Increased acetylation of Peroxiredoxin1 by HDAC6 inhibition leads to recovery of Aβ-induced impaired axonal transport
© The Author(s). 2017
Received: 12 August 2016
Accepted: 22 February 2017
Published: 28 February 2017
Reduction or inhibition of histone deacetylase 6 (HDAC6) has been shown to rescue memory in mouse models of Alzheimer’s disease (AD) and is recently being considered a possible therapeutic strategy. However, the restoring mechanism of HDAC6 inhibition has not been fully understood.
Methods and results
Here, we found that an anti-oxidant protein Peroxdiredoxin1 (Prx1), a substrate of HDAC6, malfunctions in Aβ treated cells, the brains of 5xFAD AD model mice and AD patients. Malfunctioning Prx1, caused by reduced Prx1 acetylation levels, was recovered by HDAC6 inhibition. Increasing acetylation levels of Prx1 by HDAC6 inhibition recovered elevated reactive oxygen species (ROS) levels, elevated Ca2+ levels and impaired mitochondrial axonal transport, sequentially, even in the presence of Aβ. Prx1 mutant studies on the K197 site for an acetylation mimic or silencing mutation support the results showing that HDAC6 inhibitor restores Aβ-induced disruption of ROS, Ca2+ and axonal transport.
Taken together, increasing acetylation of Prx1 by HDAC6 inhibition has several beneficial effects in AD pathology. Here, we present the novel mechanism by which elevated acetylation of Prx1 rescues mitochondrial axonal transport impaired by Aβ. Therefore, our results suggest that modulation of Prx1 acetylation by HDAC6 inhibition has great therapeutic potential for AD and has further therapeutic possibilities for other neurodegenerative diseases as well.
KeywordsAlzheimer’s disease Histone deacetylase 6 Peroxiredoxin1 Axonal transport Oxidative stress Reactive oxygen species
Alzheimer’s disease (AD) is the most common neurodegenerative disease that leads to cognitive impairment. The major pathological features of AD are extracellular accumulation of beta-amyloid (Aβ), called senile plaque, and intracellular neurofibrillary tangles which are composed of hyperphosphorylated tau [1, 2]. There are several well-known cytotoxic effects and molecular changes of Aβ. Aβ disrupts axonal transport by dysregulating microtubule stability and affinity between motor or adaptor proteins and microtubule or cargos [3, 4]. Axonal transport is important for neuronal function and cell viability [5–7]. Oxidative stress, which is caused by increased reactive oxygen species (ROS), and excessive cytosolic Ca2+ are induced by Aβ . ROS oxidize lipids, proteins and nucleic acids which are essential for normal cellular function, which leads to increased membrane permeability to Ca2+, mitochondrial damage and apoptosis [8–11]. Excessive Ca2+ is involved in excitotoxicity which also contributes to neuronal cell death [12, 13]. In addition, ROS and Ca2+ damage to mitochondrial axonal transport is mediated by reduced affinity between Miro and kinesin [14, 15].
One of the molecular changes in AD include increased levels and activity of histone deacetylase 6 (HDAC6) in the brains of AD patients [16, 17]. HDAC6 is localized in the cytoplasm and deacetylates cytosolic proteins such as α-tubulin and Peroxiredoxin1 (Prx1) [18–20]. Some researchers have shown that reducing or inhibiting HDAC6 in AD model mice resulted in improved memory [21–23]. In addition, Aβ-induced impairment of mitochondrial axonal transport was rescued by HDAC6 inhibitor in primary neurons . Even though HDAC6 has great possibility as an AD therapeutic target, the restoring mechanisms of HDAC6 inhibition are not fully understood.
Here we found one possible mechanism which is mediated by Prx1. A previous report has shown that increasing Prx1 acetylation elevates its reducing activity . Since Prx1 is an HDAC6 substrate, increased HDAC6 activity may cause poor reducing activity of Prx1. Therefore, we studied whether HDAC6 inhibition can regulate ROS level through acetylation of Prx1. Furthermore, we tried to elucidate whether restored axonal transport by HDAC6 inhibitor is mediated by Prx1. Together, we propose that increased acetylation of Prx1 by HDAC6 inhibition leads to recovery of Aβ-induced pathology such as elevation of ROS and Ca2+ and impaired axonal transport, making HDAC6 a possible therapeutic target for AD.
Human brain samples
Neuropathological processing of normal and AD human brain samples followed the procedures previously established for the Boston University Alzheimer’s Disease Center (BUADC). Entorhinal cortex and hippocampal regions were used for experiments. Detailed information of brain tissues is described in Additional file 1. In all cases where AD was diagnosed at autopsy, AD was stated as the cause of death. AD subjects had no evidence of other neurological disease based on neuropathological examination. Next of kin provided informed consent for participation and brain donation. The study was performed in accordance with principles of human subject protection in the Declaration of Helsinki. This study was reviewed by the Boston University School of Medicine Institutional Review Board and was approved as exempt because the study involves only tissue collected from post-mortem, and consequently not classified as human subjects.
