Related Experiment Videos
Selenoprotein deficiency accelerates prostate carcinogenesis in a transgenic model
Veda Diwadkar-Navsariwala1, Gail S Prins, Steven M Swanson
1Department of Human Nutrition, University of Illinois, Chicago, IL 60612, USA.
Summary
Selenium may prevent prostate cancer by regulating selenoproteins. Studies show reduced selenoprotein levels accelerate cancer progression in mice, suggesting these proteins are key to selenium
Area of Science:
- Biochemistry
- Oncology
- Molecular Biology
Background:
- Selenium is linked to reduced cancer incidence, particularly prostate cancer.
- The exact mechanism of selenium's anti-cancer effect is not fully understood.
- Selenoproteins, containing selenocysteine, are vital for cellular functions like antioxidant defense.
Purpose of the Study:
- To investigate if selenoprotein levels influence prostate cancer development independently of selenium intake.
- To explore the role of selenoproteins in carcinogenesis.
Main Methods:
- Development of a unique bigenic mouse model (i6A-/Tag) by crossing mice with reduced selenoprotein levels (i6A-) and mice with targeted prostate cancer development (C3(1)/Tag).
- Assessment of prostatic epithelial hyperplasia and nuclear atypia in bigenic mice and control WT/Tag mice.
Main Results:
- Selenoprotein-deficient mice (i6A-/Tag) showed accelerated progression of lesions associated with prostate cancer.
- This indicates a direct role for selenoproteins in cancer risk and development.
Conclusions:
- Selenoproteins are implicated in modulating prostate cancer risk and progression.
- Selenium might prevent cancer by influencing the levels of these crucial selenoproteins.