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Tang L, Kebaya LMN, Altamimi T, Kowalczyk A, Musabi M, Roychaudhuri S, Vahidi H, Meyerink P, de Ribaupierre S, Bhattacharya S, de Moraes LTAR, St Lawrence K, Duerden EG. Altered resting-state functional connectivity in newborns with hypoxic ischemic encephalopathy assessed using high-density functional near-infrared spectroscopy. Sci Rep 2024; 14:3176. [PMID: 38326455 PMCID: PMC10850364 DOI: 10.1038/s41598-024-53256-0] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/06/2023] [Accepted: 01/30/2024] [Indexed: 02/09/2024] Open
Abstract
Hypoxic-ischemic encephalopathy (HIE) results from a lack of oxygen to the brain during the perinatal period. HIE can lead to mortality and various acute and long-term morbidities. Improved bedside monitoring methods are needed to identify biomarkers of brain health. Functional near-infrared spectroscopy (fNIRS) can assess resting-state functional connectivity (RSFC) at the bedside. We acquired resting-state fNIRS data from 21 neonates with HIE (postmenstrual age [PMA] = 39.96), in 19 neonates the scans were acquired post-therapeutic hypothermia (TH), and from 20 term-born healthy newborns (PMA = 39.93). Twelve HIE neonates also underwent resting-state functional magnetic resonance imaging (fMRI) post-TH. RSFC was calculated as correlation coefficients amongst the time courses for fNIRS and fMRI data, respectively. The fNIRS and fMRI RSFC maps were comparable. RSFC patterns were then measured with graph theory metrics and compared between HIE infants and healthy controls. HIE newborns showed significantly increased clustering coefficients, network efficiency and modularity compared to controls. Using a support vector machine algorithm, RSFC features demonstrated good performance in classifying the HIE and healthy newborns in separate groups. Our results indicate the utility of fNIRS-connectivity patterns as potential biomarkers for HIE and fNIRS as a new bedside tool for newborns with HIE.
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Affiliation(s)
- Lingkai Tang
- Biomedical Engineering, Faculty of Engineering, Western University, London, ON, Canada
| | - Lilian M N Kebaya
- Neuroscience, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
- Neonatal-Perinatal Medicine, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
- Department of Paediatrics, Division of Neonatal-Perinatal Medicine, Temerty Faculty of Medicine, University of Toronto, Toronto, ON, Canada
| | - Talal Altamimi
- Neonatal-Perinatal Medicine, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | - Alexandra Kowalczyk
- Neonatal-Perinatal Medicine, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | - Melab Musabi
- Neonatal-Perinatal Medicine, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | - Sriya Roychaudhuri
- Neonatal-Perinatal Medicine, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | - Homa Vahidi
- Neuroscience, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | - Paige Meyerink
- Neonatal-Perinatal Medicine, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | - Sandrine de Ribaupierre
- Neuroscience, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
- Clinical Neurological Sciences, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | - Soume Bhattacharya
- Neonatal-Perinatal Medicine, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | | | - Keith St Lawrence
- Biomedical Engineering, Faculty of Engineering, Western University, London, ON, Canada
- Medical Biophysics, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada
| | - Emma G Duerden
- Biomedical Engineering, Faculty of Engineering, Western University, London, ON, Canada.
- Neuroscience, Schulich Faculty of Medicine and Dentistry, Western University, London, ON, Canada.
- Applied Psychology, Faculty of Education, Western University, 1137 Western Rd, London, ON, N6G 1G7, Canada.
