DNA damage induced by endogenous aldehydes: current state of knowledge

Area of Science:

• Biochemistry
• Molecular Biology
• Pathophysiology

Background:

• DNA damage is implicated in numerous diseases, including cancer, aging, and neurodegeneration.
• Endogenous reactive aldehydes, formed during oxidative stress and cellular processes, directly modify DNA, creating aldehyde-derived DNA adducts.
• Accumulation of unrepaired DNA damage from these adducts disrupts cellular homeostasis, contributing to disease phenotypes.

Purpose of the Study:

• To review current knowledge on DNA damage induced by endogenously produced reactive aldehydes.
• To explore the link between these aldehydes, DNA adducts, and human disease pathophysiology.
• To highlight the role of specific aldehydes such as 4-hydroxy-2-nonenal, malondialdehyde, acrolein, crotonaldehyde, and methylglyoxal.

Main Methods:

• Literature review of existing research on reactive aldehydes and DNA damage.
• Analysis of studies linking aldehyde-DNA adducts to various pathophysiological conditions.
• Synthesis of information on the mutagenic and carcinogenic effects of these aldehydes.

Main Results:

• Reactive aldehydes readily form DNA adducts, leading to DNA base modifications and promutagenic lesions.
• Elevated levels of aldehydes like malondialdehyde and methylglyoxal are associated with increased DNA damage.
• Persistent unrepaired DNA damage contributes significantly to disease development and progression.

Conclusions:

• Endogenously produced reactive aldehydes are significant contributors to DNA damage and human diseases.
• The formation and accumulation of aldehyde-derived DNA adducts play a critical role in disease pathophysiology.
• Further research into mitigating aldehyde-induced DNA damage may offer therapeutic strategies for associated diseases.