1
|
Grazia Mele V, Chioccarelli T, Diano N, Cappetta D, Ferraro B, Telesca M, Moggio M, Porreca V, De Angelis A, Berrino L, Fasano S, Cobellis G, Chianese R, Manfrevola F. Variation of sperm quality and circular RNA content in men exposed to environmental contamination with heavy metals in 'Land of Fires', Italy. Hum Reprod 2024:deae109. [PMID: 38885964 DOI: 10.1093/humrep/deae109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2023] [Revised: 03/13/2024] [Indexed: 06/20/2024] Open
Abstract
STUDY QUESTION Can illegal discharge of toxic waste into the environment induce a new condition of morpho-epigenetic pathozoospermia in normozoospermic young men? SUMMARY ANSWER Toxic environmental contaminants promote the onset of a new pathozoospermic condition in young normozoospermic men, consisting of morpho-functional defects and a sperm increase of low-quality circular RNA (circRNA) cargo, tightly linked to contaminant bioaccumulation in seminal plasma. WHAT IS KNOWN ALREADY Epidemiological findings have reported several reproductive anomalies depending on exposure to contaminants discharged into the environment, such as germ cell apoptosis, steroidogenesis defects, oxidative stress induction, blood-testis barrier dysfunctions, and poor sperm quality onset. In this scenario, a vast geographical area located in Campania, Italy, called the 'Land of Fires', has been associated with an excessive illegal discharge of toxic waste into the environment, negatively impacting human health, including male reproductive functions. STUDY DESIGN, SIZE, DURATION Semen samples were obtained from healthy normozoospermic men divided into two experimental groups, consisting of men living in the 'Land of Fires' (LF; n = 80) or not (CTRL; n = 80), with age ranging from 25 to 40 years. The study was carried out following World Health Organization guidelines. PARTICIPANTS/MATERIALS, SETTING, METHODS Quality parameters of semen from CTRL- and LF-normozoospermic men were evaluated by computer-assisted semen analysis; high-quality spermatozoa from CTRL and LF groups (n = 80 for each experimental group) were obtained using a 80-40% discontinuous centrifugation gradient. Seminal plasma was collected following centrifugation and used for the dosage of chemical elements, dioxins and steroid hormones by liquid chromatography with tandem mass spectrometry. Sperm morpho-functional investigations (cellular morphology, acrosome maturation, IZUMO1 fertility marker analysis, plasma membrane lipid state, oxidative stress) were assessed on the purified high-quality spermatozoa fraction by immunochemistry/immunofluorescence and western blot analyses. Sperm circRNA cargo was evaluated by quantitative RT-PCR, and the physical interaction among circRNAs and fused in sarcoma (FUS) protein was detected using an RNA-binding protein immunoprecipitation assay. Protein immunoprecipitation experiments were carried out to demonstrate FUS/p-300 protein interaction in sperm cells. Lastly, in vitro lead (Pb) treatment of high-quality spermatozoa collected from normozoospermic controls was used to investigate a correlation between Pb accumulation and onset of the morpho-epigenetic pathozoospermic phenotype. MAIN RESULTS AND THE ROLE OF CHANCE Several morphological defects were identified in LF-spermatozoa, including: a significant increase (P < 0.05 versus CTRL) in the percentage of spermatozoa characterized by structural defects in sperm head and tail; and a high percentage (P < 0.01) of peanut agglutinin and IZUMO1 null signal cells. In agreement with these data, abnormal steroid hormone levels in LF seminal plasma suggest a premature acrosome reaction onset in LF-spermatozoa. The abnormal immunofluorescence signals of plasma membrane cholesterol complexes/lipid rafts organization (Filipin III and Flotillin-1) and of oxidative stress markers [3-nitrotyrosine and 3-nitrotyrosine and 4-hydroxy-2-nonenal] observed in LF-spermatozoa and associated with a sperm motility reduction (P < 0.01), demonstrated an affected membrane fluidity, potentially impacting sperm motility. Bioaccumulation of heavy metals and dioxins occurring in LF seminal plasma and a direct correlation between Pb and deregulated circRNAs related to high- and low-sperm quality was also revealed. In molecular terms, we demonstrated that Pb bioaccumulation promoted FUS hyperacetylation via physical interaction with p-300 and, in turn, its shuttling from sperm head to tail, significantly enhancing (P < 0.01 versus CTRL) the endogenous backsplicing of sperm low-quality circRNAs in LF-spermatozoa. LIMITATIONS, REASONS FOR CAUTION Participants were interviewed to better understand their area of origin, their eating habits as well as their lifestyles, however any information incorrectly communicated or voluntarily omitted that could potentially compromise experimental group determination cannot be excluded. A possible association between seminal Pb content and other heavy metals in modulating sperm quality should be explored further. Future investigations will be performed in order to identify potential synergistic or anti-synergistic effects of heavy metals on male reproduction. WIDER IMPLICATIONS OF THE FINDINGS Our study provides new findings regarding the effects of environmental contaminants on male reproduction, highlighting how a sperm phenotype classified as normozoospermic may potentially not match with a healthy morpho-functional and epigenetic one. Overall, our results improve the knowledge to allow a proper assessment of sperm quality through circRNAs as biomarkers to select spermatozoa with high morpho-epigenetic quality to use for ART. STUDY FUNDING/COMPETING INTEREST(S) This study was supported by 'Convenzione Azienda Sanitaria Locale (ASL) Caserta, Regione Campania' (ASL CE Prot. N. 1217885/DIR. GE). The authors have no conflict of interest to declare. TRIAL REGISTRATION NUMBER N/A.
