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Dali O, Muriel-Muriel JA, Vargas-Baco A, Tevosian S, Zubcevic J, Smagulova F, Hayward LF. Prenatal nicotine exposure leads to epigenetic alterations in peripheral nervous system signaling genes in the testis of the rat. Epigenetics Chromatin 2024; 17:14. [PMID: 38715099 PMCID: PMC11075221 DOI: 10.1186/s13072-024-00539-5] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/22/2024] [Accepted: 04/20/2024] [Indexed: 05/12/2024] Open
Abstract
BACKGROUND Prenatal nicotine exposure (PNE) has been documented to cause numerous deleterious effects on fetal development. However, the epigenetic changes promoted by nicotine exposure on germ cells are still not well understood. OBJECTIVES In this study, we focused on elucidating the impact of prenatal nicotine exposure on regulatory epigenetic mechanisms important for germ cell development. METHODS Sprague-Dawley rats were exposed to nicotine during pregnancy and male progeny was analyzed at 11 weeks of age. Testis morphology was analyzed using frozen testis sections and expression of germ cell markers was examined by RT-qPCR; histone modifications were assessed by Western Blot (WB). DNA methylation analysis was performed by methylation-specific PCR of bisulfite converted DNA. Genome-wide DNA methylation was analyzed using Methylated DNA immunoprecipitation (MeDIP)-seq. We also carried out transcriptomics analysis of pituitary glands by RNA-seq. RESULTS We show that gestational exposure to nicotine reduces germ cell numbers, perturbs meiosis, affects the expression of germ line reprogramming responsive genes, and impacts the DNA methylation of nervous system genes in the testis. PNE also causes perturbation of gene expression in the pituitary gland of the brain. CONCLUSIONS Our data demonstrate that PNE leads to perturbation of male spermatogenesis, and the observed effects are associated with changes of peripheral nervous system signaling pathways. Alterations in the expression of genes associated with diverse biological activities such as cell migration, cell adhesion and GABA signaling in the pituitary gland underscore the complexity of the effects of nicotine exposure during pregnancy.
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Affiliation(s)
- Ouzna Dali
- EHESP, Inserm, Irset (Institut de recherche en sante, environnement et travail)-UMR_S 1085, Univ. Rennes, 35000, Rennes, France
| | - Jose Antonio Muriel-Muriel
- EHESP, Inserm, Irset (Institut de recherche en sante, environnement et travail)-UMR_S 1085, Univ. Rennes, 35000, Rennes, France
| | - Ana Vargas-Baco
- EHESP, Inserm, Irset (Institut de recherche en sante, environnement et travail)-UMR_S 1085, Univ. Rennes, 35000, Rennes, France
| | - Sergei Tevosian
- Department of Physiological Sciences, University of Florida, 1333 Center Drive, Box 100144, Gainesville, FL, 32610, USA
| | - Jasenka Zubcevic
- Department of Physiology and Pharmacology, University of Toledo, Toledo, OH, USA
| | - Fatima Smagulova
- EHESP, Inserm, Irset (Institut de recherche en sante, environnement et travail)-UMR_S 1085, Univ. Rennes, 35000, Rennes, France.
| | - Linda F Hayward
- Department of Physiological Sciences, University of Florida, 1333 Center Drive, Box 100144, Gainesville, FL, 32610, USA
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Zhao Y, Li B, Cao H, Wang F, Mu M, Jin H, Liu J, Fan Z, Tao X. Maternal nicotine exposure promotes hippocampal CeRNA-mediated excitotoxicity and social barriers in adolescent offspring mice. ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY 2024; 273:116079. [PMID: 38377778 DOI: 10.1016/j.ecoenv.2024.116079] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2023] [Revised: 01/18/2024] [Accepted: 02/04/2024] [Indexed: 02/22/2024]
Abstract
Nicotine, an addictive component of cigarettes, causes cognitive defects, particularly when exposure occurs early in life. However, the exact mechanism through which nicotine causes toxicity and alters synaptic plasticity is still not fully understood. The aim of the current study is to examine how non-coding developmental regulatory RNA impacts the hippocampus of mice offspring whose mothers were exposed to nicotine. Female C57BL/6J mice were given nicotine water from one week before pregnancy until end of lactation. Hippocampal tissue from offspring at 20 days post-birth was used for LncRNA and mRNA microarray analysis. Differential expression of LncRNAs and mRNAs associated with neuronal development were screened and validated, and the CeRNA pathway mediating neuronal synaptic plasticity GM13530/miR-7119-3p/mef2c was predicted using LncBase Predicted v.2. Using protein immunoblotting, Golgi staining and behavioral tests, our findings revealed that nicotine exposure in offspring mice increased hippocampal NMDAR receptor, activated receptor-dependent calcium channels, enhanced the formation of NMDAR/nNOS/PSD95 ternary complexes, increased NO synthesis, mediated p38 activation, induced neuronal excitability toxicity. Furthermore, an epigenetic CeRNA regulatory mechanism was identified, which suppresses Mef2c-mediated synaptic plasticity and leads to modifications in the learning and social behavior of the offspring during adolescence. This study uncovers the way in which maternal nicotine exposure results in neurotoxicity in offspring.