Animals and intraperitoneal (i.p.) injection
Six-month-old 5xFAD mice (Tg6799; B6SJL-Tg (APPSwFlLon, PSEN* M146L*L286V) 6799Vas/J, stock number 006554, Jackson Labs, Bar Harbor, ME, USA) overexpressing human amyloid precursor protein 695 with three mutations (Swedish, Florida and London) and human presenilin 1 with two mutations (M146L and L286V) under transcriptional control of the murine Thy-1 promoter and wild type littermate (B6/SJL) were used for brain tissue analysis after Tubastatin A (TBA) injection. TBA (100 mg/kg) or saline was administrated daily by i.p. injection for 4 weeks. Animals were treated and maintained in accordance with the Animal Care and Use Guidelines of Seoul National University, Seoul, Korea.
Cell culture and transfection
HT22 cells were cultured in Dulbecco’s modified Eagles medium (DMEM; HyClone, USA) supplemented with 10% fetal bovine serum (Hyclone, USA) and 1% penicillin/streptomycin (Sigma, USA) at 37 °C under 5% CO2. Primary neuronal were previously described . Briefly, primary hippocampal neurons were obtained from the brain tissue of Sprague–Dawley rat embryos (E18) (KOATECH, Korea). Brains were incubated in Hank’s Balanced Salt Solution (HBSS; WelGENE, Korea) with 0.05% trypsin (Gibco, USA) for 20 min at 37 °C. Neurons dissociated in NeuroBasal medium (Gibco, USA) supplemented with B27 (Gibco, USA) and penicillin/streptomycin were plated on poly-D-lysine (Sigma, USA) coated dishes or microfluidic chambers for immunoprecipitation or mitochondrial axonal transport analysis, respectively. Half of the culture medium was replaced with fresh medium every 3 days for plates and every day for microfluidic chambers. For transfection, constructs were mixed with Lipofectamine LTX (Invitrogen, USA) in Opti-MEM (Gibco, USA) for HT22 cells and Lipofectamine 2000 (Invitrogen, USA) in fresh neuronal culture medium for primary neurons.
DNA constructs, reagents and antibodies
Three Flag-tagged Prx1 constructs – Prx1-WT-Flag, Prx1-K197Q-Flag and Prx1-K197R-Flag – and another three non-tagged vectors that express GFP separately – Prx1-WT, Prx1-K197Q and Prx1-K197R - were used. Prx1-WT-Flag construct based on pCR3.1 vector was kindly gifted by Dr. Sang Won Kang (Ewha Womans University, Seoul, Korea). Prx1-K197Q-Flag and Prx1-K197R-Flag vectors were generated by point mutation from Prx1-WT-Flag vector using site-directed mutagenesis kit (Enzynomics, Korea) according to manufacturer’s instructions. Three non-tagged, separately GFP-expressing Prx1 vectors were constructed from Flag-tagged Prx1 vectors by BamHI and NotI restriction and insertion into pBI-CMV2 vector (Clontech, USA) which has two identical independently expressed promoters, one of which expresses AcGFP. For mitochondrial labeling, pDsRed2-Mito (Clontech, USA) were used. Tubastatin A (TBA) was purchased from Sigma (USA) and U-chem (Korea). N-acetyl cysteine (NAC), Trolox (Sigma, USA) and BAPTA-AM (ThermoFisher Scientific, USA), Aβ1–42 peptide (American peptide, USA and Bachem, Switzerland) were used. Anti-Flag, acetyl-tubulin and β-actin antibodies were purchased from Sigma (USA). Antibodies against Prx1 (CST, USA), 4-HNE, 8-OHdG (Abcam, UK) and Tom2 (SantaCruz, USA) were also used. Acetyl-Prx1 antibodies were generated from chicken using BSA-conjugated synthetic peptide (Peptron Inc., Korea) with a sequence of SKEYFSK(Ac)QK, C-terminal of Prx1. For antibody selection, four rounds of bio-panning were performed as described previously using magnetic bead conjugated with BSA-acetylated Prx1 peptide after removing non-acetylated Prx1 binders using BSA-non-acetylated Prx1 peptide (BSA-CGGGSSKEYFSKQK) . Affinity chromatography using Protein A agarose beads (Repligen 16 Corp., USA) was then used to purify acetyl-Prx1 antibodies (clone name: R2-31) .
Preparation of Aβ
Aβ1–42 peptide (American peptide, USA and Bachem, Switzerland) was prepared as previously described . In brief, Aβ1–42 peptide was dissolved in 1,1,1,3,3,3-hexafluoro-2-propanol (Sigma, USA) and lyophilized in a Speedvac (Labconco, USA). The dry peptide was dissolved in anhydrous dimethyl sulfoxide (Sigma, USA) at a final concentration of 1 mM and diluted in DMEM or cell culture medium. During treating to cells, most of Aβ consisted predominantly of oligomers and some monomers .
