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Anderberg RH, Andersson EA, Bucher V, Preissner KT, Mallard C, Ek CJ. Treatment with RNase alleviates brain injury but not neuroinflammation in neonatal hypoxia/ischemia. J Neurosci Res 2024; 102:e25329. [PMID: 38597144 DOI: 10.1002/jnr.25329] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2023] [Revised: 03/14/2024] [Accepted: 03/30/2024] [Indexed: 04/11/2024]
Abstract
There is a need for new treatments to reduce brain injuries derived from neonatal hypoxia/ischemia. The only viable option used in the clinic today in infants born at term is therapeutic hypothermia, which has a limited efficacy. Treatments with exogenous RNase have shown great promise in a range of different adult animal models including stroke, ischemia/reperfusion injury, or experimental heart transplantation, often by conferring vascular protective and anti-inflammatory effects. However, any neuroprotective function of RNase treatment in the neonate remains unknown. Using a well-established model of neonatal hypoxic/ischemic brain injury, we evaluated the influence of RNase treatment on RNase activity, gray and white matter tissue loss, blood-brain barrier function, as well as levels and expression of inflammatory cytokines in the brain up to 6 h after the injury using multiplex immunoassay and RT-PCR. Intraperitoneal treatment with RNase increased RNase activity in both plasma and cerebropinal fluids. The RNase treatment resulted in a reduction of brain tissue loss but did not affect the blood-brain barrier function and had only a minor modulatory effect on the inflammatory response. It is concluded that RNase treatment may be promising as a neuroprotective regimen, whereas the mechanistic effects of this treatment appear to be different in the neonate compared to the adult and need further investigation.
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Affiliation(s)
- Rozita H Anderberg
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - E Axel Andersson
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Valentina Bucher
- Department of Obstetrics and Gynecology, Institute of Clinical Sciences, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - Klaus T Preissner
- Department of Cardiology, Medical School, Kerckhoff-Heart Research Institute, Justus-Liebig-University, Giessen, Germany
| | - Carina Mallard
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
| | - C Joakim Ek
- Institute of Neuroscience and Physiology, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
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2
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Grebstad Tune B, Melheim M, Åsegg-Atneosen M, Dotinga B, Saugstad OD, Solberg R, Baumbusch LO. Long Non-Coding RNAs in Hypoxia and Oxidative Stress: Novel Insights Investigating a Piglet Model of Perinatal Asphyxia. BIOLOGY 2023; 12:biology12040549. [PMID: 37106749 PMCID: PMC10135607 DOI: 10.3390/biology12040549] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 02/23/2023] [Revised: 03/24/2023] [Accepted: 03/29/2023] [Indexed: 04/08/2023]
Abstract
Birth asphyxia is the leading cause of death and disability in young children worldwide. Long non-coding RNAs (lncRNAs) may provide novel targets and intervention strategies due to their regulatory potential, as demonstrated in various diseases and conditions. We investigated cardinal lncRNAs involved in oxidative stress, hypoxia, apoptosis, and DNA damage using a piglet model of perinatal asphyxia. A total of 42 newborn piglets were randomized into 4 study arms: (1) hypoxia–normoxic reoxygenation, (2) hypoxia–3 min of hyperoxic reoxygenation, (3) hypoxia–30 min of hyperoxic reoxygenation, and (4) sham-operated controls. The expression of lncRNAs BDNF-AS, H19, MALAT1, ANRIL, TUG1, and PANDA, together with the related target genes VEGFA, BDNF, TP53, HIF1α, and TNFα, was assessed in the cortex, the hippocampus, the white matter, and the cerebellum using qPCR and Droplet Digital PCR. Exposure to hypoxia–reoxygenation significantly altered the transcription levels of BDNF-AS, H19, MALAT1, and ANRIL. BDNF-AS levels were significantly enhanced after both hypoxia and subsequent hyperoxic reoxygenation, 8% and 100% O2, respectively. Our observations suggest an emerging role for lncRNAs as part of the molecular response to hypoxia-induced damages during perinatal asphyxia. A better understanding of the regulatory properties of BDNF-AS and other lncRNAs may reveal novel targets and intervention strategies in the future.
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Affiliation(s)
- Benedicte Grebstad Tune
- Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0372 Oslo, Norway
- Department of Health, Nutrition and Management, Oslo Metropolitan University, 0130 Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway
| | - Maria Melheim
- Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0372 Oslo, Norway
| | | | - Baukje Dotinga
- Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0372 Oslo, Norway
- Department of Pediatrics, Division of Neonatology, Beatrix Children’s Hospital, University Medical Center Groningen, University of Groningen, 9713 GZ Groningen, The Netherlands
| | - Ola Didrik Saugstad
- Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0372 Oslo, Norway
- Institute of Clinical Medicine, University of Oslo, 0450 Oslo, Norway
| | - Rønnaug Solberg
- Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0372 Oslo, Norway
- Department of Pediatrics, Vestfold Hospital Trust, 3103 Tønsberg, Norway
| | - Lars Oliver Baumbusch
- Department of Pediatric Research, Division of Paediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, 0372 Oslo, Norway
- Faculty of Health, Welfare and Organization, Østfold University College, 1757 Halden, Norway
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3
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Tong Y, Zhang S, Riddle S, Song R, Yue D. Circular RNAs in the Origin of Developmental Lung Disease: Promising Diagnostic and Therapeutic Biomarkers. Biomolecules 2023; 13:biom13030533. [PMID: 36979468 PMCID: PMC10046088 DOI: 10.3390/biom13030533] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2023] [Revised: 03/11/2023] [Accepted: 03/12/2023] [Indexed: 03/17/2023] Open
Abstract
Circular RNA (circRNA) is a newly discovered noncoding RNA that regulates gene transcription, binds to RNA-related proteins, and encodes protein microRNAs (miRNAs). The development of molecular biomarkers such as circRNAs holds great promise in the diagnosis and prognosis of clinical disorders. Importantly, circRNA-mediated maternal-fetus risk factors including environmental (high altitude), maternal (preeclampsia, smoking, and chorioamnionitis), placental, and fetal (preterm birth and low birth weight) factors are the early origins and likely to contribute to the occurrence and progression of developmental and pediatric cardiopulmonary disorders. Although studies of circRNAs in normal cardiopulmonary development and developmental diseases have just begun, some studies have revealed their expression patterns. Here, we provide an overview of circRNAs’ biogenesis and biological functions. Furthermore, this review aims to emphasize the importance of circRNAs in maternal-fetus risk factors. Likewise, the potential biomarker and therapeutic target of circRNAs in developmental and pediatric lung diseases are explored.
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Affiliation(s)
- Yajie Tong
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, China
| | - Shuqing Zhang
- School of Pharmacy, China Medical University, Shenyang 110122, China
| | - Suzette Riddle
- Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA
| | - Rui Song
- Lawrence D. Longo MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA
- Correspondence: (R.S.); (D.Y.); Tel.: +01-909-558-4325 (R.S.); +86-24-9661551125 (D.Y.)
| | - Dongmei Yue
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, China
- Correspondence: (R.S.); (D.Y.); Tel.: +01-909-558-4325 (R.S.); +86-24-9661551125 (D.Y.)
