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Richer E, Solano MM, Cheriet F, Lesk MR, Costantino S. Denoising OCT videos based on temporal redundancy. Sci Rep 2024; 14:6605. [PMID: 38503804 PMCID: PMC10951312 DOI: 10.1038/s41598-024-56935-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/29/2023] [Accepted: 03/12/2024] [Indexed: 03/21/2024] Open
Abstract
The identification of eye diseases and their progression often relies on a clear visualization of the anatomy and on different metrics extracted from Optical Coherence Tomography (OCT) B-scans. However, speckle noise hinders the quality of rapid OCT imaging, hampering the extraction and reliability of biomarkers that require time series. By synchronizing the acquisition of OCT images with the timing of the cardiac pulse, we transform a low-quality OCT video into a clear version by phase-wrapping each frame to the heart pulsation and averaging frames that correspond to the same instant in the cardiac cycle. Here, we compare the performance of our one-cycle denoising strategy with a deep-learning architecture, Noise2Noise, as well as classical denoising methods such as BM3D and Non-Local Means (NLM). We systematically analyze different image quality descriptors as well as region-specific metrics to assess the denoising performance based on the anatomy of the eye. The one-cycle method achieves the highest denoising performance, increases image quality and preserves the high-resolution structures within the eye tissues. The proposed workflow can be readily implemented in a clinical setting.
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Affiliation(s)
- Emmanuelle Richer
- Department of Computer Engineering and Software Engineering, École Polytechnique de Montréal, Montreal, QC, H3T 1J4, Canada
- Maisonneuve-Rosemont Hospital Research Center, Montreal, QC, H1T 2M4, Canada
| | - Marissé Masís Solano
- Maisonneuve-Rosemont Hospital Research Center, Montreal, QC, H1T 2M4, Canada
- Department of Ophthalmology, Université de Montréal, Montreal, QC, H3T 1P1, Canada
| | - Farida Cheriet
- Department of Computer Engineering and Software Engineering, École Polytechnique de Montréal, Montreal, QC, H3T 1J4, Canada
| | - Mark R Lesk
- Maisonneuve-Rosemont Hospital Research Center, Montreal, QC, H1T 2M4, Canada
- Department of Ophthalmology, Université de Montréal, Montreal, QC, H3T 1P1, Canada
| | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Center, Montreal, QC, H1T 2M4, Canada.
- Department of Ophthalmology, Université de Montréal, Montreal, QC, H3T 1P1, Canada.
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This S, Costantino S, Melichar HJ. Machine learning predictions of T cell antigen specificity from intracellular calcium dynamics. Sci Adv 2024; 10:eadk2298. [PMID: 38446885 PMCID: PMC10917351 DOI: 10.1126/sciadv.adk2298] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/10/2023] [Accepted: 01/29/2024] [Indexed: 03/08/2024]
Abstract
Adoptive T cell therapies rely on the production of T cells with an antigen receptor that directs their specificity toward tumor-specific antigens. Methods for identifying relevant T cell receptor (TCR) sequences, predominantly achieved through the enrichment of antigen-specific T cells, represent a major bottleneck in the production of TCR-engineered cell therapies. Fluctuation of intracellular calcium is a proximal readout of TCR signaling and candidate marker for antigen-specific T cell identification that does not require T cell expansion; however, calcium fluctuations downstream of TCR engagement are highly variable. We propose that machine learning algorithms may allow for T cell classification from complex datasets such as polyclonal T cell signaling events. Using deep learning tools, we demonstrate accurate prediction of TCR-transgenic CD8+ T cell activation based on calcium fluctuations and test the algorithm against T cells bearing a distinct TCR as well as polyclonal T cells. This provides the foundation for an antigen-specific TCR sequence identification pipeline for adoptive T cell therapies.
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Affiliation(s)
- Sébastien This
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
- Département de Microbiologie, Infectiologie et Immunologie, Université de Montréal, Montréal, Québec, Canada
- Department of Microbiology and Immunology, Goodman Cancer Institute, McGill University, Montréal, Québec, Canada
| | - Santiago Costantino
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
- Département d’Ophtalmologie, Université de Montréal, Montréal, Québec, Canada
| | - Heather J. Melichar
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
- Department of Microbiology and Immunology, Goodman Cancer Institute, McGill University, Montréal, Québec, Canada
- Département de Médecine, Université de Montréal, Montréal, Québec, Canada
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3
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Masís Solano M, Bélanger Nzakimuena C, Dumas R, Lesk MR, Costantino S. Ocular rigidity and choroidal thickness changes in response to microgravity: A case study. Am J Ophthalmol Case Rep 2023; 32:101940. [PMID: 37860670 PMCID: PMC10582271 DOI: 10.1016/j.ajoc.2023.101940] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2023] [Revised: 10/03/2023] [Accepted: 10/05/2023] [Indexed: 10/21/2023] Open
Abstract
Purpose To evaluate ocular rigidity and choroidal thickness changes in response to microgravity and the Valsalva maneuver in a private astronaut. Methods Ophthalmological examination and Optical Coherence Tomography were performed before, during, and after space flight. Choroidal thickness was measured at all time points at rest and during the Valsalva maneuver. Ocular rigidity was obtained before and after flight using a non-invasive method enhanced with deep learning-based choroid segmentation. Results Ocular rigidity decreased after space flight compared to baseline. There was an increase in average choroidal thickness during the Valsalva maneuver compared to the resting condition before, during, and after space flight, and such increase was greater when the Valsalva maneuver was performed during space flight. Conclusions and importance The data indicates biomechanical changes to ocular tissues because of space flight and greater choroidal thickness increase. The findings could lead to a better understanding of space flight-associated neuro-ocular syndrome and may have repercussions for short duration missions in a nascent industry.
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Affiliation(s)
- Marissé Masís Solano
- Département d’Ophtalmologie, Université de Montréal, Canada
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Canada
| | | | | | - Mark R. Lesk
- Département d’Ophtalmologie, Université de Montréal, Canada
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Canada
| | - Santiago Costantino
- Département d’Ophtalmologie, Université de Montréal, Canada
- Centre de recherche de l'Hôpital Maisonneuve-Rosemont, Canada
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Sayah DN, Mazzaferri J, Descovich D, Costantino S, Lesk MR. Ocular rigidity and neuroretinal damage in patients with vasospasticity: a pilot study. Can J Ophthalmol 2023; 58:338-345. [PMID: 35358484 DOI: 10.1016/j.jcjo.2022.02.009] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/07/2021] [Revised: 02/08/2022] [Accepted: 02/12/2022] [Indexed: 11/22/2022]
Abstract
OBJECTIVE Evidence suggests that ocular blood flow dysregulation in patients with vasospasticity could occur in response to biomechanical stimuli, contributing to optic nerve head susceptibility in glaucoma. We evaluate the role of vasospasticity in the association between ocular rigidity (OR) and neuroretinal damage, hypothesizing that low OR correlates with greater glaucoma damage in patients with vasospasticity. DESIGN Cross-sectional study. PARTICIPANTS Patients with open-angle glaucoma (OAG), suspect discs, or no glaucoma. METHODS OR was measured using a noninvasive, validated method developed by our group. Retinal nerve fibre layer (RNFL) and ganglion cell complex thicknesses were acquired using spectral domain optical coherence tomography. Vasospasticity was assessed by a standardized questionnaire that was based on existing validated questionnaires and adapted to our requirements. Atherosclerosis was evaluated based on Broadway and Drance's (1998) cardiovascular disease score. Correlations between OR and structural parameters were assessed in patients with vasospasticity and those with atherosclerosis. RESULTS Of 118 patients with either OAG (n = 67), suspect discs (n = 26), or no glaucoma (n = 25) who were recruited consecutively, 10 were classified as having vasospasticity, and 37 as having atherosclerosis. In the vasospastic group, significant correlations were found between OR and the minimum ganglion cell complex thickness (rs = 0.681, p = 0.030), the average RNFL thickness (rs = 0.745, p = 0.013), and the RNFL in the temporal quadrant (rs = 0.772, p = 0.009), indicating more damage with lower OR. Similar trends were maintained when applying multiple testing correction; however, only the eighth RNFL clock hour corresponding to the inferior-temporal peripapillary region remained significantly correlated with OR in the vasospastic group (p = 0.015). In contrast, no correlation was found in the atherosclerotic group (p > 0.05). CONCLUSIONS The findings of the current pilot study indicate a trend for more neuronal structural damage in less-rigid eyes of patients with vasospasticity, meaning that OR may play a greater role in glaucoma in vasospastic patients than in patients with atherosclerosis. Although these results provide interesting insight into the pathophysiology of OAG, further investigation is needed to confirm our observations.
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Affiliation(s)
- Diane N Sayah
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, QC; Department of Ophthalmology, Université de Montréal, Montreal, QC
| | | | | | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, QC; Department of Ophthalmology, Université de Montréal, Montreal, QC; Centre Universitaire d'Ophtalmologie (CUO), Maisonneuve-Rosemont Hospital, CIUSSS-E, Montreal, QC
| | - Mark R Lesk
- Maisonneuve-Rosemont Hospital Research Centre, Montreal, QC; Department of Ophthalmology, Université de Montréal, Montreal, QC; Centre Universitaire d'Ophtalmologie (CUO), Maisonneuve-Rosemont Hospital, CIUSSS-E, Montreal, QC.
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Desjardins-Lecavalier N, Annis MG, Nowakowski A, Kiepas A, Binan L, Roy J, Modica G, Hébert S, Kleinman CL, Siegel PM, Costantino S. Migration speed of captured breast cancer subpopulations correlates with metastatic fitness. J Cell Sci 2023; 136:jcs260835. [PMID: 37313743 PMCID: PMC10657211 DOI: 10.1242/jcs.260835] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/24/2022] [Accepted: 06/02/2023] [Indexed: 06/15/2023] Open
Abstract
The genetic alterations contributing to migration proficiency, a phenotypic hallmark of metastatic cells required for colonizing distant organs, remain poorly defined. Here, we used single-cell magneto-optical capture (scMOCa) to isolate fast cells from heterogeneous human breast cancer cell populations, based on their migratory ability alone. We show that captured fast cell subpopulations retain higher migration speed and focal adhesion dynamics over many generations as a result of a motility-related transcriptomic profile. Upregulated genes in isolated fast cells encoded integrin subunits, proto-cadherins and numerous other genes associated with cell migration. Dysregulation of several of these genes correlates with poor survival outcomes in people with breast cancer, and primary tumors established from fast cells generated a higher number of circulating tumor cells and soft tissue metastases in pre-clinical mouse models. Subpopulations of cells selected for a highly migratory phenotype demonstrated an increased fitness for metastasis.
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Affiliation(s)
- Nicolas Desjardins-Lecavalier
- Maisonneuve-Rosemont Hospital Research Center, 5415, boulevard de l'Assomption, Montréal, QC H1T 2M4, Canada
- Institut de genie biomedical, University of Montreal, Pavillon Paul-G.-Desmarais, 2960, chemin de la Tour, Montréal, QC H3T 1J4, Canada
| | - Matthew G. Annis
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada
- Department of Medicine, McGill University, 1001 Decarie Boulevard, Montreal, QC H4A 3J1, Canada
| | - Alexander Nowakowski
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada
- Department of Medicine, McGill University, 1001 Decarie Boulevard, Montreal, QC H4A 3J1, Canada
| | - Alexander Kiepas
- Cell Biology Section, National Institute of Dental and Craniofacial Research, National Institutes of Health Bethesda, MA 20892-4370, USA
| | - Loïc Binan
- Maisonneuve-Rosemont Hospital Research Center, 5415, boulevard de l'Assomption, Montréal, QC H1T 2M4, Canada
| | - Joannie Roy
- Maisonneuve-Rosemont Hospital Research Center, 5415, boulevard de l'Assomption, Montréal, QC H1T 2M4, Canada
| | - Graziana Modica
- Maisonneuve-Rosemont Hospital Research Center, 5415, boulevard de l'Assomption, Montréal, QC H1T 2M4, Canada
| | - Steven Hébert
- Lady Davis Institute, McGill University, Montréal, QC H3T 1E2, Canada
| | - Claudia L. Kleinman
- Lady Davis Institute, McGill University, Montréal, QC H3T 1E2, Canada
- Department of Human Genetics, McGill University, Montréal, QC H3T 1E2, Canada
| | - Peter M. Siegel
- Goodman Cancer Institute, McGill University, 1160 Pine Avenue West, Montreal, QC H3A 1A3, Canada
- Department of Medicine, McGill University, 1001 Decarie Boulevard, Montreal, QC H4A 3J1, Canada
| | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Center, 5415, boulevard de l'Assomption, Montréal, QC H1T 2M4, Canada
- Department of Ophthalmology, University of Montreal, Pavillon Roger-Gaudry, Bureau S-700, 2900, boul. Édouard-Montpetit, Montréal, QC H3T 1J4, Canada
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Dumas R, Lacourse M, Kassem R, Lesk MR, Costantino S. Quantification of Hypotony Maculopathy Using Spectral-Domain Optical Coherence Tomography. J Glaucoma 2023; 32:287-292. [PMID: 36729657 DOI: 10.1097/ijg.0000000000002161] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/19/2022] [Accepted: 11/25/2022] [Indexed: 02/03/2023]
Abstract
PRCIS We provide a free-to-use, open-source algorithm to quantify macular hypotony based on optical coherence tomography (OCT) images. This numerical approach calculates a metric that measures the deviations of Bruch's membrane from a smooth ideal retinal layer. PURPOSE Hypotony maculopathy is a recurrent complication of glaucoma surgical interventions in which extremely low intraocular pressure triggers changes in the shape of retinal layers. Abnormal folds can often be observed in the retina using standard fundoscopy, but OCT is particularly important to appreciate the severity of symptoms at different depths. Despite the need for metrics that could be used for the informed clinical decision to evaluate the progression and resolution of macular hypotony, algorithms that quantify the retinal folds are not available in the literature or included in clinical imaging equipment. The purpose of this work is to introduce a simple algorithm that can be used to assess hypotony maculopathy from OCT B-Scans and volumes and a free, open-source implementation. METHODS The pipeline we present is based on a straightforward segmentation of Bruch's membrane complex. The principal idea of quantification is to compute a smoothed version of this complex and analyze the deviations from an ideal interface. Such deviations are then measured and added to create a metric that characterizes each OCT B-Scan. A full OCT volume reconstruction is thus characterized by the average metric obtained from all planes. RESULTS We tested the metric we proposed against the assessment of 3 experts and obtained a very good correspondence, with Pearson correlation coefficients higher than 0.8. Furthermore, agreement with automatic analysis seemed better than between experts. We describe the pipeline in detail and illustrate the results with a group of patients, comparing baseline images, severe hypotony maculopathy, and a variety of outcomes. CONCLUSION The tool we introduce and openly provide fills a clinical gap to quantitatively grade hypotony maculopathy. It offers a metric of relatively simple interpretation that can be used to help clinicians in cases where the regression of symptoms is not obvious to the naked eye. Our pilot study demonstrates reliable results, and an open-source implementation facilitates easy improvements to our algorithm.
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Affiliation(s)
- Rémy Dumas
- Maisonneuve-Rosemont Hospital Research Center
- École Polytechnique de Montréal
| | - Magaly Lacourse
- Maisonneuve-Rosemont Hospital Research Center
- Department of Ophthalmology, University of Montreal, Montreal, QC
| | | | - Mark R Lesk
- Maisonneuve-Rosemont Hospital Research Center
- Department of Ophthalmology, University of Montreal, Montreal, QC
| | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Center
- Department of Ophthalmology, University of Montreal, Montreal, QC
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Modica G, Roy J, Wurtele H, Costantino S. Focus in numbers: Characterizing protein oligomerization dynamics at DNA double strand breaks. Biophys J 2023; 122:356a. [PMID: 36783806 DOI: 10.1016/j.bpj.2022.11.1970] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/12/2023] Open
Affiliation(s)
- Graziana Modica
- Centre de Recherche Hôpital Maisonneuve Rosemont, Université de Montreal, Montreal, QC, Canada
| | - Joannie Roy
- Centre de Recherche Hôpital Maisonneuve Rosemont, Université de Montreal, Montreal, QC, Canada
| | - Hugo Wurtele
- Centre de Recherche Hôpital Maisonneuve Rosemont, Université de Montreal, Montreal, QC, Canada
| | - Santiago Costantino
- Centre de Recherche Hôpital Maisonneuve Rosemont, Université de Montreal, Montreal, QC, Canada
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Desjardins-Lecavalier N, Modica G, Costantino S. Laser-Assisted Single-Cell Labeling and Capture. Methods Mol Biol 2023; 2614:357-368. [PMID: 36587135 DOI: 10.1007/978-1-0716-2914-7_21] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/02/2023]
Abstract
Single-cell technologies have become critical tools to understand and characterize the complex dynamics that govern biological systems, from embryonic development to cancer heterogeneity. In this context, identification and capture of live individual cells in heterogenous ensembles typically rely on genetic manipulations that encode fluorescent probes. However, a precise understanding of how several molecular components interact to yield the phenotype of interest is a prerequisite to distinguishing and isolating such target cells based on fluorescence alone. Indeed, cellular phenotypes associated with migration, shape, location, or intracellular protein distribution play critical and well-understood roles in cancer biology, but the technologies to tag and isolate cells based on information obtained from imaging are not readily available.Cell labeling via photobleaching (CLaP) and single-cell magneto-optical capture (scMOCa) represent convenient and cost-effective systems for labeling, capturing, and expanding single cells from a heterogenous population, without altering cellular physiology and therefore enabling not only transcriptomic profiling but also biological characterization of target cells. Both techniques allow capturing cells after observation and permit researchers to choose target cells based on information obtained from images. The implementation of these technologies only needs the lasers of a confocal microscope and low-cost, commercially available chemical reagents. Here, we describe a detailed protocol to set up and perform CLaP and scMOCa and highlight critical points for optimal performance.
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Affiliation(s)
| | - Graziana Modica
- Maisonneuve-Rosemont Hospital Research Center, Montreal, QC, Canada
| | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Center, Montreal, QC, Canada. .,Department of Ophthalmology, University of Montreal, Montreal, QC, Canada.
