Characterization and longitudinal monitoring of melanoma growth in ret-transgenic mice using a single-sequence MRI protocol
Spontaneous melanoma models in transgenic mice are increasingly used in preclinical research as they most closely match the progression of melanoma in humans. While optical inspection only allows analysis of tumors located on the skin, the accurate measurement and growth of subcutaneous tumors have...
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| Main Authors: | , , , , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
21 August 2012
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| In: |
Experimental dermatology
Year: 2012, Volume: 21, Issue: 11, Pages: 837-841 |
| ISSN: | 1600-0625 |
| DOI: | 10.1111/exd.12013 |
| Online Access: | Verlag, Volltext: http://dx.doi.org/10.1111/exd.12013 Verlag, Volltext: https://onlinelibrary.wiley.com/doi/abs/10.1111/exd.12013 
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| Author Notes: | Hans U. Kerl, Hanne Boll, Marcel Ramacher, Melanie Heilmann, Christoph Groden, Martin Kramer, Viktor Umansky, Marc A. Brockmann |
| Summary: | Spontaneous melanoma models in transgenic mice are increasingly used in preclinical research as they most closely match the progression of melanoma in humans. While optical inspection only allows analysis of tumors located on the skin, the accurate measurement and growth of subcutaneous tumors have not been adequately assessed. To improve the measurement accuracy of melanoma tumors, we used a fast single-sequence MRI protocol at 9.4 Tesla for longitudinal characterization of a ret-transgenic mouse model. Repeated MRI (average acquisition time 30 min per animal) of the trunk (excluding head and distal limbs) in six siblings revealed an increase in the mean total tumor volume (TTV) from 102.0 ± 80.5 mm3 at 35 days of age to 434.8 ± 154.9 mm3 by 77 days. The main tumor load was located within the pelvis (>40%), followed by the proximal hind limbs and groins (>30%). The smallest detectable tumor measured 0.07 mm3. Inter-rater reliability between a radiologist and a veterinarian analysing MRI data was 0.993 for TTV and 0.840 for number of tumors (both p < 0.001). We thus conclude that because of the high variance of TTV of same-aged mice, MRI should be used (i) to establish treatment groups matched for TTV and (ii) for longitudinal examination of the TTV in mice over the course of treatments. |
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| Item Description: | Gesehen am 08.08.2018 |
| Physical Description: | Online Resource |
| ISSN: | 1600-0625 |
| DOI: | 10.1111/exd.12013 |