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4
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Peeples ES. MicroRNA therapeutic targets in neonatal hypoxic-ischemic brain injury: a narrative review. Pediatr Res 2023; 93:780-788. [PMID: 35854090 DOI: 10.1038/s41390-022-02196-4] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 04/14/2022] [Revised: 05/25/2022] [Accepted: 06/28/2022] [Indexed: 11/11/2022]
Abstract
Neonatal hypoxic-ischemic brain injury (HIBI) is a devastating injury resulting from impaired blood flow and oxygen delivery to the brain at or around the time of birth. Despite the use of therapeutic hypothermia, more than one in four survivors suffer from major developmental disabilities-an indication of the critical need for more effective therapies. MicroRNAs (miRNA) have the potential to act as biomarkers and/or therapeutic targets in neonatal HIBI as a step toward improving outcomes in this high-risk population. This review summarizes the current literature around the use of cord blood and postnatal circulating blood miRNA expression for diagnosis or prognosis in human infants with hypoxic-ischemic encephalopathy, as well as animal studies assessing endogenous brain miRNA expression and potential for therapeutic targeting of miRNA expression for neuroprotection. Ultimately, the lack of knowledge regarding brain specificity of circulating miRNAs and the temporal variability in expression currently limit the use of miRNAs as biomarkers. However, given their broad effect profile, ease of administration, and small size allowing for effective blood-brain barrier crossing, miRNAs represent promising therapeutic targets for improving brain injury and reducing developmental impairments in neonates after HIBI. IMPACT: The high morbidity and mortality of neonatal hypoxic-ischemic brain injury (HIBI) despite current therapies demonstrates a need for developing more sensitive biomarkers and superior therapeutic options. MicroRNAs have been evaluated both as biomarkers and therapeutic options after neonatal HIBI. The limited knowledge regarding brain specificity of circulating microRNAs and temporal variability in expression currently limit the use of microRNAs as biomarkers. Future studies comparing the neuroprotective effects of modulating microRNA expression must consider temporal changes in the endogenous expression to determine appropriate timing of therapy, while also optimizing techniques for delivery.
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Affiliation(s)
- Eric S Peeples
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, USA.
- Children's Hospital & Medical Center, Omaha, NE, USA.
- Child Health Research Institute, Omaha, NE, USA.
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5
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Tregub PP. Effect of Hypercapnia and Hypoxia on the Physiology and Metabolism of the Cerebral Endothelium under Ischemic Conditions. J EVOL BIOCHEM PHYS+ 2022. [DOI: 10.1134/s0022093022030127] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
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6
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Peeples ES, Sahar NE, Snyder W, Mirnics K. Early Brain microRNA/mRNA Expression is Region-Specific After Neonatal Hypoxic-Ischemic Injury in a Mouse Model. Front Genet 2022; 13:841043. [PMID: 35251138 PMCID: PMC8890746 DOI: 10.3389/fgene.2022.841043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/21/2021] [Accepted: 01/25/2022] [Indexed: 11/13/2022] Open
Abstract
Background: MicroRNAs (miRNAs) may be promising therapeutic targets for neonatal hypoxic-ischemic brain injury (HIBI) but targeting miRNA-based therapy will require more precise understanding of endogenous brain miRNA expression. Methods: Postnatal day 9 mouse pups underwent HIBI by unilateral carotid ligation + hypoxia or sham surgery. Next-generation miRNA sequencing and mRNA Neuroinflammation panels were performed on ipsilateral cortex, striatum/thalamus, and cerebellum of each group at 30 min after injury. Targeted canonical pathways were predicted by KEGG analysis. Results: Sixty-one unique miRNAs showed differential expression (DE) in at least one region; nine in more than one region, including miR-410-5p, -1264-3p, 1298-5p, -5,126, and -34b-3p. Forty-four mRNAs showed DE in at least one region; 16 in more than one region. MiRNAs showing DE primarily targeted metabolic pathways, while mRNAs targeted inflammatory and cell death pathways. Minimal miRNA-mRNA interactions were seen at 30 min after HIBI. Conclusion: This study identified miRNAs that deserve future study to assess their potential as therapeutic targets in neonatal HIBI. Additionally, the differences in miRNA expression between regions suggest that future studies assessing brain miRNA expression to guide therapy development should consider evaluating individual brain regions rather than whole brain to ensure the sensitivity needed for the development of targeted therapies.
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Affiliation(s)
- Eric S. Peeples
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, United States
- Department of Pediatrics, Children’s Hospital & Medical Center, Omaha, NE, United States
- Child Health Research Institute, Omaha, NE, United States
| | - Namood-e Sahar
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, United States
- Child Health Research Institute, Omaha, NE, United States
| | - William Snyder
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, United States
- Child Health Research Institute, Omaha, NE, United States
| | - Karoly Mirnics
- Child Health Research Institute, Omaha, NE, United States
- Department of Biochemistry and Molecular Biology, University of Nebraska Medical Center, Omaha, NE, United States
- Department of Pharmacology and Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, United States
- Munroe-Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, United States
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7
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Peeples ES, Sahar NE, Snyder W, Mirnics K. Temporal brain microRNA expression changes in a mouse model of neonatal hypoxic-ischemic injury. Pediatr Res 2022; 91:92-100. [PMID: 34465878 PMCID: PMC9620396 DOI: 10.1038/s41390-021-01701-5] [Citation(s) in RCA: 4] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/11/2021] [Revised: 07/10/2021] [Accepted: 08/04/2021] [Indexed: 01/31/2023]
Abstract
BACKGROUND Neonatal hypoxic-ischemic brain injury (HIBI) results in significant morbidity and mortality despite current standard therapies. MicroRNAs (miRNAs) are a promising therapeutic target; however, there is a paucity of data on endogenous miRNA expression of the brain after HIBI during the primary therapeutic window (6-72 h after injury). METHODS Postnatal day 9 mouse pups underwent unilateral carotid ligation+hypoxia (HIBI), sham surgery+hypoxia, or sham surgery+normoxia (controls). miRNA sequencing was performed on the ipsilateral brain of each of the three groups plus the contralateral HIBI brain at 24 and 72 h after injury. Findings were validated in eight key miRNAs by quantitative polymerase chain reaction. RESULTS Hypoxia resulted in significant differential expression of 38 miRNAs at both time points. Mir-2137, -335, -137, and -376c were significantly altered by neonatal HIBI at 24 and 72 h, with 3 of the 4 demonstrating multiphasic expression (different direction of differential expression at 24 versus 72 h). CONCLUSIONS Our global assessment of subacute changes in brain miRNA expression after hypoxia or HIBI will advance research into targeted miRNA-based interventions. It will be important to consider the multiphasic miRNA expression patterns after HIBI to identify optimal timing for individual interventions. IMPACT This study is the first to comprehensively define endogenous brain microRNA expression changes outside of the first hours after neonatal hypoxic-ischemic brain injury (HIBI). Mir-2137, -335, -137, and -376c were significantly altered by neonatal HIBI and therefore deserve further investigation as possible therapeutic targets. The expression profiles described will support the design of future studies attempting to develop miRNA-based interventions for infants with HIBI. At 24 h after injury, contralateral HIBI miRNA expression patterns were more similar to ipsilateral HIBI than to controls, suggesting that the contralateral brain is not an appropriate "internal control" for miRNA studies in this model.
