2011
DOI: 10.1016/j.cbi.2011.01.018
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The role of aldehyde reductase AKR1A1 in the metabolism of gamma-hydroxybutyrate in 1321N1 human astrocytoma cells

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Cited by 10 publications
(7 citation statements)
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“…The data in this study support the notion that AKR1A1 is equivalent to this high Km aldehyde reductase, as silencing AKR1A1 did not have an impact on SSA reductase activity at endogenous (10 mM) concentration of SSA. These results agree with our previous results using an astroglial cell line, in which we demonstrated that AKR1A1 does not participate in the endogenous synthesis of GHB [40]. Previously, AKR7A2, another enzyme from the AKR superfamily, that has a lower Km for SSA [19], was demonstrated to be the dominant SSA reductase in the neuroblastoma cell line (SH-SY5Y) when concentrations of SSA are between 10 mM and 1 mM [33].…”
Section: Discussionsupporting
confidence: 94%
“…The data in this study support the notion that AKR1A1 is equivalent to this high Km aldehyde reductase, as silencing AKR1A1 did not have an impact on SSA reductase activity at endogenous (10 mM) concentration of SSA. These results agree with our previous results using an astroglial cell line, in which we demonstrated that AKR1A1 does not participate in the endogenous synthesis of GHB [40]. Previously, AKR7A2, another enzyme from the AKR superfamily, that has a lower Km for SSA [19], was demonstrated to be the dominant SSA reductase in the neuroblastoma cell line (SH-SY5Y) when concentrations of SSA are between 10 mM and 1 mM [33].…”
Section: Discussionsupporting
confidence: 94%
“…AKR1A1 has a role in ascorbic acid synthesis in rodents 7 and activity against gamma-hydroxybutyric acid (GHB)-related aldehydes in vitro 24 . But humans do not synthesize ascorbic acid, and AKR1A1 does not regulate GHB in vivo (Extended data Fig.7g) 25 . Therefore, the primary function of AKR1A1 had been a mystery 26 .…”
Section: Mainmentioning
confidence: 99%
“…Activating the GABA shunt in the gerbil brain has been shown to protect against ischemic/reperfusion injury, a known generator of oxidative stress [59]. SSA may also be reduced to gammahydroxybutyrate (GHB) by the actions of an NADPH dependent aldehyde reductase, AKR7A2, although in the normal rat brain less than 0.15% of the metabolic flux from GABA takes this reductive pathway [18,60]. Levels of GHB are very low in whole adult rat brain, in the 2 nmol/gm range, and in the 13 nmol/gm range in postmortem human frontal cortex [61].…”
Section: Gaba Shuntmentioning
confidence: 99%