Collapse
Affiliation(s)
- Vincenza Grazia Mele
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Teresa Chioccarelli
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Nadia Diano
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Donato Cappetta
- Department of Experimental Medicine, University of Salento, Lecce, Italy
| | - Bruno Ferraro
- UOSD of Reproductive Pathophysiology, Marcianise Hospital, Caserta, Italy
| | - Marialucia Telesca
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Martina Moggio
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Veronica Porreca
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Antonella De Angelis
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Liberato Berrino
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Silvia Fasano
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Gilda Cobellis
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Rosanna Chianese
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| | - Francesco Manfrevola
- Department of Experimental Medicine, University of Campania L. Vanvitelli, Naples, Italy
| |
Collapse
|
2
|
Lin T, Guo X, Du Q, Liu W, Zhong X, Wang S, Cao L. MicroRNA let-7c-5p Alleviates in Hepatocellular Carcinoma by Targeting Enhancer of Zeste Homolog 2: A Study Intersecting Bioinformatic Analysis and Validated Experiments. Crit Rev Immunol 2024; 44:23-39. [PMID: 38505919 DOI: 10.1615/critrevimmunol.2024051519] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 03/21/2024]
Abstract
Enhancer of zeste homolog 2 (EZH2)gene has a prognostic role in hepatocellular carcinoma (HCC). This study aimed to identify the role of microRNAs (miRNAs) let-7c-5p by targeting EZH2 in HCC. We downloaded gene and miRNA RNA-seq data from The Cancer Genome Atlas (TCGA) database. Differences in EZH2 expression between different groups were analyzed and the association of EZH2 expression with HCC prognosis was detected using Cox regression analysis. The miRNA-EZH2-pathway network was constructed. Dual-luciferase reporter assay was performed to detect the hsa-let-7c-5p-EZH2. Cell proliferation, migration, invasion, and apoptosis were detected by CCK-8, Wound healing, Transwell, and Flow cytometry, respectively. RT-qPCR and Western blot were used to detect the expression of let-7c-5p and EZH2. EZH2 was upregulated in HCC tumors (P < 0.0001). Cox regression analysis showed that TCGA HCC patients with high EZH2 expression levels showed a short survival time [hazard ratio (HR) = 1.677, 95% confidence interval (CI) 1.316-2.137; P < 0.0001]. Seven miRNAs were negatively correlated with EZH2 expression and were significantly downregulated in HCC tumor samples (P < 0.0001), in which hsa-let-7c-5p was associated with prognosis in HCC (HR = 0.849 95% CI 0.739-0.975; P = 0.021). We identified 14 immune cells that showed significant differences in EZH2 high- and low-expression groups. Additionally, let-7c-5p inhibited HCC cell proliferation, migration, and invasion and reversed the promoted effects of EZH2 on HCC cell malignant characteristics. hsa-let-7c-5p-EZH2 significantly suppressed HCC malignant characteristics, which can be used for HCC prognosis.