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Affiliation(s)
- Eric S Peeples
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, USA.
| | - Namood-E Sahar
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, USA
| | - William Snyder
- Department of Pediatrics, University of Nebraska Medical Center, Omaha, NE, USA
| | - Karoly Mirnics
- Department of Biochemistry & Molecular Biology, University of Nebraska Medical Center, Omaha, NE, USA
- Department of Pharmacology & Experimental Neuroscience, University of Nebraska Medical Center, Omaha, NE, USA
- Munroe-Meyer Institute for Genetics and Rehabilitation, University of Nebraska Medical Center, Omaha, NE, USA
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8
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Winkler I, Heisinger T, Hammerl M, Huber E, Urbanek M, Kiechl-Kohlendorfer U, Griesmaier E, Posod A. MicroRNA Expression Profiles as Diagnostic and Prognostic Biomarkers of Perinatal Asphyxia and Hypoxic-Ischaemic Encephalopathy. Neonatology 2022; 119:204-213. [PMID: 35073542 DOI: 10.1159/000521356] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/21/2021] [Accepted: 12/01/2021] [Indexed: 11/19/2022]
Abstract
INTRODUCTION Perinatal asphyxia is a leading cause of neonatal death. Up to one-third of asphyxiated neonates suffer from hypoxic-ischaemic encephalopathy (HIE) with substantial long-term morbidity. Currently available diagnostic and prognostic tools bear limitations, and additional reliable biomarkers are needed for all stages of clinical management. A novel tool in neuroscientific research is micro-ribonucleic acid (miRNA) profiling. The aim of the present study was to determine miRNA expression profiles of healthy and asphyxiated neonates with and without HIE and to assess their potential as diagnostic and prognostic biomarkers. METHODS We prospectively enrolled 49 neonates with a gestational age of ≥36 weeks, 15 of which fulfilled the diagnostic criteria of perinatal asphyxia and 34 served as healthy controls. Dried blood spots were collected from umbilical cord blood (UCB) and from venous blood upon admission to neonatal intensive care unit (NICU) and at 48 h of life. Samples were analysed by means of FirePlex™ technology (Abcam, Cambridge, MA, USA). RESULTS In the UCB, miRNA expression levels of hsa-mir-124-3p, hsa-mir-1285-5p, and hsa-mir-331-5p were significantly lower in asphyxiated neonates compared to healthy controls. Asphyxiated neonates requiring therapeutic hypothermia had significantly increased expression of hsa-miR-30e-5p and significantly decreased expression of hsa-miR-142-3p, hsa-miR-338-3p, hsa-miR-34b-3p, hsa-miR-497-5p, and hsa-miR-98-5p at the time of admission to the NICU. At 48 h, infants suffering from moderate/severe HIE with a poor long-term neurodevelopmental outcome showed a significant increase in hsa-mir-145-5p. DISCUSSION/CONCLUSION MiRNA profiling shows promise as a biomarker for perinatal asphyxia, hypothermia-requiring HIE, and poor neurodevelopmental outcome. Confirmatory studies are called for.
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Affiliation(s)
- Ira Winkler
- Department of Paediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
| | - Tatjana Heisinger
- Department of Paediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria.,Department of Urology, Medical University of Innsbruck, Innsbruck, Austria
| | - Marlene Hammerl
- Department of Paediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
| | - Eva Huber
- Department of Paediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
| | - Martina Urbanek
- Department of Paediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
| | | | - Elke Griesmaier
- Department of Paediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
| | - Anna Posod
- Department of Paediatrics II (Neonatology), Medical University of Innsbruck, Innsbruck, Austria
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Tong Y, Zhang S, Riddle S, Zhang L, Song R, Yue D. Intrauterine Hypoxia and Epigenetic Programming in Lung Development and Disease. Biomedicines 2021; 9:944. [PMID: 34440150 PMCID: PMC8394854 DOI: 10.3390/biomedicines9080944] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/24/2021] [Revised: 07/29/2021] [Accepted: 07/30/2021] [Indexed: 11/17/2022] Open
Abstract
Clinically, intrauterine hypoxia is the foremost cause of perinatal morbidity and developmental plasticity in the fetus and newborn infant. Under hypoxia, deviations occur in the lung cell epigenome. Epigenetic mechanisms (e.g., DNA methylation, histone modification, and miRNA expression) control phenotypic programming and are associated with physiological responses and the risk of developmental disorders, such as bronchopulmonary dysplasia. This developmental disorder is the most frequent chronic pulmonary complication in preterm labor. The pathogenesis of this disease involves many factors, including aberrant oxygen conditions and mechanical ventilation-mediated lung injury, infection/inflammation, and epigenetic/genetic risk factors. This review is focused on various aspects related to intrauterine hypoxia and epigenetic programming in lung development and disease, summarizes our current knowledge of hypoxia-induced epigenetic programming and discusses potential therapeutic interventions for lung disease.
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Affiliation(s)
- Yajie Tong
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, China;
| | - Shuqing Zhang
- School of Pharmacy, China Medical University, Shenyang 110122, China;
| | - Suzette Riddle
- Cardiovascular Pulmonary Research Laboratories, Departments of Pediatrics and Medicine, University of Colorado Anschutz Medical Campus, Aurora, CO 80045, USA;
| | - Lubo Zhang
- Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA;
| | - Rui Song
- Lawrence D. Longo, MD Center for Perinatal Biology, Department of Basic Sciences, Loma Linda University School of Medicine, Loma Linda, CA 92350, USA;
| | - Dongmei Yue
- Department of Pediatrics, Shengjing Hospital of China Medical University, Shenyang 110004, China;
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10
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Lingam I, Avdic-Belltheus A, Meehan C, Martinello K, Ragab S, Peebles D, Barkhuizen M, Tann CJ, Tachtsidis I, Wolfs TGAM, Hagberg H, Klein N, Fleiss B, Gressens P, Golay X, Kramer BW, Robertson NJ. Serial blood cytokine and chemokine mRNA and microRNA over 48 h are insult specific in a piglet model of inflammation-sensitized hypoxia-ischaemia. Pediatr Res 2021; 89:464-475. [PMID: 32521540 DOI: 10.1038/s41390-020-0986-3] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 12/02/2019] [Revised: 04/06/2020] [Accepted: 04/09/2020] [Indexed: 12/17/2022]
Abstract
BACKGROUND Exposure to inflammation exacerbates injury in neonatal encephalopathy (NE). We hypothesized that brain biomarker mRNA, cytokine mRNA and microRNA differentiate inflammation (E. coli LPS), hypoxia (Hypoxia), and inflammation-sensitized hypoxia (LPS+Hypoxia) in an NE piglet model. METHODS Sixteen piglets were randomized: (i) LPS 2 μg/kg bolus; 1 μg/kg infusion (LPS; n = 5), (ii) Saline with hypoxia (Hypoxia; n = 6), (iii) LPS commencing 4 h pre-hypoxia (LPS+Hypoxia; n = 5). Total RNA was acquired at baseline, 4 h after LPS and 1, 3, 6, 12, 24, 48 h post-insult (animals euthanized at 48 h). Quantitative PCR was performed for cytokines (IL1A, IL6, CXCL8, IL10, TNFA) and brain biomarkers (ENO2, UCHL1, S100B, GFAP, CRP, BDNF, MAPT). MicroRNA was detected using GeneChip (Affymetrix) microarrays. Fold changes from baseline were compared between groups and correlated with cell death (TUNEL) at 48 h. RESULTS Within 6 h post-insult, we observed increased IL1A, CXCL8, CCL2 and ENO2 mRNA in LPS+Hypoxia and LPS compared to Hypoxia. IL10 mRNA differentiated all groups. Four microRNAs differentiated LPS+Hypoxia and Hypoxia: hsa-miR-23a, 27a, 31-5p, 193-5p. Cell death correlated with TNFA (R = 0.69; p < 0.01) at 1-3 h and ENO2 (R = -0.69; p = 0.01) at 48 h. CONCLUSIONS mRNA and miRNA differentiated hypoxia from inflammation-sensitized hypoxia within 6 h in a piglet model. This information may inform human studies to enable triage for tailored neuroprotection in NE. IMPACT Early stratification of infants with neonatal encephalopathy is key to providing tailored neuroprotection. IL1A, CXCL8, IL10, CCL2 and NSE mRNA are promising biomarkers of inflammation-sensitized hypoxia. IL10 mRNA levels differentiated all three pathological states; fold changes from baseline was the highest in LPS+Hypoxia animals, followed by LPS and Hypoxia at 6 h. miR-23, -27, -31-5p and -193-5p were significantly upregulated within 6 h of a hypoxia insult. Functional analysis highlighted the diverse roles of miRNA in cellular processes.
