著者

Yusei Nishikawa Hiroyuki Takaoka Masato Kanda Sae Yumita Sadahisa Ogasawara Michiko Daimon Yoshitada Noguchi Shuhei Aoki Katsuya Suzuki Kazuki Yoshida Satomi Yashima Makiko Kinoshita Haruka Sasaki Noriko Suzuki-Eguchi Naoya Kato Yoshio Kobayashi

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-23-0823, (Released:2023-12-20)

参考文献数

1

著者

Toshinao Takahashi Toshio Nagai Masato Kanda Mei-Lan Liu Naomichi Kondo Atsuhiko T Naito Takehiko Ogura Haruaki Nakaya Jong-Kook Lee Issei Komuro Yoshio Kobayashi

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

vol.79, no.12, pp.2703-2712, 2015-11-25 (Released:2015-11-25)

参考文献数

42

被引用文献数

7 17

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Background:Adipose tissue is one of the sources of mesenchymal stem cells, which have the potential to differentiate into various types of cells, including myocytes. Whether brown adipose tissue (BAT)-derived cells might differentiate into the cardiac pacemaking-conducting cells, and have the potential to regenerate the cardiac conduction system (CCS), is investigated in this study.Methods and Results:BAT was isolated from the interscapular area of mice and enzymatically digested before culture. Round or fusiform cells showed spontaneous beating at 4–7 days after culturing of BAT-derived cells. Reverse transcriptase-polymerase chain reaction analysis and immunocytochemical analysis revealed that BAT-derived cells expressed several cardiomyocytes, the CCS and pacemaker (PM) cell marker genes and proteins. Patch-clamp techniques revealed that spontaneous electrical activity and the shape of the action potential showed properties of cardiac PM cells. Next, a complete atrioventricular (AV) block was created in mice and green fluorescent protein-positive (GFP (+)) BAT-derived cells were injected intramyocardially around the AV node. At 1 week after transplantation, 50% of BAT-derived cells injected mice showed a sinus rhythm or a 2:1 AV block. Immunohistochemical analysis revealed that injected GFP (+) cells were engrafted and some GFP (+) cells co-expressed several cardiac PM cell marker proteins.Conclusions:BAT-derived cells differentiate into the CCS and PM-like cells in vitro and in vivo, and may become a useful cell source for arrhythmia therapy. (Circ J 2015; 79: 2703–2712)