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Solano MM, Richer E, Cheriet F, Lesk MR, Costantino S. Mapping Pulsatile Optic Nerve Head Deformation Using OCT. Ophthalmol Sci 2022; 2:100205. [PMID: 36531582 PMCID: PMC9754981 DOI: 10.1016/j.xops.2022.100205] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 04/25/2022] [Revised: 07/18/2022] [Accepted: 07/18/2022] [Indexed: 06/17/2023]
Abstract
OBJECTIVE To develop a noninvasive technique to quantitatively assess the pulsatile deformation due to cardiac contractions of the optic nerve head (ONH). DESIGN Evaluation of a diagnostic test or technology. PARTICIPANTS Healthy subjects with no history of refractive surgery, divided into 2 cohorts on the basis of their axial length (AL). METHODS We present a noninvasive technique to quantitatively assess the pulsatile deformation of the ONH tissue by combining high-frequency OCT imaging and widely available image processing algorithms. We performed a thorough validation of the approach, numerically and experimentally, evaluating the sensitivity of the method to artificially induced deformation and its robustness to different noise levels. We performed deformation measurements in cohorts of healthy (n = 9) and myopic (n = 5) subjects in different physiological strain conditions by calculating the amplitude of tissue displacement in both the primary position and abduction. The head rotation was measured using a goniometer. During imaging in abduction, the head was rotated 40° ± 3°, and subjects were instructed to direct their gaze toward the OCT visual target. MAIN OUTCOME MEASURES Pulsatile tissue displacement maps. RESULTS The robustness of the method was assessed using artificial deformations and increasing noise levels. The results show acceptable absolute errors before the noise simulations grossly exaggerate image degradation. For the group of subjects with AL of < 25 mm (n = 9), the median pulsatile displacement of the ONH was 7.8 ± 1.3 μm in the primary position and 8.9 ± 1.2 μm in abduction. The Wilcoxon test showed a significant difference (P ≤ 0.005) between the 2 paired measures. Reproducibility was tested in 2 different sessions in 5 different subjects with the same intraocular pressure, and an intraclass correlation coefficient of 0.99 was obtained (P < 0.005). CONCLUSIONS The computational pipeline demonstrated good reproducibility and had the capacity to accurately map the pulsatile deformation of the optic nerve. In a clinical setting, we detected physiological changes in normal subjects supporting its translation potential as a novel biomarker for the diagnosis and progression of optic nerve diseases.
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Affiliation(s)
- Marissé Masís Solano
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada
- Department of Ophthalmology. Université de Montréal, Montreal, Quebec, Canada
| | - Emmanuelle Richer
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada
- Department of Computer Engineering and Software Engineering, École Polytechnique de Montréal, Montreal, Quebec, Canada
| | - Farida Cheriet
- Department of Computer Engineering and Software Engineering, École Polytechnique de Montréal, Montreal, Quebec, Canada
| | - Mark R. Lesk
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada
- Department of Ophthalmology. Université de Montréal, Montreal, Quebec, Canada
| | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada
- Department of Ophthalmology. Université de Montréal, Montreal, Quebec, Canada
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Ambrosini S, Mohammed SA, Gorica E, Herwig M, Karsay G, Hornemann T, Ruschitzka F, Hamdani N, Costantino S, Paneni F. The histone methyltransferase SETD2 drives cardiometabolic heart failure with preserved ejection fraction. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2963] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Heart failure with preserved ejection fraction (HFpEF) is highly prevalent in patients with cardiometabolic disorders and associates with a poor outcome. Pathological gene expression in heart failure is accompanied by changes in active histone marks without major alterations in DNA methylation. Histone 3 trimethylation at lysine 36 (H3k36me3) – an active chromatin mark induced by the methyltransferase SETD2 – was recently found among the top epigenetic signatures in failing human hearts. Yet, the role of SETD2/H3k36me3 in heart failure is poorly understood.
Purpose
To investigate whether SETD2 participates in the transcriptional regulation of cardiometabolic HFpEF.
Methods
Mice with cardiomyocyte-specific deletion of SETD2 (c-SETD2−/−) and control littermates (SETD2fl/fl) were generated and subjected to high fat diet feeding and L-NAME treatment for 15 weeks to induce cardiometabolic HFpEF. Histology, mouse echocardiography (Vevo3100) and Treadmill exhaustion test were performed. ChIP-Seq datasets were employed to determine the biological pathways regulated by H3k36me3, whereas chromatin immunoprecipitation assays (ChIP) were performed to investigate SETD2/H3k36me3 enrichment on gene promoters. SETD2 gain- and loss-of-function experiments were performed in cultured cardiomyocytes (CMs) exposed to palmitic acid. Lipotoxic injury was assessed by mass spectrometry (MS)-based quantification of lipid species, autophagic flux (by Western blot) and apoptosis (by Caspase-3 activity assay). SETD2/H3k36me3 were also investigated in left ventricular myocardial specimens from patients with HFpEF and were correlated to passive stiffness.
Results
ChIP-Seq in mouse CMs showed a strong enrichment of SETD2/H3k36me3 in pathways underpinning triglyceride synthesis. SETD2 and H3k36me3 were upregulated in HFpEF vs. control mouse hearts and were highly enriched on the promoter of sterol regulatory element-binding transcription factor 1 (SREBF1) gene. These changes were associated with SREBF1 upregulation, myocardial triglyceride accumulation and lipotoxic damage. In HFpEF mice, cardiomyocyte-specific deletion of SETD2 prevented hypertrophic remodeling, diastolic dysfunction and lung congestion while improving exercise tolerance. Moreover, SETD2 deletion blunted H3K36me3 enrichment on SREBF1 promoter thus preventing SREBF1-related lipid accumulation, impaired autophagic flux and apoptosis. In cultured CMs exposed to palmitic acid, SETD2 depletion prevented H3k36me3-driven SREBF1 upregulation, whereas SETD2 overexpression recapitulated lipotoxic damage. SREBF1 knockdown prevented lipotoxic injury in SETD2-overexpressing CMs, suggesting its direct role in SETD2 signalling. Finally, SETD2 was upregulated in myocardial samples from obese patients with HFpEF and positively correlated with cardiomyocyte stiffness, a major feature of HFpEF.
Conclusions
SETD2 may represent an attractive molecular target for the prevention of cardiometabolic HFpEF.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): University of Zürich
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Affiliation(s)
- S Ambrosini
- University of Zurich , Schlieren , Switzerland
| | | | - E Gorica
- University of Zurich , Schlieren , Switzerland
| | - M Herwig
- Ruhr University Bochum , Bochum , Germany
| | - G Karsay
- University Hospital Zurich, Institute of Clinical Chemistry , Zurich , Switzerland
| | - T Hornemann
- University Hospital Zurich, Institute of Clinical Chemistry , Zurich , Switzerland
| | - F Ruschitzka
- University Hospital Zurich, University Heart Center, Cardiology , Zurich , Switzerland
| | - N Hamdani
- Ruhr University Bochum , Bochum , Germany
| | | | - F Paneni
- University of Zurich , Schlieren , Switzerland
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Ambrosini S, Montecucco F, Koljin D, Akhmedov A, Pedicino D, Mohammed SA, Kiss A, Beltrami AP, Luscher TF, Crea F, Ruschitzka F, Hamdani N, Costantino S, Paneni F. A methylation-dependent checkpoint by SETD7 promotes myocardial ischemic injury in mice and men. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2922] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Despite appropriate revascularization strategies, a significant number of patients with myocardial infarction (MI) develop ischemic heart failure suggesting that breakthrough therapies are yet to be approved in this setting. Methylation of non-histone proteins is emerging as a central regulatory mechanism in health and disease. The methyltransferase SETD7 has been shown to methylate and alter the function of a variety of proteins in vitro, however, its function in the heart is poorly understood.
Purpose
To determine the role of SETD7 in myocardial ischemic injury.
Methods
Neonatal rat ventricular myocytes (NRVM) were exposed to normal glucose levels or glucose deprivation (GD) for 15 h, in the presence of the selective SETD7 inhibitor (R)-PFI-2 or its inactive enantiomer (S)-PFI-2. Western blot and real-time PCR were employed to investigate the effects of energy stress on SETD7 and the Hippo pathway, while apoptosis and oxidative stress were assessed by Caspase-3 activity assay and mitoSOX staining. YAP transcriptional activity was assessed by chromatin immunoprecipitation assay (ChIP) while its localization and methylation were examined by confocal microscopy and immunoblotting, respectively. SETD7 knockout (SETD7−/−) mice and wild-type (WT) littermates underwent myocardial ischemia-reperfusion (I/R) injury (1h coronary ligation /24 h of reperfusion) followed by assessment of cardiac function by echocardiography. Left ventricular (LV) myocardial samples were collected from I/R mice and patients with ischemic cardiomyopathy (ICM), and isolated cardiomyocytes were treated with (R)-PFI-2. Finally, SETD7 expression was also assessed in peripheral blood mononuclear cells (PBMCs) from patients with ST-elevation MI (STEMI).
Results
SETD7 was activated upon energy deprivation in cultured NRVMs and methylated YAP, leading to its cytosolic retention and impaired transcription of antioxidant genes MnSOD and CAT. Pharmacological inhibition of SETD7 by (R)-PFI-2 restored YAP nuclear localization thus preventing mitochondrial reactive oxygen species (mtROS) and apoptosis. SETD7 deletion in mice attenuated I/R injury, mtROS and LV dysfunction by restoring YAP-dependent transcriptional programs. SETD7/YAP dysregulation was also observed in LV specimens from ICM patients. Moreover, in cardiomyocytes isolated from I/R mice and ICM patients, (R)-PFI-2 restored YAP nuclear localization, prevented mtROS accumulation while improving myofibrillar protein contractility and Ca2+ sensitivity. Finally, SETD7 was upregulated in PBMCs from STEMI patients and negatively correlated with the expression of MnSOD and CAT.
Conclusions
SETD7-dependent methylation of YAP is an important mechanism underpinning myocardial oxidative stress and apoptosis during ischemia. Pharmacological modulation of SETD7 by (R)-PFI-2 may represent a potential therapeutic approach to prevent myocardial ischemic damage through modulation of the Hippo pathway.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): University of Zurich
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Affiliation(s)
- S Ambrosini
- University of Zurich , Schlieren , Switzerland
| | | | - D Koljin
- Ruhr University Bochum , Bochum , Germany
| | - A Akhmedov
- University of Zurich , Schlieren , Switzerland
| | - D Pedicino
- IRCCS Foundation Agostino Gemelli University Hospital , Rome , Italy
| | | | - A Kiss
- Ludwig Boltzmann Cluster for Cardiovascular Research , Vienna , Austria
| | | | - T F Luscher
- University of Zurich , Schlieren , Switzerland
| | - F Crea
- IRCCS Foundation Agostino Gemelli University Hospital , Rome , Italy
| | - F Ruschitzka
- University Hospital Zurich, University Heart Center, Cardiology , Zurich , Switzerland
| | - N Hamdani
- Ruhr University Bochum , Bochum , Germany
| | | | - F Paneni
- University of Zurich , Schlieren , Switzerland
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12
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Costantino S, Mohammed SA, Gorica E, Ambrosini S, Akhmedov A, Virdis A, Ruschitzka F, Masi S, Paneni F. Targeting Neurofibromin 2 (NF2) prevents endothelial dysfunction in obesity: a study in mice and humans. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.3026] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
The mechanisms underlying endothelial dysfunction (ED) in obesity are poorly understood. Neurofibromin 2 (NF2) is a scaffold-like protein involved in cell growth and survival. However, its role in the vascular endothelium is unknown.
Purpose
To investigate NF2 function in obesity-related ED.
Methods
Human aortic endothelial cells (HAECs) were exposed to palmitic acid (PA, 200 uM) or vehicle for 48 hours. Gene silencing of NF2 was performed by small interfering RNA (siRNA). Gene and protein expression were assessed by real time PCR and Western blot, respectively. The interaction of NF2 with endothelial proteins was investigated by co-immunoprecipitation. A constitutive active mutant form of NF2 (Ala518) was employed to study the effects of NF2 gain-of-function. To specifically investigate NF2 role in the vascular endothelium, we generated mice with endothelium-specific deletion of NF2 (NF2 ECKO) by crossing NF2flox/flox mice with tamoxifen-inducible endothelial-specific Cre mice [Cdh5(PAC)-CreERT2]. Endothelium-dependent relaxations to acetylcholine (Ach) were assessed in aortas from NF2 ECKO and wild type (WT) littermates, fed a control and a high fat diet (60 kcal% fat) for 20 weeks. NF2 signalling and endothelial function were also assessed in small visceral fat arteries (VFA) isolated from 18 obese and 18 age-matched healthy subjects undergoing bariatric surgery and cholecystectomy, respectively. Gene in silencing of NF2 by siRNA was performed in VFA from obese patients.
Results
In HAECs, PA promoted NF2 activation by decreasing its phosphorylation at Ser518. Akt and MYPT-1 were responsible for NF2 dephosphorylation. In PA-treated HAECs, NF2 was mainly found in the plasma membrane as compared to other cell fractions. Among different membrane proteins implicated in endothelial homeostasis, NF2 binds and activates Caveolin 1 (Cav-1), a pivotal repressor of endothelial NO synthase (eNOS). NF2 knockdown in PA-treated HAECs prevented eNOS–Cav-1 interaction, thus preserving eNOS activity and NO levels. By contrast, HAECs expressing the constitutive active mutant form of NF2 displayed reduced eNOS activity. In aortas from obese mice, we found that NF2-Cav-1 interaction was responsible for impaired eNOS activity and ED. Cav-1 gene silencing in NF2-overexpressing aortas prevented ED, thus confirming the direct involvement of Cav-1 in NF2-induced ED. Interestingly, Ach-dependent vasorelaxation was preserved in obese NF2 ECKO mice as compared to WT littermates. Moreover, NO bioavailability was preserved in aortas from NF2 ECKO mice. In VFA from obese patients, NF2 was upregulated, and its activity negatively correlated with Ach-dependent vasorelaxation. Of note, NF2 gene silencing in VFA from obese patients rescued ED.
Conclusions
In human endothelial cells, mice with endothelium-specific deletion of NF2 and VFA from obese patients, we show that NF2 drives ED by repressing Cav-1. Targeting NF2 may prevent ED in obese patients.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Holcim Stiftung
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Affiliation(s)
- S Costantino
- University Hospital Zurich, Cardiology , Zurich , Switzerland
| | - S A Mohammed
- University of Zurich, Center for Molecular Cardiology , Schlieren , Switzerland
| | - E Gorica
- University of Zurich, Center for Molecular Cardiology , Schlieren , Switzerland
| | - S Ambrosini
- University of Zurich, Center for Molecular Cardiology , Schlieren , Switzerland
| | - A Akhmedov
- University of Zurich, Center for Molecular Cardiology , Schlieren , Switzerland
| | - A Virdis
- University of Pisa, Clinical and Experimental Medicine , Pisa , Italy
| | - F Ruschitzka
- University Hospital Zurich, Cardiology , Zurich , Switzerland
| | - S Masi
- University of Pisa, Clinical and Experimental Medicine , Pisa , Italy
| | - F Paneni
- University Hospital Zurich, Cardiology , Zurich , Switzerland
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13
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Kiss A, Szabo PL, Ebner J, Hilber K, Abraham D, Costantino S, Paneni F, Nikhanj A, Kashyap N, Ouadit GY, Podesser BK. Increased Tenascin-C expression contributes to cardiac dysfunction and fibrosis in Duchenne muscular dystrophy. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2986] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction and aims
Cardiac fibrosis is characterized by the net accumulation of extracellular matrix (ECM) proteins in the cardiac interstitium and contributes to cardiac contractile dysfunction. In Duchenne muscular dystrophy (DMD), cardiomyopathy develops as a result of a dystrophin deficiency causing fibrofatty replacement of the myocardium, however the underlying mechanisms are not fully understood. There is a growing collection of evidence that ECM proteins, including Tenascin C (TN-C), plays a maladaptive role in left ventricular (LV) remodelling and cardiac fibrosis in ischemic heart disease. The aims of our study were 1) to assess TN-C levels, fibrosis and cardiac dysfunction in DMD patients, and 2) to clarify the role of TN-C in cardiovascular dysfunction and fibrosis using male mdx (n=10) and mdx TN-C KO mice (n=8).
Results
In male patients with DMD (n=18) and age matched controls (n=12) undergoing cardiac MRI, we detected greater myocardial fibrosis than in control hearts. In addition, we observed an elevation of TN-C plasma levels [median concentration (3.55); interquartile range (0.61–7.43) ng/mL] in DMD patients, and its expression negatively correlated to LV ejection fraction (EF) [median LVEF (45); interquartile range (37.5–51.5) %]. Male wt, mdx and mdx TN-C KO age-matched (10 months) mice were used. Transthoracic echocardiography was performed and fibrosis was assessed on cardiac tissue sections. Wire myography was used to assess vascular endothelial function. To explore the signalling pathways contributing to cardiac fibrosis, human cardiac fibroblasts (hCFs) were treated with recombinant human TN-C or TGF-β and gene expression and epigenetic regulation of NF-kB/p65 were assessed. Mdx mice showed significantly increased cardiac fibrosis which was accompanied with markedly elevated TN-C level in cardiac tissue and plasma compared to wt animals (p<0.05, respectively). Moreover, TN-C level in plasma correlated positively with the degree of cardiac dilation in dystrophic mice. In addition, vascular endothelial function was notably impaired in mdx mice. In contrast, we observed preserved vascular function in mdx- TN-C KO mice, this was accompanied by a significant reduction in cardiac fibrosis in compared to age-matched mdx mice (p<0.05, respectively). hCFs treated with TN-C or TGF-β showed increased collagen and α-SMA expressions which could be prevented by application of siRNA against TN-C. In addition, both TN-C and TGF-β caused p65/NF-κB promoter demethylation and subsequently triggered pro-inflammatory and pro-fibrotic signalling, which could be reversed by applying p38 MAPK inhibitor in hCFs.
Conclusion
TN-C is a critical component of cardiac fibrosis and cardiac dysfunction in DMD. The activation of NF-κB p65 signalling pathway may play a role in TN-C induced fibrosis. Thus, TN-C may be a mediator and potential target for therapy in DMD-associated cardiovascular complications.
