PMID-sentid Pub_year Sent_text comp_official_name comp_offset protein_name organism prot_offset 32196080-5 2020 We further show that NNT loss elicits mitochondrial dysfunction independent of substantial increases in oxidative stress, but rather marked by the diminished activities of proteins dependent on resident iron-sulfur clusters. Iron 203-207 nicotinamide nucleotide transhydrogenase Mus musculus 21-24 34043997-4 2021 Further comparisons between SMM from both Nnt mouse genotypes revealed that the NADPH supplied by NNT supports up to 600 pmol/mg/min of H2O2 removal under selected conditions. Hydrogen Peroxide 136-140 nicotinamide nucleotide transhydrogenase Mus musculus 98-101 34043997-5 2021 Surprisingly, SMM from Nnt-/- mice removed exogenous H2O2 at wild-type levels and exhibited a maintained or even decreased net emission of endogenous H2O2 when substrates that support Krebs cycle reactions were present (e.g., pyruvate plus malate or palmitoylcarnitine plus malate). Hydrogen Peroxide 53-57 nicotinamide nucleotide transhydrogenase Mus musculus 23-26 34043997-5 2021 Surprisingly, SMM from Nnt-/- mice removed exogenous H2O2 at wild-type levels and exhibited a maintained or even decreased net emission of endogenous H2O2 when substrates that support Krebs cycle reactions were present (e.g., pyruvate plus malate or palmitoylcarnitine plus malate). Hydrogen Peroxide 150-154 nicotinamide nucleotide transhydrogenase Mus musculus 23-26 34043997-5 2021 Surprisingly, SMM from Nnt-/- mice removed exogenous H2O2 at wild-type levels and exhibited a maintained or even decreased net emission of endogenous H2O2 when substrates that support Krebs cycle reactions were present (e.g., pyruvate plus malate or palmitoylcarnitine plus malate). krebs 184-189 nicotinamide nucleotide transhydrogenase Mus musculus 23-26 34043997-6 2021 These results may be explained by a compensation for the lack of NNT, since the total activities of concurrent NADP+-reducing enzymes (IDH2, malic enzymes and glutamate dehydrogenase) were ~70% elevated in Nnt-/- mice. NADP 111-116 nicotinamide nucleotide transhydrogenase Mus musculus 206-209 34043997-7 2021 Importantly, respiratory rates were similar between SMM from both Nnt genotypes despite differing NNT contributions to H2O2 removal and their implications for an evolving concept in the literature are discussed. Hydrogen Peroxide 119-123 nicotinamide nucleotide transhydrogenase Mus musculus 98-101 34043997-8 2021 We concluded that NNT is capable of meaningfully sustaining NADPH-dependent H2O2 removal in intact SMM. Hydrogen Peroxide 76-80 nicotinamide nucleotide transhydrogenase Mus musculus 18-21 34043997-9 2021 Nonetheless, if the available substrates favor non-NNT sources of NADPH, the H2O2 removal by SMM is maintained in Nnt-/- mice SMM. Hydrogen Peroxide 77-81 nicotinamide nucleotide transhydrogenase Mus musculus 114-117 32629517-6 2020 Both sexes of BC1 hybrids indicate that mice with Nnt wild type allele are highly sensitive to DIO and exhibit higher relative fat mass. 3,3'-Dioctadecyloxacarbocyanine perchlorate 95-98 nicotinamide nucleotide transhydrogenase Mus musculus 50-53 32629517-7 2020 In summary, our data indicate that the Nnt mutation in mice is associated with sensitivity to DIO and fat mass. 3,3'-Dioctadecyloxacarbocyanine perchlorate 94-97 nicotinamide nucleotide transhydrogenase Mus musculus 39-42 11513952-1 2001 Proton-pumping nicotinamide nucleotide transhydrogenase (Nnt) is a membrane-bound enzyme that catalyzes the reversible reduction of NADP(+) by NADH. NADP 132-136 nicotinamide nucleotide transhydrogenase Mus musculus 57-60 11513952-1 2001 Proton-pumping nicotinamide nucleotide transhydrogenase (Nnt) is a membrane-bound enzyme that catalyzes the reversible reduction of NADP(+) by NADH. NAD 143-147 nicotinamide nucleotide transhydrogenase Mus musculus 57-60 34043997-0 2021 NADPH supply and the contribution of NAD(P)+ transhydrogenase (NNT) to H2O2 balance in skeletal muscle mitochondria. Hydrogen Peroxide 71-75 nicotinamide nucleotide transhydrogenase Mus musculus 63-66 