| Brainstem deficiency of the 14-3-3 regulator of serotonin synthesis: a proteomics analysis in the sudden infant death syndrome. | |
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MedLine Citation:
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PMID: 21976671 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Impaired brainstem responses to homeostatic challenges during sleep may result in the sudden infant death syndrome (SIDS). Previously we reported a deficiency of serotonin (5-HT) and its key biosynthetic enzyme, tryptophan hydroxylase (TPH2), in SIDS infants in the medullary 5-HT system that modulates homeostatic responses during sleep. Yet, the underlying basis of the TPH2 and 5-HT deficiency is unknown. In this study, we tested the hypothesis that proteomics would uncover previously unrecognized abnormal levels of proteins related to TPH2 and 5-HT regulation in SIDS cases compared with controls, which could provide novel insight into the basis of their deficiency. We first performed a discovery proteomic analysis of the gigantocellularis of the medullary 5-HT system in the same data set with deficiencies of TPH2 and 5-HT levels. Analysis in 6 SIDS cases and 4 controls revealed a 42-75% reduction in abundance in 5 of the 6 isoforms identified of the 14-3-3 signal transduction family, which is known to influence TPH2 activity (p < 0.07). These findings were corroborated in an additional SIDS and control sample using an orthogonal MS(E)-based quantitative proteomic strategy. To confirm these proteomics results in a larger data set (38 SIDS, 11 controls), we applied Western blot analysis in the gigantocellularis and found that 4/7 14-3-3 isoforms identified were significantly reduced in SIDS cases (p ≤ 0.02), with a 43% reduction in all 14-3-3 isoforms combined (p < 0.001). Abnormalities in 5-HT and TPH2 levels and 5-HT(1A) receptor binding were associated with the 14-3-3 deficits in the same SIDS cases. These data suggest a potential molecular defect in SIDS related to TPH2 regulation, as 14-3-3 is critical in this process. |
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Authors:
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Kevin G Broadbelt; Keith D Rivera; David S Paterson; Jhodie R Duncan; Felicia L Trachtenberg; Joao A Paulo; Martha D Stapels; Natalia S Borenstein; Richard A Belliveau; Elisabeth A Haas; Christina Stanley; Henry F Krous; Hanno Steen; Hannah C Kinney |
Publication Detail:
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Type: Journal Article; Research Support, N.I.H., Extramural; Research Support, Non-U.S. Gov't Date: 2011-10-05 |
Journal Detail:
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Title: Molecular & cellular proteomics : MCP Volume: 11 ISSN: 1535-9484 ISO Abbreviation: Mol. Cell Proteomics Publication Date: 2012 Jan |
Date Detail:
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Created Date: 2012-01-12 Completed Date: 2012-05-01 Revised Date: 2013-02-20 |
Medline Journal Info:
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Nlm Unique ID: 101125647 Medline TA: Mol Cell Proteomics Country: United States |
Other Details:
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Languages: eng Pagination: M111.009530 Citation Subset: IM |
Affiliation:
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Department of Pathology, Children's Hospital Boston and Harvard Medical School, Boston, Massachusetts 02115, USA. kevin.broadbelt@childrens.harvard.edu |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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14-3-3 Proteins
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deficiency* Brain Stem / metabolism* Chromatography, Liquid Female Humans Infant Infant, Newborn Male Mass Spectrometry Proteomics Serotonin / deficiency* Sudden Infant Death* Tryptophan Hydroxylase / deficiency* |
| Grant Support | |
ID/Acronym/Agency:
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5 U01 HD045991-06/HD/NICHD NIH HHS; P01 HD036379-11/HD/NICHD NIH HHS; P01-HD036379/HD/NICHD NIH HHS; P30 HD018655-20/HD/NICHD NIH HHS; P30-HD18655/HD/NICHD NIH HHS; R01 HD020991/HD/NICHD NIH HHS; R01-HD020991-24/HD/NICHD NIH HHS; R37 HD020991-14/HD/NICHD NIH HHS; R37-HD20991/HD/NICHD NIH HHS; U01 HD045991-06/HD/NICHD NIH HHS |
| Chemical | |
Reg. No./Substance:
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0/14-3-3 Proteins; 50-67-9/Serotonin; EC 1.14.16.4/Tryptophan Hydroxylase |
| Comments/Corrections | |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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