Citation: | Lulu Fan, Hao Wang, Shuai Ben, Yifei Cheng, Silu Chen, Zhutao Ding, Lingyan Zhao, Shuwei Li, Meilin Wang, Gong Cheng. Genetic variant in a BaP-activated super-enhancer increases prostate cancer risk by promoting AhR-mediated FAM227A expression[J]. The Journal of Biomedical Research, 2024, 38(2): 149-162. DOI: 10.7555/JBR.37.20230049 |
Genetic variants in super-enhancers (SEs) are increasingly implicated as a disease risk-driving mechanism. Previous studies have reported an associations between benzo[a]pyrene (BaP) exposure and some malignant tumor risk. Currently, it is unclear whether BaP is involved in the effect of genetic variants in SEs on prostate cancer risk, nor the associated intrinsic molecular mechanisms. In the current study, by using logistic regression analysis, we found that rs5750581T>C in 22q-SE was significantly associated with prostate cancer risk (odds ratio = 1.26, P = 7.61 × 10−5). We also have found that the rs6001092T>G, in a high linkage disequilibrium with rs5750581T>C (r2 = 0.98), is located in a regulatory aryl hydrocarbon receptor (AhR) motif and may interact with the FAM227A promoter in further bioinformatics analysis. We then performed a series of functional and BaP acute exposure experiments to assess biological function of the genetic variant and the target gene. Biologically, the rs6001092-G allele strengthened the transcription factor binding affinity to AhR, thereby upregulating FAM227A, especially upon exposure to BaP, which induced the malignant phenotypes of prostate cancer. The current study highlights that AhR acts as an environmental sensor of BaP and is involved in the SE-mediated prostate cancer risk, which may provide new insights into the etiology of prostate cancer associated with the inherited SE variants under environmental carcinogen stressors.
This work received no funding from any source.
We are grateful to all the people who helped us accomplish this project.
CLC number: R737.25, Document code: A
The authors reported no conflict of interests.
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