Riley, R.T., Voss, K.A., Showker, A.J., Mitchell, T.R., Torres, O., Matute, J., Gregory, S., Ashley-Koch, A., Maddox, J., Gelineau-Van Waes, J. 2016. Fumonisin exposure in women linked to inhibition of an enzyme that is a key event in farm and laboratory animal diseases. American Chemical Society Abstracts. San Diego, California., March 13, 2016. AGFD 101.
Evidence for fumonisin inhibition of ceramide synthase in humans consuming maize-based foods and living in high exposure communities in Guatemala -
Riley, R.T., Torres, O., Matute, J., Gregory, S., Ashley-Koch, A., Showker, A.J., Mitchell, T.R., Voss, K.A., Maddox, J., Gelineau-Van Waes, J. 2015. Evidence for fumonisin inhibition of ceramide synthase in humans consuming maize-based foods and living in high exposure communities in Guatemala. Molecular Nutrition and Food Research. 59(11):2209-2224.
Co-occurence of aflatoxins and fumonisins in maize: guatemala as a case study -
Voss, K.A., Torres, O., Matute, J., Gelineau-Van Waes, J., Maddox, J., Gregory, S., Ashley-Kich, A., Showker, A.J., Riley, R.T. 2015. Co-occurence of aflatoxins and fumonisins in maize: guatemala as a case study. Gordon Research Conferences. June 14-19,2015. Easton, Massachusetts.
Co-exposure to fumonisins and aflatoxins in maize-based foods in central america: guatemala as a case study -
Voss, K.A., Torres, O., Matute, J., Gelineau-Van Waes, J., Maddox, J.R., Gregory, S., Ashley-Koch, A.E., Showker, A.J., Riley, R.T. 2015. Co-exposure to fumonisins and aflatoxins in maize-based foods in central america: guatemala as a case study. Society of Toxicology. March 22-26,2015. San Diego,California.
A Blood Spot Method for Detecting Fumonisin-Induced Changes in Putative Sphingolipid Biomarkers in LM/Bc Mice and Humans -
Riley, R.T., Showker, A.J., Lee, C.M., Zipperer, C.E., Mitchell, T.R., Voss, K.A., Zitomer, N.C., Torres, O., Matute, J., Gregory, S.G., Ashley-Koch, A.E., Maddox, J.R., Gardner, N., Gelineau-Van Waes, J. 2015. A Blood Spot Method for Detecting Fumonisin-Induced Changes in Putative Sphingolipid Biomarkers in LM/Bc Mice and Humans. Journal of Food Additives & Contaminants. 32(6):934-949.
Human health implications from co-exposure to aflatoxins and fumonisins in maize-based foods in Latin America: Guatemala as a case study -
Torres, O., Matute, J., Gelineau-Van Waes, J., Maddox, J.R., Gregory, S.G., Ashley-Koch, A.E., Showker, A.J., Voss, K.A., Riley, R.T. 2015. Human health implications from co-exposure to aflatoxins and fumonisins in maize-based foods in Latin America: Guatemala as a case study. World Mycotoxin Journal. 8(2):143-159.
Evidence for Fumonisin inhibition of ceramide synthase in humans: validation in follow-up studies in Guatemala -
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 -
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 -
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 -
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 -
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 -
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. -
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 -
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 -
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 -
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.
FUMONISIN B1 INDUCES DECREASED EXPRESSION OF P42 MAP KINASE IN LLC-PK1 CELLS -
Rentz, S.S., Showker, A.J., Meredith, F.I., Riley, R.T. 2002. FUMONISIN B1 INDUCES DECREASED EXPRESSION OF P42 MAP KINASE IN LLC-PK1 CELLS. Toxicologist. 66:7.
INHIBITION OF DE NOVO SPHINGOLIPID BIOSYNTHESIS REDUCES EXPRESSION OF P42 MAP KINASE (ERK2) IN LLC-PK1 CELLS -
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 -
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 -
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 -
Last Modified: 5/2/2016
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