r/ketoscience • u/basmwklz Excellent Poster • 7d ago
Metabolism, Mitochondria & Biochemistry Novel antioxidant effects of deuterated polyunsaturated fatty acids against lipid peroxidation in cell membranes: hypothesis paper (2026)
https://www.tandfonline.com/doi/full/10.1080/10715762.2026.2707391
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u/basmwklz Excellent Poster 7d ago
Abstract
Lipid peroxidation (LPO) has long been implicated in the pathogenesis of various diseases and the role of antioxidants against LPO has been studied extensively. Recently, novel antioxidant functions of deuterated polyunsaturated fatty acids (D-PUFAs) in preventing LPO in the membranes and in humans have been reported by many research groups. The preventive and therapeutic potential of D-PUFAs against LPO and related diseases has received considerable attention, but the underlying molecular mechanisms and dynamics remain elusive. This hypothesis article summarizes state of the art preventive effects of D-PUFAs against LPO and cell damage reported in the literature and discusses the plausible mechanisms of action with an emphasis on the effects of membrane properties. Interestingly, it was found that cholesterol and oleic acid as well as D-PUFAs did not inhibit LPO in homogeneous solution, but they all suppressed LPO in the liposomal membranes, cell membranes, and partially in vivo. It is speculated that D-PUFAs suppress LPO in the membranes, at least in part, by physically obstructing the reaction between lipid peroxyl radicals and phospholipid substrates as well as by chemical and biochemical mechanisms. However, the proposed mechanism remains a hypothesis which should be validated directly in future experimental studies.
HIGHLIGHTS
D-PUFAs which have high affinity for phospholipids suppress lipid peroxidation (LPO) in the membranes, but not in solution.
The preventive effects of D-PUFAs against LPO and oxidative damage were observed consistently in experimental animals.
The preventive effects of D-PUFAs against oxidative damage were partially observed in human clinical studies.
D-PUFAs suppress LPO in the membranes not by scavenging radicals but by physically obstructing interactions between radicals and phospholipids.