| Selectively diminished corpus callosum fibers in congenital central hypoventilation syndrome. | |
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MedLine Citation:
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PMID: 21256194 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Congenital central hypoventilation syndrome (CCHS), a condition associated with mutations in the PHOX2B gene, is characterized by loss of breathing drive during sleep, insensitivity to CO2 and O2, and multiple somatomotor, autonomic, neuropsychological, and ophthalmologic deficits, including impaired intrinsic and extrinsic eye muscle control. Brain structural studies show injury in peri-callosal regions and the corpus callosum (CC), which has the potential to affect functions disturbed in the syndrome; however, the extent of CC injury in CCHS is unclear. Diffusion tensor imaging (DTI)-based fiber tractography procedures display fiber directional information and allow quantification of fiber integrity. We performed DTI in 13 CCHS children (age, 18.2±4.7 years; eight male) and 31 control (17.4±4.9 years; 18 male) subjects using a 3.0-Tesla magnetic resonance imaging scanner; CC fibers were assessed globally and regionally with tractography procedures, and fiber counts and densities compared between groups using analysis-of-covariance (covariates; age and sex). Global CC evaluation showed reduced fiber counts and densities in CCHS over control subjects (CCHS vs. controls; fiber-counts, 4490±854 vs. 5232±777, P<0.001; fiber-density, 10.0±1.5 vs. 10.8±0.9 fibers/mm2, P<0.020), and regional examination revealed that these changes are localized to callosal axons projecting to prefrontal (217±47 vs. 248±32, P<0.005), premotor (201±51 vs. 241±47, P<0.012), parietal (179±64 vs. 238±54, P<0.002), and occipital regions (363±46 vs. 431±82, P<0.004). Corpus callosum fibers in CCHS are compromised in motor, cognitive, speech, and ophthalmologic regulatory areas. The mechanisms of fiber injury are unclear, but may result from hypoxia or perfusion deficits accompanying the syndrome, or from consequences of PHOX2B action. |
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Authors:
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R Kumar; P M Macey; M A Woo; R M Harper |
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Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural Date: 2011-01-19 |
Journal Detail:
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Title: Neuroscience Volume: 178 ISSN: 1873-7544 ISO Abbreviation: Neuroscience Publication Date: 2011 Mar |
Date Detail:
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Created Date: 2011-03-03 Completed Date: 2011-06-27 Revised Date: 2012-04-04 |
Medline Journal Info:
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Nlm Unique ID: 7605074 Medline TA: Neuroscience Country: United States |
Other Details:
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Languages: eng Pagination: 261-9 Citation Subset: IM |
Copyright Information:
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Copyright © 2011 IBRO. Published by Elsevier Ltd. All rights reserved. |
Affiliation:
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Department of Neurobiology, David Geffen School of Medicine at UCLA, University of California at Los Angeles, Los Angeles, CA 90095-1763, USA. |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Adolescent Atrophy / pathology Brain Mapping / methods Case-Control Studies Child Corpus Callosum / pathology* Diffusion Tensor Imaging / methods Female Humans Hypoventilation / congenital, pathology Magnetic Resonance Imaging / methods Male Nerve Fibers, Myelinated / pathology* Neural Pathways / pathology Reproducibility of Results Sleep Apnea, Central / pathology Young Adult |
| Grant Support | |
ID/Acronym/Agency:
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R01 HD-22695/HD/NICHD NIH HHS; R01 HD022695-20/HD/NICHD NIH HHS |
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