32196080-5 2020 We further show that NNT loss elicits mitochondrial dysfunction independent of substantial increases in oxidative stress, but rather marked by the diminished activities of proteins dependent on resident iron-sulfur clusters. Sulfur 208-214 nicotinamide nucleotide transhydrogenase Mus musculus 21-24 32196080-6 2020 These defects were associated with both NADPH availability and ROS accumulation, suggesting that NNT serves a specific role in mitigating the oxidation of these critical protein cofactors. NADP 40-45 nicotinamide nucleotide transhydrogenase Mus musculus 97-100 32196080-6 2020 These defects were associated with both NADPH availability and ROS accumulation, suggesting that NNT serves a specific role in mitigating the oxidation of these critical protein cofactors. ros 63-66 nicotinamide nucleotide transhydrogenase Mus musculus 97-100 31639438-1 2020 Here, we demonstrate that the upregulation of catalase is required to compensate for the loss of nicotinamide nucleotide transhydrogenase (NNT) to maintain hydrogen peroxide (H2O2) steady-state levels in C57BL/6J liver mitochondria. Hydrogen Peroxide 156-173 nicotinamide nucleotide transhydrogenase Mus musculus 97-137 31639438-1 2020 Here, we demonstrate that the upregulation of catalase is required to compensate for the loss of nicotinamide nucleotide transhydrogenase (NNT) to maintain hydrogen peroxide (H2O2) steady-state levels in C57BL/6J liver mitochondria. Hydrogen Peroxide 156-173 nicotinamide nucleotide transhydrogenase Mus musculus 139-142 31639438-1 2020 Here, we demonstrate that the upregulation of catalase is required to compensate for the loss of nicotinamide nucleotide transhydrogenase (NNT) to maintain hydrogen peroxide (H2O2) steady-state levels in C57BL/6J liver mitochondria. Water 175-179 nicotinamide nucleotide transhydrogenase Mus musculus 97-137 31639438-1 2020 Here, we demonstrate that the upregulation of catalase is required to compensate for the loss of nicotinamide nucleotide transhydrogenase (NNT) to maintain hydrogen peroxide (H2O2) steady-state levels in C57BL/6J liver mitochondria. Water 175-179 nicotinamide nucleotide transhydrogenase Mus musculus 139-142 31639438-2 2020 Our investigations using the closely related mouse strains C57BL/6NJ (6NJ; +NNT) and C57BL/6J (6J; -NNT) revealed that NNT is required for the provision of NADPH and that the upregulation of isocitrate dehydrogenase-2 (IDH2) activity is not enough to compensate for the absence of NNT, which is consistent with previous observations. NADP 156-161 nicotinamide nucleotide transhydrogenase Mus musculus 76-79 31639438-2 2020 Our investigations using the closely related mouse strains C57BL/6NJ (6NJ; +NNT) and C57BL/6J (6J; -NNT) revealed that NNT is required for the provision of NADPH and that the upregulation of isocitrate dehydrogenase-2 (IDH2) activity is not enough to compensate for the absence of NNT, which is consistent with previous observations. NADP 156-161 nicotinamide nucleotide transhydrogenase Mus musculus 100-103 31639438-2 2020 Our investigations using the closely related mouse strains C57BL/6NJ (6NJ; +NNT) and C57BL/6J (6J; -NNT) revealed that NNT is required for the provision of NADPH and that the upregulation of isocitrate dehydrogenase-2 (IDH2) activity is not enough to compensate for the absence of NNT, which is consistent with previous observations. NADP 156-161 nicotinamide nucleotide transhydrogenase Mus musculus 100-103 31639438-2 2020 Our investigations using the closely related mouse strains C57BL/6NJ (6NJ; +NNT) and C57BL/6J (6J; -NNT) revealed that NNT is required for the provision of NADPH and that the upregulation of isocitrate dehydrogenase-2 (IDH2) activity is not enough to compensate for the absence of NNT, which is consistent with previous observations. NADP 156-161 nicotinamide nucleotide transhydrogenase Mus musculus 100-103 28964917-2 2017 We hypothesized that a HFD would increase mitochondrial reliance on NAD(P)-transhydrogenase (NNT) as the source of NADPH for antioxidant systems that counteract NAFLD development. NADP 