α-Endosulfine regulates amyloid β42 via the modulation of neprilysin activity
Watamura, N.; Kakiya, N.; Nilsson, P.; Tsubuki, S.; Kamano, N.; Takahashi, M.; Hashimoto, S.; Sasaguri, H.; Saito, T.; Saido, T.
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The neuropeptide somatostatin (SST) regulates amyloid {beta} peptide (A{beta}) catabolism by enhancing neprilysin (NEP)-catalyzed proteolytic degradation. However, the mechanism by which SST regulates NEP activity remains unclear. Here we report the identification by differential proteomics of -endosulfine (ENSA), an endogenous ligand of the ATP-sensitive potassium (KATP) channel, as a negative regulator of NEP activity downstream of SST signaling. Genetic deficiency of ENSA resulted in enhanced NEP activity and decreased A{beta} deposition in the brains of wild-type and Alzheimers disease (AD) model mice. Pharmacological intervention to increase the probability of KATP channel opening reduced A{beta} deposition in AD model mice. Our findings provide new insights into possible mechanisms to prevent AD.
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