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Affiliation(s)
- Yehong Zhao
- Joint Research Center for Occupational Medicine and Health of IHM, Anhui University of Science and Technology, Huainan 232000, China; Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, Anhui University of Science and Technology, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Bing Li
- Joint Research Center for Occupational Medicine and Health of IHM, Anhui University of Science and Technology, Huainan 232000, China; Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, Anhui University of Science and Technology, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Hangbing Cao
- Joint Research Center for Occupational Medicine and Health of IHM, Anhui University of Science and Technology, Huainan 232000, China; Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, Anhui University of Science and Technology, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Fei Wang
- Joint Research Center for Occupational Medicine and Health of IHM, Anhui University of Science and Technology, Huainan 232000, China; Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, Anhui University of Science and Technology, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Min Mu
- Joint Research Center for Occupational Medicine and Health of IHM, Anhui University of Science and Technology, Huainan 232000, China; Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, Anhui University of Science and Technology, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Haibo Jin
- Joint Research Center for Occupational Medicine and Health of IHM, Anhui University of Science and Technology, Huainan 232000, China; Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, Anhui University of Science and Technology, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Jing Liu
- The First Hospital of Anhui University of Science and Technology, Huainan, China
| | - Zhenzhen Fan
- Joint Research Center for Occupational Medicine and Health of IHM, Anhui University of Science and Technology, Huainan 232000, China; Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, Anhui University of Science and Technology, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China
| | - Xinrong Tao
- Joint Research Center for Occupational Medicine and Health of IHM, Anhui University of Science and Technology, Huainan 232000, China; Key Laboratory of Industrial Dust Control and Occupational Health of the Ministry of Education, Anhui University of Science and Technology, China; Key Laboratory of Industrial Dust Deep Reduction and Occupational Health and Safety of Anhui Higher Education Institutes, Anhui University of Science and Technology, China; Anhui Province Engineering Laboratory of Occupational Health and Safety, Anhui University of Science and Technology, China; School of Medicine, Department of Medical Frontier Experimental Center, Anhui University of Science and Technology, China.
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3
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Zhang T, Yang K, Chen Y, Jiang Y, Zhou Z, Liu J, Du Y, Wang L, Han X, Wu X, Wang X. Impaired autophagy flux by lncRNA NEAT1 is critical for inflammation factors production in human periodontal ligament stem cells with nicotine treatment. J Periodontal Res 2023; 58:70-82. [PMID: 36346119 DOI: 10.1111/jre.13069] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 10/11/2022] [Accepted: 10/18/2022] [Indexed: 11/10/2022]
Abstract
BACKGROUND AND OBJECTIVES Periodontitis is the top reason for tooth loss, and smoking significantly increases severe periodontitis risk. Defective autophagy has been reported to play a vital role in periodontitis. This study aimed to elucidate the relationship between autophagy and inflammation factors production in nicotine-treated periodontal ligament stem cells (PDLSCs) and the underlying mechanism. METHODS In this study, transmission electron microscopy, immunofluorescence, and the mCherry-GFP-LC3 plasmid were used to study autophagy flux. The gene levels of inflammation factors and long noncoding RNA nuclear paraspeckle assembly transcript 1 (lncRNA NEAT1) were detected by quantitative real-time PCR (qRT-PCR). Western blot was performed to assess the protein levels of autophagic markers and α7 nicotinic acetylcholine receptor (α7nAChR). RESULTS We found that nicotine impaired autophagosome-lysosome fusion and lysosome functions to block autophagy flux, contributing to inflammatory factors production in nicotine-treated PDLSCs. Moreover, nicotine upregulated NEAT1 by activating α7nAChR. NEAT1 decreased autophagy flux by downregulating syntaxin 17 (STX17). CONCLUSION Our data indicate that NEAT1-decreased autophagy flux is pivotal for inflammation factors production in nicotine-treated PDLSCs.
