Abstract
Interest in the role of ‘epigenetic’ modifications in learning and memory processes has escalated rapidly in recent years, due, in part, to the promise of answering long-standing basic science questions about how memories are acquired, stored and maintained over time in the brain. Epigenetic mechanisms, including modifications of chromatin structure and DNA methylation, have long been studied in the context of developmental biology. Recent studies, however, have shown that many of these same mechanisms are conserved in the adult nervous system, where they continue to influence gene expression in the context of long-lasting behavioral change. Within the field of memory research, it has recently been suggested that environmentally-driven alterations in epigenetic processes may represent an ideal candidate mechanism for long-term memory storage and maintenance. In this chapter, I review the role of both chromatin modifications and DNA methylation in several different forms of mammalian memory and associated synaptic plasticity, including a discussion of their involvement in distinct memory-related processes such as consolidation, reconsolidation and extinction. The study of epigenetics in the context of memory holds potential promise for the treatment of neurological conditions that are characterized by memory impairment, as well as psychological conditions such as drug addiction and post-traumatic stress disorder (PTSD) that are characterized by persistent unwanted memories.
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References
Alarcon JM, Malleret G, Touzani K, Vronskaya S, Ishii S, Kandel ER, Barco A (2004) Chromatin acetylation, memory, and LTP are impaired in CBP+/− mice: a model for the cognitive deficit in Rubinstein-Taybi syndrome and its amelioration. Neuron 42(6):947–959
Alberini CM (2005) Mechanisms of memory stabilization: are consolidation and reconsolidation similar or distinct processes? Trends Neurosci 28(1):51–56
Barco A, Bailey CH, Kandel ER (2006) Common molecular mechanisms in explicit and implicit memory. J Neurochem 97(6):1520–1533
Barrett RM, Wood MA (2008) Beyond transcription factors: the role of chromatin modifying enzymes in regulating transcription required for memory. Learn Mem 15(7):460–467
Barrett RM, Malvaez M, Kramar E, Matheos DP, Arrizon A, Cabrera SM, Lynch G, Greene RW, Wood MA (2011) Hippocampal focal knockout of CBP affects specific histone modifications, long-term potentiation, and long-term memory. Neuropsychopharmacology 36(8):1545–1556
Ben Mamou C, Gamache K, Nader K (2006) NMDA receptors are critical for unleashing consolidated auditory fear memories. Nat Neurosci 9(10):1237–1239
Berman DE, Hazvi S, Rosenblum K, Seger R, Dudai Y (1998) Specific and differential activation of mitogen-activated protein kinase cascades by unfamiliar taste in the insular cortex of the behaving rat. J Neurosci 18(23):10037–10044
Berman DE, Hazvi S, Neduva V, Dudai Y (2000) The role of identified neurotransmitter systems in the response of insular cortex to unfamiliar taste: activation of ERK1-2 and formation of a memory trace. J Neurosci 20(18):7017–7023
Bredy TW, Barad M (2008) The histone deacetylase inhibitor valproic acid enhances acquisition, extinction, and reconsolidation of conditioned fear. Learn Mem 15(1):39–45
Broide RS, Redwine JM, Aftahi N, Young W, Bloom FE, Winrow CJ (2007) Distribution of histone deacetylases 1–11 in the rat brain. J Mol Neurosci 31:47–58
