This suggests a key role for activating Akt1 in the protection of mesenchymal stem cell from the precocious death.
Amyotrophic lateral sclerosis (ALS) is a neurodegenerative disease that is characterized by clinical and pathological signs of upper and lower motor neuron degeneration, progressive paralysis and precocious death (1).
Interestingly, however, Crz-gal4 driveN N ICD expression (i.e. after differentiation of EW3 into vCrz neurons) did not trigger precocious death of vCrz neurons in larva (Fig. 11B) or during metamorphosis (data not shown).
Primary mitochondrial disorders due to impaired oxidative phosphorylation (OXPHOS) are a well-established cause of severe disability and precocious death in both children and adults (Koopman et al., 2012).
These data also confirm that not only exogenously overexpressed, but also the endogenous Gαs can induce the precocious cell death upon overactivation.
Overactivation of Gαs with cholera toxin mimics expression of constitutively activated Gαs and promotes wing blistering due to precocious cell death.
Expression of the GTPase-deficient point mutant of Gαs induces precocious cell death, which results in hemolymph accumulation between the two epithelial wing sheets and wing blistering [22], [23], Fig. 6A.
Expression of the constitutively active form of Gαs leads to precocious cell death in the wing epidermis, which results in failure of the closure of the dorsal and ventral wing sheets and accumulation of the hemolymph inside the wing, producing wing blistering [22], [23].
While the precocious cell death of Fz3 −/− motor neurons can be rescued by eliminating Bax, the axon stalling phenotype remains unchanged.
The loss of Fz3 also leads to the precocious apoptotic death of affected cranial and spinal motor neurons, a phenotype not observed in embryos with defective EphrinA/EphA4 and GDNF/Ret signaling (Helmbacher et al., 2000; Kramer et al., 2006).