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Affiliation(s)
- Taotao Zhang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Kuan Yang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Yujiang Chen
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Yuran Jiang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Zhifei Zhou
- Department of Stomatology, General Hospital of Tibetan Military Command, Lhasa, China
| | - Jiajia Liu
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Yang Du
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Lulu Wang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Xinxin Han
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
| | - Xingan Wu
- Department of Microbiology, School of Basic Medicine, Fourth Military Medical University, Xi'an, China
| | - Xiaojing Wang
- State Key Laboratory of Military Stomatology, National Clinical Research Center for Oral Diseases, Shaanxi Key Laboratory of Stomatology, Department of Pediatric Dentistry, School of Stomatology, Fourth Military Medical University, Xi'an, China
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4
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Chuang TD, Ansari A, Yu C, Sakurai R, Harb A, Liu J, Khorram O, Rehan VK. Mechanism underlying increased cardiac extracellular matrix deposition in perinatal nicotine-exposed offspring. Am J Physiol Heart Circ Physiol 2020; 319:H651-H660. [PMID: 32795172 DOI: 10.1152/ajpheart.00021.2020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 02/07/2023]
Abstract
Although increased predisposition to cardiac fibrosis and cardiac dysfunction has been demonstrated in the perinatally nicotine-exposed heart, the underlying mechanisms remain unclear. With the use of a well-established rat model and cultured primary neonatal rat cardiac fibroblasts, the effect of perinatal nicotine exposure on offspring heart extracellular matrix deposition and the likely underlying mechanisms were investigated. Perinatal nicotine exposure resulted in increased collagen type I (COL1A1) and III (COL3A1) deposition along with a decrease in miR-29 family and an increase in long noncoding RNA myocardial infarction-associated transcript (MIAT) levels in offspring heart. Nicotine treatment of isolated primary neonatal rat cardiac fibroblasts suggested that these effects were mediated via nicotinic acetylcholine receptors including α7 and the induced collagens accumulation was reversed by a gain-of function of miR-29 family. Knockdown of MIAT resulted in increased miR-29 family and decreased COL1A1 and COL3A1 levels, suggesting nicotine-mediated MIAT induction as the underlying mechanism for nicotine-induced collagen deposition. Luciferase reporter assay and RNA immunoprecipitation studies showed an intense physical interaction between MIAT, miR-29 family, and argonaute 2, corroborating the mechanistic link between perinatal nicotine exposure and increased extracellular matrix deposition. Overall, perinatal nicotine exposure resulted in lower miR-29 family levels in offspring heart, while it elevated cardiac MIAT and collagen type I and III levels. These findings provide mechanistic basis for cardiac dysfunction in perinatal nicotine-exposed offspring and offer multiple novel potential therapeutic targets.NEW & NOTEWORTHY Using an established rat model and cultured primary neonatal cardiac fibroblasts, we show that nicotine mediated MIAT induction as the underlying mechanism for the excessive cardiac collagen deposition. These observations provide mechanistic basis for the increased predisposition to cardiac dysfunction following perinatal cigarette/nicotine exposure and offer novel potential therapeutic targets.