Collapse
Affiliation(s)
- Tianyu Lin
- Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University
| | - Xinli Guo
- Department of Operating Room, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310000, China
| | - Qian Du
- Department of General Surgery, The 903rd Hospital of PLA, Hangzhou 310000, China
| | - Wei Liu
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310000, China
| | - Xin Zhong
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310000, China
| | - Suihan Wang
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310000, China
| | - Liping Cao
- Department of General Surgery, Sir Run Run Shaw Hospital, School of Medicine, Zhejiang University, Hangzhou 310000, China
| |
Collapse
|
3
|
Tabasso C, Frossard MP, Ducret C, Chehade H, Mauduit C, Benahmed M, Simeoni U, Siddeek B. Transient Post-Natal Exposure to Xenoestrogens Induces Long-Term Alterations in Cardiac Calcium Signaling. TOXICS 2022; 10:toxics10030102. [PMID: 35324727 PMCID: PMC8954167 DOI: 10.3390/toxics10030102] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 01/24/2022] [Revised: 02/03/2022] [Accepted: 02/16/2022] [Indexed: 02/05/2023]
Abstract
Today, non-communicable disorders are widespread worldwide. Among them, cardiovascular diseases represent the main cause of death. At the origin of these diseases, exposure to challenges during developmental windows of vulnerability (peri-conception, in utero, and early infancy periods) have been incriminated. Among the challenges that have been described, endocrine disruptors are of high concern because of their omnipresence in the environment. Worrisomely, since birth, children are exposed to a significant number of endocrine disruptors. However, the role of such early exposure on long-term cardiac health is poorly described. In this context, based on a model of rats exposed postnatally and transiently to an estrogenic compound prototype (estradiol benzoate, EB), we aimed to delineate the effects on the adult heart of such transient early exposure to endocrine disruptors and identify the underlying mechanisms involved in the potential pathogenesis. We found that this transient post-natal exposure to EB induced cardiac hypertrophy in adulthood, with increased cardiomyocyte size. The evaluation of cardiac calcium signaling, through immunoblot approaches, highlighted decreased expression of the sarcoplasmic reticulum calcium ATPase 2 (SERCA2) and decreased Nuclear Factor of Activated T Cells (NFAT3) phosphorylation as a potential underlying mechanism of cardiac hypertrophy. Furthermore, the treatment of cardiomyocytes with EB in vitro induced a decrease in SERCA2 protein levels. Overall, our study demonstrates that early transient exposure to EB induces permanent cardiac alterations. Together, our data highlight SERCA2 down-regulation as a potential mechanism involved in the cardiac pathogenesis induced by EB. These results suggest programming of adult heart dysfunctions such as arrhythmia and heart failures by early exposure to endocrine disruptors and could open new perspectives for treatment and prevention.
Collapse
Affiliation(s)
- Cassandra Tabasso
- Woman-Mother-Child Department, Division of Pediatrics, Developmental Origins of Health and Disease (DOHaD) Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, 1011 Lausanne, Switzerland; (C.T.); (M.-P.F.); (C.D.); (H.C.); (U.S.)
| | - Marie-Pauline Frossard
- Woman-Mother-Child Department, Division of Pediatrics, Developmental Origins of Health and Disease (DOHaD) Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, 1011 Lausanne, Switzerland; (C.T.); (M.-P.F.); (C.D.); (H.C.); (U.S.)
| | - Camille Ducret
- Woman-Mother-Child Department, Division of Pediatrics, Developmental Origins of Health and Disease (DOHaD) Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, 1011 Lausanne, Switzerland; (C.T.); (M.-P.F.); (C.D.); (H.C.); (U.S.)
| | - Hassib Chehade
- Woman-Mother-Child Department, Division of Pediatrics, Developmental Origins of Health and Disease (DOHaD) Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, 1011 Lausanne, Switzerland; (C.T.); (M.-P.F.); (C.D.); (H.C.); (U.S.)
| | - Claire Mauduit
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 10, 06204 Nice, France; (C.M.); (M.B.)
| | - Mohamed Benahmed
- Institut National de la Santé et de la Recherche Médicale (INSERM) U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 10, 06204 Nice, France; (C.M.); (M.B.)
| | - Umberto Simeoni
- Woman-Mother-Child Department, Division of Pediatrics, Developmental Origins of Health and Disease (DOHaD) Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, 1011 Lausanne, Switzerland; (C.T.); (M.-P.F.); (C.D.); (H.C.); (U.S.)
| | - Benazir Siddeek
- Woman-Mother-Child Department, Division of Pediatrics, Developmental Origins of Health and Disease (DOHaD) Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, 1011 Lausanne, Switzerland; (C.T.); (M.-P.F.); (C.D.); (H.C.); (U.S.)
