{
  "id": 10480529,
  "title": "Multiomic Profiling Links RDH12-Dependent Retinaldehyde Detoxification to Membrane Remodeling and Ferroptosis",
  "url": "https://urgent.news/2026/09/28/multiomic-profiling-links-rdh12-dependent-retinaldehyde",
  "topic": "science",
  "section": "Science",
  "published": "2026-09-28T00:00:00.000Z",
  "source": {
    "name": "bioRxiv",
    "slug": "biorxiv",
    "url": "https://www.biorxiv.org/content/10.64898/2026.09.24.754135v1?rss=1"
  },
  "original_language": "en",
  "account": "Retinaldehyde (atRAL) is a reactive compound produced during visual pigment restoration, and its breakdown is crucial for preventing oxidative stress and retinal damage. Retinol dehydrogenase 12 (RDH12) reduces atRAL into retinol, but the relationship between its enzymatic activity and cellular stress responses is unclear. Researchers utilized stable HEK293T cells expressing RDH12 to correlate proteomic and lipidomic profiles and assessed cell survival to reveal the shift from immediate atRAL toxicity to recovery. Expressing RDH12 bolstered the cell's resistance to retinaldehyde-induced harm. When atRAL was introduced, the KEAP1-NRF2 pathway, responsible for safeguarding cells, was activated, boosting the expression of HMOX1, SLC7A11, GCLC, MGST2, and MGST3. Conversely, the final glutathione peroxidase arm diminished. This early exposure also induced changes in the cell membrane, including elevated levels of glycerophospholipid enzymes, stress-related ceramides, and lysophosphatidylcholines. Simultaneously, the presence of transferrin receptor (TFRC) and SLC11A2 was heightened, which regulate iron distribution within cells and initiate Fenton chemistry, contributing to oxidative stress. As the cells began to recover, those expressing RDH12 showed a different molecular state, marked by elevated levels of phosphatidylcholines (PCs) and ether-linked PCs, and alterations in the proteome linked to cytoskeletal reorganization and antioxidant mechanisms. A pharmacological intervention with Ferrostatin-1 further demonstrated that atRAL-induced cell damage in RDH12-expressing cells relies, in part, on lipid radical propagation and lipid peroxidation, underscoring the role of ferroptosis in cell death. Overall, these multiomics and biological insights reveal a unique timeline for retinaldehyde toxicity, suggesting that RDH12 plays a crucial role in initial metabolic defense against immediate aldehyde clearance, late-stage lipid detoxification, and adaptive changes in membrane lipid homeostasis.",
  "summary": "All-trans-retinal (atRAL) is a photoreactive aldehyde generated during visual pigment regeneration, and impaired atRAL clearance contributes to oxidative stress and retinal degeneration. Retinol dehydrogenase 12 (RDH12) reduces atRAL to all-trans-retinol, yet the temporal mechanisms linking its upstream enzymatic activity to downstream cellular stress adaptations remain poorly defined. Here, we…",
  "key_points": [],
  "editors_take": null,
  "illustration": null,
  "coverage": {
    "outlets": 1,
    "also_reported_by": []
  },
  "ai_generated": true,
  "disclaimer": "Summaries, key points and the editor’s take are written by software from other outlets’ reporting and may contain errors — always check the linked original."
}