115-120 nicotinamide nucleotide transhydrogenase Mus musculus 93-96 31639438-4 2020 However, 6NJ mitochondria energized with succinate produced significantly less H2O2 (59.95 +- 2.13 pmol mg-1 min-1) when compared to samples from 6J mice (116.39 +- 20.74 pmol mg-1 min-1), an effect that was attributed to the presence of NNT. Succinates 41-50 nicotinamide nucleotide transhydrogenase Mus musculus 238-241 31639438-5 2020 Further investigations into the H2O2 eliminating capacities of these mitochondria led to the novel observation that 6J mitochondria compensate for the loss of NNT by upregulating catalase. Water 32-36 nicotinamide nucleotide transhydrogenase Mus musculus 159-162 31639438-6 2020 Indeed, 6NJ and 6J mitochondria energized with pyruvate or succinate displayed similar rates for H2O2 elimination, quenching ~84% and ~86% of the H2O2, respectively, in the surrounding medium within 30 s. However, inclusion of palmitoyl-CoA, an NNT inhibitor, significantly limited H2O2 degradation by 6NJ mitochondria only (~55% of H2O2 eliminated in 30 s). Pyruvates 47-55 nicotinamide nucleotide transhydrogenase Mus musculus 245-248 31639438-6 2020 Indeed, 6NJ and 6J mitochondria energized with pyruvate or succinate displayed similar rates for H2O2 elimination, quenching ~84% and ~86% of the H2O2, respectively, in the surrounding medium within 30 s. However, inclusion of palmitoyl-CoA, an NNT inhibitor, significantly limited H2O2 degradation by 6NJ mitochondria only (~55% of H2O2 eliminated in 30 s). Succinates 59-68 nicotinamide nucleotide transhydrogenase Mus musculus 245-248 31639438-13 2020 Collectively, our findings demonstrate for the first time that 6J liver mitochondria compensate for the loss of NNT by increasing catalase levels for the maintenance of H2O2 steady-state levels. Water 169-173 nicotinamide nucleotide transhydrogenase Mus musculus 112-115 30281804-1 2018 Among mitochondrial NADP-reducing enzymes, nicotinamide nucleotide transhydrogenase (NNT) establishes an elevated matrix NADPH/NADP+ by catalyzing the reduction of NADP+ at the expense of NADH oxidation coupled to inward proton translocation across the inner mitochondrial membrane. NADP 20-24 nicotinamide nucleotide transhydrogenase Mus musculus 85-88 30281804-1 2018 Among mitochondrial NADP-reducing enzymes, nicotinamide nucleotide transhydrogenase (NNT) establishes an elevated matrix NADPH/NADP+ by catalyzing the reduction of NADP+ at the expense of NADH oxidation coupled to inward proton translocation across the inner mitochondrial membrane. NADP 121-126 nicotinamide nucleotide transhydrogenase Mus musculus 85-88 30281804-1 2018 Among mitochondrial NADP-reducing enzymes, nicotinamide nucleotide transhydrogenase (NNT) establishes an elevated matrix NADPH/NADP+ by catalyzing the reduction of NADP+ at the expense of NADH oxidation coupled to inward proton translocation across the inner mitochondrial membrane. NADP 127-132 nicotinamide nucleotide transhydrogenase Mus musculus 85-88 30281804-1 2018 Among mitochondrial NADP-reducing enzymes, nicotinamide nucleotide transhydrogenase (NNT) establishes an elevated matrix NADPH/NADP+ by catalyzing the reduction of NADP+ at the expense of NADH oxidation coupled to inward proton translocation across the inner mitochondrial membrane. NADP 164-169 nicotinamide nucleotide transhydrogenase Mus musculus 85-88 30281804-1 2018 Among mitochondrial NADP-reducing enzymes, nicotinamide nucleotide transhydrogenase (NNT) establishes an elevated matrix NADPH/NADP+ by catalyzing the reduction of NADP+ at the expense of NADH oxidation coupled to inward proton translocation across the inner mitochondrial membrane. NAD 188-192 nicotinamide nucleotide transhydrogenase Mus musculus 85-88 30281804-3 2018 The absence of NNT activity resulted in lower total NADPH sources activity in the brain mitochondria of young mice, an effect that was partially compensated in aged mice. NADP 52-57 nicotinamide nucleotide transhydrogenase Mus musculus 15-18 30281804-5 2018 In the absence of NNT, an increased release of H2 O2 from