著者

Hitoshi Ogino Osamu Iida Koichi Akutsu Yoshiro Chiba Hiromitsu Hayashi Hatsue Ishibashi-Ueda Shuichiro Kaji Masaaki Kato Kimihiro Komori Hitoshi Matsuda Kenji Minatoya Hiroko Morisaki Takao Ohki Yoshikatsu Saiki Kunihiro Shigematsu Norihiko Shiiya Hideyuki Shimizu Nobuyoshi Azuma Hirooki Higami Shigeo Ichihashi Toru Iwahashi Kentaro Kamiya Takahiro Katsumata Nobuyoshi Kawaharada Yoshihisa Kinoshita Takuya Matsumoto Shinji Miyamoto Takayuki Morisaki Tetsuro Morota Kiyonori Nanto Toshiya Nishibe Kenji Okada Kazumasa Orihashi Junichi Tazaki Masanao Toma Takuro Tsukube Keiji Uchida Tatsuo Ueda Akihiko Usui Kazuo Yamanaka Haruo Yamauchi Kunihiro Yoshioka Takeshi Kimura Tetsuro Miyata Yutaka Okita Minoru Ono Yuichi Ueda on behalf of the Japanese Circulation Society the Japanese Society for Cardiovascular Surgery the Japanese Association for Thoracic Surgery and the Japanese Society for Vascular Surgery Joint Working Group

出版者

The Japanese Circulation Society

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-22-0794, (Released:2023-09-01)

参考文献数

1943

被引用文献数

13

著者

Hiroshi Fujii Yu Ikeuchi Yasutaka Kurata Nobuhito Ikeda Udin Bahrudin Peili Li Yuji Nakayama Ryo Endo Akira Hasegawa Kumi Morikawa Junichiro Miake Akio Yoshida Kyoko Hidaka Takayuki Morisaki Haruaki Ninomiya Yasuaki Shirayoshi Kazuhiro Yamamoto Ichiro Hisatome

出版者

日本循環器学会

雑誌

Circulation Journal (ISSN:13469843)

巻号頁・発行日

pp.CJ-12-0126, (Released:2012-09-04)

参考文献数

27

被引用文献数

3 2

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Background: The prion protein (PrP) has been reported to serve as a surface maker for isolation of cardiomyogenic progenitors from murine embryonic stem (ES) cells. Although PrP-positive cells exhibited automaticity, their electrophysiological characteristics remain unresolved. The aim of the present study was therefore to investigate the electrophysiological properties of PrP-positive cells in comparison with those of HCN4p-or Nkx2.5-positive cells. Methods and Results: Differentiation of AB1, HCN5p-EGFP and hcgp7 ES cells into cardiac progenitors was induced by embryoid body (EB) formation. EBs were dissociated and cells expressing PrP, HCN4-EGFP and/or Nkx2.5-GFP were collected via flow cytometry. Sorted cells were subjected to reverse transcriptase-polymerase chain reaction, immunostaining and patch-clamp experiments. PrP-positive cells expressed mRNA of undifferentiation markers, first and second heart field markers, and cardiac-specific genes and ion channels, indicating their commitment to cardiomyogenic progenitors. PrP-positive cells with automaticity showed positive and negative chronotropic responses to isoproterenol and carbamylcholine, respectively. Hyperpolarization-activated cation current (If) was barely detectable, whereas Na+ and L-type Ca2+ channel currents were frequently observed. Their spontaneous activity was slowed by inhibition of sarcoplasmic reticulum Ca2+ uptake and release but not by blocking If. The maximum diastolic potential of their spontaneous firings was more depolarized than that of Nkx2.5-GFP-positive cells. Conclusions: PrP-positive cells contained cardiac progenitors that separated from the lineage of sinoatrial node cells. PrP can be used as a marker to enrich nascent cardiac progenitors.