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Koning G, Leverin AL, Nair S, Schwendimann L, Ek J, Carlsson Y, Gressens P, Thornton C, Wang X, Mallard C, Hagberg H. Magnesium induces preconditioning of the neonatal brain via profound mitochondrial protection. J Cereb Blood Flow Metab 2019; 39:1038-1055. [PMID: 29206066 PMCID: PMC6547197 DOI: 10.1177/0271678x17746132] [Citation(s) in RCA: 37] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 12/11/2022]
Abstract
Magnesium sulphate (MgSO4) given to women in preterm labor reduces cerebral palsy in their offspring but the mechanism behind this protection is unclear, limiting its effective, safe clinical implementation. Previous studies suggest that MgSO4 is not neuroprotective if administered during or after the insult, so we hypothesised that MgSO4 induces preconditioning in the immature brain. Therefore, we administered MgSO4 at various time-points before/after unilateral hypoxia-ischemia (HI) in seven-day-old rats. We found that MgSO4 treatment administered as a bolus between 6 days and 12 h prior to HI markedly reduced the brain injury, with maximal protection achieved by 1.1 mg/g MgSO4 administered 24 h before HI. As serum magnesium levels returned to baseline before the induction of HI, we ascribed this reduction in brain injury to preconditioning. Cerebral blood flow was unaffected, but mRNAs/miRNAs involved in mitochondrial function and metabolism were modulated by MgSO4. Metabolomic analysis (H+-NMR) disclosed that MgSO4 attenuated HI-induced increases in succinate and prevented depletion of high-energy phosphates. MgSO4 pretreatment preserved mitochondrial respiration, reducing ROS production and inflammation after HI. Therefore, we propose that MgSO4 evokes preconditioning via induction of mitochondrial resistance and attenuation of inflammation.
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Affiliation(s)
- Gabriella Koning
- 1 Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Anna-Lena Leverin
- 1 Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Syam Nair
- 1 Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Leslie Schwendimann
- 2 PROTECT, INSERM, Université Paris Diderot, Sorbonne Paris Cité, Paris, France
| | - Joakim Ek
- 1 Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Ylva Carlsson
- 3 Perinatal Center, Department of Clinical Sciences, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Pierre Gressens
- 2 PROTECT, INSERM, Université Paris Diderot, Sorbonne Paris Cité, Paris, France.,4 Centre for the Developing Brain, Department of Perinatal Imaging and Health, King's College London, London, UK
| | - Claire Thornton
- 4 Centre for the Developing Brain, Department of Perinatal Imaging and Health, King's College London, London, UK
| | - Xiaoyang Wang
- 1 Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Carina Mallard
- 1 Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden
| | - Henrik Hagberg
- 1 Perinatal Center, Institute of Neuroscience and Physiology, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden.,3 Perinatal Center, Department of Clinical Sciences, Sahlgrenska Academy, Gothenburg University, Gothenburg, Sweden.,4 Centre for the Developing Brain, Department of Perinatal Imaging and Health, King's College London, London, UK
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Jalilvand A, Akbari B, Zare Mirakabad F. S-FLN: A sequence-based hierarchical approach for functional linkage network construction. J Theor Biol 2018; 437:149-162. [PMID: 29080781 DOI: 10.1016/j.jtbi.2017.10.021] [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: 12/31/2016] [Revised: 07/27/2017] [Accepted: 10/18/2017] [Indexed: 11/24/2022]
Abstract
The functional linkage network (FLN) construction is a primary and important step in drug discovery and disease gene prioritization methods. In order to construct FLN, several methods have been introduced based on integration of various biological data. Although, there are impressive ideas behind these methods, they suffer from low quality of the biological data. In this paper, a hierarchical sequence-based approach is proposed to construct FLN. The proposed approach, denoted as S-FLN (Sequence-based Functional Linkage Network), uses the sequence of proteins as the primary data in three main steps. Firstly, the physicochemical properties of amino-acids are employed to describe the functionality of proteins. As the sequence of proteins is a more comprehensive and accurate primary data, more reliable relations are achieved. Secondly, seven different descriptor methods are used to extract feature vectors from the proteins sequences. Advantage of different descriptor methods lead to obtain diverse ensemble learners in the next step. Finally, a two-layer ensemble learning structure is proposed to calculated the score of protein pairs. The proposed approach has been evaluated using two biological datasets, S.Cerevisiae and H.Pylori, and resulted in 93.9% and 91.15% precision rates, respectively. The results of various experiments indicate the efficiency and validity of the proposed approach.
