University of California San Francisco
Helen Diller Family Comprehensive Cancer Center
Gideon St. Helen, PhD

Gideon St. Helen, PhD

Assistant Professor, Department of Medicine, UCSF

Cancer Center Program Memberships

Tobacco Control

Education

Livingstone College, Salisbury, NC, B.S., 05/2006, Biology
University of Georgia, Athens, GA, Ph.D., 08/2011, Toxicology
University of California, San Francisco, CA, Postdoc, 12/2014, Tobacco Control and Research


Professional Experience

  • 2015-present
    Assistant Professor, Department of Medicine, University of California, San Francisco, CA

Honors & Awards

  • 2003-2006
    Academic Gold Medal, Livingstone College
  • 2006
    Summer Bridge Fellow, University of Georgia
  • 2012
    Society for Research on Nicotine and Tobacco Travel Award
  • 2012
    Centers for Disease Control and Prevention (CDC) Top-Ten Research Article

Selected Publications

  1. St Helen G, Liakoni E, Nardone N, Addo N, Jacob P, Benowitz NL. Comparison of systemic exposure to toxic and/or carcinogenic volatile organic compounds (VOCs) during vaping, smoking, and abstention. Cancer Prev Res (Phila). 2019 Sep 25.
    View on PubMed
  2. St Helen G, Benowitz NL, Ko J, Jacob P, Gregorich SE, Pérez-Stable EJ, Murphy SE, Hecht SS, Hatsukami DK, Donny EC. Differences in exposure to toxic and/or carcinogenic volatile organic compounds between Black and White cigarette smokers. J Expo Sci Environ Epidemiol. 2019 Aug 12.
    View on PubMed
  3. St Helen G, Benowitz NL, Ahluwalia JS, Tyndale RF, Addo N, Gregorich SE, Pérez-Stable EJ, Cox LS. Black Light Smokers: How Nicotine Intake and Carcinogen Exposure Differ Across Various Biobehavioral Factors. J Natl Med Assoc. 2019 May 10.
    View on PubMed
  4. Liakoni E, Edwards KC, St Helen G, Nardone N, Dempsey DA, Tyndale RF, Benowitz NL. Effects of Nicotine Metabolic Rate on Withdrawal Symptoms and Response to Cigarette Smoking After Abstinence. Clin Pharmacol Ther. 2019 Mar; 105(3):641-651.
    View on PubMed
  5. Elias J, Dutra LM, St Helen G, Ling PM. Revolution or redux? Assessing IQOS through a precursor product. Tob Control. 2018 11; 27(Suppl 1):s102-s110.
    View on PubMed
  6. St Helen G, Jacob Iii P, Nardone N, Benowitz NL. IQOS: examination of Philip Morris International's claim of reduced exposure. Tob Control. 2018 11; 27(Suppl 1):s30-s36.
    View on PubMed
  7. St Helen G, Eaton DL. Public Health Consequences of e-Cigarette Use. JAMA Intern Med. 2018 07 01; 178(7):984-986.
    View on PubMed
  8. St Helen G, Shahid M, Chu S, Benowitz NL. Impact of e-liquid flavors on e-cigarette vaping behavior. Drug Alcohol Depend. 2018 Aug 01; 189:42-48.
    View on PubMed
  9. Benowitz NL, Nardone N, Jain S, Dempsey DA, Addo N, St Helen G, Jacob P. Comparison of Urine 4-(Methylnitrosamino)-1-(3)Pyridyl-1-Butanol and Cotinine for Assessment of Active and Passive Smoke Exposure in Urban Adolescents. Cancer Epidemiol Biomarkers Prev. 2018 03; 27(3):254-261.
    View on PubMed
  10. Velicer C, St Helen G, Glantz SA. Tobacco papers and tobacco industry ties in regulatory toxicology and pharmacology. J Public Health Policy. 2018 Feb; 39(1):34-48.
    View on PubMed
  11. Havel CM, Benowitz NL, Jacob P, St Helen G. An Electronic Cigarette Vaping Machine for the Characterization of Aerosol Delivery and Composition. Nicotine Tob Res. 2017 Oct 01; 19(10):1224-1231.
    View on PubMed
  12. Benowitz NL, Jain S, Dempsey DA, Nardone N, Helen GS, Jacob P. Urine Cotinine Screening Detects Nearly Ubiquitous Tobacco Smoke Exposure in Urban Adolescents. Nicotine Tob Res. 2017 Sep 01; 19(9):1048-1054.
    View on PubMed
  13. St Helen G, Dempsey DA, Havel CM, Jacob P, Benowitz NL. Impact of e-liquid flavors on nicotine intake and pharmacology of e-cigarettes. Drug Alcohol Depend. 2017 09 01; 178:391-398.
    View on PubMed
  14. Schick SF, Blount BC, Jacob P, Saliba NA, Bernert JT, El Hellani A, Jatlow P, Pappas RS, Wang L, Foulds J, Ghosh A, Hecht SS, Gomez JC, Martin JR, Mesaros C, Srivastava S, St Helen G, Tarran R, Lorkiewicz PK, Blair IA, Kimmel HL, Doerschuk CM, Benowitz NL, Bhatnagar A. Biomarkers of exposure to new and emerging tobacco delivery products. Am J Physiol Lung Cell Mol Physiol. 2017 Sep 01; 313(3):L425-L452.
    View on PubMed
  15. Taghavi T, St Helen G, Benowitz NL, Tyndale RF. Effect of UGT2B10, UGT2B17, FMO3, and OCT2 genetic variation on nicotine and cotinine pharmacokinetics and smoking in African Americans. Pharmacogenet Genomics. 2017 04; 27(4):143-154.
    View on PubMed
  16. St Helen G, Ross KC, Dempsey DA, Havel CM, Jacob P, Benowitz NL. Nicotine Delivery and Vaping Behavior During ad Libitum E-cigarette Access. Tob Regul Sci. 2016 Oct; 2(4):363-376.
    View on PubMed
  17. Benowitz NL, St Helen G, Dempsey DA, Jacob P, Tyndale RF. Disposition kinetics and metabolism of nicotine and cotinine in African American smokers: impact of CYP2A6 genetic variation and enzymatic activity. Pharmacogenet Genomics. 2016 07; 26(7):340-50.
    View on PubMed
  18. Ross KC, Dempsey DA, St Helen G, Delucchi K, Benowitz NL. The Influence of Puff Characteristics, Nicotine Dependence, and Rate of Nicotine Metabolism on Daily Nicotine Exposure in African American Smokers. Cancer Epidemiol Biomarkers Prev. 2016 06; 25(6):936-43.
    View on PubMed
  19. St Helen G, Havel C, Dempsey DA, Jacob P, Benowitz NL. Nicotine delivery, retention and pharmacokinetics from various electronic cigarettes. Addiction. 2016 Mar; 111(3):535-44.
    View on PubMed
  20. St Helen G, Aguilar-Villalobos M, Adetona O, Cassidy B, Bayer CW, Hendry R, Hall DB, Naeher LP. Exposure of pregnant women to cookstove-related household air pollution in urban and periurban Trujillo, Peru. Arch Environ Occup Health. 2015; 70(1):10-8.
    View on PubMed

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