Funding Acknowledgement
Type of funding sources: Foundation. Main funding source(s): Österreichische MuskelforschungFWF - Austrian Science Found P 35878
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Affiliation(s)
- A Kiss
- Medical University of Vienna , Vienna , Austria
| | - P L Szabo
- Medical University of Vienna, Center for Biomedical Research , Vienna , Austria
| | - J Ebner
- Medical University of Vienna, Center for Physiology and Pharmacology , Vienna , Austria
| | - K Hilber
- Medical University of Vienna, Center for Physiology and Pharmacology , Vienna , Austria
| | - D Abraham
- Medical University of Vienna, Center for Anatomy and Cell Biology, Division of Cell and Developmental Biology , Vienna , Austria
| | - S Costantino
- University of Zurich and University Heart Center, Center for Molecular Cardiology, , Zurich , Switzerland
| | - F Paneni
- University of Zurich and University Heart Center, Center for Molecular Cardiology, , Zurich , Switzerland
| | - A Nikhanj
- Mazankowski Alberta Heart Institute, Department of Medicine, Faculty of Medicine and Dentistry, Uni, Division of Cardiology , Edmonton , Canada
| | - N Kashyap
- Mazankowski Alberta Heart Institute, Department of Medicine, Faculty of Medicine and Dentistry, Uni, Division of Cardiology , Edmonton , Canada
| | - G Y Ouadit
- Mazankowski Alberta Heart Institute, Department of Medicine, Faculty of Medicine and Dentistry, Uni, Division of Cardiology , Edmonton , Canada
| | - B K Podesser
- Medical University of Vienna, Center for Biomedical Research , Vienna , Austria
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14
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Mohammed S, Gorica E, Karsay G, Albiero M, Ambrosini S, Akhmedov A, Spinetti G, Luscher TF, Fadini GP, Ruschitzka F, Costantino S, Paneni F. A chromatin signature by the methyltransferase SETD7 orchestrates angiogenic response in diabetic limb ischemia. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.3043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Peripheral artery disease (PAD) is highly prevalent in patients with diabetes (DM) and associates with a high rate of limb amputation and poor prognosis. Surgical and catheter-based revascularization have failed to improve outcome in DM patients with PAD. Hence, a need exists to develop new treatment strategies able to promote blood vessel growth in this setting. Mono-methylation of histone 3 at lysine 4 (H3K4me1) – a specific epigenetic signature induced by the histone methyltransferase SETD7 – favours an open chromatin thus enabling gene transcription.
Purpose
To investigate whether SETD7-dependent epigenetic changes modulate angiogenic response in diabetes.
Methodology
Primary human aortic endothelial cells (HAECs) were exposed to normal glucose (NG, 5 mM) or high glucose (HG, 25 mM) concentrations for 48 hours. Unbiased gene expression profiling was performed by RNA sequencing (RNA-seq) followed by Ingenuity Pathway Analysis (IPA). In vitro assays, namely cell migration and tube formation were employed to study angiogenic properties in HAECs. SETD7 and H3K4me1 levels were investigated by Western blot and Chromatin immunoprecipitation (ChIP). Pharmacological blockade of SETD7 was achieved by using the highly selective inhibitor (R)-PFI-2. Mice with streptozotocin-induced diabetes were orally treated with (R)-PFI-2 or vehicle and underwent hindlimb ischemia by femoral artery ligation for 14 days. Blood flow recovery was analysed at 30 minutes, 7 and 14 days by laser Doppler imaging. Our experimental findings were also translated in gastrocnemius muscle samples from patients with and without diabetes.
Results
RNA-seq in HG-treated HAECs revealed a profound upregulation of the methyltransferase SETD7, an enzyme involved in mono-methylation of lysine 4 at histone 3 (H3K4me1). SETD7 upregulation in HG-treated HAECs was associated with increased H3K4me1 levels as well as with impaired endothelial cell migration and tube formation. Both SETD7 gene silencing and pharmacological inhibition by (R)PFI-2 rescued hyperglycemia-induced impairment of HAECs migration and tube formation, while SETD7 overexpression blunted the angiogenic response. RNA-seq and ChIP assays showed that SETD7-dependent H3K4me1 regulates the transcription of the angiogenesis inhibitor semaphorin-3G (SEMA-3G). Moreover, SEMA-3G overexpression blunted migration and tube formation in SETD7-depleted HAECs. In diabetic mice with hindlimb ischemia, treatment with (R)-PFI-2 improved limb vascularization and perfusion as compared to vehicle. Finally, SETD7/SEMA3G axis was upregulated in muscle specimens from T2D patients as compared to controls.
Conclusion
Targeting SETD7 represents a novel epigenetic-based therapy to boost neovascularization in diabetic patients with PAD.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): University of Zurich - Forshungskredit candoc grant
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Affiliation(s)
- S Mohammed
- University of Zurich, Centre for molecular cardiology , Zurich , Switzerland
| | - E Gorica
- University of Pisa, Department of Pharmacy , Pisa , Italy
| | - G Karsay
- University Hospital Zurich, Clinical chemistry , Zurich , Switzerland
| | - M Albiero
- University of Padua, Veneto Institute of Molecular Medicine , Padova , Italy
| | - S Ambrosini
- University of Zurich, Centre for molecular cardiology , Zurich , Switzerland
| | - A Akhmedov
- University of Zurich, Centre for molecular cardiology , Zurich , Switzerland
| | | | - T F Luscher
- Royal Brompton and Harefield Hospital , London , United Kingdom
| | - G P Fadini
- University of Padua, Veneto Institute of Molecular Medicine , Padova , Italy
| | - F Ruschitzka
- University Hospital Zurich, Cardiology , Zurich , Switzerland
| | - S Costantino
- University Hospital Zurich, Cardiology , Zurich , Switzerland
| | - F Paneni
- University Hospital Zurich, Cardiology , Zurich , Switzerland
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15
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Costantino S, Ambrosini S, Mohammed SA, Gorica E, Akhmedov A, Cosentino F, Ruschitzka F, Hamdani N, Paneni F. A chromatin mark by SETD7 regulates myocardial inflammation in obesity-related heart failure with preserved ejection fraction. Eur Heart J 2022. [DOI: 10.1093/eurheartj/ehac544.2883] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Obesity is a major risk factor for heart failure with preserved ejection fraction (HFpEF). Post-translational modification of histones by chromatin modifying enzymes (CMEs) are emerging as pivotal regulators of gene transcription in cardiovascular disease.
Purpose
To investigate the role of chromatin remodelling in obese HFpEF (obHFpEF).
Methods
Gene expression profiling of CMEs (PCR array) was performed in left ventricular (LV) myocardial specimens from obHFpEF patients and age-matched control donors (n=8/group). Among myocardial CMEs, the methyltransferase SETD7 showed the highest variation in gene expression. Hence, we investigated the role of SETD7 and its chromatin mark H3K4me1 in a murine model of obHFpEF. Mice with cardiomyocyte-specific deletion of SETD7 (c-SETD7−/−) and control littermates (SETD7fl/fl) were subjected to high fat diet feeding and L-NAME treatment for 15 weeks to induce obHFpEF. Echocardiography and Treadmill exhaustion test were performed. ChIP-Seq datasets were employed to determine the biological pathways regulated by SETD7, whereas chromatin immunoprecipitation assays (ChIP) were performed to investigate SETD7/H3k4me1 enrichment on target gene promoters. SETD7 gain- and loss-of-function experiments were performed in cultured neonatal rat ventricular myocytes (NRVMs) exposed to palmitic acid (200μM) for 48h. Selective inhibition of SETD7 by (R)-PFI-2 was performed in skinned cardiomyocytes isolated from left ventricular specimens of obHFpEF patients. Passive stiffness, a main feature of HFpEF, was assessed before and after (R)-PFI-2 treatment.
Results
CMEs profiling showed SETD7 as the top-ranking transcript (fold change, 7.36, P<0.01) in myocardial specimens from obHFpEF patients as compared to controls. ChIP-Seq in CMs showed a strong enrichment of SETD7 and H3k4me1 on the promoter of NF-kB p65 gene, a master regulator of inflammation. SETD7 and H3k4me1 were upregulated in HFpEF vs. control mouse hearts, showed enrichment on NF-kB p65 promoter and were associated with IL-1β and IL-6 upregulation. In HFpEF mice, cardiomyocyte-specific deletion of SETD7 protected against LV hypertrophy, diastolic dysfunction (assessed by E/E' ratio) and lung congestion while improving exercise tolerance. At the molecular level, SETD7 deletion blunted H3K4me1 enrichment on p65 promoter thus preventing the upregulation of inflammatory genes and myocardial apoptosis. In cultured CMs exposed to PA, SETD7 inhibition by (R)-PFI-2 prevented H3k4me1-driven p65 upregulation, whereas SETD7 overexpression mimicked HFpEF features. Moreover, knockdown of NF-kB p65 prevented IL-1β/IL-6 transcription in SETD7-overexpressing CMs. Of clinical relevance, (R)-PFI-2 reduced passive stiffness in skinned CMs isolated from obHFpEF patients.
Conclusions
Our results unveil a new epigenetic mechanism underpinning inflammation in obHFpEF. Targeting SETD7 may represent a novel therapeutic approach to prevent HFpEF in obesity.
Funding Acknowledgement
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): Swiss National Science Foundation
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Affiliation(s)
- S Costantino
- University Hospital Zurich , Zurich , Switzerland
| | - S Ambrosini
- University of Zurich, Center for Molecular Cardiology , Schlieren , Switzerland
| | - S A Mohammed
- University of Zurich, Center for Molecular Cardiology , Schlieren , Switzerland
| | - E Gorica
- University of Zurich, Center for Molecular Cardiology , Schlieren , Switzerland
| | - A Akhmedov
- University of Zurich, Center for Molecular Cardiology , Schlieren , Switzerland
| | - F Cosentino
- Karolinska University Hospital, Cardiology , Stockholm , Sweden
| | - F Ruschitzka
- University Hospital Zurich , Zurich , Switzerland
| | - N Hamdani
- Ruhr University Bochum, Molecular and Experimental Cardiology , Bochum , Germany
| | - F Paneni
- University Hospital Zurich , Zurich , Switzerland
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16
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Szabo PL, Inci M, Hilber K, Abraham D, Trojanek S, Costantino S, Paneni F, Podesser BK, Kiss A. Tenascin-C provokes cardiac fibrosis and endothelial impairment in Duchenne Muscular Dystrophy. Cardiovasc Res 2022. [DOI: 10.1093/cvr/cvac066.152] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: Public grant(s) – National budget only. Main funding source(s): FWF Austrian Science Fund
Cardiac fibrosis and dilated cardiomyopathy are major contributors to mortality in Duchenne muscular dystrophy (DMD) patients. There is a growing collection of evidence that Tenascin C (TN-C) plays a maladaptive role in cardiac remodelling and fibrosis.
Our aims were to 1) assess the vascular dysfunction and cardiac fibrosis and its link to TN-C in a mouse model of DMD and 2) explore the effect of knocking out TN-C in dystrophic mice.
Male wt, mdx and mdx TN-C KO age-matched mice were used. Cardiac fibrosis was assessed on tissue sections. Wire myography was used to test the vascular reactivity and endothelial cells (ECs) were isolated from mouse lung tissues to characterize the oxidative stress and inflammatory marker expression. To study the signalling pathways contributing to cardiac fibrosis, human cardiac fibroblasts (hCFs) were treated with TN-C or TGF-β and gene expression and epigenetic regulation of p65 were assessed.
Cardiac fibrosis was markedly increased in mdx mice which was accompanied with elevated TN-C level in cardiac tissue and plasma compared to wt animals. In addition, endothelial cells isolated from mdx mice also showed a marked upregulation of oxidative stress and inflammatory markers and in line with that vascular endothelial function was impaired in mdx mice. Interestingly, mdx- TN-C KO mice showed preserved vascular function as well as reduced cardiac fibrosis compared to age-matched mdx mice. hCFs treated with TN-C or TGF-β showed increased collagen and α-SMA expressions which could be reduced by TN-C siRNA. In addition, both TN-C and TGF-β promote p65/NF-κB promoter demethylation and subsequently stimulate pro-inflammatory and pro-fibrotic signalling, which could be reversed by applying p38 MAPK inhibitor in hCFs.
TN-C promotes oxidative stress and inflammation in ECs and fibroblasts, contributing to severe endothelial dysfunction and cardiac fibrosis. In addition, activation of NF-κB p65 signalling pathway may play a role in TN-C induced fibrosis. Thus, TN-C may be a critical mediator and potential target for therapy in DMD.
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Affiliation(s)
- P L Szabo
- Ludwig Boltzmann Cluster for Cardiovascular Research, Center for Biomedical Research and Translational Surgery , Vienna , Austria
| | - M Inci
- Ludwig Boltzmann Cluster for Cardiovascular Research, Center for Biomedical Research and Translational Surgery , Vienna , Austria
| | - K Hilber
- Medical University of Vienna, Center for Physiology and Pharmacology , Vienna , Austria
| | - D Abraham
- Medical University of Vienna, Center for Anatomy and Cell Biology, Division of Cell and Developmental Biology , Vienna , Austria
| | - S Trojanek
- Medical University of Vienna, Center for Anatomy and Cell Biology, Division of Cell and Developmental Biology , Vienna , Austria
| | - S Costantino
- University of Zurich, Center for Molecular Cardiology , Zurich , Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology , Zurich , Switzerland
| | - B K Podesser
- Ludwig Boltzmann Cluster for Cardiovascular Research, Center for Biomedical Research and Translational Surgery , Vienna , Austria
| | - A Kiss
- Ludwig Boltzmann Cluster for Cardiovascular Research, Center for Biomedical Research and Translational Surgery , Vienna , Austria
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17
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Spinoni E, Ghiglieno C, Costantino S, Battistini E, Dell’era G, Porcellini S, Santagostino M, De Vecchi F, Patti G. Access site bleeding complications comparing oral anticoagulation therapy with NOACs and VKAs in patients with atrial fibrillation undergoing cardiac implantable device intervention. Europace 2022. [DOI: 10.1093/europace/euac053.409] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Funding Acknowledgements
Type of funding sources: None.
Background
Atrial fibrillation is frequent in patients undergoing cardiac implantable electronic device (CIED) intervention. Such population require oral anticoagulation therapy, which increases risk of procedure related bleeding. There is a lack on data on procedure-related bleeding outcome with non-vitamin K antagonist anticoagulants (NOACs) vs vitamin K antagonist anticoagulants (VKAs) in patients with AF undergoing CIED intervention.
Study purpose
Aim of the present stud was to evaluate whether NOACs have a safety benefit compared to VKAs in terms of fewer hemorrhagic complications at the site of CIED implant.
Methods
Consecutive AF patients receiving NOACs or VKAs at the time of CIED procedure were included in this observational, retrospective, monocentric investigation. Primary endpoint was the incidence of post-intervention clinically significant pocket hematoma. Multivariate analysis was performed to investigate the association between covariates and the primary endpoint.
Results
A total of 311 patients were enrolled, 146 on NOACs and 165 on VKAs. The incidence of pocket hematoma was 3.4% in the NOAC vs 13.3% in the VKA group (p=0.002) (Figure 1). Primary outcome-free survival at 30-days was 96.6 % in patients on NOACs and 86.0% in those on VKAs (p=0.019) (Figure 2). Multivariate analysis, adjusted by propensity-score calculation of inverse-probability-weighting, showed a significantly lower occurrence of pocket hematoma in patients receiving NOACs vs VKAs (HR 0.35, 95% CI 0.13-0.96, p=0.042). Such NOACs benefit was confirmed vs patients on VKAs without peri-procedural bridging with low-molecular weight heparin (HR 0.34, 95% CI 0.11-0.99, p=0.048). The incidence of pocket infection, surgical pocket evacuation, ischemic events and major bleeding complications at 30 days (secondary endpoints) was similar in the two groups.
Conclusion
Among patients with AF undergoing implantable cardiac defibrillator or pace-maker intervention, the use of NOACs vs VKAs is associated with significant reduction of post-procedural pocket hematoma, regardless of bridging with low molecular-weight heparin in the VKA group.
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Affiliation(s)
- E Spinoni
- University of Eastern Piedmont, Novara, Italy
| | - C Ghiglieno
- University of Eastern Piedmont, Novara, Italy
| | | | | | - G Dell’era
- Hospital Maggiore Della Carita, Novara, Italy
| | | | | | - F De Vecchi
- Hospital Maggiore Della Carita, Novara, Italy
| | - G Patti
- University of Eastern Piedmont, Novara, Italy
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18
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Moldoveanu D, Ramsay L, Lajoie M, Anderson-Trocme L, Lingrand M, Berry D, Perus LJM, Wei Y, Moraes C, Alkallas R, Rajkumar S, Zuo D, Dankner M, Xu EH, Bertos NR, Najafabadi HS, Gravel S, Costantino S, Richer MJ, Lund AW, Del Rincon SV, Spatz A, Miller WH, Jamal R, Lapointe R, Mes-Masson AM, Turcotte S, Petrecca K, Dumitra S, Meguerditchian AN, Richardson K, Tremblay F, Wang B, Chergui M, Guiot MC, Watters K, Stagg J, Quail DF, Mihalcioiu C, Meterissian S, Watson IR. Spatially mapping the immune landscape of melanoma using imaging mass cytometry. Sci Immunol 2022; 7:eabi5072. [PMID: 35363543 DOI: 10.1126/sciimmunol.abi5072] [Citation(s) in RCA: 46] [Impact Index Per Article: 23.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/22/2022]
Abstract
Melanoma is an immunogenic cancer with a high response rate to immune checkpoint inhibitors (ICIs). It harbors a high mutation burden compared with other cancers and, as a result, has abundant tumor-infiltrating lymphocytes (TILs) within its microenvironment. However, understanding the complex interplay between the stroma, tumor cells, and distinct TIL subsets remains a substantial challenge in immune oncology. To properly study this interplay, quantifying spatial relationships of multiple cell types within the tumor microenvironment is crucial. To address this, we used cytometry time-of-flight (CyTOF) imaging mass cytometry (IMC) to simultaneously quantify the expression of 35 protein markers, characterizing the microenvironment of 5 benign nevi and 67 melanomas. We profiled more than 220,000 individual cells to identify melanoma, lymphocyte subsets, macrophage/monocyte, and stromal cell populations, allowing for in-depth spatial quantification of the melanoma microenvironment. We found that within pretreatment melanomas, the abundance of proliferating antigen-experienced cytotoxic T cells (CD8+CD45RO+Ki67+) and the proximity of antigen-experienced cytotoxic T cells to melanoma cells were associated with positive response to ICIs. Our study highlights the potential of multiplexed single-cell technology to quantify spatial cell-cell interactions within the tumor microenvironment to understand immune therapy responses.