Immunoprecipitation and western blotting
Cells were lysed in 1% Triton X-100 in TBS buffer (50 mM Tris HCl, 150 mM NaCl, pH 7.4) containing protease inhibitor cocktail, phenyl-methylsulfonyl fluoride (PMSF) (Sigma, USA) and TBA for HDAC6 inhibition. Flag-tagged Prx1 was immunoprecipitated using anti-Flag M2 magnetic beads (Sigma, USA) and eluted by competition with 3xFlag peptide (Sigma, USA) according to manufacturer’s instructions. Elutes were mixed with SDS-PAGE sample buffer, and boiled at 95 °C for 3 min. For immunoprecipitation of endogenous Prx1, anti-Prx1 antibodies and protein A/G agarose beads (SantaCruz, USA) were crosslinked by BS3 (ThermoFisher Scientific, USA) according to manufacturer’s instructions and then incubated with cell lysates overnight at 4 °C. Precipitates were eluted with SDS-PAGE sample buffer by boiling at 95 °C for 3 min. Both boiled elutes and equal amounts of input samples were separated via SDS-PAGE and transferred to polyvinylidene difluoride (PVDF) membranes. Membranes were blocked with 5% skim milk (Bioworld, USA) and probe with antibodies against indicated proteins. Western blotting process has been also described in a previous report .
For ROS measurement, cells were treated with 1 μM of cell-permeant 2′, 7′-dichlorodihydrofluorescein diacetate (H2DCFDA, mentioned DCFDA in this paper) (Invitrogen, USA) in DMEM. After 1 h incubation at 37 °C, DCFDA was changed with DMEM. Fluorescent signals were captured using fluorescence microscope (Olympus, Japan) or CellInsight (Thermo Scientific, USA). Images obtained from fluorescence microscope were analyzed using Image J (NIH) and images from CellInsight using its software.
For measuring Ca2+ concentration, cells were incubated with fluo-4 (Invitrogen, USA) for 1 h at 37 °C. After changing medium to DMEM, fluorescent signals were captured using fluorescence microscope or CellInsight. Images obtained from fluorescence microscope were analyzed using Image J (NIH) and from CellInsight using its software.
Mitochondrial axonal transport analysis
Fabrication of microfluidic chambers and analysis of mitochondrial axonal transport were described in the reference . In brief, neurons cultured in microfluidic chambers were transfected with pDsRed2-Mito at day in vitro (DIV) 7 or 8 to visualize mitochondria. Prx1 constructs, which express AcGFP, were simultaneously transfected with pDsRed2-Mito. After treatment with indicated compounds, live cells were time-lapse imaged using Olympus IX81 microscope (Japan) equipped with a Cool SNAP HQ2 CCD camera (Photometrics, USA), controlled by MetaMorph Software (Universal Imaging, USA), for 2 min, with a 1 s interval in an incubating equipment (Live cell instrument, Korea) which maintains 37 °C and 5% CO2. Movies were processed using MetaMorph. Mitochondrial movement in axons were analyzed by using Image J installed with multiple kymograph plugins (by J. Rietdorf and A. Seitz).
Mice were anesthetized with a mixture of Zoletil 50 (Virbac, France) and Rompun (Bayer, USA) solution (3:1 ratio, 1 ml/kg, i.p.) and were transcardially perfused with phosphate buffered-saline (PBS). The hemisphere of the brain was dissected and incubated in 4% paraformaldehyde (PFA) for 36 h, followed by 30% sucrose for 72 h at 4 °C. Serial 30-μm-thick coronal tissue sections were made using freezing microtome (Leica, USA). For 4-HNE and 8-OHdG immunostaining using 3, 3′-diaminobenzidine (DAB), free-floating sections were incubated overnight at 4 °C with anti-4-HNE (1:200) and 8-OHdG (1:400) antibodies diluted in PBS containing 0.3% Triton X-100, 0.05% bovine serum albumin (BSA) and normal horse serum. Sections were then treated with 3% H2O2 in PBS for 30 min at room temperature (RT) to quench the activity of endogenous peroxidase, followed by incubation with biotinylated secondary antibodies (1:200; Vector Laboratories, USA) for 2 h at RT and then with an avidin-biotin complex (Vector Laboratories, USA) for 1 h at RT. Immunoreactivity was visualized by DAB in 0.05 M Tris-buffered saline (pH 7.6). Finally, sections were mounted on poly-L-lysine (Sigma, USA) coated Histobond glass slides (Marienfeld, Germany), air-dried overnight, serial ethanol dehydrated and coverslipped with Permount (Fisher Scientific, USA). For fluorescent staining with anti-acetyl-Prx1 (1:50) and Tom20 (1:200), sections were incubated overnight at 4 °C with indicated antibodies diluted in PBS containing 1% Triton X-100 and normal horse serum, followed by incubation with Alexa Fluor 488 and 594 secondary antibodies (ThermoFisher Scientific, USA) for 1 h at RT. Sections were washed with PBS every incubation step. For acetyl-Prx1 staining of human brain tissues using DAB, paraffin-embedded tissue sections were deparaffinized in 55 °C dry-oven for overnight. Rehydrated and endogenous peroxidase quenched tissue sections were incubated with anti-acetyl-Prx1 antibody (1:100) at 4 °C for overnight and the rest of procedures were equal to be described above. The images were acquired using Olympus FSX 100 (Olympus, Japan) or confocal microscope (Carl Zeiss, Germany) for DAB stained sections or fluorescent labeling sections, respectively. Image J was used for quantifying immunoreactivity.
