Flies expressing fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4Act5C.PU display a reduced tolerance for elevated dietary iron. Treatment with sucrose or sodium citrate has no effect on survival. Levels of the iron sulphur cluster enzyme aconitase activity are reduced compared with control flies. The reduction in complex II activity in control flies in response to elevated iron levels is more severe upon expression of fhdsRNA.Scer\UAS.cLa. Citrase synthase activity is unaffected.
Flies expressing flies expressing >fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4Act.PU are short lived compared to controls. Early treatment with iron chelator deferiprone (DFP) moderately improves survival of flies expressing Scer\GAL4Act.PU>fhdsRNA.Scer\UAS.cLa. Early treatment with DFP also results in improved climbing ability in flies expressing fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4Act.PU Scer\GAL4neur-GAL4-A101.
Idebenone (IDE) is administration to one-day post-eclosion adults improves life span of flies expressing Scer\GAL4Act.PU>fhdsRNA.Scer\UAS.cLa. Early treatment does not result any significant changes in life span. The impaired climbing ability of Scer\GAL4Act.PU>fhdsRNA.Scer\UAS.cLa is improved during the second week after IDE treatment.
Expression of fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4repo.PU results in reduced lifespan, decreased survival under hyperoxia conditions as well as impaired climbing ability in adult flies.
Expression of fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4neur-GAL4-A101 results in a statistically significant reduction in life span compared to controls (expression under the control of either Scer\GAL4D42, Scer\GAL4c698a or Scer\GAL4Ddc.PL has no effect on life span).
Expression of fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4Act.PU at 25[o]C results viable adults which show a reduction of mean and maximum life span of 60% and 32% respectively compared to controls under normoxia. In addition, 45% of 5 day old flies expressing fhdsRNA.Scer\UAS.cLa under these conditions show a reduction in climbing ability compared to controls.
Adults expressing fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4Act.PU at 25[o]C under hyperoxia (99.5% O[[2]]) show a 44% reduction in average maximum life span compared to controls.
Mitochondria isolated from 1-day old adults expressing fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4Act.PU at 25[o]C show normal state 3 (active respiration state) and state 4 (basal respiration state) oxygen consumption rates under normoxic conditions. Under hyperoxia, the mutant mitochondria show a two-fold reduction in state 3 oxygen consumption rates compared to controls. Oxygen consumption rates after stimulation of complex I of after stimulation of complex II are the same in the mutant and control mitochondria under both normoxic and hyperoxic conditions.
fhRNAi.UAS.cLa has short lived | nutrition conditional phenotype, enhanceable by Scer\GAL4Act5C.PU/mfrnUAS.cNa
Scer\GAL4Act5C.PU, fhRNAi.UAS.cLa has chemical sensitive phenotype, suppressible | partially by Fer3HCHUAS.cMa, Scer\GAL4Act5C.PU
Scer\GAL4Act5C.PU, fhRNAi.UAS.cLa has chemical sensitive phenotype, suppressible | partially by Fer2LCHUAS.cMa/Fer1HCHUAS.cMa, Scer\GAL4Act5C.PU
fhRNAi.UAS.cLa has short lived phenotype, suppressible by Scer\GAL4Act5C.PU/Fer3HCHUAS.cMa
Scer\GAL4Act5C.PU, fhRNAi.UAS.cLa has chemical sensitive phenotype, suppressible | partially by mfrnGD336/Scer\GAL4Act5C.PU
fhRNAi.UAS.cLa has short lived | nutrition conditional phenotype, suppressible | partially by mfrnGD336/Scer\GAL4Act5C.PU
fhRNAi.UAS.cLa has short lived | nutrition conditional phenotype, suppressible by Scer\GAL4Act5C.PU/Fer2LCHUAS.cMa/Fer1HCHUAS.cMa
fhRNAi.UAS.cLa has short lived phenotype, suppressible by Scer\GAL4Act5C.PU/Fer2LCHUAS.cMa/Fer1HCHUAS.cMa
fhRNAi.UAS.cLa has short lived | nutrition conditional phenotype, suppressible by Scer\GAL4Act5C.PU/Fer3HCHUAS.cMa
Scer\GAL4repo.PU, fhRNAi.UAS.cLa has abnormal oxidative stress response | adult stage phenotype, suppressible | partially by GLazUAS.cWa, Scer\GAL4repo.PU
Scer\GAL4repo.PU, fhRNAi.UAS.cLa has short lived phenotype, suppressible | partially by GLazUAS.cWa, Scer\GAL4repo.PU
Scer\GAL4repo.PU, fhRNAi.UAS.cLa has abnormal locomotor behavior phenotype, suppressible | partially by GLazUAS.cWa, Scer\GAL4repo.PU
Expression of Fer3HCHScer\UAS.cMa partially suppresses the reduction in lifespan seen in flies expressing fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4Act5C.PU when fed either normal food or food supplemented with iron. The reduced aconitase levels are not restored by Fer3HCHScer\UAS.cMa.
Co-expression of Fer1HCHScer\UAS.cMa and Fer2LCHScer\UAS.cMa partially suppresses the reduction in lifespan seen in flies expressing fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4Act5C.PU when fed either normal food or food supplemented with iron. The reduced aconitase levels are not restored.
Expression of mfrnGD336 suppresses the reduced survival seen when fhdsRNA.Scer\UAS.cLa is expressed under the control of Scer\GAL4Act5C.PU in response to 2.5mM iron treatment. The reduced survival seen in fhdsRNA.Scer\UAS.cLa-expressing flies at 15mM iron treatment is not suppressed by mfrnScer\UAS.cNa. The reduction in aconitase activity is completely restored.
Expression of mfrnGD336 enhances the reduction in lifespan seen when fhdsRNA.Scer\UAS.cLa is expressed under the control of Scer\GAL4Act5C.PU on a normal diet.
Expression of mfrnScer\UAS.cNa enhances the reduction in lifespan seen when fhdsRNA.Scer\UAS.cLa is expressed under the control of Scer\GAL4Act5C.PU in response to elevated dietary iron. Aconitase activity is unaffected. Lifespan reduction is also enhanced on normal food.
The reduced lifespan, decreased survival under hyperoxia conditions as well as the impaired climbing ability characteristic for adult flies expressing fhdsRNA.Scer\UAS.cLa under the control of Scer\GAL4repo.PU is partially restored by co-expression of GLazScer\UAS.cWa.