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Affiliation(s)
- Dan Moldoveanu
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada.,McGill University Health Centre, Montréal, QC, Canada.,Department of Surgery, Division of General Surgery, McGill University, Montréal, QC, Canada
| | - LeeAnn Ramsay
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada
| | - Mathieu Lajoie
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada
| | - Luke Anderson-Trocme
- McGill University Genome Centre, Montréal, QC, Canada.,Department of Human Genetics, McGill University, Montréal, QC, Canada
| | - Marine Lingrand
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada.,Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Diana Berry
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada.,Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Lucas J M Perus
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada
| | - Yuhong Wei
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada
| | - Cleber Moraes
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada
| | - Rached Alkallas
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada.,McGill University Genome Centre, Montréal, QC, Canada.,Department of Human Genetics, McGill University, Montréal, QC, Canada
| | - Shivshankari Rajkumar
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada.,Department of Biochemistry, McGill University, Montréal, QC, Canada
| | - Dongmei Zuo
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada
| | - Matthew Dankner
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada
| | - Eric Hongbo Xu
- Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Nicholas R Bertos
- Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Hamed S Najafabadi
- McGill University Genome Centre, Montréal, QC, Canada.,Department of Human Genetics, McGill University, Montréal, QC, Canada
| | - Simon Gravel
- McGill University Genome Centre, Montréal, QC, Canada.,Department of Human Genetics, McGill University, Montréal, QC, Canada
| | | | - Martin J Richer
- Indiana University School of Medicine, Indianapolis, IN, USA
| | - Amanda W Lund
- Ronald O. Perelman Department of Dermatology and Department of Pathology, NYU Grossman School of Medicine, New York, NY, USA
| | - Sonia V Del Rincon
- Jewish General Hospital, McGill University, Montréal, QC, Canada.,Lady Davis Institute for Medical Research, Montréal, QC, Canada
| | - Alan Spatz
- McGill University Health Centre, Montréal, QC, Canada.,Lady Davis Institute for Medical Research, Montréal, QC, Canada.,McGill University, Montréal, QC, Canada
| | - Wilson H Miller
- Jewish General Hospital, McGill University, Montréal, QC, Canada.,Lady Davis Institute for Medical Research, Montréal, QC, Canada
| | - Rahima Jamal
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM) and Institut du Cancer de Montréal, Montréal, QC, Canada
| | - Réjean Lapointe
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM) and Institut du Cancer de Montréal, Montréal, QC, Canada.,Département de Médecine, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Anne-Marie Mes-Masson
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM) and Institut du Cancer de Montréal, Montréal, QC, Canada.,Département de Médecine, Faculté de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Simon Turcotte
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM) and Institut du Cancer de Montréal, Montréal, QC, Canada
| | - Kevin Petrecca
- Montreal Neurological Institute and Hospital, Montréal, QC, Canada
| | - Sinziana Dumitra
- McGill University Health Centre, Montréal, QC, Canada.,Department of Surgery, Division of General Surgery, McGill University, Montréal, QC, Canada.,Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Ari-Nareg Meguerditchian
- McGill University Health Centre, Montréal, QC, Canada.,Department of Surgery, Division of General Surgery, McGill University, Montréal, QC, Canada.,Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | | | - Francine Tremblay
- McGill University Health Centre, Montréal, QC, Canada.,Department of Surgery, Division of General Surgery, McGill University, Montréal, QC, Canada
| | - Beatrice Wang
- McGill University Health Centre, Montréal, QC, Canada.,Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - May Chergui
- McGill University Health Centre, Montréal, QC, Canada
| | - Marie-Christine Guiot
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada.,McGill University Health Centre, Montréal, QC, Canada.,Montreal Neurological Institute and Hospital, Montréal, QC, Canada
| | - Kevin Watters
- McGill University Health Centre, Montréal, QC, Canada
| | - John Stagg
- Centre de recherche du Centre Hospitalier de l'Université de Montréal (CRCHUM) and Institut du Cancer de Montréal, Montréal, QC, Canada
| | - Daniela F Quail
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada.,Department of Physiology, McGill University, Montréal, QC, Canada
| | - Catalin Mihalcioiu
- McGill University Health Centre, Montréal, QC, Canada.,Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Sarkis Meterissian
- McGill University Health Centre, Montréal, QC, Canada.,Department of Surgery, Division of General Surgery, McGill University, Montréal, QC, Canada.,Research Institute of the McGill University Health Centre, Montréal, QC, Canada
| | - Ian R Watson
- Rosalind and Morris Goodman Cancer Institute, McGill University, Montréal, QC, Canada.,Department of Biochemistry, McGill University, Montréal, QC, Canada.,Research Institute of the McGill University Health Centre, Montréal, QC, Canada
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19
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Roversi K, Tabatabaei M, Desjardins-Lecavalier N, Balood M, Crosson T, Costantino S, Griffith M, Talbot S, Boutopoulos C. Nanophotonics Enable Targeted Photothermal Silencing of Nociceptor Neurons. Small 2022; 18:e2103364. [PMID: 35195345 DOI: 10.1002/smll.202103364] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/09/2021] [Revised: 12/28/2021] [Indexed: 06/14/2023]
Abstract
The sensory nervous and immune systems work in concert to preserve homeostasis. While this endogenous interplay protects from danger, it may drive chronic pathologies. Currently, genetic engineering of neurons remains the primary approach to interfere selectively with this potentially deleterious interplay. However, such manipulations are not feasible in a clinical setting. Here, this work reports a nanotechnology-enabled concept to silence subsets of unmodified nociceptor neurons that exploits their ability to respond to heat via the transient receptor potential vanilloid type 1 (TRPV1) channel. This strategy uses laser stimulation of antibody-coated gold nanoparticles to heat-activate TRPV1, turning this channel into a cell-specific drug-entry port. This delivery method allows transport of a charged cationic derivative of an N-type calcium channel blocker (CNCB-2) into targeted sensory fibers. CNCB-2 delivery blocks neuronal calcium currents and neuropeptides release, resulting in targeted silencing of nociceptors. Finally, this work demonstrates the ability of the approach to probe neuro-immune crosstalk by targeting cytokine-responsive nociceptors and by successfully preventing nociceptor-induced CD8+ T-cells polarization. Overall, this work constitutes the first demonstration of targeted silencing of nociceptor neuron subsets without requiring genetic modification, establishing a strategy for interfering with deleterious neuro-immune interplays.
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Affiliation(s)
- Katiane Roversi
- Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, H1T 2M4, Canada
- Département d'ophtalmologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
| | - Maryam Tabatabaei
- Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, H1T 2M4, Canada
| | - Nicolas Desjardins-Lecavalier
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, H1T 2M4, Canada
- Institut de Génie Biomédical, Université de Montréal, Montréal, QC, H3C 3J7, Canada
| | - Mohammad Balood
- Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
| | - Theo Crosson
- Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
| | - Santiago Costantino
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, H1T 2M4, Canada
- Département d'ophtalmologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
- Institut de Génie Biomédical, Université de Montréal, Montréal, QC, H3C 3J7, Canada
| | - May Griffith
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, H1T 2M4, Canada
- Département d'ophtalmologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
- Institut de Génie Biomédical, Université de Montréal, Montréal, QC, H3C 3J7, Canada
| | - Sebastien Talbot
- Département de Pharmacologie et Physiologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
| | - Christos Boutopoulos
- Centre de Recherche Hôpital Maisonneuve-Rosemont, Montréal, QC, H1T 2M4, Canada
- Département d'ophtalmologie, Université de Montréal, Montréal, QC, H3C 3J7, Canada
- Institut de Génie Biomédical, Université de Montréal, Montréal, QC, H3C 3J7, Canada
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20
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Rampado O, Gianusso L, Costantino S, Rossetti V, Ropolo R. Radiation risk for multiple CT examinations in a large multi-specialist hospital: a potential role of total DLP from body series. Phys Med 2021. [DOI: 10.1016/s1120-1797(22)00081-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/19/2022] Open
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21
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Ambrosini S, Montecucco F, Kolijn D, Akhmedov A, Pedicino D, Mohammed S, Kiss A, Beltrami A, Crea F, Luescher T, Hamdani N, Costantino S, Paneni F. Targeting the methyltransferase setd7 prevents myocardial ischemic injury: a translational study. Eur Heart J 2021. [DOI: 10.1093/eurheartj/ehab724.3252] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Background
Despite appropriate revascularization strategies, a significant number of patients with myocardial infarction (MI) develop ischemic heart failure suggesting that breakthrough therapies are yet to be approved in this setting. Methylation of non-histone proteins is emerging as a central regulatory mechanism in health and disease. The methyltransferase SETD7 has shown to methylate and alter the function of a variety of proteins in vitro, however its function in the heart is poorly understood.
Purpose
In the present study we sought to determine the role of SETD7 in myocardial ischemic injury.
Methods
Neonatal rat ventricular myocytes (NRVM) were exposed to glucose deprivation (GD) for 15 h, in the presence of the selective SETD7 inhibitor [(R)-PFI-2] or its inactive enantiomer [(S)-PFI-2]. Western blot and real time PCR were employed to investigate the effects of energy stress on SETD7 and the Hippo pathway, while apoptosis and oxidative stress were assessed by Caspase-3 activity assay and mitochondrial swelling. YAP activity was assessed through chromatin immunoprecipitation assay (ChIP), its localization was examined by confocal microscopy while mono-methylation was assessed by immunoblotting. Expression of YAP-dependent antioxidant genes was assessed by western blot. SETD7 knockout (SETD7−/−) mice and wild-type (WT) littermates underwent ischemia/reperfusion (I/R) injury. Rats underwent permanent ligation of left anterior descending coronary artery (MI). Left ventricular (LV) myocardial samples were collected from mice undergoing I/R injury and patients with ischemic cardiomyopathy (ICM) and treated ex-vivo with (R)-PFI-2. SETD7 and antioxidant genes expression was assessed in peripheral blood mononuclear cells (PBMCs) from patients with ST-elevation MI (STEMI).
Results
We show that SETD7 is activated upon energy deprivation in cultured NRVMs and methylates the Hippo pathway effector YAP, leading to its cytosolic retention and impaired transcription of antioxidant genes. Pharmacological inhibition of SETD7 by (R)-PFI-2 restored YAP nuclear localization thus preventing mitochondrial reactive oxygen species (mtROS) and apoptosis. SETD7 deletion in mice attenuated I/R injury, mtROS and LV dysfunction by restoring YAP-dependent transcriptional programs. SETD7/YAP dysregulation was also observed in rats with MI and LV specimens from ICM patients. Of note, (R)-PFI-2 treatment prevented titin oxidation and myofilament stiffness in cardiomyocytes isolated from I/R mice and patients with ICM. Finally, SETD7 was upregulated in STEMI patients and its expression negatively correlated with antioxidant genes.
Conclusions
Targeting SETD7 may represent a valid therapeutic strategy to protect the heart during ischemia.
Funding Acknowledgement
Type of funding sources: Public Institution(s). Main funding source(s): University of Zurich
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Affiliation(s)
- S Ambrosini
- University of Zurich, Schlieren, Switzerland
| | | | - D Kolijn
- Ruhr University Bochum, Institute of Physiology, Bochum, Germany
| | - A Akhmedov
- University of Zurich, Schlieren, Switzerland
| | - D Pedicino
- Polyclinic Agostino Gemelli, Rome, Italy
| | - S Mohammed
- University of Zurich, Schlieren, Switzerland
| | - A Kiss
- Ludwig Boltzmann Cluster for Cardiovascular Research, Vienna, Austria
| | | | - F Crea
- Polyclinic Agostino Gemelli, Rome, Italy
| | - T Luescher
- University of Zurich, Schlieren, Switzerland
| | - N Hamdani
- Ruhr University Bochum, Institute of Physiology, Bochum, Germany
| | | | - F Paneni
- University of Zurich, Schlieren, Switzerland
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22
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Sayah DN, Mazzaferri J, Descovich D, Costantino S, Lesk MR. The Association Between Ocular Rigidity and Neuroretinal Damage in Glaucoma. Invest Ophthalmol Vis Sci 2021; 61:11. [PMID: 33151280 PMCID: PMC7671866 DOI: 10.1167/iovs.61.13.11] [Citation(s) in RCA: 10] [Impact Index Per Article: 3.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Abstract
Purpose Ocular rigidity (OR) is an important biomechanical property, thought to be relevant in the pathophysiology of open-angle glaucoma (OAG). This study aims to evaluate the relationship between OR and neuroretinal damage caused by glaucoma. Methods One hundred eight subjects (22 with healthy eyes, 23 with suspect discs, and 63 with OAG) were included in this study. OR was measured using a noninvasive optical coherence tomography (OCT)-based method developed by our group. We also measured central corneal thickness (CCT), corneal hysteresis (CH), and corneal resistance factor (CRF). Pearson and partial correlations were performed to evaluate the relationship between OR and glaucomatous damage represented by ganglion cell complex (GCC), retinal nerve fiber layer (RNFL) thicknesses, and neuroretinal rim area. Results Significant positive correlations were found between OR and minimum GCC thickness (r = 0.325, P = 0.001), average GCC thickness (r = 0.320, P = 0.002), rim area (r = 0.344, P < 0.001), and RNFL thickness in the superior (r = 0.225, P = 0.023), and inferior (r = 0.281, P = 0.004) quadrants. These correlations were generally greater than those found for CCT, CH, and CRF. Furthermore, no correlation was found between OR and corneal biomechanical parameters. After adjusting for age, sex, and ethnicity, significant correlations were found between OR and minimum and average GCC thickness (r = 0.357, P = 0.001 and r = 0.344, P = 0.001, respectively), rim area (r = 0.327, P = 0.001), average RNFL thickness (r = 0.331, P = 0.001), and RNFL thickness in the superior (r = 0.296, P = 0.003) and inferior (r = 0.317, P = 0.001) quadrants. Conclusions In this study, we found a positive correlation between structural OCT-based parameters and OR, indicating more neuroretinal damage in eyes with lower OR. These findings could provide insight into the pathophysiology of OAG.
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Affiliation(s)
- Diane N Sayah
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada
| | - Javier Mazzaferri
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada
| | - Denise Descovich
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada
| | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada.,Centre Universitaire d'ophtalmologie de l'Université de Montréal de l'Hôpital Maisonneuve-Rosemont, CIUSSS-E, Montreal, Quebec, Canada
| | - Mark R Lesk
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, Quebec, Canada.,Centre Universitaire d'ophtalmologie de l'Université de Montréal de l'Hôpital Maisonneuve-Rosemont, CIUSSS-E, Montreal, Quebec, Canada
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23
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Park M, Martínez Ramirez C, Yang Y, Blanchet-Cohen A, Kuasne H, Fortier A, Ragoussis J, Savage P, Omeroglou A, Meterissian S, Costantino S, Kleinman C. Abstract SP112: Spatial variance signatures/Intra-tumor zonation in TNBC. Cancer Res 2021. [DOI: 10.1158/1538-7445.sabcs20-sp112] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022]
Abstract
Abstract
It is increasingly clear that triple negative breast cancer (TNBC) is a heterogeneous disease with variable clinical presentation, histological features and response to therapy. While these differences have been partially explained by inter- and intra-tumoral heterogeneity, spatial heterogeneity represented by the tumor architecture plays a critical role in clonal evolution and displays a landscape for different compartment-specific processes and cell-to-cell specific interactions. To better understand the impact of spatial heterogeneity on gene-expression-defined cell populations, we have coupled single-cell RNA sequencing with multiplex immunofluorescence (IF). Multiplex immunofluorescence using specific markers for each cell cluster, integrated with computational image analyses and neighborhood maps, has revealed spatial zonation of single cell subpopulations. Zonation of single cell populations was coupled to hypoxia and overlayed distinct metabolic tumor zones and defined areas of differential stress and cell plasticity that give rise to tumor cells with enhanced fitness and aggressivity.
Citation Format: M Park, C Martínez Ramirez, Y Yang, A Blanchet-Cohen, H Kuasne, A Fortier, J Ragoussis, P Savage, A Omeroglou, S Meterissian, S Costantino, C Kleinman. Spatial variance signatures/Intra-tumor zonation in TNBC [abstract]. In: Proceedings of the 2020 San Antonio Breast Cancer Virtual Symposium; 2020 Dec 8-11; San Antonio, TX. Philadelphia (PA): AACR; Cancer Res 2021;81(4 Suppl):Abstract nr SP112.
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Affiliation(s)
- M Park
- 1Goodman Cancer Research Centre
| | | | - Y Yang
- 3Lady Davis Institute, Montreal, QC, Canada
| | | | - H Kuasne
- 2McGill University, Montreal, QC, Canada
| | - A Fortier
- 2McGill University, Montreal, QC, Canada
| | | | - P Savage
- 2McGill University, Montreal, QC, Canada
| | - A Omeroglou
- 5McGill University Health Centre, Montreal, QC, Canada
| | - S Meterissian
- 5McGill University Health Centre, Montreal, QC, Canada
| | | | - C Kleinman
- 3Lady Davis Institute, Montreal, QC, Canada
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24
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Mohammed S, Costantino S, Akhmedov A, Karsai G, Ambrosini S, Spinetti G, Madeddu P, Luscher T, Paneni F. A chromatin signature by the methyltransferase SETD7 regulates semaphorin-3G transcription and angiogenic response in diabetes: insights for personalized epigenetic therapies. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3757] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Despite advances in revascularization strategies, type 2 diabetic (T2D) patients with peripheral artery disease (PAD) continue to have a high risk of limb amputation. Modulation of blood vessel growth holds great promise for the treatment of PAD patients. Epigenetic modifications, namely histone post-translational modifications, have shown to regulate transcriptional programs implicated in the pathogenesis of cardiovascular disease.
Aim
To investigate the role of chromatin changes in regulating post-ischemic vascularization in experimental diabetes as well as in patients with T2D.
Methods
Experiments were performed in primary human aortic endothelial cells (HAECs), double-mutant leptin deficient mice (Lepdb/db) carrying a genetic deletion of the methyltransferase SETD7 (Setd7−/−Lepdb/db) as well as in gastrocnemius muscle samples from T2D patients with PAD and age-matched non-diabetic controls. Unbiased gene expression profiling was performed by RNA sequencing (RNA-seq) followed by Ingenuity Pathway Analysis (IPA). Pharmacological blockade of SETD7 was performed by using the selective inhibitor (R)-PFI-2. Scratch and tube formation assays were performed to investigate the impact of SETD7 on angiogenic response.