Data were analyzed by two-way analysis of variance (ANOVA) or one-way ANOVA with Bonferroni post-hoc tests. All data were shown as mean ± SEM.
Acetylation level of Prx1 was decreased in the brains of AD patients and acetylation of Prx1 is regulated by both Aβ and HDAC6
ROS and Ca2+ are regulated by HDAC6 inhibitor
Aβ-induced ROS regulates intracellular Ca2+ level
Recovery of Aβ-induced ROS and Ca2+ elevation by HDAC6 inhibitor is mediated by acetylation of Prx1
HDAC6 inhibitor rescues mitochondrial axonal transport impaired by Aβ through acetylated Prx1
Additional file 6: Disrupted mitochondrial axonal transport by Aβ is recovered by ROS inhibitor or Ca2+ chelator. Representative mitochondrial movements in axons of primary hippocampal neurons which are related to Fig. 5b. Scale bar: 10 μm. (MOV 574 kb)
Additional file 7: Acetylation of Prx1 regulate mitochondrial axonal transport in the presence of Aβ. Representative mitochondrial movements in axons of primary hippocampal neurons which are related to Fig. 5c. Scale bar: 10 μm. (MOV 674 kb)
HDAC6 inhibitor rescues oxidative stress and mitochondrial transport by elevating acetylation of Prx1 in 5xFAD mice
In addition, modulation of Prx1 acetylation, not Prx1 itself, is more important for treatment of AD, because Prx1 is already increased in AD patients’ brains [38, 39]. Although researchers consider that this may be the result of a cellular protective mechanism [38, 39], oxidative stress still remain in AD brains. Therefore, increasing acetylation of Prx1 is important to elevate anti-oxidant activity of Prx1. In this study, we demonstrated that elevating acetylation of Prx1 by HDAC6 inhibition in AD condition could recovered Aβ-induced oxidative stress followed by restoring excessive Ca2+ and mitochondrial axonal transport. Thus, modulating acetylation of Prx1 could be one of therapeutic targets for AD.
Several researchers showed that reduction or inhibition of HDAC6 ameliorated memory impairment in AD mice model [21–23, 40]. They proposed that the mechanism of memory rescue works by restoring axonal transport by increasing microtubule stability or recovering autophagy. In addition, the novel mechanism presented in this study could explain memory rescue through HDAC6 inhibition. Well-known pathogenic features of Aβ include elevated ROS and disrupted Ca2+ homeostasis and axonal transport [1, 41]. Excessive ROS in AD trigger oxidative stress, which leads to neuronal dysfunction and cell death by Aβ production, lipid peroxidation, enhancement of protein oxidation, and disruption of gene regulation through DNA oxidation [8, 31, 42, 43]. Lipid peroxidation causes ion imbalance and impairs metabolism by weakening cell membranes . Moreover, Torres et al. suggested that the severity of cognitive impairment is directly related to the level of oxidative stress . Elevated Ca2+ activates several enzymes such as calcineurin and calpain, which leads to neurite atrophy, disruption in synaptic plasticity and apoptotic cell death [12, 13, 46, 47]. A report also shows that the onset of cognitive symptoms in AD is tightly correlated with reduction of Ca2+-binding proteins [48, 49]. Since neurons have unique polarized shapes such as long axons, axonal transport is important for communication between cell bodies and axon terminals. Therefore, axonal transport deficit leads to several deleterious effects in neurons. Clearance of misfolded proteins in axons and response to neurotrophic signals or stress insults require axonal transport [3, 5, 7]. Specifically, mitochondrial axonal transport is important for supplying energy to the distal axon to maintain synaptic function . Amyloid precursor protein processing, from which Aβ is generated, is stimulated by axonal blockade . In addition, it is reported that excessive ROS and Ca2+ damage axonal transport of mitochondria and synaptic vesicles [14, 15]. These findings suggest that disrupted ROS, Ca2+ homeostasis and axonal transport, assumed to be early pathologic events, are crucial for neuronal cell death and cognitive impairment in AD. Therefore, HDAC6 inhibitor could recover memory impairment in AD mice models. Moreover, since disrupted ROS, Ca2+ homeostasis and axonal transport are common pathologies of neurodegenerative diseases [3, 13, 51], it is expected that HDAC6 inhibitor could also have therapeutic effects in other neurodegenerative diseases.
To explore potential use for clinical treatment of HDAC6 inhibitor, we tested both posttreatment and pretreatment of TBA (Fig. 2 and Additional file 3). The results were similar in both treatment conditions, in which TBA could recover Aβ-induced ROS and Ca2+ levels. This indicates that TBA has both preventive and restorative ability for pathology of AD. However, we observed a little increasing of Ca2+ in TBA-alone-pretreatment group unlike in posttreatment group, although it wasn’t severe increase as much as Aβ-alone-treated group.
