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Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function.

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Presentation on theme: "Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function."— Presentation transcript:

1 Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function of Bone Marrow-Derived Mononuclear Cells From Patients With Cardiovascular Disease J Am Coll Cardiol. 2012;59(23):2107-2117. doi:10.1016/j.jacc.2012.02.033 Expression Profiling of Micro-RNAs Expression of micro-RNAs (miRs) in patients with myocardial infarction (n = 6) compared with healthy controls (n = 6). (A) The M/A plot shows the distribution of the “Patient”/“Control” intensity ratio (‘M’) plotted by the average intensity (‘A’) for each miRNA. Hybridization probes for upregulated miRs (p <0.05) are shown in red. (B) Micro-RNA expression is given as miR expression in patients versus bone marrow–mononuclear cells in healthy controls. Mean ± SEM, *p <0.05 patients versus healthy controls (1-way analysis of variance). Figure Legend:

2 Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function of Bone Marrow-Derived Mononuclear Cells From Patients With Cardiovascular Disease J Am Coll Cardiol. 2012;59(23):2107-2117. doi:10.1016/j.jacc.2012.02.033 Validation of Micro-RNA Expression (A to H) Expression of micro-RNAs (miRs) was determined by TaqMan polymerase chain reaction in bone marrow–derived mononuclear cells isolated from healthy controls (HC) (n=11), patients with ischemic cardiomyopathy (ICM) (n = 11), patients with acute myocardial infarction (AMI) (n = 8), and patients with dilated cardiomyopathy (DCM) (n = 7). *p <0.05 versus HC; (1-way analysis of variance with post-hoc Bonferroni or Dunnett's T3 adjustment). Figure Legend:

3 Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function of Bone Marrow-Derived Mononuclear Cells From Patients With Cardiovascular Disease J Am Coll Cardiol. 2012;59(23):2107-2117. doi:10.1016/j.jacc.2012.02.033 Correlation of Micro-RNA Expression With Age (A to F) Micro-RNA (miR) expression was measured in bone marrow–derived mononuclear cells (BMCs) of the entire cohort (n = 37), including healthy controls and patients by TaqMan polymerase chain reaction and was correlated to the age of the BMC donor. Statistical analysis was performed by Spearman test. (G to I) Micro-RNA expression was determined by miR array in BMCs isolated from young (6 week old, n = 4) and 18 month old (n = 4) C57Bl6 mice. *p <0.05 versus young mice (t-test). Figure Legend:

4 Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function of Bone Marrow-Derived Mononuclear Cells From Patients With Cardiovascular Disease J Am Coll Cardiol. 2012;59(23):2107-2117. doi:10.1016/j.jacc.2012.02.033 DNA Methylation of the MiR-34a Promoter (A) Validation of the DNA methylation specific polymerase chain reactions (PCRs) in Hek293 cells that were treated with 5- Azacytidine (5 μM, 72 h). (B) PCR detecting methylated (indicated by “M”) and unmethylated (indicated by “U”) in bone marrow– derived mononuclear cells from patients and healthy volunteers. Three representative examples are shown. Negative controls (Neg) were products from methylation-specific PCR by adding RNase-free water instead of Bisulfited DNA. Hek293 cells were used as positive control (Pos). Figure Legend:

5 Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function of Bone Marrow-Derived Mononuclear Cells From Patients With Cardiovascular Disease J Am Coll Cardiol. 2012;59(23):2107-2117. doi:10.1016/j.jacc.2012.02.033 Inhibition of MiR-34 Improves BMC Survival (A) Micro-RNA-34a (miR-34a) was inhibited by incubating bone marrow–derived mononuclear cells (BMCs) with anti-miR-34a for 36 hours. Micro-RNA-34a expression was determined by TaqMan polymerase chain reaction (n = 9, n = 3 to 6 [t-test]). (B) Cell death was induced by 200 μM H 2 0 2 (12 h) in phosphate-buffered saline (PBS), control anti-miR (locked nuclear acid [LNA]-co, 500 nM) and anti-miR-34a (LNA-34a, 500 nM). *p <0.05 versus LNA-co + hydrogen peroxide (n = 9; 1-way analysis of variance [ANOVA]and Fisher's least significant difference test [LSD]). (C) Cell death was induced by starvation (0% FCS) for 48 h in PBS, control anti-miR (LNA-co, 500 nM) and anti-miR-34a (LNA-34a, 500 nM). *p <0.05 versus PBS-0% FCS and LNA-co-0% FCS (n = 9 from 2 donors; 1- way ANOVA and Fisher's LSD). (D) BMCs were incubated with PBS, LNA-co, or LNA-34a (500 nM) for 36 h and invasion was stimulated by 0.1 μg/ml stromal cell–derived factor 1 (SDF-1) for an additional 24 h. *p <0.05 versus LNA-co+SDF-1 (n = 12 from 6 donors; 1-way ANOVA and Fisher's LSD). FCS = fetal calf serum. Figure Legend:

6 Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function of Bone Marrow-Derived Mononuclear Cells From Patients With Cardiovascular Disease J Am Coll Cardiol. 2012;59(23):2107-2117. doi:10.1016/j.jacc.2012.02.033 Micro-RNA-34a Induced Cell Death and Reduced the Expression of Anti-Apoptotic Proteins and Cell Cycle Regulators Pre-micro-RNA(miR)-34a (5 nM) or control precursor (pre-co) were overexpressed by electroporation and miR-34a expression (A), and cell viability (B) was determined after 48 h. *p <0.05 versus pre-co (n = 6 to 9 from 2 different donors; t-test). (C) mRNA expression was detected in transfected bone marrow–derived mononuclear cells (BMCs) after 48 h (n = 11 to 14 from 3 different donors; t-test). (D) Representative Western blot showing the expression of miR-34a targets BMC after transfecting pre-miR-34a (5 nM) for 48 h. CDK = cyclin-dependent kinases; RNU48 = small nucleolar RNA U48. Figure Legend:

7 Date of download: 6/22/2016 Copyright © The American College of Cardiology. All rights reserved. From: Micro-RNA-34a Contributes to the Impaired Function of Bone Marrow-Derived Mononuclear Cells From Patients With Cardiovascular Disease J Am Coll Cardiol. 2012;59(23):2107-2117. doi:10.1016/j.jacc.2012.02.033 Ex Vivo Pre-Treatment of BMC With LNA-34a Improves the Therapeutic Benefit of Cell Therapy (A to C) Bone marrow–derived mononuclear cells (BMCs) were pre-treated with phosphate-buffered saline (PBS) or 500 nM locked nuclear acid (LNA)-34a for 24 h. Directly after induction of acute infarction in nude mice, PBS alone or equal numbers of PBS-treated or LNA-34a-treated BMCs were injected. Cardiac function was monitored by echocardiography after 2 weeks. N >11 per group. *p <0.05 versus BMC + PBS (1-way analysis of variance and Fisher's least significant difference test). WMSI = wall motion score index. Figure Legend:


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