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Spots Global Cancer Trial Database for Are Smokers Switching to Vaping at Lower Risk for Cancer? (Electronic Cigarettes and Cancer Risk)

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Trial Identification

Brief Title: Are Smokers Switching to Vaping at Lower Risk for Cancer? (Electronic Cigarettes and Cancer Risk)

Official Title: Are Smokers Switching to Vaping at Lower Risk for Cancer?

Study ID: NCT03750825

Study Description

Brief Summary: This project will address a growing public health concern, namely, the health risks or benefits of e-cig use relative to cigarette smoking. The investigators will use biomarkers of early effects of relevance to cancer to determine the carcinogenic potential of e-cig use relative to cigarette smoking in oral epithelium, which is a target tissue for smoking-associated cancer. The study population will consist of one group of smokers who are interested in switching to e-cig use (Grp 1), one group of smokers who do not intend to change their smoking habits (Grp 2), and one group of non-users who would like to maintain their nonsmoking non-vaping status (Grp 3); The total number of participants in this project is 150 (n = 50, each group). The investigators will use an integrative 'multi-omics' approach complemented with single-locus/gene validation analyses to detect temporal changes in the genome, epigenome, and transcriptome relevant to cancer in the oral cells of the participants as the intervention progresses.

Detailed Description: Electronic cigarettes (e-cig) are increasingly popular among adult smokers and adolescent never smokers. Chemical analyses of e-cig vapor and liquid have shown the presence of many of the same carcinogens as those found in cigarette smoke, albeit in generally lower concentrations. However, the carcinogenic potential of e-cig has not been investigated in e-cig users (otherwise known as 'vapers'). The investigators will investigate the cancer-causing potential of e-cig use as compared to cigarette smoking by quantifying molecular changes linked to risk of cancer in smokers who switch to e-cig use vs. those who maintain their smoking habits. Leveraging a source population for ongoing studies on e-cig, the investigators will recruit smokers who are interested in switching to e-cig use, and two control groups of non-vapers, including smokers and nonsmokers who do not intend to change their smoking and nonsmoking status, respectively (n = 50, each group). Smokers consenting to switch completely to e-cig will be assigned to a 3-month intervention with a standard e-cig with fully described product characteristics. Control groups will maintain their smoking/nonsmoking habits during the intervention. At weekly intervals, the investigators will verify participants' compliance through personal interviews, CO breath tests, cotinine quantification, and vaping/smoking topography measurements. The investigators will use a non-invasive brushing technique to collect oral cells from the inside of the cheeks of all participants at baseline and every 2 weeks, afterwards. The investigators will use an integrative 'multi-omics' approach complemented with single-locus/gene validation analyses to detect temporal changes in the genome, epigenome, and transcriptome relevant to cancer in the oral cells of the participants as the intervention progresses.

Eligibility

Minimum Age: 22 Years

Eligible Ages: ADULT

Sex: ALL

Healthy Volunteers: Yes

Locations

University of Southern California, Health Sciences Campus, Los Angeles, California, United States

Contact Details

Name: Ahmad Besaratinia

Affiliation: University of Southern California

Role: PRINCIPAL_INVESTIGATOR

Useful links and downloads for this trial

Clinicaltrials.gov

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