Chahrour M, Jung SY, Shaw C, Zhou X, Wong ST, Qin J, Zoghbi HY (2008) MeCP2, a key contributor to neurological disease, activates and represses transcription. Science 320(5880):1224–1229
Da Silva WC, Bonini JS, Bevilaqua LR, Medina JH, Izquierdo I, Cammarota M (2008) Inhibition of mRNA synthesis in the hippocampus impairs consolidation and reconsolidation of spatial memory. Hippocampus 18(1):29–39
Day JJ, Sweatt JD (2010) DNA methylation and memory formation. Nat Neurosci 13(11):1319–1323
Day JJ, Sweatt JD (2011a) Cognitive neuroepigenetics: a role for epigenetic mechanisms in learning and memory. Neurobiol Learn Mem 96(1):2–12
Day JJ, Sweatt JD (2011b) Epigenetic mechanisms in cognition. Neuron 70(5):813–829
Day JJ, Sweatt JD (2011c) Epigenetic modifications in neurons are essential for formation and storage of behavioral memory. Neuropsychopharmacology 36(1):357–358
Dudai Y, Eisenberg M (2004) Rites of passage of the engram: reconsolidation and the lingering consolidation hypothesis. Neuron 44(1):93–100
Duvarci S, Nader K (2004) Characterization of fear memory reconsolidation. J Neurosci 24(42):9269–9275
Duvarci S, Nader K, LeDoux JE (2005) Activation of extracellular signal-regulated kinase-mitogen-activated protein kinase cascade in the amygdala is required for memory reconsolidation of auditory fear conditioning. Eur J Neurosci 21(1):283–289
Duvarci S, Nader K, LeDoux JE (2008) De novo mRNA synthesis is required for both consolidation and reconsolidation of fear memories in the amygdala. Learn Mem 15(10):747–755
Federman N, Fustinana MS, Romano A (2009) Histone acetylation is recruited in consolidation as a molecular feature of stronger memories. Learn Mem 16(10):600–606
Feng J, Zhou Y, Campbell SL, Le T, Li E, Sweatt JD, Silva AJ, Fan G (2010) Dnmt1 and Dnmt3a maintain DNA methylation and regulate synaptic function in adult forebrain neurons. Nat Neurosci 13(4):423–430
Fischer A, Sananbenesi F, Mungenast A, Tsai LH (2010) Targeting the correct HDAC(s) to treat cognitive disorders. Trends Pharmacol Sci 31(12):605–617
Frankland PW, Bontempi B (2005) The organization of recent and remote memories. Nat Rev Neurosci 6(2):119–130
Frankland PW, Bontempi B, Talton LE, Kaczmarek L, Silva AJ (2004) The involvement of the anterior cingulate cortex in remote contextual fear memory. Science 304(5672):881–883
Fujita Y, Morinobu S, Takei S, Fuchikami M, Matsumoto T, Yamamoto S, Yamawaki S (2012) Vorinostat, a histone deacetylase inhibitor, facilitates fear extinction and enhances expression of the hippocampal NR2B-containing NMDA receptor gene. J Psychiatr Res 46(5):635–643
Guan JS, Haggarty SJ, Giacometti E, Dannenberg JH, Joseph N, Gao J, Nieland TJ, Zhou Y, Wang X, Mazitschek R, Bradner JE, DePinho RA, Jaenisch R, Tsai LH (2009) HDAC2 negatively regulates memory formation and synaptic plasticity. Nature 459(7243):55–60
Gupta S, Kim SY, Artis S, Molfese DL, Schumacher A, Sweatt JD, Paylor RE, Lubin FD (2010) Histone methylation regulates memory formation. J Neurosci 30(10):3589–3599
Han J, Li Y, Wang D, Wei C, Yang X, Sui N (2010) Effect of 5-aza-2-deoxycytidine microinjecting into hippocampus and prelimbic cortex on acquisition and retrieval of cocaine-induced place preference in C57BL/6 mice. Eur J Pharmacol 642(1–3):93–98
