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Lanzillotta C, Prestia F, Greco V, Iavarone F, Cordella F, Sette C, Forte E, Tramutola A, Lanzillotta S, Cassano T, Di Angelantonio S, Urbani A, Barone E, Perluigi M, Di Domenico F. Enhancing protein O-GlcNAcylation in down syndrome mice mitigates memory dysfunctions through the rescue of mitochondrial bioenergetics, stress responses and pathological markers. Redox biology 2025 85 40684658
Abstract:
Disturbances of the single sugar modification of proteins, O-GlcNAc, have been identified as a potential connection between disrupted brain metabolism and intellectual decay. In Alzheimer disease (AD), the reduced uptake of glucose in the brain results in aberrant O-GlcNAc cycling contributing to redox imbalance and neurodegeneration. Notably, alterations of O-GlcNAc homeostasis, associated with impaired O-GlcNAc transferase (OGT)/O-GlcNAcase (OGA) regulation, foster neuropathological mechanisms characterized by the presence of AD hallmarks in Down syndrome (DS) models. In the present study we examined the ability of Thiamet G (TMG), a well-known OGA inhibitor, in improving bio-energetic processes, inducing stress responses, reducing AD-related signatures and ameliorating cognition in a murine model of DS. Our data demonstrate that short-term intranasal administration of TMG restored OGA activity and normalized the global O-GlcNAc profile in mouse cortices. By a proteomic approach we identified protein components whose increased O-GlcNAc levels rescue, resulted to brain molecular and cognitive improvements. Remarkably, these included elements involved in energy production, neuronal architecture, antioxidant and stress response mechanisms. The ability of TMG in rescuing O-GlcNAc cycle and metabolic changes, associated with improved mitochondrial activity in cortical tissue, was further accompanied by changes in the O-GlcNAc/phospho ratio of APP and Tau. Functional improvements translated in enhanced recognition memory in Ts2Cje mice. Our study highlights the pivotal role of altered protein O-GlcNAcylation in DS neuropathology and establishes the molecular basis to envision the O-GlcNAc process as a promising therapeutic target to mitigate genetic- and metabolism-driven brain alterations linked to redox imbalance, mitochondrial failure and the development of AD features.
Species: Mus musculus
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Huynh VN, Wang S, Ouyang X, Wani WY, Johnson MS, Chacko BK, Jegga AG, Qian WJ, Chatham JC, Darley-Usmar VM, Zhang J. Defining the Dynamic Regulation of O-GlcNAc Proteome in the Mouse Cortex---the O-GlcNAcylation of Synaptic and Trafficking Proteins Related to Neurodegenerative Diseases. Frontiers in aging 2021 2 35822049
Abstract:
O-linked conjugation of ß-N-acetyl-glucosamine (O-GlcNAc) to serine and threonine residues is a post-translational modification process that senses nutrient availability and cellular stress and regulates diverse biological processes that are involved in neurodegenerative diseases and provide potential targets for therapeutics development. However, very little is known of the networks involved in the brain that are responsive to changes in the O-GlcNAc proteome. Pharmacological increase of protein O-GlcNAcylation by Thiamet G (TG) has been shown to decrease tau phosphorylation and neurotoxicity, and proposed as a therapy in Alzheimer's disease (AD). However, acute TG exposure impairs learning and memory, and protein O-GlcNAcylation is increased in the aging rat brain and in Parkinson's disease (PD) brains. To define the cortical O-GlcNAc proteome that responds to TG, we injected young adult mice with either saline or TG and performed mass spectrometry analysis for detection of O-GlcNAcylated peptides. This approach identified 506 unique peptides corresponding to 278 proteins that are O-GlcNAcylated. Of the 506 unique peptides, 85 peptides are elevated by > 1.5 fold in O-GlcNAcylation levels in response to TG. Using pathway analyses, we found TG-dependent enrichment of O-GlcNAcylated synaptic proteins, trafficking, Notch/Wnt signaling, HDAC signaling, and circadian clock proteins. Significant changes in the O-GlcNAcylation of DNAJC6/AUXI, and PICALM, proteins that are risk factors for PD and/or AD respectively, were detected. We compared our study with two key prior O-GlcNAc proteome studies using mouse cerebral tissue and human AD brains. Among those identified to be increased by TG, 15 are also identified to be increased in human AD brains compared to control, including those involved in cytoskeleton, autophagy, chromatin organization and mitochondrial dysfunction. These studies provide insights regarding neurodegenerative diseases therapeutic targets.