Results
RNA-seq in high glucose-treated HAECs revealed a profound upregulation of the methyltransferase SETD7 (fold change 2.8, p<0.001), an enzyme involved in mono-methylation of lysine 4 at histone 3 (H3K4me1). Both SETD7 gene silencing and pharmacological inhibition by (R)PFI-2 rescued hyperglycemia-induced impairment of HAECs migration and tube formation, while SETD7 overexpression blunted the angiogenic response. RNA-seq and Chromatin Immunoprecipitation (ChIP) assays showed that SETD7-dependent H3K4me1 regulates the transcription of the angiogenesis inhibitor semaphorin-3G (SEMA-3G). Increased SEMA-3G transcript was associated with enhanced secretion from HAECs. Co-immunofluorescence experiments showed that SEMA-3G blunts the angiogenic response by competing with VEGF receptors VEGFR/Neuropillin2. Moreover, SEMA-3G overexpression blunted migration and tube formation in SETD7-depleted HAECs. SETD7 and SEMA-3G were significantly upregulated in endothelial cells from Lepdb/db mice, whereas SEMA-3G transcription was blunted in Setd7−/−Lepdb/db animals. Consistently, endothelial sprouting was defective in aortas from Lepdb/db as compared to WT mice, whereas Setd7−/−Lepdb/db mice displayed a preserved angiogenic response. Of clinical relevance, SETD7/SEMA-3G axis was upregulated in gastrocnemius muscle specimens from T2D patients with PAD as compared with non-diabetic controls.
Conclusion
In HAECs, genetically modified mice and T2D patients we show that SETD7-dependent chromatin changes regulate SEMA-3G transcription and angiogenic response. Pharmacological inhibition of SETD7 may represent a novel epigenetic therapy to boost neovascularization in T2D patients with PAD.
Funding Acknowledgement
Type of funding source: Public Institution(s). Main funding source(s): University of Zurich/Universitätsspital Zürich
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Affiliation(s)
| | | | - A Akhmedov
- University of Zurich, Zurich, Switzerland
| | - G Karsai
- Universitätsspital Zürich, Institute for Clinical Chemistry, Zürich (Zürich), Switzerland
| | | | - G Spinetti
- Cardiovascular research unit, IRCCS Multimedica, Milan, Italy
| | - P Madeddu
- University of Bristol, Bristol Royal Infirmary, London, United Kingdom
| | - T.F Luscher
- Royal Brompton and Harefield Hospital Trust, Research, Education & Development, London, United Kingdom
| | - F Paneni
- University Hospital Zurich, Zurich, Switzerland
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25
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Suades R, Hussain S, Khan A, Costantino S, Paneni F, Cosentino F. miR-673/menin/JunD axis modulates hyperglycemia-induced oxidative stress and inflammation in the diabetic heart. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3586] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Background
Hyperglycemia-induced reactive oxygen species generation in diabetic heart contributes to myocardial dysfunction. JunD, a member of the activated protein 1 (AP-1) family of transcription factors, is emerging as a major gatekeeper against oxidative stress. Previous studies have shown that downregulation of AP-1 transcription factor JunD is involved in vascular aging and heart failure. However, the role of JunD in diabetes-induced myocardial dysfunction is unknown.
Purpose
The present study was designed to investigate whether hyperglycemia-driven epigenetic regulation of JunD contributes to oxidative stress, inflammation and myocardial dysfunction in the diabetic heart.
Methods
Diabetes (DB) was induced in C57BL/6 wild-type (WT) mice by streptozotocin. After four weeks of DB, left ventricular (LV) function was assessed by standard and 2D speckle-tracking echocardiography in both groups (n=10). Then, the animals were euthanized and LV specimens were collected to determine JunD mRNA and protein expression as well as superoxide anion production by ESR spectroscopy. Chromatin modifications of JunD gene promoter were assessed by chromatin immunoprecipitation. Isolated DNA was analyzed for promoter methylation following Methylminer kit. Cardiac biopsies were collected from age-matched patients with and without diabetes.
Results
DB mice showed LV dysfunction with reduced ejection fraction and fractional shortening. JunD mRNA and protein expression were reduced in the myocardium of DB as compared to control mice. JunD downregulation was associated with oxidative stress, increased NF-kB binding activity and expression of inflammatory mediators. Accordingly, expression of free radical scavenger superoxide dismutase 1 and aldehyde dehydrogenase 2 was reduced, whereas nicotinamide adenine dinucleotide phosphate oxidase subunits NOX2 and NOX4 were upregulated in DB. A reduction of JunD mRNA and protein expression was confirmed in LV specimens obtained from patients with diabetes. The downregulation of JunD was epigenetically regulated by promoter hypermethylation and histone modifications. Post-translational repression by tumor suppressor menin also contributed to JunD downregulation. Indeed, menin was significantly upregulated in DB hearts and co-immunoprecipitation experiments confirmed the binding of menin to JunD. Furthermore, rat ventricular myocytes exposed to high glucose (HG) showed increased menin expression. We found that miR-673 targeting menin was downregulated in hearts of DB mice. Reprogramming miR-673 in HG-treated myocytes was able to restore both menin and JunD expression to control levels.
Conclusions
Our findings show that downregulation of AP-1 transcription factor JunD contributes to diabetes-induced myocardial dysfunction and miR-673/menin/JunD represents a novel molecular axis involved in hyperglycemia-induced ROS-driven cardiac damage.
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): European Society of Cardiology (ESC) Research Grant 2017
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Affiliation(s)
- R Suades
- Karolinska Institute, Cardiology Unit, Department of Medicine - Solna, Stockholm, Sweden
| | - S Hussain
- Karolinska Institute, Cardiology Unit, Department of Medicine - Solna, Stockholm, Sweden
| | - A.W Khan
- Karolinska Institute, Cardiology Unit, Department of Medicine - Solna, Stockholm, Sweden
| | - S Costantino
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - F Cosentino
- Karolinska Institute, Cardiology Unit, Department of Medicine - Solna, Stockholm, Sweden
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26
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Ambrosini S, Montecucco F, Akhmedov A, Mohammed S, Brown P, Rossi F, Kiss A, Luscher T, Costantino S, Paneni F. Methylation of the hippo signalling effector YAP by SETD7 drives myocardial ischemic injury. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Myocardial ischemia/reperfusion (I/R) injury is one of the most deleterious cardiovascular conditions and a leading cause of mortality. The Hippo pathway effector YAP critically regulates cardiomyocyte proliferation and survival during myocardial I/R injury. However, the mechanisms regulating YAP activation in this setting remain poorly understood. Post-translational modifications of proteins, namely methylation, modulate pathways implicated in myocardial I/R injury. The methyltransferase SETD7 is emerging as a regulator of cell survival via methylation of histone and non-histone proteins. Whether SETD7 participates to myocardial I/R injury remains elusive.
Purpose
To investigate the role of SETD7 in regulating Hippo signaling during myocardial I/R injury.
Methods
Neonatal rat ventricular myocytes (NRVM) were exposed to normal glucose levels or glucose deprivation (GD) for 15 h, in the presence of the selective SETD7 inhibitor [(R)-PFI-2] or its inactive enantiomer [(S)-PFI-2]. Western blot and real time PCR were employed to investigate the effects of energy stress on SETD7 and the Hippo pathway, while apoptosis was assessed by Caspase-3 activity assay. YAP activity was assessed through chromatin immunoprecipitation assay (ChIP), its localization was examined by confocal microscopy while mono-methylation was assessed by immunoblotting. SETD7 knockout (SETD7−/−) mice and wild-type (WT) littermates (male, 8–12 weeks old) underwent 1 h of left anterior descending (LAD) coronary artery ligation followed by 24 h of reperfusion. Infarct size was assessed by TTC staining and shown as infarct size per ventricle surface (I/V). Cardiac function was investigated at 24h by conventional and Tissue Doppler Imaging (TDI) echocardiography.
Results
GD in NRVMs led to upregulation of SETD7 and physical interaction with the pro-survival transcriptional cofactor YAP, resulting in its direct mono-methylation. Furthermore SETD7-dependent methylation of YAP led to its cytosolic retention and subsequent reduction of YAP binding to the promoter of pro-survival genes. Of note, pharmacological inhibition of SETD7 by (R)-PFI-2 blunted YAP mono-methylation while restoring its nuclear retention. Mechanistically, SETD7 inhibition promoted YAP binding to catalase and superoxide dismutase (SOD) gene promoters, thus preventing GD-induced mitochondrial oxidative stress and apoptosis. In line with our in vitro findings, SETD7−/− mice showed decreased infarct size as compared to WT littermates and preserved cardiac systolic (ejection fraction, fractional shortening) and diastolic function, as assessed by both conventional and TDI echocardiography.
Conclusions
We show that SETD7-dependent methylation of YAP is required for its inactivation, thus leading to myocyte oxidative stress and apoptosis. Pharmacological modulation of SETD7 by (R)-PFI-2 may represent a new therapeutic approach to prevent myocardial ischemic damage through modulation of the Hippo pathway.
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): Swiss Heart Foundation
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Affiliation(s)
- S Ambrosini
- University of Zurich, Schlieren, Switzerland
| | | | - A Akhmedov
- University of Zurich, Schlieren, Switzerland
| | | | - P Brown
- University of Toronto, Toronto, Canada
| | - F Rossi
- University of British Columbia, Vancouver, Canada
| | - A Kiss
- Medical University of Vienna, Vienna, Austria
| | - T.F Luscher
- University of Zurich, Schlieren, Switzerland
| | | | - F Paneni
- University of Zurich, Schlieren, Switzerland
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27
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Simeone P, Costantino S, Tripaldi R, Liani R, Ciotti S, Tartaro A, Guagnano M, Cosentino F, Consoli A, Paneni F, Santilli F. Baseline interleukin1beta expression in peripheral blood monocytes predicts the extent of weight loss and nonalcoholic fatty liver improvement in obese subjects with prediabetes or type 2 diabetes. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Background
Non-alcoholic fatty liver disease (NAFLD) represents a hallmark of metabolic syndrome. Interleukin-1β (IL-1β), a well-studied cytokine involved in obesity-related systemic inflammation as well as in the pathogenesis of type 2 diabetes (T2D), promotes hepatic steatosis by stimulating triglycerides and cholesterol accumulation in primary liver hepatocytes and lipid droplets formation. The most compelling evidence for a major role for IL-1β in metabolic imbalance and inflammation comes from the recent Canakinumab Anti-inflammatory Thrombosis Outcome (CANTOs)trial, where inhibition of IL-1β pathway was associated with a reduction of cardiovascular events in high-risk patients.
Purpose
The present study was designed to determine: i)whether an equal degree of weight loss by liraglutide or lifestyle changes has a different impact on NAFLD extent and IL-1β expression in peripheral blood mononuclear cells from obese subjects with prediabetes or early T2D; ii)whether baseline IL-1β levels may predict the extent of weight loss and related metabolic changes.
Methods
Thirty-two metformin-treated obese subjects with prediabetes [impaired fasting glucose (IFG) or impaired glucose tolerance (IGT) or both (n=16)] or newly diagnosed T2D (n=16), were randomized to the glucagon-like peptide receptor agonist (GLP-RA) liraglutide (1.8 mg/d) or lifestyle counselling until achieving a modest and comparable weight loss (−7% of initial body weight). Visceral (VAT) and adipose tissue distribution were assessed by magnetic resonance. Gene expression of IL-1β in peripheral blood mononuclear cells was assessed by real time PCR.
Results
At baseline, IL-1β positively correlated to body mass index (BMI) (rho=0.421, p=0.016), fasting plasma glucose (rho=0.415, p=0.018), HbA1c (rho=0.349, p=0.050), VAT (rho=0.388, p=0.028), NAFLD (rho=0.454, p=0.009), platelet count (rho=0.510, p=0.003), chemerin (rho=0.455, p=0.009) and interleukin-1 receptor agonist (IL1-RA) (rho=0.519, p=0.002). After achievement of the weight loss target in the two groups, a comparable reduction of IL-1 β (p<0.001 lifestyle changes; p=0.029 liraglutide treatment) was observed in both arms, in parallel with a comparable improvement in glycaemic control, C-reactive protein (CRP),BMI and NAFLD. Furthermore, basal levels of IL-1β correlated directly with delta BMI (p=0.015) and delta NAFLD (p=0.002) (Figure 1).
Conclusion
In obese patients with initial impairment of glucose metabolism, IL-β-driven inflammation correlates with glycaemic control, adipose tissue distribution and platelet count. Successful weight loss, achieved with either lifestyle changes or an incretin-based therapy, is associated with a significant reduction of both IL-1β levels and NAFLD degree. Of interest, basal levels of IL-1β predicts the extent of weight loss and NAFLD improvement, regardless of the intervention. Our results may set the stage for ad-hoc studies investigating the usefulness of baseline IL-1β a levels as a drug-response biomarker.
Figure 1
Funding Acknowledgement
Type of funding source: Public Institution(s). Main funding source(s): This study was supported by a grant from the Italian Ministry of University and Research (PRIN no. 2010JS3PMZ to F.S.).
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Affiliation(s)
- P.G Simeone
- G. d Annunzio University, Department of Medicine and Aging, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - S Costantino
- University Hospital Zurich, Center for Molecular Cardiology and Department of Cardiology, Zurich, Switzerland
| | - R Tripaldi
- G. d Annunzio University, Department of Medicine and Aging, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - R Liani
- G. d Annunzio University, Department of Medicine and Aging, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - S Ciotti
- G. d Annunzio University, Department of Medicine and Aging, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - A Tartaro
- University of Chieti-Pescara, Department of Neuroscience & Imaging, Chieti, Italy
| | - M.T Guagnano
- G. d Annunzio University, Department of Medicine and Aging, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - F Cosentino
- Karolinska University Hospital, Cardiology Unit, Department of Medicine., Stockholm, Sweden
| | - A Consoli
- G. d Annunzio University, Department of Medicine and Aging, Center for Advanced Studies and Technology (CAST), Chieti, Italy
| | - F Paneni
- University Hospital Zurich, Center for Molecular Cardiology and Department of Cardiology, Zurich, Switzerland
| | - F Santilli
- G. d Annunzio University, Department of Medicine and Aging, Center for Advanced Studies and Technology (CAST), Chieti, Italy
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Vdovenko D, Wijnen W, Zarak Crnkovic M, Blyszczuk P, Bachmann M, Costantino S, Paneni F, Camici G, Luescher T, Eriksson U. IL-23 promotes T-cell mediated cardiac inflammation but protects the heart from fibrosis. Eur Heart J 2020. [DOI: 10.1093/ehjci/ehaa946.3725] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Cardiac inflammation varies widely and, in some cases, triggers autoimmune myocarditis and further inflammatory dilated cardiomyopathy (iDCM) and heart failure. In children, myocarditis leads to cardiomyopathy in almost half of affected individuals and up to 20% of sudden death cases in young adults have been reported to be due to myocarditis. IL-12 and IL-23 belong to the same family of cytokines known to mediate inflammatory conditions. Both regulate the differentiation of T cells: IL-12 promotes towards IFN-gamma-producing Th-1 cells, while IL-23 induces IL-17-producing Th-17 cells. Heart-reactive CD4+Th17 cells play a leading role in the development of myocarditis, however, literature reports excessiveness of IL-23 in Th17-derived IL-17 production. Therapeutic strategies blocking IL-23 were suggested as a promising approach, though the specific role of IL-23 in pathogenesis is unclear and the long-term perspectives stay elusive.
Purpose
We aim to explore the role IL-23 compared to IL-12 in the manifestation of cardiac autoimmune myocarditis.
Methodology
We use dendritic cell (DC) model of experimental autoimmune myocarditis in IL-12 and IL-23-deficient mice. Mice were injected with bone marrow-derived in vitro activated and loaded with cardiac-specific peptide DCs. This model mimics natural processes taking place during heart inflammation and provides a unique method to address the role of DCs-derived cytokines. Cardiac inflammation, as well as remodeling and heart function, were analysed at the acute and chronic stages of the disease.
Results
Surprisingly, all mice developed acute myocarditis, though wt receiving IL-23−/−bmDCs showed a twofold decrease in heart-infiltrating T cells and lower numbers of Th17 population. Further decrease of heart-infiltrating T cells appeared upon total systemic IL-23 deficiency. In comparison to IL-12, directly inducing differentiation of IFN-gamma–producing Th1, IL-23 cannot induce Th17 differentiation. None of the two cytokines affect proliferation, though, IL-23 activates T cell migratory potential and increases T cell migration by twofold. At the same time, deficiency of IL-23-production by bmDCs leads to lower migration of T cells. We also show an involvement of RhoA, and the other Rho GTPases, in the mechanism of migration as blocking revoke the IL-23 effect on T cells. Moreover, we further observed more fibrosis and worse heart functioning in IL-23−/−, but not IL-12−/− mice at the chronic stage what underlines the importance of IL-23-dependent T cell trafficking in the resolution of the acute stage of autoimmune myocarditis.
Conclusion
Our observations underline IL-23 as an important cytokine responsible for T cell trafficking and resolution of the inflammation in autoimmune myocarditis. Therapeutic approaches involving inflammatory cytokine targeting are a promising clinical perspective though IL-23 deficiency might lead to increased cardiac remodeling and iDCM progression.