We showed that ROS can regulate mitochondrial axonal transport mediated by Ca2+. There are reports that excessive ROS or Ca2+ disrupts mitochondrial axonal transport [14, 15]. However, how ROS alter mitochondrial axonal transport is unclear. Our results show that when Aβ-induced ROS was blocked by ROS inhibitors or increased acetylation of Prx1 by HDAC6 inhibitor, Ca2+ level decreased, and rescue of mitochondrial axonal transport followed. It is reported that Ca2+ regulates mitochondrial axonal transport by modulating the interaction between mitochondria and motor proteins through Miro, which undergoes conformational changes as Ca2+ binds to it [15, 52]. Thus, we revealed for the first time that Ca2+ is a key mediator of ROS-induced mitochondrial axonal transport deficit.
Although ROS increase Ca2+ level by facilitating Ca2+ release from the ER or mitochondria, it is well-known that excessive Ca2+ can also elevate ROS by causing mitochondrial dysfunction [13, 31, 53, 54]. Consistent with previous reports, we showed that reduction of Aβ-induced Ca2+ by BAPTA decreased ROS levels (Additional file 5). Considering that Aβ-induced ROS elevate Ca2+, and that Ca2+ also elevates ROS, a vicious cycle is formed. This cyclic nature suggests that mitochondrial axonal transport might be very susceptible to AD.
In this study, we investigated that the elevation of acetylation of Prx1 by HDAC6 inhibitor partially rescues increased ROS level in the presence of Aβ. Only partial recovery was achieved possibly due to other redox regulatory systems, which remain disrupted by Aβ, such as superoxide dismutase-2, glutaredoxin 1 and thioredoxin 1 . The precise mechanism needs to be further studied.
We demonstrated a novel mechanism: mediated by restoring ROS and Ca2+ level in the presence of Aβ, increased acetylation of Prx1 by HDAC6 inhibitor rescues impaired mitochondrial axonal transport. This indicates the new role of Prx1 in regulating mitochondrial axonal transport which is downstream of HDAC6 and the new role of HDAC6 in restoring Aβ-induced oxidative stress and disrupted Ca2+ homeostasis. Therefore, HDAC6 inhibition might be a strong therapeutic strategy for AD.
2′, 7′-dichlorodihydrofluorescein diacetate
Day in vitro
Histone deacetylase 6
Reactive oxygen species
We thank Dr. Sang Won Kang for a generous gift of Prx1-Flag vector.
This research was supported by grants from NRF (2015R1A2A1A05001794, 2014M3C7A1046047, 2015M3C7A1028790 and MRC (2012R1A5A2A44671346)) for I.M-J.
HC designed the research, performed cloning, primary neuronal culture, cell culture, western blot analyses, DCFDA and Fluo-4 assays and immunohistochemical analyses, and drafted the manuscript. HJK contributed to develop antibodies and carried out mitochondrial transport analyses, primary neuronal culture, genotyping, TBA injection to mice, and immunohistochemical analyses. JK designed the research, performed cloning, DCFDA and Fluo-4 analyses, mitochondrial transport analyses, and primary neuronal culture. SK and JC carried out developing antibodies. JY served intellectual contribution about experiments. WL performed genotyping, and TBA injection to mice. YP and D-SL contributed to immunohistochemical analysis of human brain samples. SJH and HR gifted human brain samples and contributed to immunohistochemical analysis of human brain samples. IM-J designed the research, brought intellectual feedback, participated in interpretation of data and drafted manuscript. All authors have read and approved the final manuscript.
The authors declare that they have no competing interests.
Availability of data and materials
All data generated or analyzed during this study are included in this published article and its supplementary information files.
Consent for publication
Ethics approval and consent to participate
Neuropathological processing of normal and AD human brain samples followed the procedures previously established for the Boston University Alzheimer’s Disease Center (BUADC). Next of kin provided informed consent for participation and brain donation. The study was performed in accordance with principles of human subject protection in the Declaration of Helsinki. This study was reviewed by the Boston University School of Medicine Institutional Review Board and was approved as exempt because the study involves only tissue collected from post-mortem, and consequently not classified as human subjects. Animals were treated and maintained as per the Helsinki Treaty, the Principles of Laboratory Animal Care (NIH publication No. 85–23, revised 1985), and the Animal Care and Use Guidelines of Seoul National University, Seoul, Korea. All experimental procedures were reviewed and approved by the Institutional Animal Care and Use Committee (IACUC) of Seoul National University.
Open AccessThis article is distributed under the terms of the Creative Commons Attribution 4.0 International License (http://creativecommons.org/licenses/by/4.0/), which permits unrestricted use, distribution, and reproduction in any medium, provided you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons license, and indicate if changes were made. The Creative Commons Public Domain Dedication waiver (http://creativecommons.org/publicdomain/zero/1.0/) applies to the data made available in this article, unless otherwise stated.