O-GlcNAc proteins:
TANC2, AMRA1, CAMP1, SKT, AGRIN, KANL3, TTLL3, NHSL2, CTTB2, CCDC6, SHAN1, SYGP1, DPYL2, STXB1, CLOCK, NOTC2, VIAAT, CTND2, TPD53, REPS1, NLK, ACK1, SYUA, ATX2, PDLI1, ZFR, HCN1, BSN, TOM1, SYN1, GCR, EGR1, NFL, NFM, ATX1L, DERPC, KCC2A, CNTN1, HSPB1, MAP1B, G3P, ATF2, MTAP2, RS2, FOXK1, STAT3, AINX, EPB41, RFX1, LMNA, INPP, VATA, DVL1, CNBP, ATX1, NCAN, GOGA3, PTPA, GCP3, TB182, GMEB2, YTHD1, PI5PA, MRTFB, LIPA3, NACAM, TNIK, WNK1, NPTN, NEO1, S30BP, ZEP1, APOC2, EMAL1, RELCH, PRC2C, YETS2, FUBP2, QRIC1, LIMC1, DAB2P, ZEP2, AAK1, TNR6A, FCHO2, DRC1, SRBS2, GRM5, PACS2, OXR1, PHAR4, LIN54, MLIP, UNKL, SMG7, RBM27, CYFP2, SYNRG, SRC8, SKIL, NCOR1, LAMA5, HCFC1, P3C2A, SAP, APC, TOB1, AP180, FXR1, HS71A, LASP1, MAFK, M3K7, TAF6, ASPP1, SRBS1, DBNL, SH3G1, TLE4, IF4G2, MINT, ZYX, NUP62, OMGP, TFE3, SYN2, TBR1, RBL2, SBNO1, SLAI1, PKP4, SH3R1, JHD2C, ABLM3, ARMX2, LAR4B, HELZ, S23IP, RBM26, BCR, AHDC1, PAPD7, MFF, KMT2D, ERC2, NFRKB, WDFY3, GGYF2, TEX2, CNOT1, IF2A, PICAL, PLPR3, PRC2B, C2CD5, TPPP, ATX2L, MAP6, NAV3, AUXI, RIMB2, AVL9, NU214, AP4E1, UBP2L, C2C2L, IF4G3, ZN598, SHAN2, LPP, MYPT2, PHIPL, TB10B, CCD40, ZC3HE, DLGP2, ZC21A, BAIP2, EMSY, CLAP2, LIPA2, SRRM2, PAMR1, GEPH, YTHD3, POGZ, EPC2, SI1L1, RBM14, HYCC2, ANK2, CDAN1, SYNPO, VCIP1, TAB1, MEF2C, F193A, OGT1, EP400, EPN2, P66A, PDLI5, GTPBA, ZBT20, RTN1, BRD3, AGFG1, ABLM1, MRTFA, DC1L1, SPART, RFIP5, NUP35, WASF1, SC6A8, SGIP1, AGAP3, P66B, TAF9, WDR13, LRP5, UBAP2, BASP1, DCP1A, SYUB, TRFE, TRIM7, CIC, S12A6, GORS2, TAB2, EPN4, RNF34, ANR17, NECP1, FLIP1, ROA0, RBM33, TPD54, ODO2, DLGP1, FIP1, TM263, PLIN3, LNEBL, KC1D, NBEA, INP4A, RIMS2, RBP2, RTN3, NUDT3, ATR, ADRM1, FMN2, NCOA6, SON, ULK2, ADDA, MAGD1, MAP1A, GRM3, PCLO, GAB1, FBX6, NPAS3, GUAD, NCOR2, ATRN, NFAT5, DEMA, E41L3, SLIT3, CARM1, DYR1B, MECP2, E41L1, HDAC6
Species: Mus musculus
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Trinidad JC, Barkan DT, Gulledge BF, Thalhammer A, Sali A, Schoepfer R, Burlingame AL. Global identification and characterization of both O-GlcNAcylation and phosphorylation at the murine synapse. Molecular & cellular proteomics : MCP 2012 11(8) 22645316