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Affiliation(s)
- Ingran Lingam
- Neonatology, Institute for Women's Health, University College London, London, UK
| | | | - Christopher Meehan
- Neonatology, Institute for Women's Health, University College London, London, UK
| | - Kathryn Martinello
- Neonatology, Institute for Women's Health, University College London, London, UK.,Robinson Research Institute, University of Adelaide, Adelaide, SA, Australia
| | - Sara Ragab
- Neonatology, Institute for Women's Health, University College London, London, UK
| | - Donald Peebles
- Maternal Fetal Medicine, Institute for Women's Health, University College London, London, UK
| | - Melinda Barkhuizen
- Department of Pediatrics, University of Maastricht, Maastricht, The Netherlands
| | - Cally J Tann
- Neonatology, Institute for Women's Health, University College London, London, UK.,Maternal Adolescent, Reproductive and Child Health (MARCH) Centre, Department of Infectious Disease Epidemiology, London School of Hygiene and Tropical Medicine, London, UK
| | - Ilias Tachtsidis
- Medical Physics and Biomedical Engineering, University College London, London, UK
| | - Tim G A M Wolfs
- Department of Pediatrics, University of Maastricht, Maastricht, The Netherlands
| | - Henrik Hagberg
- Centre of Perinatal Medicine & Health, Department of Clinical Sciences, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Nigel Klein
- Paediatric Infectious Diseases & Immunology, Institute of Child Health, University College London, London, UK
| | - Bobbi Fleiss
- Centre for the Developing Brain, Kings College London, London, UK
| | - Pierre Gressens
- Centre for the Developing Brain, Kings College London, London, UK.,PROTECT, INSERM, Université Paris Diderot, Sorbonne Paris Cité, 75019, Paris, France
| | - Xavier Golay
- Department of Brain Repair & Rehabilitation, Institute of Neurology, University College London, London, UK
| | - Boris W Kramer
- Maternal Fetal Medicine, Institute for Women's Health, University College London, London, UK
| | - Nicola J Robertson
- Neonatology, Institute for Women's Health, University College London, London, UK.
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11
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Casey S, Goasdoue K, Miller SM, Brennan GP, Cowin G, O'Mahony AG, Burke C, Hallberg B, Boylan GB, Sullivan AM, Henshall DC, O'Keeffe GW, Mooney C, Bjorkman T, Murray DM. Temporally Altered miRNA Expression in a Piglet Model of Hypoxic Ischemic Brain Injury. Mol Neurobiol 2020; 57:4322-4344. [PMID: 32720074 PMCID: PMC7383124 DOI: 10.1007/s12035-020-02018-w] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2020] [Accepted: 07/08/2020] [Indexed: 12/21/2022]
Abstract
Hypoxic ischemic encephalopathy (HIE) is the most frequent cause of acquired infant brain injury. Early, clinically relevant biomarkers are required to allow timely application of therapeutic interventions. We previously reported early alterations in several microRNAs (miRNA) in umbilical cord blood at birth in infants with HIE. However, the exact timing of these alterations is unknown. Here, we report serial changes in six circulating, cross-species/bridging biomarkers in a clinically relevant porcine model of neonatal HIE with functional analysis. Six miRNAs—miR-374a, miR-181b, miR-181a, miR-151a, miR-148a and miR-128—were significantly and rapidly upregulated 1-h post-HI. Changes in miR-374a, miR-181b and miR-181a appeared specific to moderate-severe HI. Histopathological injury and five miRNAs displayed positive correlations and were predictive of MRS Lac/Cr ratios. Bioinformatic analysis identified that components of the bone morphogenic protein (BMP) family may be targets of miR-181a. Inhibition of miR-181a increased neurite length in both SH-SY5Y cells at 1 DIV (days in vitro) and in primary cultures of rat neuronal midbrain at 3 DIV. In agreement, inhibition of miR-181a increased expression of BMPR2 in differentiating SH-SY5Y cells. These miRNAs may therefore act as early biomarkers of HIE, thereby allowing for rapid diagnosis and timely therapeutic intervention and may regulate expression of signalling pathways vital to neuronal survival.
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Affiliation(s)
- Sophie Casey
- Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland. .,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland. .,Department of Anatomy and Neuroscience, University College Cork, Room 2.33, Western Gateway Building, Cork, Ireland.