Itzhak Y, Anderson KL, Kelley JB, Petkov M (2012) Histone acetylation rescues contextual fear conditioning in nNOS KO mice and accelerates extinction of cued fear conditioning in wild type mice. Neurobiol Learn Mem 97(4):409–417
Jiang Y, Langley B, Lubin FD, Renthal W, Wood MA, Yasui DH, Kumar A, Nestler EJ, Akbarian S, Beckel-Mitchener AC (2008) Epigenetics in the nervous system. J Neurosci 28(46):11753–11759
Kida S, Josselyn SA, de Ortiz SP, Kogan JH, Chevere I, Masushige S, Silva AJ (2002) CREB required for the stability of new and reactivated fear memories. Nat Neurosci 5(4):348–355
Kim JJ, Fanselow MS (1992) Modality-specific retrograde amnesia of fear. Science 256(5057):675–677
Korzus E, Rosenfeld MG, Mayford M (2004) CBP histone acetyltransferase activity is a critical component of memory consolidation. Neuron 42(6):961–972
Kosik KS, Rapp PR, Raz N, Small SA, Sweatt JD, Tsai LH (2012) Mechanisms of age-related cognitive change and targets for intervention: epigenetics. J Gerontol A Biol Sci Med Sci 67(7):741–746
Kouzarides T (2007) Chromatin modifications and their function. Cell 128(4):693–705
Lattal KM, Barrett RM, Wood MA (2007) Systemic or intrahippocampal delivery of histone deacetylase inhibitors facilitates fear extinction. Behav Neurosci 121(5):1125–1131
Lee JL, Di Ciano P, Thomas KL, Everitt BJ (2005) Disrupting reconsolidation of drug memories reduces cocaine-seeking behavior. Neuron 47(6):795–801
Levenson JM, Sweatt JD (2005) Epigenetic mechanisms in memory formation. Nat Rev Neurosci 6(2):108–118
Levenson JM, O’Riordan KJ, Brown KD, Trinh MA, Molfese DL, Sweatt JD (2004) Regulation of histone acetylation during memory formation in the hippocampus. J Biol Chem 279(39):40545–40559
Levenson JM, Roth TL, Lubin FD, Miller CA, Huang IC, Desai P, Malone LM, Sweatt JD (2006) Evidence that DNA (cytosine-5) methyltransferase regulates synaptic plasticity in the hippocampus. J Biol Chem 281(23):15763–15773
Likhtik E, Popa D, Apergis-Schoute J, Fidacaro GA, Pare D (2008) Amygdala intercalated neurons are required for expression of fear extinction. Nature 454(7204):642–645
Loftus EF (1979) The malleability of human memory. Am Sci 67(3):312–320
Loftus EF (2005) Planting misinformation in the human mind: a 30-year investigation of the malleability of memory. Learn Mem 12(4):361–366
Lubin FD, Sweatt JD (2007) The IkappaB kinase regulates chromatin structure during reconsolidation of conditioned fear memories. Neuron 55(6):942–957
Lubin FD, Roth TL, Sweatt JD (2008) Epigenetic regulation of BDNF gene transcription in the consolidation of fear memory. J Neurosci 28(42):10576–10586
Maddox SA, Schafe GE (2011a) The activity-regulated cytoskeletal-associated protein (Arc/Arg3.1) is required for reconsolidation of a Pavlovian fear memory. J Neurosci 31(19):7073–7082
Maddox SA, Schafe GE (2011b) Epigenetic alterations in the lateral amygdala are required for reconsolidation of a Pavlovian fear memory. Learn Mem 18(9):579–593
Maddox SA, Monsey MS, Schafe GE (2011) Early growth response gene 1 (Egr-1) is required for new and reactivated fear memories in the lateral amygdala. Learn Mem 18(1):24–38
Maddox SA, Watts CS, Schafe GE (2013a) p300/CBP histone acetyltransferase activity is required for newly acquired and reactivated fear memories in the lateral amygdala. Learn Mem 20(2):109–119
Maddox SA, Watts CW, Schafe GE (2013b) A naturally-occurring histone acetyltransferase inhibitor derived from Garcinia indica impairs newly acquired and reactivated fear memories. PLoS One 8(1), e54463
