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PMID |
Sentence |
1 |
10640275
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Transcriptional repression mediated by corepressors N-CoR and SMRT is a critical function of nuclear hormone receptors, and is dysregulated in human myeloid leukemias.
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2 |
10640275
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Surprisingly, however, numerous biochemical studies have not detected N-CoR or SMRT in mSin3- and HDAC1-containing complexes.
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3 |
10640275
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Here we show that these RDs are nonredundant, and that one RD, which is conserved in N-CoR and SMRT, represses transcription by interacting directly with class II HDAC4 and HDAC5.
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4 |
10640275
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Endogenous N-CoR and SMRT each associate with HDAC4 in a complex that does not contain mSin3A or HDAC1.
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5 |
10640275
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Transcriptional repression mediated by corepressors N-CoR and SMRT is a critical function of nuclear hormone receptors, and is dysregulated in human myeloid leukemias.
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6 |
10640275
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Surprisingly, however, numerous biochemical studies have not detected N-CoR or SMRT in mSin3- and HDAC1-containing complexes.
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7 |
10640275
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Here we show that these RDs are nonredundant, and that one RD, which is conserved in N-CoR and SMRT, represses transcription by interacting directly with class II HDAC4 and HDAC5.
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8 |
10640275
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Endogenous N-CoR and SMRT each associate with HDAC4 in a complex that does not contain mSin3A or HDAC1.
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9 |
12861000
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The N-CoR/histone deacetylase 3 complex is required for repression by thyroid hormone receptor.
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10 |
12861000
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Nuclear receptor corepressors (N-CoR) and silencing mediator for retinoid and thyroid receptors (SMRT) have both been implicated in thyroid hormone receptor (TR)-mediated repression.
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11 |
12861000
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Here we show that endogenous N-CoR, TBL1, and histone deacetylase 3 (HDAC3), but not HDAC1, -2, or -4, are recruited to a stably integrated reporter gene repressed by unliganded TR as well as the orphan receptor RevErb.
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12 |
12861000
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Knockdown of N-CoR using small interfering RNAs markedly reduces repression by the TR ligand binding domain in human 293T cells, whereas knockdown of SMRT has little effect.
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13 |
12861000
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Knockdown of HDAC3 markedly reduces repression by both TR and RevErb, while knockdown of HDAC1 or 2 has more modest, partly nonspecific effects.
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14 |
12861000
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Thus, HDAC3 is critical for repression by multiple nuclear receptors and the N-CoR HDAC3 complex plays a unique and necessary role in TR-mediated gene repression in human 293T cells.
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15 |
12861000
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The N-CoR/histone deacetylase 3 complex is required for repression by thyroid hormone receptor.
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16 |
12861000
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Nuclear receptor corepressors (N-CoR) and silencing mediator for retinoid and thyroid receptors (SMRT) have both been implicated in thyroid hormone receptor (TR)-mediated repression.
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17 |
12861000
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Here we show that endogenous N-CoR, TBL1, and histone deacetylase 3 (HDAC3), but not HDAC1, -2, or -4, are recruited to a stably integrated reporter gene repressed by unliganded TR as well as the orphan receptor RevErb.
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18 |
12861000
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Knockdown of N-CoR using small interfering RNAs markedly reduces repression by the TR ligand binding domain in human 293T cells, whereas knockdown of SMRT has little effect.
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19 |
12861000
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Knockdown of HDAC3 markedly reduces repression by both TR and RevErb, while knockdown of HDAC1 or 2 has more modest, partly nonspecific effects.
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20 |
12861000
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Thus, HDAC3 is critical for repression by multiple nuclear receptors and the N-CoR HDAC3 complex plays a unique and necessary role in TR-mediated gene repression in human 293T cells.
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21 |
16644691
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NFATc4 and ATF3 negatively regulate adiponectin gene expression in 3T3-L1 adipocytes.
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22 |
16644691
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Expression of adiponectin decreases with obesity and insulin resistance.
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23 |
16644691
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The binding of NFATc4 to the promoter was associated with increased recruitment of histone deacetylase 1 and reduced acetylation of histone H3 at the promoter site.
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24 |
16644691
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In addition, binding of activating transcription factor 3 (ATF3) to the putative activator protein-1 site located adjacent to the NFAT binding site also repressed the promoter activity.
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25 |
16644691
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Importantly, the binding activities of NFATc4 and ATF3, increased significantly in white adipose tissues of ob/ob and db/db mice compared with controls.
