Capture and release of cells using a temperature-responsive surface that immobilizes an antibody through DNA duplex formation

Tsuyoshi Kimura, Naoko Nakamura, Kanji Umeda, Yoshihide Hashimoto, Akio Kishida

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We synthesized a temperature-responsive surface that immobilized an antibody via DNA duplex formation for selective capture and release of target cells. Polyethylene films were modified by grafting poly(N-isopropylacrylamide-co-acrylic acid) (P(NIPAAm-co-AAc)), which were prepared at various ratios of NIPAAm/AAc. The increased hydrophilicity of P(NIPAAm-co-PAA) film with decreased temperature was confirmed by water contact angle measurement. Single strand DNA (20mer) was chemically immobilized on the surface and then antibody (anti-mouse CD45, mCD45) modified with the complementary single strand DNA was immobilized on the surface through DNA duplex formation. The mCD45 antibody immobilization was confirmed by immunostaining. HeLa cells (mCD45 negative) and mouse bone marrow (BM) cells (mCD45 positive) were adhered on the surfaces at 37 °C. Although HeLa cells were detached by 4 °C incubation, BM cells were still adhered on the surface and then the adhered cells were released by DNase treatment. From these results, it was suggested that cells could be selectively captured and collected by using a film having surface that immobilizes an antibody via DNA duplex formation.

Original languageEnglish
Pages (from-to)1-11
Number of pages11
JournalJournal of Biomaterials Science, Polymer Edition
DOIs
Publication statusAccepted/In press - 2017 Mar 26
Externally publishedYes

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Keywords

  • antibody immobilization
  • polymer graft
  • Selective capture and release of cell
  • surface modification
  • temperature-response

ASJC Scopus subject areas

  • Bioengineering
  • Biophysics
  • Biomaterials
  • Biomedical Engineering

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