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Affiliation(s)
- Tsai-Der Chuang
- Department of and Obstetrics, Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles Medical Center, David Geffen School of Medicine at University of California Los Angeles, Torrance, California
| | - Aamir Ansari
- Department of Pediatrics, Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles Medical Center, David Geffen School of Medicine at University of California Los Angeles, Torrance, California
| | - Celia Yu
- Department of Pediatrics, Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles Medical Center, David Geffen School of Medicine at University of California Los Angeles, Torrance, California
| | - Reiko Sakurai
- Department of Pediatrics, Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles Medical Center, David Geffen School of Medicine at University of California Los Angeles, Torrance, California
| | - Amir Harb
- Department of Pediatrics, Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles Medical Center, David Geffen School of Medicine at University of California Los Angeles, Torrance, California
| | - Jie Liu
- Department of Pediatrics, Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles Medical Center, David Geffen School of Medicine at University of California Los Angeles, Torrance, California
| | - Omid Khorram
- Department of and Obstetrics, Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles Medical Center, David Geffen School of Medicine at University of California Los Angeles, Torrance, California
| | - Virender K Rehan
- Department of Pediatrics, Lundquist Institute for Biomedical Innovation at Harbor-University of California Los Angeles Medical Center, David Geffen School of Medicine at University of California Los Angeles, Torrance, California
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5
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Blaskovic S, Donati Y, Zanetti F, Ruchonnet-Métrailler I, Lemeille S, Cremona TP, Schittny JC, Barazzone-Argiroffo C. Gestation and lactation exposure to nicotine induces transient postnatal changes in lung alveolar development. Am J Physiol Lung Cell Mol Physiol 2020; 318:L606-L618. [PMID: 31967849 DOI: 10.1152/ajplung.00228.2019] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022] Open
Abstract
Harmful consequences of cigarette smoke (CS) exposure during lung development can already manifest in infancy. In particular, early life exposure to nicotine, the main component of CS, was shown to affect lung development in animal models. We aimed to characterize the effect of nicotine on alveoli formation. We analyzed the kinetics of normal alveolar development during the alveolarization phase and then looked at the effect of nicotine in a mouse model of gestational and early life exposure. Immunohistochemical staining revealed that the wave of cell proliferation [i.e., vascular endothelial cells, alveolar epithelial cells (AEC) type II and mesenchymal cell] occurs at postnatal day (pnd) 8 in control and nicotine-exposed lungs. However, FACS analysis of individual epithelial alveolar cells revealed nicotine-induced transient increase of AEC type I proliferation and decrease of vascular endothelial cell proliferation at pnd8. Furthermore, nicotine increased the percentage of endothelial cells at pnd2. Transcriptomic data also showed significant changes in nicotine samples compared with the controls on cell cycle-associated genes at pnd2 but not anymore at pnd16. Accordingly, the expression of survivin, involved in cell cycle regulation, also follows a different kinetics in nicotine lung extracts. These changes resulted in an increased lung size detected by stereology at pnd16 but no longer in adult age, suggesting that nicotine can act on the pace of lung maturation. Taken together, our results indicate that early life nicotine exposure could be harmful to alveolar development independently from other toxicants contained in CS.
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Affiliation(s)
- Sanja Blaskovic
- Department of Pediatrics, Gynecology, and Obstetrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Switzerland
| | - Yves Donati
- Department of Pediatrics, Gynecology, and Obstetrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Switzerland
| | - Filippo Zanetti
- Department of Pediatrics, Gynecology, and Obstetrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Switzerland
| | - Isabelle Ruchonnet-Métrailler
- Department of Pediatrics, Gynecology, and Obstetrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Switzerland
| | - Sylvain Lemeille
- Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Switzerland
| | - Tiziana P Cremona
- Molecular and Integrative Physiological Sciences Program, Department of Environmental Health, Harvard T. H. Chan School of Public Health, Boston, Massachusetts
| | | | - Constance Barazzone-Argiroffo
- Department of Pediatrics, Gynecology, and Obstetrics, Faculty of Medicine, University of Geneva, Geneva, Switzerland.,Department of Pathology and Immunology, Faculty of Medicine, University of Geneva, Switzerland
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6
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Zapata I, Moraes LE, Fiala EM, Zaldivar-Lopez S, Couto CG, Rowell JL, Alvarez CE. Risk-modeling of dog osteosarcoma genome scans shows individuals with Mendelian-level polygenic risk are common. BMC Genomics 2019; 20:226. [PMID: 30890123 PMCID: PMC6425649 DOI: 10.1186/s12864-019-5531-6] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2018] [Accepted: 02/13/2019] [Indexed: 12/14/2022] Open
Abstract
Background Despite the tremendous therapeutic advances that have stemmed from somatic oncogenetics, survival of some cancers has not improved in 50 years. Osteosarcoma still has a 5-year survival rate of 66%. We propose the natural canine osteosarcoma model can change that: it is extremely similar to the human condition, except for being highly heritable and having a dramatically higher incidence. Here we reanalyze published genome scans of osteosarcoma in three frequently-affected dog breeds and report entirely new understandings with immediate translational indications. Results First, meta-analysis revealed association near FGF9, which has strong biological and therapeutic relevance. Secondly, risk-modeling by multiple logistic regression shows 22 of the 34 associated loci contribute to risk and eight have large effect sizes. We validated the Greyhound stepwise model in our own, independent, case-control cohort. Lastly, we updated the gene annotation from approximately 50 genes to 175, and prioritized those using cross-species genomics data. Mostly positional evidence suggests 13 genes are likely to be associated with mapped risk (including MTMR9, EWSR1 retrogene, TANGO2 and FGF9). Previous annotation included seven of those 13 and prioritized four by pathway enrichment. Ten of our 13 priority genes are in loci that contribute to risk modeling and thus can be studied epidemiologically and translationally in pet dogs. Other new candidates include MYCN, SVIL and MIR100HG. Conclusions Polygenic osteosarcoma-risk commonly rises to Mendelian-levels in some dog breeds. This justifies caninized animal models and targeted clinical trials in pet dogs (e.g., using CDK4/6 and FGFR1/2 inhibitors). Electronic supplementary material The online version of this article (10.1186/s12864-019-5531-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Isain Zapata
- Department of Veterinary Clinical Sciences, The Ohio State University College of Veterinary Medicine, Columbus, OH, USA.