| | - Kate Goasdoue
- Perinatal Research Centre, UQ Centre for Clinical Research, University of Queensland, Brisbane, Australia
| | - Stephanie M Miller
- Perinatal Research Centre, UQ Centre for Clinical Research, University of Queensland, Brisbane, Australia
| | - Gary P Brennan
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Gary Cowin
- National Imaging Facility, Centre for Advanced Imaging, University of Queensland, Brisbane, Australia
| | - Adam G O'Mahony
- Department of Anatomy and Neuroscience, University College Cork, Room 2.33, Western Gateway Building, Cork, Ireland
| | - Christopher Burke
- Department of Pathology, Royal Brisbane and Women's Hospital, Brisbane, Australia
| | - Boubou Hallberg
- Neonatology, Karolinska University Hospital, Stockholm, Sweden
| | - Geraldine B Boylan
- Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland
| | - Aideen M Sullivan
- Department of Anatomy and Neuroscience, University College Cork, Room 2.33, Western Gateway Building, Cork, Ireland
| | - David C Henshall
- Department of Physiology and Medical Physics, Royal College of Surgeons in Ireland, Dublin, Ireland.,FutureNeuro Research Centre, Royal College of Surgeons in Ireland, Dublin, Ireland
| | - Gerard W O'Keeffe
- Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland.,Department of Anatomy and Neuroscience, University College Cork, Room 2.33, Western Gateway Building, Cork, Ireland
| | - Catherine Mooney
- Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland.,FutureNeuro Research Centre, Royal College of Surgeons in Ireland, Dublin, Ireland.,School of Computer Science, University College Dublin, Dublin, Ireland
| | - Tracey Bjorkman
- Perinatal Research Centre, UQ Centre for Clinical Research, University of Queensland, Brisbane, Australia
| | - Deirdre M Murray
- Irish Centre for Fetal and Neonatal Translational Research (INFANT), University College Cork, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland
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12
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Bustelo M, Barkhuizen M, van den Hove DLA, Steinbusch HWM, Bruno MA, Loidl CF, Gavilanes AWD. Clinical Implications of Epigenetic Dysregulation in Perinatal Hypoxic-Ischemic Brain Damage. Front Neurol 2020; 11:483. [PMID: 32582011 PMCID: PMC7296108 DOI: 10.3389/fneur.2020.00483] [Citation(s) in RCA: 23] [Impact Index Per Article: 5.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/22/2019] [Accepted: 05/04/2020] [Indexed: 12/18/2022] Open
Abstract
Placental and fetal hypoxia caused by perinatal hypoxic-ischemic events are major causes of stillbirth, neonatal morbidity, and long-term neurological sequelae among surviving neonates. Brain hypoxia and associated pathological processes such as excitotoxicity, apoptosis, necrosis, and inflammation, are associated with lasting disruptions in epigenetic control of gene expression contributing to neurological dysfunction. Recent studies have pointed to DNA (de)methylation, histone modifications, and non-coding RNAs as crucial components of hypoxic-ischemic encephalopathy (HIE). The understanding of epigenetic dysregulation in HIE is essential in the development of new clinical interventions for perinatal HIE. Here, we summarize our current understanding of epigenetic mechanisms underlying the molecular pathology of HI brain damage and its clinical implications in terms of new diagnostic, prognostic, and therapeutic tools.
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Affiliation(s)
- Martín Bustelo
- Department of Pediatrics, Maastricht University Medical Center (MUMC), Maastricht, Netherlands.,Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, Netherlands.,Instituto de Ciencias Biomédicas, Facultad de Ciencias Médicas, Universidad Católica de Cuyo, San Juan, Argentina.,Laboratorio de Neuropatología Experimental, Facultad de Medicina, Instituto de Biología Celular y Neurociencias "Prof. E. De Robertis" (IBCN), Universidad de Buenos Aires, CONICET, Buenos Aires, Argentina
| | - Melinda Barkhuizen
- Department of Pediatrics, Maastricht University Medical Center (MUMC), Maastricht, Netherlands
| | - Daniel L A van den Hove
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, Netherlands.,Department of Psychiatry, Psychosomatics and Psychotherapy, University of Würzburg, Würzburg, Germany
| | - Harry Wilhelm M Steinbusch
- Department of Psychiatry and Neuropsychology, School for Mental Health and Neuroscience (MHeNs), Maastricht University, Maastricht, Netherlands
| | - Martín A Bruno
- Instituto de Ciencias Biomédicas, Facultad de Ciencias Médicas, Universidad Católica de Cuyo, San Juan, Argentina
| | - C Fabián Loidl
- Instituto de Ciencias Biomédicas, Facultad de Ciencias Médicas, Universidad Católica de Cuyo, San Juan, Argentina.,Laboratorio de Neuropatología Experimental, Facultad de Medicina, Instituto de Biología Celular y Neurociencias "Prof. E. De Robertis" (IBCN), Universidad de Buenos Aires, CONICET, Buenos Aires, Argentina
| | - Antonio W Danilo Gavilanes
- Department of Pediatrics, Maastricht University Medical Center (MUMC), Maastricht, Netherlands.,Facultad de Ciencias Médicas, Instituto de Investigación e Innovación de Salud Integral, Universidad Católica de Santiago de Guayaquil, Guayaquil, Ecuador
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13
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O'Sullivan MP, Looney AM, Moloney GM, Finder M, Hallberg B, Clarke G, Boylan GB, Murray DM. Validation of Altered Umbilical Cord Blood MicroRNA Expression in Neonatal Hypoxic-Ischemic Encephalopathy. JAMA Neurol 2020; 76:333-341. [PMID: 30592487 DOI: 10.1001/jamaneurol.2018.4182] [Citation(s) in RCA: 27] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022]
Abstract
Importance Neonatal hypoxic-ischemic encephalopathy (HIE) remains a significant cause of neurologic disability. Identifying infants suitable for therapeutic hypothermia (TH) within a narrow therapeutic time is difficult. No single robust biochemical marker is available to clinicians. Objective To assess the ability of a panel of candidate microRNA (miRNA) to evaluate the development and severity of encephalopathy following perinatal asphyxia (PA). Design, Setting, and Participants This validation study included 2 cohorts. For the discovery cohort, full-term infants with PA were enrolled at birth to the Biomarkers in Hypoxic-Ischemic Encephalopathy (BiHiVE1) study (2009-2011) in Cork, Ireland. Encephalopathy grade was defined using early electroencephalogram and Sarnat score (n = 68). The BiHiVE1 cohort also enrolled healthy control infants (n = 22). For the validation cohort, the BiHiVE2 multicenter study (2013-2015), based in Cork, Ireland (7500 live births per annum), and Karolinska Huddinge, Sweden (4400 live births per annum), recruited infants with PA along with healthy control infants to validate findings from BiHiVE1 using identical recruitment criteria (n = 80). The experimental design was formulated prior to recruitment, and analysis was conducted from June 2016 to March 2017. Main Outcomes and Measures Alterations in umbilical cord whole-blood miRNA expression. Results From 170 neonates, 160 were included in the final analysis. The BiHiVE1 cohort included 87 infants (21 control infants, 39 infants with PA, and 27 infants with HIE), and BiHiVE2 included 73 infants (control [n = 22], PA [n = 26], and HIE [n = 25]). The BiHiVE1 and BiHiVE2 had a median age of 40 weeks (interquartile range [IQR], 39-41 weeks) and 40 weeks (IQR, 39-41 weeks), respectively, and included 56 boys and 31 girls and 45 boys and 28 girls, respectively. In BiHiVE1, 12 candidate miRNAs were identified, and 7 of these miRNAs were chosen for validation in BiHiVE2. The BiHiVE2 cohort showed consistent alteration of 3 miRNAs; miR-374a-5p was decreased in infants diagnosed as having HIE compared with healthy control infants (median relative quantification, 0.38; IQR, 0.17-0.77 vs 0.95; IQR, 0.68-1.19; P = .009), miR-376c-3p was decreased in infants with PA compared with healthy control infants (median, 0.42; IQR, 0.21-0.61 vs 0.90; IQR, 0.70-1.30; P = .004), and mir-181b-5p was decreased in infants eligible for TH (median, 0.27; IQR, 0.14-1.41) vs 1.18; IQR, 0.70-2.05; P = .02). Conclusions and Relevance Altered miRNA expression was detected in umbilical cord blood of neonates with PA and HIE. These miRNA could assist diagnostic markers for early detection of HIE and PA at birth.