Funding Acknowledgement
Type of funding source: Foundation. Main funding source(s): The Swiss National Science Foundation
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Affiliation(s)
- D Vdovenko
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - W.J Wijnen
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - M Zarak Crnkovic
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - P Blyszczuk
- University Hospital Zurich, Department of Rheumatology, Zurich, Switzerland
| | - M Bachmann
- GZO Zurich Regional Health Center, Department of Medicine, Wetzikon, Switzerland
| | - S Costantino
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - G.G Camici
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - T.F Luescher
- University of Zurich, Center for Molecular Cardiology, Zurich, Switzerland
| | - U Eriksson
- GZO Zurich Regional Health Center, Department of Medicine, Wetzikon, Switzerland
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29
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Sayah DN, Szigiato AA, Mazzaferri J, Descovich D, Duval R, Rezende FA, Costantino S, Lesk MR. Correlation of ocular rigidity with intraocular pressure spike after intravitreal injection of bevacizumab in exudative retinal disease. Br J Ophthalmol 2020; 105:392-396. [PMID: 32345604 DOI: 10.1136/bjophthalmol-2019-315595] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Revised: 04/03/2020] [Accepted: 04/07/2020] [Indexed: 11/04/2022]
Abstract
BACKGROUND/AIMS To evaluate the non-invasive measurement of ocular rigidity (OR), an important biomechanical property of the eye, as a predictor of intraocular pressure (IOP) elevation after anti-vascular endothelial growth factor (anti-VEGF) intravitreal injection (IVI). METHODS Subjects requiring IVI of anti-VEGF for a pre-existing retinal condition were enrolled in this prospective cross-sectional study. OR was assessed in 18 eyes of 18 participants by measurement of pulsatile choroidal volume change using video-rate optical coherence tomography, and pulsatile IOP change using dynamic contour tonometry. IOP was measured using Tono-Pen XL before and immediately following the injection and was correlated with OR. RESULTS The average increase in IOP following IVI was 19±9 mm Hg, with a range of 7-33 mm Hg. The Spearman correlation coefficient between OR and IOP elevation following IVI was 0.796 (p<0.001), showing higher IOP elevation in more rigid eyes. A regression line was also calculated to predict the IOP spike based on the OR coefficient, such that IOP spike=664.17 mm Hg·µL×OR + 4.59 mm Hg. CONCLUSION This study shows a strong positive correlation between OR and acute IOP elevation following IVI. These findings indicate that the non-invasive measurement of OR could be an effective tool in identifying patients at risk of IOP spikes following IVI.
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Affiliation(s)
- Diane N Sayah
- Ophthalmology, Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada.,Ophthalmology, University of Montreal, Montreal, Quebec, Canada
| | | | - Javier Mazzaferri
- Ophthalmology, Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada
| | - Denise Descovich
- Ophthalmology, Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada
| | - Renaud Duval
- Ophthalmology, Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada.,Ophthalmology, University of Montreal, Montreal, Quebec, Canada
| | - Flavio A Rezende
- Ophthalmology, Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada.,Ophthalmology, University of Montreal, Montreal, Quebec, Canada
| | - Santiago Costantino
- Ophthalmology, Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada.,Ophthalmology, University of Montreal, Montreal, Quebec, Canada
| | - Mark R Lesk
- Ophthalmology, Maisonneuve-Rosemont Hospital Research Centre, Montreal, Quebec, Canada .,Ophthalmology, University of Montreal, Montreal, Quebec, Canada
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30
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Sayah DN, Zhou TE, Omri S, Mazzaferri J, Quiniou C, Wirth M, Côté F, Dabouz R, Desjarlais M, Costantino S, Chemtob S. Novel Anti-Interleukin-1β Therapy Preserves Retinal Integrity: A Longitudinal Investigation Using OCT Imaging and Automated Retinal Segmentation in Small Rodents. Front Pharmacol 2020; 11:296. [PMID: 32226385 PMCID: PMC7081735 DOI: 10.3389/fphar.2020.00296] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/16/2019] [Accepted: 02/27/2020] [Indexed: 12/16/2022] Open
Abstract
Retinopathy of prematurity (ROP) is the leading cause of blindness in neonates. Inflammation, in particular interleukin-1β (IL-1β), is increased in early stages of the disorder, and contributes to inner and outer retinal vasoobliteration in the oxygen-induced retinopathy (OIR) model of ROP. A small peptide antagonist of IL-1 receptor, composed of the amino acid sequence, rytvela, has been shown to exert beneficial anti-inflammatory effects without compromising immunovigilance-related NF-κB in reproductive tissues. We conducted a longitudinal study to determine the efficacy of “rytvela” in preserving the integrity of the retina in OIR model, using optical coherence tomography (OCT) which provides high-resolution cross-sectional imaging of ocular structures in vivo. Sprague–Dawley rats subjected to OIR and treated or not with “rytvela” were compared to IL-1 receptor antagonist (Kineret). OCT imaging and custom automated segmentation algorithm used to measure retinal thickness (RT) were obtained at P14 and P30; gold-standard immunohistochemistry (IHC) was used to confirm retinal anatomical changes. OCT revealed significant retinal thinning in untreated animals by P30, confirmed by IHC; these changes were coherently associated with increased apoptosis. Both rytvela and Kineret subsided apoptosis and preserved RT. As anticipated, Kineret diminished both SAPK/JNK and NF-κB axes, whereas rytvela selectively abated the former which resulted in preserved monocyte phagocytic function. Altogether, OCT imaging with automated segmentation is a reliable non-invasive approach to study longitudinally retinal pathology in small animal models of retinopathy.
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Affiliation(s)
- Diane N Sayah
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Tianwei E Zhou
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada.,Faculty of Medicine, McGill University, Montreal, QC, Canada
| | - Samy Omri
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | | | - Christiane Quiniou
- Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine Research Center, Université de Montréal, Montreal, QC, Canada
| | - Maëlle Wirth
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - France Côté
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Rabah Dabouz
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada.,Faculty of Medicine, McGill University, Montreal, QC, Canada
| | - Michel Desjarlais
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Santiago Costantino
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada
| | - Sylvain Chemtob
- Hopital Maisonneuve-Rosemont Research Center, Montreal, QC, Canada.,Department of Ophthalmology, Faculty of Medicine, Université de Montréal, Montreal, QC, Canada.,Department of Pediatrics, Centre Hospitalier Universitaire Sainte-Justine Research Center, Université de Montréal, Montreal, QC, Canada
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31
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Sen Nkwe N, Daou S, Uriarte M, Gagnon J, Iannantuono NV, Barbour H, Yu H, Masclef L, Fernández E, Zamorano Cuervo N, Mashtalir N, Binan L, Sergeev M, Bélanger F, Drobetsky E, Milot E, Wurtele H, Costantino S, Affar EB. A potent nuclear export mechanism imposes USP16 cytoplasmic localization during interphase. J Cell Sci 2020; 133:jcs239236. [PMID: 32005696 DOI: 10.1242/jcs.239236] [Citation(s) in RCA: 9] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/17/2019] [Accepted: 01/13/2020] [Indexed: 01/09/2023] Open
Abstract
USP16 (also known as UBP-M) has emerged as a histone H2AK119 deubiquitylase (DUB) implicated in the regulation of chromatin-associated processes and cell cycle progression. Despite this, available evidence suggests that this DUB is also present in the cytoplasm. How the nucleo-cytoplasmic transport of USP16, and hence its function, is regulated has remained elusive. Here, we show that USP16 is predominantly cytoplasmic in all cell cycle phases. We identified the nuclear export signal (NES) responsible for maintaining USP16 in the cytoplasm. We found that USP16 is only transiently retained in the nucleus following mitosis and then rapidly exported from this compartment. We also defined a non-canonical nuclear localization signal (NLS) sequence that plays a minimal role in directing USP16 into the nucleus. We further established that this DUB does not accumulate in the nucleus following DNA damage. Instead, only enforced nuclear localization of USP16 abolishes DNA double-strand break (DSB) repair, possibly due to unrestrained DUB activity. Thus, in contrast to the prevailing view, our data indicate that USP16 is actively excluded from the nucleus and that this DUB might indirectly regulate DSB repair.This article has an associated First Person interview with the first author of the paper.
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Affiliation(s)
- Nadine Sen Nkwe
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
| | - Salima Daou
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Lunenfeld-Tanenbaum Research Institute, Sinai Health System, Toronto, ON M5G 1X5, Canada
| | - Maxime Uriarte
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
| | - Jessica Gagnon
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Institute for Research in Immunology and Cancer, University of Montréal, Montréal, QC H3T 1J4, Canada
| | - Nicholas Victor Iannantuono
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Institute for Research in Immunology and Cancer, University of Montréal, Montréal, QC H3T 1J4, Canada
| | - Haithem Barbour
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
| | - Helen Yu
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Developmental and Stem Cell Biology Program and Arthur and Sonia Labatt Brain Tumor Research Centre, Hospital for Sick Children, Toronto, ON M5G 0A4, Canada
| | - Louis Masclef
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
| | - Erlinda Fernández
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
| | - Natalia Zamorano Cuervo
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- CRCHUM-Centre Hospitalier de l'Université de Montréal, 900 rue Saint Denis, Montréal, QC H2X 0A9, Canada
| | - Nazar Mashtalir
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Department of Pediatric Oncology, Dana-Farber Cancer Institute and Harvard Medical School, Boston, MA 02215, USA
- Broad Institute of MIT and Harvard, Cambridge, MA 02142, USA
| | - Loïc Binan
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Department of Ophthalmology, University of Montréal, Montréal, Québec, Canada
| | - Mikhail Sergeev
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
| | - François Bélanger
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
| | - Elliot Drobetsky
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Department of Medicine, University of Montréal, Montréal H3C 3J7, Québec, Canada
| | - Eric Milot
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Department of Medicine, University of Montréal, Montréal H3C 3J7, Québec, Canada
| | - Hugo Wurtele
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Department of Medicine, University of Montréal, Montréal H3C 3J7, Québec, Canada
| | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Department of Ophthalmology, University of Montréal, Montréal, Québec, Canada
| | - El Bachir Affar
- Maisonneuve-Rosemont Hospital Research Center, Montréal, QC H1T 2M4, Canada
- Department of Medicine, University of Montréal, Montréal H3C 3J7, Québec, Canada
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Viallard C, Audiger C, Popovic N, Akla N, Lanthier K, Legault-Navarrete I, Melichar H, Costantino S, Lesage S, Larrivée B. BMP9 signaling promotes the normalization of tumor blood vessels. Oncogene 2020; 39:2996-3014. [PMID: 32042114 DOI: 10.1038/s41388-020-1200-0] [Citation(s) in RCA: 18] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2019] [Revised: 01/10/2020] [Accepted: 01/29/2020] [Indexed: 01/09/2023]
Abstract
The presence of an immature tumor vascular network contributes to cancer dissemination and the development of resistance to therapies. Strategies to normalize the tumor vasculature are therefore of significant therapeutic interest for cancer treatments. VEGF inhibitors are used clinically to normalize tumor blood vessels. However, the time frame and dosage of these inhibitors required to achieve normalization is rather narrow, and there is a need to identify additional signaling targets to attain vascular normalization. In addition to VEGF, the endothelial-specific receptor Alk1 plays a critical role in vascular development and promotes vascular remodeling and maturation. Therefore, we sought to evaluate the effects of the Alk1 ligand BMP9 on tumor vascular formation. BMP9 overexpression in Lewis Lung Carcinoma (LLC) tumors significantly delayed tumor growth. Blood vessels in BMP9-overexpressing LLC tumors displayed markers of vascular maturation and were characterized by increased perivascular cell coverage. Tumor vasculature normalization was associated with decreased permeability and increased perfusion. These changes in vascular function in BMP9-overexpressing LLC tumors resulted in significant alterations of the tumor microenvironment, characterized by a decrease in hypoxia and an increase in immune infiltration. In conclusion, we show that BMP9 promotes vascular normalization in LLC tumors that leads to changes in the microenvironment.
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Affiliation(s)
- Claire Viallard
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.,Département de Biologie Moléculaire, Université de Montréal, Montréal, QC, Canada
| | - Cindy Audiger
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.,Département de Microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, QC, Canada
| | - Natalija Popovic
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.,Département de Biologie Moléculaire, Université de Montréal, Montréal, QC, Canada
| | - Naoufal Akla
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.,Département de Biochimie, Université de Montréal, Montréal, QC, Canada
| | - Kevin Lanthier
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.,Département de Biologie Moléculaire, Université de Montréal, Montréal, QC, Canada
| | | | - Heather Melichar
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.,Département de Médecine, Université de Montréal, Montréal, QC, Canada
| | - Santiago Costantino
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.,Département d'Ophtalmologie, Université de Montréal, Montréal, QC, Canada
| | - Sylvie Lesage
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada.,Département de Microbiologie, infectiologie et immunologie, Université de Montréal, Montréal, QC, Canada
| | - Bruno Larrivée
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, QC, Canada. .,Département de Biologie Moléculaire, Université de Montréal, Montréal, QC, Canada. .,Département d'Ophtalmologie, Université de Montréal, Montréal, QC, Canada.
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Desjardins-Lecavalier N, Binan L, Roy J, Costantino S. Motility-Based Single-Cell Capture and Expansion from a Heterogeneous Cell Culture. Biophys J 2020. [DOI: 10.1016/j.bpj.2019.11.1758] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022] Open
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34
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Sayah DN, Mazzaferri J, Ghesquière P, Duval R, Rezende F, Costantino S, Lesk MR. Non-invasive in vivo measurement of ocular rigidity: Clinical validation, repeatability and method improvement. Exp Eye Res 2020; 190:107831. [DOI: 10.1016/j.exer.2019.107831] [Citation(s) in RCA: 12] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2019] [Revised: 09/05/2019] [Accepted: 10/04/2019] [Indexed: 11/28/2022]
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35
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Jessa S, Blanchet-Cohen A, Krug B, Vladoiu M, Coutelier M, Faury D, Poreau B, De Jay N, Hébert S, Monlong J, Farmer WT, Donovan LK, Hu Y, McConechy MK, Cavalli FMG, Mikael LG, Ellezam B, Richer M, Allaire A, Weil AG, Atkinson J, Farmer JP, Dudley RWR, Larouche V, Crevier L, Albrecht S, Filbin MG, Sartelet H, Lutz PE, Nagy C, Turecki G, Costantino S, Dirks PB, Murai KK, Bourque G, Ragoussis J, Garzia L, Taylor MD, Jabado N, Kleinman CL. Stalled developmental programs at the root of pediatric brain tumors. Nat Genet 2019; 51:1702-1713. [PMID: 31768071 PMCID: PMC6885128 DOI: 10.1038/s41588-019-0531-7] [Citation(s) in RCA: 110] [Impact Index Per Article: 22.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2019] [Accepted: 10/18/2019] [Indexed: 02/08/2023]
Abstract
Childhood brain tumors have suspected prenatal origins. To identify vulnerable developmental states, we generated a single-cell transcriptome atlas of >65,000 cells from embryonal pons and forebrain, two major tumor locations. We derived signatures for 191 distinct cell populations and defined regional cellular diversity and differentiation dynamics. Projection of bulk tumor transcriptomes onto this dataset shows that WNT medulloblastomas match the rhombic lip-derived mossy fiber neuronal lineage, embryonal tumors with multilayered rosettes fully recapitulate a neuronal lineage, while Group 2a/b atypical teratoid/rhabdoid tumors may originate outside of the neuroectoderm. Importantly, single-cell tumor profiles reveal highly defined cell hierarchies mirroring transcriptional programs of the corresponding normal lineages. Our findings identify impaired differentiation of specific neural progenitors as a common mechanism underlying these pediatric cancers and provide a rational framework for future modeling and therapeutic interventions.
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Affiliation(s)
- Selin Jessa
- Quantitative Life Sciences, McGill University, Montreal, Quebec, Canada.,Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada
| | - Alexis Blanchet-Cohen
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Brian Krug
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Maria Vladoiu
- Developmental and Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada.,The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Marie Coutelier
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Damien Faury
- Department of Pediatrics, McGill University, Montreal, Quebec, Canada.,The Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
| | - Brice Poreau
- Department of Pediatrics, McGill University, Montreal, Quebec, Canada.,The Research Institute of the McGill University Health Center, Montreal, Quebec, Canada.,Service de Génétique et Procréation, Centre Hospitalier Universitaire, Grenoble-Alpes, Grenoble, France
| | - Nicolas De Jay
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Steven Hébert
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | - Jean Monlong
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.,UC Santa Cruz Genomics Institute, University of California, Santa Cruz, CA, USA
| | - W Todd Farmer
- Centre for Research in Neuroscience, Brain Repair and Integrative Neuroscience Program, The Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, Quebec, Canada.,Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Laura K Donovan
- Developmental and Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada.,The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Yixing Hu
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada.,Department of Human Genetics, McGill University, Montreal, Quebec, Canada
| | | | - Florence M G Cavalli
- Developmental and Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada.,The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada
| | - Leonie G Mikael
- Department of Pediatrics, McGill University, Montreal, Quebec, Canada.,The Research Institute of the McGill University Health Center, Montreal, Quebec, Canada
| | - Benjamin Ellezam
- Department of Pathology, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, Montreal, Quebec, Canada
| | - Maxime Richer
- Department of Pathology, Centre Hospitalier Universitaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Andréa Allaire
- Department of Pathology, Centre Hospitalier Universitaire de Sherbrooke, Université de Sherbrooke, Sherbrooke, Quebec, Canada
| | - Alexander G Weil
- Department of Pediatric Neurosurgery, Centre Hospitalier Universitaire Sainte-Justine, Université de Montréal, Montreal, Quebec, Canada
| | - Jeffrey Atkinson
- Department of Pediatric Surgery, Division of Neurosurgery, Montreal Children's Hospital, McGill University, Montreal, Querbec, Canada
| | - Jean-Pierre Farmer
- Department of Pediatric Surgery, Division of Neurosurgery, Montreal Children's Hospital, McGill University, Montreal, Querbec, Canada
| | - Roy W R Dudley
- Department of Pediatric Surgery, Division of Neurosurgery, Montreal Children's Hospital, McGill University, Montreal, Querbec, Canada
| | - Valerie Larouche
- Department of Pediatrics, Centre mère-enfant Soleil du CHU de Québec-Université Laval, Quebec City, Quebec, Canada
| | - Louis Crevier
- Department of Surgery, Université de Laval, Quebec City, Quebec, Canada
| | - Steffen Albrecht
- Department of Pathology, Montreal Children's Hospital, McGill University Health Center, Montreal, Quebec, Canada
| | - Mariella G Filbin
- Department of Pediatric Oncology, Dana-Farber/Boston Children's Cancer and Blood Disorder Center, Boston, MA, USA
| | - Hervé Sartelet
- Department of Pathology, Centre Hospitalier Universitaire de Grenoble, Grenoble, France
| | - Pierre-Eric Lutz
- Centre National de la Recherche Scientifique, Institut des Neurosciences Cellulaires et Intégratives, Université de Strasbourg, Fédération de Médecine Translationnelle de Strasbourg, Strasbourg, France.,Department of Psychiatry, McGill University, Montreal, Quebec, Canada.,Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
| | - Corina Nagy
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada.,Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
| | - Gustavo Turecki
- Department of Psychiatry, McGill University, Montreal, Quebec, Canada.,Douglas Mental Health University Institute, McGill University, Montreal, Quebec, Canada
| | - Santiago Costantino
- Maisonneuve-Rosemont Hospital Research Center, Montreal, Quebec, Canada.,Department of Ophthalmology, Université de Montréal, Montreal, Quebec, Canada
| | - Peter B Dirks
- Department of Surgery, University of Toronto, Toronto, Ontario, Canada.,Department of Molecular Genetics, University of Toronto, Toronto, Ontario, Canada
| | - Keith K Murai
- Centre for Research in Neuroscience, Brain Repair and Integrative Neuroscience Program, The Research Institute of the McGill University Health Centre, Montreal General Hospital, Montreal, Quebec, Canada.,Department of Neurology and Neurosurgery, McGill University, Montreal, Quebec, Canada
| | - Guillaume Bourque
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.,McGill University and Genome Quebec Innovation Centre, Montreal, Quebec, Canada.,Canadian Center for Computational Genomics, Montreal, Quebec, Canada
| | - Jiannis Ragoussis
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada.,McGill University and Genome Quebec Innovation Centre, Montreal, Quebec, Canada
| | - Livia Garzia
- Cancer Research Program, The Research Institute of the McGill University Health Centre, Montreal, Quebec, Canada.,Division of Orthopedic Surgery, Faculty of Surgery, McGill University, Montreal, Quebec, Canada
| | - Michael D Taylor
- Developmental and Stem Cell Biology Program, The Hospital for Sick Children, Toronto, Ontario, Canada. .,The Arthur and Sonia Labatt Brain Tumour Research Centre, The Hospital for Sick Children, Toronto, Ontario, Canada. .,Department of Surgery, University of Toronto, Toronto, Ontario, Canada. .,Division of Neurosurgery, The Hospital for Sick Children, Toronto, Ontario, Canada. .,Department of Laboratory Medicine and Pathobiology, University of Toronto, Toronto, Ontario, Canada. .,Department of Medical Biophysics, University of Toronto, Toronto, Ontario, Canada.
| | - Nada Jabado
- Department of Human Genetics, McGill University, Montreal, Quebec, Canada. .,Department of Pediatrics, McGill University, Montreal, Quebec, Canada. .,The Research Institute of the McGill University Health Center, Montreal, Quebec, Canada.
| | - Claudia L Kleinman
- Lady Davis Institute for Medical Research, Jewish General Hospital, Montreal, Quebec, Canada. .,Department of Human Genetics, McGill University, Montreal, Quebec, Canada.