mitochondria was observed when the metabolism of respiratory substrates occurred with restricted flux through relevant mitochondrial NADPH sources or when respiratory complex I was inhibited. Hydrogen Peroxide 47-52 nicotinamide nucleotide transhydrogenase Mus musculus 18-21 30281804-6 2018 In accordance, mitochondria from Nnt-/- brains were unable to sustain NADP in its reduced state when energized in the absence of carbon substrates, an effect aggravated after H2 O2 bolus metabolism. Hydrogen Peroxide 175-180 nicotinamide nucleotide transhydrogenase Mus musculus 33-36 30281804-7 2018 These data indicate that the lack of NNT in brain mitochondria impairs peroxide detoxification, but peroxide detoxification can be partially counterbalanced by concurrent NADPH sources depending on substrate availability. Peroxides 71-79 nicotinamide nucleotide transhydrogenase Mus musculus 37-40 29046340-2 2018 NNT produces high concentrations of NADPH for detoxification of reactive oxygen species by glutathione and thioredoxin pathways. NADP 36-41 nicotinamide nucleotide transhydrogenase Mus musculus 0-3 29046340-2 2018 NNT produces high concentrations of NADPH for detoxification of reactive oxygen species by glutathione and thioredoxin pathways. Reactive Oxygen Species 64-87 nicotinamide nucleotide transhydrogenase Mus musculus 0-3 29046340-2 2018 NNT produces high concentrations of NADPH for detoxification of reactive oxygen species by glutathione and thioredoxin pathways. Glutathione 91-102 nicotinamide nucleotide transhydrogenase Mus musculus 0-3 29046340-10 2018 Further, we demonstrated that both under expression or overexpression of NNT reduced corticosterone output implying a central role for it in the control of steroidogenesis. Corticosterone 85-99 nicotinamide nucleotide transhydrogenase Mus musculus 73-76 29455203-12 2018 CONCLUSION: These data indicate that loss of NNT increases vascular ROS production and exacerbates atherosclerotic plaque development. Reactive Oxygen Species 68-71 nicotinamide nucleotide transhydrogenase Mus musculus 45-48 28964917-4 2017 After 20 weeks on a HFD, Nnt-/- mice exhibited a higher prevalence of steatohepatitis and content of liver triglycerides compared to Nnt+/+ mice on an identical diet. Triglycerides 107-120 nicotinamide nucleotide transhydrogenase Mus musculus 25-28 28964917-5 2017 Under a HFD, the aggravated NAFLD phenotype in the Nnt-/- mice was accompanied by an increased H2O2 release rate from mitochondria, decreased aconitase activity (a redox-sensitive mitochondrial enzyme) and higher susceptibility to Ca2+-induced mitochondrial permeability transition. Hydrogen Peroxide 95-99 nicotinamide nucleotide transhydrogenase Mus musculus 51-54 28964917-6 2017 In addition, HFD led to the phosphorylation (inhibition) of pyruvate dehydrogenase (PDH) and markedly reduced the ability of liver mitochondria to remove peroxide in Nnt-/- mice. Peroxides 154-162 nicotinamide nucleotide transhydrogenase Mus musculus 166-169 28964917-7 2017 Bypass or pharmacological reactivation of PDH by dichloroacetate restored the peroxide removal capability of mitochondria from Nnt-/- mice on a HFD. Dichloroacetic Acid 49-64 nicotinamide nucleotide transhydrogenase Mus musculus 127-130 28964917-7 2017 Bypass or pharmacological reactivation of PDH by dichloroacetate restored the peroxide removal capability of mitochondria from Nnt-/- mice on a HFD. Peroxides 78-86 nicotinamide nucleotide transhydrogenase Mus musculus 127-130 28964917-9 2017 Therefore, HFD interacted with Nnt mutation to generate PDH inhibition and further suppression of peroxide removal. Peroxides 98-106 nicotinamide nucleotide transhydrogenase Mus musculus 31-34 28580284-2 2017 Nicotinamide nucleotide transhydrogenase (NNT) typically produces NADPH at the expense of NADH and DeltapH in energized mitochondria. NAD 90-94 nicotinamide nucleotide transhydrogenase Mus musculus 0-40 28580284-2 2017 Nicotinamide nucleotide transhydrogenase (NNT) typically produces NADPH at the expense of NADH and DeltapH in energized mitochondria. NAD 90-94 nicotinamide