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Ali S, Altamimi T, Annink K, Bartmann P, Beato N, Belker K, Ben-David D, Benders M, Bhattacharya S, Anbu Chakkarapani A, Anbu Chakkarapani A, Charbonneau L, Cherkerzian S, Chowdhury RA, Christou H, de Ribaupierre D, Dehaes M, Domogalla C, Duerden EG, El-Dib M, Elanbari M, Elshibiny H, Engel C, Felderhoff U, Flemmer AW, Franceschini MA, Franz A, Garvey A, Groenendaal F, Gupta S, Hannon K, Hellström-Westas L, Herber-Jonat S, Holz S, Hüning B, Inder T, Jamil A, Jilson T, Kebaya LMN, Keller M, Khalifa AKM, Kim SH, Kittel J, Koch L, Kowalczyk A, Kühr J, St Lawrence K, Lee S, Marandyuk B, Marlow N, Mayorga PC, Meyer R, Meyerink P, Miró J, More K, Munk A, Munster C, Musabi M, Nuyt AM, Peters J, Plum A, Poirier N, Pöschl J, Raboisson MJ, Robinson J, Roychaudhuri S, Rüdiger M, Sarközy G, Saugstad OD, Segerer H, Soni N, Stein A, Steins-Rang C, Sunwoo J, Szakmar E, Tang L, Taskin E, Vahidi H, Waldherr S, Wieg C, Winkler S, Wu R, Yajamanyam PK, Yapicioglu-Yildizdas H. Proceedings of the 14th International Newborn Brain Conference: Other forms of brain monitoring, such as NIRS, fMRI, biochemical, etc. J Neonatal Perinatal Med 2023; 16:S63-S73. [PMID: 37599543 DOI: 10.3233/npm-239004] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 08/22/2023]
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Vahidi H, Rens G, Sorger B, Culham JC. Using Functional Near-Infrared Spectroscopy for the Study of Visually Guided Hand Actions. J Vis 2021. [DOI: 10.1167/jov.21.9.2958] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/24/2022] Open
Affiliation(s)
| | - Guy Rens
- University of Western Ontario, Canada
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Jenab Y, Shirani S, Alemzadeh-Ansari M, Vahidi H, Pourjafari M, Jalali A. P3501Association between elevated baseline blood urea nitrogen and mortality in patients with acute pulmonary embolism. Eur Heart J 2017. [DOI: 10.1093/eurheartj/ehx504.p3501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/12/2022] Open
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Ranjbar SH, Vahidi H, Taslimi S, Karimi N, Larijani B, Abdollahi M. A Systematic Review on the Efficacy of Herbal Medicines in the Management of Human Drug-induced Hyperprolactinemia; Potential Sources for the Development of Novel Drugs. INT J PHARMACOL 2010. [DOI: 10.3923/ijp.2010.691.695] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/15/2022]
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Vahidi H, Berry D, Harvey L. MTT test (cytotoxicity test) as a tool for identircation of bioactive compounds with TNF inhibitory effect from microbial source. Toxicol Lett 1998. [DOI: 10.1016/s0378-4274(98)80637-1] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/18/2022]
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Magnuson NS, Beck T, Vahidi H, Hahn H, Smola U, Rapp UR. The Raf-1 serine/threonine protein kinase. Semin Cancer Biol 1994; 5:247-53. [PMID: 7803760] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/27/2023]
Abstract
Raf-1 belongs to a family of serine/threonine protein kinases which are highly conserved through evolution in multicellular organisms. Raf-1 kinase has gained much attention due to its function as a critical shuttle enzyme that connects stimulation of growth factor receptors and protein kinase C at the cell membrane to changes in the expression of genes involved in the control of cell growth, differentiation and survival. Regulation of Raf-1 activity is complex and involves Ras, as well as several serine/threonine and tyrosine kinases. Through a series of phosphorylation events, extracellular signals are connected through the Raf-1/MAP kinase pathway to activity-regulation of several oncogene-class transcription factors via phosphorylation of specific serine residues. Under ordinary circumstances, the cascade involving Raf-1 eventually leads to changes in gene expression and protein synthesis. Upon constitutive activation of Raf-1 kinase, as a result of genetic changes, a variety of cell types acquire a transformed phenotype.