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Affiliation(s)
- Marc Paul O'Sullivan
- The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland.,National Children's Research Centre, Crumlin, Dublin, Ireland
| | - Ann Marie Looney
- The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland
| | - Gerard M Moloney
- Department of Anatomy and Neuroscience, University College Cork, Cork, Ireland
| | - Mikael Finder
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
| | - Boubou Hallberg
- Department of Clinical Science, Intervention and Technology, Karolinska Institutet, and Karolinska University Hospital, Stockholm, Sweden
| | - Gerard Clarke
- The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland.,Department of Psychiatry and Neurobehavioural Science, University College Cork, Cork, Ireland.,APC Microbiome Institute, Cork, Ireland
| | - Geraldine B Boylan
- The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland
| | - Deirdre M Murray
- The Irish Centre for Fetal and Neonatal Translational Research, Cork, Ireland.,Department of Paediatrics and Child Health, University College Cork, Cork, Ireland.,National Children's Research Centre, Crumlin, Dublin, Ireland
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14
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Shen G, Ma Q. MicroRNAs in the Blood-Brain Barrier in Hypoxic-Ischemic Brain Injury. Curr Neuropharmacol 2020; 18:1180-1186. [PMID: 32348227 PMCID: PMC7770646 DOI: 10.2174/1570159x18666200429004242] [Citation(s) in RCA: 16] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/07/2020] [Revised: 03/31/2020] [Accepted: 04/24/2020] [Indexed: 12/29/2022] Open
Abstract
Hypoxic-ischemic (HI) brain injury is a leading cause of acute mortality and chronic disability in newborns. Current evidence shows that cerebral microvascular response and compromised blood-brain barrier (BBB) integrity occur rapidly and could primarily be responsible for the brain injury observed in many infants with HI brain injury. MicroRNAs (miRNAs) are a type of highly conserved non-coding RNAs (ncRNAs), which consist of 21-25 nucleotides in length and usually lead to suppression of target gene expression. Growing evidence has revealed that brainenriched miRNAs act as versatile regulators of BBB dysfunctions in various neurological disorders including neonatal HI brain injury. In the present review, we summarize the current findings regarding the role of miRNAs in BBB impairment after hypoxia/ischemia brain injury. Specifically, we focus on the recent progress of miRNAs in the pathologies of neonatal HI brain injury. These findings can not only deepen our understanding of the role of miRNAs in BBB impairment in HI brain injury, but also provide insight into the development of new therapeutic strategies for preservation of BBB integrity under pathological conditions.
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Affiliation(s)
- Guofang Shen
- Department of Basic Sciences, The Lawrence D. Longo Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, CA92350, USA
| | - Qingyi Ma
- Department of Basic Sciences, The Lawrence D. Longo Center for Perinatal Biology, Loma Linda University School of Medicine, Loma Linda, CA92350, USA
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15
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Rajar P, Åsegg-Atneosen M, Saugstad OD, Solberg R, Baumbusch LO. Quantification of circulating cell-free DNA (cfDNA) in urine using a newborn piglet model of asphyxia. PLoS One 2020; 14:e0227066. [PMID: 31891615 PMCID: PMC6938324 DOI: 10.1371/journal.pone.0227066] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2019] [Accepted: 12/10/2019] [Indexed: 12/03/2022] Open
Abstract
Cell free DNA (cfDNA) in plasma has been described as a potential diagnostic indicator for a variety of clinical conditions, including neonatal hypoxia. Neonatal hypoxia or perinatal asphyxia is a severe medical condition caused by a temporary interruption in oxygen availability during birth. Previously, we have reported temporal changes of cfDNA detected in blood in a newborn piglet model of perinatal asphyxia. However, cfDNA can also be found in other body liquids, opening for a less invasive diagnostic prospective. The objective of this study was to test and establish a reliable method for the isolation and quantification of cfDNA from urine and to explore changes in the quantities of cfDNA using a newborn piglet model of asphyxia. Animals were exposed to hypoxia-reoxygenation (n = 6), hypoxia-reoxygenation + hypothermia (n = 6) or were part of the sham-operated control group (n = 6) and urine samples (n = 18) were collected at 570 minutes post-intervention. Two alternative applications of cfDNA measurement were tested, an indirect method comprising a centrifugation step together with DNA extraction with magnetic beads versus a direct assessment based on two centrifugation steps. CfDNA concentrations were determined by a fluorescent assay using PicoGreen and by qRT-PCR. Genomic (gDNA) and mitochondrial DNA (mtDNA) cfDNA were determined in parallel, taking into account potential differences in the rates of damages caused by oxidative stress. In contrast to previous publications, our results indicate that the direct method is insufficient. Application of the indirect method obtained with the fluorescence assay revealed mean cfDNA levels (SD) of 1.23 (1.76) ng/ml for the hypoxia samples, 4.47 (6.15) ng/ml for the samples exposed to hypoxia + hypothermia and 2.75 (3.62) ng/ml for the control animals. The mean cfDNA levels in piglets exposed to hypoxia + hypothermia revealed significantly higher cfDNA amounts compared to mean cfDNA levels in the samples purely exposed to hypoxia (p < 0.05); however, no significant difference could be determined when compared to the control group (p = 0.09). Application of the indirect method by qRT-PCR revealed mean cfDNA levels of mtDNA and gDNA at the detection limit of the technique and thus no reliable statistics could be performed between the observed cfDNA levels in the investigated groups. The methodology for detection and monitoring of cfDNA in urine has to be further optimized before it can be applied in a clinical setting in the future.
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Affiliation(s)
- Polona Rajar
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Monica Åsegg-Atneosen
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Ola Didrik Saugstad
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Rønnaug Solberg
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,Department of Pediatrics, Vestfold Hospital Trust, Tønsberg, Norway
| | - Lars Oliver Baumbusch
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway
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16
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Forouzanfar F, Shojapour M, Asgharzade S, Amini E. Causes and Consequences of MicroRNA Dysregulation Following Cerebral Ischemia-Reperfusion Injury. CNS & NEUROLOGICAL DISORDERS-DRUG TARGETS 2019; 18:212-221. [DOI: 10.2174/1871527318666190204104629] [Citation(s) in RCA: 10] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/25/2018] [Revised: 12/31/2018] [Accepted: 01/25/2019] [Indexed: 12/31/2022]
Abstract
Stroke continues to be a major cause of death and disability worldwide. In this respect, the
most important mechanisms underlying stroke pathophysiology are inflammatory pathways, oxidative
stress, as well as apoptosis. Accordingly, miRNAs are considered as non-coding endogenous RNA
molecules interacting with their target mRNAs to inhibit mRNA translation or reduce its transcription.
Studies in this domain have similarly shown that miRNAs are strongly associated with coronary artery
disease and correspondingly contributed to the brain ischemia molecular processes. To retrieve articles
related to the study subject, i.e. the role of miRNAs involved in inflammatory pathways, oxidative
stress, and apoptosis in stroke from the databases of Web of Science, PubMed (NLM), Open Access
Journals, LISTA (EBSCO), and Google Scholar; keywords including cerebral ischemia, microRNA
(miRNA), inflammatory pathway, oxidative stress, along with apoptosis were used. It was consequently
inferred that, miRNAs could be employed as potential biomarkers for diagnosis and prognosis, as
well as therapeutic goals of cerebral ischemia.