nucleotide transhydrogenase Mus musculus 42-45 28580284-4 2017 Here, we tested the role of NNT in the glucose regulation of mitochondrial NADPH and glutathione redox state and reinvestigated its role in GSIS coupling events in mouse pancreatic islets. Glucose 39-46 nicotinamide nucleotide transhydrogenase Mus musculus 28-31 28580284-4 2017 Here, we tested the role of NNT in the glucose regulation of mitochondrial NADPH and glutathione redox state and reinvestigated its role in GSIS coupling events in mouse pancreatic islets. NADP 75-80 nicotinamide nucleotide transhydrogenase Mus musculus 28-31 28580284-4 2017 Here, we tested the role of NNT in the glucose regulation of mitochondrial NADPH and glutathione redox state and reinvestigated its role in GSIS coupling events in mouse pancreatic islets. Glutathione 85-96 nicotinamide nucleotide transhydrogenase Mus musculus 28-31 28580284-10 2017 RESULTS: NNT is largely responsible for the acute glucose-induced rise in islet NADPH/NADP+ ratio and decrease in mitochondrial glutathione oxidation, with a small impact on cytosolic glutathione. Glucose 50-57 nicotinamide nucleotide transhydrogenase Mus musculus 9-12 28580284-10 2017 RESULTS: NNT is largely responsible for the acute glucose-induced rise in islet NADPH/NADP+ ratio and decrease in mitochondrial glutathione oxidation, with a small impact on cytosolic glutathione. NADP 80-85 nicotinamide nucleotide transhydrogenase Mus musculus 9-12 28580284-10 2017 RESULTS: NNT is largely responsible for the acute glucose-induced rise in islet NADPH/NADP+ ratio and decrease in mitochondrial glutathione oxidation, with a small impact on cytosolic glutathione. NADP 86-91 nicotinamide nucleotide transhydrogenase Mus musculus 9-12 28580284-10 2017 RESULTS: NNT is largely responsible for the acute glucose-induced rise in islet NADPH/NADP+ ratio and decrease in mitochondrial glutathione oxidation, with a small impact on cytosolic glutathione. Glutathione 128-139 nicotinamide nucleotide transhydrogenase Mus musculus 9-12 28580284-10 2017 RESULTS: NNT is largely responsible for the acute glucose-induced rise in islet NADPH/NADP+ ratio and decrease in mitochondrial glutathione oxidation, with a small impact on cytosolic glutathione. Glutathione 184-195 nicotinamide nucleotide transhydrogenase Mus musculus 9-12 28580284-11 2017 However, contrary to current views on NNT in beta-cells, these effects resulted from a glucose-dependent reduction in NADPH consumption by NNT reverse mode of operation, rather than from a stimulation of its forward mode of operation. Glucose 87-94 nicotinamide nucleotide transhydrogenase Mus musculus 139-142 28580284-11 2017 However, contrary to current views on NNT in beta-cells, these effects resulted from a glucose-dependent reduction in NADPH consumption by NNT reverse mode of operation, rather than from a stimulation of its forward mode of operation. NADP 118-123 nicotinamide nucleotide transhydrogenase Mus musculus 139-142 28580284-12 2017 Accordingly, the lack of NNT in J-islets decreased their sensitivity to exogenous H2O2 at non-stimulating glucose. Hydrogen Peroxide 82-86 nicotinamide nucleotide transhydrogenase Mus musculus 25-28 28580284-12 2017 Accordingly, the lack of NNT in J-islets decreased their sensitivity to exogenous H2O2 at non-stimulating glucose. Glucose 106-113 nicotinamide nucleotide transhydrogenase Mus musculus 25-28 17052203-0 2006 Nicotinamide nucleotide transhydrogenase: a link between insulin secretion, glucose metabolism and oxidative stress. Glucose 76-83 nicotinamide nucleotide transhydrogenase Mus musculus 0-40 28087333-5 2017 We demonstrate that the absence of NNT in 6J cells led to distinct mitochondrial bioenergetic profiles and a pro-oxidative mitochondrial phenotype characterized by increased superoxide production and reduced glutathione peroxidase activity. Superoxides 174-184 nicotinamide nucleotide transhydrogenase Mus musculus 35-38 23747984-2 2013 Nicotinamide nucleotide transhydrogenase (NNT), an integral protein located in the inner mitochondrial membrane, contributes