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26 |
16644691
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Taken together, this study demonstrates for the first time that NFATc4 and ATF3 function as negative regulators of adiponectin gene expression, which may play critical roles in downregulating adiponectin expression in obesity and type 2 diabetes.
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27 |
17468742
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The histone H3K4 demethylase SMCX links REST target genes to X-linked mental retardation.
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28 |
17468742
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An SMCX complex isolated from HeLa cells contains additional chromatin modifiers (the histone deacetylases HDAC1 and HDAC2, and the histone H3K9 methyltransferase G9a) and the transcriptional repressor REST, suggesting a direct role for SMCX in chromatin dynamics and REST-mediated repression.
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29 |
17468742
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Chromatin immunoprecipitation reveals that SMCX and REST co-occupy the neuron-restrictive silencing elements in the promoters of a subset of REST target genes.
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30 |
17468742
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RNA-interference-mediated depletion of SMCX derepresses several of these targets and simultaneously increases H3K4 trimethylation at the sodium channel type 2A (SCN2A) and synapsin I (SYN1) promoters.
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31 |
17468742
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We propose that loss of SMCX activity impairs REST-mediated neuronal gene regulation, thereby contributing to SMCX-associated X-linked mental retardation.
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32 |
18385463
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Hepatic insulin resistance induced by prenatal alcohol exposure is associated with reduced PTEN and TRB3 acetylation in adult rat offspring.
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33 |
18385463
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We performed an intraperitoneal pyruvate tolerance test, determined the phosphorylation status of hepatic phosphoinositide-dependent protein kinase-1 (PDK1), Akt, and PKCzeta before and after intravenous insulin bolus, and measured mRNA and in vivo acetylation of TRB3 (tribbles 3) and PTEN (phosphatase and tensin homolog deleted on chromosome ten) as well as the expression of the histone acetylase (HAT) PCAF (p300/CREB-binding protein-associated factor), histone deacetylase-1 (HDAC1), and HAT and HDAC activities.
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34 |
18385463
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In EtOH compared with pair-fed and control offspring, basal and pyruvate-induced blood glucose was increased, insulin-induced PDK1, Akt, and PKCzeta phosphorylation was reduced, and expression of PTEN and TRB3 was increased while their acetylation status was decreased in association with increased HDAC and decreased HAT activities.
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35 |
18385463
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Thus female adult rats prenatally exposed to EtOH have increased gluconeogenesis, reduced insulin signaling, and increased PTEN and TRB3 expression in the liver.
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36 |
18385463
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In addition, PTEN and TRB3 are hypoacetylated, which can contribute to Akt-inhibiting activity.
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37 |
18385463
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These results suggest that hepatic insulin resistance in rats prenatally exposed to EtOH is explained, at least in part, by increased PTEN and TRB3 activity due to both increased gene expression and reduced acetylation.
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38 |
18464933
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The fetal IUGR state was characterized by loss of USF-1 binding at the proximal promoter of Pdx1, recruitment of the histone deacetylase 1 (HDAC1) and the corepressor Sin3A, and deacetylation of histones H3 and H4.
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39 |
18464933
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During the neonatal period, these epigenetic changes and the reduction in Pdx1 expression could be reversed by HDAC inhibition.
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40 |
19275684
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The enzymes which regulate this modification are described as histone acetyltransferases or HATs, and histone deacetylases or HDACs [1].
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41 |
19553350
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Histone deacetylase-2 is a key regulator of diabetes- and transforming growth factor-beta1-induced renal injury.
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42 |
19553350
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This study examined the effect of HDAC inhibition on renal fibrosis induced by diabetes or transforming growth factor (TGF)-beta1 and determined the role of reactive oxygen species (ROS) as mediators of HDAC activation.
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43 |
19553350
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Among the six HDACs tested (HDAC-1 through -5 and HDAC-8), HDAC-2 activity significantly increased in the kidneys of STZ-induced diabetic rats and db/db mice and TGF-beta1-treated NRK52-E cells.
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44 |
19553350
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Levels of mRNA expression of fibronectin and alpha-smooth muscle actin were decreased, whereas E-cadherin mRNA was increased when HDAC-2 was knocked down using RNA interference in NRK52-E cells.
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45 |
20564224
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Activities of histone deacetylase (HDAC) and histone acetyltransferase (HAT), and histone acetylation were quantified.
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46 |
20564224
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Hyperglycemia activated HDAC and increased HDAC1, 2, and 8 gene expressions in the retina and its capillary cells.