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Affiliation(s)
- Fatemeh Forouzanfar
- Medical Toxicology Research Center, Faculty of Medicine, Mashhad University of Medical Sciences, Mashhad, Iran
| | - Mana Shojapour
- Molecular and Medicine Research Center, Arak University of Medical Sciences, Arak, Iran
| | - Samira Asgharzade
- Cellular and Molecular Research Center, Basic Health Sciences Institute, Shahrekord University of Medical Sciences, Shahrekord, Iran
| | - Elham Amini
- UKM Medical Centre [HUKM], Department of Medicine, Faculty of Medicine, Malaysia
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17
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Cho KHT, Xu B, Blenkiron C, Fraser M. Emerging Roles of miRNAs in Brain Development and Perinatal Brain Injury. Front Physiol 2019; 10:227. [PMID: 30984006 PMCID: PMC6447777 DOI: 10.3389/fphys.2019.00227] [Citation(s) in RCA: 72] [Impact Index Per Article: 14.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/19/2018] [Accepted: 02/21/2019] [Indexed: 12/14/2022] Open
Abstract
In human beings the immature brain is highly plastic and depending on the stage of gestation is particularly vulnerable to a range of insults that if sufficiently severe, can result in long-term motor, cognitive and behavioral impairment. With improved neonatal care, the incidence of major motor deficits such as cerebral palsy has declined with prematurity. Unfortunately, however, milder forms of injury characterized by diffuse non-cystic white matter lesions within the periventricular region and surrounding white matter, involving loss of oligodendrocyte progenitors and subsequent axonal hypomyelination as the brain matures have not. Existing therapeutic options for treatment of preterm infants have proved inadequate, partly owing to an incomplete understanding of underlying post-injury cellular and molecular changes that lead to poor neurodevelopmental outcomes. This has reinforced the need to improve our understanding of brain plasticity, explore novel solutions for the development of protective strategies, and identify biomarkers. Compelling evidence exists supporting the involvement of microRNAs (miRNAs), a class of small non-coding RNAs, as important post-transcriptional regulators of gene expression with functions including cell fate specification and plasticity of synaptic connections. Importantly, miRNAs are differentially expressed following brain injury, and can be packaged within exosomes/extracellular vesicles, which play a pivotal role in assuring their intercellular communication and passage across the blood-brain barrier. Indeed, an increasing number of investigations have examined the roles of specific miRNAs following injury and regeneration and it is apparent that this field of research could potentially identify protective therapeutic strategies to ameliorate perinatal brain injury. In this review, we discuss the most recent findings of some important miRNAs in relation to the development of the brain, their dysregulation, functions and regulatory roles following brain injury, and discuss how these can be targeted either as biomarkers of injury or neuroprotective agents.
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Affiliation(s)
- Kenta Hyeon Tae Cho
- Department of Physiology, Faculty of Medical Health and Sciences, University of Auckland, Auckland, New Zealand
| | - Bing Xu
- Department of Physiology, Faculty of Medical Health and Sciences, University of Auckland, Auckland, New Zealand
| | - Cherie Blenkiron
- Departments of Molecular Medicine and Pathology, Faculty of Medical Health and Sciences, University of Auckland, Auckland, New Zealand
| | - Mhoyra Fraser
- Department of Physiology, Faculty of Medical Health and Sciences, University of Auckland, Auckland, New Zealand
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18
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Ponnusamy V, Yip PK. The role of microRNAs in newborn brain development and hypoxic ischaemic encephalopathy. Neuropharmacology 2019; 149:55-65. [PMID: 30716413 DOI: 10.1016/j.neuropharm.2018.11.041] [Citation(s) in RCA: 34] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 11/28/2018] [Accepted: 11/30/2018] [Indexed: 02/08/2023]
Abstract
Neonates can develop hypoxic-ischaemic encephalopathy (HIE) due to lack of blood supply or oxygen, resulting in a major cause of death and disability among term newborns. However, current definitive treatment of therapeutic hypothermia, will only benefit one out of nine babies. Furthermore, the mechanisms of HIE and therapeutic hypothermia are not fully understood. Recently, microRNAs (miRNAs) have become of interest to many researchers due to their important role in post-transcriptional control and deep evolutionary history. Despite this, role of miRNAs in newborns with HIE remains largely unknown due to limited research in this field. Therefore, this review aims to understand the role of miRNAs in normal brain development and HIE pathophysiology with reliance on extrapolated data from other diseases, ages and species due to current limited data. This will provide us with an overview of how miRNAs in normal brain development changes after HIE. Furthermore, it will indicate how miRNAs are affected specifically or globally by the various pathophysiological events. In addition, we discuss about how drugs and commercially available agents can specifically target certain miRNAs as a mechanism of action and potential safety issue with off-target effects. Improving our understanding of the role of miRNAs on the cellular response after HIE would enhance the success of effective diagnosis, prognosis, and treatment of newborns with HIE.
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Affiliation(s)
- Vennila Ponnusamy
- Centre of Genomics and Child Health, Blizard Institute, Barts and London School of Medicine and Dentistry, Queen Mary University of London, UK; Neonatal Intensive Care Unit, Ashford and St. Peter's Hospitals NHS Trust, Chertsey, UK.
| | - Ping K Yip
- Center of Neuroscience, Surgery and Trauma, Blizard Institute, Barts and London School of Medicine and Dentistry, Queen Mary University of London, UK.
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19
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Manueldas S, Benterud T, Rueegg CS, Garberg HT, Huun MU, Pankratov L, Åsegg-Atneosen M, Solberg R, Escobar J, Saugstad OD, Baumbusch LO. Temporal patterns of circulating cell-free DNA (cfDNA) in a newborn piglet model of perinatal asphyxia. PLoS One 2018; 13:e0206601. [PMID: 30475817 PMCID: PMC6261042 DOI: 10.1371/journal.pone.0206601] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/15/2018] [Accepted: 10/16/2018] [Indexed: 12/18/2022] Open
Abstract
Perinatal asphyxia is a severe medical condition resulting from oxygen deficiency (hypoxia) at the time of birth, causing worldwide approximately 680,000 newborn deaths every year. Better prediction of severity of damages including early biomarkers is highly demanded. Elevated levels of circulating cell-free DNA (cfDNA) in blood have been reported for a range of different diseases and conditions, including cancer and prematurity. The objective of this study was to validate methods for assessing cfDNA in blood and cerebrospinal fluid (CSF) and to explore temporal variations in a piglet model of neonatal hypoxia-reoxygenation. Different cfDNA extraction methods in combination with cfDNA detection systems were tested, including a fluorescent assay using SYBR Gold and a qRT-PCR-based technique. Newborn piglets (n = 55) were exposed to hypoxia-reoxygenation, hypoxia-reoxygenation and hypothermia, or were part of the sham-operated control group. Blood was sampled at baseline and at post-intervention, further at 30, 270, and 570 minutes after the end of hypoxia. Applying the fluorescent method, cfDNA concentration in piglets exposed to hypoxia (n = 32) increased from 36.8±27.6 ng/ml prior to hypoxia to a peak level of 61.5±54.9 ng/ml after the intervention and deceased to 32.3±19.1 ng/ml at 570 minutes of reoxygenation, whereas the group of sham-operated control animals (n = 11) revealed a balanced cfDNA profile. Animals exposed to hypoxia and additionally treated with hypothermia (n = 12) expressed a cfDNA concentration of 54.4±16.9 ng/ml at baseline, 39.2±26.9 ng/ml at the end of hypoxia, and of 41.1±34.2 ng/ml at 570 minutes post-intervention. Concentrations of cfDNA in the CSF of piglets exposed to hypoxia revealed at post-intervention higher levels in comparison to the controls. However, these observations were only tendencies and not significant. In a first methodological proof-of-principle study exploring cfDNA using a piglet model of hypoxia-reoxygenation variations in the temporal patterns suggest that cfDNA might be an early indicator for damages caused by perinatal asphyxia.