to an elevated mitochondrial NADPH/NADP(+) ratio. NADP 154-159 nicotinamide nucleotide transhydrogenase Mus musculus 0-40 23747984-2 2013 Nicotinamide nucleotide transhydrogenase (NNT), an integral protein located in the inner mitochondrial membrane, contributes to an elevated mitochondrial NADPH/NADP(+) ratio. NADP 154-159 nicotinamide nucleotide transhydrogenase Mus musculus 42-45 23747984-2 2013 Nicotinamide nucleotide transhydrogenase (NNT), an integral protein located in the inner mitochondrial membrane, contributes to an elevated mitochondrial NADPH/NADP(+) ratio. NADP 160-167 nicotinamide nucleotide transhydrogenase Mus musculus 0-40 23747984-2 2013 Nicotinamide nucleotide transhydrogenase (NNT), an integral protein located in the inner mitochondrial membrane, contributes to an elevated mitochondrial NADPH/NADP(+) ratio. NADP 160-167 nicotinamide nucleotide transhydrogenase Mus musculus 42-45 23747984-7 2013 The functional evaluation of respiring mitochondria revealed major redox alterations in B6J-Nnt(MUT) mice, including an absence of transhydrogenation between NAD and NADP, higher rates of H2O2 release, the spontaneous oxidation of NADPH, the poor ability to metabolize organic peroxide, and a higher susceptibility to undergo Ca(2+)-induced mitochondrial permeability transition. Hydrogen Peroxide 188-192 nicotinamide nucleotide transhydrogenase Mus musculus 92-95 22593545-1 2012 Nicotinamide nucleotide transhydrogenase (NNT) is a mitochondrial redox-driven proton pump that couples the production of NADPH to the mitochondrial metabolic rate. NADP 122-127 nicotinamide nucleotide transhydrogenase Mus musculus 0-40 22593545-1 2012 Nicotinamide nucleotide transhydrogenase (NNT) is a mitochondrial redox-driven proton pump that couples the production of NADPH to the mitochondrial metabolic rate. NADP 122-127 nicotinamide nucleotide transhydrogenase Mus musculus 42-45 22593545-4 2012 Overexpression of NNT in a macrophage cell-line resulted in decreased levels of reactive oxygen species (ROS) and nitric oxide upon induction of the macrophage inflammatory responses. Reactive Oxygen Species 80-103 nicotinamide nucleotide transhydrogenase Mus musculus 18-21 22593545-4 2012 Overexpression of NNT in a macrophage cell-line resulted in decreased levels of reactive oxygen species (ROS) and nitric oxide upon induction of the macrophage inflammatory responses. Reactive Oxygen Species 105-108 nicotinamide nucleotide transhydrogenase Mus musculus 18-21 22593545-4 2012 Overexpression of NNT in a macrophage cell-line resulted in decreased levels of reactive oxygen species (ROS) and nitric oxide upon induction of the macrophage inflammatory responses. Nitric Oxide 114-126 nicotinamide nucleotide transhydrogenase Mus musculus 18-21 17052203-12 2006 We hypothesize that Nnt mutations enhance glucose-dependent ROS production and thereby impair beta-cell mitochondrial metabolism, possibly via activation of uncoupling proteins. Reactive Oxygen Species 60-63 nicotinamide nucleotide transhydrogenase Mus musculus 20-23 28580284-0 2017 NNT reverse mode of operation mediates glucose control of mitochondrial NADPH and glutathione redox state in mouse pancreatic beta-cells. Glucose 39-46 nicotinamide nucleotide transhydrogenase Mus musculus 0-3 28580284-0 2017 NNT reverse mode of operation mediates glucose control of mitochondrial NADPH and glutathione redox state in mouse pancreatic beta-cells. NADP 72-77 nicotinamide nucleotide transhydrogenase Mus musculus 0-3 28580284-0 2017 NNT reverse mode of operation mediates glucose control of mitochondrial NADPH and glutathione redox state in mouse pancreatic beta-cells. Glutathione 82-93 nicotinamide nucleotide transhydrogenase Mus musculus 0-3 28580284-2 2017 Nicotinamide nucleotide transhydrogenase (NNT) typically produces NADPH at the expense of NADH and DeltapH in energized mitochondria. NADP 66-71 nicotinamide nucleotide transhydrogenase Mus musculus 0-40 28580284-2 2017 Nicotinamide nucleotide transhydrogenase (NNT) typically produces NADPH at the expense of NADH and DeltapH