13,14-dihydro Prostaglandin F2α (13,14-dihydro PGF2α) is the analog of PGF2α which has no unsaturation in the lower side chain. It causes luteolysis in hamsters with a potency five times higher than PGF2α. The ED50 value for 13,14-dihydro PGF2α as a luteolytic agent in hamsters is 1.5 µg 100 g.[1]
8,12-iso-iPF2α-VI, an isoprostane, arises from non-enzymatic, free radical-induced peroxidation of membrane lipids. It is the predominant isoprostane formed during lipid peroxidation and serves as a biomarker for oxidative stress. Detectable in hepatic tissue post CCl4-induced oxidative damage, 8,12-iso-iPF2α-VI levels are also elevated in the urine, blood, and cerebrospinal fluid of Alzheimer’s disease patients.
Δ17-6-keto Prostaglandin F1α (Δ17-6-keto PGF1α), a cyclooxygenase (COX) metabolite produced from eicosapentaenoic acid (EPA) in a variety of tissues including seminal vesicles, lungs, polymorphonuclear leukocytes, and ocular tissues, alongside other 3-series COX products from EPA such as PGF3α, PGE3, and thromboxane B3, is potentially linked to a lower occurrence of glaucoma in individuals consuming a marine-rich (EPA-rich) diet.
1a,1b-Dihomo Prostaglandin F2α (1a,1b-dihomo PGF2α), a hypothetical product of adrenic acid in the COX pathway, is predominantly synthesized in the renal medulla, reflecting the selective distribution of adrenic acid in this region.
Prostaglandin F2α (PGF2α) 1,9-lactone, a lipid-soluble internal ester of PGF2α, demonstrates resistance to hydrolysis by human plasma esterases, maintaining its structure even after 20 hours of incubation under physiological conditions. Unlike PGF2α, this compound exhibits minimal antifertility and vasoactivity.
11β-13,14-Dihydro-15-keto PGF2α, a PGD2 metabolite in the 15-hydroxy PGDH pathway, is formed in human males upon infusion or inhalation of tritiated PGD2, with peak plasma levels of both 11β-PGF2α and 11β-13,14-dihydro-15-keto PGF2α observed within 10 minutes. In human lung homogenates, PGD2 is metabolized firstly to 11β-PGF2α and subsequently to 11β-15-keto-PGF2α in the presence of NAD+, but not to 11β-13,14-dihydro-15-keto PGF2α. Conversely, guinea pig liver and kidney homogenates can metabolize PGD2 to 11β-13,14-dihydro-15-keto PGF2α via 11β-PGF2α, with both NAD+ and NADP+ being requisite for this conversion.