- Querfurth HW, LaFerla FM. Alzheimer’s disease. N Engl J Med. 2010;362:329–44.View ArticlePubMedGoogle Scholar
- Kumar A, Singh A, Ekavali. A review on Alzheimer’s disease pathophysiology and its management: an update. Pharmacol Rep. 2015;67:195–203.View ArticlePubMedGoogle Scholar
- Millecamps S, Julien JP. Axonal transport deficits and neurodegenerative diseases. Nat Rev Neurosci. 2013;14:161–76.View ArticlePubMedGoogle Scholar
- Rui Y, Tiwari P, Xie Z, Zheng JQ. Acute impairment of mitochondrial trafficking by beta-amyloid peptides in hippocampal neurons. J Neurosci. 2006;26:10480–7.View ArticlePubMedGoogle Scholar
- Perlson E, Maday S, Fu MM, Moughamian AJ, Holzbaur EL. Retrograde axonal transport: pathways to cell death? Trends Neurosci. 2010;33:335–44.View ArticlePubMedPubMed CentralGoogle Scholar
- Calkins MJ, Reddy PH. Amyloid beta impairs mitochondrial anterograde transport and degenerates synapses in Alzheimer’s disease neurons. Biochim Biophys Acta. 2011;1812:507–13.View ArticlePubMedPubMed CentralGoogle Scholar
- Maday S, Twelvetrees AE, Moughamian AJ, Holzbaur EL. Axonal transport: cargo-specific mechanisms of motility and regulation. Neuron. 2014;84:292–309.View ArticlePubMedPubMed CentralGoogle Scholar
- Huang WJ, Zhang X, Chen WW. Role of oxidative stress in Alzheimer’s disease. Biomed Rep. 2016;4:519–22.PubMedPubMed CentralGoogle Scholar
- Jomova K, Vondrakova D, Lawson M, Valko M. Metals, oxidative stress and neurodegenerative disorders. Mol Cell Biochem. 2010;345:91–104.View ArticlePubMedGoogle Scholar
- Fleming JL, Phiel CJ, Toland AE. The role for oxidative stress in aberrant DNA methylation in Alzheimer’s disease. Curr Alzheimer Res. 2012;9:1077–96.View ArticlePubMedGoogle Scholar
- Jin SM, Cho HJ, Jung ES, Shim MY, Mook-Jung I. DNA damage-inducing agents elicit gamma-secretase activation mediated by oxidative stress. Cell Death Differ. 2008;15:1375–84.View ArticlePubMedGoogle Scholar
- Kuchibhotla KV, Goldman ST, Lattarulo CR, Wu HY, Hyman BT, Bacskai BJ. Abeta plaques lead to aberrant regulation of calcium homeostasis in vivo resulting in structural and functional disruption of neuronal networks. Neuron. 2008;59:214–25.View ArticlePubMedPubMed CentralGoogle Scholar
- Bezprozvanny I. Calcium signaling and neurodegenerative diseases. Trends Mol Med. 2009;15:89–100.View ArticlePubMedPubMed CentralGoogle Scholar
- Fang C, Bourdette D, Banker G. Oxidative stress inhibits axonal transport: implications for neurodegenerative diseases. Mol Neurodegener. 2012;7:29.View ArticlePubMedPubMed CentralGoogle Scholar
- Wang X, Schwarz TL. The mechanism of Ca2 + − dependent regulation of kinesin-mediated mitochondrial motility. Cell. 2009;136:163–74.View ArticlePubMedPubMed CentralGoogle Scholar
- Ding H, Dolan PJ, Johnson GV. Histone deacetylase 6 interacts with the microtubule-associated protein tau. J Neurochem. 2008;106:2119–30.View ArticlePubMedPubMed CentralGoogle Scholar
- Hempen B, Brion JP. Reduction of acetylated alpha-tubulin immunoreactivity in neurofibrillary tangle-bearing neurons in Alzheimer’s disease. J Neuropathol Exp Neurol. 1996;55:964–72.View ArticlePubMedGoogle Scholar
- Hubbert C, Guardiola A, Shao R, Kawaguchi Y, Ito A, Nixon A, Yoshida M, Wang XF, Yao TP. HDAC6 is a microtubule-associated deacetylase. Nature. 2002;417:455–8.View ArticlePubMedGoogle Scholar
- Parmigiani RB, Xu WS, Venta-Perez G, Erdjument-Bromage H, Yaneva M, Tempst P, Marks PA. HDAC6 is a specific deacetylase of peroxiredoxins and is involved in redox regulation. Proc Natl Acad Sci U S A. 2008;105:9633–8.View ArticlePubMedPubMed CentralGoogle Scholar
- d’Ydewalle C, Bogaert E, Van Den Bosch L. HDAC6 at the intersection of neuroprotection and neurodegeneration. Traffic. 2012;13:771–9.View ArticlePubMedGoogle Scholar