in energized mitochondria. NADP 66-71 nicotinamide nucleotide transhydrogenase Mus musculus 42-45 23747984-7 2013 The functional evaluation of respiring mitochondria revealed major redox alterations in B6J-Nnt(MUT) mice, including an absence of transhydrogenation between NAD and NADP, higher rates of H2O2 release, the spontaneous oxidation of NADPH, the poor ability to metabolize organic peroxide, and a higher susceptibility to undergo Ca(2+)-induced mitochondrial permeability transition. NADP 231-236 nicotinamide nucleotide transhydrogenase Mus musculus 92-95 23747984-7 2013 The functional evaluation of respiring mitochondria revealed major redox alterations in B6J-Nnt(MUT) mice, including an absence of transhydrogenation between NAD and NADP, higher rates of H2O2 release, the spontaneous oxidation of NADPH, the poor ability to metabolize organic peroxide, and a higher susceptibility to undergo Ca(2+)-induced mitochondrial permeability transition. organic 269-276 nicotinamide nucleotide transhydrogenase Mus musculus 92-95 23747984-7 2013 The functional evaluation of respiring mitochondria revealed major redox alterations in B6J-Nnt(MUT) mice, including an absence of transhydrogenation between NAD and NADP, higher rates of H2O2 release, the spontaneous oxidation of NADPH, the poor ability to metabolize organic peroxide, and a higher susceptibility to undergo Ca(2+)-induced mitochondrial permeability transition. Peroxides 277-285 nicotinamide nucleotide transhydrogenase Mus musculus 92-95 23747984-8 2013 In addition, the mitochondria of B6J-Nnt(MUT) mice exhibited increased oxidized/reduced glutathione ratios as compared to B6JUnib-Nnt(W) mice. Glutathione 88-99 nicotinamide nucleotide transhydrogenase Mus musculus 37-40 23747984-10 2013 Altogether, our data suggest that NNT functions as a high-capacity source of mitochondrial NADPH and that its functional loss due to the Nnt mutation results in mitochondrial redox abnormalities, most notably a poor ability to sustain NADP and glutathione in their reduced states. NADP 91-96 nicotinamide nucleotide transhydrogenase Mus musculus 34-37 23747984-10 2013 Altogether, our data suggest that NNT functions as a high-capacity source of mitochondrial NADPH and that its functional loss due to the Nnt mutation results in mitochondrial redox abnormalities, most notably a poor ability to sustain NADP and glutathione in their reduced states. NADP 91-95 nicotinamide nucleotide transhydrogenase Mus musculus 34-37 23747984-10 2013 Altogether, our data suggest that NNT functions as a high-capacity source of mitochondrial NADPH and that its functional loss due to the Nnt mutation results in mitochondrial redox abnormalities, most notably a poor ability to sustain NADP and glutathione in their reduced states. Glutathione 244-255 nicotinamide nucleotide transhydrogenase Mus musculus 34-37 23747984-10 2013 Altogether, our data suggest that NNT functions as a high-capacity source of mitochondrial NADPH and that its functional loss due to the Nnt mutation results in mitochondrial redox abnormalities, most notably a poor ability to sustain NADP and glutathione in their reduced states. Glutathione 244-255 nicotinamide nucleotide transhydrogenase Mus musculus 137-140 17052203-1 2006 This paper reviews recent studies on the role of Nnt (nicotinamide nucleotide transhydrogenase) in insulin secretion and detoxification of ROS (reactive oxygen species). Reactive Oxygen Species 139-142 nicotinamide nucleotide transhydrogenase Mus musculus 49-52 17052203-1 2006 This paper reviews recent studies on the role of Nnt (nicotinamide nucleotide transhydrogenase) in insulin secretion and detoxification of ROS (reactive oxygen species). Reactive Oxygen Species 139-142 nicotinamide nucleotide transhydrogenase Mus musculus 54-94 17052203-1 2006 This paper reviews recent studies on the role of Nnt (nicotinamide nucleotide transhydrogenase) in insulin secretion and detoxification of ROS (reactive oxygen species). Reactive Oxygen Species 144-167 nicotinamide nucleotide transhydrogenase Mus musculus 49-52 