Maddox SA, Watts CS, Schafe GE (2014) DNA methyltransferase activity is required for memory-related neural plasticity in the lateral amygdala. Neurobiol Learn Mem 107:93–100
Malkani S, Rosen JB (2000) Specific induction of early growth response gene 1 in the lateral nucleus of the amygdala following contextual fear conditioning in rats. Neuroscience 97(4):693–702
Malkani S, Wallace KJ, Donley MP, Rosen JB (2004) An egr-1 (zif268) antisense oligodeoxynucleotide infused into the amygdala disrupts fear conditioning. Learn Mem 11(5):617–624
Marek R, Coelho CM, Sullivan RK, Baker-Andresen D, Li X, Ratnu V, Dudley KJ, Meyers D, Mukherjee C, Cole PA, Sah P, Bredy TW (2011) Paradoxical enhancement of fear extinction memory and synaptic plasticity by inhibition of the histone acetyltransferase p300. J Neurosci 31(20):7486–7491
Martin C, Zhang Y (2005) The diverse functions of histone lysine methylation. Nat Rev Mol Cell Biol 6(11):838–849
Milad MR, Quirk GJ (2002) Neurons in medial prefrontal cortex signal memory for fear extinction. Nature 420(6911):70–74
Milad MR, Rauch SL, Pitman RK, Quirk GJ (2006) Fear extinction in rats: implications for human brain imaging and anxiety disorders. Biol Psychol 73(1):61–71
Miller CA, Sweatt JD (2007) Covalent modification of DNA regulates memory formation. Neuron 53(6):857–869
Miller CA, Campbell SL, Sweatt JD (2008) DNA methylation and histone acetylation work in concert to regulate memory formation and synaptic plasticity. Neurobiol Learn Mem 89(4):599–603
Miller CA, Gavin CF, White JA, Parrish RR, Honasoge A, Yancey CR, Rivera IM, Rubio MD, Rumbaugh G, Sweatt JD (2010) Cortical DNA methylation maintains remote memory. Nat Neurosci 13(6):664–666
Milner B, Squire LR, Kandel ER (1998) Cognitive neuroscience and the study of memory. Neuron 20(3):445–468
Milton AL, Lee JL, Butler VJ, Gardner R, Everitt BJ (2008) Intra-amygdala and systemic antagonism of NMDA receptors prevents the reconsolidation of drug-associated memory and impairs subsequently both novel and previously acquired drug-seeking behaviors. J Neurosci 28(33):8230–8237
Miranda TB, Jones PA (2007) DNA methylation: the nuts and bolts of repression. J Cell Physiol 213(2):384–390
Mizuno K, Dempster E, Mill J, Giese KP (2012) Long-lasting regulation of hippocampal Bdnf gene transcription after contextual fear conditioning. Genes Brain Behav 11:651–659
Monsey MS, Ota KT, Akingbade IF, Hong ES, Schafe GE (2011) Epigenetic alterations are critical for fear memory consolidation and synaptic plasticity in the lateral amygdala. PLoS One 6(5), e19958
Myers KM, Davis M (2007) Mechanisms of fear extinction. Mol Psychiatry 12(2):120–150
Nader K (2003) Memory traces unbound. Trends Neurosci 26(2):65–72
Nader K, Schafe GE, Le Doux JE (2000) Fear memories require protein synthesis in the amygdala for reconsolidation after retrieval. Nature 406(6797):722–726
Oike Y, Hata A, Mamiya T, Kaname T, Noda Y, Suzuki M, Yasue H, Nabeshima T, Araki K, Yamamura K (1999) Truncated CBP protein leads to classical Rubinstein-Taybi syndrome phenotypes in mice: implications for a dominant-negative mechanism. Hum Mol Genet 8(3):387–396
Oliveira AM, Wood MA, McDonough CB, Abel T (2007) Transgenic mice expressing an inhibitory truncated form of p300 exhibit long-term memory deficits. Learn Mem 14(9):564–572
