{"type": "root", "children": [{"type": "p", "children": [{"type": "t", "text": "\n Aldehyde dehydrogenase‐2 (ALDH2) is a mitochondrial enzyme that plays a pivotal role in cellular detoxification by catalyzing the oxidation of reactive aldehydes generated both endogenously—such as lipid peroxidation by‐products—and exogenously, most notably acetaldehyde produced during ethanol metabolism. Proper ALDH2 activity protects cells from aldehyde‐induced DNA damage, protein adduct formation, and mitochondrial dysfunction, thereby mitigating risks for a broad spectrum of pathologies including cardiovascular disease, neurodegeneration, and various cancers (for instance, esophageal and liver cancers)."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "1", "end_ref": "3"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n A common inactivating mutation—often referred to as ALDH2*2—leads to markedly reduced enzyme activity. Carriers of this variant accumulate toxic acetaldehyde upon alcohol ingestion, which not only produces the well‐recognized flushing reaction and altered drinking behavior but also predisposes these individuals to heightened oxidative stress and tissue damage. This genetic deficiency has been epidemiologically linked to an increased propensity for alcohol‐related disorders, including higher risks of esophageal cancer, abnormal cardiovascular responses, and altered responses to pharmacological agents such as nitroglycerin."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "4", "end_ref": "6"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n Experimental studies have further elucidated that ALDH2 dysfunction leads to increased aldehyde‐mediated cellular injury. In settings such as Fanconi anemia and alcoholic cardiomyopathy, inadequate ALDH2 activity results in enhanced aldehyde-induced genotoxicity, mitochondrial damage, and aberrant stress signaling—all of which contribute to disease progression. Notably, pharmacological activation of ALDH2 using small molecules (for example, Alda-1) has been shown to restore enzyme activity and ameliorate tissue injury in preclinical models, highlighting the therapeutic potential of targeting ALDH2 in chronic disorders driven by aldehyde toxicity."}, {"type": "fg", "children": [{"type": "fg_fs", "start_ref": "7", "end_ref": "9"}]}, {"type": "t", "text": ""}]}, {"type": "t", "text": "\n \n "}, {"type": "p", "children": [{"type": "t", "text": "\n In summary, ALDH2 functions as a critical health-promoting enzyme. By metabolizing both endogenous and exogenous aldehydes, it safeguards against oxidative damage and modulates key aspects of cardiovascular, metabolic, and oncologic pathology. These multifaceted protective roles underscore the importance of maintaining ALDH2 activity and the potential benefits of therapeutic strategies that restore or enhance its function in populations at risk for aldehyde-related diseases.\n "}]}, {"type": "rg", "children": [{"type": "r", "ref": 1, "children": [{"type": "t", "text": "Che-Hong Chen, Julio Cesar Batista Ferreira, Eric R Gross, et al. 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