17052203-1 2006 This paper reviews recent studies on the role of Nnt (nicotinamide nucleotide transhydrogenase) in insulin secretion and detoxification of ROS (reactive oxygen species). Reactive Oxygen Species 144-167 nicotinamide nucleotide transhydrogenase Mus musculus 54-94 17052203-4 2006 The C57BL/6J mouse displays glucose intolerance and reduced insulin secretion, which results from a naturally occurring deletion in the Nnt gene. Glucose 28-35 nicotinamide nucleotide transhydrogenase Mus musculus 136-139 17052203-7 2006 Similarly, mice carrying ENU (N-ethyl-N-nitrosourea)-induced loss-of-function mutations in Nnt were glucose intolerant and secreted less insulin during a glucose tolerance test. Ethylnitrosourea 30-51 nicotinamide nucleotide transhydrogenase Mus musculus 91-94 17052203-7 2006 Similarly, mice carrying ENU (N-ethyl-N-nitrosourea)-induced loss-of-function mutations in Nnt were glucose intolerant and secreted less insulin during a glucose tolerance test. Glucose 100-107 nicotinamide nucleotide transhydrogenase Mus musculus 91-94 17052203-10 2006 Nnt is a nuclear-encoded mitochondrial protein involved in detoxification of ROS. Reactive Oxygen Species 77-80 nicotinamide nucleotide transhydrogenase Mus musculus 0-3 17052203-11 2006 beta-Cells isolated from Nnt mutant mice showed increased ROS production on glucose stimulation. Reactive Oxygen Species 58-61 nicotinamide nucleotide transhydrogenase Mus musculus 25-28 17052203-11 2006 beta-Cells isolated from Nnt mutant mice showed increased ROS production on glucose stimulation. Glucose 76-83 nicotinamide nucleotide transhydrogenase Mus musculus 25-28 17052203-12 2006 We hypothesize that Nnt mutations enhance glucose-dependent ROS production and thereby impair beta-cell mitochondrial metabolism, possibly via activation of uncoupling proteins. Glucose 42-49 nicotinamide nucleotide transhydrogenase Mus musculus 20-23 16804088-0 2006 Deletion of nicotinamide nucleotide transhydrogenase: a new quantitive trait locus accounting for glucose intolerance in C57BL/6J mice. Glucose 98-105 nicotinamide nucleotide transhydrogenase Mus musculus 12-52 16497723-6 2006 The forward reaction of NNT, a nuclear-encoded mitochondrial inner membrane protein, couples the generation of NADPH to proton transport and provides NADPH for the regeneration of two important antioxidant compounds, glutathione and thioredoxin, in the mitochondria. NADP 111-116 nicotinamide nucleotide transhydrogenase Mus musculus 24-27 16497723-6 2006 The forward reaction of NNT, a nuclear-encoded mitochondrial inner membrane protein, couples the generation of NADPH to proton transport and provides NADPH for the regeneration of two important antioxidant compounds, glutathione and thioredoxin, in the mitochondria. NADP 150-155 nicotinamide nucleotide transhydrogenase Mus musculus 24-27 16497723-6 2006 The forward reaction of NNT, a nuclear-encoded mitochondrial inner membrane protein, couples the generation of NADPH to proton transport and provides NADPH for the regeneration of two important antioxidant compounds, glutathione and thioredoxin, in the mitochondria. Glutathione 217-228 nicotinamide nucleotide transhydrogenase Mus musculus 24-27 16399503-6 2006 Nnt mutant mice were glucose intolerant and secreted less insulin during a glucose tolerance test. Glucose 21-28 nicotinamide nucleotide transhydrogenase Mus musculus 0-3 16399503-8 2006 Glucose utilization and production of reactive oxygen species were increased in Nnt beta cells. Glucose 0-7 nicotinamide nucleotide transhydrogenase Mus musculus 80-83 16399503-8 2006 Glucose utilization and production of reactive oxygen species were increased in Nnt beta cells. Reactive Oxygen Species 38-61 nicotinamide nucleotide transhydrogenase Mus musculus 80-83 16399503-9 2006 We hypothesize that Nnt mutations/deletion uncouple beta cell mitochondrial metabolism leading to less ATP production, enhanced KATP channel activity, and consequently impaired insulin secretion. Adenosine Triphosphate 103-106 nicotinamide nucleotide transhydrogenase Mus musculus 20-23