Oliveira AM, Estevez MA, Hawk JD, Grimes S, Brindle PK, Abel T (2011) Subregion-specific p300 conditional knock-out mice exhibit long-term memory impairments. Learn Mem 18(3):161–169
Parsons RG, Gafford GM, Baruch DE, Riedner BA, Helmstetter FJ (2006) Long-term stability of fear memory depends on the synthesis of protein but not mRNA in the amygdala. Eur J Neurosci 23(7):1853–1859
Pavlov IP (1927) Conditioned reflexes. Oxford University Press, London
Penke Z, Morice E, Veyrac A, Gros A, Chagneau C, LeBlanc P, Samson N, Baumgartel K, Mansuy IM, Davis S, Laroche S (2014) Zif268/Egr1 gain of function facilitates hippocampal synaptic plasticity and long-term spatial recognition memory. Philos Trans R Soc Lond B Biol Sci 369(1633):20130159
Peters J, Dieppa-Perea LM, Melendez LM, Quirk GJ (2010) Induction of fear extinction with hippocampal-infralimbic BDNF. Science 328(5983):1288–1290
Pitman RK, Shalev AY, Orr SP (2000) Posttraumatic stress disorder: emotion, conditioning, & memory. In: Gazzaniga MS (ed) The new cognitive neurosciences. MIT Press, Cambridge
Poirier R, Cheval H, Mailhes C, Garel S, Charnay P, Davis S, Laroche S (2008) Distinct functions of egr gene family members in cognitive processes. Front Neurosci 2(1):47–55
Quirk GJ, Likhtik E, Pelletier JG, Pare D (2003) Stimulation of medial prefrontal cortex decreases the responsiveness of central amygdala output neurons. J Neurosci 23(25):8800–8807
Razin A (1998) CpG methylation, chromatin structure and gene silencing-a three-way connection. EMBO J 17(17):4905–4908
Renthal W, Nestler EJ (2008) Epigenetic mechanisms in drug addiction. Trends Mol Med 14(8):341–350
Robleto K, Poulos AM, Thompson RF (2004) Brain mechanisms of extinction of the classically conditioned eyeblink response. Learn Mem 11(5):517–524
Rosenblum K, Meiri N, Dudai Y (1993) Taste memory: the role of protein synthesis in gustatory cortex. Behav Neural Biol 59(1):49–56
Roth TL, Sweatt JD (2009) Regulation of chromatin structure in memory formation. Curr Opin Neurobiol 19(3):336–342
Rudenko A, Tsai LH (2014a) Epigenetic modifications in the nervous system and their impact upon cognitive impairments. Neuropharmacology 80:70–82
Rudenko A, Tsai LH (2014b) Epigenetic regulation in memory and cognitive disorders. Neuroscience 264:51–63
Santini E, Ge H, Ren K, Pena de Ortiz S, Quirk GJ (2004) Consolidation of fear extinction requires protein synthesis in the medial prefrontal cortex. J Neurosci 24(25):5704–5710
Sara SJ (2000) Retrieval and reconsolidation: toward a neurobiology of remembering. Learn Mem 7(2):73–84
Schafe GE (2014) Epigenetics: a new frontier for post-traumatic stress disorder? Epigenomics 6(2):157–159
Siedlecki P, Zielenkiewicz P (2006) Mammalian DNA methyltransferases. Acta Biochim Pol 53(2):245–256
Sims RJ 3rd, Nishioka K, Reinberg D (2003) Histone lysine methylation: a signature for chromatin function. Trends Genet 19(11):629–639
Sparks FT, Spanswick SC, Lehmann H, Sutherland RJ (2013) Neither time nor number of context-shock pairings affect long-term dependence of memory on hippocampus. Neurobiol Learn Mem 106:309–315
Stafford JM, Raybuck JD, Ryabinin AE, Lattal KM (2012) Increasing histone acetylation in the hippocampus-infralimbic network enhances fear extinction. Biol Psychiatry 72(1):25–33
Stefanko DP, Barrett RM, Ly AR, Reolon GK, Wood MA (2009) Modulation of long-term memory for object recognition via HDAC inhibition. Proc Natl Acad Sci U S A 106(23):9447–9452
