Medium-retaining Petri dish insert to grow and image cultured cells
| Autor: | Alan Feinerman, Lech Kiedrowski |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
Male
0301 basic medicine Fura-2 Primary Cell Culture Cell Culture Techniques Insert (molecular biology) law.invention 03 medical and health sciences chemistry.chemical_compound 0302 clinical medicine law Animals Humans Calcium Signaling Neurons Chemistry General Neuroscience Petri dish Optical Imaging Cortical neurons Coculture Techniques Culture Media Mice Inbred C57BL HEK293 Cells 030104 developmental biology Cell culture Astrocytes Biophysics Female 030217 neurology & neurosurgery Intracellular |
| Zdroj: | Journal of Neuroscience Methods. 294:111-115 |
| ISSN: | 0165-0270 |
| Popis: | Background Microscope chambers that accept glass coverslips with cultured cells are often used to monitor intracellular Ca2+ concentration ([Ca2+]i) during cell superfusion. Unfortunately, the experimental maneuvers associated with the coverslip installation in these chambers (medium removal and re-application) trigger unintended [Ca2+]i elevations. New method To prevent these [Ca2+]i elevations, a Petri dish insert has been constructed. The insert features a superfusion-optimized well to grow cell cultures. After this insert is removed from the Petri dish, the well retains the medium. This feature allows the inserts to be installed in microscope chambers while keeping the cells submerged at all times. Results These inserts were used to test the impact of a transient medium removal from the well (an equivalent of a coverslip removal from the medium) on [Ca2+]i in primary murine cortical neurons and astrocytes, and in HEK-293 cells. In all of these models, the medium removal/re-application caused a micromolar [Ca2+]i spike. While in neurons this spike was caused by a Ca2+ influx, in astrocytes and HEK-293 cells, it was caused by a Ca2+ release from intracellular stores. After the spike, a subpopulation of neurons failed to restore low [Ca2+]i; in 24% of the astrocytes, the spike triggered [Ca2+]i oscillations. However, prior to the spike, [Ca2+]i was low and uniform in all these cells. Comparison with existing method(s) The new method avoids the artificially-induced [Ca2+]i elevations that take place during the handling of glass coverslips with cultured cells. Conclusions The new method allows monitoring [Ca2+]i without disturbing the basal [Ca2+]i levels. |
| Databáze: | OpenAIRE |
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