Microcavity array system for size-based enrichment of circulating tumor cells from the blood of patients with small-cell lung cancer

Masahito Hosokawa, Takayuki Yoshikawa, Ryo Negishi, Tomoko Yoshino, Yasuhiro Koh, Hirotsugu Kenmotsu, Tateaki Naito, Toshiaki Takahashi, Nobuyuki Yamamoto, Yoshihito Kikuhara, Hisashige Kanbara, Tsuyoshi Tanaka, Ken Yamaguchi, Tadashi Matsunaga*

*この研究の対応する著者

研究成果: Article査読

82 被引用数 (Scopus)

抄録

In this study, we present a method for efficient enrichment of small-sized circulating tumor cells (CTCs) such as those found in the blood of small-cell lung cancer (SCLC) patients using a microcavity array (MCA) system. To enrich CTCs from whole blood, a microfabricated nickel filter with a rectangular MCA (104 cavities/filter) was integrated with a miniaturized device, allowing for the isolation of tumor cells based on differences in size and deformability between tumor and blood cells. The shape and porosity of the MCA were optimized to efficiently capture small tumor cells on the microcavities under low flow resistance conditions, while allowing other blood cells to effectively pass through. Under optimized conditions, approximately 80% of SCLC (NCI-H69 and NCI-H82) cells spiked in 1 mL of whole blood were successfully recovered. In clinical samples, CTCs were detectable in 16 of 16 SCLC patients. In addition, the number of leukocytes captured on the rectangular MCA was significantly lower than that on the circular MCA (p < 0.001), suggesting that the use of the rectangular MCA diminishes a considerable number of carryover leukocytes. Therefore, our system has potential as a tool for the detection of CTCs in small cell-type tumors and detailed molecular analyses of CTCs.

本文言語English
ページ(範囲)5692-5698
ページ数7
ジャーナルAnalytical Chemistry
85
12
DOI
出版ステータスPublished - 2013 6月 18
外部発表はい

ASJC Scopus subject areas

  • 分析化学

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