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Affiliation(s)
- A Jalilvand
- Department of Electronic and computer engineering,Tarbiat Modares University, Tehran, Iran
| | - B Akbari
- Department of Electronic and computer engineering,Tarbiat Modares University, Tehran, Iran.
| | - F Zare Mirakabad
- Department of Mathematics and Computer Science, Amirkabir University of Technology, Tehran, Iran
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Khungwanmaythawee K, Sornjai W, Paemanee A, Jaratsittisin J, Fucharoen S, Svasti S, Lithanatudom P, Roytrakul S, Smith DR. Mitochondrial Changes in β0-Thalassemia/Hb E Disease. PLoS One 2016; 11:e0153831. [PMID: 27092778 PMCID: PMC4836671 DOI: 10.1371/journal.pone.0153831] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/25/2015] [Accepted: 04/03/2016] [Indexed: 11/18/2022] Open
Abstract
The compound β°-thalassemia/Hb E hemoglobinopathy is characterized by an unusually large range of presentation from essentially asymptomatic to a severe transfusion dependent state. While a number of factors are known that moderate presentation, these factors do not account for the full spectrum of presentation. Mitochondria are subcellular organelles that are pivotal in a number of cellular processes including oxidative phosphorylation and apoptosis. A mitochondrial protein enriched proteome was determined and validated from erythroblasts from normal controls and β°-thalassemia/Hb E patients of different severities. Mitochondria were evaluated through the use of mitotracker staining, analysis of relative mitochondrial genome number and evaluation of mitochondrial gene expression in addition to assay of overall cellular redox status through the use of alamarBlue assays. Fifty differentially regulated mitochondrial proteins were identified. Mitotracker staining revealed significant differences in staining between normal control erythroblasts and those from β°-thalassemia/Hb E patients. Differences in relative mitochondria number and gene expression were seen primarily in day 10 cells. Significant differences were seen in redox status as evaluated by alamarBlue staining in newly isolated CD34+ cells. Mitochondria mediate oxidative phosphorylation and apoptosis, both of which are known to be dysregulated in differentiating erythrocytes from β°-thalassemia/Hb E patients. The evidence presented here suggest that there are inherent differences in these cells as early as the erythroid progenitor cell stage, and that maximum deficit is seen coincident with high levels of globin gene expression.
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Affiliation(s)
- Kornpat Khungwanmaythawee
- Institute of Molecular Biosciences, Mahidol University, Salaya campus, 25/25 Phuttamontol Sai 4, Salaya, Nakorn Pathom, 73170, Thailand
| | - Wannapa Sornjai
- Institute of Molecular Biosciences, Mahidol University, Salaya campus, 25/25 Phuttamontol Sai 4, Salaya, Nakorn Pathom, 73170, Thailand
| | - Atchara Paemanee
- Institute of Molecular Biosciences, Mahidol University, Salaya campus, 25/25 Phuttamontol Sai 4, Salaya, Nakorn Pathom, 73170, Thailand
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Janejira Jaratsittisin
- Institute of Molecular Biosciences, Mahidol University, Salaya campus, 25/25 Phuttamontol Sai 4, Salaya, Nakorn Pathom, 73170, Thailand
| | - Suthat Fucharoen
- Institute of Molecular Biosciences, Mahidol University, Salaya campus, 25/25 Phuttamontol Sai 4, Salaya, Nakorn Pathom, 73170, Thailand
| | - Saovaros Svasti
- Institute of Molecular Biosciences, Mahidol University, Salaya campus, 25/25 Phuttamontol Sai 4, Salaya, Nakorn Pathom, 73170, Thailand
| | - Pathrapol Lithanatudom
- Department of Biology, Faculty of Science, Chiang Mai University, 239 Huay Kaew Rd., Suthep, Muang, Chiang Mai, 50202, Thailand
| | - Sittiruk Roytrakul
- National Center for Genetic Engineering and Biotechnology (BIOTEC), National Science and Technology Development Agency, 113 Thailand Science Park, Phahonyothin Road, Khlong Nueng, Khlong Luang, Pathum Thani, 12120, Thailand
| | - Duncan R. Smith
- Institute of Molecular Biosciences, Mahidol University, Salaya campus, 25/25 Phuttamontol Sai 4, Salaya, Nakorn Pathom, 73170, Thailand
- * E-mail: ;
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