- Correspondence: ; Tel.: +41-21-3143-212
| |
Collapse
|
4
|
Environmental Impact on Male (In)Fertility via Epigenetic Route. J Clin Med 2020; 9:jcm9082520. [PMID: 32764255 PMCID: PMC7463911 DOI: 10.3390/jcm9082520] [Citation(s) in RCA: 22] [Impact Index Per Article: 5.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/22/2020] [Revised: 07/21/2020] [Accepted: 07/31/2020] [Indexed: 12/14/2022] Open
Abstract
In the last 40 years, male reproductive health-which is very sensitive to both environmental exposure and metabolic status-has deteriorated and the poor sperm quality observed has been suggested to affect offspring development and its health in adult life. In this scenario, evidence now suggests that epigenetics shapes endocrine functions, linking genetics and environment. During fertilization, spermatozoa share with the oocyte their epigenome, along with their haploid genome, in order to orchestrate embryo development. The epigenetic signature of spermatozoa is the result of a dynamic modulation of the epigenetic marks occurring, firstly, in the testis-during germ cell progression-then, along the epididymis, where spermatozoa still receive molecules, conveyed by epididymosomes. Paternal lifestyle, including nutrition and exposure to hazardous substances, alters the phenotype of the next generations, through the remodeling of a sperm epigenetic blueprint that dynamically reacts to a wide range of environmental and lifestyle stressors. With that in mind, this review will summarize and discuss insights into germline epigenetic plasticity caused by environmental stimuli and diet and how spermatozoa may be carriers of induced epimutations across generations through a mechanism known as paternal transgenerational epigenetic inheritance.
Collapse
|
5
|
Blin G, Liand M, Mauduit C, Chehade H, Benahmed M, Simeoni U, Siddeek B. Maternal Exposure to High-Fat Diet Induces Long-Term Derepressive Chromatin Marks in the Heart. Nutrients 2020; 12:E181. [PMID: 31936461 PMCID: PMC7019950 DOI: 10.3390/nu12010181] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2019] [Revised: 12/30/2019] [Accepted: 01/07/2020] [Indexed: 02/07/2023] Open
Abstract
Heart diseases are a leading cause of death. While the link between early exposure to nutritional excess and heart disease risk is clear, the molecular mechanisms involved are poorly understood. In the developmental programming field, increasing evidence is pointing out the critical role of epigenetic mechanisms. Among them, polycomb repressive complex 2 (PRC2) and DNA methylation play a critical role in heart development and pathogenesis. In this context, we aimed at evaluating the role of these epigenetic marks in the long-term cardiac alterations induced by early dietary challenge. Using a model of rats exposed to maternal high-fat diet during gestation and lactation, we evaluated cardiac alterations at adulthood. Expression levels of PRC2 components, its histone marks di- and trimethylated histone H3 (H3K27me2/3), associated histone mark (ubiquitinated histone H2A, H2AK119ub1) and target genes were measured by Western blot. Global DNA methylation level and DNA methyl transferase 3B (DNMT3B) protein levels were measured. Maternal high-fat diet decreased H3K27me3, H2Ak119ub1 and DNA methylation levels, down-regulated the enhancer of zeste homolog 2 (EZH2), and DNMT3B expression. The levels of the target genes, isl lim homeobox 1 (Isl1), six homeobox 1 (Six1) and mads box transcription enhancer factor 2, polypeptide C (Mef2c), involved in cardiac pathogenesis were up regulated. Overall, our data suggest that the programming of cardiac alterations by maternal exposure to high-fat diet involves the derepression of pro-fibrotic and pro-hypertrophic genes through the induction of EZH2 and DNMT3B deficiency.