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47 |
20564224
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Termination of hyperglycemia failed to provide any benefits to diabetes-induced changes in retinal HDAC and HAT, and histone H3 remained subnormal.
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48 |
20633551
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High levels of glucose induce apoptosis in cardiomyocyte via epigenetic regulation of the insulin-like growth factor receptor.
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49 |
20633551
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We investigate whether HG-induced repression of insulin-like growth factor 1 receptor (IGF-1R) mediated by epigenetic modifications is one potential mechanism.
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50 |
20633551
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We found that HG resulted in decreased IGF-1 receptor (IGF-1R) mRNA levels, and IGF-1R protein when compared with H9C2 rat cardiomyocyte cells incubated in normal glucose.
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51 |
20633551
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The effects of HG on reduced expression of IGF-1R and increased apoptosis were blocked by silencing p53 with small interference RNA but not by non-targeting scrambled siRNA.
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52 |
20633551
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Moreover, HG negatively regulated IGF-1R promoter activity as determined by ChIP analysis, which was dependent on p53 since siRNA-p53 attenuated the effects of HG on IGF-1R promoter activity.
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53 |
20633551
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HG also increased the association of p53 with histone deacetylase 1 (HDAC1), and decreased the association of acetylated histone-4 with the IGF-1R promoter.
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54 |
20633551
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Furthermore, HDAC inhibitor relieved the repression of IGF-1R following HG state.
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55 |
20633551
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These results suggest that HG-induced repression of IGF-1R is mediated by the association of p53 with the IGF-1R promoter, and by the subsequent enhanced recruitment of chromatin-modifying proteins, such as HDAC1, to the IGF-1R promoter-p53 complex.
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56 |
20633551
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In conclusion, our data demonstrate that HG decreases expression of IGF-1R and decreases the association of acetylated histone-4 with the IGF-1R promoter.
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57 |
20633551
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High levels of glucose induce apoptosis in cardiomyocyte via epigenetic regulation of the insulin-like growth factor receptor.
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58 |
20633551
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We investigate whether HG-induced repression of insulin-like growth factor 1 receptor (IGF-1R) mediated by epigenetic modifications is one potential mechanism.
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59 |
20633551
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We found that HG resulted in decreased IGF-1 receptor (IGF-1R) mRNA levels, and IGF-1R protein when compared with H9C2 rat cardiomyocyte cells incubated in normal glucose.
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60 |
20633551
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The effects of HG on reduced expression of IGF-1R and increased apoptosis were blocked by silencing p53 with small interference RNA but not by non-targeting scrambled siRNA.
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61 |
20633551
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Moreover, HG negatively regulated IGF-1R promoter activity as determined by ChIP analysis, which was dependent on p53 since siRNA-p53 attenuated the effects of HG on IGF-1R promoter activity.
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62 |
20633551
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HG also increased the association of p53 with histone deacetylase 1 (HDAC1), and decreased the association of acetylated histone-4 with the IGF-1R promoter.
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63 |
20633551
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Furthermore, HDAC inhibitor relieved the repression of IGF-1R following HG state.
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64 |
20633551
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These results suggest that HG-induced repression of IGF-1R is mediated by the association of p53 with the IGF-1R promoter, and by the subsequent enhanced recruitment of chromatin-modifying proteins, such as HDAC1, to the IGF-1R promoter-p53 complex.
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65 |
20633551
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In conclusion, our data demonstrate that HG decreases expression of IGF-1R and decreases the association of acetylated histone-4 with the IGF-1R promoter.
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66 |
22056672
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In this study, we demonstrate that Nkx2.2 is part of a large repression complex in pancreatic β cells that includes DNMT3a, Grg3, and HDAC1.
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67 |
22056672
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Mutation of the endogenous Nkx2.2 tinman (TN) domain in mice abolishes the interaction between Nkx2.2 and Grg3 and disrupts β-cell specification.
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68 |
22056672
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Furthermore, we demonstrate that Nkx2.2 preferentially recruits Grg3 and HDAC1 to the methylated Aristaless homeobox gene (Arx) promoter in β cells.
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69 |
22056672
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The Nkx2.2 TN mutation results in ectopic expression of Arx in β cells, causing β-to-α-cell transdifferentiation.
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70 |
22056672
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Notably, subsequent removal of Arx in the β cells of Nkx2.2(TNmut/TNmut) mutant mice reverts the β-to-α-cell conversion, indicating that the repressor activities of Nkx2.2 on the methylated Arx promoter in β cells are the primary regulatory events required for maintaining β-cell identity.
