Epigenetics - LSUHSC Human Development Center

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DNA methylation turns genes on or off• Non-methylated or hypomethylatedDNA sequences are usuallyexpressed• Highly methylated(hypermethylated) DNA sequencesare usually not expressedGeneHypo-MethylationHyper-MethylationTherefore,↑ DNA methylation, ↓gene expression↓ DNA methylation, ↑ gene expression
DNA methyl groups can directly interfere withbinding of transcription factors to DNAAn untwisted double strand of DNAshowing several cytosine sequencesmethylated on both strands.3-D model of DNA with methyl groups inred.
Page 1: EpigeneticsFern Tsien, PhDDept. of
Page 5 and 6: Genomic imprinting
Page 7 and 8: Human Genomic Imprinting Map
Page 9 and 10: Genomic imprinting• Is necessary
Page 11 and 12: Pipetfertilized oocyteremove 1 nucl
Page 13 and 14: fertilized oocyte• Double-materna
Page 15 and 16: CONCLUSIONCompletion of embryogenes
Page 17 and 18: What controls epigenetics andgenomi
Page 19 and 20: ImprintestablishmentandpropagationI
Page 21: DNA MethylationCCDNA methylation re
Page 25 and 26: DNA Methylation and CancerAbnormal
Page 27 and 28: DNA Methylation and CancerAbnormal
Page 29 and 30: Chromatin:DNA, Histones,and non-his
Page 31 and 32: Compaction of DNA• Histone protei
Page 33 and 34: HDAC inhibitors (HDI)• Trichostat
Page 35 and 36: Human Imprinting Map
Page 37 and 38: Angelman syndrome -AS• ‘Happy P
Page 39 and 40: Pathogenic mechanisms in PWS and AS
Page 41 and 42: Angelman syndromeIIIASP15PWSASPWS +
Page 43 and 44: How can epigenetics affectYOU????
Page 45 and 46: Epigenetics and environment• Phar
Page 47 and 48: Environment• A growing number of
Page 49 and 50: Identical twins:• Same genotype
Page 51 and 52: Epigenetics•These are two identic
Page 53: Thank you!!!!

Epigenetics - LSUHSC Human Development Center

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