A Practical Micropipette-Image Calibration Method for Somatic Cell Microinjection

Fei PAN, Shuxun CHEN, Liushuai ZHENG, Shaohua ZHI, Xi CHEN, Dong SUN

Research output: Journal PublicationsJournal Article (refereed)peer-review

Abstract

This paper proposes a practical micropipette-image (2-D pixel and 3-D spatial coordination) calibration method indispensable to somatic cell microinjection, leveraging advancements in modern motorized micromanipulators. The method determines the depth information of the micropipette in the microscope field by assessing the contact between the micropipette tip and the bottom of the culture dish. It uses recoverable deformation upon contact as a criterion for precise positioning, ensuring the tip is on the dish’s bottom surface and in the microscope’s focus plane. Additionally, the paper introduces an on-the-spot method for breaking a micropipette tip and a preprocessing technique for somatic cells. The proposed micropipette tip-breaking method, using a low-cost acrylic ring, overcomes previous drawbacks and proves quick and user-friendly. The preprocessing technique converts fully adherent somatic cells into semi-adherent cells, increasing cell thickness for easier puncturing. Combining these techniques, the study validated the approaches through over 900 injections on human dermal fibroblast (HDF) cells, achieving a success rate of 53.3% and a survival rate of 95.8%.
Original languageEnglish
JournalIEEE Transactions on Automation Science and Engineering
Early online date27 Jan 2025
DOIs
Publication statusE-pub ahead of print - 27 Jan 2025

Bibliographical note

Publisher Copyright:
© 2004-2012 IEEE.

Keywords

  • Micropipette-image calibration
  • robotic cell microinjection
  • somatic cells

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