Short-term early exposure to thirdhand cigarette smoke increases lung cancer incidence in mice
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Shandong Univ., Weihai, SD (China)
- Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States); Nanjing Univ. Medical School, Jiangsu (China)
- Univ. of California, San Francisco, CA (United States)
- Indoor Environment Group, Energy Technologies Area, Lawrence Berkeley National Laboratory, Berkeley, CA 94720, U.S.A.
- State Key Laboratory of Reproductive Medicine, Institute of Toxicology, Nanjing Medical University, Nanjing 211166, China
- Department of Pathology and Laboratory Medicine, University of California Davis Medical Center, Sacramento, CA 95817, U.S.A.
Exposure to thirdhand smoke (THS) is a recently described health concern that arises in many indoor environments. However, the carcinogenic potential of THS, a critical consideration in risk assessment, remains untested. Here we investigated the effects of short-term early exposure to THS on lung carcinogenesis in A/J mice. Forty weeks after THS exposure from 4 to 7 weeks of age, the mice had increased incidence of lung adenocarcinoma, tumor size and, multiplicity, compared with controls. In vitro studies using cultured human lung cancer cells showed that THS exposure induced DNA double-strand breaks and increased cell proliferation and colony formation. RNA sequencing analysis revealed that THS exposure induced endoplasmic reticulum stress and activated p53 signaling. Activation of the p53 pathway was confirmed by an increase in its targets p21 and BAX. These data indicate that early exposure to THS is associated with increased lung cancer risk.
- Research Organization:
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Sponsoring Organization:
- University of California Tobacco-Related Disease Research Program (TRDRP); USDOE Laboratory Directed Research and Development (LDRD) Program; National Institute on Drug Abuse (NIDA); National Center for Research Resources; China Postdoctoral International Exchange Program 2015; National Natural Science Foundation of China (NSFC); Postdoctoral Science Foundation of China
- Grant/Contract Number:
- AC02-05CH11231; 24RT-0038; 23PT-0013; P30 DA012393; S10 RR026437; 81402193
- OSTI ID:
- 1624993
- Journal Information:
- Clinical Science (1979), Vol. 132, Issue 4; ISSN 0143-5221
- Publisher:
- Portland PressCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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