Abstract:
O-linked N-acetylglucosamine (O-GlcNAc) is a dynamic, reversible monosaccharide modifier of serine and threonine residues on intracellular protein domains. Crosstalk between O-GlcNAcylation and phosphorylation has been hypothesized. Here, we identified over 1750 and 16,500 sites of O-GlcNAcylation and phosphorylation from murine synaptosomes, respectively. In total, 135 (7%) of all O-GlcNAcylation sites were also found to be sites of phosphorylation. Although many proteins were extensively phosphorylated and minimally O-GlcNAcylated, proteins found to be extensively O-GlcNAcylated were almost always phosphorylated to a similar or greater extent, indicating the O-GlcNAcylation system is specifically targeting a subset of the proteome that is also phosphorylated. Both PTMs usually occur on disordered regions of protein structure, within which, the location of O-GlcNAcylation and phosphorylation is virtually random with respect to each other, suggesting that negative crosstalk at the structural level is not a common phenomenon. As a class, protein kinases are found to be more extensively O-GlcNAcylated than proteins in general, indicating the potential for crosstalk of phosphorylation with O-GlcNAcylation via regulation of enzymatic activity.
O-GlcNAc proteins:
A0JNY3, A2A653, A2A654, TANC2, ZEP3, MA7D2, CKAP5, CAMP1, LZTS3, A2AJ19, AJM1, MA7D1, A2ALK6, RPGP1, UBR4, A2AP92, SKT, ANR63, A2ATK9, A2AUD5, A2BI30, A6H6J9, A6MDD2, A8DUV1, B1AQX6, B1AR09, GRIK3, B1ATI9, B1AWT3, NHSL2, FRS1L, UBP24, DLGP4, B2RQ57, B2RQ80, PYR1, B2RQL0, B2RQQ5, GNAI1, B2RUE8, OTU7B, B2RWX1, B6ZHC4, B6ZHC5, B7ZCA7, B7ZMP8, B7ZNA4, B7ZNF6, B7ZWM6, B9EHE8, CTTB2, B9EKL9, PTPRZ, D1FNM8, D3YU59, D3YWX2, DGKH, D3YXR8, PGBD5, SHAN1, D3Z0V7, D3Z2J5, D9HP81, E0CYT1, E9PUA3, E9PUC4, DGKD, E9PUR0, E9PV14, E9PV26, KI67, E9PWL1, E9PWM3, E9PY55, E9PZP8, E9Q1M1, E9Q2B2, E9Q3D6, NU153, E9Q3M9, E9Q4N6, E9Q616, E9Q6T8