Fibrillin-1 in the Vasculature: In Vivo Accumulation of eGFP-Tagged Fibrillin-1 in a Knockin Mouse Model.
Marfan syndrome
aorta
blood vessels
fibrillin
lung
Journal
Anatomical record (Hoboken, N.J. : 2007)
ISSN: 1932-8494
Titre abrégé: Anat Rec (Hoboken)
Pays: United States
ID NLM: 101292775
Informations de publication
Date de publication:
06 2020
06 2020
Historique:
received:
06
12
2018
revised:
24
02
2019
accepted:
14
03
2019
pubmed:
30
6
2019
medline:
17
2
2021
entrez:
29
6
2019
Statut:
ppublish
Résumé
Immunolocalization studies have shown that fibrillin-1 is distributed ubiquitously in the connective tissue space from early embryonic times through old age. When mutated, the gene for fibrillin-1 (FBN1) causes the Marfan syndrome, a common inherited disorder of connective tissue. The multiple manifestations of the Marfan syndrome reflect the known distribution of fibrillin-1 in cardiovascular, musculoskeletal, ocular, and dermal tissues. In this study, a mouse model of Marfan syndrome in which fibrillin-1 is truncated and tagged with green fluorescence was used to estimate the relative abundance of fibrillin-1 in developing tissues. In embryonic tissues, the aorta was the only tissue in which fibrillin-1 green fluorescence was detectable. Other arteries gained detectable fibrillin-1 green fluorescence just after birth. Fibrillin-1 fluorescence was observed at later postnatal times in the lung, skin, perichondrium, tendon, and ocular tissues, while other tissues remained negative. These results indicated that tissues most affected in the Marfan syndrome are the tissues in which fibrillin-1 is most abundant. Focus was placed on the aorta, since aortic disease is life threatening in the Marfan syndrome and fibrillin-1 green fluorescence was most abundant in this tissue. Fibrillin-1 green fluorescence and immunostaining showed that fibrillin-1 is within aortic medial elastic lamellae. Endothelial-specific compared to smooth muscle-specific fibrillin-1 green fluorescence, together with light microscopic analyses of fragmentation of aortic elastic lamellae, demonstrated that smooth muscle cell mutated fibrillin-1 contributed most to progressive aortic fragmentation. However, these studies also indicated that other cells, possibly endothelial cells, also contribute to this aortic pathology. Anat Rec, 2019. © 2019 Wiley Periodicals, Inc.
Substances chimiques
Fibrillin-1
0
Types de publication
Journal Article
Research Support, N.I.H., Extramural
Research Support, Non-U.S. Gov't
Langues
eng
Sous-ensembles de citation
IM
Pagination
1590-1603Subventions
Organisme : NIH HHS
ID : P01 AR049698
Pays : United States
Informations de copyright
© 2019 Wiley Periodicals, Inc.
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