- Govindarajan N, Rao P, Burkhardt S, Sananbenesi F, Schluter OM, Bradke F, Lu J, Fischer A. Reducing HDAC6 ameliorates cognitive deficits in a mouse model for Alzheimer’s disease. EMBO Mol Med. 2013;5:52–63.View ArticlePubMedGoogle Scholar
- Majid T, Griffin D, Criss Z, Jarpe M, Pautler RG. Pharmocologic treatment with histone deacetylase 6 inhibitor (ACY-738) recovers Alzheimer’s disease phenotype in amyloid precursor protein/presenilin 1 (APP/PS1) mice. Alzheimers Dement. 2015;1:170–81.Google Scholar
- Zhang L, Liu C, Wu J, Tao JJ, Sui XL, Yao ZG, Xu YF, Huang L, Zhu H, Sheng SL, Qin C. Tubastatin A/ACY-1215 improves cognition in Alzheimer’s disease transgenic mice. J Alzheimers Dis. 2014;41:1193–205.PubMedGoogle Scholar
- Kim C, Choi H, Jung ES, Lee W, Oh S, Jeon NL, Mook-Jung I. HDAC6 inhibitor blocks amyloid beta-induced impairment of mitochondrial transport in hippocampal neurons. PLoS One. 2012;7:e42983.View ArticlePubMedPubMed CentralGoogle Scholar
- Cha MY, Cho HJ, Kim C, Jung YO, Kang MJ, Murray ME, Hong HS, Choi YJ, Choi H, Kim DK, et al. Mitochondrial ATP synthase activity is impaired by suppressed O-GlcNAcylation in Alzheimer’s disease. Hum Mol Genet. 2015;24:6492–504.View ArticlePubMedPubMed CentralGoogle Scholar
- Barbas CF, Burton DR, Scott JK, Silverman GJ. Phage display. New York: CSHL Press; 2004.
- Park S, Lee DH, Park JG, Lee YT, Chung J. A sensitive enzyme immunoassay for measuring cotinine in passive smokers. Clin Chim Acta. 2010;411:1238–42.View ArticlePubMedGoogle Scholar
- Camara AK, Bienengraeber M, Stowe DF. Mitochondrial approaches to protect against cardiac ischemia and reperfusion injury. Front Physiol. 2011;2:13.View ArticlePubMedPubMed CentralGoogle Scholar
- Hidalgo C, Bull R, Behrens MI, Donoso P. Redox regulation of RyR-mediated Ca2+ release in muscle and neurons. Biol Res. 2004;37:539–52.PubMedGoogle Scholar
- Gorlach A, Bertram K, Hudecova S, Krizanova O. Calcium and ROS: a mutual interplay. Redox Biol. 2015;6:260–71.View ArticlePubMedPubMed CentralGoogle Scholar
- Zhao Y, Zhao B. Oxidative stress and the pathogenesis of Alzheimer’s disease. Oxid Med Cell Longev. 2013;2013:316523.PubMedPubMed CentralGoogle Scholar
- Nunomura A, Perry G, Pappolla MA, Wade R, Hirai K, Chiba S, Smith MA. RNA oxidation is a prominent feature of vulnerable neurons in Alzheimer’s disease. J Neurosci. 1999;19:1959–64.PubMedGoogle Scholar
- Markesbery WR, Lovell MA. Four-hydroxynonenal, a product of lipid peroxidation, is increased in the brain in Alzheimer’s disease. Neurobiol Aging. 1998;19:33–6.View ArticlePubMedGoogle Scholar
- Dompierre JP, Godin JD, Charrin BC, Cordelieres FP, King SJ, Humbert S, Saudou F. Histone deacetylase 6 inhibition compensates for the transport deficit in Huntington’s disease by increasing tubulin acetylation. J Neurosci. 2007;27:3571–83.View ArticlePubMedGoogle Scholar
- Reed NA, Cai D, Blasius TL, Jih GT, Meyhofer E, Gaertig J, Verhey KJ. Microtubule acetylation promotes kinesin-1 binding and transport. Curr Biol. 2006;16:2166–72.View ArticlePubMedGoogle Scholar
- Li G, Jiang H, Chang M, Xie H, Hu L. HDAC6 alpha-tubulin deacetylase: a potential therapeutic target in neurodegenerative diseases. J Neurol Sci. 2011;304:1–8.View ArticlePubMedGoogle Scholar
- Matsuyama A, Shimazu T, Sumida Y, Saito A, Yoshimatsu Y, Seigneurin-Berny D, Osada H, Komatsu Y, Nishino N, Khochbin S, et al. In vivo destabilization of dynamic microtubules by HDAC6-mediated deacetylation. EMBO J. 2002;21:6820–31.View ArticlePubMedPubMed CentralGoogle Scholar
- Kim SH, Fountoulakis M, Cairns N, Lubec G. Protein levels of human peroxiredoxin subtypes in brains of patients with Alzheimer’s disease and Down syndrome. J Neural Transm Suppl. 2001;(61):223–235.
