Monitoring the growth effect of xenotransplanted human medulloblastoma in an immunocompromised mouse model using in vitro and ex vivo green fluorescent protein imaging

Medulloblastoma (MB) is one of the most common malignant brain tumors in children. It is a radiosensitive tumor. At 5 years after radical surgical excision and craniospinal axis irradiation, the tumor-free survival rate is from 50 to 70% [Halperin EC, Constine LS, Tarbell NJ, Kun LE. Pediatric radia...

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Bibliographic Details
Published in:Child's nervous system 2006-05, Vol.22 (5), p.475-480
Main Authors: Chiou, Shih-Hwa, Kao, Chung-Lan, Lin, Han-Tso, Tseng, Wen-Ser, Liu, Ren-Shyan, Chung, Chen-Fun, Ku, Hung-Hai, Lin, Ching-Po, Wong, Tai-Tong
Format: Article
Language:English
Subjects:
Animals
Cell Proliferation
Diagnostic Imaging
Disease Models, Animal
Glial Fibrillary Acidic Protein - metabolism
Green Fluorescent Proteins - biosynthesis
Green Fluorescent Proteins - metabolism
Humans
In Vitro Techniques
Medulloblastoma - metabolism
Medulloblastoma - pathology
Medulloblastoma - physiopathology
Mice
Mice, SCID
Neoplasm Transplantation - methods
Time Factors
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Summary:Medulloblastoma (MB) is one of the most common malignant brain tumors in children. It is a radiosensitive tumor. At 5 years after radical surgical excision and craniospinal axis irradiation, the tumor-free survival rate is from 50 to 70% [Halperin EC, Constine LS, Tarbell NJ, Kun LE. Pediatric radiation oncology (2005)]. In this study, we established xenotransplanted human MB (hMB) cells - isochromosome 17q - in a severe combined immunodeficiency (SCID) mouse model. We further transduced green fluorescent protein (GFP) into hMB cells to evaluate these hMB cells grafted in SCID mice. The result of an ex vivo GFP imaging system showed that a small lesion of the third-week-hMB-transplanted graft presented "green" signals with a clear tumor margin before any tumor-related symptoms were noted. We also demonstrated that the tumor progression could be monitored by GFP imaging for up to 12 weeks post-transplantation. This novel approach of GFP imaging assessment provides more accurate information of tumor status for experimental brain tumor studies. Because MB is sensitive to radiation and also response to chemotherapy, this SCID mouse model will be helpful for preclinical studies in the future.
ISSN:0256-7040
1433-0350
DOI:10.1007/s00381-005-0026-y