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Cancers after Chornobyl: From Epidemiology to Molecular Quantification
Dimitry Bazyka1, Natalya Gudzenko2, Iryna Dyagil2
1National Research Center for Radiation Medicine, 53 Melnikov str, Kyiv 04050, Ukraine. bazyka@yahoo.com.
Cancers
|September 5, 2019
Summary
Cancer incidence increased in Chornobyl cleanup workers, particularly thyroid cancer in males and breast cancer in females. Molecular studies revealed genetic mutations in leukemia patients post-exposure.
Area of Science:
- Radiation epidemiology
- Oncology
- Molecular biology
Background:
- The Chornobyl accident led to significant population exposure to radiation.
- Long-term health effects, especially cancer incidence, require ongoing monitoring in exposed cohorts.
Purpose of the Study:
- To analyze cancer incidence and mortality in Chornobyl-exposed populations.
- To investigate molecular changes associated with radiation-induced cancers.
Main Methods:
- Analysis of cancer incidence (1990-2016) in cleanup workers, evacuees, and general population.
- Epidemiological data combined with molecular analyses (gene expression, polymorphism, FISH, telomere length, micronuclei testing).
Main Results:
- Elevated rates of total solid cancers, leukemia, lymphoma, and thyroid cancer in male cleanup workers.
- Increased breast cancer incidence in female cleanup workers.
- Thyroid cancer SIR of 3.35 in male cleanup workers (1986-2012).
- Molecular analysis of chronic lymphocytic leukemia (CLL) showed increased mutations in telomere maintenance genes.
Conclusions:
- Chornobyl cleanup workers exhibit increased cancer risks, with specific trends for different cancer types and sexes.
- Molecular alterations, particularly in telomere maintenance, are associated with radiation-related leukemia.
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