Summary
Alzheimer’s disease (AD) is an age-related, progressive neurodegenerative disorder that occurs gradually and results in memory, behavior, and personality changes. Abnormal sphingolipid metabolism was reported in AD previously. This study aimed to investigate whether sphK1 could exacerbate the accumulation of amyloid protein (Aβ) and sharpen the learning and memory ability of the animal model of AD using siRNA interference. An adenovirus vector expressing small interfering RNA (siRNA) against the sphK1 gene (sphK1-siRNA) was designed, and the effects of sphK1-siRNA on the APP/PS1 mouse four weeks after treatment with sphK1-siRNA hippocampal injection were examined. SphK1 protein expression was confirmed by using Western blotting and ceramide content coupled with S1P secretion was evaluated by enzyme-linked immunosorbent assay (ELISA). Aβ load was detected by immunohistochemical staining and ELISA. Morris water maze was adopted to test the learning and memory ability of the APP/PS1 mice. A significant difference in the expression of sphK1 protein and mRNA was observed between the siRNA group and the control group. Aβ load in transfected mice was accelerated in vivo, with significant aggravation of the learning and memory ability. The sphK1 gene modulation in the Aβ load and the learning and memory ability in the animal model of AD may be important for the treatment of AD.
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References
Selkoe D. The deposition of amyloid proteins in the aging mammalian brain: implications for Alzheimer’s disease. Ann Med, 1989,21(2):73–76
He X, Huang Y, Li B, et al. Deregulation of sphingolipid metabolism in Alzheimer’s disease. Neurobiol Aging 2010,31(3):398–408
Walsh DM, Selkoe DJ. Aβ oligomers-a decade of discovery. J Neurochem, 2007,101(5):1172–1184
Kirkitadze MD, Bitan G, Teplow DB. Paradigm shifts in Alzheimer’s disease and other neurodegenerative disorders: the emerging role of oligomeric assemblies. J Neurosci Res, 2002,69(5):567–577
Shankar GM, Li S, Mehta TH, et al. Amyloid-β protein dimers isolated directly from Alzheimer’s brains impair synaptic plasticity and memory. Nat Med, 2008,14(8): 837–842
Näslund J, Haroutunian V, Mohs R, et al. Correlation between elevated levels of amyloid beta-peptide in the brain and cognitive decline. JAMA, 2000,283(12): 1571–1577
Hannun YA, Obeid LM. The ceramide-centric universe of lipid-mediated cell regulation: stress encounters of the lipid kind. J Biol Chem, 2002,277(29):25847–25850
Spiegel S, Milstien S. Sphingosine-1-phosphate: an enigmatic signalling. Nat Rev Mol Cell Biol, 2003,4(5): 397–407
Bryan L, Kordula T, Spiegel S, et al. Regulation and functions of sphingosine kinases in the brain. Biochim Biophys Acta, 2008,1781(9):459–466
Gomez-Brouchet A, Pchejetski D, Brizuela L, et al. Critical role for sphingosine kinase-1 in regulating survival of neuroblastoma cells exposed to amyloid-beta peptide. Mol Pharmacol, 2007,72(2):341–349
Van Brocklyn JR, Jackson CA, Pearl DK, et al. Sphingosine kinase-1 expression correlates with poor survival of patients with glioblastoma multiforme: roles of sphingosine kinase isoforms in growth of glioblastoma cell lines. J Neuropathol Exp Neurol, 2005,64(8):695–705
Liu H, Sugiura M, Nava VE, et al. Molecular cloning and functional characterization of a novel mammalian sphingosine kinase type 2 isoform. J Biol Chem, 2000,275(26): 19513–19520
Spiegel S, Milstien S. Functions of the multifaceted family of sphingosine kinases and some close relatives. J Biol Chem, 2007,282(4):2125–2129
Anelli V, Gault CR, Cheng AB, et al. Sphingosine kinase 1 is upregulated during hypoxia in U87MG glioma cells: role of hypoxia-inducible factors 1 and 2. J Biol Chem, 2008,283(6):3365–3375
Shinpo K, Kikuchi S, Moriwaka F, et al. Protective effects of the TNF-ceramide pathway against glutamate neurotoxicity on cultured mesencephalic neurons. Brain Res, 1999,819(1–2):170–173
Kajimoto T, Okada T, Yu H, et al. Involvement of sphingosine-1-phosphate in glutamate secretion in hippocampal neurons. Mol Cell Biol, 2007,27(9):3429–3440
Robbins PD, Ghivizzani SC. Viral vectors for gene therapy. Pharmacol Ther, 1998,80(1):35–47
Chang KA, Suh YH. Pathophysiological roles of amyloidogenic carboxy-terminal fragments of the β-amyloid precursor protein in Alzheimer’s disease. J Pharmacol Sci, 2005,97(4):461–471
Zhang YH, Fehrenbacher JC, Vasko MR, et al. Sphingosine-1-phosphate via activation of a G-protein-coupled receptor (s) enhances the excitability of rat sensory neurons. J Neurophysiol, 2006,96(3):1042–1052
Patil S, Melrose J, Chan C. Involvement of astroglial ceramide in palmitic acid-induced Alzheimer-like changes in primary neurons. Eur J Neurosci, 2007,26(8):2131–2141
Puglielli L, Ellis BC, Saunders, AJ, et al. Ceramide stabilizes beta-site amyloid precursor protein-cleaving enzyme 1 and promotes amyloid beta-peptide biogenesis. J Biol Chem, 2003,278(22):19777–19783
Tamboli IY, Prager K, Barth E, et al. Inhibition of glycosphingolipid biosynthesis reduces secretion of the beta-amyloid precursor protein and amyloid beta-peptide. J Biol Chem, 2005,280(30):28110–28117
Grimm MO, Grimm HS, Pätzold AJ, et al. Regulation of cholesterol and sphingomyelin metabolism by amyloid-β and presenilin. Nat Cell Biol, 2005,7(11):1118–1123
Palop JJ, Mucke L. Amyloid-beta-induced neuronal dysfunction in Alzheimer’s disease: from synapses toward neural networks. Nat Neurosci, 2010,13(7):812–818
Haughey NJ, Bandaru VV, Bae M, et al. Roles for dysfunctional sphingolipid metabolism in Alzheimer’s disease neuropathogenesis. Biochim Biophys Acta, 2010, 1801(8):878–886
Yu N, Lariosa-Willingham KD, Lin FF, et al. Characterization of lysophosphatidic acid and sphingosine-1-phosphate-mediated signal transduction in rat cortical oligodendrocytes. Glia, 2004,45(1):17–27
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These authors contributed equally to this work.
This project was supported by the National Natural Science Foundation of China (No. 81070879).
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Zhang, Y., Yu, Q., Lai, Tb. et al. Effects of small interfering RNA targeting sphingosine kinase-1 gene on the animal model of Alzheimer’s disease. J. Huazhong Univ. Sci. Technol. [Med. Sci.] 33, 427–432 (2013). https://doi.org/10.1007/s11596-013-1136-5
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DOI: https://doi.org/10.1007/s11596-013-1136-5