Benzo[a]pyrene

Benzo[a]pyrene shows lung carcinogenicity in animal models, and it is frequently used in chemoprevention studies. In Vivo: Note:
Please do not refer to only one article to determine the experimental conditions. It is recommended to determine the optimal experimental conditions (animal strain, age, dosage, frequency and cycle, detection time and indicators, etc.) through preliminary experiments before the formal experiment.

Benzo[a]pyrene (B[a]P) can be used to create lung tumor models. The bioavailability of Benzo[a]pyrene in rats is 10%, with a half-life of 16.6 hours. In female A/J mice, compared to the vehicle group, the 1.0 mg Benzo[a]pyrene treatment group shows statistically significant differences at 7 weeks, indicating that Benzo[a]pyrene-induced lung tumorigenesis is dose-dependent. The incidence of hyperplasia in female mice treated with 0.25, 0.50, and 1.0 mg Benzo[a]pyrene is significantly higher than in the vehicle group, and the adenoma incidence in the 1.0 mg Benzo[a]pyrene group is also significantly increased. Additionally, the multiplicity of hyperplasia in the 0.50 or 1.0 mg Benzo[a]pyrene treatment groups and the multiplicity of adenomas in the 1.0 mg group are significantly higher than in the vehicle group. Benzo[a]pyrene significantly increases the incidence of hyperplasia and adenomas in female A/J mice in a dose-dependent manner. On average, Benzo[a]pyrene induces the formation of 9.38±1.75 tumors, with an average tumor burden of 19.53±3.81 mm³. Administration of Benzo[a]pyrene also significantly decreases the levels of cAMP in the tumor and surrounding lung tissue and increases the expression levels of the PDE4D gene^[1][2].