イマシロ　チカヒロ   Imashiro Chikahiro   今城　哉裕    所属   医学研究科 医学研究科 (医学部医学科をご参照ください)    職種   非常勤講師
論文種別	原著
言語種別	英語
査読の有無	査読あり
表題	Homogenization of initial cell distribution by secondary flow of medium improves cell culture efficiency.
掲載誌名	正式名：PloS one 略　 称：PLoS One ISSNコード：19326203/19326203
掲載区分	国外
巻・号・頁	15(7),pp.e0235827
著者・共著者	FUKUMA Yuki†, INUI Takumi, IMASHIRO Chikahiro, KURASHINA Yuta, TAKEMURA Kenjiro*
発行年月	2020/07/15
概要	Homogenization of the initial cell distribution is essential for effective cell development. However, there are few previous reports on efficient cell seeding methods, even though the initial cell distribution has a large effect on cell proliferation. Dense cell regions have an inverse impact on cell development, known as contact inhibition. In this study, we developed a method to homogenize the cell seeding density using secondary flow, or Ekman transportation, induced by orbital movement of the culture dish. We developed an orbital shaker device that can stir the medium in a 35-mm culture dish by shaking the dish along a circular orbit with 2 mm of eccentricity. The distribution of cells in the culture dish can be controlled by the rotational speed of the orbital shaker, enabling dispersion of the initial cell distribution. The experimental results indicated that the cell density became most homogeneous at 61 rpm. We further evaluated the cell proliferation after homogenization of the initial cell density at 61 rpm. The results revealed 36% higher proliferation for the stirred samples compared with the non-stirred control samples. The present findings indicate that homogenization of the initial cell density by Ekman transportation contributes to the achievement of higher cell proliferation.
DOI	10.1371/journal.pone.0235827
PMID	32667933