Targeting Reactive Aldehyde Detoxification by Aldehyde Dehydrogenase 2 (ALDH2) as a Treatment Strategy for Endometriosis

Stacy L. McAllister, Pritam Sinharoy, Megana Vasu
In: bioRxiv · 2020 · doi:10.1101/2020.01.30.927376 · W3003268713
preprint OA: green CC0
📄 Open PDF View on OpenAlex View at publisher
⚙ AI-generated summary by claude@2026-06, 2026-06-10 ⓘ

Reduced ALDH2 activity in endometriosis leads to increased reactive aldehydes and pain, which can be alleviated by ALDH2 activation with Alda-1 in a rodent model.

One-sentence paraphrase of the abstract; not a substitute for reading it. No clinical advice. How this works

Abstract

Abstract Endometriosis affects ∼176 million women worldwide, yet on average, women experience pain ∼10 years from symptom onset before being properly diagnosed. Standard treatments (drugs or surgery) often fail to provide long-term pain relief. Elevated levels of reactive aldehydes such as 4-hydroxynonenal (4-HNE) have been implicated in the peritoneal fluid of women with endometriosis and upon accumulation, reactive aldehydes can form protein-adducts and/or generate pain. A key enzyme in detoxifying reactive aldehydes to less reactive forms, is the mitochondrial enzyme aldehyde dehydrogenase-2 (ALDH2). Here, we tested the hypothesis that aberrant reactive aldehyde detoxification by ALDH2, underlies endometriosis and its associated pain. We determined, in the eutopic and ectopic endometrium of women with severe (stage IV) peritoneal endometriosis, that ALDH2 enzyme activity was decreased, which was associated with decreased ALDH2 expression and increased 4-HNE adduct formation compared to the eutopic endometrium of controls in the proliferative phase. Using a rodent model of endometriosis and an ALDH2*2 knock-in mouse with decreased ALDH2 activity, we determined that increasing ALDH2 activity with the enzyme activator Alda-1 could prevent endometriosis lesion development as well as alleviate pain-associated behaviors in proestrus. Overall, our findings suggest that targeting the ALDH2 enzyme in endometriosis may lead to better treatment strategies and in the proliferative phase, that increased 4-HNE adduct formation within the endometrium may serve as a less invasive diagnostic biomarker to reduce years of suffering in women. One Sentence Summary ALDH2 activity influences endometriosis and its associated pain.

My notes (saved in your browser only)

Condition tags

endometriosis

Citation neighborhood

Papers in the corpus that this work cites (lower rings, blue) and that cite this one (upper rings, green). Dot size scales with the paper's in-corpus citation count — bigger dot = more influential within the endo/adeno field. Click a dot to open that paper. [ expand to 2 hops ] — adds papers reached through this work's immediate citers/citees. Heavier; up to 60 extra dots.

References (59)

Source provenance

europepmc
last seen: 2026-06-04T01:45:00.660873+00:00
openalex
last seen: 2026-06-10T17:14:06.276822+00:00
License: CC0 · commercial use OK