Collapse
Affiliation(s)
- Guillaume Blin
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| | - Marjorie Liand
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| | - Claire Mauduit
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, 06204 Nice, France; (C.M.); (M.B.)
| | - Hassib Chehade
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| | - Mohamed Benahmed
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, 06204 Nice, France; (C.M.); (M.B.)
| | - Umberto Simeoni
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| | - Benazir Siddeek
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Rue du Bugnon 27, 1011 Lausanne, Switzerland; (G.B.); (M.L.); (H.C.); (U.S.)
| |
Collapse
|
6
|
Bottini S, Pratella D, Grandjean V, Repetto E, Trabucchi M. Recent computational developments on CLIP-seq data analysis and microRNA targeting implications. Brief Bioinform 2019; 19:1290-1301. [PMID: 28605404 PMCID: PMC6291801 DOI: 10.1093/bib/bbx063] [Citation(s) in RCA: 22] [Impact Index Per Article: 4.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2017] [Indexed: 01/18/2023] Open
Abstract
Cross-Linking
Immunoprecipitation associated to
high-throughput sequencing (CLIP-seq) is a technique used to
identify RNA directly bound to RNA-binding proteins across the entire transcriptome in
cell or tissue samples. Recent technological and computational advances permit the
analysis of many CLIP-seq samples simultaneously, allowing us to reveal the comprehensive
network of RNA–protein interaction and to integrate it to other genome-wide analyses.
Therefore, the design and quality management of the CLIP-seq analyses are of critical
importance to extract clean and biological meaningful information from CLIP-seq
experiments. The application of CLIP-seq technique to Argonaute 2 (Ago2) protein, the main
component of the microRNA (miRNA)-induced silencing complex, reveals the direct binding
sites of miRNAs, thus providing insightful information about the role played by miRNA(s).
In this review, we summarize and discuss the most recent computational methods for
CLIP-seq analysis, and discuss their impact on Ago2/miRNA-binding site identification and
prediction with a regard toward human pathologies.
Collapse
Affiliation(s)
- Silvia Bottini
- Université Côte d'Azur, Inserm, C3M, 151 route de St-Antoine-de-Ginestière, B.P. 2 3194, 06204 Nice, France
| | - David Pratella
- Université Côte d'Azur, Inserm, C3M, 151 route de St-Antoine-de-Ginestière, B.P. 2 3194, 06204 Nice, France
| | - Valerie Grandjean
- Université Côte d'Azur, Inserm, C3M, 151 route de St-Antoine-de-Ginestière, B.P. 2 3194, 06204 Nice, France
| | - Emanuela Repetto
- Université Côte d'Azur, Inserm, C3M, 151 route de St-Antoine-de-Ginestière, B.P. 2 3194, 06204 Nice, France
| | - Michele Trabucchi
- Université Côte d'Azur, Inserm, C3M, 151 route de St-Antoine-de-Ginestière, B.P. 2 3194, 06204 Nice, France
| |
Collapse
|
7
|
Long-term impact of maternal high-fat diet on offspring cardiac health: role of micro-RNA biogenesis. Cell Death Discov 2019; 5:71. [PMID: 30854230 PMCID: PMC6397280 DOI: 10.1038/s41420-019-0153-y] [Citation(s) in RCA: 15] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2019] [Revised: 02/08/2019] [Accepted: 02/13/2019] [Indexed: 12/25/2022] Open
Abstract
Heart failure is a worldwide leading cause of death. Diet and obesity are particularly of high concern in heart disease etiology. Gravely, altered nutrition during developmental windows of vulnerability can have long-term impact on heart health; however, the underlying mechanisms are poorly understood. In the understanding of the initiation of chronic diseases related to developmental exposure to environmental challenges, deregulations in epigenetic mechanisms including micro-RNAs have been proposed as key events. In this context, we aimed at delineating the role of micro-RNAs in the programming of cardiac alterations induced by early developmental exposure to nutritional imbalance. To reach our aim, we developed a human relevant model of developmental exposure to nutritional imbalance by maternally exposing rat to high-fat diet during gestation and lactation. In this model, offspring exposed to maternal high-fat diet developed cardiac hypertrophy and increased extracellular matrix depot compared to those exposed to chow diet. Microarray approach performed on cardiac tissue allowed the identification of a micro-RNA subset which was down-regulated in high-fat diet-exposed animals and which were predicted to regulate transforming growth factor-beta (TGFβ)-mediated remodeling. As indicated by in vitro approaches and gene expression measurement in the heart of our animals, decrease in DiGeorge critical region 8 (DGCR8) expression, involved in micro-RNA biogenesis, seems to be a critical point in the alterations of the micro-RNA profile and the TGFβ-mediated remodeling induced by maternal exposure to high-fat diet. Finally, increasing DGCR8 activity and/or expression through hemin treatment in vitro revealed its potential in the rescue of the pro-fibrotic phenotype in cardiomyocytes driven by DGCR8 decrease. These findings suggest that cardiac alterations induced by maternal exposure to high-fat diet is related to abnormalities in TGFβ pathway and associated with down-regulated micro-RNA processing. Our study highlighted DGCR8 as a potential therapeutic target for heart diseases related to early exposure to dietary challenge.
