Abstract:
:The precise assemblage of several types of cardiac precursors controls heart organogenesis. The cardiac precursors show dynamic movement during early development and then form the complicated heart structure. However, cardiomyocyte movements inside the newly organized mammalian heart remain unclear. We previously established the method of ex vivo time-lapse imaging of the murine heart to study cardiomyocyte behavior by using the Fucci (fluorescent ubiquitination-based cell cycle indicator) system, which can effectively label individual G1, S/G2/M, and G1/S-transition phase nuclei in living cardiomyocytes as red, green, and yellow, respectively. Global analysis of gene expression in Fucci green positive ventricular cardiomyocytes confirmed that cell cycle regulatory genes expressed in G1/S, S, G2/M, and M phase transitions were upregulated. Interestingly, pathway analysis revealed that many genes related to the cell cycle were significantly upregulated in the Fucci green positive ventricular cardiomyocytes, while only a small number of genes related to cell motility were upregulated. Time-lapse imaging showed that murine proliferating cardiomyocytes did not exhibit dynamic movement inside the heart, but stayed on site after entering the cell cycle.
journal_name
Biochem Biophys Res Communjournal_title
Biochemical and biophysical research communicationsauthors
Hashimoto H,Yuasa S,Tabata H,Tohyama S,Seki T,Egashira T,Hayashiji N,Hattori F,Kusumoto D,Kunitomi A,Takei M,Kashimura S,Yozu G,Shimojima M,Motoda C,Muraoka N,Nakajima K,Sakaue-Sawano A,Miyawaki A,Fukuda Kdoi
10.1016/j.bbrc.2015.07.036subject
Has Abstractpub_date
2015-09-04 00:00:00pages
1000-1007issue
4eissn
0006-291Xissn
1090-2104pii
S0006-291X(15)30267-9journal_volume
464pub_type
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