ALDH2

Class

Aldehyde dehydrogenase 2 activator

Aldehyde dehydrogenase 2 (ALDH2) is a mitochondrial enzyme that converts reactive aldehydes, including acetaldehyde generated from alcohol metabolism and lipid-peroxidation byproducts such as 4-hydroxynonenal, into far less reactive carboxylic acids. These aldehydes are chemically promiscuous and can damage proteins, lipids, and DNA if they accumulate. A common genetic variant of ALDH2, found at high frequency in some East Asian populations, produces an enzyme with markedly reduced catalytic activity, leaving carriers with poor aldehyde clearance, the well-known facial flushing response to alcohol, and epidemiological links to elevated cardiovascular risk. Because ALDH2 activity also declines with oxidative stress in conditions such as myocardial ischemia, heart failure, and neurodegeneration, restoring or boosting its catalytic function is a rationale pursued independent of genotype. An ALDH2 activator is a small molecule designed to increase the enzyme's turnover of toxic aldehydes, thereby reducing a source of cellular damage that accumulates during oxidative stress. This mechanism is being explored broadly across cardiovascular disease, alcohol-related pathology, and other settings where aldehyde-driven tissue injury contributes to disease progression, rather than being confined to a single indication.