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71 |
22056672
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In this study, we demonstrate that Nkx2.2 is part of a large repression complex in pancreatic β cells that includes DNMT3a, Grg3, and HDAC1.
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72 |
22056672
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Mutation of the endogenous Nkx2.2 tinman (TN) domain in mice abolishes the interaction between Nkx2.2 and Grg3 and disrupts β-cell specification.
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73 |
22056672
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Furthermore, we demonstrate that Nkx2.2 preferentially recruits Grg3 and HDAC1 to the methylated Aristaless homeobox gene (Arx) promoter in β cells.
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74 |
22056672
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The Nkx2.2 TN mutation results in ectopic expression of Arx in β cells, causing β-to-α-cell transdifferentiation.
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75 |
22056672
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Notably, subsequent removal of Arx in the β cells of Nkx2.2(TNmut/TNmut) mutant mice reverts the β-to-α-cell conversion, indicating that the repressor activities of Nkx2.2 on the methylated Arx promoter in β cells are the primary regulatory events required for maintaining β-cell identity.
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76 |
23235480
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Involvement of p300/CBP and epigenetic histone acetylation in TGF-β1-mediated gene transcription in mesangial cells.
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77 |
23235480
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Transforming growth factor-β1 (TGF-β1)-induced expression of plasminogen activator inhibitor-1 (PAI-1) and p21 in renal mesangial cells (MCs) plays a major role in glomerulosclerosis and hypertrophy, key events in the pathogenesis of diabetic nephropathy.
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78 |
23235480
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We evaluated the roles of histone acetylation, specific HATs, and HDACs in TGF-β1-induced gene expression in rat mesangial cells (RMCs) and in glomeruli from diabetic mice.
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79 |
23235480
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Overexpression of HATs CREB binding protein (CBP) or p300, but not p300/CBP-activating factor, significantly enhanced TGF-β1-induced PAI-1 and p21 mRNA levels as well as transactivation of their promoters in RMCs.
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80 |
23235480
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Conversely, they were significantly attenuated by HAT domain mutants of CBP and p300 or overexpression of HDAC-1 and HDAC-5.
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81 |
23235480
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Chromatin immunoprecipitation assays showed that TGF-β1 treatment led to a time-dependent enrichment of histone H3-lysine9/14-acetylation (H3K9/14Ac) and p300/CBP occupancies around Smad and Sp1 binding sites at the PAI-1 and p21 promoters.
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82 |
23235480
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TGF-β1 also enhanced the interaction of p300 with Smad2/3 and Sp1 and increased Smad2/3 acetylation.
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83 |
23235480
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High glucose-treated RMCs exhibited increased PAI-1 and p21 levels, and promoter H3K9/14Ac, which were blocked by TGF-β1 antibodies.
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84 |
23235480
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Furthermore, increased PAI-1 and p21 expression was associated with elevated promoter H3K9/14Ac levels in glomeruli from diabetic mice.
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85 |
23235480
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Thus TGF-β1-induced PAI-1 and p21 expression involves interaction of p300/CBP with Smads and Sp1, and increased promoter access via p300/CBP-induced H3K9/14Ac.
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86 |
23646198
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Ablation of C/EBP homologous protein does not protect T17M RHO mice from retinal degeneration.
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87 |
23646198
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The purpose of this study is to investigate the role of CHOP protein in T17M RHO retina.
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88 |
23646198
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Wild-type, CHOP-/-, T17M RHO and T17M RHO CHOP-/-mice were used in the study.
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89 |
23646198
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Dark-adapted ERG analysis demonstrated that by 1 month, the T17M RHO CHOP-/- mice had a 70% reduction of the a-wave amplitude compared to the T17M RHO mice.
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90 |
23646198
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The loss of function in T17M RHO CHOP-/- photoreceptors was associated with a 22-24% decline in the thickness of the outer nuclear layer.
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91 |
23646198
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These mice had significant reduction in the expression of transcription factors, Crx and Nrl, and also in mouse Rho, and human RHO.
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92 |
23646198
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In addition, the histone deacetylase 1 (Hdac1) protein was 2-fold elevated in the T17M RHO CHOP-/- retina.
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93 |
23646198
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The ablation of CHOP led to a reduction in the expression of photoreceptor-specific transcriptional factors, and both endogenous and exogenous RHO mRNA.
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94 |
23835259
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Exercise and diabetes have opposite effects on the assembly and O-GlcNAc modification of the mSin3A/HDAC1/2 complex in the heart.
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