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Affiliation(s)
- Sophia Manueldas
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Torkil Benterud
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Corina Silvia Rueegg
- Oslo Centre for Biostatistics and Epidemiology, Department of Biostatistics, Institute of Basic Medical Sciences, University of Oslo, Oslo, Norway
| | - Håvard Tetlie Garberg
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Marianne Ullestad Huun
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Leonid Pankratov
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Monica Åsegg-Atneosen
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Rønnaug Solberg
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,Department of Pediatrics, Vestfold Hospital Trust, Tønsberg, Norway
| | - Javier Escobar
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway
| | - Ola Didrik Saugstad
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway.,University of Oslo, Oslo, Norway
| | - Lars Oliver Baumbusch
- Department of Pediatric Research, Division of Pediatric and Adolescent Medicine, Oslo University Hospital Rikshospitalet, Oslo, Norway
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20
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Looney AM, O'Sullivan MP, Ahearne CE, Finder M, Felderhoff-Mueser U, Boylan GB, Hallberg B, Murray DM. Altered Expression of Umbilical Cord Blood Levels of miR-181b and Its Downstream Target mUCH-L1 in Infants with Moderate and Severe Neonatal Hypoxic-Ischaemic Encephalopathy. Mol Neurobiol 2018; 56:3657-3663. [PMID: 30178296 DOI: 10.1007/s12035-018-1321-4] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/09/2018] [Accepted: 08/15/2018] [Indexed: 01/22/2023]
Abstract
Hypoxic-ischaemic encephalopathy (HIE) remains one of the leading causes of neurological disability worldwide. No blood biomarker capable of early detection and classification of injury severity in HIE has been identified. This study aimed to investigate the potential of miRNA-181b (miR-181b) and its downstream target, ubiquitin C-terminal hydrolase-L1 (UCH-L1), to predict the severity of HIE. Full-term infants with perinatal asphyxia were recruited at birth and observed for the development of HIE, along with healthy controls. Levels of miR-181b and messenger UCH-L1 (mUCH-L1) in umbilical cord blood were determined using qRT-PCR. In total, 131 infants; 40 control, 50 perinatal asphyxia without HIE (PA) and 41 HIE, recruited across two separate cohorts (discovery and validation) were included in this study. Significant and consistent downregulation of miR-181b was observed in infants with moderate/severe HIE compared to all other groups in both cohorts: discovery 0.25 (0.16-0.32) vs 0.61 (0.26-1.39), p = 0.027 and validation 0.33 (0.15-1.78) vs 1.2 (0.071-2.09), p = 0.035. mUCH-L1 showed increased expression in infants with HIE in both cohorts. The expression ratio of miR-181b to mUCH-L1 was reduced in those infants with moderate/severe HIE in both cohorts: discovery cohort 0.23 (0.06-0.44) vs 1.59 (0.46-2.54), p = 0.01 and validation cohort 0.41 (0.10-0.81) vs 1.38 (0.59-2.56) in all other infants, p = 0.009. We have validated consistent patterns of altered expression in miR-181b/mUCH-L1 in moderate/severe neonatal HIE which may have the potential to guide therapeutic intervention in HIE.
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Affiliation(s)
- A M Looney
- Department of Paediatrics and Child Health, University College Cork, Cork, Ireland.,INFANT Centre, University College Cork, Cork, Ireland
| | - M P O'Sullivan
- Department of Paediatrics and Child Health, University College Cork, Cork, Ireland.,INFANT Centre, University College Cork, Cork, Ireland
| | - C E Ahearne
- Department of Paediatrics and Child Health, University College Cork, Cork, Ireland.,INFANT Centre, University College Cork, Cork, Ireland
| | - M Finder
- Pediatric Department, CLINTEC, Karolinska Institutet and Neonatal Department, Karolinska University Hospital, Stockholm, Sweden
| | - U Felderhoff-Mueser
- Department of Pediatrics/Neonatology, University Hospital Essen, University Duisburg-Essen, Essen, Germany
| | - G B Boylan
- Department of Paediatrics and Child Health, University College Cork, Cork, Ireland.,INFANT Centre, University College Cork, Cork, Ireland
| | - B Hallberg
- Pediatric Department, CLINTEC, Karolinska Institutet and Neonatal Department, Karolinska University Hospital, Stockholm, Sweden
| | - Deirdre M Murray
- Department of Paediatrics and Child Health, University College Cork, Cork, Ireland. .,INFANT Centre, University College Cork, Cork, Ireland.
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Sun ZZ, Lv ZY, Tian WJ, Yang Y. MicroRNA-132 protects hippocampal neurons against oxygen-glucose deprivation-induced apoptosis. Int J Immunopathol Pharmacol 2017. [PMID: 28627974 PMCID: PMC5815264 DOI: 10.1177/0394632017715837] [Citation(s) in RCA: 16] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/16/2022] Open
Abstract
Hypoxic-ischemic brain injury (HIBI) results in death or long-term neurologic impairment in both adults and children. In this study, we investigated the effects of microRNA-132 (miR-132) dysregulation on oxygen-glucose deprivation (OGD)-induced apoptosis in fetal rat hippocampal neurons, in order to reveal the therapeutic potential of miR-132 on HIBI. MiR-132 dysregulation was induced prior to OGD exposure by transfection of primary fetal rat hippocampal neurons with miR-132 mimic or miR-132 inhibitor. The effects of miR-132 overexpression and suppression on OGD-stimulated hippocampal neurons were evaluated by detection of cell viability, apoptotic cells rate, and the expression of apoptosis-related proteins. Besides, TargetScan database and dual luciferase activity assay were used to seek a target gene of miR-132. As a result, miR-132 was highly expressed in hippocampal neurons following 2 h of OGD exposure. MiR-132 overexpression significantly increased OGD-diminished cell viability and reduced OGD-induced apoptosis at 12, 24, and 48 h post-OGD. MiR-132 overexpression significantly down-regulated the expressions of Bax, cytochrome c, and caspase-9, but up-regulated BCl-2. Caspase-3 activity was also significantly decreased by miR-132 overexpression. Furthermore, FOXO3 was a direct target of miR-132, and it was negatively regulated by miR-132. To conclude, our results provide evidence that miR-132 protects hippocampal neurons against OGD injury by inhibiting apoptosis.
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Affiliation(s)
- Zu-Zhen Sun
- Department of Neurology, Affiliated Hospital of Jining Medical University, Jining, China
| | - Zhan-Yun Lv
- Department of Neurology, Affiliated Hospital of Jining Medical University, Jining, China
| | - Wen-Jing Tian
- Department of Neurology, Affiliated Hospital of Jining Medical University, Jining, China
| | - Yan Yang
- Department of Neurology, Affiliated Hospital of Jining Medical University, Jining, China
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