| | - Luis E Moraes
- Department of Animal Sciences, The Ohio State University College of Food, Agricultural and Environmental Sciences, Columbus, OH, USA
| | - Elise M Fiala
- Center for Molecular and Human Genetics, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Present address: Clinical Genetics Service, Memorial Sloan Kettering Cancer Center, New York, NY, USA
| | - Sara Zaldivar-Lopez
- Department of Veterinary Clinical Sciences, The Ohio State University College of Veterinary Medicine, Columbus, OH, USA.,Present address: Genomics and Animal Breeding Group, Department of Genetics, Faculty of Veterinary Medicine, University of Cordoba, 14071, Córdoba, Spain
| | - C Guillermo Couto
- Department of Veterinary Clinical Sciences, The Ohio State University College of Veterinary Medicine, Columbus, OH, USA.,Couto Veterinary Consultants, Hilliard, OH, USA
| | - Jennie L Rowell
- Center for Molecular and Human Genetics, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA.,Department of Nursing, The Ohio State University College of Nursing, Columbus, OH, USA
| | - Carlos E Alvarez
- Department of Veterinary Clinical Sciences, The Ohio State University College of Veterinary Medicine, Columbus, OH, USA. .,Center for Molecular and Human Genetics, The Research Institute at Nationwide Children's Hospital, Columbus, OH, USA. .,Department of Pediatrics, The Ohio State University College of Medicine, Columbus, OH, USA.
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7
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He Z, Gao Y, Lieu L, Afrin S, Guo H, Williams KW. Acute effects of zinc and insulin on arcuate anorexigenic proopiomelanocortin neurons. Br J Pharmacol 2019; 176:725-736. [PMID: 30521677 PMCID: PMC6365359 DOI: 10.1111/bph.14559] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/12/2018] [Revised: 11/15/2018] [Accepted: 11/24/2018] [Indexed: 01/09/2023] Open
Abstract
BACKGROUND AND PURPOSE Acute insulin administration hyperpolarized, with concomitant decrease of firing rate, a subpopulation of arcuate proopiomelanocortin (POMC) and neuropeptide Y/agouti-related peptide cells. This rapid effect on cellular activity has been proposed as a cellular correlate of insulin effects on energy balance and glucose homoeostasis. Recent evidence suggests that zinc in mammalian insulin formulations is required for the insulin-induced inhibition of arcuate POMC neurons, while guinea pig insulin, which fails to bind zinc, activates POMC neurons in mice. Here, we tested the effects of zinc and insulin formations on arcuate POMC neurons. EXPERIMENTAL APPROACH Effects of zinc and insulin formulations were assessed through whole-cell patch clamp recordings on transgenic mice in vitro. KEY RESULTS Insulin formulations containing zinc hyperpolarized POMC neurons. Zinc also hyperpolarized arcuate POMC neurons, albeit at much higher concentration than found in various insulin formulations. Chelation of zinc inhibited the zinc-induced hyperpolarization of POMC neurons, whereas effects of insulin on POMC cellular activity were unchanged after chelation. Zinc-free insulin also hyperpolarized arcuate POMC neurons. Insulin failed to hyperpolarize POMC neurons deficient for insulin receptors, suggesting that insulin receptors are required for these effects. Activation of POMC neurons by guinea pig insulin was independent of insulin receptors but was inhibited by PDGF receptor antagonism or loss of TRPC5 channel subunits. CONCLUSIONS AND IMPLICATIONS Together, these findings suggest that insulin inhibited arcuate POMC neurons independent of zinc and highlights a possible role of putative PDGF receptors in the acute effects of guinea pig insulin.
