Natalie Johnson, Ph.D.

Natalie Johnson, Ph.D.

Assistant Professor

Environmental and Occupational Health
212 Adriance Lab Rd.
1266 TAMU
College Station, TX   77843-1266

Education and Training

Johns Hopkins Bloomberg School of Public Health
Postdoctoral fellowship, Environmental Health Sciences

Texas A&M University College of Veterinary Medicine
PhD,  Toxicology

Texas A&M University College of Science
BS, Biology

Research Interests

  • Environmental toxicology
  • Prenatal exposures
  • Air pollution
  • Polycyclic aromatic hydrocarbons
  • Epigenetics
  • Childhood asthma
  • Population-based mouse models
  • Aflatoxin and growth stunting
  • Dietary interventions
  • Outreach activities: environmental sustainability, undergraduate research mentoring, diversity in training

Selected Publications

  • Johnson NM, Egner PA, Baxter V, Sporn MB, Sutter TR, Groopman JD, Kensler TW, Roebuck BD. 2014. Complete protection against aflatoxin B1-induced liver cancer with a triterpenoid: DNA adduct dosimetry, molecular signature and genotoxicity threshold. Cancer Prev Res 7(7):658-65.

  • Kensler KH, Dolan P, Slocum S, Johnson NM, Ilic Z, Sell S, Groopman JD, Kensler TW, Egner PA. 2014. Genetic or pharmacologic activation of Nrf2 signaling fails to protect against aflatoxin genotoxicity in hypersensitive GSTA3 knockout mice. Toxicol Sci 139(2):293-300.

  • Marroquín-Cardona A, Johnson NM, Phillips TD, Hayes AW. 2014. Mycotoxins in a changing global environment: a review. Food Chem Toxicol 69C:220-230.

  • Mitchell NJ, Kumi J, Johnson NM, Dotse E, Marroquin-Cardona A, Wang JS, Jolly PE, Ankrah NA, Phillips TD. 2013. Reduction in the urinary aflatoxin M1 biomarker as an early indicator of the efficacy of dietary interventions to reduce exposure to aflatoxins. Biomarkers 18(5):391-8.

  • Taylor JF, Robinson A, Mitchell NJ, Marroquin-Cardona A, Johnson NM, Elmore SE, Romoser AA, Phillips TD. 2013. In vivo efficacy of ferrihydrite as an enterosorbent for arsenic: short-term evaluation in rodents. J Toxicol Environ Health A 76(3):167-75.

  • Robinson A, Johnson NM, Strey A, Taylor JF, Marroquín-Cardona A, Mitchell NJ, Afriyie-Gyawu E, Ankrah NA, Williams JH, Wang JS, Jolly PE, Nachman RJ, Phillips TD. 2012. Calcium montmorillonite clay reduces urinary biomarkers of fumonisin B1 exposure in rats and humans. Food Addit Contam 29(5):809-18.

  • Marroquín-Cardona A, Deng Y, Garcia-Mazcorro JF, Johnson NM, Mitchell NJ, Tang L, Robinson A, Taylor JF, Wang JS, Phillips TD. 2011. Characterization and safety of uniform particle size NovaSil clay as a potential aflatoxin enterosorbent. Appl Clay Sci 54(3-4):248-57.

  • Johnson NM, Qian G, Xu L, Tietze D, Marroquín-Cardona A, Robinson A, Rodriguez M, Kaufman L, Cunningham K, Wittmer J, Guerra F, Donnelly KC, Williams JH, Wang JS, Phillips TD. 2010. Aflatoxin and PAH exposure biomarkers in a U.S. population with a high incidence of hepatocellular carcinoma. Sci Total Environ 408(23):6027-31.

  • Williams JH, Grubb JA, Davis JW, Wang JS, Jolly PE, Ankrah NA, Ellis WO, Afriyie-Gyawu E, Johnson NM, Robinson A, Phillips TD. 2010. HIV and hepatocellular and esophageal carcinomas related to consumption of mycotoxin-prone foods in sub-Saharan Africa. Am J Clin Nutr 92(1):154-60.

  • Johnson NM, Afriyie-Gyawu E, Huebner HJ, Marroquin-Cardona A, Robinson A, Tang L, Xu L, Ankrah NA, Ofori-Adjei D, Jolly PE, Williams JH, Wang JS, Phillips TD. 2009. PAH Exposure in a Ghanaian population at high risk for aflatoxicosis. Sci Total Environ 407(6):1886-91.

  • Taylor JF, Robinson A, Johnson NM, Marroquín-Cardona A, Brattin B, Taylor R, Phillips TD. 2009. In vitro evaluation of ferrihydrite as an enterosorbent for arsenic from contaminated drinking water. Environ Sci Technol 43(14):5501-6.

  • Marroquín-Cardona A, Taylor JF, Hallmark CT, Deng Y, Johnson NM, Phillips TD. 2009. In vitro and in vivo characterization of mycotoxin-binding additives used for animal feeds in México. Food Addit Contam 26(5):733-43.

  • Afriyie-Gyawu E, Wang Z, Ankrah NA, Xu L, Johnson NM, Tang L, Guan H, Huebner HJ, Jolly PE Ellis WO, Taylor R, Brattin B, Ofori-Adjei D, Williams JH, Wang JS, Phillips TD. 2008. NovaSil clay does not affect the concentrations of vitamins A and E and nutrient minerals in serum samples from Ghanaians at high risk for aflatoxicosis. Food Addit Contam 25(7):872-84.

  • Wang P, Afriyie-Gyawu E, Tang Y, Johnson NM, Xu L, Tang L, Huebner HJ, Ankrah NA, Ofori-Adjei D, Ellis WO, Jolly PE, Williams JH, Wang JS, Phillips TD. 2008. NovaSil clay intervention in Ghanaians at high risk for aflatoxicosis: II. Reduction in biomarkers of aflatoxin exposure in blood and urine. Food Addit Contam 25(5):622-34.

  • Afriyie-Gyawu E, Ankrah NA, Huebner HJ, Ofosuhene M, Kumi J, Johnson NM, Tang L, Xu L, Ofori-Adjei D, Williams JH, Wang JS, Phillips, TD. 2008. NovaSil clay intervention in Ghanaians at high risk for aflatoxicosis: I. Study design and clinical outcomes. Food Addit Contam 25(1):76-87.

  • Phillips TD, Afriyie-Gyawu E, Williams JH, Huebner HJ, Ankrah NA, Ofori-Adjei D, Jolly PE, Johnson NM, Taylor JF, Marroquín-Cardona A, Xu L, Tang L, Wang JS. 2008. Reducing human exposure to aflatoxin through use of clay: a review. Food Addit Contam 25(2):134-45.