Swank MW, Sweatt JD (2001) Increased histone acetyltransferase and lysine acetyltransferase activity and biphasic activation of the ERK/RSK cascade in insular cortex during novel taste learning. J Neurosci 21(10):3383–3391
Tronson NC, Taylor JR (2007) Molecular mechanisms of memory reconsolidation. Nat Rev Neurosci 8(4):262–275
Tronson NC, Wiseman SL, Olausson P, Taylor JR (2006) Bidirectional behavioral plasticity of memory reconsolidation depends on amygdalar protein kinase A. Nat Neurosci 9(2):167–169
Tsankova N, Renthal W, Kumar A, Nestler EJ (2007) Epigenetic regulation in psychiatric disorders. Nat Rev Neurosci 8(5):355–367
Turner BM (2002) Cellular memory and the histone code. Cell 111(3):285–291
Valor LM, Pulopulos MM, Jimenez-Minchan M, Olivares R, Lutz B, Barco A (2011) Ablation of CBP in forebrain principal neurons causes modest memory and transcriptional defects and a dramatic reduction of histone acetylation but does not affect cell viability. J Neurosci 31(5):1652–1663
Varga-Weisz PD, Becker PB (1998) Chromatin-remodeling factors: machines that regulate? Curr Opin Cell Biol 10(3):346–353
Vecsey CG, Hawk JD, Lattal KM, Stein JM, Fabian SA, Attner MA, Cabrera SM, McDonough CB, Brindle PK, Abel T, Wood MA (2007) Histone deacetylase inhibitors enhance memory and synaptic plasticity via CREB: CBP-dependent transcriptional activation. J Neurosci 27(23):6128–6140
Wang L, Tang Y, Cole PA, Marmorstein R (2008) Structure and chemistry of the p300/CBP and Rtt109 histone acetyltransferases: implications for histone acetyltransferase evolution and function. Curr Opin Struct Biol 18(6):741–747
Wei W, Coelho CM, Li X, Marek R, Yan S, Anderson S, Meyers D, Mukherjee C, Sbardella G, Castellano S, Milite C, Rotili D, Mai A, Cole PA, Sah P, Kobor MS, Bredy TW (2012) p300/CBP-associated factor selectively regulates the extinction of conditioned fear. J Neurosci 32(35):11930–11941
Wood MA, Kaplan MP, Park A, Blanchard EJ, Oliveira AM, Lombardi TL, Abel T (2005) Transgenic mice expressing a truncated form of CREB-binding protein (CBP) exhibit deficits in hippocampal synaptic plasticity and memory storage. Learn Mem 12(2):111–119
Wood MA, Attner MA, Oliveira AM, Brindle PK, Abel T (2006) A transcription factor-binding domain of the coactivator CBP is essential for long-term memory and the expression of specific target genes. Learn Mem 13(5):609–617
Yang XJ, Seto E (2007) HATs and HDACs: from structure, function and regulation to novel strategies for therapy and prevention. Oncogene 26(37):5310–5318
Yeh SH, Lin CH, Gean PW (2004) Acetylation of nuclear factor-kappaB in rat amygdala improves long-term but not short-term retention of fear memory. Mol Pharmacol 65(5):1286–1292
Zhao Z, Fan L, Frick KM (2010) Epigenetic alterations regulate estradiol-induced enhancement of memory consolidation. Proc Natl Acad Sci U S A 107(12):5605–5610
Zhao Z, Fan L, Fortress AM, Boulware MI, Frick KM (2012) Hippocampal histone acetylation regulates object recognition and the estradiol-induced enhancement of object recognition. J Neurosci 32(7):2344–2351
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Schafe, G.E. (2016). Epigenetics and Memory. In: Giese, K., Radwanska, K. (eds) Novel Mechanisms of Memory. Springer, Cham. https://doi.org/10.1007/978-3-319-24364-1_8
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