Adaptaquin - CAS 385786-48-1
Category: Inhibitor
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HIF/HIF Prolyl-Hydroxylase
Adaptaquin is an inhibitor of hypoxia-inducible factor (HIF) prolyl hydroxylase 2 (PHD2) with IC50 value of 2 μM in a reporter assay using SH-SY5Y-ODD-Luc cells. It displays neuroprotective effects and enhances functional recovery in rodent intracerebral hemorrhage models by inhibition of ATF4 dependent genes. It reduces neuronal death and behavioral deficits after intracerebral hemorrhage (ICH) in several rodent models. It blocks glutamate induced ROS production in HT-22 cells, independent of MnSOD. It stabilizes HIF-1α protein and induces expression of the HIF1-regulated genes EPO and VEGF in SH-SY5Y human neuroblastoma cells. It is used in ischemic injury research, renal anemia, and used as an antioxidant. It is also used in pyruvate dehydrogenase (PDH) related research.
≥97% by HPLC
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1.Therapeutic targeting of oxygen-sensing prolyl hydroxylases abrogates ATF4-dependent neuronal death and improves outcomes after brain hemorrhage in several rodent models.
Karuppagounder SS;Alim I;Khim SJ;Bourassa MW;Sleiman SF;John R;Thinnes CC;Yeh TL;Demetriades M;Neitemeier S;Cruz D;Gazaryan I;Killilea DW;Morgenstern L;Xi G;Keep RF;Schallert T;Tappero RV;Zhong J;Cho S;Maxfield FR;Holman TR;Culmsee C;Fong GH;Su Y;Ming GL;Song H;Cave JW;Schofield CJ;Colbourne F;Coppola G;Ratan RR Sci Transl Med. 2016 Mar 2;8(328):328ra29. doi: 10.1126/scitranslmed.aac6008.
Disability or death due to intracerebral hemorrhage (ICH) is attributed to blood lysis, liberation of iron, and consequent oxidative stress. Iron chelators bind to free iron and prevent neuronal death induced by oxidative stress and disability due to ICH, but the mechanisms for this effect remain unclear. We show that the hypoxia-inducible factor prolyl hydroxylase domain (HIF-PHD) family of iron-dependent, oxygen-sensing enzymes are effectors of iron chelation. Molecular reduction of the three HIF-PHD enzyme isoforms in the mouse striatum improved functional recovery after ICH. A low-molecular-weight hydroxyquinoline inhibitor of the HIF-PHD enzymes, adaptaquin, reduced neuronal death and behavioral deficits after ICH in several rodent models without affecting total iron or zinc distribution in the brain. Unexpectedly, protection from oxidative death in vitro or from ICH in vivo by adaptaquin was associated with suppression of activity of the prodeath factor ATF4 rather than activation of an HIF-dependent prosurvival pathway. Together, these findings demonstrate that brain-specific inactivation of the HIF-PHD metalloenzymes with the blood-brain barrier-permeable inhibitor adaptaquin can improve functional outcomes after ICH in several rodent models.
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CAS 385786-48-1 Adaptaquin

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