Dynamic Expression Profiles of Sox9 in Embryonic, Post Natal, and Adult Heart Valve Cell Populations. Anat Rec (Hoboken) 2019 Jan;302(1):108-116
Date
11/10/2018Pubmed ID
30412364Pubmed Central ID
PMC6312467DOI
10.1002/ar.23913Scopus ID
2-s2.0-85056317523 (requires institutional sign-in at Scopus site) 8 CitationsAbstract
Heart valves are dynamic structures and abnormalities during embryonic development can lead to premature lethality or congenital malformations present at birth. The transcription factor Sox9 has been shown to be critical for early and late stages of valve formation, but its defined expression pattern throughout embryonic, post natal, and adult growth and maturation is incomplete. Here we use an antibody to detect 1-100 amino acids of Sox9 and show that in the developing embryo, Sox9 is not detected in valve endothelial cells (VECs) lining the primitive valve structures, but is highly expressed in the endothelial-derived valve interstitial cell population following endothelial-to-mesenchymal transformation. Expression is maintained in this cell population after birth, but is additionally detected in VECs from post natal day 1. Using a specific antibody to detect a phosphorylated form of Sox9 at Serine 181 (pSox9), we note enrichment of pSox9 in VECs at post natal days 1 and 10 and this pattern correlates with the known upstream kinase RockI, and downstream target, Aggrecan. The contribution of Sox9 to post natal growth and maturation of the valve is not known, but this study provides insights for future work examining the differential functions of Sox9 protein in valve cell populations. Anat Rec, 302:108-116, 2019. © 2018 Wiley Periodicals, Inc.
Author List
Gallina D, Lincoln JAuthor
Joy Lincoln PhD Professor in the Pediatrics department at Medical College of WisconsinMESH terms used to index this publication - Major topics in bold
AnimalsAnimals, Newborn
Embryonic Stem Cells
Endothelium, Vascular
Gene Expression Regulation, Developmental
Heart Valves
Mice
Mice, Inbred C57BL
SOX9 Transcription Factor