- Chang RY, Etheridge N, Dodd PR, Nouwens AS. Targeted quantitative analysis of synaptic proteins in Alzheimer’s disease brain. Neurochem Int. 2014;75:66–75.View ArticlePubMedGoogle Scholar
- Selenica ML, Benner L, Housley SB, Manchec B, Lee DC, Nash KR, Kalin J, Bergman JA, Kozikowski A, Gordon MN, Morgan D. Histone deacetylase 6 inhibition improves memory and reduces total tau levels in a mouse model of tau deposition. Alzheimers Res Ther. 2014;6:12.View ArticlePubMedPubMed CentralGoogle Scholar
- Vicario-Orri E, Opazo CM, Munoz FJ. The pathophysiology of axonal transport in Alzheimer’s disease. J Alzheimers Dis. 2015;43:1097–113.PubMedGoogle Scholar
- Murakami K, Murata N, Noda Y, Tahara S, Kaneko T, Kinoshita N, Hatsuta H, Murayama S, Barnham KJ, Irie K, et al. SOD1 (copper/zinc superoxide dismutase) deficiency drives amyloid beta protein oligomerization and memory loss in mouse model of Alzheimer disease. J Biol Chem. 2011;286:44557–68.View ArticlePubMedPubMed CentralGoogle Scholar
- Oda A, Tamaoka A, Araki W. Oxidative stress up-regulates presenilin 1 in lipid rafts in neuronal cells. J Neurosci Res. 2010;88:1137–45.PubMedGoogle Scholar
- Madeo J. The Role of Oxidative Stress in Alzheimer ’s Disease. J Alzheimers Dis Parkinsonism. 2013;03:116.
- Torres LL, Quaglio NB, de Souza GT, Garcia RT, Dati LM, Moreira WL, Loureiro AP, de Souza-Talarico JN, Smid J, Porto CS, et al. Peripheral oxidative stress biomarkers in mild cognitive impairment and Alzheimer’s disease. J Alzheimers Dis. 2011;26:59–68.PubMedGoogle Scholar
- Trinchese F, Fa M, Liu S, Zhang H, Hidalgo A, Schmidt SD, Yamaguchi H, Yoshii N, Mathews PM, Nixon RA, Arancio O. Inhibition of calpains improves memory and synaptic transmission in a mouse model of Alzheimer disease. J Clin Invest. 2008;118:2796–807.View ArticlePubMedPubMed CentralGoogle Scholar
- Son SM, Byun J, Roh SE, Kim SJ, Mook-Jung I. Reduced IRE1alpha mediates apoptotic cell death by disrupting calcium homeostasis via the InsP3 receptor. Cell Death Dis. 2014;5:e1188.View ArticlePubMedPubMed CentralGoogle Scholar
- Palop JJ, Jones B, Kekonius L, Chin J, Yu GQ, Raber J, Masliah E, Mucke L. Neuronal depletion of calcium-dependent proteins in the dentate gyrus is tightly linked to Alzheimer’s disease-related cognitive deficits. Proc Natl Acad Sci U S A. 2003;100:9572–7.View ArticlePubMedPubMed CentralGoogle Scholar
- Kook SY, Jeong H, Kang MJ, Park R, Shin HJ, Han SH, Son SM, Song H, Baik SH, Moon M, et al. Crucial role of calbindin-D28k in the pathogenesis of Alzheimer’s disease mouse model. Cell Death Differ. 2014;21:1575–87.View ArticlePubMedPubMed CentralGoogle Scholar
- Kamal A, Almenar-Queralt A, LeBlanc JF, Roberts EA, Goldstein LS. Kinesin-mediated axonal transport of a membrane compartment containing beta-secretase and presenilin-1 requires APP. Nature. 2001;414:643–8.View ArticlePubMedGoogle Scholar
- Kim GH, Kim JE, Rhie SJ, Yoon S. The role of oxidative stress in neurodegenerative diseases. Exp Neurobiol. 2015;24:325–40.View ArticlePubMedPubMed CentralGoogle Scholar
- Stephen TL, Gupta-Agarwal S, Kittler JT. Mitochondrial dynamics in astrocytes. Biochem Soc Trans. 2014;42:1302–10.View ArticlePubMedGoogle Scholar
- Hidalgo C, Carrasco MA, Munoz P, Nunez MT. A role for reactive oxygen/nitrogen species and iron on neuronal synaptic plasticity. Antioxid Redox Signal. 2007;9:245–55.View ArticlePubMedGoogle Scholar
- Sanmartin CD, Paula-Lima AC, Garcia A, Barattini P, Hartel S, Nunez MT, Hidalgo C. Ryanodine receptor-mediated Ca(2+) release underlies iron-induced mitochondrial fission and stimulates mitochondrial Ca(2+) uptake in primary hippocampal neurons. Front Mol Neurosci. 2014;7:13.PubMedPubMed CentralGoogle Scholar
- Massaad CA, Klann E. Reactive oxygen species in the regulation of synaptic plasticity and memory. Antioxid Redox Signal. 2011;14:2013–54.View ArticlePubMedPubMed CentralGoogle Scholar