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DNA Double-Strand Break Induction via High-Linear Energy Transfer Alpha Emission (DSB Induction (High-LET Alpha))
- Target
- DSB Induction (High-LET Alpha)
- Molecular classification
- DNA Damage, Radiation Physics
01
Overview
DNA double-strand break (DSB) induction via high-linear energy transfer (LET) alpha emission refers to the process by which alpha particles—highly ionizing, heavy charged particles—deposit dense energy along their path through biological tissue, causing clustered and complex DNA damage, particularly DSBs. This mechanism is central to both the biological effects of certain types of radiation exposure and targeted cancer therapies using alpha-emitting radionuclides.
- Other names
- Alpha particle-induced DNA damageHigh-LET radiation-induced DSBsAlpha emission radiotherapy mechanism
02
Mechanism of action
Direct induction of clustered DNA double-strand breaks through dense ionization tracks caused by alpha particle emission.
03
Biological functions
DNA damage inductionCell cycle arrestApoptosis inductionSenescence induction
04
Disease associations
Cancer (therapy)Radiation toxicity
05
Safety considerations
Off-target radiation damageToxicity to healthy tissuesPotential for secondary malignancies
06
Interacting drugs
Alpha-emitting radionuclides (e.g., Radium-223, Actinium-225)
1 more in the full profile.
07
Biomarkers
γH2AX (marker of DSBs)53BP1 (marker of DSBs)Cell cycle checkpoint activation (e.g., p53, ATM)
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