Source:http://linkedlifedata.com/resource/pubmed/id/18852674
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| Predicate | Object |
|---|---|
| rdf:type | |
| lifeskim:mentions | |
| pubmed:issue |
2
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| pubmed:dateCreated |
2009-1-26
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| pubmed:abstractText |
Loeys-Dietz syndrome (LDS) is an autosomal dominant connective tissue disorder resulting from genetic mutations in the transforming growth factor beta receptors 1 and 2 (TGFBR1 and TGFBR2). The syndrome is characterized phenotypically by hypertelorism, bifid uvula, and/or cleft palate, and arterial tortuosity with aneurysms and dissections. LDS has a much more rapid clinical course than Marfan syndrome (MFS) and thus those diagnosed with LDS are currently being recommended for prophylactic aortic root replacement at younger ages and with smaller aortic dimensions. Aortic root tissue obtained at surgery was compared between 15 patients carrying a diagnosis of LDS, 11 patients with MFS and 11 control aortas to evaluate the range of histopathologic changes in LDS. Standard hematoxylin and eosin and Movat pentachrome stains were performed. LDS samples had increased medial collagen and a subtle but diffuse form of elastic fiber fragmentation and extracellular matrix deposition, referred to as diffuse medial degeneration. LDS samples had significantly more diffuse medial degeneration compared with MFS and control samples (P<0.05), significantly less medial degeneration of the "cystic" variety compared with MFS (P<0.01) and significantly more collagen deposition than control samples (P<0.01). Additionally, an immunohistochemical stain for pSmad2, a marker of TGFbeta activity, was significantly increased in LDS patients compared with controls (P<0.001). Overall, the histologic findings of LDS are best appreciated with special stains to evaluate fibrosis and elastic fiber fragmentation. The changes described, although not entirely specific for LDS, help differentiate this entity from other vascular diseases in the appropriate clinicopathologic setting.
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| pubmed:grant | |
| pubmed:language |
eng
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| pubmed:journal | |
| pubmed:citationSubset |
IM
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| pubmed:chemical |
http://linkedlifedata.com/resource/pubmed/chemical/Collagen,
http://linkedlifedata.com/resource/pubmed/chemical/Protein-Serine-Threonine Kinases,
http://linkedlifedata.com/resource/pubmed/chemical/Receptors, Transforming Growth...,
http://linkedlifedata.com/resource/pubmed/chemical/transforming growth factor-beta...
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| pubmed:status |
MEDLINE
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| pubmed:month |
Feb
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| pubmed:issn |
1532-0979
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| pubmed:author | |
| pubmed:issnType |
Electronic
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| pubmed:volume |
33
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| pubmed:owner |
NLM
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| pubmed:authorsComplete |
Y
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| pubmed:pagination |
194-201
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| pubmed:meshHeading |
pubmed-meshheading:18852674-Adolescent,
pubmed-meshheading:18852674-Adult,
pubmed-meshheading:18852674-Aorta,
pubmed-meshheading:18852674-Child,
pubmed-meshheading:18852674-Child, Preschool,
pubmed-meshheading:18852674-Collagen,
pubmed-meshheading:18852674-Connective Tissue Diseases,
pubmed-meshheading:18852674-DNA Mutational Analysis,
pubmed-meshheading:18852674-Elastic Tissue,
pubmed-meshheading:18852674-Female,
pubmed-meshheading:18852674-Fibrosis,
pubmed-meshheading:18852674-Humans,
pubmed-meshheading:18852674-Infant,
pubmed-meshheading:18852674-Male,
pubmed-meshheading:18852674-Marfan Syndrome,
pubmed-meshheading:18852674-Middle Aged,
pubmed-meshheading:18852674-Protein-Serine-Threonine Kinases,
pubmed-meshheading:18852674-Receptors, Transforming Growth Factor beta,
pubmed-meshheading:18852674-Syndrome,
pubmed-meshheading:18852674-Tunica Media
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| pubmed:year |
2009
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| pubmed:articleTitle |
Histopathologic findings in ascending aortas from individuals with Loeys-Dietz syndrome (LDS).
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| pubmed:affiliation |
Department of Pathology, Johns Hopkins University School of Medicine, Baltimore, MD, USA.
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| pubmed:publicationType |
Journal Article,
Research Support, Non-U.S. Gov't
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