A modified computer-assisted colorimetric microtitre assay (MTT) to assess in vitro radiosensitivity of V79, CaSki, HeLa and WiDr cells
The non-clonogenic MTT assay, based on the reduction of a tetrazolium salt to a purple formazan precipitate by living cells, was modified and a new procedure of analysis is proposed. The colorimetric assay could be performed semiautomatically using microtitre plate reader connected to a personal com...
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| Main Authors: | , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
1994
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| In: |
International journal of radiation biology
Year: 1994, Volume: 65, Issue: 2, Pages: 193-201 |
| ISSN: | 1362-3095 |
| DOI: | 10.1080/09553009414550231 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1080/09553009414550231
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| Author Notes: | M.J. Eble, F.W. Hensley, M. Flentje, A. Schlotz, M. Wannenmacher |
| Summary: | The non-clonogenic MTT assay, based on the reduction of a tetrazolium salt to a purple formazan precipitate by living cells, was modified and a new procedure of analysis is proposed. The colorimetric assay could be performed semiautomatically using microtitre plate reader connected to a personal computer. Data are processed and plotted with a customized program. To ensure that both control and irradiated microtitre plates contain exponentially growing cells at the time of analysis, the calculation of relative survival is based on a series of well-defined cell numbers initially seeded. To make the two endpoints of non-clonogenic and clonogenic assays comparable, i.e. counting of living cells versus counting of colonies, radiation-induced progression delay was incorporated into the calculation. Radiation-induced cell killing and progression delay could be determined in a single analysis, but in an independent way. X-ray survival curves were generated for V79, CaSki, WiDr and HeLa cells using the non-clonogenic and a standard clonogenic assay. Using the linear-quadratic formula, the resulting parameters α,β and the mean inactivation dose were not significantly different. The described assay is a feasible and reproducible technique for determination of cellular survival, which may be able to incorporate progression delay. The equivalence to a clonogenic survival assay could be proven. |
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| Item Description: | Gesehen am 06.02.2025 Elektronische Reproduktion der Druck-Ausgabe 3. Juli 2009 |
| Physical Description: | Online Resource |
| ISSN: | 1362-3095 |
| DOI: | 10.1080/09553009414550231 |