, E9Q6Y8, NUMA1, E9Q828, E9Q9I2, E9Q9J6, E9QA16, E9QAP7, E9QAR5, SC16A, E9QJU8, E9QMJ1, SYGP1, RFIP2, HXK2, CAN2, SC22B, DPYL2, STXB1, TCOF, DCTN1, GLU2B, EF2K, PRDX4, AIP, NUMBL, GSTO1, GSH0, M3K5, PSMD4, DHX15, NPC1, BMPR2, VIAAT, BCAT2, CTND2, PITM1, CSK22, REPS1, ACK1, SLK, CAC1B, PGRC1, IMPA1, SYUA, AKA7A, STRN, RL35A, AT2A2, PGAM2, ATX2, NMT1, E41L2, GPX4, EMC8, DHB12, HCN4, KDM6A, ZN326, SORL, GRPE2, KLC1, ZFR, O88568, HCN2, HCN1, BSN, TOM1, RPP30, DNJB5, COX1, HA1D, HBA, K2C1, MBP, ALDOA, PGFRB, LDHA, G6PI, ENPP1, NEUM, ANXA2, RIR1, HS90A, EGR1, MDHM, KCC4, NFL, NFM, GNAI2, PDIA1, NUCL, CADH1, RC3H2, LRC4B, IGS11, DERPC, UBB, IFI5B, IFI4, ANXA1, EF1A1, H2B1F, PARP1, HS90B, DMD, KCC2A, TCPA, A4, COX5A, GELS, UMPS, NCAM1, GPDA, MDHC, SRP54, RLA0, GLNA, H12, LEG1, DDX3L, SPTN1, AP2A2, TPIS, KS6A3, COF1, GNAO, NFH, SERPH, VIME, MTAP2, EIF3A, CBX3, IMDH2, MCM3, CTNA1, MAP4, GNA12, GNA13, PDIA3, PSB8, NCKP1, PABP1, FKBP4, HMGB2, AIMP1, LA, ACM4, SYWC, RANG, RAB5C, RAB18, CALX, PRDX1, RL12, PPM1B, DNLI1, CAP1, STAT3, PURA, OPRM, TCPQ, CX6A1, MSH2, H14, H11, ALDR, ALD2, CBP, AINX, NEDD4, RP3A, CAPZB, SRPRB, RL36, SOX2, HS74L, ADT1, ROA1, INPP, PCY1A, MCM4, CSRP3, RAB7A, CDN2A, HDGF, ADT2, IMA1, UBP10, KPYM, RIDA, HMGA2, RL10A, CCHL, SOX1, RAB2A, ATX1, CACB3, HMCS2, GOGA3, ATPK, ATPB, ACTN4, IDI1, ACOT8, PTPA, KCNN2, KCNN3, TB10A, TB182, SF3B6, MRTFB, DOCK4, MYPR, EIF3E, PCBP1, LIPA3, ACTB, IF4A1, SNP25, RAB10, CSN2, RRAS2, PRS8, RS15A, 1433E, RS18, RS11, SMD1, ABI2, EF1A2, ACTA, VATB2, RL23, RS24, GBB1, HSP7C, TCTP, GNAS2, 1433Z, HMGB1, IF5A1, ACTG, RS17, RS12, UB2L3, RACK1, ACTS, TBA4A, TBA1A, TBB4B, PLXA2, DCC, EBP, NFIX, EM55, HNRH2, NCOA1, ELAV1, RGRF2, USP9X, TCPB, TCPE, TCPZ, NUCB2, IRS2, WNK1, RL36A, CSRP1, SEPR, RS3A, DPYL1, MPRIP, CAC1A, ATP5J, BOP1, RS5, WBP2, CXAR, PLPL9, G3BP1, RBBP6, CDS1, TBB5, IL6RB, NMDE2, NMDE3, TOP2A, NOTC1, NDKB, AQP1, UBA1, CTNB1, S30BP, NFIA, NUCB1, MARK3, APLP1, ENAH, ATPA, TF65, YES, MARK2, PGBM, PYC, CAPR2, EMAL1, LARP7, BAX, CNN2, LYAR, CHD8, CNNM1, INF2, TT21B, Q0IJ77, TRIO, VGF, TANC1, CDK12, Q14B66, MA6D1, NSUN2, MCM9, PHAR1, PSD3, Q2Q7P0, FILA2, Q3TAD4, NB5R4, GUAA, METK2, PRC2C, Q3TRG3, PLPL6, K22E, YETS2, Q3TY93, FUBP2, F117B, Q3U882, LBR, TM109, FOXK2, Q3UFK1, Q3UGZ4, TNR6C, DAB2P, ZEP2, AAK1, Q3UHT7, DTX3L, EDC4, PARP3, WASC4, GRIN1, Q3UQ23, SRBS2, THSD4, MRCKA, SPRY3, KSR2, GRM5, TBCD9, LRRF1, ARMX5, STOX2, SHAN3, UBN1, OXR1, DDX17, PHAR4, ANR28, ZN608, Q571B7, PRAG1, TAB3, Q58DZ3, IQEC2, Q5DU62, AAPK1, NUFP2, UNKL, SMG7, RBM27, CYFP2, TM1L2, PSME4, ANR40, Q5SUH6, GGNB2, SYNRG, Q5SVJ0, RPGP2, TBC9B, ACACA, Q5SXC4, Q5XJV5, LMTK3, RN123, ZDHC8, SRC8, MYL6, SKI, SAMH1, IRGM1, CLD11, NPT2A, SPB6, VDAC2, VDAC3, VDAC1, STYX, RBBP4, ASNS, NCOA2, LAP2A, PPM1G, ASTN1, PRDX2, HCFC1, APC, KCNA4, AP180, FXR1, GDIB, GRID2, GRID1, CBX5, SERA, LASP1, NPM, PCBP2, M3K7, SRBS1, DBNL, SH3G1, CYTB, IF4G2, MINT, ZYX, RALY, TFE3, Q640L6, AR13B, HECAM, NPDC1, SYN2, TBR1, ISG15, ABCG1, ATP4A, MRC2, G3PT, PTN13, TPP2, CTNA3, SBNO1, BEGIN, K1549, GIT1, SLAI1, PKP4, PEAK1, CDK13, SH3R1, MYOF, ABLM3, ARMX2, CE170, LAR4B, NOP58, Q6GR78, TPM4, NIPBL, RRP5, FBX41, Q6NVA3, RPRD2, WWC2, ZN532, Q6NXW0, S23IP, SMHD1, NEST, CSKI1, Q6P9N8, MTSS2, AHDC1, PTN23, TRAK1, SRSF1, CHD4, DLGP3, NUP98, NYAP1, KCC2D, AT1A3, AT1A2, NFRKB, RIGI, MAGI1, WDFY3, TACC1, GGYF2, PF21A, KDM3B, CNOT1, LARP1, Q6ZQB7, NU188, Q6ZQJ9, Q6ZQK4, RS9, RL10, IF2A, SC6A5, SEM6D, 2AAA, EEIG1, MTCH2, PICAL, MRO2B, SCN4B, PLPR4, HNRPQ, TBB2A, SMAP2, Q7TNS5, PLPR3, MBB1A, LNP, TPPP, ATX2L, OTUB1, EXOS3, MAP6, ELP1, SI1L2, LRRC7, ERBIN, PHF24, R3HD2, NAV3, AGRL3, Q80TS6, AUXI, MADD, AVL9, PUM1, UBP8, NU214, SEPT9, NAA15, CAMP3, FA98B, TDRKH, EPN1, TMCC2, AGFG2, UBP2L, Q80X68, C2C2L, FLNB, LRRT4, WNK3, PRIC2, CNKR2, ZN598, SHAN2, AGRB3, Q80ZX0, ZFYV1, MAST4, RHG32, ENTP3, LPP, PEF1, ACTBL, TET3, MYPT2, IF4B, SYAC, F168A, TBL1R, TB10B, CSTP1, CARF, TGO1, FRM4A, SYIM, ANS1B, DLGP2, ZNT6, RCC2, ABLM2, LSS, UNC80, NOE2, CF015, EMSY, ODP2, GGA3, SYLC, DMXL2, IMP2L, CLAP2, LIPA2, ASPH, CNOT4, FLNA, F163B, GEPH, CREST, KCC1D, PGES2, KANK2, GEMI5, IFFO1, OSBL6, YTHD3, TM266, POGZ, LACC1, MAP1S, A16L1, SI1L1, PP4R4, MYO9A, THOP1, RBM14, Q8C2R1, CNOT2, Q8C6E9, CC134, ANK2, ELFN1, DIDO1, NHSL1, WDR37, DCTN4, SYNPO, BCAS3, VCIP1, Q8CE98, TAB1, SCYL2, NED4L, SYEP, F193A, GNAL, OGT1, NAV1, SYNJ1, RPGF2, EP400, PHC3, P66A, TBCE, VWF, STAU2, LIN7A, TBC23, ZBT20, RTN1, HS12A, DNM1L, UNC5B, UNC5A, ANLN, AGFG1, MATR3, Q8K314, AHI1, NDUS8, I2BPL, PREP, ABLM1, EIF3L, ERF3A, HNRPL, IQEC1, DOCK7, DC1L1, SPART, BST2, RFIP5, AT2A1, NUP35, LUZP1, MAVS, MYH9, PARN, AT1A1, SIR2, SNRK, ZDHC5, CC50A, AMOT, AGAP3, MARK1, Q8VHM5, FLNC, SFPQ, CPIN1, WDR13, BACH, S12A5, RAB14, ACLY, MIC25, ATPG, DDX1, SH3L3, UBAP2, NCOA5, CSDE1, FRS3, ZFN2B, DLG2, PTBP2, SRGP1, TMLH, DYST, SYUB, ELOV6, ALS2, TADBP, TBB6, CLIP1, LRC59, K2C5, UBXN1, SIR1, SPRE1, PAWR, MED1, MEP50, STML2, UBP11, NONO, RRAGC, VMA5A, MAOM, DCTN2, NEUA, DDAH2, DNJA3, TRXR3, RB6I2, SRRT, DSRAD, Q99NC2, RIMS1, ANR17, NU155, NTRI, RRBP1, ZN318, TRI33, ATP5L, RL17, GLOD4, DUT, SDHB, GLRX3, IFM3, NECP1, OCAD1, RRP44, TBB2B, DDAH1, YIF1B, ROA0, NIP7, MPPB, CYBP, RL11, TECR, CHTOP, SERB1, QCR1, NNRD, GARS, TOM70, RS19, SYRC, CNDP2, TMEDA, ODO2, DLGP1, TBB4A, IDH3A, IPYR, RL37, FIP1, TIM50, EF1G, RM17, GSDMD, DDA1, F135B, TM263, CNN3, PLIN3, PGAM1, XRN2, MYPT1, DJC10, KC1D, GNAI3, PUR6, S38A3, NDUBA, CRIP2, TSC1, RAI14, NBEA, TCF20, SORC2, DPYL5, TBB3, RBP2, ARHG7, RTN3, SPN90, RBCC1, PSMG2, DDX24, CLD12, PALLD, ELF2, TMOD3, NUDT3, COPB, NUP50, DDX21, TULP4, FLII, RPF2, CCG3, TBA8, IQGA1, NECT1, ADRM1, FMN2, PALS1, DCLK1, BAG3, CUL3, MINK1, REEP6, TRXR1, SYGP1, SON, APBB1, DREB, SPY2, MACF1, ULK2, ZBP1, TOM40, ADDA, GOGA5, DNJB1, MAP1A, PCLO, GAB1, RIPK3, NPAS3, SH2D3, NUBP2, ZEB2, SYT7, DEST, TEBP, SRS10, RPGR, PR40A, KHDR3, TPSN, CDYL, KAD2, TEN1, PDC6I, CHIP, IF4H, COR1B, COR1C, TNIP1, GANP, ARC, MPP2, SHAN1, VAPA, GSK3B, DEMA, E41L3, JIP1, GBP2, CAD20, P5CS, LAT1, DYR1B, MD2L1, SAE2, APCL, SYVC, MTMR1, MECP2, E41L1, SUCB1, HDAC6, GRIA4, HOME1, OSB10
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