Collapse
|
8
|
Sperm epigenome as a marker of environmental exposure and lifestyle, at the origin of diseases inheritance. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2018; 778:38-44. [DOI: 10.1016/j.mrrev.2018.09.001] [Citation(s) in RCA: 38] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 08/28/2018] [Revised: 09/04/2018] [Accepted: 09/05/2018] [Indexed: 12/19/2022]
|
9
|
Siddeek B, Li N, Mauduit C, Chehade H, Rigal E, Tolsa JF, Armengaud JB, Yzydorczyk C, Benahmed M, Vergely C, Simeoni U. Transient postnatal over nutrition induces long-term alterations in cardiac NLRP3-inflammasome pathway. Nutr Metab Cardiovasc Dis 2018; 28:944-951. [PMID: 29752038 DOI: 10.1016/j.numecd.2018.03.013] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 02/02/2018] [Revised: 03/22/2018] [Accepted: 03/31/2018] [Indexed: 01/18/2023]
Abstract
BACKGROUND AND AIMS The prevalence of obesity is increasing worldwide at an alarming rate. Altered early nutrition, in particular postnatal overfeeding (PNOF), is a risk factor for impaired cardiac function in adulthood. In the understanding of the initiation or progression of heart diseases, NLRP3 inflammasome and non-coding RNAs have been proposed as key players. In this context, the aim of this study was to decipher the role of NLRP3 inflammasome and its post transcriptional control by micro-RNAs in the regulation of cardiac metabolic function induced by PNOF in mice. METHODS AND RESULTS Based on a model of mice exposed to PNOF through litter size reduction, we observed increased cardiac protein expression levels of NLRP3 and ETS-1 associated with alterations in insulin signaling. Additionally, miR-193b levels were down-regulated in the adult hearts of overfed animals. In a cardiomyocyte cell line, transfection with miR-193b induced down-regulation of ETS-1 and NLRP3 and improved insulin signaling. CONCLUSIONS These findings suggest that the miR-193b could be involved in cardiac phenotypic changes observed in adulthood induced by PNOF likely through the regulation of ETS-1 and NLRP3 expression, and through this of insulin signaling.
Collapse
Affiliation(s)
- B Siddeek
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland.
| | - N Li
- Equipe Physiopathologie et Epidémiologie Cérébro-Cardiovasculaires (PEC2, EA7460), UFR Sciences de Santé, Université de Bourgogne Franche-Comté, Dijon, France
| | - C Mauduit
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, Nice, France
| | - H Chehade
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - E Rigal
- Equipe Physiopathologie et Epidémiologie Cérébro-Cardiovasculaires (PEC2, EA7460), UFR Sciences de Santé, Université de Bourgogne Franche-Comté, Dijon, France
| | - J-F Tolsa
- Woman-Mother-Child Department, Division of Neonatology, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - J-B Armengaud
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - C Yzydorczyk
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| | - M Benahmed
- INSERM U1065, Centre Méditerranéen de Médecine Moléculaire (C3M), Team 5, Nice, France
| | - C Vergely
- Equipe Physiopathologie et Epidémiologie Cérébro-Cardiovasculaires (PEC2, EA7460), UFR Sciences de Santé, Université de Bourgogne Franche-Comté, Dijon, France
| | - U Simeoni
- Woman-Mother-Child Department, Division of Pediatrics, DOHaD Laboratory, Centre Hospitalier Universitaire Vaudois and University of Lausanne, Lausanne, Switzerland
| |
Collapse
|
10
|
Abstract
Epidemiological and experimental observations tend to prove that environment, lifestyle or nutritional challenges influence heart functions together with genetic factors. Furthermore, when occurring during sensitive windows of heart development, these environmental challenges can induce an 'altered programming' of heart development and shape the future heart disease risk. In the etiology of heart diseases driven by environmental challenges, epigenetics has been highlighted as an underlying mechanism, constituting a bridge between environment and heart health. In particular, micro-RNAs which are involved in each step of heart development and functions seem to play a crucial role in the unfavorable programming of heart diseases. This review describes the latest advances in micro-RNA research in heart diseases driven by early exposure to challenges and discusses the use of micro-RNAs as potential targets in the reversal of the pathophysiology.
Collapse
|