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Affiliation(s)
- Zhenyan He
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang HospitalSouthern Medical UniversityGuangzhouChina
- Division of Hypothalamic Research, Department of Internal MedicineThe University of Texas Southwestern Medical Center at DallasDallasTXUSA
| | - Yong Gao
- National Laboratory of Medical Molecular Biology, Institute of Basic Medical SciencesChinese Academy of Medical Sciences and Peking Union Medical CollegeBeijingChina
- Division of Hypothalamic Research, Department of Internal MedicineThe University of Texas Southwestern Medical Center at DallasDallasTXUSA
| | - Linh Lieu
- Division of Hypothalamic Research, Department of Internal MedicineThe University of Texas Southwestern Medical Center at DallasDallasTXUSA
| | - Sadia Afrin
- Division of Hypothalamic Research, Department of Internal MedicineThe University of Texas Southwestern Medical Center at DallasDallasTXUSA
| | - Hongbo Guo
- The National Key Clinical Specialty, The Engineering Technology Research Center of Education Ministry of China, Guangdong Provincial Key Laboratory on Brain Function Repair and Regeneration, Department of Neurosurgery, Zhujiang HospitalSouthern Medical UniversityGuangzhouChina
| | - Kevin W Williams
- Division of Hypothalamic Research, Department of Internal MedicineThe University of Texas Southwestern Medical Center at DallasDallasTXUSA
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8
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De Sa Nogueira D, Merienne K, Befort K. Neuroepigenetics and addictive behaviors: Where do we stand? Neurosci Biobehav Rev 2018; 106:58-72. [PMID: 30205119 DOI: 10.1016/j.neubiorev.2018.08.018] [Citation(s) in RCA: 18] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/19/2018] [Revised: 07/28/2018] [Accepted: 08/29/2018] [Indexed: 12/21/2022]
Abstract
Substance use disorders involve long-term changes in the brain that lead to compulsive drug seeking, craving, and a high probability of relapse. Recent findings have highlighted the role of epigenetic regulations in controlling chromatin access and regulation of gene expression following exposure to drugs of abuse. In the present review, we focus on data investigating genome-wide epigenetic modifications in the brain of addicted patients or in rodent models exposed to drugs of abuse, with a particular focus on DNA methylation and histone modifications associated with transcriptional studies. We highlight critical factors for epigenomic studies in addiction. We discuss new findings related to psychostimulants, alcohol, opiate, nicotine and cannabinoids. We examine the possible transmission of these changes across generations. We highlight developing tools, specifically those that allow investigation of structural reorganization of the chromatin. These have the potential to increase our understanding of alteration of chromatin architecture at gene regulatory regions. Neuroepigenetic mechanisms involved in addictive behaviors could explain persistent phenotypic effects of drugs and, in particular, vulnerability to relapse.
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Affiliation(s)
- David De Sa Nogueira
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), UMR 7364, CNRS, Université de Strasbourg, Team 3 « Abuse of Drugs and Neuroadaptations », Faculté de Psychologie, 12 rue Goethe, F-67000, France
| | - Karine Merienne
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), UMR 7364, CNRS, Université de Strasbourg, Team 1 « Dynamics of Memory and Epigenetics », Faculté de Psychologie, 12 rue Goethe, F-67000, France
| | - Katia Befort
- Laboratoire de Neurosciences Cognitives et Adaptatives (LNCA), UMR 7364, CNRS, Université de Strasbourg, Team 3 « Abuse of Drugs and Neuroadaptations », Faculté de Psychologie, 12 rue Goethe, F-67000, France.