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Binan L, Roy J, Costantino S. Opto-magnetic Selection and Isolation of Single Cells. Bio Protoc 2019; 9:e3428. [PMID: 33654925 DOI: 10.21769/bioprotoc.3428] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/16/2019] [Revised: 09/16/2019] [Accepted: 10/22/2019] [Indexed: 11/02/2022] Open
Abstract
Capturing single cells from large heterogenous populations based solely on observable traits is necessary for many cell biology applications and remains a major technical challenge. The protocol we present allows the isolation of viable and metabolically active cells selected for their shape, migration speed, contact to other cells, or intracellular protein localization. We previously introduced a method termed Cell Labeling via Photobleaching (CLaP) for the efficient tagging of cells chosen for visual criteria. Here we describe a new protocol for capturing such cells using ferromagnetic beads termed single-cell magneto-optical capture (scMOCa). This technology is especially useful when the number of target cells represents an extremely low fraction of the total population (potentially one single cell), a situation in which conventional sorting techniques like fluorescent or magnetic activated cell sorting (F/MACS) cannot provide satisfactory results in terms of capture efficiency and specificity. scMOCa uses the lasers of a confocal microscope to photobleach and crosslink biotin-4-fluorecein molecules to cell membranes. Streptavidin coated magnetic beads then adhere to biotin moieties and a magnet allows the capture of illuminated cells. By precisely controlling liquid volumes and spacing between the different parts of a simple setup, high cell selectivity and capture efficacy can be achieved. scMOCA allows visual selection and isolation of any number of cells in a microscopy field and captured cells remain viable to generate new colonies of chosen phenotypes for downstream analyses.
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Affiliation(s)
- Loïc Binan
- Research center, Maisonneuve-Rosemont Hospital, Montreal, Canada.,Department of ophthalmology, University of Montreal, Montreal, Canada
| | - Joannie Roy
- Research center, Maisonneuve-Rosemont Hospital, Montreal, Canada
| | - Santiago Costantino
- Research center, Maisonneuve-Rosemont Hospital, Montreal, Canada.,Department of ophthalmology, University of Montreal, Montreal, Canada
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Mohammed SA, Costantino S, Akhmedov A, Ambrosini S, Karsay G, Brown P, Luscher TF, Paneni F. P736Histone marks induced by the methyltransferase SETD7 modulate angiogenic response in diabetes. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz747.0340] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Despite advances in revascularization strategies, type 2 diabetic (T2D) patients with peripheral artery disease (PAD) continue to have a high risk of limb amputation. Hence, strategies that promote vascularization can be considered as a novel therapeutic option in T2D patients with PAD. Epigenetic modifications of histones and DNA have emerged as key modulators of gene expression. Mono-methylation of histone 3 at lysine 4 (H3K4m1) – a specific epigenetic signature induced by the methyltransferase SETD7 – favours a chromatin conformation enabling the transcription of genes involved in inflammation and oxidative stress.
Purpose
To investigate whether SETD7 modulates angiogenesis in experimental diabetes.
Methods
Human aortic endothelial cells (HAECs) were cultured in growth factor-free medium and exposed either to normal glucose (NG, 5 mM) or high glucose (HG, 25 mM) for 48 hours. SETD7 protein and H3K4me1 levels were investigated by Western blot and chromatin immunoprecipitation (ChIP). Knockdown of SETD7 was achieved by small interfering RNA (siRNA). Pharmacological blockade of SETD7 was performed by using the highly selective inhibitor (R)-PFI-2, while its inactive enantiomer, (S)-PFI-2, was used as a control. Scratch and tube formation assays were performed to investigate the impact of SETD7 on angiogenic properties of HAECs. RNA sequencing (RNA-seq) and Ingenuity Pathway Analysis (IPA) were employed to unveil putative genes regulated by SETD7 in HG-treated HAECs. SETD7 expression was also investigated in muscular specimens isolated from type 2 diabetic (db/db) mice and non-diabetic mice undergoing hindlimb ischemia for 21 days.
Results
HG exposure in HAECs led to a time-dependent increase of both SETD7 gene and protein expression, as compared to NG. SETD7 upregulation in HG-treated HAECs was associated with an increase of H3K4me1 levels as well as with impaired endothelial cell migration and tube formation. Of interest, both gene silencing and pharmacological blockade of SETD7 rescued hyperglycemia-induced impairment of angiogenic properties in HAECs. RNA-seq in HG-treated HAECs with and without SETD7 depletion unveiled an array of differentially expressed genes, which were mainly involved in blood vessel growth and angiogenic response, as assessed by IPA analysis. Among dysregulated genes, ChIP assays showed that SETD7-dependent chromatin changes enabled the transcription of Semaphorin 3G (SEMA-3G), a negative regulator of endothelial cell migration. Indeed, gene silencing of SETD7 blunted SEMA-3G expression in HAECs exposed to HG. Consistent with our in vitro observations, SETD7 was upregulated in adductor muscle specimens from db/db mice undergoing hindlimb ischemia as compared to non-diabetic animals.
Conclusions
Pharmacological blockade of SETD7 by (R)-PFI-2 may represent a potential therapeutic approach to boost post-ischemic vascularization in T2D patients with PAD.
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Affiliation(s)
- S A Mohammed
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Costantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - A Akhmedov
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Ambrosini
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - G Karsay
- University Hospital Zurich, Institute for Clinical Chemistry, Zurich, Switzerland
| | - P Brown
- University of Toronto, Structural Genomics Consortium, Toronto, Canada
| | - T F Luscher
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
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Costantino S, Mohammed SA, Akhmedov A, Masi S, Giovannini M, Virdis A, Luscher TF, Paneni F. 2162Neurofibromin 2 (NF2) drives obesity-related endothelial dysfunction by targeting Caveolin-1: a study in mice and humans. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0092] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
Abstract
Abstract
Introduction
Endothelial dysfunction (ED) is a key underpinning of cardiovascular disease in obesity, but the underlying molecular mechanisms remain elusive. Neurofibromin 2 (NF2) is a scaffold-like protein implicated in various cellular processes, namely growth, differentiation and survival. NF2 is inactivated by Akt-dependent phosphorylation at Ser518, whereas its dephosphorylation by the myosin phosphatase target subunit 1 (MYPT-1) leads to an active conformation. The role of NF2 in obesity-related alterations of endothelial phenotype remains elusive.
Purpose
To investigate whether NF2 participates to ED in obesity.
Methods
Human aortic endothelial cells (HAECs) were exposed to palmitic acid (PA, 200 uM) or vehicle for 48 hours. Gene silencing of NF2 was performed by small interfering RNA (siRNA). Protein expression was assessed by Western blot. Nitric oxide (NO) levels were measured by using a colorimetric assay. The interaction of NF2 with endothelial proteins was investigated by co-immunoprecipitation. To specifically determine NF2 role in the endothelium, we generated mice with endothelium-specific deletion of NF2 (NF2 ECKO) by crossing NF2flox/flox mice with tamoxifen-inducible endothelial-specific cre mice [Cdh5(PAC)-CreERT2]. Endothelium-dependent relaxations to acetylcholine (Ach, 10–9 to 10–5 mol/L) were assessed in aortas isolated from male NF2 ECKO and wild type littermates, fed a control (10 kcal% fat) and a high fat diet (60 kcal% fat) for 20 weeks. NF2 signalling and endothelial function were also assessed in small visceral fat arteries (VFA) isolated from 18 obese and 18 age-matched healthy subjects undergoing bariatric surgery and cholecystectomy, respectively.
Results
Exposure of HAECs to PA decreased NF2 phosphorylation at Ser518, thus leading to an active protein conformation. Blunted NF2 phosphorylation was explained by a reduction of Akt phosphorylation at Ser473 and a concomitant increase of MYPT-1 phosphorylation at Thr696. Pull-down experiments revealed that NF2 binds and activates Caveolin 1 (Cav-1), a pivotal repressor of endothelial NO synthase (eNOS). NF2 knockdown in PA-treated HAECs prevented eNOS–Cav-1 interaction, thus preserving eNOS activity and NO levels. In aortas from obese mice, we found that NF2-Cav-1 interaction was responsible for impaired eNOS activity, reduced NO levels and endothelial dysfunction. By contrast, Ach-dependent vasorelaxation were preserved in obese mice with endothelium-specific deletion of NF2. Moreover, we found that NF2 is activated in VFA from obese patients as compared to healthy controls, and its activity negatively correlated with Ach-dependent vasorelaxation of isolated VFA, as assessed by organ chamber experiments.
Conclusions
The present findings – obtained in human endothelial cells, conditional mouse models and visceral fat arteries from obese patients – suggest that targeting NF2 may represent a potential therapeutic strategy to prevent ED in patients with obesity.
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Affiliation(s)
- S Costantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S A Mohammed
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - A Akhmedov
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Masi
- University of Pisa, Clinical and Experimental Medicine, Pisa, Italy
| | - M Giovannini
- University of California Los Angeles, Head and Neck Surgery, Los Angeles, United States of America
| | - A Virdis
- University of Pisa, Clinical and Experimental Medicine, Pisa, Italy
| | - T F Luscher
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
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Ambrosini S, Montecucco F, Akhmedov A, Mohammed SA, Brown P, Rossi F, Luscher TF, Costantino S, Paneni F. P5378The methyltransferase SETD7 promotes myocardial ischemic injury by activating Hippo signalling. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz746.0339] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Abstract
Abstract
Introduction
Despite significant advances in coronary revascularization, acute myocardial infarction remains the leading cause of heart failure and death worldwide. The Hippo pathway is a master regulator of cell survival during myocardial ischemia. Upon cellular stress, activation of Hippo signaling leads to cytosolic retention and degradation of the pro-survival transcription factor YAP. Post-translational modifications, namely methylation, critically affect protein functionality in conditions of cellular stress. The SET domain-containing lysine methyltransferase 7 (SETD7) - which induces a specific mono-methylation of both histone and non-histone proteins - has recently emerged as key player in the pathogenesis of vascular disease. However, the role of SETD7 in the heart is largely unknown.
Purpose
The present study investigates whether SETD7 regulates the Hippo pathway during myocardial ischemia.
Methods
Neonatal rat ventricular myocytes (NRVM) were exposed to normal glucose levels or glucose deprivation (GD) for 15 h, in the presence of the selective SETD7 inhibitor [(R)-PFI-2] or its inactive enantiomer [(S)-PFI-2]. Western blot and real time PCR were employed to investigate the effects of energy stress on SETD7 and the Hippo pathway, while apoptosis was assessed by Caspase-3 activity assay. YAP localization was examined by confocal microscopy while its mono-methylation was assessed by immunoblotting. SETD7 knockout (SETD7−/−) mice and wild-type (WT) littermates (male, 8–12 weeks old) underwent 1 h of left anterior descending (LAD) coronary artery ligation followed by 24 h of reperfusion. Infarct size was assessed by TTC staining and shown as infarct size per ventricle surface (I/V). Cardiac function was investigated at 24h by conventional and Tissue Doppler Imaging echocardiography (Vevo 3100, Visualsonics).
Results
GD for 15h in NRVMs led to both YAP phosphorylation and mono-methylation, and subsequent cytosolic retention, as assessed by confocal microscopy. Reduced nuclear content of YAP was confirmed by downregulation of YAP-dependent pro-survival genes, namely Ctgf and Fgf2. GD-induced YAP inactivation was associated with an increase in SETD7 expression. Interestingly, pharmacological inhibition of SETD7 by (R)-PFI-2 blunted YAP mono-methylation, thus restoring nuclear retention of YAP and transcription of pro-survival genes in GD-treated NRVMs. Moreover, (R)-PFI-2 prevented NRVMs apoptosis. In line with our in vitro findings, SETD7−/− mice showed decreased infarct size as compared to WT littermates (I/V: 16.27%±2 vs. 20.54%±3, p<0.005, respectively). Consistently, cardiac function, as assessed by ejection fraction (EF: 46%±2 vs. 38%±5, p<0.001), fractional shortening (FS: 22%±1 vs. 18%±3, p<0.001) as well as by TDI, was preserved in mice lacking SETD7 as compared to WT animals.
Conclusions
Pharmacological modulation of SETD7 by (R)-PFI-2 may represent a novel therapeutic approach to prevent myocardial ischemic damage.
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Affiliation(s)
- S Ambrosini
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Montecucco
- University of Genoa, Internal Medicine, Genoa, Italy
| | - A Akhmedov
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S A Mohammed
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - P Brown
- University of Toronto, Structural Genomics Consortium, Toronto, Canada
| | - F Rossi
- University of British Columbia, Medical Genetics, Vancouver, Canada
| | - T F Luscher
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Costantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
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40
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Liberale L, Akhmedov A, Bonetti N, Nageswaran V, Costantino S, Pahla J, Matter CM, Montecucco F, Beer JH, Paneni F, Luescher TF, Camici GG. 2287Endothelial SIRT6 exerts a beneficial role in cerebral ischemia/reperfusion injury by preserving blood-brain barrier integrity. Eur Heart J 2019. [DOI: 10.1093/eurheartj/ehz748.0132] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Abstract
Abstract
Introduction
Stroke is a major cause of mortality and morbidity worldwide. Yet, therapeutic strategies are limited to the early reperfusion which can, on the other hand, worsen the brain damage trough ischemia/reperfusion (I/R) injury. Post-stroke blood-brain barrier (BBB) impairment is associated with worsened outcome. Aging is a major risk factor for stroke and genes regulating lifespan also contribute to the determination of cerebral damage during I/R injury.
Purpose
Given the pivotal role of endothelial cells in BBB, we hypothesized that the endothelial-specific expression of the longevity gene SIRT6 may protect the BBB from ischemia/reperfusion damage thus having a beneficial role on stroke outcome.
Methods
Endothelial-specific SIRT6 knockout (eSIRT6−/−) mice and control littermates (CTRL) underwent transient middle cerebral artery occlusion (tMCAO) for 45 min followed by 48 hours of reperfusion. Immunohistochemistry (IHC) was used to investigate BBB permeability by IgG extravasation and molecular mechanisms. Primary human brain microvascular endothelial cells (HBMVECs) transfected with either SIRT6 (siSIRT6) or scrambled (siSCR) small interfering RNA were subjected to hypoxia/reoxygenation (H/R). An in vitro BBB model consisting of a monolayer of siRNA-treated HBMVECs was established and barrier function was assessed by 48 h-lasting transendothelial electrical resistance measurement. SIRT6 expression in monocytes from stroke patients was correlated with the short-term neurological outcome [ΔNIHSS% = (NIHSS discharge-NIHSS admission)/ NIHSS admission*100].
Results
eSIRT6−/− displayed higher infarct volumes and lower survival rate compared to WT mice 48 h after tMCAO. The increased infarct volume was functionally relevant as eSIRT6−/− also showed worse post-stroke neurological impairment. Analysis of brain sections revealed increased BBB damage and increased endothelial expression of cleaved caspase-3 in eSIRT6−/− as compared to control littermates. In vitro, H/R reduced SIRT6 expression in HBMVECs. Mirroring the animal results, SIRT6 silencing impaired the barrier function of HBMVECs 48 h after exposure to H/R. In line with this, SIRT6-silenced HBMVECs showed reduced viability, increased cleaved caspase-3 expression and reduced activation of the anti-apoptotic survival pathway Akt as compared to control cells after H/R. The direct interaction between SIRT6 and Akt was confirmed by co-immunoprecipitation. In ischemic stroke patients, SIRT6 expression was higher in those with short-term neurological improvement (ΔNIHSS% >0) and negatively correlated with ΔNIHSS%.
Conclusion
Endothelial SIRT6 exerts a beneficial role in ischemic stroke by blunting I/R-mediated BBB damage. Specifically, SIRT6 reduces endothelial I/R-induced apoptotic death through activation of the protective Akt pathway. The longevity gene SIRT6 may represent a novel therapeutic target for the treatment of ischemic stroke.
