Neutrophil Chemotaxis in Moving Gradients

Mohammad Qasaimeh, Michal Pyzik, Mélina Astolfi, Silvia M. Vidal, David Juncker

Research output: Contribution to journalArticle

Abstract

Neutrophils are known to rapidly migrate to sites of infection and injury, and track bacteria guided by spatiotemporally controlled chemokine gradients. Previous studies of neutrophil chemotaxis, using micropipettes and lately microfluidic devices, are limited to stationary sources and gradients. Thus, despite the well-known ability of neutrophils to track bacteria in vitro, their response to defined moving gradients remains unknown. Here, a “floating” concentration gradient of interleukin-8 is generated using a microfluidic quadrupole, and neutrophils cultured in a Petri dish are challenged with steep stationary and moving gradients. Individual neutrophils are tracked by live microscopy and their chemotaxis is analyzed. Interestingly, neutrophils are shown to enter the gradient region in a rolling-like behavior, rapidly adhere to the bare dish, and polarize within 30 s, faster than what has been observed to date. Under stationary gradients, neutrophil migration length is maximal for cells located at the low end of the gradient, whereas under moving gradients, neutrophils migrate over longer distances and the length travelled is independent of their starting position. Furthermore, neutrophils are shown to initiate their migration at a maximum speed, slowing down when migrating deeper into the gradient and eventually stopping. This work lays the foundation for future chemotaxis assays with moving gradients.

Original languageEnglish (US)
Article number1700243
JournalAdvanced Biosystems
Volume2
Issue number7
DOIs
StatePublished - Jul 1 2018

Fingerprint

Chemotaxis
Microfluidics
Bacteria
Neutrophils
Interleukin-8
Chemokines
Assays
Microscopic examination
Lab-On-A-Chip Devices
Aptitude
Microscopy
Wounds and Injuries
Infection

Keywords

  • chemotaxis
  • concentration gradients
  • microfluidic quadrupole
  • microfluidics
  • neutrophils

ASJC Scopus subject areas

  • Biochemistry, Genetics and Molecular Biology(all)
  • Biomaterials
  • Biomedical Engineering

Cite this

Qasaimeh, M., Pyzik, M., Astolfi, M., Vidal, S. M., & Juncker, D. (2018). Neutrophil Chemotaxis in Moving Gradients. Advanced Biosystems, 2(7), [1700243]. https://doi.org/10.1002/adbi.201700243

Neutrophil Chemotaxis in Moving Gradients. / Qasaimeh, Mohammad; Pyzik, Michal; Astolfi, Mélina; Vidal, Silvia M.; Juncker, David.

In: Advanced Biosystems, Vol. 2, No. 7, 1700243, 01.07.2018.

Research output: Contribution to journalArticle

Qasaimeh, M, Pyzik, M, Astolfi, M, Vidal, SM & Juncker, D 2018, 'Neutrophil Chemotaxis in Moving Gradients', Advanced Biosystems, vol. 2, no. 7, 1700243. https://doi.org/10.1002/adbi.201700243
Qasaimeh M, Pyzik M, Astolfi M, Vidal SM, Juncker D. Neutrophil Chemotaxis in Moving Gradients. Advanced Biosystems. 2018 Jul 1;2(7). 1700243. https://doi.org/10.1002/adbi.201700243
Qasaimeh, Mohammad ; Pyzik, Michal ; Astolfi, Mélina ; Vidal, Silvia M. ; Juncker, David. / Neutrophil Chemotaxis in Moving Gradients. In: Advanced Biosystems. 2018 ; Vol. 2, No. 7.
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