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Silva CP, Horton WJ, Caruso MJ, Sebastian A, Klein LC, Albert I, Kamens HM. The influence of adolescent nicotine exposure on ethanol intake and brain gene expression. PLoS One 2018; 13:e0198935. [PMID: 29912970 PMCID: PMC6005571 DOI: 10.1371/journal.pone.0198935] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2018] [Accepted: 05/29/2018] [Indexed: 01/14/2023] Open
Abstract
Nicotine and alcohol are often co-abused. Adolescence is a vulnerable period for the initiation of both nicotine and alcohol use, which can lead to subsequent neurodevelopmental and behavioral alterations. It is possible that during this vulnerable period, use of one drug leads to neurobiological alterations that affect subsequent consumption of the other drug. The aim of the present study was to determine the effect of nicotine exposure during adolescence on ethanol intake, and the effect of these substances on brain gene expression. Forty-three adolescent female C57BL/6J mice were assigned to four groups. In the first phase of the experiment, adolescent mice (PND 36-41 days) were exposed to three bottles filled with water or nicotine (200 μg/ml) for 22 h a day and a single bottle of water 2 h a day for six days. In the second phase (PND 42-45 days), the 4-day Drinking-in-the-Dark paradigm consisting of access to 20% v/v ethanol or water for 2h or 4h (the last day) was overlaid during the time when the mice did not have nicotine available. Ethanol consumption (g/kg) and blood ethanol concentrations (BEC, mg %) were measured on the final day and whole brains including the cerebellum, were dissected for RNA sequencing. Differentially expressed genes (DEG) were detected with CuffDiff and gene networks were built using WGCNA. Prior nicotine exposure increased ethanol consumption and resulting BEC. Significant DEG and biological pathways found in the group exposed to both nicotine and ethanol included genes important in stress-related neuropeptide signaling, hypothalamic-pituitary-adrenal (HPA) axis activity, glutamate release, GABA signaling, and dopamine release. These results replicate our earlier findings that nicotine exposure during adolescence increases ethanol consumption and extends this work by examining gene expression differences which could mediate these behavioral effects.
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Affiliation(s)
- Constanza P. Silva
- Biobehavioral Health Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - William J. Horton
- Department of Animal Science, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Michael J. Caruso
- Biobehavioral Health Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Aswathy Sebastian
- Biochemistry and Molecular Biology, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Laura C. Klein
- Biobehavioral Health Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Istvan Albert
- Biochemistry and Molecular Biology, Pennsylvania State University, University Park, Pennsylvania, United States of America
| | - Helen M. Kamens
- Biobehavioral Health Department, Pennsylvania State University, University Park, Pennsylvania, United States of America
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Sartor GC, Powell SK, Velmeshev D, Lin DY, Magistri M, Wiedner HJ, Malvezzi AM, Andrade NS, Faghihi MA, Wahlestedt C. Cocaine alters Homer1 natural antisense transcript in the nucleus accumbens. Mol Cell Neurosci 2017; 85:183-189. [PMID: 29055697 PMCID: PMC5698162 DOI: 10.1016/j.mcn.2017.10.003] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/13/2017] [Revised: 09/19/2017] [Accepted: 10/09/2017] [Indexed: 12/29/2022] Open
Abstract
Natural antisense transcripts (NATs) are an abundant class of long noncoding RNAs that have recently been shown to be key regulators of chromatin dynamics and gene expression in nervous system development and neurological disorders. However, it is currently unclear if NAT-based mechanisms also play a role in drug-induced neuroadaptations. Aberrant regulation of gene expression is one critical factor underlying the long-lasting behavioral abnormalities that characterize substance use disorder, and it is possible that some drug-induced transcriptional responses are mediated, in part, by perturbations in NAT activity. To test this hypothesis, we used an automated algorithm that mines the NCBI AceView transcriptomics database to identify NAT overlapping genes linked to addiction. We found that 22% of the genes examined contain NATs and that expression of Homer1 natural antisense transcript (Homer1-AS) was altered in the nucleus accumbens (NAc) of mice 2h and 10days following repeated cocaine administration. In in vitro studies, depletion of Homer1-AS lead to an increase in the corresponding sense gene expression, indicating a potential regulatory mechanisms of Homer1 expression by its corresponding antisense transcript. Future in vivo studies are needed to definitely determine a role for Homer1-AS in cocaine-induced behavioral and molecular adaptations.
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Affiliation(s)
- Gregory C Sartor
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - Samuel K Powell
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - Dmitry Velmeshev
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - David Y Lin
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - Marco Magistri
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - Hannah J Wiedner
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - Andrea M Malvezzi
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - Nadja S Andrade
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - Mohammad A Faghihi
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States
| | - Claes Wahlestedt
- Center for Therapeutic Innovation and Department of Psychiatry and Behavioral Sciences, University of Miami Miller School of Medicine, Miami, FL 33136, United States.
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