Acknowledgement/Funding
Swiss National Science Foundation
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Affiliation(s)
- L Liberale
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - A Akhmedov
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - N Bonetti
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - V Nageswaran
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Costantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - J Pahla
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - C M Matter
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Montecucco
- University of Genoa, Department of Internal Medicine, Genoa, Italy
| | - J H Beer
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - T F Luescher
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - G G Camici
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
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41
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Abstract
A growing body of evidence suggests that epigenetic modifications-changes to the genome that do not involve changes in DNA sequence-may significantly derail transcriptional programs implicated in angiogenesis, oxidative stress and inflammation, thus fostering cardiovascular damage in patients with diabetes. Notably, adverse epigenetic signals acquired over the life course can be transmitted to the offspring, and may contribute to early cardiovascular phenotypes in the young generations. Hyperglycaemia and insulin resistance-key hallmarks of diabetes-induce an array of epigenetic modifications (i.e., DNA methylation, histone marks, and non-coding RNAs) which are responsible for a long-lasting impairment of vascular and cardiac function, even after intensive glycemic control. Hence, unveiling the "epigenetic landscape" in patients with diabetes may provide a post-genomic snapshot of global cardiovascular risk, and may furnish the tools to design personalized, epigenetic-based therapies to alleviate the burden of cardiovascular disease in diabetic patients. The present review aims to acquaint the scientific community with the rapidly advancing field of epigenetics and its implications in the cardiovascular complications of diabetes.
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Affiliation(s)
- S Costantino
- Division of Cardiovascular Epigenetics, Center for Molecular Cardiology, University of Zürich, Wagistrasse 12, Schlieren, 8952, Zurich, Switzerland
| | - S Ambrosini
- University Heart Center, Cardiology, University Hospital Zurich, Zurich, Switzerland
| | - F Paneni
- Division of Cardiovascular Epigenetics, Center for Molecular Cardiology, University of Zürich, Wagistrasse 12, Schlieren, 8952, Zurich, Switzerland.
- University Heart Center, Cardiology, University Hospital Zurich, Zurich, Switzerland.
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42
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Binan L, Bélanger F, Uriarte M, Lemay JF, Pelletier De Koninck JC, Roy J, Affar EB, Drobetsky E, Wurtele H, Costantino S. Opto-magnetic capture of individual cells based on visual phenotypes. eLife 2019; 8:e45239. [PMID: 30969169 PMCID: PMC6499596 DOI: 10.7554/elife.45239] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2019] [Accepted: 04/09/2019] [Indexed: 12/19/2022] Open
Abstract
The ability to isolate rare live cells within a heterogeneous population based solely on visual criteria remains technically challenging, due largely to limitations imposed by existing sorting technologies. Here, we present a new method that permits labeling cells of interest by attaching streptavidin-coated magnetic beads to their membranes using the lasers of a confocal microscope. A simple magnet allows highly specific isolation of the labeled cells, which then remain viable and proliferate normally. As proof of principle, we tagged, isolated, and expanded individual cells based on three biologically relevant visual characteristics: i) presence of multiple nuclei, ii) accumulation of lipid vesicles, and iii) ability to resolve ionizing radiation-induced DNA damage foci. Our method constitutes a rapid, efficient, and cost-effective approach for isolation and subsequent characterization of rare cells based on observable traits such as movement, shape, or location, which in turn can generate novel mechanistic insights into important biological processes.
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Affiliation(s)
- Loïc Binan
- Research CenterMaisonneuve-Rosemont HospitalMontrealCanada
- Department of OphthalmologyUniversity of MontrealMontrealCanada
| | - François Bélanger
- Research CenterMaisonneuve-Rosemont HospitalMontrealCanada
- Department of Medicine and Molecular Biology ProgramUniversity of MontrealMontrealCanada
| | - Maxime Uriarte
- Research CenterMaisonneuve-Rosemont HospitalMontrealCanada
- Department of Medicine and Molecular Biology ProgramUniversity of MontrealMontrealCanada
| | | | | | - Joannie Roy
- Research CenterMaisonneuve-Rosemont HospitalMontrealCanada
| | - El Bachir Affar
- Research CenterMaisonneuve-Rosemont HospitalMontrealCanada
- Department of Medicine and Molecular Biology ProgramUniversity of MontrealMontrealCanada
| | - Elliot Drobetsky
- Research CenterMaisonneuve-Rosemont HospitalMontrealCanada
- Department of Medicine and Molecular Biology ProgramUniversity of MontrealMontrealCanada
| | - Hugo Wurtele
- Research CenterMaisonneuve-Rosemont HospitalMontrealCanada
| | - Santiago Costantino
- Research CenterMaisonneuve-Rosemont HospitalMontrealCanada
- Department of OphthalmologyUniversity of MontrealMontrealCanada
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43
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Abstract
Multiplexing strategies, which greatly increase the number of simultaneously measured parameters in single experiments, are now being widely implemented by both the pharmaceutical industry and academic researchers. Color has long been used to identify biological signals and, when combined with molecular barcodes, has substantially enhanced the depth of multiplexed sample characterization. Moreover, the recent advent of DNA barcodes has led to an explosion of innovative cell sequencing approaches. Novel barcoding strategies also show great promise for encoding spatial information in transcriptomic studies, and for precise assessment of molecular abundance. Both color- and DNA-based barcodes can be conveniently analyzed with either a microscope or a cytometer, or via DNA sequencing. Here we review the basic principles of several technologies used to create barcodes and detail the type of samples that can be identified with such tags.
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Affiliation(s)
- Loïc Binan
- 1 Research Center of the Maisonneuve-Rosemont Hospital, Montreal, QC, Canada.,2 Department of Ophthalmology, Université de Montréal, Montreal, QC, Canada
| | - Elliot A Drobetsky
- 1 Research Center of the Maisonneuve-Rosemont Hospital, Montreal, QC, Canada.,3 Department of Medicine & Molecular Biology Program, University of Montreal, Montreal, QC, Canada
| | - Santiago Costantino
- 1 Research Center of the Maisonneuve-Rosemont Hospital, Montreal, QC, Canada.,2 Department of Ophthalmology, Université de Montréal, Montreal, QC, Canada
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44
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Ghesquière P, Elsherbiny A, Fortier E, McQuaid M, Mazzaferri J, Bélanger F, Cheriet F, Drobetsky E, Wurtele H, Costantino S. An open-source algorithm for rapid unbiased determination of DNA fiber length. DNA Repair (Amst) 2019; 74:26-37. [PMID: 30665830 DOI: 10.1016/j.dnarep.2019.01.003] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/21/2018] [Revised: 12/21/2018] [Accepted: 01/07/2019] [Indexed: 01/26/2023]
Abstract
DNA fiber fluorography is widely employed to study the kinetics of DNA replication, but the usefulness of this approach has been limited by the lack of freely-available automated analysis tools. Quantification of DNA fibers usually relies on manual examination of immunofluorescence microscopy images, which is laborious and prone to inter- and intra-operator variability. To address this, we developed an unbiased, fully automated algorithm that quantifies length and color of DNA fibers from fluorescence microscopy images. Our fiber quantification method, termed FiberQ, is an open-source image processing tool based on edge detection and a novel segment splicing approach. Here, we describe the algorithm in detail, validate our results experimentally, and benchmark the analysis against manual assessments. Our implementation is offered free of charge to the scientific community under the General Public License.
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Affiliation(s)
- Pierre Ghesquière
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
| | - Abdelhamid Elsherbiny
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada; Programmes de Biologie Moléculaire, Université de Montréal, Montréal, Québec, Canada
| | - Emile Fortier
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada; Programmes de Biologie Moléculaire, Université de Montréal, Montréal, Québec, Canada
| | - Mary McQuaid
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada; Programmes de Biologie Moléculaire, Université de Montréal, Montréal, Québec, Canada
| | - Javier Mazzaferri
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
| | - François Bélanger
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada
| | - Farida Cheriet
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada; Département de Génie Informatique et Génie Logiciel, Polytechnique Montréal, Québec, Canada
| | - Elliot Drobetsky
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada; Programmes de Biologie Moléculaire, Université de Montréal, Montréal, Québec, Canada; Département de Médecine, Université de Montréal, Montréal, Québec, Canada
| | - Hugo Wurtele
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada; Programmes de Biologie Moléculaire, Université de Montréal, Montréal, Québec, Canada; Département de Médecine, Université de Montréal, Montréal, Québec, Canada
| | - Santiago Costantino
- Centre de Recherche de l'Hôpital Maisonneuve-Rosemont, Montréal, Québec, Canada; Département d'Ophtalmologie, Université de Montréal, Montréal, Québec, Canada.
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45
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Wilson AM, Mazzaferri J, Bergeron É, Patskovsky S, Marcoux-Valiquette P, Costantino S, Sapieha P, Meunier M. In Vivo Laser-Mediated Retinal Ganglion Cell Optoporation Using K V1.1 Conjugated Gold Nanoparticles. Nano Lett 2018; 18:6981-6988. [PMID: 30285455 DOI: 10.1021/acs.nanolett.8b02896] [Citation(s) in RCA: 31] [Impact Index Per Article: 5.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/18/2023]
Abstract
Vision loss caused by retinal diseases affects hundreds of millions of individuals worldwide. The retina is a delicate central nervous system tissue stratified into layers of cells with distinct roles. Currently, there is a void in treatments that selectively target diseased retinal cells, and current therapeutic paradigms present complications associated with off-target effects. Herein, as a proof of concept, we introduce an in vivo method using a femtosecond laser to locally optoporate retinal ganglion cells (RGCs) targeted with functionalized gold nanoparticles (AuNPs). We provide evidence that AuNPs functionalized with an antibody toward the cell-surface voltage-gated K+ channel subunit KV1.1 can selectively deliver fluorescently tagged siRNAs or fluorescein isothiocyanate-dextran dye into retinal cells when irradiated with an 800 nm 100 fs laser. Importantly, neither AuNP administration nor irradiation resulted in RGC death. This system provides a novel, non-viral-based approach that has the potential to selectively target retinal cells in diseased regions while sparing healthy areas and may be harnessed in future cell-specific therapies for retinal degenerative diseases.
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Affiliation(s)
- Ariel M Wilson
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
| | | | - Éric Bergeron
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
| | - Sergiy Patskovsky
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
| | - Paule Marcoux-Valiquette
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
| | | | | | - Michel Meunier
- Department of Engineering Physics , Polytechnique Montréal , Montreal , Quebec , Canada , H3C 3A7
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46
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Costantino S, Akhmedov A, Melina G, Mohammed SA, Wijnen W, Othman A, Hornemann T, Volpe M, Sinatra R, Camici GG, Luscher TF, Paneni F. 1431Modulation of JunD by miR-494-3p causes intra-myocardial lipid accumulation and obesity cardiomyopathy: a study in mice and humans. Eur Heart J 2018. [DOI: 10.1093/eurheartj/ehy565.1431] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- S Costantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - A Akhmedov
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - G Melina
- Sapienza University of Rome, Department of Cardiac Surgery, Sant'Andrea Hospital, Rome, Italy
| | - S A Mohammed
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - W Wijnen
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - A Othman
- University Hospital Zurich, Institute for Clinical Chemistry, Zurich, Switzerland
| | - T Hornemann
- University Hospital Zurich, Institute for Clinical Chemistry, Zurich, Switzerland
| | - M Volpe
- Sapienza University of Rome, Department of Clinical and Molecular Medicine, Rome, Italy
| | - R Sinatra
- Sapienza University of Rome, Department of Cardiac Surgery, Sant'Andrea Hospital, Rome, Italy
| | - G G Camici
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - T F Luscher
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
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47
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Akhmedov A, Montecucco F, Camici GG, Vdovenko D, Costantino S, Bonetti N, Diaz Canestro C, Paneni F, Mach F, Luescher TF. P290GDF11 promotes increased sensitivity of the murine heart to ischemic injury. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.207] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/14/2022] Open
Affiliation(s)
- A Akhmedov
- University Hospital Zurich, Zurich, Switzerland
| | - F Montecucco
- University of Genoa, Department of Internal Medicine, Genoa, Italy
| | - G G Camici
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - D Vdovenko
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Costantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - N Bonetti
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - C Diaz Canestro
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Mach
- University of Geneva, Faculty of Medicine, Division of Cardiology, Geneva, Switzerland
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48
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Akhmedov A, Montecucco F, Schaub Clerigue A, Costantino S, Paneni F, Camici GG, Mach F, Luescher TF. 58Cardiac-specific overexpression of the transcription factor JunD promotes increased sensitivity to myocardial infarction. Cardiovasc Res 2018. [DOI: 10.1093/cvr/cvy060.024] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/13/2022] Open
Affiliation(s)
- A Akhmedov
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Montecucco
- University of Genoa, Department of Internal Medicine, Genoa, Italy
| | - A Schaub Clerigue
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - S Costantino
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Paneni
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - G G Camici
- University of Zurich, Center for Molecular Cardiology, Schlieren, Switzerland
| | - F Mach
- University of Geneva, Faculty of Medicine, Division of Cardiology, Geneva, Switzerland
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49
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Mazzaferri J, Larrivée B, Cakir B, Sapieha P, Costantino S. A machine learning approach for automated assessment of retinal vasculature in the oxygen induced retinopathy model. Sci Rep 2018; 8:3916. [PMID: 29500375 PMCID: PMC5834630 DOI: 10.1038/s41598-018-22251-7] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2017] [Accepted: 02/20/2018] [Indexed: 12/21/2022] Open
Abstract
Preclinical studies of vascular retinal diseases rely on the assessment of developmental dystrophies in the oxygen induced retinopathy rodent model. The quantification of vessel tufts and avascular regions is typically computed manually from flat mounted retinas imaged using fluorescent probes that highlight the vascular network. Such manual measurements are time-consuming and hampered by user variability and bias, thus a rapid and objective method is needed. Here, we introduce a machine learning approach to segment and characterize vascular tufts, delineate the whole vasculature network, and identify and analyze avascular regions. Our quantitative retinal vascular assessment (QuRVA) technique uses a simple machine learning method and morphological analysis to provide reliable computations of vascular density and pathological vascular tuft regions, devoid of user intervention within seconds. We demonstrate the high degree of error and variability of manual segmentations, and designed, coded, and implemented a set of algorithms to perform this task in a fully automated manner. We benchmark and validate the results of our analysis pipeline using the consensus of several manually curated segmentations using commonly used computer tools. The source code of our implementation is released under version 3 of the GNU General Public License (https://www.mathworks.com/matlabcentral/fileexchange/65699-javimazzaf-qurva).
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Affiliation(s)
- Javier Mazzaferri
- Research Center of the Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada
| | - Bruno Larrivée
- Research Center of the Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada.,Department of Ophthalmology, University of Montreal, Montreal, Quebec, Canada
| | - Bertan Cakir
- Eye Center, Medical Center, Faculty of Medicine, University of Freiburg, Freiburg im Breisgau, Germany
| | - Przemyslaw Sapieha
- Research Center of the Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada.,Department of Ophthalmology, University of Montreal, Montreal, Quebec, Canada.,Department of Biochemistry, University of Montreal, Montreal, Quebec, Canada
| | - Santiago Costantino
- Research Center of the Maisonneuve-Rosemont Hospital, Montreal, Quebec, Canada. .,Department of Ophthalmology, University of Montreal, Montreal, Quebec, Canada.
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50
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Hidalgo-Aguirre M, Costantino S, Lesk MR. Pilot study of the pulsatile neuro-peripapillary retinal deformation in glaucoma and its relationship with glaucoma risk factors. Curr Eye Res 2017; 42:1620-1627. [PMID: 28937876 DOI: 10.1080/02713683.2017.1362004] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
Abstract
PURPOSE To perform a pilot study of the neuro-peripapillary retinal tissue deformation during the cardiac cycle among healthy eyes, ocular hypertensive (OHT), open angle glaucoma suspect (OAG-S), and early open angle glaucoma (EOAG) patients using video rate optical coherence tomography (OCT) image series. METHODS OCT line scan sequences of the same region of the optic nerve head (ONH) were obtained from 15 EOAG, 6 OHT, 10 OAG-S, and 10 healthy age-matched eyes. One eye per patient was studied. Changes in the axial distance between the inferotemporal peripapillary retina and the prelaminar tissue, in time, were determined using an automated custom made algorithm. Linear correlations between this neuro-peripapillary retinal (N-PP) deformation and variables measured during the full ophthalmic examination are analyzed. RESULTS Healthy eyes showed larger N-PP deformation (4.8 ± 1 µm) than the OHT (3.5 ± 0.3 µm, p = 0.015), OAG-S (3.8 ± 0.8 µm, p = 0.045), and EOAG (3.2 ± 0.7 µm, p < 0.001) groups. Eyes with lower ocular pulse amplitude, thinner RNFL's, or worse visual fields showed smaller N-PP deformation, depending on the diagnosis. A linear model to explain deformation within the EOAG group with intraocular pressure and systolic perfusion pressure as predictors was found to be significant (R2 = 0.767, p < 0.001). CONCLUSIONS Smaller mean N-PP deformation was observed in the EOAG, OAG-S, and OHT groups compared to healthy eyes in this pilot study. The measured deformation correlated with risk factors for the glaucomatous optic neuropathy, but these correlations varied depending on the diagnosis. The role of pulsatile neuro-peripapillary retinal deformation in the pathophysiology of OAG remains to be determined.
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Affiliation(s)
- Maribel Hidalgo-Aguirre
- a Institut National de la Recherche Scientifique centre Energie , Materiaux et Telecommunications , 1650 Boulevard Lionel-Boulet, Varennes , Quebec , J3X 1S2 , Canada.,b Maisonneuve-Rosemont Hospital , Research Center , 5415 L'Assomption, Montreal , Quebec , H1T 2M4 , Canada
| | - Santiago Costantino
- b Maisonneuve-Rosemont Hospital , Research Center , 5415 L'Assomption, Montreal , Quebec , H1T 2M4 , Canada.,c Universite de Montreal , Ophthalmology Department, Faculty of Medicine , 2900 Boulevard Edouard-Montpetit, Montreal , Quebec , H3T 1J4 , Canada
| | - Mark Richard Lesk
- b Maisonneuve-Rosemont Hospital , Research Center , 5415 L'Assomption, Montreal , Quebec , H1T 2M4 , Canada.,c Universite de Montreal , Ophthalmology Department, Faculty of Medicine , 2900 Boulevard Edouard-Montpetit, Montreal , Quebec , H3T 1J4 , Canada
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