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Affiliation(s)
- N S Magnuson
- Department of Microbiology, Washington State University, Pullman 99164-4233
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Kolch W, Heidecker G, Kochs G, Hummel R, Vahidi H, Mischak H, Finkenzeller G, Marmé D, Rapp UR. Protein kinase C alpha activates RAF-1 by direct phosphorylation. Nature 1993; 364:249-52. [PMID: 8321321 DOI: 10.1038/364249a0] [Citation(s) in RCA: 976] [Impact Index Per Article: 31.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/29/2023]
Abstract
The kinase Raf-1 can be activated by treatment of cells with mitogens and by the protein kinase C (PKC) activator 12-O-tetradecanoyl-phorbol-13-acetate (TPA) (reviewed in refs 1,2). Activated Raf-1 triggers a protein kinase cascade by direct phosphorylation of MAP kinase kinase, resulting in phosphorylation of ternary complex factor and Jun by MAP kinase. Here we investigate the molecular mechanism and biological consequences of PKC alpha-mediated Raf-1 activation in NIH3T3 fibroblasts. PKC alpha directly phosphorylates and activates Raf-1 both in vitro and in vivo. PKC alpha induces Raf-1 phosphorylation at several sites, including a serine residue at position 499. Mutation of serine at this position or at residue 259 does not abrogate Raf-1 stimulation by a combination of Ras plus the src tyrosine kinase Lck, but severely impedes Raf-1 activation by PKC alpha. Consistent with such a direct interaction is the observation that Raf-1 and PKC alpha cooperate in the transformation of NIH3T3 cells. The Ser499 phosphorylation site is necessary for this synergism.
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Affiliation(s)
- W Kolch
- Biological Research, Goedecke AG, Freiburg, Germany
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Vahidi H, Purac A, LeBlanc JM, Honda BM. Characterization of potentially functional 5S rRNA-encoding genes within ribosomal DNA repeats of the nematode Meloidogyne arenaria. Gene 1991; 108:281-4. [PMID: 1748312 DOI: 10.1016/0378-1119(91)90446-i] [Citation(s) in RCA: 16] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Abstract
In the plant-parasitic nematode Meloidogyne arenaria, isolated rDNA repeats show length heterogeneity, and are unusual in that they contain putative 5S ribosomal RNA pseudogenes [Vahidi et al., J. Mol. Evol. 27 (1988) 222-227]. Potentially functional 5S rRNA-encoding genes can also be identified in various rDNA repeats, which appear to be tandemly organized in the genome.
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Affiliation(s)
- H Vahidi
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
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Abstract
Ribosomal DNA (rDNA) repeats of the plant-parasitic nematode Meloidogyne arenaria are heterogeneous in size and appear to contain 5S rRNA gene sequences. Moreover, in a recA+ bacterial host, plasmid clones of a 9 kb rDNA repeat show deletion events within a 2 kb intergenic spacer (IGS), between 28S and 5S DNA sequences. These deletions appear to result from a reduction in the number of tandem 129 bp repeats in the IGS. The loss of such repeats might explain how rDNA length heterogeneity, observed in the Meloidogyne genome, could have arisen. Each 129 bp repeat also contains three copies of an 8 bp subrepeat, which has sequence similarity to an element found in the IGS repeats of some plant rDNAs.
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Affiliation(s)
- H Vahidi
- Dept. of Biological Sciences, Simon Fraser University, Burnaby, B.C., Canada
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Vahidi H, Curran J, Nelson DW, Webster JM, McClure MA, Honda BM. Unusual sequences, homologous to 5S RNA, in ribosomal DNA repeats of the nematode Meloidogyne arenaria. J Mol Evol 1988; 27:222-7. [PMID: 3138424 DOI: 10.1007/bf02100078] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/04/2023]
Abstract
There are sequences homologous to 5S ribosomal RNA in the ribosomal DNA (rDNA) repeats of the plant-parasitic nematode Meloidogyne arenaria. This is surprising, because in all other higher eukaryotes studied to date, the genes for 5S RNA are unlinked to and distinct from a tandem rDNA repeat containing the genes for 18S, 5.8S, and 28S ribosomal RNA. Previously, only prokaryotes and certain "lower eukaryotes" (protozoa and fungi) had been found to have both the larger rRNAs and 5S rRNA represented within a single DNA repeat. This has raised questions on the organization of these repeats in the earliest cell (progenote), and on subsequent evolutionary relationships between pro- and eukaryotes. Evidence is presented for rearrangements and deletions within Meloidogyne rDNA. The unusual life cycles (different levels of ploidy, reproduction by meiotic and mitotic parthenogenesis) of members of this genus might allow rapid fixation of any variants with introduced 5S RNA sequences. The 5S RNA sequences in Meloidogyne rDNA may not be expressed, but their presence raises important questions as to the evolutionary origins and stability of repeat gene families.
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Affiliation(s)
- H Vahidi
- Department of Biological Sciences, Simon Fraser University, Burnaby, British Columbia, Canada
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