Targeted gene expression analyses and immunohistology suggest a pro-proliferative state in tricuspid aortic valve-, and senescence and viral infections in bicuspid aortic valve-associated thoracic aortic aneurysms.
Atherosclerosis
; 271: 111-119, 2018 04.
Article
em En
| MEDLINE
| ID: mdl-29486395
ABSTRACT
BACKGROUND AND AIMS:
Despite the potential life-threatening consequences of thoracic aortic aneurysms (TAAs), the pathogenesis of these diseases is still poorly understood. While some aspects of TAA formation have been elucidated, the role of vascular smooth muscle cells (SMCs) in both bicuspid aortic valve (BAV)-associated and degenerative tricuspid aortic valve (TAV)-associated TAAs has not yet been fully unravelled. Thus, this work was aimed at uncovering processes in SMC biology that may contribute to TAA formation.METHODS:
Using isolated SMCs and tissue samples from TAAs linked to BAV syndrome, TAV-associated degenerative TAAs and control aortas, we performed targeted mRNA expression profile analyses and conducted immunohistological analyses on aortic wall tissue sections.RESULTS:
While SMC expression profiles and tissue analyses in TAV-TAAs clearly point toward a pro-proliferative state of the aortic media SMCs, BAV-TAA SMCs and tissue provide evidence for DNA damage, DNA damage response signalling as well as profound TLR-3 signalling.CONCLUSIONS:
The data presented in this study emphasizes the importance of SMCs in TAA development. Furthermore, our results provide evidence that the state of SMCs in the BAV-TAA (senescent) and TAV-TAA (pro-proliferative) differs significantly. For the first time, we also present findings that may argue for the occurrence of a viral infection in BAV-TAA SMCs.Palavras-chave
Texto completo:
1
Coleções:
01-internacional
Base de dados:
MEDLINE
Assunto principal:
Aorta Torácica
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Valva Aórtica
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Viroses
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Senescência Celular
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Aneurisma da Aorta Torácica
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Miócitos de Músculo Liso
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Proliferação de Células
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Transcriptoma
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Doenças das Valvas Cardíacas
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Músculo Liso Vascular
Tipo de estudo:
Etiology_studies
/
Observational_studies
/
Risk_factors_studies
Idioma:
En
Revista:
Atherosclerosis
Ano de publicação:
2018
Tipo de documento:
Article